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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from argparse import Namespace
import logging
from typing import Union, Tuple, Optional
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq.data import encoders
from fairseq.data.audio.audio_utils import (
get_waveform as get_wav,
convert_waveform as convert_wav,
get_fbank,
)
import fairseq.data.audio.feature_transforms.utterance_cmvn as utt_cmvn
from fairseq.data.audio.speech_to_text_dataset import SpeechToTextDataset
logger = logging.getLogger(__name__)
class S2THubInterface(nn.Module):
def __init__(self, cfg, task, model):
super().__init__()
self.cfg = cfg
self.task = task
self.model = model
self.model.eval()
self.generator = self.task.build_generator([self.model], self.cfg)
@classmethod
def get_model_input(cls, task, audio: Union[str, torch.Tensor]):
input_type = task.data_cfg.hub.get("input_type", "fbank80")
if input_type == "fbank80_w_utt_cmvn":
if isinstance(audio, str):
feat = utt_cmvn.UtteranceCMVN()(get_fbank(audio))
feat = feat.unsqueeze(0) # T x D -> 1 x T x D
else:
import torchaudio.compliance.kaldi as kaldi
feat = kaldi.fbank(audio, num_mel_bins=80).numpy() # 1 x T x D
elif input_type in {"waveform", "standardized_waveform"}:
if isinstance(audio, str):
feat, sr = get_wav(audio) # C x T
feat, _ = convert_wav(
feat, sr, to_sample_rate=16_000, to_mono=True
) # C x T -> 1 x T
else:
feat = audio.numpy()
else:
raise ValueError(f"Unknown value: input_type = {input_type}")
src_lengths = torch.Tensor([feat.shape[1]]).long()
src_tokens = torch.from_numpy(feat) # 1 x T (x D)
if input_type == "standardized_waveform":
with torch.no_grad():
src_tokens = F.layer_norm(src_tokens, src_tokens.shape)
return {
"net_input": {
"src_tokens": src_tokens,
"src_lengths": src_lengths,
"prev_output_tokens": None,
},
"target_lengths": None,
"speaker": None,
}
@classmethod
def detokenize(cls, task, tokens):
text = task.tgt_dict.string(tokens)
tkn_cfg = task.data_cfg.bpe_tokenizer
tokenizer = encoders.build_bpe(Namespace(**tkn_cfg))
return text if tokenizer is None else tokenizer.decode(text)
@classmethod
def get_prefix_token(cls, task, lang):
prefix_size = int(task.data_cfg.prepend_tgt_lang_tag)
prefix_tokens = None
if prefix_size > 0:
assert lang is not None
lang_tag = SpeechToTextDataset.get_lang_tag_idx(lang, task.tgt_dict)
prefix_tokens = torch.Tensor([lang_tag]).long().unsqueeze(0)
return prefix_tokens
@classmethod
def get_prediction(
cls, task, model, generator, sample, tgt_lang=None, synthesize_speech=False
) -> Union[str, Tuple[str, Tuple[torch.Tensor, int]]]:
_tgt_lang = tgt_lang or task.data_cfg.hub.get("tgt_lang", None)
prefix = cls.get_prefix_token(task, _tgt_lang)
pred_tokens = generator.generate([model], sample, prefix_tokens=prefix)
pred = cls.detokenize(task, pred_tokens[0][0]["tokens"])
if synthesize_speech:
pfx = f"{_tgt_lang}_" if task.data_cfg.prepend_tgt_lang_tag else ""
tts_model_id = task.data_cfg.hub.get(f"{pfx}tts_model_id", None)
if tts_model_id is None:
logger.warning("TTS model configuration not found")
else:
_repo, _id = tts_model_id.split(":")
tts_model = torch.hub.load(_repo, _id, verbose=False)
pred = (pred, tts_model.predict(pred))
return pred
def predict(
self,
audio: Union[str, torch.Tensor],
tgt_lang: Optional[str] = None,
synthesize_speech: bool = False,
) -> Union[str, Tuple[str, Tuple[torch.Tensor, int]]]:
# `audio` is either a file path or a 1xT Tensor
# return either text or (text, synthetic speech)
sample = self.get_model_input(self.task, audio)
return self.get_prediction(
self.task,
self.model,
self.generator,
sample,
tgt_lang=tgt_lang,
synthesize_speech=synthesize_speech,
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/speech_to_text/hub_interface.py
|
#!/usr/bin/env python3
# Copyright (c) 2017-present, Facebook, Inc.
# All rights reserved.
#
# This source code is licensed under the license found in the LICENSE file in
# the root directory of this source tree. An additional grant of patent rights
# can be found in the PATENTS file in the same directory.
import math
import re
from functools import partial
from typing import List, Optional, Tuple
import torch
import torch.nn as nn
from torch import Tensor
from torch import device as Device
from fairseq.models import FairseqEncoder
from fairseq.models.speech_to_text.utils import (
NoOp,
attention_suppression,
layer_norm_backward_hook,
lengths_to_padding_mask,
segments_to_sequence,
)
try:
import torch.ao.quantization as quantization
from torch.ao.quantization.qconfig import (
default_dynamic_qconfig,
per_channel_dynamic_qconfig,
)
except ImportError:
import torch.quantization as quantization
from torch.quantization.qconfig import (
default_dynamic_qconfig,
per_channel_dynamic_qconfig,
)
class RelativePositionEmbedding(nn.Module):
"""
Implementation according to https://arxiv.org/abs/1803.02155
"""
def __init__(self, head_dim, max_position, norm_init=True):
super().__init__()
self.head_dim = head_dim
self.max_position = max_position
self.embeddings = nn.Parameter(torch.Tensor(max_position * 2 + 1, head_dim))
if norm_init:
nn.init.xavier_normal_(self.embeddings)
else:
nn.init.xavier_uniform_(self.embeddings)
def forward(self, input: Tensor):
output = nn.functional.embedding(input.long(), self.embeddings)
return output
class Fp32LayerNorm(nn.Module):
def __init__(
self,
input_dim,
clamp_grad=True,
max_grad_value=256,
eps=1e-5,
elementwise_affine=True,
):
super().__init__()
self.torch_module = torch.nn.LayerNorm(
input_dim, eps=eps, elementwise_affine=elementwise_affine
)
if clamp_grad:
hook = partial(layer_norm_backward_hook, clamp_value=max_grad_value)
self.torch_module.register_backward_hook(hook)
def forward(self, input):
output = torch.nn.functional.layer_norm(
input.float(),
self.torch_module.normalized_shape,
self.torch_module.weight.float()
if self.torch_module.weight is not None
else None,
self.torch_module.bias.float()
if self.torch_module.bias is not None
else None,
self.torch_module.eps,
).type_as(input)
return output
# ------------------------------------------------------------------------------
# PositionwiseFF
# ------------------------------------------------------------------------------
class PositionwiseFF(nn.Module):
"""
FFN layer in transformer.
Args:
input_dim: input embedding dimension
ffn_dim: FFN layer inner dimension
dropout_on_fc1: dropout for first linear layer
dropout_on_fc2: dropout fr second linear layer
activation_fn: activation function used after first linear layer. \
Only relu or gelu is supported.
"""
def __init__(
self, input_dim, ffn_dim, dropout_on_fc1, dropout_on_fc2, activation_fn
):
super(PositionwiseFF, self).__init__()
self.input_dim = input_dim
self.ffn_dim = ffn_dim
if activation_fn == "relu":
ac = nn.ReLU()
elif activation_fn == "gelu":
ac = nn.GELU()
else:
raise ValueError("Unsupported activation_fn = ({})".format(activation_fn))
# fc1 -> ac -> dropout -> fc2 -> dropout
self.module = nn.Sequential(
nn.Linear(input_dim, ffn_dim),
ac,
nn.Dropout(dropout_on_fc1),
nn.Linear(ffn_dim, input_dim),
nn.Dropout(dropout_on_fc2),
)
self.layer_norm = Fp32LayerNorm(input_dim)
def forward(self, input):
module_out = self.module(self.layer_norm(input))
output = module_out + input
return output
def quantize_(self, params=None):
if params and "per_channel" in params and params["per_channel"]:
qconfig = per_channel_dynamic_qconfig
else:
qconfig = default_dynamic_qconfig
quantization.quantize_dynamic(
self, {torch.nn.Linear: qconfig}, dtype=torch.qint8, inplace=True
)
return self
# ------------------------------------------------------------------------------
# SummarizationLayer
# ------------------------------------------------------------------------------
class SummarizationLayer(nn.Module):
def __init__(self, method, segment_size, embedding_dim):
super(SummarizationLayer, self).__init__()
self.segment_size = segment_size
self.embedding_dim = embedding_dim
nonlin_match = re.match(r"nonlinear\((?P<act>[a-z]+),(?P<dim>[0-9]+)\)", method)
self.method = method
if method == "mean":
self.module = nn.AvgPool1d(
kernel_size=segment_size,
stride=segment_size,
ceil_mode=True,
)
elif method == "max":
self.module = nn.MaxPool1d(
kernel_size=segment_size,
stride=segment_size,
ceil_mode=True,
)
elif method == "linear":
self.module = nn.Linear(segment_size, 1)
elif nonlin_match:
nonlin_args = nonlin_match.groupdict()
act_type = nonlin_args["act"]
hid_dim = int(nonlin_args["dim"])
if act_type == "relu":
act = nn.ReLU()
elif act_type == "gelu":
act = nn.GELU()
else:
raise ValueError("Unsupported activation_fn = ({})".format(act_type))
self.module = nn.Sequential(
nn.Linear(segment_size, hid_dim),
act,
nn.Linear(hid_dim, 1),
)
else:
raise ValueError("Unsupported summarization method = ({})".format(method))
def forward(self, input):
# T, B, D -> B, D, T
input = input.permute(1, 2, 0)
if self.method == "mean" or self.method == "max":
output = self.module(input)
output = output.permute(2, 0, 1)
return output
full_seg_length = input.size(2) // self.segment_size * self.segment_size
if full_seg_length > 0:
# at least one seg is full
B = input.size(0)
D = input.size(1)
input_todo = (
input[:, :, :full_seg_length]
.contiguous()
.view(B, -1, self.segment_size)
)
output = self.module(input_todo)
output = output.view(B, D, -1)
else:
output = input.new_zeros(input.size(0), input.size(1), 0)
left = input.size(2) - full_seg_length
if left > 0:
# when last seg is not full, use zeros as last memory placeholder
zeros = input.new_zeros(input.size(0), input.size(1), 1)
output = torch.cat([output, zeros], dim=2)
output = output.permute(2, 0, 1)
return output
# ------------------------------------------------------------------------------
# NoSegAugmentedMemoryMultiheadAttentionBmm
# ------------------------------------------------------------------------------
class NoSegAugmentedMemoryMultiheadAttentionBmm(nn.Module):
"""
Whole utterance augmented memory multihead attention using BMM.
Different with previous augmented memory multihead attention where
the utterance is chunked into segments. Here we use attention mask
achieve so. The input embedding [right_context, utterance, summary]
is a concatenation of right context, utterance and summary.
Right context block is the concatenation of all the right context for
each segments. [right_context_0, right_context_1, ..., right_context_n]
For example, if we have utterance = [v0, v1, v2, ...., v20]. segment
size 8, right_context size 4. Then the right context blocks =
[v8, v9, v10, v11, v16, v17, v18, v19, 0, 0, 0, 0], where v8, v9, v10,
and v11 are the right context for first segment. v16, v17, v18 and v19
are the right context for second segment. 0, 0, 0 and 0 are right context
for the last segment.
utterance is corresponding to input embedding sequence
summary is concatenation of average of each segments. [summary_0,
summary_1, ..., ].
In augmented memory multihead attention, the query is [right_context,
utterance, summary], key is [memory, right_context, utterance]. Different
with AugmentedMemoryMultiheadAttentionBmm, memory here is passed from
previous attention layer. For the first attention layer, memory is average
of each segment.
Memory is a concatenation of memory from each segments in previous attention
layer. For example, current layer is i, then memory is [m_0, m_1, ..., m_n].
Each m_k is the output from seg_k in layer i-1.
args:
input_dim: input embedding dimension
num_heads: number of heads in multihead self-attention
dropout: attention dropout
std_scale: if std_scale is not None. The weak attention suppression is
turned on. For std_scale = 0.5, all the attention smaller than
mean + 0.5 * std will be suppressed.
scaled_init: whether to use scaled init for linear weight
tanh_on_mem: whether to use tanh on memory output
use_mem: whether to use memory or not. When max_memory_size is 0, then
we don't have memory anymore.
layer_index: current self-attention layer index that is used in depth
initialization
max_relative_position: max relative position used in relative position
embedding
rpe_old_option: To be compatible with previous model. The previous model
was trained with attention += attention + rpe. The correct equation
should be attention = attention + rpe
"""
def __init__(
self,
input_dim,
num_heads,
dropout=0.0,
std_scale=None,
scaled_init=False,
tanh_on_mem=False,
use_mem=True,
mini_batches=False,
negative_inf="-inf",
layer_index=-1,
max_relative_position=0,
rpe_old_option=True,
):
if input_dim % num_heads:
raise ValueError(
"input_dim ({}) must be divisible by num_heads ({})".format(
input_dim, num_heads
)
)
super().__init__()
embed_dim = input_dim
self.e2h_kv = torch.nn.Linear(input_dim, 2 * input_dim, bias=True)
self.e2h_q = torch.nn.Linear(input_dim, input_dim, bias=True)
self.rpe_old_option = rpe_old_option
if max_relative_position > 0:
self.use_rpe = True
self.rpe_k = RelativePositionEmbedding(
head_dim=input_dim // num_heads,
max_position=max_relative_position,
)
self.rpe_v = RelativePositionEmbedding(
head_dim=input_dim // num_heads,
max_position=max_relative_position,
)
else:
self.use_rpe = False
self.rpe_k = None
self.rpe_v = None
if scaled_init:
if layer_index == -1:
gain = 1.0 / math.sqrt(2)
else:
# https://arxiv.org/abs/2005.09684 depthwise initialization
# stablize the training greatly. Use depthwise initialization to
# replace incremental loss.
gain = 1.0 / math.sqrt(layer_index + 1)
torch.nn.init.xavier_uniform_(self.e2h_kv.weight, gain=gain)
torch.nn.init.xavier_uniform_(self.e2h_q.weight, gain=gain)
self.out_proj = torch.nn.Linear(embed_dim, embed_dim, bias=True)
self.embed_dim = embed_dim
self.num_heads = num_heads
self.dropout = dropout
self.head_dim = embed_dim // num_heads
self.scaling = self.head_dim ** -0.5
self.std_scale = std_scale
self.use_mem = use_mem
self.mini_batches = mini_batches
self.negative_inf = negative_inf
if tanh_on_mem:
self.squash_mem = torch.tanh
self.nonlinear_squash_mem = True
else:
self.squash_mem = NoOp()
self.nonlinear_squash_mem = False
def prepare_qkv(
self,
input: Tensor,
mems: Tensor,
lengths: Tensor,
summary_length: int,
lc_length: int,
):
# T: right_context length + utterance_length + summary_length
T, B, D = input.shape
mem_length = mems.size(0)
utterance_length = torch.max(lengths)
right_context_blocks_length = T - utterance_length - summary_length
rc_block = input[:right_context_blocks_length, :, :]
utterance_block = input[right_context_blocks_length : T - summary_length, :, :]
if B == 1:
padding_mask = None
else:
klengths = lengths + mem_length + right_context_blocks_length + lc_length
padding_mask = lengths_to_padding_mask(lengths=klengths)
mem_rc_input = torch.cat([mems, rc_block, utterance_block], dim=0)
# In training lc_length = 0
key_length = mem_rc_input.size(0) + lc_length
rc_input_sum = input
q = self.e2h_q(rc_input_sum)
kv = self.e2h_kv(mem_rc_input)
k, v = kv.chunk(chunks=2, dim=2)
result_qkv = (q, k, v)
input_shape = (T, B, D)
result_lengths_info = (
mem_length,
utterance_length,
right_context_blocks_length,
key_length,
)
if padding_mask is not None:
assert padding_mask.size(0) == B
assert padding_mask.size(1) == key_length
return result_qkv, input_shape, result_lengths_info, padding_mask
def prepare_attention_weights(
self,
q: Tensor,
new_k: Tensor,
new_v: Tensor,
input_shape: Tuple[int, int, int],
rpe: Optional[Tensor],
) -> Tuple[Tensor, Tensor, Tensor]:
T, B, D = input_shape
q = (
q.contiguous().view(-1, B * self.num_heads, self.head_dim).transpose(0, 1)
* self.scaling
)
k = (
new_k.contiguous()
.view(-1, B * self.num_heads, self.head_dim)
.transpose(0, 1)
)
v = (
new_v.contiguous()
.view(-1, B * self.num_heads, self.head_dim)
.transpose(0, 1)
)
attention_weights = torch.bmm(q, k.transpose(1, 2))
if self.use_rpe and rpe is not None and self.rpe_v is not None:
r_k = self.rpe_k(rpe)
# [q, B*h, d] * [q, k, d] -> [B*h, q, k]
attention_weights_rpe = torch.matmul(
q.transpose(0, 1), r_k.transpose(1, 2)
).transpose(0, 1)
attention_weights = attention_weights + attention_weights_rpe
attention_weights_float = attention_weights.float()
return attention_weights, attention_weights_float, v
def prepare_attention_output(
self,
attention_weights: Tensor,
attention_weights_float: Tensor,
v: Tensor,
input_shape: Tuple[int, int, int],
key_length: int,
padding_mask: Optional[Tensor],
rpe: Optional[Tensor],
) -> Tensor:
T, B, D = input_shape
if padding_mask is not None:
attention_weights_float = attention_weights_float.view(
B, self.num_heads, T, key_length
)
attention_weights_float = attention_weights_float.masked_fill(
padding_mask.unsqueeze(1).unsqueeze(2).to(torch.bool), float("-inf")
)
attention_weights_float = attention_weights_float.view(
B * self.num_heads, T, key_length
)
if self.std_scale is not None:
attention_weights_float = attention_suppression(
attention_weights_float, self.std_scale
)
attention_weights_float = torch.nn.functional.softmax(
attention_weights_float, dim=-1
)
attention_weights = attention_weights_float.type_as(attention_weights)
attention_probs = torch.nn.functional.dropout(
attention_weights, p=self.dropout, training=self.training
)
# [T, key_length, B, n_head]+ [key_length, B, n_head, d_head]
# -> [T, B, n_head, d_head]
attention = torch.bmm(attention_probs, v)
if self.use_rpe and rpe is not None and self.rpe_v is not None:
r_v = self.rpe_v(rpe)
attention_rpe = torch.matmul(
attention_probs.transpose(0, 1), r_v
).transpose(0, 1)
if self.rpe_old_option:
attention += attention + attention_rpe
else:
attention = attention + attention_rpe
assert list(attention.shape) == [B * self.num_heads, T, self.head_dim]
attention = attention.transpose(0, 1).contiguous().view(T, B, self.embed_dim)
rc_output_memory = self.out_proj(attention)
return rc_output_memory
@torch.jit.unused
def forward(
self,
input: Tensor,
lengths: Tensor,
mems: Tensor,
attention_mask: Tensor,
pre_mems: Optional[Tensor] = None,
left_context_key: Optional[Tensor] = None,
left_context_val: Optional[Tensor] = None,
rpe: Optional[Tensor] = None,
) -> Tuple[Tensor, Tensor, Tensor, Tensor]:
"""
forward function for NoSegAugmentedMemoryMultiheadAttentionBmm in training.
args:
input: formed in the following way
[right_context_0, right_contex_1, ..., seg_0, seg_1,
..., summary_0, summary_1,..]
lengths: the length of query which is [seg_0, seg_1, ....]
mems: [mem_0, mem_1, ...].
attention_mask: attention mask for query = [right_context, query, summary]
key = [mem, right_context, query]. This is only used for traing.
"""
if self.use_mem:
mem_length = mems.size(0)
summary_length = mem_length + 1
if pre_mems is not None:
mems = torch.cat([pre_mems, mems], dim=0)
else:
mem_length = 0
summary_length = 0
# In training, lc_length = 0
if left_context_key is not None:
lc_length = left_context_key.size(0)
else:
lc_length = 0
results = self.prepare_qkv(
input=input,
mems=mems,
lengths=lengths,
summary_length=summary_length,
lc_length=lc_length,
)
result_qkv, input_shape, result_lengths_info, padding_mask = results
q, k, v = result_qkv
(
mem_length,
utterance_length,
right_context_blocks_length,
key_length,
) = result_lengths_info
if left_context_key is not None:
# add the cache key and value
new_k = torch.cat(
[
k[: mem_length + right_context_blocks_length, :, :],
left_context_key,
k[-utterance_length:, :, :],
],
dim=0,
)
new_v = torch.cat(
[
v[: mem_length + right_context_blocks_length, :, :],
left_context_val,
v[-utterance_length:, :, :],
],
dim=0,
)
next_k = new_k[mem_length + right_context_blocks_length :, :, :]
next_v = new_v[mem_length + right_context_blocks_length :, :, :]
else:
new_k = k
new_v = v
next_k = None
next_v = None
attention_weights, attention_weights_float, v = self.prepare_attention_weights(
q=q,
new_k=new_k,
new_v=new_v,
input_shape=input_shape,
rpe=rpe,
)
# mask attention
attention_mask = attention_mask.unsqueeze(0)
attention_weights_float = attention_weights_float.masked_fill(
attention_mask, float(self.negative_inf)
)
rc_output_memory = self.prepare_attention_output(
attention_weights=attention_weights,
attention_weights_float=attention_weights_float,
v=v,
input_shape=input_shape,
key_length=key_length,
padding_mask=padding_mask,
rpe=rpe,
)
if self.use_mem:
# next_m length equals to summary length - 1
# last memory is ignored
if self.mini_batches:
next_m = rc_output_memory[-summary_length:]
else:
next_m = rc_output_memory[-summary_length:-1]
next_m = self.squash_mem(next_m)
# rc and output
rc_output = rc_output_memory[:-summary_length]
if not self.nonlinear_squash_mem:
next_m = torch.clamp(next_m, min=-10, max=10)
else:
next_m = mems
rc_output = rc_output_memory
return rc_output, next_m, next_k, next_v
@torch.jit.export
def forward_jit(
self,
input: Tensor,
lengths: Tensor,
mems: Tensor,
left_context_key: Tensor,
left_context_val: Tensor,
rpe: Optional[Tensor],
) -> Tuple[Tensor, Tensor, Tensor, Tensor]:
"""
forward function for NoSegAugmentedMemoryMultiheadAttentionBmm in decoding.
args:
input: formed in the following way
[right_context_0, right_contex_1, ..., seg_0, seg_1,
..., summary_0, summary_1,..]
lengths: the length of query which is [seg_0, seg_1, ....]
mems: [mem_0, mem_1, ...].
left_context_key: left_context for key part. This is only used for online
decoding. In training, this is empty tensor
left_context_val: left_context for value part. This is only used for online
decoding. In training, this is empty tensor
"""
lc_length = left_context_key.size(0)
# In decoding, summary_length = 1 or 0
if self.use_mem:
summary_length = 1
else:
summary_length = 0
results = self.prepare_qkv(
input=input,
mems=mems,
lengths=lengths,
summary_length=summary_length,
lc_length=lc_length,
)
result_qkv, input_shape, result_lengths_info, padding_mask = results
q, k, v = result_qkv
(
mem_length,
utterance_length,
right_context_blocks_length,
key_length,
) = result_lengths_info
# add the cache key and value
new_k = torch.cat(
[
k[: mem_length + right_context_blocks_length, :, :],
left_context_key,
k[-utterance_length:, :, :],
],
dim=0,
)
new_v = torch.cat(
[
v[: mem_length + right_context_blocks_length, :, :],
left_context_val,
v[-utterance_length:, :, :],
],
dim=0,
)
next_k = new_k[mem_length + right_context_blocks_length :, :, :]
next_v = new_v[mem_length + right_context_blocks_length :, :, :]
attention_weights, attention_weights_float, v = self.prepare_attention_weights(
q=q,
new_k=new_k,
new_v=new_v,
input_shape=input_shape,
rpe=rpe,
)
# In online decoding, we don't have attention mask. But we still need
# to disable the attention from summary query to memory
attention_weights_float[:, -1, :mem_length] = float(self.negative_inf)
rc_output_memory = self.prepare_attention_output(
attention_weights=attention_weights,
attention_weights_float=attention_weights_float,
v=v,
input_shape=input_shape,
key_length=key_length,
padding_mask=padding_mask,
rpe=rpe,
)
# In decoding, summary length is 1
if self.use_mem:
next_m = rc_output_memory[-1:]
next_m = self.squash_mem(next_m)
# rc and output
rc_output = rc_output_memory[:-1]
if not self.nonlinear_squash_mem:
next_m = torch.clamp(next_m, min=-10, max=10)
else:
rc_output = rc_output_memory
# empty tensor as input mems
next_m = mems
return rc_output, next_m, next_k, next_v
def quantize_(self, params=None):
if params and "per_channel" in params and params["per_channel"]:
qconfig = per_channel_dynamic_qconfig
else:
qconfig = default_dynamic_qconfig
quantization.quantize_dynamic(
self, {torch.nn.Linear: qconfig}, dtype=torch.qint8, inplace=True
)
return self
class NoSegAugmentedMemoryTransformer(nn.Module):
"""
Whole utterance augmented memory transformer.
This is not pyspeech nn layer. It is used as a module in a master layer where
multiple transformers is used.
"""
def __init__(
self,
input_dim,
num_heads,
ffn_dim,
dropout_in_attn=0.0,
dropout_on_attn=None,
dropout_on_fc1=None,
dropout_on_fc2=None,
activation_fn="relu",
tanh_on_mem=False,
std_scale=None,
scaled_init=False,
segment_size=128,
use_mem=True,
mini_batches=False,
negative_inf="-inf",
layer_index=-1,
summarization_method="mean",
max_relative_position=0,
rpe_old_option=True,
):
super(NoSegAugmentedMemoryTransformer, self).__init__()
self.attention = NoSegAugmentedMemoryMultiheadAttentionBmm(
input_dim=input_dim,
num_heads=num_heads,
dropout=dropout_in_attn,
scaled_init=scaled_init,
tanh_on_mem=tanh_on_mem,
std_scale=std_scale,
use_mem=use_mem,
mini_batches=mini_batches,
negative_inf=negative_inf,
layer_index=layer_index,
max_relative_position=max_relative_position,
)
self.dropout = nn.Dropout(dropout_on_attn)
self.pos_ff = PositionwiseFF(
input_dim=input_dim,
ffn_dim=ffn_dim,
dropout_on_fc1=dropout_on_fc1,
dropout_on_fc2=dropout_on_fc2,
activation_fn=activation_fn,
)
self.layer_norm_pre = Fp32LayerNorm(input_dim)
self.layer_norm = Fp32LayerNorm(input_dim)
self.segment_size = segment_size
self.use_mem = use_mem
self.memory_op = SummarizationLayer(
summarization_method, segment_size, input_dim
)
def set_mini_batches(self, mini_batches):
self.attention.mini_batches = mini_batches
def gen_summary_queries(self, input):
sum_input = self.memory_op(input)
return sum_input
def pre_attention_ops(self, input, right_context_blocks):
rc_length = right_context_blocks.size(0)
input_length = input.size(0)
rc_and_input = torch.cat([right_context_blocks, input], dim=0)
residual_input = rc_and_input
rc_and_input = self.layer_norm_pre(rc_and_input)
query_input = rc_and_input[-input_length:, :, :]
return rc_length, input_length, residual_input, query_input, rc_and_input
def after_attention_ops(self, attention_output, residual_input):
output = self.dropout(attention_output)
output = output + residual_input
output = self.pos_ff(output)
output = self.layer_norm(output)
return output
@torch.jit.export
def forward_jit(
self,
input: Tensor,
lengths: Tensor,
mems: Tensor,
left_context_key: Tensor,
left_context_val: Tensor,
right_context_blocks: Tensor,
rpe: Optional[Tensor],
) -> Tuple[Tensor, Tensor, Tensor, Tensor, Tensor]:
results = self.pre_attention_ops(input, right_context_blocks)
rc_length, input_length, residual_input, query_input, rc_and_input = results
# In online decoding, the summary query size is always 1 or 0
if self.use_mem:
summary_query = self.gen_summary_queries(query_input)
summary_query = summary_query[0:1, :, :]
rc_qu_su = torch.cat([rc_and_input, summary_query], dim=0)
else:
rc_qu_su = rc_and_input
rc_output, next_m, next_k, next_v = self.attention.forward_jit(
input=rc_qu_su,
lengths=lengths,
mems=mems,
left_context_key=left_context_key,
left_context_val=left_context_val,
rpe=rpe,
)
rc_output = self.after_attention_ops(rc_output, residual_input)
results = (
rc_output[-input_length:, :, :],
next_m,
rc_output[0:rc_length, :, :],
next_k,
next_v,
)
return results
@torch.jit.unused
def forward(
self,
input,
lengths,
mems,
right_context_blocks,
attention_mask,
pre_mems,
left_context_key,
left_context_val,
rpe,
):
results = self.pre_attention_ops(input, right_context_blocks)
rc_length, input_length, residual_input, query_input, rc_and_input = results
if self.use_mem:
summary_query = self.gen_summary_queries(query_input)
rc_qu_su = torch.cat([rc_and_input, summary_query], dim=0)
else:
rc_qu_su = rc_and_input
rc_output, next_m, next_k, next_v = self.attention(
input=rc_qu_su,
lengths=lengths,
mems=mems,
attention_mask=attention_mask,
pre_mems=pre_mems,
left_context_key=left_context_key,
left_context_val=left_context_val,
rpe=rpe,
)
# [TODO] Note memory did not go through pos_ff. What happen if we pass
# memory through the pos_ff as well?
rc_output = self.after_attention_ops(rc_output, residual_input)
results = (
rc_output[-input_length:, :, :],
next_m,
rc_output[0:rc_length, :, :],
next_k,
next_v,
)
return results
class NoSegAugmentedMemoryTransformerEncoderLayer(FairseqEncoder):
"""
Whole utterance augmented memory transformer encoder layer. This is a master layer
where we can define multiple augmented memory transformers. There are two reasons
to setup the master layer.
1. We only need to define once about the attention mask. All the layers in the master
layer share the same mask.
2. pyspeech nn layer has special input and output format. Defining one master layer is
easier to passing memory between different layes inside the master layer
args:
input_dim: input embedding dimension
num_heads: number of heads in multihead self-attention
ffn_dim: ffn dimension in FFN layer
num_layers: number of augmented memory transformer layers
dropout_in_attn: dropout used in multi-head self-attention
dropout_on_attn: dropout used for output from te multihead self-attention
dropout_on_fc1: dropout used in FFN layer for the first linear layer
dropout_on_fc2: dropout used in FFN layer for the second linear layer
segment_size: segment size for each segment
context_config: (left_context_size, right_context_size) defines the surround context size
for each segment
max_memory_size: maximum memory size used for each segment
scaled_init: whether use scaled init for weight initialization in attention layer
std_scale: if std_scale is not None. The weak attention suppression is
turned on. For std_scale = 0.5, all the attention smaller than
mean + 0.5 * std will be suppressed.
activation_fn: activation function used in FFN layer. [ReLU, GELU] supported
tanh_on_mem: whether use tanh on memory
mini_batches: use mini-btach training
negative_inf: the negative infinity value used in attention masking. default is "-inf".
For some situation, e.g. LM. it is better to use "-1e8" to avoid nan issue.
summarization_method: method to generate segment summrization embedding
max_relative_position: max relatie position for relative position embedding
rpe_old_option: To be compatible with previous model. The previous model
was trained with attention += attention + rpe. The correct equation
should be attention = attention + rpe
[TODO]: remove the rpe_old_option by the end of 2021 Q1.
"""
def __init__(
self,
input_dim,
num_heads,
ffn_dim,
num_layers=1,
dropout_in_attn=0.0,
dropout_on_attn=0.0,
dropout_on_fc1=0.0,
dropout_on_fc2=0.0,
segment_size=128,
context_config=(0, 0),
max_memory_size=0,
scaled_init=True,
std_scale=None,
activation_fn="relu",
tanh_on_mem=False,
mini_batches=False,
negative_inf="-inf",
deep_init=True,
summarization_method="mean",
max_relative_position=0,
rpe_old_option=True,
):
super().__init__(None)
if input_dim % num_heads:
raise ValueError(
"input_dim ({}) must be divisible by num_heads ({})".format(
input_dim, num_heads
)
)
# we used to support growing memory size. However, it will cause
# cross stream batching failure. Now we need to have exact max memory size
if max_memory_size < 0:
raise ValueError("max_memory_size must be >= 0")
# Only assign right_context. In decoding, left context will be cached.
# No need to let the online decoder to re-assign the left context
self.left_context, self.right_context = context_config
self.segment_size = segment_size
self.memory_dim = input_dim
self.max_memory_size = max_memory_size
self.mini_batches = mini_batches
if self.max_memory_size != 0:
self.use_mem = True
else:
self.use_mem = False
self.memory_op = SummarizationLayer(
summarization_method, segment_size, input_dim
)
self.layers = torch.nn.ModuleList()
self.num_layers = num_layers
self.max_relative_position = max_relative_position
if self.max_relative_position > 0:
self.use_rpe = True
else:
self.use_rpe = False
for i in range(self.num_layers):
if deep_init:
layer_index = i
else:
layer_index = -1
self.layers.append(
NoSegAugmentedMemoryTransformer(
num_heads=num_heads,
input_dim=input_dim,
ffn_dim=ffn_dim,
dropout_in_attn=dropout_in_attn,
dropout_on_attn=dropout_on_attn,
dropout_on_fc1=dropout_on_fc1,
dropout_on_fc2=dropout_on_fc2,
segment_size=segment_size,
std_scale=std_scale,
activation_fn=activation_fn,
tanh_on_mem=tanh_on_mem,
scaled_init=scaled_init,
use_mem=self.use_mem,
mini_batches=mini_batches,
negative_inf=negative_inf,
layer_index=layer_index,
summarization_method=summarization_method,
max_relative_position=max_relative_position,
rpe_old_option=rpe_old_option,
)
)
def set_mini_batches(self, mini_batches):
# handy function only used for unit test
self.mini_batches = mini_batches
for layer in self.layers:
layer.set_mini_batches(mini_batches)
def _get_relative_position(
self,
input: Tensor,
max_relative_position: int,
left_context_length: int,
past_length: int,
is_decoding: bool,
):
# For training, we copy the right context to the start of the utterance
# First dimension in distance is corresponding to query.
# [right context, utterance, summary vector]
# Second dimension in distance is corresponding to key.
# [Memory bank, right context, utterance]
# For summary vector in query part, the distance with
# all other position is 2*max_position. For memory bank in key,
# the distance with all other positions is 0.
T, B, D = input.shape
num_segs = math.ceil((T - self.right_context) / self.segment_size)
# utterance
u_st = past_length * self.segment_size
u_ed = u_st + T
utterance_ranges = torch.arange(u_st, u_ed - self.right_context)
# left context. Only in minibatch or decoding
left_context_ranges = torch.arange(u_st - left_context_length, u_st)
# Right context block
# right context + utterance
right_context_blocks = []
for i in range(0, num_segs - 1):
st = (i + 1) * self.segment_size + u_st
ed = st + self.right_context
assert ed < u_ed
temp = torch.arange(st, ed)
right_context_blocks.append(temp)
right_context_blocks.append(torch.arange(u_ed - self.right_context, u_ed))
right_context_ranges = torch.cat(right_context_blocks)
if self.use_mem:
# Memory bank
# The position for memory -n, .., -1
if is_decoding:
memory_size = min(past_length, self.max_memory_size)
else:
memory_size = num_segs + past_length - 1
memory_bank_ranges = torch.arange(
-max_relative_position - 1, -max_relative_position - 1 - memory_size, -1
)
# summary vector
# The position for summary vector as the T+max_relative_position+1.
# After the clamping, the relative position is max_relative_position
summary_pos_st = u_ed + max_relative_position + 1
summary_vector_ranges = torch.arange(
summary_pos_st, summary_pos_st + num_segs
)
key_ranges = torch.cat(
[
memory_bank_ranges,
right_context_ranges,
left_context_ranges,
utterance_ranges,
]
)
query_ranges = torch.cat(
[right_context_ranges, utterance_ranges, summary_vector_ranges]
)
else:
key_ranges = torch.cat(
[right_context_ranges, left_context_ranges, utterance_ranges]
)
query_ranges = torch.cat([right_context_ranges, utterance_ranges])
distance = key_ranges[None, :] - query_ranges[:, None]
distance_clamp = (
torch.clamp(distance, -max_relative_position, max_relative_position)
+ max_relative_position
)
distance_clamp = distance_clamp.to(input.device).long().detach()
return distance_clamp
def _get_attention_mask(self, input, past_length=0, left_context_cache=0):
# attention mask for each query contains three parts:
# 1. memory part
# 2. left_context + segment
# 3. right_context_block
# so for each segment and its correspoinding right context block,
# the attention matrix is formed by 9 parts:
# [0, m, 0, 0, right_context, 0, 0, seg, 0]
# [before memory, memory, after memory, before right context, right_context,
# after right context, before seg, seg, after seg]
#
# Query is formed in the way as [right_context_blocks, utterance, summary]
#
# Note: put m and right_context before segment is convenient
# for padding_mask operation.
# Key lengths = m_length + right_context_block_length + lengths
utterance_length, batch_size, _ = input.shape
summary_length = math.ceil(utterance_length / self.segment_size)
num_segs = summary_length
rc_length = self.right_context * num_segs
rc = self.right_context
lc = self.left_context
# using mini-batches, there is left context cache available for current
# sequence.
lcc = left_context_cache
# max_memory_size is 0 then we don't have memory and summary
# past_length is the memory carry from previous sequence
if self.use_mem:
mem_length = num_segs - 1 + past_length
else:
mem_length = 0
rc_mask = []
query_mask = []
summary_mask = []
for j in range(0, num_segs):
ssize = min(self.segment_size, utterance_length - j * self.segment_size)
rc_size = rc
rc_mat = []
q_mat = []
s_mat = []
m_start = max(j + past_length - self.max_memory_size, 0)
# max_memory_size is 0, then we don't use memory
if self.use_mem:
# part 0: before memory
rc_mat.append(input.new_zeros(rc_size, m_start))
q_mat.append(input.new_zeros(ssize, m_start))
s_mat.append(input.new_zeros(1, m_start))
# part 1: memory
col_1 = j + past_length - m_start
rc_mat.append(torch.ones(rc_size, col_1, device=input.device))
q_mat.append(torch.ones(ssize, col_1, device=input.device))
# based on D22875746, disable summary query attention
# on memeory is better for long form utterance
s_mat.append(input.new_zeros(1, col_1))
# part 2: after memory
col_2 = mem_length - (j + past_length)
rc_mat.append(input.new_zeros(rc_size, col_2))
q_mat.append(input.new_zeros(ssize, col_2))
s_mat.append(input.new_zeros(1, col_2))
# part 3: before right context
rc_start = j * rc
rc_mat.append(input.new_zeros(rc_size, rc_start))
q_mat.append(input.new_zeros(ssize, rc_start))
s_mat.append(input.new_zeros(1, rc_start))
# part 4: right context
rc_end = rc_start + rc
col_4 = rc
rc_mat.append(torch.ones(rc_size, col_4, device=input.device))
q_mat.append(torch.ones(ssize, col_4, device=input.device))
s_mat.append(torch.ones(1, col_4, device=input.device))
# part 5: after right context
col_5 = rc_length - rc_end
rc_mat.append(input.new_zeros(rc_size, col_5))
q_mat.append(input.new_zeros(ssize, col_5))
s_mat.append(input.new_zeros(1, col_5))
# part 6: before query segment
seg_start = max(j * self.segment_size + lcc - lc, 0)
rc_mat.append(input.new_zeros(rc_size, seg_start))
q_mat.append(input.new_zeros(ssize, seg_start))
s_mat.append(input.new_zeros(1, seg_start))
# part 7: query segment
# note: right context is put in right context block
# here we only need to consider about left context
seg_end = min((j + 1) * self.segment_size + lcc, utterance_length + lcc)
col_7 = seg_end - seg_start
rc_mat.append(torch.ones(rc_size, col_7, device=input.device))
q_mat.append(torch.ones(ssize, col_7, device=input.device))
s_mat.append(torch.ones(1, col_7, device=input.device))
# part 8: after query segment
col_8 = utterance_length + lcc - seg_end
rc_mat.append(input.new_zeros(rc_size, col_8))
q_mat.append(input.new_zeros(ssize, col_8))
s_mat.append(input.new_zeros(1, col_8))
rc_mask.append(torch.cat(rc_mat, dim=1))
query_mask.append(torch.cat(q_mat, dim=1))
summary_mask.append(torch.cat(s_mat, dim=1))
# no memory, then we don't need summary either
if self.use_mem:
attention_mask = (
1
- torch.cat(
[
torch.cat(rc_mask, dim=0),
torch.cat(query_mask, dim=0),
torch.cat(summary_mask, dim=0),
],
dim=0,
)
).to(torch.bool)
else:
attention_mask = (
1
- torch.cat(
[torch.cat(rc_mask, dim=0), torch.cat(query_mask, dim=0)], dim=0
)
).to(torch.bool)
return attention_mask
@torch.jit.export
def init_state(
self, batch_size: int, device: Optional[Device] = None
) -> List[Tensor]:
empty_memory = torch.zeros(
self.num_layers,
self.max_memory_size,
batch_size,
self.memory_dim,
device=device,
)
left_context_key = torch.zeros(
self.num_layers,
self.left_context,
batch_size,
self.memory_dim,
device=device,
)
left_context_val = torch.zeros(
self.num_layers,
self.left_context,
batch_size,
self.memory_dim,
device=device,
)
past_length = torch.zeros(1, batch_size, dtype=torch.int32, device=device)
return [empty_memory, left_context_key, left_context_val, past_length]
@torch.jit.export
def batch_state(self, states: List[List[Tensor]]) -> List[Tensor]:
if len(states) == 0:
return []
batched_m = []
batched_lc_key = []
batched_lc_val = []
batched_past_length = []
for state in states:
if len(state) == 0:
continue
m, lc_key, lc_val, past_length = state
batched_m.append(m)
batched_lc_key.append(lc_key)
batched_lc_val.append(lc_val)
batched_past_length.append(past_length)
if (
(len(batched_m) == 0)
or (len(batched_lc_key) == 0)
or (len(batched_lc_val) == 0)
or (len(batched_past_length) == 0)
):
return [
torch.tensor([]),
torch.tensor([]),
torch.tensor([]),
torch.tensor([]),
]
batched_m = torch.cat(batched_m, dim=2)
batched_lc_key = torch.cat(batched_lc_key, dim=2)
batched_lc_val = torch.cat(batched_lc_val, dim=2)
batched_past_length = torch.cat(batched_past_length, dim=1)
return [batched_m, batched_lc_key, batched_lc_val, batched_past_length]
@torch.jit.export
def reorder_state(self, state: List[Tensor], indices: Tensor) -> List[Tensor]:
if len(state) == 0:
return []
m, lc_key, lc_val, past_length = state
indices = indices.to(device=m.device)
reord_m = torch.index_select(m, 2, indices)
reord_lc_key = torch.index_select(lc_key, 2, indices)
reord_lc_val = torch.index_select(lc_val, 2, indices)
reord_past_length = torch.index_select(past_length, 1, indices)
return [reord_m, reord_lc_key, reord_lc_val, reord_past_length]
@torch.jit.export
def reset_state(self, state: List[Tensor], indices: Tensor) -> List[Tensor]:
m, lc_key, lc_val, past_length = state
m = m.index_fill(dim=2, index=indices, value=0.0)
lc_key = lc_key.index_fill(dim=2, index=indices, value=0.0)
lc_val = lc_val.index_fill(dim=2, index=indices, value=0.0)
past_length = past_length.index_fill(dim=1, index=indices, value=0)
return [m, lc_key, lc_val, past_length]
@torch.jit.export
def state_size(self) -> int:
return 4
@torch.jit.export
def batch_size_in_state(
self, state: Optional[List[Tensor]], sloppy: bool = True
) -> Optional[int]:
if state is None:
return None
return state[0].size(2)
def gen_summary_queries(self, input):
sum_input = self.memory_op(input)
return sum_input
def _gen_right_context_padded_input(self, input):
# This function deals with input that is already
# padded with right context (e.g. minibatch training)
right_context_blocks = []
T, B, D = input.shape
num_segs = math.ceil((T - self.right_context) / self.segment_size)
for i in range(0, num_segs - 1):
st = (i + 1) * self.segment_size
ed = st + self.right_context
assert ed < T
temp = input[st:ed, :, :]
right_context_blocks.append(temp)
# last segment right context is already available
right_context_blocks.append(input[T - self.right_context :, :, :])
return torch.cat(right_context_blocks, dim=0)
def _gen_segs_right_context(self, input, lengths):
segments = []
T, B, D = input.size()
nT = T - self.right_context
# assume input is right context padded
num_segs = math.ceil(nT / self.segment_size)
# pad zeros to the utterance to make sure each
# segment has the same right context. For the
for i in range(0, num_segs - 1):
st = i * self.segment_size
ed = min(T, st + self.segment_size + self.right_context)
temp = input[st:ed, :, :]
rest_lengths = torch.clamp(
lengths - self.segment_size, min=0, max=nT - (i + 1) * self.segment_size
)
segments.append((temp, lengths - rest_lengths + self.right_context))
lengths = rest_lengths
last_seg = input[st + self.segment_size :, :, :]
segments.append((last_seg, rest_lengths + self.right_context))
return segments
@torch.jit.unused
def forward(
self, input: Tensor, padding_masks: Tensor, state: Optional[List[Tensor]] = None
) -> Tuple[Tensor, Tensor, List[Tensor], List[Tensor]]:
# Xutai: originally the second argument is lengths.
lengths = (~padding_masks).sum(dim=1).long()
# mini batch training.
if self.mini_batches:
return self.forward_mini_batches(input, lengths, state)
# regular full sequence training. Note, assume the right context in provided
# in the input.
T, B, D = input.size()
right_context_blocks = self._gen_right_context_padded_input(input)
# generate the relative positional embedding
if self.use_rpe:
rpe = self._get_relative_position(
input=input,
max_relative_position=self.max_relative_position,
left_context_length=0,
past_length=0,
is_decoding=False,
)
else:
rpe = None
input = input[: T - self.right_context, :, :]
attention_mask = self._get_attention_mask(input)
# firt layer use each segment mean as memory
# ignore the last one seg average
if self.use_mem:
mems = self.gen_summary_queries(input)[:-1, :, :]
else:
mems = torch.zeros(0, input.size(1), input.size(2), device=input.device)
mems = mems.type_as(input)
output = input
all_outputs = []
for layer in self.layers:
output, mems, right_context_blocks, _, _ = layer(
input=output,
lengths=lengths,
attention_mask=attention_mask,
mems=mems,
right_context_blocks=right_context_blocks,
pre_mems=None,
left_context_key=None,
left_context_val=None,
rpe=rpe,
)
all_outputs.append(output)
return output, padding_masks, [], all_outputs
def forward_jit_mini_batch_init(
self,
seg: Tensor,
state: Optional[List[Tensor]] = None,
is_decoding: bool = False,
):
# Prepare state. In whole sequence training, state is ignored.
# For minibatch training, we need to prepare state
if state is None:
state = self.init_state(batch_size=seg.size(1), device=seg.device)
if seg.dtype == torch.half:
state = [state[0].half(), state[1].half(), state[2].half(), state[3]]
if self.use_mem:
# note input average only on seg, not on right context
# first layer use each segmetn mean as memory. the last
# one segment average is used in state
full_mems = self.gen_summary_queries(seg)
if is_decoding:
mems = full_mems[0:1, :, :]
state_mems = torch.cat([state[0][0], mems], dim=0)
else:
mems = full_mems[:-1, :, :]
state_mems = torch.cat([state[0][0], full_mems], dim=0)
else:
mems = state[0][0]
state_mems = mems
# track processed segment number or memory number
# the same batch as the same bumber of past length
past_length = state[3][0][0].item()
past_left_context = min(past_length * self.segment_size, self.left_context)
past_length = min(self.max_memory_size, past_length)
return state, mems, state_mems, past_length, past_left_context
def state_update_before(
self, layer: int, state: List[Tensor], past_length: int, past_left_context: int
):
pre_mems = state[0][layer][self.max_memory_size - past_length :, :, :]
lc_key = state[1][layer][self.left_context - past_left_context :, :, :]
lc_val = state[2][layer][self.left_context - past_left_context :, :, :]
return pre_mems, lc_key, lc_val
def state_update_after(
self,
layer: int,
state: List[Tensor],
mems: Tensor,
next_key: Tensor,
next_val: Tensor,
mems_list: List[Tensor],
lc_key_list: List[Tensor],
lc_val_list: List[Tensor],
):
# mems is used for next layer
if layer < self.num_layers - 1:
state_mems = torch.cat([state[0][layer + 1], mems], dim=0)
mems_list.append(state_mems[-self.max_memory_size :, :, :])
# when mems pass to next sequence, we need the last memory. when mems
# use for the next layer, we can ignore the last memory
mems = mems[:-1, :, :]
# note state[1][i] and state[2][i] original length equals to self.left_context
new_k = torch.cat([state[1][layer], next_key], dim=0)
new_v = torch.cat([state[2][layer], next_val], dim=0)
lc_key_list.append(new_k[-self.left_context :, :, :])
lc_val_list.append(new_v[-self.left_context :, :, :])
return mems_list, lc_key_list, lc_val_list, mems
def state_update_after_loop(
self,
state: List[Tensor],
mems_list: List[Tensor],
lc_key_list: List[Tensor],
lc_val_list: List[Tensor],
update_length: int,
):
state[0] = torch.stack(mems_list, dim=0)
state[1] = torch.stack(lc_key_list, dim=0)
state[2] = torch.stack(lc_val_list, dim=0)
state[3] = state[3] + update_length
return state
@torch.jit.unused
def forward_mini_batches(
self, input: Tensor, lengths: Tensor, state: Optional[List[Tensor]] = None
) -> Tuple[Tensor, Tensor, List[Tensor], List[Tensor]]:
T, B, D = input.size()
# input without right context
seg = input[: T - self.right_context, :, :]
# get right context blocks
right_context_blocks = self._gen_right_context_padded_input(input)
mems_list = []
lc_key_list = []
lc_val_list = []
results = self.forward_jit_mini_batch_init(seg, state, False)
state, mems, state_mems, past_length, past_left_context = results
# relative position embedding
if self.use_rpe:
rpe = self._get_relative_position(
input=input,
max_relative_position=self.max_relative_position,
left_context_length=past_left_context,
past_length=past_length,
is_decoding=False,
)
else:
rpe = None
# get attention mask based on seg (not include right context) and available
# left context
attention_mask = self._get_attention_mask(seg, past_length, past_left_context)
mems_list.append(state_mems[-self.max_memory_size :, :, :])
output = seg
i = 0
all_outputs = []
for layer in self.layers:
# In order to make cross stream batching work, mem, left context key
# and left context value in the state should always be the same shape.
# We use the past length to track the processed segment number. In this
# way, we take out the essential memory, left context key and left
# context val from the state. After finish the forward for current segment
# we add the new memory, left context key and left context value into the
# staate and trim out the oldest part to keep the shape consistent.
pre_mems, lc_key, lc_val = self.state_update_before(
i, state, past_length, past_left_context
)
output, mems, right_context_blocks, next_key, next_val = layer.forward(
input=output,
lengths=lengths,
attention_mask=attention_mask,
mems=mems,
right_context_blocks=right_context_blocks,
pre_mems=pre_mems,
left_context_key=lc_key,
left_context_val=lc_val,
rpe=rpe,
)
all_outputs.append(output)
mems_list, lc_key_list, lc_val_list, mems = self.state_update_after(
layer=i,
state=state,
mems=mems,
next_key=next_key,
next_val=next_val,
mems_list=mems_list,
lc_key_list=lc_key_list,
lc_val_list=lc_val_list,
)
i += 1
# update state
update_length = math.ceil((T - self.right_context) / self.segment_size)
state = self.state_update_after_loop(
state=state,
mems_list=mems_list,
lc_key_list=lc_key_list,
lc_val_list=lc_val_list,
update_length=update_length,
)
return output, lengths, state, all_outputs
def forward_jit_test(
self, input: Tensor, lengths: Tensor, state: Optional[List[Tensor]] = None
) -> Tuple[Tensor, Tensor, List[Tensor]]:
"""
This one simulate sequence encoder forward jit. This is for unit test purpose.
It is not used in training or decoding. Note, extra_right_context is set in
the model. In unit test, input = [utterance, right_context], lengths =
[utterance_length].
args:
input: input utterance
lengths: utterance input length
state: None here. input is whole utterance
"""
# [TODO] sequence_to_segment has bug in lengths.
seg_src_tokens_lengths = self._gen_segs_right_context(input, lengths)
seg_enc_tokens_lengths: List[Tuple[Tensor, Tensor]] = []
state: Optional[List[Tensor]] = None
for seg_src_tokens, seg_src_lengths in seg_src_tokens_lengths:
seg_enc_tokens, seg_enc_lengths, state = self.forward_jit(
input=seg_src_tokens, lengths=seg_src_lengths, state=state
)
seg_enc_tokens_lengths.append((seg_enc_tokens, seg_enc_lengths))
enc_tokens, enc_lengths = segments_to_sequence(
segments=seg_enc_tokens_lengths, time_axis=0
)
state = [] # returns trivial state
return enc_tokens, enc_lengths, state
@torch.jit.export
def forward_jit(
self, input: Tensor, lengths: Tensor, state: Optional[List[Tensor]] = None
) -> Tuple[Tensor, Tensor, List[Tensor]]:
"""
Forward helper for online decoding.
args:
input: [seg, right_context]. We assume in online we
always padding the right context to the preset right context size.
For the last segment, we may have short segment size, but right
context size is the same as other segments
lengths: utterance input length is the utterance segment length and
right context size
state: [memory, left_context_key, left_context_val]. To improve throughput,
in addition to memory, we also cache key and value for left_context in
multihead self-attention
"""
# In online decoding, input = [segment, right_context]
# Lengths = [segment_length, right_context_length]
# so we need strip right context in output
T, B, D = input.size()
rc_str = T - self.right_context
rc_end = T
right_context_blocks = input[rc_str:rc_end, :, :]
seg = input[:rc_str, :, :]
lengths = torch.clamp(lengths - self.right_context, min=0)
mems_list = []
lc_key_list = []
lc_val_list = []
results = self.forward_jit_mini_batch_init(seg, state, True)
state, mems, state_mems, past_length, past_left_context = results
# relative position embedding
if self.use_rpe:
rpe = self._get_relative_position(
input=input,
max_relative_position=self.max_relative_position,
left_context_length=past_left_context,
past_length=past_length,
is_decoding=True,
)
else:
rpe = None
# memory for first layer.
mems_list.append(state_mems[-self.max_memory_size :, :, :])
output = seg
i = 0
for layer in self.layers:
# In order to make cross stream batching work, mem, left context key
# and left context value in the state should always be the same shape.
# We use the past length to track the processed segment number. In this
# way, we take out the essential memory, left context key and left
# context val from the state. After finish the forward for current segment
# we add the new memory, left context key and left context value into the
# staate and trim out the oldest part to keep the shape consistent.
true_mems, lc_key, lc_val = self.state_update_before(
layer=i,
state=state,
past_length=past_length,
past_left_context=past_left_context,
)
output, mems, right_context_blocks, next_key, next_val = layer.forward_jit(
input=output,
lengths=lengths,
mems=true_mems,
right_context_blocks=right_context_blocks,
left_context_key=lc_key,
left_context_val=lc_val,
rpe=rpe,
)
# mems is used for next layer
mems_list, lc_key_list, lc_val_list, _ = self.state_update_after(
layer=i,
state=state,
mems_list=mems_list,
mems=mems,
next_key=next_key,
next_val=next_val,
lc_key_list=lc_key_list,
lc_val_list=lc_val_list,
)
i += 1
# update state
state = self.state_update_after_loop(
state=state,
mems_list=mems_list,
lc_key_list=lc_key_list,
lc_val_list=lc_val_list,
update_length=1,
)
return output, lengths, state
def quantize_(self, params=None):
if params and "per_channel" in params and params["per_channel"]:
qconfig = per_channel_dynamic_qconfig
else:
qconfig = default_dynamic_qconfig
quantization.quantize_dynamic(
self, {torch.nn.Linear: qconfig}, dtype=torch.qint8, inplace=True
)
return self
# ------------------------------------------------------------------------------
# Emformer encoder for seq2seq model
# This is a wrapper over the original emformer
# ------------------------------------------------------------------------------
def emformer_encoder(klass):
class SpeechEncoder(klass):
def __init__(self, args):
super().__init__(args)
stride = SpeechEncoder.conv_layer_stride(args)
trf_left_context = args.segment_left_context // stride
trf_right_context = args.segment_right_context // stride
context_config = [trf_left_context, trf_right_context]
self.transformer_layers = nn.ModuleList(
[
NoSegAugmentedMemoryTransformerEncoderLayer(
input_dim=args.encoder_embed_dim,
num_heads=args.encoder_attention_heads,
ffn_dim=args.encoder_ffn_embed_dim,
num_layers=args.encoder_layers,
dropout_in_attn=args.dropout,
dropout_on_attn=args.dropout,
dropout_on_fc1=args.dropout,
dropout_on_fc2=args.dropout,
activation_fn=args.activation_fn,
context_config=context_config,
segment_size=args.segment_length,
max_memory_size=args.max_memory_size,
scaled_init=True, # TODO: use constant for now.
tanh_on_mem=args.amtrf_tanh_on_mem,
)
]
)
def forward(self, src_tokens, src_lengths):
encoder_out = super().forward(src_tokens, src_lengths)
output = encoder_out["encoder_out"][0]
encoder_padding_masks = encoder_out["encoder_padding_mask"][0]
# This is because that in the original implementation
# the output didn't consider the last segment as right context.
encoder_padding_masks = encoder_padding_masks[:, : output.size(0)]
return {
"encoder_out": [output],
"encoder_padding_mask": [encoder_padding_masks],
"encoder_embedding": [],
"encoder_states": [],
"src_tokens": [],
"src_lengths": [],
}
@staticmethod
def conv_layer_stride(args):
# TODO: make it configurable from the args
return 4
SpeechEncoder.__name__ = klass.__name__
return SpeechEncoder
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/speech_to_text/modules/emformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Tuple, List
import torch
import torch.nn.functional as F
from fairseq.models import FairseqEncoder
from fairseq.models.speech_to_text import (
ConvTransformerEncoder,
)
from fairseq.models.speech_to_text.utils import attention_suppression
from fairseq.models.speech_to_text.utils import (
lengths_to_encoder_padding_mask,
segments_to_sequence,
sequence_to_segments,
)
from fairseq.modules import MultiheadAttention, TransformerEncoderLayer
from torch import nn, Tensor
# ------------------------------------------------------------------------------
# AugmentedMemoryConvTransformerEncoder
# ------------------------------------------------------------------------------
class AugmentedMemoryConvTransformerEncoder(ConvTransformerEncoder):
def __init__(self, args):
super().__init__(args)
args.encoder_stride = self.stride()
self.left_context = args.left_context // args.encoder_stride
self.right_context = args.right_context // args.encoder_stride
self.left_context_after_stride = args.left_context // args.encoder_stride
self.right_context_after_stride = args.right_context // args.encoder_stride
self.transformer_layers = nn.ModuleList([])
self.transformer_layers.extend(
[
AugmentedMemoryTransformerEncoderLayer(args)
for i in range(args.encoder_layers)
]
)
def stride(self):
# Hard coded here. Should infer from convs in future
stride = 4
return stride
def forward(self, src_tokens, src_lengths, states=None):
"""Encode input sequence.
:param torch.Tensor xs: input tensor
:param torch.Tensor masks: input mask
:return: position embedded tensor and mask
:rtype Tuple[torch.Tensor, torch.Tensor]:
"""
bsz, max_seq_len, _ = src_tokens.size()
x = (
src_tokens.view(bsz, max_seq_len, self.in_channels, self.input_dim)
.transpose(1, 2)
.contiguous()
)
x = self.conv(x)
bsz, _, output_seq_len, _ = x.size()
x = x.transpose(1, 2).transpose(0, 1).contiguous().view(output_seq_len, bsz, -1)
x = self.out(x)
x = self.embed_scale * x
subsampling_factor = 1.0 * max_seq_len / output_seq_len
input_lengths = torch.max(
(src_lengths.float() / subsampling_factor).ceil().long(),
x.size(0) * src_lengths.new_ones([src_lengths.size(0)]).long(),
)
encoder_padding_mask, _ = lengths_to_encoder_padding_mask(
input_lengths, batch_first=True
)
# TODO: fix positional embedding
positions = self.embed_positions(encoder_padding_mask).transpose(0, 1)
x += positions
x = F.dropout(x, p=self.dropout, training=self.training)
# State to store memory banks etc.
if states is None:
states = [
{"memory_banks": None, "encoder_states": None}
for i in range(len(self.transformer_layers))
]
for i, layer in enumerate(self.transformer_layers):
# x size:
# (self.left_size + self.segment_size + self.right_size)
# / self.stride, num_heads, dim
# TODO: Consider mask here
x = layer(x, states[i])
states[i]["encoder_states"] = x[
self.left_context_after_stride : -self.right_context_after_stride
]
lengths = (
(
~encoder_padding_mask[
:, self.left_context_after_stride : -self.right_context_after_stride
]
)
.sum(dim=1, keepdim=True)
.long()
)
return states[-1]["encoder_states"], lengths, states
# ------------------------------------------------------------------------------
# AugmentedMemoryTransformerEncoderLayer
# ------------------------------------------------------------------------------
class AugmentedMemoryTransformerEncoderLayer(TransformerEncoderLayer):
def __init__(self, args):
super().__init__(args)
self.left_context = args.left_context // args.encoder_stride
self.right_context = args.right_context // args.encoder_stride
def forward(self, x, state):
length, batch_size, x_dim = x.size()
residual = x
if self.normalize_before:
x = self.self_attn_layer_norm(x)
# init_state
if state.get("memory_banks", None) is None:
state["memory_banks"] = []
# TODO reseach new sum_query method
seg_start = self.left_context
seg_end = length - self.right_context
if seg_start < seg_end:
summarization_query = torch.mean(x[seg_start:seg_end], keepdim=True, dim=0)
else:
summarization_query = x.new_zeros(1, batch_size, x_dim)
x = torch.cat([x, summarization_query], dim=0)
x = self.self_attn(input_and_summary=x, state=state)
x = self.dropout_module(x)
x = residual + x
if not self.normalize_before:
x = self.self_attn_layer_norm(x)
residual = x
if self.normalize_before:
x = self.final_layer_norm(x)
x = self.activation_fn(self.fc1(x))
x = self.activation_dropout_module(x)
x = self.fc2(x)
x = self.dropout_module(x)
x = residual + x
if not self.normalize_before:
x = self.final_layer_norm(x)
return x
def build_self_attention(self, embed_dim, args):
return AugmentedMemoryMultiheadAttention(
embed_dim=embed_dim,
num_heads=args.encoder_attention_heads,
dropout=args.attention_dropout,
self_attention=True,
q_noise=self.quant_noise,
qn_block_size=self.quant_noise_block_size,
tanh_on_mem=True,
max_memory_size=args.max_memory_size,
)
# ------------------------------------------------------------------------------
# AugmentedMemoryMultiheadAttention
# ------------------------------------------------------------------------------
class AugmentedMemoryMultiheadAttention(MultiheadAttention):
"""
Augmented Memory Attention from
Streaming Transformer-based Acoustic Models
Using Self-attention with Augmented Memory
https://arxiv.org/abs/2005.08042
"""
def __init__(
self,
embed_dim,
num_heads,
kdim=None,
vdim=None,
dropout=0.0,
bias=True,
add_bias_kv=False,
add_zero_attn=False,
self_attention=False,
encoder_decoder_attention=False,
q_noise=0.0,
qn_block_size=8,
tanh_on_mem=False,
memory_dim=None,
std_scale=0.5, # 0.5 based on https://arxiv.org/abs/2005.09137
max_memory_size=-1,
disable_mem_on_mem_attn=True,
):
super().__init__(
embed_dim,
num_heads,
kdim,
vdim,
dropout,
bias,
add_bias_kv,
add_zero_attn,
self_attention,
encoder_decoder_attention,
q_noise,
qn_block_size,
)
self.memory_dim = memory_dim if memory_dim is not None else embed_dim
self.std_scale = std_scale
self.disable_mem_on_mem_attn = disable_mem_on_mem_attn
# This Operator was used for factorization in PySpeech
self.v2e = lambda x: x
if tanh_on_mem:
self.squash_mem = torch.tanh
self.nonlinear_squash_mem = True
else:
self.squash_mem = lambda x: x
self.nonlinear_squash_mem = False
self.max_memory_size = max_memory_size
def forward(self, input_and_summary, state):
"""
input: Encoder states of current segment with left or right context,
plus one summarization query
"""
length, batch_size, _ = input_and_summary.shape
length = length - 1 # not include sum_query, last index
memory = state["memory_banks"]
# TODO: positional embedding on memory
if self.max_memory_size > -1 and len(memory) > self.max_memory_size:
# TODO: need to fix here
if self.max_memory_size == 0:
memory = memory.new_zeros(1, memory.size(1), self.memory_dim)
else:
memory = memory[-self.max_memory_size :]
memory_and_input = torch.cat(memory + [input_and_summary[:-1]], dim=0)
input_and_sum_query = input_and_summary
q = self.q_proj(self.v2e(input_and_sum_query))
k = self.k_proj(self.v2e(memory_and_input))
v = self.v_proj(self.v2e(memory_and_input))
q = (
q.contiguous()
.view(-1, batch_size * self.num_heads, self.head_dim)
.transpose(0, 1)
* self.scaling
)
k = (
k.contiguous()
.view(-1, batch_size * self.num_heads, self.head_dim)
.transpose(0, 1)
)
v = (
v.contiguous()
.view(-1, batch_size * self.num_heads, self.head_dim)
.transpose(0, 1)
)
attention_weights = torch.bmm(q, k.transpose(1, 2))
if self.disable_mem_on_mem_attn:
attention_weights = self.suppress_mem_on_mem_attention(
batch_size, self.num_heads, len(memory), attention_weights
)
if self.std_scale is not None:
attention_weights = attention_suppression(attention_weights, self.std_scale)
assert list(attention_weights.shape) == [
batch_size * self.num_heads,
length + 1,
length + len(memory),
]
attention_weights = torch.nn.functional.softmax(
attention_weights.float(), dim=-1
).type_as(attention_weights)
attention_probs = self.dropout_module(attention_weights)
# [T, T, B, n_head] + [T, B, n_head, d_head] -> [T, B, n_head, d_head]
attention = torch.bmm(attention_probs, v)
assert list(attention.shape) == [
batch_size * self.num_heads,
length + 1,
self.head_dim,
]
attention = (
attention.transpose(0, 1)
.contiguous()
.view(length + 1, batch_size, self.embed_dim)
)
output_and_memory = self.out_proj(attention)
next_m = output_and_memory[-1:]
next_m = self.squash_mem(next_m)
output = output_and_memory[:-1]
state["memory_banks"].append(next_m)
return output
def suppress_mem_on_mem_attention(
self, B: int, num_heads: int, mem_size: int, attention_weight: Tensor
):
"""
Arguments:
- B: batch size
- num_heads: number of attention heads
- mem_size: size of memory bank
- attention_weight: a [B*num_heads, T + 1, T + mem_size] vector
Return:
modified attention_weight with [B*num_heads, -1, :mem_size] = -inf
"""
attention_weight[:, -1, :mem_size] = float("-inf")
return attention_weight
# ------------------------------------------------------------------------------
# SequenceEncoder
# ------------------------------------------------------------------------------
class SequenceEncoder(FairseqEncoder):
"""
SequenceEncoder encodes sequences.
More specifically, `src_tokens` and `src_lengths` in `forward()` should
describe a batch of "complete" sequences rather than segments.
Segment-by-segment inference can be triggered by `segment_size`:
1) `segment_size` is None:
SequenceEncoder treats the input sequence as one single segment.
2) `segment_size` is not None (some int instead):
SequenceEncoder does the following:
1. breaks the input sequence into several segments
2. inference on each segment and collect the outputs
3. concatanete segment outputs into the output sequence.
Note that `segment_size` here shouldn't include additional left/right
contexts needed, for example if we wish to infer with LC-BLSTM where the
middle chunk size is 100 and right context is 20, `segment_size` should be
100.
"""
def __init__(self, args, module):
super().__init__(None)
self.module = module
self.input_time_axis = 1
self.output_time_axis = 0
self.segment_size = args.segment_size
self.left_context = args.left_context
self.right_context = args.right_context
def forward(
self,
src_tokens: Tensor,
src_lengths: Tensor,
states=None,
):
seg_src_tokens_lengths = sequence_to_segments(
sequence=src_tokens,
time_axis=self.input_time_axis,
lengths=src_lengths,
segment_size=self.segment_size,
extra_left_context=self.left_context,
extra_right_context=self.right_context,
)
seg_encoder_states_lengths: List[Tuple[Tensor, Tensor]] = []
for seg_src_tokens, seg_src_lengths in seg_src_tokens_lengths:
(seg_encoder_states, seg_enc_lengths, states) = self.module(
seg_src_tokens,
seg_src_lengths,
states=states,
)
seg_encoder_states_lengths.append((seg_encoder_states, seg_enc_lengths))
encoder_out, enc_lengths = segments_to_sequence(
segments=seg_encoder_states_lengths, time_axis=self.output_time_axis
)
encoder_padding_mask, _ = lengths_to_encoder_padding_mask(
enc_lengths, batch_first=True
)
if not encoder_padding_mask.any():
encoder_padding_mask = None
return {
"encoder_out": [encoder_out],
"encoder_padding_mask": [encoder_padding_mask],
"encoder_embedding": [],
"encoder_states": [states],
"src_tokens": [],
"src_lengths": [],
}
def incremental_encode(
self,
seg_src_tokens: Tensor,
seg_src_lengths: Tensor,
states=None,
):
"""
Different from forward function, this function takes segmented speech
as input, and append encoder states to previous states
"""
(seg_encoder_states, seg_enc_lengths, states) = self.module(
seg_src_tokens,
seg_src_lengths,
states=states,
)
return seg_encoder_states, seg_enc_lengths, states
# ------------------------------------------------------------------------------
# Augmented memory model decorator
# ------------------------------------------------------------------------------
def augmented_memory(klass):
class StreamSeq2SeqModel(klass):
@staticmethod
def add_args(parser):
super(StreamSeq2SeqModel, StreamSeq2SeqModel).add_args(parser)
parser.add_argument(
"--segment-size", type=int, required=True, help="Length of the segment."
)
parser.add_argument(
"--left-context",
type=int,
default=0,
help="Left context for the segment.",
)
parser.add_argument(
"--right-context",
type=int,
default=0,
help="Right context for the segment.",
)
parser.add_argument(
"--max-memory-size",
type=int,
default=-1,
help="Right context for the segment.",
)
StreamSeq2SeqModel.__name__ = klass.__name__
return StreamSeq2SeqModel
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/speech_to_text/modules/augmented_memory_attention.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .hubert import * # noqa
from .hubert_asr import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/hubert/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import contextlib
from argparse import Namespace
from typing import Any
import torch
import torch.nn as nn
from dataclasses import dataclass, field
from fairseq import checkpoint_utils, tasks, utils
from fairseq.dataclass import FairseqDataclass
from fairseq.dataclass.utils import convert_namespace_to_omegaconf
from fairseq.models import BaseFairseqModel, FairseqEncoder, register_model
from fairseq.models.hubert.hubert import MASKING_DISTRIBUTION_CHOICES
from fairseq.tasks import FairseqTask
from omegaconf import II, MISSING
@dataclass
class HubertAsrConfig(FairseqDataclass):
w2v_path: str = field(default=MISSING, metadata={"help": "path to hubert model"})
no_pretrained_weights: bool = field(
default=False,
metadata={"help": "if true, does not load pretrained weights"},
)
dropout_input: float = field(
default=0.0,
metadata={"help": "dropout to apply to the input (after feat extr)"},
)
final_dropout: float = field(
default=0.0,
metadata={"help": "dropout after transformer and before final projection"},
)
dropout: float = field(
default=0.0,
metadata={"help": "dropout probability inside hubert model"},
)
attention_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability for attention weights " "inside hubert model"
},
)
activation_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability after activation in FFN " "inside hubert model"
},
)
# masking
apply_mask: bool = field(
default=False, metadata={"help": "apply masking during fine-tuning"}
)
mask_length: int = field(
default=10, metadata={"help": "repeat the mask indices multiple times"}
)
mask_prob: float = field(
default=0.5,
metadata={
"help": "probability of replacing a token with mask "
"(normalized by length)"
},
)
mask_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static", metadata={"help": "how to choose masks"}
)
mask_other: float = field(
default=0,
metadata={
"help": "secondary mask argument "
"(used for more complex distributions), "
"see help in compute_mask_indices"
},
)
no_mask_overlap: bool = field(
default=False, metadata={"help": "whether to allow masks to overlap"}
)
# channel masking
mask_channel_length: int = field(
default=10,
metadata={"help": "length of the mask for features (channels)"},
)
mask_channel_prob: float = field(
default=0.0,
metadata={"help": "probability of replacing a feature with 0"},
)
mask_channel_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static",
metadata={"help": "how to choose mask length for channel masking"},
)
mask_channel_other: float = field(
default=0,
metadata={
"help": "secondary mask argument "
"(used for more complex distributions), "
"see help in compute_mask_indices"
},
)
no_mask_channel_overlap: bool = field(
default=False,
metadata={"help": "whether to allow channel masks to overlap"},
)
freeze_finetune_updates: int = field(
default=0,
metadata={"help": "dont finetune hubert for this many updates"},
)
feature_grad_mult: float = field(
default=0.0,
metadata={"help": "reset feature grad mult in hubert to this"},
)
layerdrop: float = field(
default=0.0,
metadata={"help": "probability of dropping a layer in hubert"},
)
normalize: bool = II("task.normalize")
data: str = II("task.data")
# this holds the loaded hubert args
w2v_args: Any = None
@dataclass
class HubertCtcConfig(HubertAsrConfig):
pass
@register_model("hubert_ctc", dataclass=HubertCtcConfig)
class HubertCtc(BaseFairseqModel):
def __init__(self, cfg: HubertCtcConfig, w2v_encoder: BaseFairseqModel):
super().__init__()
self.cfg = cfg
self.w2v_encoder = w2v_encoder
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
return state_dict
@classmethod
def build_model(cls, cfg: HubertCtcConfig, task: FairseqTask):
"""Build a new model instance."""
w2v_encoder = HubertEncoder(cfg, task.target_dictionary)
return cls(cfg, w2v_encoder)
def get_normalized_probs(self, net_output, log_probs):
"""Get normalized probabilities (or log probs) from a net's output."""
logits = net_output["encoder_out"]
if log_probs:
return utils.log_softmax(logits.float(), dim=-1)
else:
return utils.softmax(logits.float(), dim=-1)
def get_logits(self, net_output):
logits = net_output["encoder_out"]
padding = net_output["encoder_padding_mask"]
if padding is not None and padding.any():
padding = padding.T
logits[padding][..., 0] = 0
logits[padding][..., 1:] = float("-inf")
return logits
def forward(self, **kwargs):
x = self.w2v_encoder(**kwargs)
return x
@dataclass
class HubertSeq2SeqConfig(HubertAsrConfig):
decoder_embed_dim: int = field(
default=768, metadata={"help": "decoder embedding dimension"}
)
decoder_ffn_embed_dim: int = field(
default=3072, metadata={"help": "decoder embedding dimension for FFN"}
)
decoder_layers: int = field(default=6, metadata={"help": "num of decoder layers"})
decoder_layerdrop: float = field(
default=0.0, metadata={"help": "decoder layerdrop chance"}
)
decoder_attention_heads: int = field(
default=4, metadata={"help": "num decoder attention heads"}
)
decoder_learned_pos: bool = field(
default=False,
metadata={"help": "use learned positional embeddings in the decoder"},
)
decoder_normalize_before: bool = field(
default=False,
metadata={"help": "apply layernorm before each decoder block"},
)
no_token_positional_embeddings: bool = field(
default=False,
metadata={
"help": "if set, disables positional embeddings " "(outside self attention)"
},
)
decoder_dropout: float = field(
default=0.0, metadata={"help": "dropout probability in the decoder"}
)
decoder_attention_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability for attention weights " "inside the decoder"
},
)
decoder_activation_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability after activation in FFN " "inside the decoder"
},
)
max_target_positions: int = field(
default=2048, metadata={"help": "max target positions"}
)
share_decoder_input_output_embed: bool = field(
default=False,
metadata={"help": "share decoder input and output embeddings"},
)
class HubertEncoder(FairseqEncoder):
def __init__(self, cfg: HubertAsrConfig, tgt_dict=None):
self.apply_mask = cfg.apply_mask
arg_overrides = {
"dropout": cfg.dropout,
"activation_dropout": cfg.activation_dropout,
"dropout_input": cfg.dropout_input,
"attention_dropout": cfg.attention_dropout,
"mask_length": cfg.mask_length,
"mask_prob": cfg.mask_prob,
"mask_selection": cfg.mask_selection,
"mask_other": cfg.mask_other,
"no_mask_overlap": cfg.no_mask_overlap,
"mask_channel_length": cfg.mask_channel_length,
"mask_channel_prob": cfg.mask_channel_prob,
"mask_channel_selection": cfg.mask_channel_selection,
"mask_channel_other": cfg.mask_channel_other,
"no_mask_channel_overlap": cfg.no_mask_channel_overlap,
"encoder_layerdrop": cfg.layerdrop,
"feature_grad_mult": cfg.feature_grad_mult,
}
if cfg.w2v_args is None:
state = checkpoint_utils.load_checkpoint_to_cpu(cfg.w2v_path, arg_overrides)
w2v_args = state.get("cfg", None)
if w2v_args is None:
w2v_args = convert_namespace_to_omegaconf(state["args"])
cfg.w2v_args = w2v_args
else:
state = None
w2v_args = cfg.w2v_args
if isinstance(w2v_args, Namespace):
cfg.w2v_args = w2v_args = convert_namespace_to_omegaconf(w2v_args)
assert cfg.normalize == w2v_args.task.normalize, (
"Fine-tuning works best when data normalization is the same. "
"Please check that --normalize is set or unset for "
"both pre-training and here"
)
w2v_args.task.data = cfg.data
task = tasks.setup_task(w2v_args.task)
if state is not None and "task_state" in state:
# This will load the stored "dictionaries" object
task.load_state_dict(state["task_state"])
model = task.build_model(w2v_args.model, from_checkpoint=True)
if state is not None and not cfg.no_pretrained_weights:
# set strict=False because we omit some modules
model.load_state_dict(state["model"], strict=False)
model.remove_pretraining_modules()
super().__init__(task.source_dictionary)
d = w2v_args.model.encoder_embed_dim
self.w2v_model = model
self.final_dropout = nn.Dropout(cfg.final_dropout)
self.freeze_finetune_updates = cfg.freeze_finetune_updates
self.num_updates = 0
if tgt_dict is not None:
self.proj = Linear(d, len(tgt_dict))
elif getattr(cfg, "decoder_embed_dim", d) != d:
self.proj = Linear(d, cfg.decoder_embed_dim)
else:
self.proj = None
def set_num_updates(self, num_updates):
"""Set the number of parameters updates."""
super().set_num_updates(num_updates)
self.num_updates = num_updates
def forward(self, source, padding_mask, tbc=True, **kwargs):
w2v_args = {
"source": source,
"padding_mask": padding_mask,
"mask": self.apply_mask and self.training,
}
ft = self.freeze_finetune_updates <= self.num_updates
with torch.no_grad() if not ft else contextlib.ExitStack():
x, padding_mask = self.w2v_model.extract_features(**w2v_args)
if tbc:
# B x T x C -> T x B x C
x = x.transpose(0, 1)
x = self.final_dropout(x)
if self.proj:
x = self.proj(x)
return {
"encoder_out": x, # T x B x C
"encoder_padding_mask": padding_mask, # B x T
"padding_mask": padding_mask,
}
def reorder_encoder_out(self, encoder_out, new_order):
if encoder_out["encoder_out"] is not None:
encoder_out["encoder_out"] = encoder_out["encoder_out"].index_select(
1, new_order
)
if encoder_out["encoder_padding_mask"] is not None:
encoder_out["encoder_padding_mask"] = encoder_out[
"encoder_padding_mask"
].index_select(0, new_order)
return encoder_out
def max_positions(self):
"""Maximum input length supported by the encoder."""
return None
def upgrade_state_dict_named(self, state_dict, name):
return state_dict
def Embedding(num_embeddings, embedding_dim, padding_idx):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
return m
def Linear(in_features, out_features, bias=True):
m = nn.Linear(in_features, out_features, bias)
nn.init.xavier_uniform_(m.weight)
if bias:
nn.init.constant_(m.bias, 0.0)
return m
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/hubert/hubert_asr.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from dataclasses import dataclass, field
from typing import Dict, List, Optional, Tuple
import numpy as np
import torch
import torch.nn as nn
from omegaconf import II
from fairseq import utils
from fairseq.data.data_utils import compute_mask_indices
from fairseq.data.dictionary import Dictionary
from fairseq.dataclass import ChoiceEnum, FairseqDataclass
from fairseq.models import BaseFairseqModel, register_model
from fairseq.models.wav2vec.wav2vec2 import (
ConvFeatureExtractionModel,
TransformerEncoder,
)
from fairseq.modules import GradMultiply, LayerNorm
from fairseq.tasks.hubert_pretraining import (
HubertPretrainingConfig,
HubertPretrainingTask,
)
logger = logging.getLogger(__name__)
EXTRACTOR_MODE_CHOICES = ChoiceEnum(["default", "layer_norm"])
MASKING_DISTRIBUTION_CHOICES = ChoiceEnum(["static", "uniform", "normal", "poisson"])
@dataclass
class HubertConfig(FairseqDataclass):
label_rate: int = II("task.label_rate")
extractor_mode: EXTRACTOR_MODE_CHOICES = field(
default="default",
metadata={
"help": "mode for feature extractor. default has a single group "
"norm with d groups in the first conv block, whereas layer_norm "
"has layer norms in every block (meant to use with normalize=True)"
},
)
encoder_layers: int = field(
default=12, metadata={"help": "num encoder layers in the transformer"}
)
encoder_embed_dim: int = field(
default=768, metadata={"help": "encoder embedding dimension"}
)
encoder_ffn_embed_dim: int = field(
default=3072, metadata={"help": "encoder embedding dimension for FFN"}
)
encoder_attention_heads: int = field(
default=12, metadata={"help": "num encoder attention heads"}
)
activation_fn: ChoiceEnum(utils.get_available_activation_fns()) = field(
default="gelu", metadata={"help": "activation function to use"}
)
# dropouts
dropout: float = field(
default=0.1,
metadata={"help": "dropout probability for the transformer"},
)
attention_dropout: float = field(
default=0.1,
metadata={"help": "dropout probability for attention weights"},
)
activation_dropout: float = field(
default=0.0,
metadata={"help": "dropout probability after activation in FFN"},
)
encoder_layerdrop: float = field(
default=0.0,
metadata={"help": "probability of dropping a tarnsformer layer"},
)
dropout_input: float = field(
default=0.0,
metadata={"help": "dropout to apply to the input (after feat extr)"},
)
dropout_features: float = field(
default=0.0,
metadata={"help": "dropout to apply to the features (after feat extr)"},
)
final_dim: int = field(
default=0,
metadata={
"help": "project final representations and targets to this many "
"dimensions. set to encoder_embed_dim is <= 0"
},
)
untie_final_proj: bool = field(
default=False,
metadata={"help": "use separate projection for each target"},
)
layer_norm_first: bool = field(
default=False,
metadata={"help": "apply layernorm first in the transformer"},
)
conv_feature_layers: str = field(
default="[(512,10,5)] + [(512,3,2)] * 4 + [(512,2,2)] * 2",
metadata={
"help": "string describing convolutional feature extraction "
"layers in form of a python list that contains "
"[(dim, kernel_size, stride), ...]"
},
)
conv_bias: bool = field(
default=False, metadata={"help": "include bias in conv encoder"}
)
logit_temp: float = field(
default=0.1, metadata={"help": "temperature to divide logits by"}
)
target_glu: bool = field(
default=False, metadata={"help": "adds projection + glu to targets"}
)
feature_grad_mult: float = field(
default=1.0,
metadata={"help": "multiply feature extractor var grads by this"},
)
# masking
mask_length: int = field(default=10, metadata={"help": "mask length"})
mask_prob: float = field(
default=0.65,
metadata={"help": "probability of replacing a token with mask"},
)
mask_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static", metadata={"help": "how to choose mask length"}
)
mask_other: float = field(
default=0,
metadata={
"help": "secondary mask argument "
"(used for more complex distributions), "
"see help in compute_mask_indicesh"
},
)
no_mask_overlap: bool = field(
default=False, metadata={"help": "whether to allow masks to overlap"}
)
mask_min_space: int = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
# channel masking
mask_channel_length: int = field(
default=10,
metadata={"help": "length of the mask for features (channels)"},
)
mask_channel_prob: float = field(
default=0.0,
metadata={"help": "probability of replacing a feature with 0"},
)
mask_channel_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static",
metadata={"help": "how to choose mask length for channel masking"},
)
mask_channel_other: float = field(
default=0,
metadata={
"help": "secondary mask argument "
"(used for more complex distributions), "
"see help in compute_mask_indicesh"
},
)
no_mask_channel_overlap: bool = field(
default=False,
metadata={"help": "whether to allow channel masks to overlap"},
)
mask_channel_min_space: int = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
# positional embeddings
conv_pos: int = field(
default=128,
metadata={"help": "number of filters for convolutional positional embeddings"},
)
conv_pos_groups: int = field(
default=16,
metadata={"help": "number of groups for convolutional positional embedding"},
)
latent_temp: Tuple[float, float, float] = field(
default=(2, 0.5, 0.999995),
metadata={"help": "legacy (to be removed)"},
)
# loss computation
skip_masked: bool = field(
default=False,
metadata={"help": "skip computing losses over masked frames"},
)
skip_nomask: bool = field(
default=False,
metadata={"help": "skip computing losses over unmasked frames"},
)
checkpoint_activations: bool = field(
default=False,
metadata={"help": "recompute activations and save memory for extra compute"},
)
@register_model("hubert", dataclass=HubertConfig)
class HubertModel(BaseFairseqModel):
def __init__(
self,
cfg: HubertConfig,
task_cfg: HubertPretrainingConfig,
dictionaries: List[Dictionary],
) -> None:
super().__init__()
logger.info(f"HubertModel Config: {cfg}")
feature_enc_layers = eval(cfg.conv_feature_layers) # noqa
self.embed = feature_enc_layers[-1][0]
self.feature_extractor = ConvFeatureExtractionModel(
conv_layers=feature_enc_layers,
dropout=0.0,
mode=cfg.extractor_mode,
conv_bias=cfg.conv_bias,
)
feature_ds_rate = np.prod([s for _, _, s in feature_enc_layers])
self.feat2tar_ratio = cfg.label_rate * feature_ds_rate / task_cfg.sample_rate
self.post_extract_proj = (
nn.Linear(self.embed, cfg.encoder_embed_dim)
if self.embed != cfg.encoder_embed_dim
else None
)
self.mask_prob = cfg.mask_prob
self.mask_selection = cfg.mask_selection
self.mask_other = cfg.mask_other
self.mask_length = cfg.mask_length
self.no_mask_overlap = cfg.no_mask_overlap
self.mask_min_space = cfg.mask_min_space
self.mask_channel_prob = cfg.mask_channel_prob
self.mask_channel_selection = cfg.mask_channel_selection
self.mask_channel_other = cfg.mask_channel_other
self.mask_channel_length = cfg.mask_channel_length
self.no_mask_channel_overlap = cfg.no_mask_channel_overlap
self.mask_channel_min_space = cfg.mask_channel_min_space
self.dropout_input = nn.Dropout(cfg.dropout_input)
self.dropout_features = nn.Dropout(cfg.dropout_features)
self.feature_grad_mult = cfg.feature_grad_mult
self.logit_temp = cfg.logit_temp
self.skip_masked = cfg.skip_masked
self.skip_nomask = cfg.skip_nomask
final_dim = cfg.final_dim if cfg.final_dim > 0 else cfg.encoder_embed_dim
self.mask_emb = nn.Parameter(
torch.FloatTensor(cfg.encoder_embed_dim).uniform_()
)
self.encoder = TransformerEncoder(cfg)
self.layer_norm = LayerNorm(self.embed)
self.target_glu = None
if cfg.target_glu:
self.target_glu = nn.Sequential(
nn.Linear(final_dim, final_dim * 2), nn.GLU()
)
self.untie_final_proj = cfg.untie_final_proj
if self.untie_final_proj:
self.final_proj = nn.Linear(
cfg.encoder_embed_dim, final_dim * len(dictionaries)
)
else:
self.final_proj = nn.Linear(cfg.encoder_embed_dim, final_dim)
# modules below are not needed during fine-tuning
if any([d is None for d in dictionaries]):
logger.info("cannot find dictionary. assume will be used for fine-tuning")
else:
self.num_classes = [len(d) for d in dictionaries]
self.label_embs_concat = nn.Parameter(
torch.FloatTensor(sum(self.num_classes), final_dim)
)
nn.init.uniform_(self.label_embs_concat)
def upgrade_state_dict_named(self, state_dict, name):
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
super().upgrade_state_dict_named(state_dict, name)
return state_dict
@classmethod
def build_model(cls, cfg: HubertConfig, task: HubertPretrainingTask):
"""Build a new model instance."""
model = HubertModel(cfg, task.cfg, task.dictionaries)
return model
def apply_mask(self, x, padding_mask, target_list):
B, T, C = x.shape
if self.mask_prob > 0:
mask_indices = compute_mask_indices(
(B, T),
padding_mask,
self.mask_prob,
self.mask_length,
self.mask_selection,
self.mask_other,
min_masks=2,
no_overlap=self.no_mask_overlap,
min_space=self.mask_min_space,
)
mask_indices = torch.from_numpy(mask_indices).to(x.device)
x[mask_indices] = self.mask_emb
else:
mask_indices = None
if self.mask_channel_prob > 0:
mask_channel_indices = compute_mask_indices(
(B, C),
None,
self.mask_channel_prob,
self.mask_channel_length,
self.mask_channel_selection,
self.mask_channel_other,
no_overlap=self.no_mask_channel_overlap,
min_space=self.mask_channel_min_space,
)
mask_channel_indices = (
torch.from_numpy(mask_channel_indices)
.to(x.device)
.unsqueeze(1)
.expand(-1, T, -1)
)
x[mask_channel_indices] = 0
return x, mask_indices
def compute_nce(self, x, pos, negs):
neg_is_pos = (pos == negs).all(-1)
pos = pos.unsqueeze(0)
targets = torch.cat([pos, negs], dim=0)
logits = torch.cosine_similarity(x.float(), targets.float(), dim=-1).type_as(x)
logits /= self.logit_temp
if neg_is_pos.any():
logits[1:][neg_is_pos] = float("-inf")
logits = logits.transpose(0, 1) # (num_x, num_cls+1)
return logits
def forward_features(self, source: torch.Tensor) -> torch.Tensor:
if self.feature_grad_mult > 0:
features = self.feature_extractor(source)
if self.feature_grad_mult != 1.0:
features = GradMultiply.apply(features, self.feature_grad_mult)
else:
with torch.no_grad():
features = self.feature_extractor(source)
return features
def forward_targets(
self,
features: torch.Tensor,
target_list: List[torch.Tensor],
) -> Tuple[torch.Tensor, torch.Tensor]:
# Trim features to ensure labels exist and then get aligned labels
feat_tsz = features.size(2)
targ_tsz = min([t.size(1) for t in target_list])
if self.feat2tar_ratio * feat_tsz > targ_tsz:
feat_tsz = int(targ_tsz / self.feat2tar_ratio)
features = features[..., :feat_tsz]
target_inds = torch.arange(feat_tsz).float() * self.feat2tar_ratio
target_list = [t[:, target_inds.long()] for t in target_list]
return features, target_list
def forward_padding_mask(
self,
features: torch.Tensor,
padding_mask: torch.Tensor,
) -> torch.Tensor:
extra = padding_mask.size(1) % features.size(1)
if extra > 0:
padding_mask = padding_mask[:, :-extra]
padding_mask = padding_mask.view(padding_mask.size(0), features.size(1), -1)
padding_mask = padding_mask.all(-1)
return padding_mask
def forward(
self,
source: torch.Tensor,
target_list: Optional[List[torch.Tensor]] = None,
padding_mask: Optional[torch.Tensor] = None,
mask: bool = True,
features_only: bool = False,
output_layer: Optional[int] = None,
) -> Dict[str, torch.Tensor]:
"""output layer is 1-based"""
features = self.forward_features(source)
if target_list is not None:
features, target_list = self.forward_targets(features, target_list)
features_pen = features.float().pow(2).mean()
features = features.transpose(1, 2)
features = self.layer_norm(features)
unmasked_features = features.clone()
if padding_mask is not None:
padding_mask = self.forward_padding_mask(features, padding_mask)
if self.post_extract_proj is not None:
features = self.post_extract_proj(features)
features = self.dropout_input(features)
unmasked_features = self.dropout_features(unmasked_features)
if mask:
x, mask_indices = self.apply_mask(features, padding_mask, target_list)
else:
x = features
mask_indices = None
# feature: (B, T, D), float
# target: (B, T), long
# x: (B, T, D), float
# padding_mask: (B, T), bool
# mask_indices: (B, T), bool
x, _ = self.encoder(
x,
padding_mask=padding_mask,
layer=None if output_layer is None else output_layer - 1,
)
if features_only:
return {"x": x, "padding_mask": padding_mask, "features": features}
def compute_pred(proj_x, target, label_embs):
# compute logits for the i-th label set
y = torch.index_select(label_embs, 0, target.long())
negs = label_embs.unsqueeze(1).expand(-1, proj_x.size(0), -1)
if self.target_glu:
y = self.target_glu(y)
negs = self.target_glu(negs)
# proj_x: (S, D)
# y: (S, D)
# negs: (Neg, S, D)
return self.compute_nce(proj_x, y, negs)
label_embs_list = self.label_embs_concat.split(self.num_classes, 0)
if not self.skip_masked:
masked_indices = torch.logical_and(~padding_mask, mask_indices)
proj_x_m = self.final_proj(x[masked_indices])
if self.untie_final_proj:
proj_x_m_list = proj_x_m.chunk(len(target_list), dim=-1)
else:
proj_x_m_list = [proj_x_m for _ in range(len(target_list))]
logit_m_list = [
compute_pred(proj_x_m, t[masked_indices], label_embs_list[i])
for i, (proj_x_m, t) in enumerate(zip(proj_x_m_list, target_list))
]
else:
logit_m_list = [None for _ in target_list]
if not self.skip_nomask:
nomask_indices = torch.logical_and(~padding_mask, ~mask_indices)
proj_x_u = self.final_proj(x[nomask_indices])
if self.untie_final_proj:
proj_x_u_list = proj_x_u.chunk(len(target_list), dim=-1)
else:
proj_x_u_list = [proj_x_u for _ in range(len(target_list))]
logit_u_list = [
compute_pred(proj_x_u, t[nomask_indices], label_embs_list[i])
for i, (proj_x_u, t) in enumerate(zip(proj_x_u_list, target_list))
]
else:
logit_u_list = [None for _ in target_list]
result = {
"logit_m_list": logit_m_list,
"logit_u_list": logit_u_list,
"padding_mask": padding_mask,
"features_pen": features_pen,
}
return result
def extract_features(
self,
source: torch.Tensor,
padding_mask: Optional[torch.Tensor] = None,
mask: bool = False,
ret_conv: bool = False,
output_layer: Optional[int] = None,
) -> Tuple[torch.Tensor, torch.Tensor]:
res = self.forward(
source,
padding_mask=padding_mask,
mask=mask,
features_only=True,
output_layer=output_layer,
)
feature = res["features"] if ret_conv else res["x"]
return feature, res["padding_mask"]
def get_logits(self, net_output, is_masked=True):
if is_masked:
logits_list = net_output["logit_m_list"]
else:
logits_list = net_output["logit_u_list"]
logits_list = [x.float() for x in logits_list if x is not None]
return logits_list
def get_targets(self, net_output, is_masked=True):
logits_list = self.get_logits(net_output, is_masked)
targets_list = [x.new_zeros(x.size(0), dtype=torch.long) for x in logits_list]
return targets_list
def get_extra_losses(self, net_output):
extra_losses = []
names = []
if "features_pen" in net_output:
extra_losses.append(net_output["features_pen"])
names.append("features_pen")
return extra_losses, names
def remove_pretraining_modules(self):
self.target_glu = None
self.final_proj = None
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/hubert/hubert.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import re
from dataclasses import dataclass, field, fields
from typing import List, Optional
from omegaconf import II
from fairseq import utils
from fairseq.dataclass import ChoiceEnum, FairseqDataclass
from fairseq.utils import safe_getattr, safe_hasattr
DEFAULT_MAX_SOURCE_POSITIONS = 1024
DEFAULT_MAX_TARGET_POSITIONS = 1024
DEFAULT_MIN_PARAMS_TO_WRAP = int(1e8)
_NAME_PARSER = r"(decoder|encoder|quant_noise)_(.*)"
@dataclass
class EncDecBaseConfig(FairseqDataclass):
embed_path: Optional[str] = field(
default=None, metadata={"help": "path to pre-trained embedding"}
)
embed_dim: Optional[int] = field(
default=512, metadata={"help": "embedding dimension"}
)
ffn_embed_dim: int = field(
default=2048, metadata={"help": "embedding dimension for FFN"}
)
layers: int = field(default=6, metadata={"help": "number of layers"})
attention_heads: int = field(
default=8, metadata={"help": "number of attention heads"}
)
normalize_before: bool = field(
default=False, metadata={"help": "apply layernorm before each block"}
)
learned_pos: bool = field(
default=False, metadata={"help": "use learned positional embeddings"}
)
# args for "Reducing Transformer Depth on Demand with Structured Dropout" (Fan et al., 2019)
layerdrop: float = field(default=0, metadata={"help": "LayerDrop probability"})
layers_to_keep: Optional[List[int]] = field(
default=None, metadata={"help": "which layers to *keep* when pruning"}
)
@dataclass
class DecoderConfig(EncDecBaseConfig):
input_dim: int = II("model.decoder.embed_dim")
output_dim: int = field(
default=II("model.decoder.embed_dim"),
metadata={
"help": "decoder output dimension (extra linear layer if different from decoder embed dim)"
},
)
def __post_init__(self):
# II doesn't work if we are just creating the object outside of hydra so fix that
if self.input_dim == II("model.decoder.embed_dim"):
self.input_dim = self.embed_dim
if self.output_dim == II("model.decoder.embed_dim"):
self.output_dim = self.embed_dim
@dataclass
class QuantNoiseConfig(FairseqDataclass):
pq: float = field(
default=0.0,
metadata={"help": "iterative PQ quantization noise at training time"},
)
pq_block_size: int = field(
default=8,
metadata={"help": "block size of quantization noise at training time"},
)
scalar: float = field(
default=0.0,
metadata={
"help": "scalar quantization noise and scalar quantization at training time"
},
)
@dataclass
class TransformerConfig(FairseqDataclass):
activation_fn: ChoiceEnum(utils.get_available_activation_fns()) = field(
default="relu",
metadata={"help": "activation function to use"},
)
dropout: float = field(default=0.1, metadata={"help": "dropout probability"})
attention_dropout: float = field(
default=0.0, metadata={"help": "dropout probability for attention weights"}
)
activation_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability after activation in FFN.",
"alias": "--relu-dropout",
},
)
adaptive_input: bool = False
encoder: EncDecBaseConfig = EncDecBaseConfig()
# TODO should really be in the encoder config
max_source_positions: int = field(
default=DEFAULT_MAX_SOURCE_POSITIONS,
metadata={"help": "Maximum input length supported by the encoder"},
)
decoder: DecoderConfig = DecoderConfig()
# TODO should really be in the decoder config
max_target_positions: int = field(
default=DEFAULT_MAX_TARGET_POSITIONS,
metadata={"help": "Maximum output length supported by the decoder"},
)
share_decoder_input_output_embed: bool = field(
default=False, metadata={"help": "share decoder input and output embeddings"}
)
share_all_embeddings: bool = field(
default=False,
metadata={
"help": "share encoder, decoder and output embeddings (requires shared dictionary and embed dim)"
},
)
no_token_positional_embeddings: bool = field(
default=False,
metadata={
"help": "if True, disables positional embeddings (outside self attention)"
},
)
adaptive_softmax_cutoff: Optional[List[int]] = field(
default=None,
metadata={
"help": "list of adaptive softmax cutoff points. Must be used with adaptive_loss criterion"
},
)
adaptive_softmax_dropout: float = field(
default=0.0,
metadata={"help": "sets adaptive softmax dropout for the tail projections"},
)
adaptive_softmax_factor: float = field(
default=4, metadata={"help": "adaptive input factor"}
)
layernorm_embedding: bool = field(
default=False, metadata={"help": "add layernorm to embedding"}
)
tie_adaptive_weights: bool = field(
default=False,
metadata={
"help": "if set, ties the weights of adaptive softmax and adaptive input"
},
)
tie_adaptive_proj: bool = field(
default=False,
metadata={
"help": "if set, ties the projection weights of adaptive softmax and adaptive input"
},
)
no_scale_embedding: bool = field(
default=False, metadata={"help": "if True, dont scale embeddings"}
)
checkpoint_activations: bool = field(
default=False,
metadata={
"help": "checkpoint activations at each layer, which saves GPU memory usage at the cost of some additional compute"
},
)
offload_activations: bool = field(
default=False,
metadata={
"help": "checkpoint activations at each layer, then save to gpu. Sets --checkpoint-activations."
},
)
# args for "Cross+Self-Attention for Transformer Models" (Peitz et al., 2019)
no_cross_attention: bool = field(
default=False, metadata={"help": "do not perform cross-attention"}
)
cross_self_attention: bool = field(
default=False, metadata={"help": "perform cross+self-attention"}
)
# args for Training with Quantization Noise for Extreme Model Compression ({Fan*, Stock*} et al., 2020)
quant_noise: QuantNoiseConfig = field(default=QuantNoiseConfig())
min_params_to_wrap: int = field(
default=DEFAULT_MIN_PARAMS_TO_WRAP,
metadata={
"help": "minimum number of params for a layer to be wrapped with FSDP() when "
"training with --ddp-backend=fully_sharded. Smaller values will "
"improve memory efficiency, but may make torch.distributed "
"communication less efficient due to smaller input sizes. This option "
"is set to 0 (i.e., always wrap) when --checkpoint-activations or "
"--offload-activations are passed."
},
)
# DEPRECATED field, but some old checkpoints might have it
char_inputs: bool = field(
default=False, metadata={"help": "if set, model takes character ids as input"}
)
relu_dropout: float = 0.0
# config for "BASE Layers: Simplifying Training of Large, Sparse Models"
base_layers: Optional[int] = field(
default=0, metadata={"help": "number of BASE layers in total"}
)
base_sublayers: Optional[int] = field(
default=1, metadata={"help": "number of sublayers in each BASE layer"}
)
base_shuffle: Optional[int] = field(
default=1,
metadata={"help": "shuffle tokens between workers before computing assignment"},
)
export: bool = field(
default=False,
metadata={"help": "make the layernorm exportable with torchscript."},
)
# copied from transformer_lm but expected in transformer_decoder:
no_decoder_final_norm: bool = field(
default=False,
metadata={"help": "don't add an extra layernorm after the last decoder block"},
)
deepnet: bool = field(
default=False,
metadata={
"help": "enable deepnet in decoder"
},
)
last_ln_scale: bool = field(
default=False,
metadata={
"help": "enable last_ln_scale in decoder"
},
)
# We need to make this hierarchical dataclass like the flat namespace
# __getattr__ and __setattr__ here allow backward compatibility
# for subclasses of Transformer(Legacy) that depend on read/write on
# the flat namespace.
def __getattr__(self, name):
match = re.match(_NAME_PARSER, name)
if match:
sub = safe_getattr(self, match[1])
return safe_getattr(sub, match[2])
raise AttributeError(f"invalid argument {name}.")
def __setattr__(self, name, value):
match = re.match(_NAME_PARSER, name)
if match:
sub = safe_getattr(self, match[1])
setattr(sub, match[2], value)
else:
super().__setattr__(name, value)
@staticmethod
def _copy_keys(args, cls, prefix, seen):
"""
copy the prefixed keys (decoder_embed_dim) to the DC fields: decoder.embed_dim
"""
cfg = cls()
for fld in fields(cls):
# for all the fields in the DC, find the fields (e.g. embed_dim)
# in the namespace with the prefix (e.g. decoder)
# and set it on the dc.
args_key = f"{prefix}_{fld.name}"
if safe_hasattr(args, args_key):
seen.add(args_key)
setattr(cfg, fld.name, safe_getattr(args, args_key))
if safe_hasattr(args, fld.name):
seen.add(fld.name)
setattr(cfg, fld.name, safe_getattr(args, fld.name))
return cfg
@classmethod
def from_namespace(cls, args):
if args is None:
return None
if not isinstance(args, cls):
seen = set()
config = cls()
# currently, we can go generically from DC fields to args hierarchically
# but we can't easily deconstruct a flat namespace to a hierarchical
# DC. Mostly because we could have a sub-dc called `decoder-foo` that should not
# go to the sub struct called `decoder`. There are ways to go around this, but let's keep it simple
# for now.
for fld in fields(cls):
# concretelly, the transformer_config know what sub-dc it has, so we go through all the dc fields
# and if it's one that has a sub-dc, we build that sub-dc with `copy_keys()`
if fld.name == "decoder":
if safe_hasattr(args, "decoder"):
# in some cases, the args we receive is already structured (as DictConfigs), so let's just build the correct DC
seen.add("decoder")
config.decoder = DecoderConfig(**args.decoder)
else:
config.decoder = cls._copy_keys(
args, DecoderConfig, "decoder", seen
)
elif fld.name == "encoder":
# same but for encoder
if safe_hasattr(args, "encoder"):
seen.add("encoder")
config.encoder = EncDecBaseConfig(**args.encoder)
else:
config.encoder = cls._copy_keys(
args, EncDecBaseConfig, "encoder", seen
)
elif fld.name == "quant_noise":
# same but for quant_noise
if safe_hasattr(args, "quant_noise"):
seen.add("quant_noise")
config.quant_noise = QuantNoiseConfig(**args.quant_noise)
else:
config.quant_noise = cls._copy_keys(
args, QuantNoiseConfig, "quant_noise", seen
)
elif safe_hasattr(args, fld.name):
# if it's not a structure field, it's just a normal field, copy it over
seen.add(fld.name)
setattr(config, fld.name, safe_getattr(args, fld.name))
# we got all the fields defined in the dataclass, but
# the argparse namespace might have extra args for two reasons:
# - we are in a legacy class so all the args are not declared in the dataclass. Ideally once everyone has defined a dataclass for their model, we won't need this
# - some places expect args to be there but never define them
args_dict = (
args._asdict()
if safe_hasattr(args, "_asdict")
else vars(args)
if safe_hasattr(args, "__dict__")
else {}
) # namedtupled doesn't have __dict__ :-/
for key, value in args_dict.items():
if key not in seen:
setattr(config, key, value)
return config
else:
return args
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/transformer_config.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from fairseq.dataclass.utils import gen_parser_from_dataclass
from fairseq.models import (
register_model,
register_model_architecture,
)
from fairseq.models.transformer.transformer_config import (
TransformerConfig,
DEFAULT_MAX_SOURCE_POSITIONS,
DEFAULT_MAX_TARGET_POSITIONS,
DEFAULT_MIN_PARAMS_TO_WRAP,
)
from fairseq.models.transformer.transformer_base import (
TransformerModelBase,
)
@register_model("transformer")
class TransformerModel(TransformerModelBase):
"""
This is the legacy implementation of the transformer model that
uses argparse for configuration.
"""
@classmethod
def hub_models(cls):
# fmt: off
def moses_subword(path):
return {
'path': path,
'tokenizer': 'moses',
'bpe': 'subword_nmt',
}
def moses_fastbpe(path):
return {
'path': path,
'tokenizer': 'moses',
'bpe': 'fastbpe',
}
def spm(path):
return {
'path': path,
'bpe': 'sentencepiece',
'tokenizer': 'space',
}
return {
'transformer.wmt14.en-fr': moses_subword('https://dl.fbaipublicfiles.com/fairseq/models/wmt14.en-fr.joined-dict.transformer.tar.bz2'),
'transformer.wmt16.en-de': 'https://dl.fbaipublicfiles.com/fairseq/models/wmt16.en-de.joined-dict.transformer.tar.bz2',
'transformer.wmt18.en-de': moses_subword('https://dl.fbaipublicfiles.com/fairseq/models/wmt18.en-de.ensemble.tar.gz'),
'transformer.wmt19.en-de': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.en-de.joined-dict.ensemble.tar.gz'),
'transformer.wmt19.en-ru': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.en-ru.ensemble.tar.gz'),
'transformer.wmt19.de-en': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.de-en.joined-dict.ensemble.tar.gz'),
'transformer.wmt19.ru-en': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.ru-en.ensemble.tar.gz'),
'transformer.wmt19.en-de.single_model': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.en-de.joined-dict.single_model.tar.gz'),
'transformer.wmt19.en-ru.single_model': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.en-ru.single_model.tar.gz'),
'transformer.wmt19.de-en.single_model': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.de-en.joined-dict.single_model.tar.gz'),
'transformer.wmt19.ru-en.single_model': moses_fastbpe('https://dl.fbaipublicfiles.com/fairseq/models/wmt19.ru-en.single_model.tar.gz'),
'transformer.wmt20.en-ta': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.en-ta.single.tar.gz'),
'transformer.wmt20.en-iu.news': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.en-iu.news.single.tar.gz'),
'transformer.wmt20.en-iu.nh': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.en-iu.nh.single.tar.gz'),
'transformer.wmt20.ta-en': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.ta-en.single.tar.gz'),
'transformer.wmt20.iu-en.news': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.iu-en.news.single.tar.gz'),
'transformer.wmt20.iu-en.nh': spm('https://dl.fbaipublicfiles.com/fairseq/models/wmt20.iu-en.nh.single.tar.gz'),
'transformer.flores101.mm100.615M': spm('https://dl.fbaipublicfiles.com/flores101/pretrained_models/flores101_mm100_615M.tar.gz'),
'transformer.flores101.mm100.175M': spm('https://dl.fbaipublicfiles.com/flores101/pretrained_models/flores101_mm100_175M.tar.gz'),
}
# fmt: on
def __init__(self, args, encoder, decoder):
cfg = TransformerConfig.from_namespace(args)
super().__init__(cfg, encoder, decoder)
self.args = args
@classmethod
def add_args(cls, parser):
"""Add model-specific arguments to the parser."""
# we want to build the args recursively in this case.
# do not set defaults so that settings defaults from various architectures still works
gen_parser_from_dataclass(
parser, TransformerConfig(), delete_default=True, with_prefix=""
)
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
# make sure all arguments are present in older models
base_architecture(args)
if args.encoder_layers_to_keep:
args.encoder_layers = len(args.encoder_layers_to_keep.split(","))
if args.decoder_layers_to_keep:
args.decoder_layers = len(args.decoder_layers_to_keep.split(","))
if getattr(args, "max_source_positions", None) is None:
args.max_source_positions = DEFAULT_MAX_SOURCE_POSITIONS
if getattr(args, "max_target_positions", None) is None:
args.max_target_positions = DEFAULT_MAX_TARGET_POSITIONS
src_dict, tgt_dict = task.source_dictionary, task.target_dictionary
if args.share_all_embeddings:
if src_dict != tgt_dict:
raise ValueError("--share-all-embeddings requires a joined dictionary")
if args.encoder_embed_dim != args.decoder_embed_dim:
raise ValueError(
"--share-all-embeddings requires --encoder-embed-dim to match --decoder-embed-dim"
)
if args.decoder_embed_path and (
args.decoder_embed_path != args.encoder_embed_path
):
raise ValueError(
"--share-all-embeddings not compatible with --decoder-embed-path"
)
args.share_decoder_input_output_embed = True
if getattr(args, "offload_activations", False):
args.checkpoint_activations = True # offloading implies checkpointing
if not args.share_all_embeddings:
args.min_params_to_wrap = getattr(
args, "min_params_to_wrap", DEFAULT_MIN_PARAMS_TO_WRAP
)
cfg = TransformerConfig.from_namespace(args)
return super().build_model(cfg, task)
@classmethod
def build_embedding(cls, args, dictionary, embed_dim, path=None):
return super().build_embedding(
TransformerConfig.from_namespace(args), dictionary, embed_dim, path
)
@classmethod
def build_encoder(cls, args, src_dict, embed_tokens):
return super().build_encoder(
TransformerConfig.from_namespace(args), src_dict, embed_tokens
)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
return super().build_decoder(
TransformerConfig.from_namespace(args), tgt_dict, embed_tokens
)
# architectures
@register_model_architecture("transformer", "transformer_tiny")
def tiny_architecture(args):
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 64)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 64)
args.encoder_layers = getattr(args, "encoder_layers", 2)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 2)
args.decoder_layers = getattr(args, "decoder_layers", 2)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 2)
return base_architecture(args)
@register_model_architecture("transformer", "transformer")
def base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.no_cross_attention = getattr(args, "no_cross_attention", False)
args.cross_self_attention = getattr(args, "cross_self_attention", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
args.no_scale_embedding = getattr(args, "no_scale_embedding", False)
args.layernorm_embedding = getattr(args, "layernorm_embedding", False)
args.tie_adaptive_weights = getattr(args, "tie_adaptive_weights", False)
args.checkpoint_activations = getattr(args, "checkpoint_activations", False)
args.offload_activations = getattr(args, "offload_activations", False)
if args.offload_activations:
args.checkpoint_activations = True
args.encoder_layers_to_keep = getattr(args, "encoder_layers_to_keep", None)
args.decoder_layers_to_keep = getattr(args, "decoder_layers_to_keep", None)
args.encoder_layerdrop = getattr(args, "encoder_layerdrop", 0)
args.decoder_layerdrop = getattr(args, "decoder_layerdrop", 0)
args.quant_noise_pq = getattr(args, "quant_noise_pq", 0)
args.quant_noise_pq_block_size = getattr(args, "quant_noise_pq_block_size", 8)
args.quant_noise_scalar = getattr(args, "quant_noise_scalar", 0)
@register_model_architecture("transformer", "transformer_iwslt_de_en")
def transformer_iwslt_de_en(args):
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 1024)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 4)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 512)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 1024)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 4)
args.decoder_layers = getattr(args, "decoder_layers", 6)
base_architecture(args)
@register_model_architecture("transformer", "transformer_wmt_en_de")
def transformer_wmt_en_de(args):
base_architecture(args)
# parameters used in the "Attention Is All You Need" paper (Vaswani et al., 2017)
@register_model_architecture("transformer", "transformer_vaswani_wmt_en_de_big")
def transformer_vaswani_wmt_en_de_big(args):
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 1024)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 4096)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 16)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 1024)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 4096)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 16)
args.dropout = getattr(args, "dropout", 0.3)
base_architecture(args)
@register_model_architecture("transformer", "transformer_vaswani_wmt_en_fr_big")
def transformer_vaswani_wmt_en_fr_big(args):
args.dropout = getattr(args, "dropout", 0.1)
transformer_vaswani_wmt_en_de_big(args)
@register_model_architecture("transformer", "transformer_wmt_en_de_big")
def transformer_wmt_en_de_big(args):
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
transformer_vaswani_wmt_en_de_big(args)
# default parameters used in tensor2tensor implementation
@register_model_architecture("transformer", "transformer_wmt_en_de_big_t2t")
def transformer_wmt_en_de_big_t2t(args):
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", True)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", True)
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
args.activation_dropout = getattr(args, "activation_dropout", 0.1)
transformer_vaswani_wmt_en_de_big(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/transformer_legacy.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from typing import Dict, List, Optional
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.distributed import fsdp_wrap
from fairseq.models import FairseqEncoder
from fairseq.modules import (
FairseqDropout,
LayerDropModuleList,
LayerNorm,
PositionalEmbedding,
SinusoidalPositionalEmbedding,
)
from fairseq.modules import transformer_layer
from fairseq.modules.checkpoint_activations import checkpoint_wrapper
from fairseq.modules.quant_noise import quant_noise as apply_quant_noise_
from torch import Tensor
from fairseq.models.transformer import (
TransformerConfig,
)
# rewrite name for backward compatibility in `make_generation_fast_`
def module_name_fordropout(module_name: str) -> str:
if module_name == "TransformerEncoderBase":
return "TransformerEncoder"
else:
return module_name
class TransformerEncoderBase(FairseqEncoder):
"""
Transformer encoder consisting of *cfg.encoder.layers* layers. Each layer
is a :class:`TransformerEncoderLayer`.
Args:
args (argparse.Namespace): parsed command-line arguments
dictionary (~fairseq.data.Dictionary): encoding dictionary
embed_tokens (torch.nn.Embedding): input embedding
"""
def __init__(self, cfg, dictionary, embed_tokens):
self.cfg = cfg
super().__init__(dictionary)
self.register_buffer("version", torch.Tensor([3]))
self.dropout_module = FairseqDropout(
cfg.dropout, module_name=module_name_fordropout(self.__class__.__name__)
)
self.encoder_layerdrop = cfg.encoder.layerdrop
embed_dim = embed_tokens.embedding_dim
self.padding_idx = embed_tokens.padding_idx
self.max_source_positions = cfg.max_source_positions
self.embed_tokens = embed_tokens
self.embed_scale = 1.0 if cfg.no_scale_embedding else math.sqrt(embed_dim)
self.embed_positions = (
PositionalEmbedding(
cfg.max_source_positions,
embed_dim,
self.padding_idx,
learned=cfg.encoder.learned_pos,
)
if not cfg.no_token_positional_embeddings
else None
)
if cfg.layernorm_embedding:
self.layernorm_embedding = LayerNorm(embed_dim, export=cfg.export)
else:
self.layernorm_embedding = None
if not cfg.adaptive_input and cfg.quant_noise.pq > 0:
self.quant_noise = apply_quant_noise_(
nn.Linear(embed_dim, embed_dim, bias=False),
cfg.quant_noise.pq,
cfg.quant_noise.pq_block_size,
)
else:
self.quant_noise = None
if self.encoder_layerdrop > 0.0:
self.layers = LayerDropModuleList(p=self.encoder_layerdrop)
else:
self.layers = nn.ModuleList([])
self.layers.extend(
[self.build_encoder_layer(cfg) for i in range(cfg.encoder.layers)]
)
self.num_layers = len(self.layers)
if cfg.encoder.normalize_before:
self.layer_norm = LayerNorm(embed_dim, export=cfg.export)
else:
self.layer_norm = None
def build_encoder_layer(self, cfg):
layer = transformer_layer.TransformerEncoderLayerBase(cfg)
checkpoint = cfg.checkpoint_activations
if checkpoint:
offload_to_cpu = cfg.offload_activations
layer = checkpoint_wrapper(layer, offload_to_cpu=offload_to_cpu)
# if we are checkpointing, enforce that FSDP always wraps the
# checkpointed layer, regardless of layer size
min_params_to_wrap = cfg.min_params_to_wrap if not checkpoint else 0
layer = fsdp_wrap(layer, min_num_params=min_params_to_wrap)
return layer
def forward_embedding(
self, src_tokens, token_embedding: Optional[torch.Tensor] = None
):
# embed tokens and positions
if token_embedding is None:
token_embedding = self.embed_tokens(src_tokens)
x = embed = self.embed_scale * token_embedding
if self.embed_positions is not None:
x = embed + self.embed_positions(src_tokens)
if self.layernorm_embedding is not None:
x = self.layernorm_embedding(x)
x = self.dropout_module(x)
if self.quant_noise is not None:
x = self.quant_noise(x)
return x, embed
def forward(
self,
src_tokens,
src_lengths: Optional[torch.Tensor] = None,
return_all_hiddens: bool = False,
token_embeddings: Optional[torch.Tensor] = None,
):
"""
Args:
src_tokens (LongTensor): tokens in the source language of shape
`(batch, src_len)`
src_lengths (torch.LongTensor): lengths of each source sentence of
shape `(batch)`
return_all_hiddens (bool, optional): also return all of the
intermediate hidden states (default: False).
token_embeddings (torch.Tensor, optional): precomputed embeddings
default `None` will recompute embeddings
Returns:
dict:
- **encoder_out** (Tensor): the last encoder layer's output of
shape `(src_len, batch, embed_dim)`
- **encoder_padding_mask** (ByteTensor): the positions of
padding elements of shape `(batch, src_len)`
- **encoder_embedding** (Tensor): the (scaled) embedding lookup
of shape `(batch, src_len, embed_dim)`
- **encoder_states** (List[Tensor]): all intermediate
hidden states of shape `(src_len, batch, embed_dim)`.
Only populated if *return_all_hiddens* is True.
"""
return self.forward_scriptable(
src_tokens, src_lengths, return_all_hiddens, token_embeddings
)
# TorchScript doesn't support super() method so that the scriptable Subclass
# can't access the base class model in Torchscript.
# Current workaround is to add a helper function with different name and
# call the helper function from scriptable Subclass.
def forward_scriptable(
self,
src_tokens,
src_lengths: Optional[torch.Tensor] = None,
return_all_hiddens: bool = False,
token_embeddings: Optional[torch.Tensor] = None,
):
"""
Args:
src_tokens (LongTensor): tokens in the source language of shape
`(batch, src_len)`
src_lengths (torch.LongTensor): lengths of each source sentence of
shape `(batch)`
return_all_hiddens (bool, optional): also return all of the
intermediate hidden states (default: False).
token_embeddings (torch.Tensor, optional): precomputed embeddings
default `None` will recompute embeddings
Returns:
dict:
- **encoder_out** (Tensor): the last encoder layer's output of
shape `(src_len, batch, embed_dim)`
- **encoder_padding_mask** (ByteTensor): the positions of
padding elements of shape `(batch, src_len)`
- **encoder_embedding** (Tensor): the (scaled) embedding lookup
of shape `(batch, src_len, embed_dim)`
- **encoder_states** (List[Tensor]): all intermediate
hidden states of shape `(src_len, batch, embed_dim)`.
Only populated if *return_all_hiddens* is True.
"""
# compute padding mask
encoder_padding_mask = src_tokens.eq(self.padding_idx)
has_pads = src_tokens.device.type == "xla" or encoder_padding_mask.any()
x, encoder_embedding = self.forward_embedding(src_tokens, token_embeddings)
# account for padding while computing the representation
if has_pads:
x = x * (1 - encoder_padding_mask.unsqueeze(-1).type_as(x))
# B x T x C -> T x B x C
x = x.transpose(0, 1)
encoder_states = []
if return_all_hiddens:
encoder_states.append(x)
# encoder layers
for layer in self.layers:
x = layer(
x, encoder_padding_mask=encoder_padding_mask if has_pads else None
)
if return_all_hiddens:
assert encoder_states is not None
encoder_states.append(x)
if self.layer_norm is not None:
x = self.layer_norm(x)
# The Pytorch Mobile lite interpreter does not supports returning NamedTuple in
# `forward` so we use a dictionary instead.
# TorchScript does not support mixed values so the values are all lists.
# The empty list is equivalent to None.
src_lengths = (
src_tokens.ne(self.padding_idx)
.sum(dim=1, dtype=torch.int32)
.reshape(-1, 1)
.contiguous()
)
return {
"encoder_out": [x], # T x B x C
"encoder_padding_mask": [encoder_padding_mask], # B x T
"encoder_embedding": [encoder_embedding], # B x T x C
"encoder_states": encoder_states, # List[T x B x C]
"src_tokens": [],
"src_lengths": [src_lengths],
}
@torch.jit.export
def reorder_encoder_out(self, encoder_out: Dict[str, List[Tensor]], new_order):
"""
Reorder encoder output according to *new_order*.
Args:
encoder_out: output from the ``forward()`` method
new_order (LongTensor): desired order
Returns:
*encoder_out* rearranged according to *new_order*
"""
if len(encoder_out["encoder_out"]) == 0:
new_encoder_out = []
else:
new_encoder_out = [encoder_out["encoder_out"][0].index_select(1, new_order)]
if len(encoder_out["encoder_padding_mask"]) == 0:
new_encoder_padding_mask = []
else:
new_encoder_padding_mask = [
encoder_out["encoder_padding_mask"][0].index_select(0, new_order)
]
if len(encoder_out["encoder_embedding"]) == 0:
new_encoder_embedding = []
else:
new_encoder_embedding = [
encoder_out["encoder_embedding"][0].index_select(0, new_order)
]
if len(encoder_out["src_tokens"]) == 0:
src_tokens = []
else:
src_tokens = [(encoder_out["src_tokens"][0]).index_select(0, new_order)]
if len(encoder_out["src_lengths"]) == 0:
src_lengths = []
else:
src_lengths = [(encoder_out["src_lengths"][0]).index_select(0, new_order)]
encoder_states = encoder_out["encoder_states"]
if len(encoder_states) > 0:
for idx, state in enumerate(encoder_states):
encoder_states[idx] = state.index_select(1, new_order)
return {
"encoder_out": new_encoder_out, # T x B x C
"encoder_padding_mask": new_encoder_padding_mask, # B x T
"encoder_embedding": new_encoder_embedding, # B x T x C
"encoder_states": encoder_states, # List[T x B x C]
"src_tokens": src_tokens, # B x T
"src_lengths": src_lengths, # B x 1
}
def max_positions(self):
"""Maximum input length supported by the encoder."""
if self.embed_positions is None:
return self.max_source_positions
return min(self.max_source_positions, self.embed_positions.max_positions)
def upgrade_state_dict_named(self, state_dict, name):
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
if isinstance(self.embed_positions, SinusoidalPositionalEmbedding):
weights_key = "{}.embed_positions.weights".format(name)
if weights_key in state_dict:
print("deleting {0}".format(weights_key))
del state_dict[weights_key]
state_dict[
"{}.embed_positions._float_tensor".format(name)
] = torch.FloatTensor(1)
for i in range(self.num_layers):
# update layer norms
self.layers[i].upgrade_state_dict_named(
state_dict, "{}.layers.{}".format(name, i)
)
version_key = "{}.version".format(name)
if utils.item(state_dict.get(version_key, torch.Tensor([1]))[0]) < 2:
# earlier checkpoints did not normalize after the stack of layers
self.layer_norm = None
self.normalize = False
state_dict[version_key] = torch.Tensor([1])
return state_dict
class TransformerEncoder(TransformerEncoderBase):
def __init__(self, args, dictionary, embed_tokens):
self.args = args
super().__init__(
TransformerConfig.from_namespace(args),
dictionary,
embed_tokens,
)
def build_encoder_layer(self, args):
return super().build_encoder_layer(
TransformerConfig.from_namespace(args),
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/transformer_encoder.py
|
# Copyright (c) Facebook Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""isort:skip_file"""
from .transformer_config import (
TransformerConfig,
DEFAULT_MAX_SOURCE_POSITIONS,
DEFAULT_MAX_TARGET_POSITIONS,
DEFAULT_MIN_PARAMS_TO_WRAP,
)
from .transformer_decoder import TransformerDecoder, TransformerDecoderBase, Linear
from .transformer_encoder import TransformerEncoder, TransformerEncoderBase
from .transformer_legacy import (
TransformerModel,
base_architecture,
tiny_architecture,
transformer_iwslt_de_en,
transformer_wmt_en_de,
transformer_vaswani_wmt_en_de_big,
transformer_vaswani_wmt_en_fr_big,
transformer_wmt_en_de_big,
transformer_wmt_en_de_big_t2t,
)
from .transformer_base import TransformerModelBase, Embedding
__all__ = [
"TransformerModelBase",
"TransformerConfig",
"TransformerDecoder",
"TransformerDecoderBase",
"TransformerEncoder",
"TransformerEncoderBase",
"TransformerModel",
"Embedding",
"Linear",
"base_architecture",
"tiny_architecture",
"transformer_iwslt_de_en",
"transformer_wmt_en_de",
"transformer_vaswani_wmt_en_de_big",
"transformer_vaswani_wmt_en_fr_big",
"transformer_wmt_en_de_big",
"transformer_wmt_en_de_big_t2t",
"DEFAULT_MAX_SOURCE_POSITIONS",
"DEFAULT_MAX_TARGET_POSITIONS",
"DEFAULT_MIN_PARAMS_TO_WRAP",
]
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from typing import Any, Dict, List, Optional
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.distributed import fsdp_wrap
from fairseq.models import FairseqIncrementalDecoder
from fairseq.models.transformer import TransformerConfig
from fairseq.modules import (
AdaptiveSoftmax,
BaseLayer,
FairseqDropout,
LayerDropModuleList,
LayerNorm,
PositionalEmbedding,
SinusoidalPositionalEmbedding,
)
from fairseq.modules import transformer_layer
from fairseq.modules.checkpoint_activations import checkpoint_wrapper
from fairseq.modules.quant_noise import quant_noise as apply_quant_noise_
from torch import Tensor
# rewrite name for backward compatibility in `make_generation_fast_`
def module_name_fordropout(module_name: str) -> str:
if module_name == "TransformerDecoderBase":
return "TransformerDecoder"
else:
return module_name
class TransformerDecoderBase(FairseqIncrementalDecoder):
"""
Transformer decoder consisting of *cfg.decoder.layers* layers. Each layer
is a :class:`TransformerDecoderLayer`.
Args:
args (argparse.Namespace): parsed command-line arguments
dictionary (~fairseq.data.Dictionary): decoding dictionary
embed_tokens (torch.nn.Embedding): output embedding
no_encoder_attn (bool, optional): whether to attend to encoder outputs
(default: False).
"""
def __init__(
self,
cfg,
dictionary,
embed_tokens,
no_encoder_attn=False,
output_projection=None,
):
self.cfg = cfg
super().__init__(dictionary)
self.register_buffer("version", torch.Tensor([3]))
self._future_mask = torch.empty(0)
self.dropout_module = FairseqDropout(
cfg.dropout, module_name=module_name_fordropout(self.__class__.__name__)
)
self.decoder_layerdrop = cfg.decoder.layerdrop
self.share_input_output_embed = cfg.share_decoder_input_output_embed
input_embed_dim = embed_tokens.embedding_dim
embed_dim = cfg.decoder.embed_dim
self.embed_dim = embed_dim
self.output_embed_dim = cfg.decoder.output_dim
self.padding_idx = embed_tokens.padding_idx
self.max_target_positions = cfg.max_target_positions
self.embed_tokens = embed_tokens
self.embed_scale = 1.0 if cfg.no_scale_embedding else math.sqrt(embed_dim)
if not cfg.adaptive_input and cfg.quant_noise.pq > 0:
self.quant_noise = apply_quant_noise_(
nn.Linear(embed_dim, embed_dim, bias=False),
cfg.quant_noise.pq,
cfg.quant_noise.pq_block_size,
)
else:
self.quant_noise = None
self.project_in_dim = (
Linear(input_embed_dim, embed_dim, bias=False)
if embed_dim != input_embed_dim
else None
)
self.embed_positions = (
PositionalEmbedding(
self.max_target_positions,
embed_dim,
self.padding_idx,
learned=cfg.decoder.learned_pos,
)
if not cfg.no_token_positional_embeddings
else None
)
if cfg.layernorm_embedding:
self.layernorm_embedding = LayerNorm(embed_dim, export=cfg.export)
else:
self.layernorm_embedding = None
self.cross_self_attention = cfg.cross_self_attention
if self.decoder_layerdrop > 0.0:
self.layers = LayerDropModuleList(p=self.decoder_layerdrop)
else:
self.layers = nn.ModuleList([])
self.layers.extend(
[
self.build_decoder_layer(cfg, no_encoder_attn)
for _ in range(cfg.decoder.layers)
]
)
self.num_layers = len(self.layers)
if cfg.decoder.normalize_before and not cfg.no_decoder_final_norm:
self.layer_norm = LayerNorm(embed_dim, export=cfg.export)
else:
self.layer_norm = None
self.project_out_dim = (
Linear(embed_dim, self.output_embed_dim, bias=False)
if embed_dim != self.output_embed_dim and not cfg.tie_adaptive_weights
else None
)
self.adaptive_softmax = None
self.output_projection = output_projection
if self.output_projection is None:
self.build_output_projection(cfg, dictionary, embed_tokens)
if utils.safe_getattr(cfg, 'deepnet', False):
self.rescale_decoder_only_parameters(cfg)
def rescale_decoder_only_parameters(self, cfg):
def rescale(param, layer_id):
param.mul_(math.sqrt(math.log(len(self.layers) * 2)))
# param.div_(math.sqrt(2.0 * layer_id))
for layer_id in range(len(self.layers)):
layer = self.layers[layer_id]
rescale(layer.self_attn.out_proj.weight.data, layer_id + 1)
rescale(layer.self_attn.v_proj.weight.data, layer_id + 1)
rescale(layer.fc1.weight.data, layer_id + 1)
rescale(layer.fc2.weight.data, layer_id + 1)
return
def build_output_projection(self, cfg, dictionary, embed_tokens):
if cfg.adaptive_softmax_cutoff is not None:
self.adaptive_softmax = AdaptiveSoftmax(
len(dictionary),
self.output_embed_dim,
utils.eval_str_list(cfg.adaptive_softmax_cutoff, type=int),
dropout=cfg.adaptive_softmax_dropout,
adaptive_inputs=embed_tokens if cfg.tie_adaptive_weights else None,
factor=cfg.adaptive_softmax_factor,
tie_proj=cfg.tie_adaptive_proj,
)
elif self.share_input_output_embed:
self.output_projection = nn.Linear(
self.embed_tokens.weight.shape[1],
self.embed_tokens.weight.shape[0],
bias=False,
)
self.output_projection.weight = self.embed_tokens.weight
else:
self.output_projection = nn.Linear(
self.output_embed_dim, len(dictionary), bias=False
)
nn.init.normal_(
self.output_projection.weight, mean=0, std=self.output_embed_dim ** -0.5
)
num_base_layers = cfg.base_layers
for i in range(num_base_layers):
self.layers.insert(
((i + 1) * cfg.decoder.layers) // (num_base_layers + 1),
BaseLayer(cfg),
)
def build_decoder_layer(self, cfg, no_encoder_attn=False):
layer = transformer_layer.TransformerDecoderLayerBase(cfg, no_encoder_attn)
checkpoint = cfg.checkpoint_activations
if checkpoint:
offload_to_cpu = cfg.offload_activations
layer = checkpoint_wrapper(layer, offload_to_cpu=offload_to_cpu)
# if we are checkpointing, enforce that FSDP always wraps the
# checkpointed layer, regardless of layer size
min_params_to_wrap = cfg.min_params_to_wrap if not checkpoint else 0
layer = fsdp_wrap(layer, min_num_params=min_params_to_wrap)
return layer
def forward(
self,
prev_output_tokens,
encoder_out: Optional[Dict[str, List[Tensor]]] = None,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
features_only: bool = False,
full_context_alignment: bool = False,
alignment_layer: Optional[int] = None,
alignment_heads: Optional[int] = None,
src_lengths: Optional[Any] = None,
return_all_hiddens: bool = False,
):
"""
Args:
prev_output_tokens (LongTensor): previous decoder outputs of shape
`(batch, tgt_len)`, for teacher forcing
encoder_out (optional): output from the encoder, used for
encoder-side attention, should be of size T x B x C
incremental_state (dict): dictionary used for storing state during
:ref:`Incremental decoding`
features_only (bool, optional): only return features without
applying output layer (default: False).
full_context_alignment (bool, optional): don't apply
auto-regressive mask to self-attention (default: False).
Returns:
tuple:
- the decoder's output of shape `(batch, tgt_len, vocab)`
- a dictionary with any model-specific outputs
"""
x, extra = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
incremental_state=incremental_state,
full_context_alignment=full_context_alignment,
alignment_layer=alignment_layer,
alignment_heads=alignment_heads,
)
if not features_only:
x = self.output_layer(x)
return x, extra
def extract_features(
self,
prev_output_tokens,
encoder_out: Optional[Dict[str, List[Tensor]]],
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
full_context_alignment: bool = False,
alignment_layer: Optional[int] = None,
alignment_heads: Optional[int] = None,
):
return self.extract_features_scriptable(
prev_output_tokens,
encoder_out,
incremental_state,
full_context_alignment,
alignment_layer,
alignment_heads,
)
"""
A scriptable subclass of this class has an extract_features method and calls
super().extract_features, but super() is not supported in torchscript. A copy of
this function is made to be used in the subclass instead.
"""
def extract_features_scriptable(
self,
prev_output_tokens,
encoder_out: Optional[Dict[str, List[Tensor]]],
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
full_context_alignment: bool = False,
alignment_layer: Optional[int] = None,
alignment_heads: Optional[int] = None,
):
"""
Similar to *forward* but only return features.
Includes several features from "Jointly Learning to Align and
Translate with Transformer Models" (Garg et al., EMNLP 2019).
Args:
full_context_alignment (bool, optional): don't apply
auto-regressive mask to self-attention (default: False).
alignment_layer (int, optional): return mean alignment over
heads at this layer (default: last layer).
alignment_heads (int, optional): only average alignment over
this many heads (default: all heads).
Returns:
tuple:
- the decoder's features of shape `(batch, tgt_len, embed_dim)`
- a dictionary with any model-specific outputs
"""
bs, slen = prev_output_tokens.size()
if alignment_layer is None:
alignment_layer = self.num_layers - 1
enc: Optional[Tensor] = None
padding_mask: Optional[Tensor] = None
if encoder_out is not None and len(encoder_out["encoder_out"]) > 0:
enc = encoder_out["encoder_out"][0]
assert (
enc.size()[1] == bs
), f"Expected enc.shape == (t, {bs}, c) got {enc.shape}"
if encoder_out is not None and len(encoder_out["encoder_padding_mask"]) > 0:
padding_mask = encoder_out["encoder_padding_mask"][0]
# embed positions
positions = None
if self.embed_positions is not None:
positions = self.embed_positions(
prev_output_tokens, incremental_state=incremental_state
)
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
if positions is not None:
positions = positions[:, -1:]
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.quant_noise is not None:
x = self.quant_noise(x)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
if positions is not None:
x += positions
if self.layernorm_embedding is not None:
x = self.layernorm_embedding(x)
x = self.dropout_module(x)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
self_attn_padding_mask: Optional[Tensor] = None
if self.cross_self_attention or prev_output_tokens.eq(self.padding_idx).any():
self_attn_padding_mask = prev_output_tokens.eq(self.padding_idx)
# decoder layers
attn: Optional[Tensor] = None
inner_states: List[Optional[Tensor]] = [x]
for idx, layer in enumerate(self.layers):
if incremental_state is None and not full_context_alignment:
self_attn_mask = self.buffered_future_mask(x)
else:
self_attn_mask = None
x, layer_attn, _ = layer(
x,
enc,
padding_mask,
incremental_state,
self_attn_mask=self_attn_mask,
self_attn_padding_mask=self_attn_padding_mask,
need_attn=bool((idx == alignment_layer)),
need_head_weights=bool((idx == alignment_layer)),
)
inner_states.append(x)
if layer_attn is not None and idx == alignment_layer:
attn = layer_attn.float().to(x)
if attn is not None:
if alignment_heads is not None:
attn = attn[:alignment_heads]
# average probabilities over heads
attn = attn.mean(dim=0)
if self.layer_norm is not None:
x = self.layer_norm(x)
if self.alpha is not None:
x = torch.mul(self.alpha, x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
if self.project_out_dim is not None:
x = self.project_out_dim(x)
return x, {"attn": [attn], "inner_states": inner_states}
def output_layer(self, features):
"""Project features to the vocabulary size."""
if self.adaptive_softmax is None:
# project back to size of vocabulary
return self.output_projection(features)
else:
return features
def max_positions(self):
"""Maximum output length supported by the decoder."""
if self.embed_positions is None:
return self.max_target_positions
return min(self.max_target_positions, self.embed_positions.max_positions)
def buffered_future_mask(self, tensor):
dim = tensor.size(0)
# self._future_mask.device != tensor.device is not working in TorchScript. This is a workaround.
if (
self._future_mask.size(0) == 0
or (not self._future_mask.device == tensor.device)
or self._future_mask.size(0) < dim
):
self._future_mask = torch.triu(
utils.fill_with_neg_inf(torch.zeros([dim, dim])), 1
)
self._future_mask = self._future_mask.to(tensor)
return self._future_mask[:dim, :dim]
def upgrade_state_dict_named(self, state_dict, name):
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
if isinstance(self.embed_positions, SinusoidalPositionalEmbedding):
weights_key = "{}.embed_positions.weights".format(name)
if weights_key in state_dict:
del state_dict[weights_key]
state_dict[
"{}.embed_positions._float_tensor".format(name)
] = torch.FloatTensor(1)
if f"{name}.output_projection.weight" not in state_dict:
if self.share_input_output_embed:
embed_out_key = f"{name}.embed_tokens.weight"
else:
embed_out_key = f"{name}.embed_out"
if embed_out_key in state_dict:
state_dict[f"{name}.output_projection.weight"] = state_dict[
embed_out_key
]
if not self.share_input_output_embed:
del state_dict[embed_out_key]
for i in range(self.num_layers):
# update layer norms
layer_norm_map = {
"0": "self_attn_layer_norm",
"1": "encoder_attn_layer_norm",
"2": "final_layer_norm",
}
for old, new in layer_norm_map.items():
for m in ("weight", "bias"):
k = "{}.layers.{}.layer_norms.{}.{}".format(name, i, old, m)
if k in state_dict:
state_dict[
"{}.layers.{}.{}.{}".format(name, i, new, m)
] = state_dict[k]
del state_dict[k]
version_key = "{}.version".format(name)
if utils.item(state_dict.get(version_key, torch.Tensor([1]))[0]) <= 2:
# earlier checkpoints did not normalize after the stack of layers
self.layer_norm = None
self.normalize = False
state_dict[version_key] = torch.Tensor([1])
return state_dict
def Linear(in_features, out_features, bias=True):
m = nn.Linear(in_features, out_features, bias)
nn.init.xavier_uniform_(m.weight)
if bias:
nn.init.constant_(m.bias, 0.0)
return m
class TransformerDecoder(TransformerDecoderBase):
def __init__(
self,
args,
dictionary,
embed_tokens,
no_encoder_attn=False,
output_projection=None,
):
self.args = args
super().__init__(
TransformerConfig.from_namespace(args),
dictionary,
embed_tokens,
no_encoder_attn=no_encoder_attn,
output_projection=output_projection,
)
def build_output_projection(self, args, dictionary, embed_tokens):
super().build_output_projection(
TransformerConfig.from_namespace(args), dictionary, embed_tokens
)
def build_decoder_layer(self, args, no_encoder_attn=False):
return super().build_decoder_layer(
TransformerConfig.from_namespace(args), no_encoder_attn=no_encoder_attn
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/transformer_decoder.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Dict, List, Optional, Tuple
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.dataclass.utils import gen_parser_from_dataclass
from fairseq.distributed import fsdp_wrap
from fairseq.models import FairseqEncoderDecoderModel
from fairseq.models.transformer import (
TransformerEncoderBase,
TransformerDecoderBase,
TransformerConfig,
)
from torch import Tensor
class TransformerModelBase(FairseqEncoderDecoderModel):
"""
Transformer model from `"Attention Is All You Need" (Vaswani, et al, 2017)
<https://arxiv.org/abs/1706.03762>`_.
Args:
encoder (TransformerEncoder): the encoder
decoder (TransformerDecoder): the decoder
The Transformer model provides the following named architectures and
command-line arguments:
.. argparse::
:ref: fairseq.models.transformer_parser
:prog:
"""
def __init__(self, cfg, encoder, decoder):
super().__init__(encoder, decoder)
self.cfg = cfg
self.supports_align_args = True
@classmethod
def add_args(cls, parser):
"""Add model-specific arguments to the parser."""
# we want to build the args recursively in this case.
gen_parser_from_dataclass(
parser, TransformerConfig(), delete_default=False, with_prefix=""
)
@classmethod
def build_model(cls, cfg, task):
"""Build a new model instance."""
# -- TODO T96535332
# bug caused by interaction between OmegaConf II and argparsing
cfg.decoder.input_dim = int(cfg.decoder.input_dim)
cfg.decoder.output_dim = int(cfg.decoder.output_dim)
# --
if cfg.encoder.layers_to_keep:
cfg.encoder.layers = len(cfg.encoder.layers_to_keep.split(","))
if cfg.decoder.layers_to_keep:
cfg.decoder.layers = len(cfg.decoder.layers_to_keep.split(","))
src_dict, tgt_dict = task.source_dictionary, task.target_dictionary
if cfg.share_all_embeddings:
if src_dict != tgt_dict:
raise ValueError("--share-all-embeddings requires a joined dictionary")
if cfg.encoder.embed_dim != cfg.decoder.embed_dim:
raise ValueError(
"--share-all-embeddings requires --encoder-embed-dim to match --decoder-embed-dim"
)
if cfg.decoder.embed_path and (
cfg.decoder.embed_path != cfg.encoder.embed_path
):
raise ValueError(
"--share-all-embeddings not compatible with --decoder-embed-path"
)
encoder_embed_tokens = cls.build_embedding(
cfg, src_dict, cfg.encoder.embed_dim, cfg.encoder.embed_path
)
decoder_embed_tokens = encoder_embed_tokens
cfg.share_decoder_input_output_embed = True
else:
encoder_embed_tokens = cls.build_embedding(
cfg, src_dict, cfg.encoder.embed_dim, cfg.encoder.embed_path
)
decoder_embed_tokens = cls.build_embedding(
cfg, tgt_dict, cfg.decoder.embed_dim, cfg.decoder.embed_path
)
if cfg.offload_activations:
cfg.checkpoint_activations = True # offloading implies checkpointing
encoder = cls.build_encoder(cfg, src_dict, encoder_embed_tokens)
decoder = cls.build_decoder(cfg, tgt_dict, decoder_embed_tokens)
if not cfg.share_all_embeddings:
# fsdp_wrap is a no-op when --ddp-backend != fully_sharded
encoder = fsdp_wrap(encoder, min_num_params=cfg.min_params_to_wrap)
decoder = fsdp_wrap(decoder, min_num_params=cfg.min_params_to_wrap)
return cls(cfg, encoder, decoder)
@classmethod
def build_embedding(cls, cfg, dictionary, embed_dim, path=None):
num_embeddings = len(dictionary)
padding_idx = dictionary.pad()
emb = Embedding(num_embeddings, embed_dim, padding_idx)
# if provided, load from preloaded dictionaries
if path:
embed_dict = utils.parse_embedding(path)
utils.load_embedding(embed_dict, dictionary, emb)
return emb
@classmethod
def build_encoder(cls, cfg, src_dict, embed_tokens):
return TransformerEncoderBase(cfg, src_dict, embed_tokens)
@classmethod
def build_decoder(cls, cfg, tgt_dict, embed_tokens):
return TransformerDecoderBase(
cfg,
tgt_dict,
embed_tokens,
no_encoder_attn=cfg.no_cross_attention,
)
# TorchScript doesn't support optional arguments with variable length (**kwargs).
# Current workaround is to add union of all arguments in child classes.
def forward(
self,
src_tokens,
src_lengths,
prev_output_tokens,
return_all_hiddens: bool = True,
features_only: bool = False,
alignment_layer: Optional[int] = None,
alignment_heads: Optional[int] = None,
):
"""
Run the forward pass for an encoder-decoder model.
Copied from the base class, but without ``**kwargs``,
which are not supported by TorchScript.
"""
encoder_out = self.encoder(
src_tokens, src_lengths=src_lengths, return_all_hiddens=return_all_hiddens
)
decoder_out = self.decoder(
prev_output_tokens,
encoder_out=encoder_out,
features_only=features_only,
alignment_layer=alignment_layer,
alignment_heads=alignment_heads,
src_lengths=src_lengths,
return_all_hiddens=return_all_hiddens,
)
return decoder_out
# Since get_normalized_probs is in the Fairseq Model which is not scriptable,
# I rewrite the get_normalized_probs from Base Class to call the
# helper function in the Base Class.
@torch.jit.export
def get_normalized_probs(
self,
net_output: Tuple[Tensor, Optional[Dict[str, List[Optional[Tensor]]]]],
log_probs: bool,
sample: Optional[Dict[str, Tensor]] = None,
):
"""Get normalized probabilities (or log probs) from a net's output."""
return self.get_normalized_probs_scriptable(net_output, log_probs, sample)
def Embedding(num_embeddings, embedding_dim, padding_idx):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
return m
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/transformer/transformer_base.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
from fairseq.utils import new_arange
# -------------- Helper Functions --------------------------------------------------- #
def load_libnat():
try:
from fairseq import libnat_cuda
return libnat_cuda, True
except ImportError as e:
print(str(e) + "... fall back to CPU version")
try:
from fairseq import libnat
return libnat, False
except ImportError as e:
import sys
sys.stderr.write(
"ERROR: missing libnat_cuda. run `python setup.py build_ext --inplace`\n"
)
raise e
def _get_ins_targets(in_tokens, out_tokens, padding_idx, unk_idx):
libnat, use_cuda = load_libnat()
def _get_ins_targets_cuda(in_tokens, out_tokens, padding_idx, unk_idx):
in_masks = in_tokens.ne(padding_idx)
out_masks = out_tokens.ne(padding_idx)
mask_ins_targets, masked_tgt_masks = libnat.generate_insertion_labels(
out_tokens.int(),
libnat.levenshtein_distance(
in_tokens.int(),
out_tokens.int(),
in_masks.sum(1).int(),
out_masks.sum(1).int(),
),
)
masked_tgt_masks = masked_tgt_masks.bool() & out_masks
mask_ins_targets = mask_ins_targets.type_as(in_tokens)[
:, 1 : in_masks.size(1)
].masked_fill_(~in_masks[:, 1:], 0)
masked_tgt_tokens = out_tokens.masked_fill(masked_tgt_masks, unk_idx)
return masked_tgt_masks, masked_tgt_tokens, mask_ins_targets
def _get_ins_targets_cpu(in_tokens, out_tokens, padding_idx, unk_idx):
in_seq_len, out_seq_len = in_tokens.size(1), out_tokens.size(1)
in_tokens_list = [
[t for t in s if t != padding_idx] for i, s in enumerate(in_tokens.tolist())
]
out_tokens_list = [
[t for t in s if t != padding_idx]
for i, s in enumerate(out_tokens.tolist())
]
full_labels = libnat.suggested_ed2_path(
in_tokens_list, out_tokens_list, padding_idx
)
mask_inputs = [
[len(c) if c[0] != padding_idx else 0 for c in a[:-1]] for a in full_labels
]
# generate labels
masked_tgt_masks = []
for mask_input in mask_inputs:
mask_label = []
for beam_size in mask_input[1:-1]: # HACK 1:-1
mask_label += [0] + [1 for _ in range(beam_size)]
masked_tgt_masks.append(
mask_label + [0 for _ in range(out_seq_len - len(mask_label))]
)
mask_ins_targets = [
mask_input[1:-1]
+ [0 for _ in range(in_seq_len - 1 - len(mask_input[1:-1]))]
for mask_input in mask_inputs
]
# transform to tensor
masked_tgt_masks = torch.tensor(
masked_tgt_masks, device=out_tokens.device
).bool()
mask_ins_targets = torch.tensor(mask_ins_targets, device=in_tokens.device)
masked_tgt_tokens = out_tokens.masked_fill(masked_tgt_masks, unk_idx)
return masked_tgt_masks, masked_tgt_tokens, mask_ins_targets
if use_cuda:
return _get_ins_targets_cuda(in_tokens, out_tokens, padding_idx, unk_idx)
return _get_ins_targets_cpu(in_tokens, out_tokens, padding_idx, unk_idx)
def _get_del_targets(in_tokens, out_tokens, padding_idx):
libnat, use_cuda = load_libnat()
def _get_del_targets_cuda(in_tokens, out_tokens, padding_idx):
in_masks = in_tokens.ne(padding_idx)
out_masks = out_tokens.ne(padding_idx)
word_del_targets = libnat.generate_deletion_labels(
in_tokens.int(),
libnat.levenshtein_distance(
in_tokens.int(),
out_tokens.int(),
in_masks.sum(1).int(),
out_masks.sum(1).int(),
),
)
word_del_targets = word_del_targets.type_as(in_tokens).masked_fill_(
~in_masks, 0
)
return word_del_targets
def _get_del_targets_cpu(in_tokens, out_tokens, padding_idx):
out_seq_len = out_tokens.size(1)
with torch.cuda.device_of(in_tokens):
in_tokens_list = [
[t for t in s if t != padding_idx]
for i, s in enumerate(in_tokens.tolist())
]
out_tokens_list = [
[t for t in s if t != padding_idx]
for i, s in enumerate(out_tokens.tolist())
]
full_labels = libnat.suggested_ed2_path(
in_tokens_list, out_tokens_list, padding_idx
)
word_del_targets = [b[-1] for b in full_labels]
word_del_targets = [
labels + [0 for _ in range(out_seq_len - len(labels))]
for labels in word_del_targets
]
# transform to tensor
word_del_targets = torch.tensor(word_del_targets, device=out_tokens.device)
return word_del_targets
if use_cuda:
return _get_del_targets_cuda(in_tokens, out_tokens, padding_idx)
return _get_del_targets_cpu(in_tokens, out_tokens, padding_idx)
def _apply_ins_masks(
in_tokens, in_scores, mask_ins_pred, padding_idx, unk_idx, eos_idx
):
in_masks = in_tokens.ne(padding_idx)
in_lengths = in_masks.sum(1)
# HACK: hacky way to shift all the paddings to eos first.
in_tokens.masked_fill_(~in_masks, eos_idx)
mask_ins_pred.masked_fill_(~in_masks[:, 1:], 0)
out_lengths = in_lengths + mask_ins_pred.sum(1)
out_max_len = out_lengths.max()
out_masks = new_arange(out_lengths, out_max_len)[None, :] < out_lengths[:, None]
reordering = (mask_ins_pred + in_masks[:, 1:].long()).cumsum(1)
out_tokens = (
in_tokens.new_zeros(in_tokens.size(0), out_max_len)
.fill_(padding_idx)
.masked_fill_(out_masks, unk_idx)
)
out_tokens[:, 0] = in_tokens[:, 0]
out_tokens.scatter_(1, reordering, in_tokens[:, 1:])
out_scores = None
if in_scores is not None:
in_scores.masked_fill_(~in_masks, 0)
out_scores = in_scores.new_zeros(*out_tokens.size())
out_scores[:, 0] = in_scores[:, 0]
out_scores.scatter_(1, reordering, in_scores[:, 1:])
return out_tokens, out_scores
def _apply_ins_words(in_tokens, in_scores, word_ins_pred, word_ins_scores, unk_idx):
word_ins_masks = in_tokens.eq(unk_idx)
out_tokens = in_tokens.masked_scatter(word_ins_masks, word_ins_pred[word_ins_masks])
if in_scores is not None:
out_scores = in_scores.masked_scatter(
word_ins_masks, word_ins_scores[word_ins_masks]
)
else:
out_scores = None
return out_tokens, out_scores
def _apply_del_words(
in_tokens, in_scores, in_attn, word_del_pred, padding_idx, bos_idx, eos_idx
):
# apply deletion to a tensor
in_masks = in_tokens.ne(padding_idx)
bos_eos_masks = in_tokens.eq(bos_idx) | in_tokens.eq(eos_idx)
max_len = in_tokens.size(1)
word_del_pred.masked_fill_(~in_masks, 1)
word_del_pred.masked_fill_(bos_eos_masks, 0)
reordering = new_arange(in_tokens).masked_fill_(word_del_pred, max_len).sort(1)[1]
out_tokens = in_tokens.masked_fill(word_del_pred, padding_idx).gather(1, reordering)
out_scores = None
if in_scores is not None:
out_scores = in_scores.masked_fill(word_del_pred, 0).gather(1, reordering)
out_attn = None
if in_attn is not None:
_mask = word_del_pred[:, :, None].expand_as(in_attn)
_reordering = reordering[:, :, None].expand_as(in_attn)
out_attn = in_attn.masked_fill(_mask, 0.0).gather(1, _reordering)
return out_tokens, out_scores, out_attn
def _skip(x, mask):
"""
Getting sliced (dim=0) tensor by mask. Supporting tensor and list/dict of tensors.
"""
if isinstance(x, int):
return x
if x is None:
return None
if isinstance(x, torch.Tensor):
if x.size(0) == mask.size(0):
return x[mask]
elif x.size(1) == mask.size(0):
return x[:, mask]
if isinstance(x, list):
return [_skip(x_i, mask) for x_i in x]
if isinstance(x, dict):
return {k: _skip(v, mask) for k, v in x.items()}
raise NotImplementedError
def _skip_encoder_out(encoder, encoder_out, mask):
if not mask.any():
return encoder_out
else:
return encoder.reorder_encoder_out(
encoder_out, mask.nonzero(as_tuple=False).squeeze()
)
def _fill(x, mask, y, padding_idx):
"""
Filling tensor x with y at masked positions (dim=0).
"""
if x is None:
return y
assert x.dim() == y.dim() and mask.size(0) == x.size(0)
assert x.dim() == 2 or (x.dim() == 3 and x.size(2) == y.size(2))
n_selected = mask.sum()
assert n_selected == y.size(0)
if n_selected == x.size(0):
return y
if x.size(1) < y.size(1):
dims = [x.size(0), y.size(1) - x.size(1)]
if x.dim() == 3:
dims.append(x.size(2))
x = torch.cat([x, x.new_zeros(*dims).fill_(padding_idx)], 1)
x[mask] = y
elif x.size(1) > y.size(1):
x[mask] = padding_idx
if x.dim() == 2:
x[mask, : y.size(1)] = y
else:
x[mask, : y.size(1), :] = y
else:
x[mask] = y
return x
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/levenshtein_utils.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import NATransformerModel
def _sequential_poisoning(s, V, beta=0.33, bos=2, eos=3, pad=1):
# s: input batch
# V: vocabulary size
rand_words = torch.randint(low=4, high=V, size=s.size(), device=s.device)
choices = torch.rand(size=s.size(), device=s.device)
choices.masked_fill_((s == pad) | (s == bos) | (s == eos), 1)
replace = choices < beta / 3
repeat = (choices >= beta / 3) & (choices < beta * 2 / 3)
swap = (choices >= beta * 2 / 3) & (choices < beta)
safe = choices >= beta
for i in range(s.size(1) - 1):
rand_word = rand_words[:, i]
next_word = s[:, i + 1]
self_word = s[:, i]
replace_i = replace[:, i]
swap_i = swap[:, i] & (next_word != 3)
repeat_i = repeat[:, i] & (next_word != 3)
safe_i = safe[:, i] | ((next_word == 3) & (~replace_i))
s[:, i] = (
self_word * (safe_i | repeat_i).long()
+ next_word * swap_i.long()
+ rand_word * replace_i.long()
)
s[:, i + 1] = (
next_word * (safe_i | replace_i).long()
+ self_word * (swap_i | repeat_i).long()
)
return s
def gumbel_noise(input, TINY=1e-8):
return (
input.new_zeros(*input.size())
.uniform_()
.add_(TINY)
.log_()
.neg_()
.add_(TINY)
.log_()
.neg_()
)
@register_model("iterative_nonautoregressive_transformer")
class IterNATransformerModel(NATransformerModel):
@staticmethod
def add_args(parser):
NATransformerModel.add_args(parser)
parser.add_argument(
"--train-step",
type=int,
help="number of refinement iterations during training",
)
parser.add_argument(
"--dae-ratio",
type=float,
help="the probability of switching to the denoising auto-encoder loss",
)
parser.add_argument(
"--stochastic-approx",
action="store_true",
help="sampling from the decoder as the inputs for next iteration",
)
@classmethod
def build_model(cls, args, task):
model = super().build_model(args, task)
model.train_step = getattr(args, "train_step", 4)
model.dae_ratio = getattr(args, "dae_ratio", 0.5)
model.stochastic_approx = getattr(args, "stochastic_approx", False)
return model
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
B, T = prev_output_tokens.size()
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# length prediction
length_out = self.decoder.forward_length(
normalize=False, encoder_out=encoder_out
)
length_tgt = self.decoder.forward_length_prediction(
length_out, encoder_out, tgt_tokens
)
# decoding
word_ins_outs, word_ins_tgts, word_ins_masks = [], [], []
for t in range(self.train_step):
word_ins_out = self.decoder(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
step=t,
)
word_ins_tgt = tgt_tokens
word_ins_mask = word_ins_tgt.ne(self.pad)
word_ins_outs.append(word_ins_out)
word_ins_tgts.append(word_ins_tgt)
word_ins_masks.append(word_ins_mask)
if t < (self.train_step - 1):
# prediction for next iteration
if self.stochastic_approx:
word_ins_prediction = (
word_ins_out + gumbel_noise(word_ins_out)
).max(-1)[1]
else:
word_ins_prediction = word_ins_out.max(-1)[1]
prev_output_tokens = prev_output_tokens.masked_scatter(
word_ins_mask, word_ins_prediction[word_ins_mask]
)
if self.dae_ratio > 0:
# we do not perform denoising for the first iteration
corrputed = (
torch.rand(size=(B,), device=prev_output_tokens.device)
< self.dae_ratio
)
corrputed_tokens = _sequential_poisoning(
tgt_tokens[corrputed],
len(self.tgt_dict),
0.33,
self.bos,
self.eos,
self.pad,
)
prev_output_tokens[corrputed] = corrputed_tokens
# concat everything
word_ins_out = torch.cat(word_ins_outs, 0)
word_ins_tgt = torch.cat(word_ins_tgts, 0)
word_ins_mask = torch.cat(word_ins_masks, 0)
return {
"word_ins": {
"out": word_ins_out,
"tgt": word_ins_tgt,
"mask": word_ins_mask,
"ls": self.args.label_smoothing,
"nll_loss": True,
},
"length": {
"out": length_out,
"tgt": length_tgt,
"factor": self.decoder.length_loss_factor,
},
}
@register_model_architecture(
"iterative_nonautoregressive_transformer", "iterative_nonautoregressive_transformer"
)
def inat_base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.apply_bert_init = getattr(args, "apply_bert_init", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
# --- special arguments ---
args.sg_length_pred = getattr(args, "sg_length_pred", False)
args.pred_length_offset = getattr(args, "pred_length_offset", False)
args.length_loss_factor = getattr(args, "length_loss_factor", 0.1)
args.ngram_predictor = getattr(args, "ngram_predictor", 1)
args.src_embedding_copy = getattr(args, "src_embedding_copy", False)
args.train_step = getattr(args, "train_step", 4)
args.dae_ratio = getattr(args, "dae_ratio", 0.5)
args.stochastic_approx = getattr(args, "stochastic_approx", False)
@register_model_architecture(
"iterative_nonautoregressive_transformer",
"iterative_nonautoregressive_transformer_wmt_en_de",
)
def iter_nat_wmt_en_de(args):
inat_base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/iterative_nonautoregressive_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
import torch
from fairseq.models.transformer import (
TransformerDecoder,
TransformerEncoder,
TransformerModel,
)
from fairseq.modules.transformer_sentence_encoder import init_bert_params
def ensemble_encoder(func):
def wrapper(self, *args, **kwargs):
if self.ensemble_models is None or len(self.ensemble_models) == 1:
return func(self, *args, **kwargs)
encoder_outs = [
func(model, *args, **kwargs, return_all_hiddens=True)
for model in self.ensemble_models
]
_encoder_out = encoder_outs[0].copy()
def stack(key):
outs = [e[key][0] for e in encoder_outs]
return [torch.stack(outs, -1) if outs[0] is not None else None]
_encoder_out["encoder_out"] = stack("encoder_out")
_encoder_out["encoder_embedding"] = stack("encoder_embedding")
num_layers = len(_encoder_out["encoder_states"])
if num_layers > 0:
_encoder_out["encoder_states"] = [
torch.stack([e["encoder_states"][i] for e in encoder_outs], -1)
for i in range(num_layers)
]
return _encoder_out
return wrapper
def ensemble_decoder(func):
def wrapper(self, normalize=False, encoder_out=None, *args, **kwargs):
if self.ensemble_models is None or len(self.ensemble_models) == 1:
return func(
self, normalize=normalize, encoder_out=encoder_out, *args, **kwargs
)
def _replace(encoder_out, new_val):
new_encoder_out = encoder_out.copy()
new_encoder_out["encoder_out"] = [new_val]
return new_encoder_out
action_outs = [
func(
model,
normalize=normalize,
encoder_out=_replace(
encoder_out, encoder_out["encoder_out"][0][:, :, :, i]
),
*args,
**kwargs
)
for i, model in enumerate(self.ensemble_models)
]
if not isinstance(action_outs[0], tuple): # return multiple values
action_outs = [[a] for a in action_outs]
else:
action_outs = [list(a) for a in action_outs]
ensembled_outs = []
for i in range(len(action_outs[0])):
if i == 0 and normalize:
ensembled_outs += [
torch.logsumexp(
torch.stack([a[i] for a in action_outs], -1), dim=-1
)
- math.log(len(self.ensemble_models))
]
elif action_outs[0][i] is not None:
ensembled_outs += [torch.stack([a[i] for a in action_outs], -1)]
else:
ensembled_outs += [None]
if len(ensembled_outs) == 1:
return ensembled_outs[0]
return tuple(ensembled_outs)
return wrapper
class FairseqNATModel(TransformerModel):
"""
Abstract class for all nonautoregressive-based models
"""
def __init__(self, args, encoder, decoder):
super().__init__(args, encoder, decoder)
self.tgt_dict = decoder.dictionary
self.bos = decoder.dictionary.bos()
self.eos = decoder.dictionary.eos()
self.pad = decoder.dictionary.pad()
self.unk = decoder.dictionary.unk()
self.ensemble_models = None
@property
def allow_length_beam(self):
return False
@property
def allow_ensemble(self):
return True
def enable_ensemble(self, models):
self.encoder.ensemble_models = [m.encoder for m in models]
self.decoder.ensemble_models = [m.decoder for m in models]
@staticmethod
def add_args(parser):
TransformerModel.add_args(parser)
parser.add_argument(
"--apply-bert-init",
action="store_true",
help="use custom param initialization for BERT",
)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
decoder = FairseqNATDecoder(args, tgt_dict, embed_tokens)
if getattr(args, "apply_bert_init", False):
decoder.apply(init_bert_params)
return decoder
@classmethod
def build_encoder(cls, args, src_dict, embed_tokens):
encoder = FairseqNATEncoder(args, src_dict, embed_tokens)
if getattr(args, "apply_bert_init", False):
encoder.apply(init_bert_params)
return encoder
def forward_encoder(self, encoder_inputs):
return self.encoder(*encoder_inputs)
def forward_decoder(self, *args, **kwargs):
return NotImplementedError
def initialize_output_tokens(self, *args, **kwargs):
return NotImplementedError
def forward(self, *args, **kwargs):
return NotImplementedError
class FairseqNATEncoder(TransformerEncoder):
def __init__(self, args, dictionary, embed_tokens):
super().__init__(args, dictionary, embed_tokens)
self.ensemble_models = None
@ensemble_encoder
def forward(self, *args, **kwargs):
return super().forward(*args, **kwargs)
class FairseqNATDecoder(TransformerDecoder):
def __init__(self, args, dictionary, embed_tokens, no_encoder_attn=False):
super().__init__(args, dictionary, embed_tokens, no_encoder_attn)
self.ensemble_models = None
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/fairseq_nat_model.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""isort:skip_file"""
from .fairseq_nat_model import *
from .nonautoregressive_transformer import *
from .nat_crf_transformer import *
from .iterative_nonautoregressive_transformer import *
from .cmlm_transformer import *
from .levenshtein_transformer import *
from .insertion_transformer import *
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq.iterative_refinement_generator import DecoderOut
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import FairseqNATDecoder, FairseqNATModel, ensemble_decoder
from fairseq.models.transformer import Embedding
from fairseq.modules import TransformerDecoderLayer
from fairseq.modules.transformer_sentence_encoder import init_bert_params
from .levenshtein_utils import (
_apply_del_words,
_apply_ins_masks,
_apply_ins_words,
_fill,
_get_del_targets,
_get_ins_targets,
_skip,
_skip_encoder_out,
)
@register_model("levenshtein_transformer")
class LevenshteinTransformerModel(FairseqNATModel):
@property
def allow_length_beam(self):
return False
@staticmethod
def add_args(parser):
FairseqNATModel.add_args(parser)
parser.add_argument(
"--early-exit",
default="6,6,6",
type=str,
help="number of decoder layers before word_del, mask_ins, word_ins",
)
parser.add_argument(
"--no-share-discriminator",
action="store_true",
help="separate parameters for discriminator",
)
parser.add_argument(
"--no-share-maskpredictor",
action="store_true",
help="separate parameters for mask-predictor",
)
parser.add_argument(
"--share-discriminator-maskpredictor",
action="store_true",
help="share the parameters for both mask-predictor and discriminator",
)
parser.add_argument(
"--sampling-for-deletion",
action="store_true",
help="instead of argmax, use sampling to predict the tokens",
)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
decoder = LevenshteinTransformerDecoder(args, tgt_dict, embed_tokens)
if getattr(args, "apply_bert_init", False):
decoder.apply(init_bert_params)
return decoder
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
assert tgt_tokens is not None, "forward function only supports training."
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# generate training labels for insertion
masked_tgt_masks, masked_tgt_tokens, mask_ins_targets = _get_ins_targets(
prev_output_tokens, tgt_tokens, self.pad, self.unk
)
mask_ins_targets = mask_ins_targets.clamp(min=0, max=255) # for safe prediction
mask_ins_masks = prev_output_tokens[:, 1:].ne(self.pad)
mask_ins_out, _ = self.decoder.forward_mask_ins(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
)
word_ins_out, _ = self.decoder.forward_word_ins(
normalize=False,
prev_output_tokens=masked_tgt_tokens,
encoder_out=encoder_out,
)
# make online prediction
if self.decoder.sampling_for_deletion:
word_predictions = torch.multinomial(
F.softmax(word_ins_out, -1).view(-1, word_ins_out.size(-1)), 1
).view(word_ins_out.size(0), -1)
else:
word_predictions = F.log_softmax(word_ins_out, dim=-1).max(2)[1]
word_predictions.masked_scatter_(
~masked_tgt_masks, tgt_tokens[~masked_tgt_masks]
)
# generate training labels for deletion
word_del_targets = _get_del_targets(word_predictions, tgt_tokens, self.pad)
word_del_out, _ = self.decoder.forward_word_del(
normalize=False,
prev_output_tokens=word_predictions,
encoder_out=encoder_out,
)
word_del_masks = word_predictions.ne(self.pad)
return {
"mask_ins": {
"out": mask_ins_out,
"tgt": mask_ins_targets,
"mask": mask_ins_masks,
"ls": 0.01,
},
"word_ins": {
"out": word_ins_out,
"tgt": tgt_tokens,
"mask": masked_tgt_masks,
"ls": self.args.label_smoothing,
"nll_loss": True,
},
"word_del": {
"out": word_del_out,
"tgt": word_del_targets,
"mask": word_del_masks,
},
}
def forward_decoder(
self, decoder_out, encoder_out, eos_penalty=0.0, max_ratio=None, **kwargs
):
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
attn = decoder_out.attn
history = decoder_out.history
bsz = output_tokens.size(0)
if max_ratio is None:
max_lens = torch.zeros_like(output_tokens).fill_(255)
else:
if not encoder_out["encoder_padding_mask"]:
max_src_len = encoder_out["encoder_out"].size(0)
src_lens = encoder_out["encoder_out"].new(bsz).fill_(max_src_len)
else:
src_lens = (~encoder_out["encoder_padding_mask"][0]).sum(1)
max_lens = (src_lens * max_ratio).clamp(min=10).long()
# delete words
# do not delete tokens if it is <s> </s>
can_del_word = output_tokens.ne(self.pad).sum(1) > 2
if can_del_word.sum() != 0: # we cannot delete, skip
word_del_score, word_del_attn = self.decoder.forward_word_del(
normalize=True,
prev_output_tokens=_skip(output_tokens, can_del_word),
encoder_out=_skip_encoder_out(self.encoder, encoder_out, can_del_word),
)
word_del_pred = word_del_score.max(-1)[1].bool()
_tokens, _scores, _attn = _apply_del_words(
output_tokens[can_del_word],
output_scores[can_del_word],
word_del_attn,
word_del_pred,
self.pad,
self.bos,
self.eos,
)
output_tokens = _fill(output_tokens, can_del_word, _tokens, self.pad)
output_scores = _fill(output_scores, can_del_word, _scores, 0)
attn = _fill(attn, can_del_word, _attn, 0.0)
if history is not None:
history.append(output_tokens.clone())
# insert placeholders
can_ins_mask = output_tokens.ne(self.pad).sum(1) < max_lens
if can_ins_mask.sum() != 0:
mask_ins_score, _ = self.decoder.forward_mask_ins(
normalize=True,
prev_output_tokens=_skip(output_tokens, can_ins_mask),
encoder_out=_skip_encoder_out(self.encoder, encoder_out, can_ins_mask),
)
if eos_penalty > 0.0:
mask_ins_score[:, :, 0] = mask_ins_score[:, :, 0] - eos_penalty
mask_ins_pred = mask_ins_score.max(-1)[1]
mask_ins_pred = torch.min(
mask_ins_pred, max_lens[can_ins_mask, None].expand_as(mask_ins_pred)
)
_tokens, _scores = _apply_ins_masks(
output_tokens[can_ins_mask],
output_scores[can_ins_mask],
mask_ins_pred,
self.pad,
self.unk,
self.eos,
)
output_tokens = _fill(output_tokens, can_ins_mask, _tokens, self.pad)
output_scores = _fill(output_scores, can_ins_mask, _scores, 0)
if history is not None:
history.append(output_tokens.clone())
# insert words
can_ins_word = output_tokens.eq(self.unk).sum(1) > 0
if can_ins_word.sum() != 0:
word_ins_score, word_ins_attn = self.decoder.forward_word_ins(
normalize=True,
prev_output_tokens=_skip(output_tokens, can_ins_word),
encoder_out=_skip_encoder_out(self.encoder, encoder_out, can_ins_word),
)
word_ins_score, word_ins_pred = word_ins_score.max(-1)
_tokens, _scores = _apply_ins_words(
output_tokens[can_ins_word],
output_scores[can_ins_word],
word_ins_pred,
word_ins_score,
self.unk,
)
output_tokens = _fill(output_tokens, can_ins_word, _tokens, self.pad)
output_scores = _fill(output_scores, can_ins_word, _scores, 0)
attn = _fill(attn, can_ins_word, word_ins_attn, 0.0)
if history is not None:
history.append(output_tokens.clone())
# delete some unnecessary paddings
cut_off = output_tokens.ne(self.pad).sum(1).max()
output_tokens = output_tokens[:, :cut_off]
output_scores = output_scores[:, :cut_off]
attn = None if attn is None else attn[:, :cut_off, :]
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=attn,
history=history,
)
def initialize_output_tokens(self, encoder_out, src_tokens):
initial_output_tokens = src_tokens.new_zeros(src_tokens.size(0), 2)
initial_output_tokens[:, 0] = self.bos
initial_output_tokens[:, 1] = self.eos
initial_output_scores = initial_output_tokens.new_zeros(
*initial_output_tokens.size()
).type_as(encoder_out["encoder_out"][0])
return DecoderOut(
output_tokens=initial_output_tokens,
output_scores=initial_output_scores,
attn=None,
step=0,
max_step=0,
history=None,
)
class LevenshteinTransformerDecoder(FairseqNATDecoder):
def __init__(self, args, dictionary, embed_tokens, no_encoder_attn=False):
super().__init__(
args, dictionary, embed_tokens, no_encoder_attn=no_encoder_attn
)
self.dictionary = dictionary
self.bos = dictionary.bos()
self.unk = dictionary.unk()
self.eos = dictionary.eos()
self.sampling_for_deletion = getattr(args, "sampling_for_deletion", False)
self.embed_mask_ins = Embedding(256, self.output_embed_dim * 2, None)
self.embed_word_del = Embedding(2, self.output_embed_dim, None)
# del_word, ins_mask, ins_word
self.early_exit = [int(i) for i in args.early_exit.split(",")]
assert len(self.early_exit) == 3
# copy layers for mask-predict/deletion
self.layers_msk = None
if getattr(args, "no_share_maskpredictor", False):
self.layers_msk = nn.ModuleList(
[
TransformerDecoderLayer(args, no_encoder_attn)
for _ in range(self.early_exit[1])
]
)
self.layers_del = None
if getattr(args, "no_share_discriminator", False):
self.layers_del = nn.ModuleList(
[
TransformerDecoderLayer(args, no_encoder_attn)
for _ in range(self.early_exit[0])
]
)
if getattr(args, "share_discriminator_maskpredictor", False):
assert getattr(
args, "no_share_discriminator", False
), "must set saperate discriminator"
self.layers_msk = self.layers_del
def extract_features(
self,
prev_output_tokens,
encoder_out=None,
early_exit=None,
layers=None,
**unused
):
"""
Similar to *forward* but only return features.
Inputs:
prev_output_tokens: Tensor(B, T)
encoder_out: a dictionary of hidden states and masks
Returns:
tuple:
- the decoder's features of shape `(batch, tgt_len, embed_dim)`
- a dictionary with any model-specific outputs
the LevenshteinTransformer decoder has full-attention to all generated tokens
"""
# embed positions
positions = (
self.embed_positions(prev_output_tokens)
if self.embed_positions is not None
else None
)
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
if positions is not None:
x += positions
x = self.dropout_module(x)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
attn = None
inner_states = [x]
# decoder layers
decoder_padding_mask = prev_output_tokens.eq(self.padding_idx)
layers = self.layers if layers is None else layers
early_exit = len(layers) if early_exit is None else early_exit
for _, layer in enumerate(layers[:early_exit]):
x, attn, _ = layer(
x,
encoder_out["encoder_out"][0]
if (encoder_out is not None and len(encoder_out["encoder_out"]) > 0)
else None,
encoder_out["encoder_padding_mask"][0]
if (
encoder_out is not None
and len(encoder_out["encoder_padding_mask"]) > 0
)
else None,
self_attn_mask=None,
self_attn_padding_mask=decoder_padding_mask,
)
inner_states.append(x)
if self.layer_norm:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
if self.project_out_dim is not None:
x = self.project_out_dim(x)
return x, {"attn": attn, "inner_states": inner_states}
@ensemble_decoder
def forward_mask_ins(self, normalize, encoder_out, prev_output_tokens, **unused):
features, extra = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
early_exit=self.early_exit[1],
layers=self.layers_msk,
**unused
)
features_cat = torch.cat([features[:, :-1, :], features[:, 1:, :]], 2)
decoder_out = F.linear(features_cat, self.embed_mask_ins.weight)
if normalize:
return F.log_softmax(decoder_out, -1), extra["attn"]
return decoder_out, extra["attn"]
@ensemble_decoder
def forward_word_ins(self, normalize, encoder_out, prev_output_tokens, **unused):
features, extra = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
early_exit=self.early_exit[2],
layers=self.layers,
**unused
)
decoder_out = self.output_layer(features)
if normalize:
return F.log_softmax(decoder_out, -1), extra["attn"]
return decoder_out, extra["attn"]
@ensemble_decoder
def forward_word_del(self, normalize, encoder_out, prev_output_tokens, **unused):
features, extra = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
early_exit=self.early_exit[0],
layers=self.layers_del,
**unused
)
decoder_out = F.linear(features, self.embed_word_del.weight)
if normalize:
return F.log_softmax(decoder_out, -1), extra["attn"]
return decoder_out, extra["attn"]
@register_model_architecture("levenshtein_transformer", "levenshtein_transformer")
def levenshtein_base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.apply_bert_init = getattr(args, "apply_bert_init", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.sampling_for_deletion = getattr(args, "sampling_for_deletion", False)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
args.early_exit = getattr(args, "early_exit", "6,6,6")
args.no_share_discriminator = getattr(args, "no_share_discriminator", False)
args.no_share_maskpredictor = getattr(args, "no_share_maskpredictor", False)
args.share_discriminator_maskpredictor = getattr(
args, "share_discriminator_maskpredictor", False
)
args.no_share_last_layer = getattr(args, "no_share_last_layer", False)
@register_model_architecture(
"levenshtein_transformer", "levenshtein_transformer_wmt_en_de"
)
def levenshtein_transformer_wmt_en_de(args):
levenshtein_base_architecture(args)
# similar parameters used in the "Attention Is All You Need" paper (Vaswani et al., 2017)
@register_model_architecture(
"levenshtein_transformer", "levenshtein_transformer_vaswani_wmt_en_de_big"
)
def levenshtein_transformer_vaswani_wmt_en_de_big(args):
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 1024)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 4096)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 16)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 1024)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 4096)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 16)
args.dropout = getattr(args, "dropout", 0.3)
levenshtein_base_architecture(args)
# default parameters used in tensor2tensor implementation
@register_model_architecture(
"levenshtein_transformer", "levenshtein_transformer_wmt_en_de_big"
)
def levenshtein_transformer_wmt_en_de_big_t2t(args):
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", True)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", True)
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
args.activation_dropout = getattr(args, "activation_dropout", 0.1)
levenshtein_transformer_vaswani_wmt_en_de_big(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/levenshtein_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
import torch
import torch.nn.functional as F
from fairseq.models.nat import (
_apply_del_words,
_apply_ins_masks,
_apply_ins_words,
_fill,
_skip,
_skip_encoder_out,
)
class _EnsembleModelEncoder(object):
def __init__(self, models):
self.models = models
def reorder_encoder_out(self, encoder_outs, new_order):
encoder_outs = [
model.encoder.reorder_encoder_out(encoder_out, new_order)
for model, encoder_out in zip(self.models, encoder_outs)
]
return encoder_outs
class BasicEnsembleModel(torch.nn.Module):
"""A wrapper around an ensemble of models."""
def __init__(self, models):
super().__init__()
self.models = torch.nn.ModuleList(models)
self.bos = self.models[0].decoder.dictionary.bos()
self.eos = self.models[0].decoder.dictionary.eos()
self.pad = self.models[0].decoder.dictionary.pad()
self.unk = self.models[0].decoder.dictionary.unk()
self.encoder = _EnsembleModelEncoder(self.models)
def has_encoder(self):
return hasattr(self.models[0], "encoder")
def max_decoder_positions(self):
return min(m.max_decoder_positions() for m in self.models)
@torch.no_grad()
def forward_encoder(self, encoder_input):
if not self.has_encoder():
return None
return [model.forward_encoder(encoder_input) for model in self.models]
@torch.no_grad()
def forward_decoder(self, *inputs):
raise NotImplementedError
def initialize_output_tokens(self, *inputs):
raise NotImplementedError
class EnsembleLevT(BasicEnsembleModel):
"""A wrapper around an ensemble of models."""
def __init__(self, models):
super().__init__(models)
@torch.no_grad()
def forward_decoder(
self, decoder_out, encoder_outs, eos_penalty=0.0, max_ratio=None, **kwargs
):
# LevT ensembling
# A pipeline of three steps: deletion, placeholder, and word insertion.
# We need to average scores in each step in a pipeline way because of dependence.
# deletion
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
attn = decoder_out.attn
bsz = output_tokens.size(0)
if max_ratio is None:
max_lens = output_tokens.new().fill_(255)
else:
if not encoder_outs[0]["encoder_padding_mask"]:
src_lens = (
encoder_outs[0]["encoder_out"][0]
.new(bsz)
.fill_(encoder_outs[0]["encoder_out"][0].size(1))
)
else:
src_lens = (~encoder_outs[0]["encoder_padding_mask"][0]).sum(1)
max_lens = (src_lens * max_ratio).clamp(min=10).long()
# delete words
# do not delete tokens if it is <s> </s>
can_del_word = output_tokens.ne(self.pad).sum(1) > 2
if can_del_word.sum() != 0: # we cannot delete, skip
output_tokens, output_scores, attn = self.forward_word_del(
encoder_outs,
output_tokens,
output_scores,
attn,
can_del_word,
)
# insert placeholders
can_ins_mask = output_tokens.ne(self.pad).sum(1) < max_lens
if can_ins_mask.sum() != 0:
output_tokens, output_scores = self.forward_mask_ins(
encoder_outs,
output_tokens,
output_scores,
can_ins_mask,
eos_penalty,
max_lens,
)
# insert words
can_ins_word = output_tokens.eq(self.unk).sum(1) > 0
if can_ins_word.sum() != 0:
output_tokens, output_scores, attn = self.forward_word_ins(
encoder_outs,
output_tokens,
output_scores,
attn,
can_ins_word,
)
# delete some unnecessary paddings
cut_off = output_tokens.ne(self.pad).sum(1).max()
output_tokens = output_tokens[:, :cut_off]
output_scores = output_scores[:, :cut_off]
attn = None if attn is None else attn[:, :cut_off, :]
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=attn,
history=None,
)
def forward_word_del(
self, encoder_outs, output_tokens, output_scores, attn, can_del_word
):
word_del_score_avg = []
word_del_attn_avg = []
for model, encoder_out in zip(self.models, encoder_outs):
word_del_out, word_del_attn = model.decoder.forward_word_del(
_skip(output_tokens, can_del_word),
_skip_encoder_out(model.encoder, encoder_out, can_del_word),
)
word_del_score = F.log_softmax(word_del_out, 2)
word_del_score_avg.append(word_del_score)
word_del_attn_avg.append(word_del_attn)
word_del_score_avg = torch.logsumexp(
torch.stack(word_del_score_avg, dim=0), dim=0
) - math.log(len(self.models))
word_del_pred = word_del_score_avg.max(-1)[1].bool()
if word_del_attn_avg[0] is not None:
word_del_attn_avg = torch.stack(word_del_attn_avg, dim=0) / len(self.models)
else:
word_del_attn_avg = None
_tokens, _scores, _attn = _apply_del_words(
output_tokens[can_del_word],
output_scores[can_del_word],
word_del_attn_avg,
word_del_pred,
self.pad,
self.bos,
self.eos,
)
output_tokens = _fill(output_tokens, can_del_word, _tokens, self.pad)
output_scores = _fill(output_scores, can_del_word, _scores, 0)
attn = _fill(attn, can_del_word, _attn, 0.0)
return output_tokens, output_scores, attn
def forward_mask_ins(
self,
encoder_outs,
output_tokens,
output_scores,
can_ins_mask,
eos_penalty,
max_lens,
):
mask_ins_score_avg = []
for model, encoder_out in zip(self.models, encoder_outs):
mask_ins_out, _ = model.decoder.forward_mask_ins(
_skip(output_tokens, can_ins_mask),
_skip_encoder_out(model.encoder, encoder_out, can_ins_mask),
)
mask_ins_score = F.log_softmax(mask_ins_out, 2)
if eos_penalty > 0.0:
mask_ins_score[:, :, 0] -= eos_penalty
mask_ins_score_avg.append(mask_ins_score)
mask_ins_score_avg = torch.logsumexp(
torch.stack(mask_ins_score_avg, dim=0), dim=0
) - math.log(len(self.models))
mask_ins_pred = mask_ins_score_avg.max(-1)[1]
mask_ins_pred = torch.min(
mask_ins_pred, max_lens[can_ins_mask, None].expand_as(mask_ins_pred)
)
_tokens, _scores = _apply_ins_masks(
output_tokens[can_ins_mask],
output_scores[can_ins_mask],
mask_ins_pred,
self.pad,
self.unk,
self.eos,
)
output_tokens = _fill(output_tokens, can_ins_mask, _tokens, self.pad)
output_scores = _fill(output_scores, can_ins_mask, _scores, 0)
return output_tokens, output_scores
def forward_word_ins(
self, encoder_outs, output_tokens, output_scores, attn, can_ins_word
):
word_ins_score_avg = []
word_ins_attn_avg = []
for model, encoder_out in zip(self.models, encoder_outs):
word_ins_out, word_ins_attn = model.decoder.forward_word_ins(
_skip(output_tokens, can_ins_word),
_skip_encoder_out(model.encoder, encoder_out, can_ins_word),
)
word_ins_score = F.log_softmax(word_ins_out, 2)
word_ins_score_avg.append(word_ins_score)
word_ins_attn_avg.append(word_ins_attn)
word_ins_score_avg = torch.logsumexp(
torch.stack(word_ins_score_avg, dim=0), dim=0
) - math.log(len(self.models))
if word_ins_attn_avg[0] is not None:
word_ins_attn_avg = torch.stack(word_ins_attn_avg, dim=0) / len(self.models)
else:
word_ins_attn_avg = None
word_ins_score_max, word_ins_pred = word_ins_score_avg.max(-1)
_tokens, _scores = _apply_ins_words(
output_tokens[can_ins_word],
output_scores[can_ins_word],
word_ins_pred,
word_ins_score_max,
self.unk,
)
output_tokens = _fill(output_tokens, can_ins_word, _tokens, self.pad)
output_scores = _fill(output_scores, can_ins_word, _scores, 0)
attn = _fill(attn, can_ins_word, word_ins_attn, 0.0)
return output_tokens, output_scores, attn
def initialize_output_tokens(self, encoder_outs, src_tokens):
# LevT doesn't do length prediction.
return self.models[0].initialize_output_tokens(encoder_outs[0], src_tokens)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/nonautoregressive_ensembles.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
import torch.nn.functional as F
from fairseq import utils
from fairseq.iterative_refinement_generator import DecoderOut
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import FairseqNATDecoder, FairseqNATModel, ensemble_decoder
from fairseq.models.transformer import Embedding
from fairseq.modules.transformer_sentence_encoder import init_bert_params
def _mean_pooling(enc_feats, src_masks):
# enc_feats: T x B x C
# src_masks: B x T or None
if src_masks is None:
enc_feats = enc_feats.mean(0)
else:
src_masks = (~src_masks).transpose(0, 1).type_as(enc_feats)
enc_feats = (
(enc_feats / src_masks.sum(0)[None, :, None]) * src_masks[:, :, None]
).sum(0)
return enc_feats
def _argmax(x, dim):
return (x == x.max(dim, keepdim=True)[0]).type_as(x)
def _uniform_assignment(src_lens, trg_lens):
max_trg_len = trg_lens.max()
steps = (src_lens.float() - 1) / (trg_lens.float() - 1) # step-size
# max_trg_len
index_t = utils.new_arange(trg_lens, max_trg_len).float()
index_t = steps[:, None] * index_t[None, :] # batch_size X max_trg_len
index_t = torch.round(index_t).long().detach()
return index_t
@register_model("nonautoregressive_transformer")
class NATransformerModel(FairseqNATModel):
@property
def allow_length_beam(self):
return True
@staticmethod
def add_args(parser):
FairseqNATModel.add_args(parser)
# length prediction
parser.add_argument(
"--src-embedding-copy",
action="store_true",
help="copy encoder word embeddings as the initial input of the decoder",
)
parser.add_argument(
"--pred-length-offset",
action="store_true",
help="predicting the length difference between the target and source sentences",
)
parser.add_argument(
"--sg-length-pred",
action="store_true",
help="stop the gradients back-propagated from the length predictor",
)
parser.add_argument(
"--length-loss-factor",
type=float,
help="weights on the length prediction loss",
)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
decoder = NATransformerDecoder(args, tgt_dict, embed_tokens)
if getattr(args, "apply_bert_init", False):
decoder.apply(init_bert_params)
return decoder
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# length prediction
length_out = self.decoder.forward_length(
normalize=False, encoder_out=encoder_out
)
length_tgt = self.decoder.forward_length_prediction(
length_out, encoder_out, tgt_tokens
)
# decoding
word_ins_out = self.decoder(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
)
return {
"word_ins": {
"out": word_ins_out,
"tgt": tgt_tokens,
"mask": tgt_tokens.ne(self.pad),
"ls": self.args.label_smoothing,
"nll_loss": True,
},
"length": {
"out": length_out,
"tgt": length_tgt,
"factor": self.decoder.length_loss_factor,
},
}
def forward_decoder(self, decoder_out, encoder_out, decoding_format=None, **kwargs):
step = decoder_out.step
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
history = decoder_out.history
# execute the decoder
output_masks = output_tokens.ne(self.pad)
_scores, _tokens = self.decoder(
normalize=True,
prev_output_tokens=output_tokens,
encoder_out=encoder_out,
step=step,
).max(-1)
output_tokens.masked_scatter_(output_masks, _tokens[output_masks])
output_scores.masked_scatter_(output_masks, _scores[output_masks])
if history is not None:
history.append(output_tokens.clone())
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=None,
history=history,
)
def initialize_output_tokens(self, encoder_out, src_tokens):
# length prediction
length_tgt = self.decoder.forward_length_prediction(
self.decoder.forward_length(normalize=True, encoder_out=encoder_out),
encoder_out=encoder_out,
)
max_length = length_tgt.clamp_(min=2).max()
idx_length = utils.new_arange(src_tokens, max_length)
initial_output_tokens = src_tokens.new_zeros(
src_tokens.size(0), max_length
).fill_(self.pad)
initial_output_tokens.masked_fill_(
idx_length[None, :] < length_tgt[:, None], self.unk
)
initial_output_tokens[:, 0] = self.bos
initial_output_tokens.scatter_(1, length_tgt[:, None] - 1, self.eos)
initial_output_scores = initial_output_tokens.new_zeros(
*initial_output_tokens.size()
).type_as(encoder_out["encoder_out"][0])
return DecoderOut(
output_tokens=initial_output_tokens,
output_scores=initial_output_scores,
attn=None,
step=0,
max_step=0,
history=None,
)
def regenerate_length_beam(self, decoder_out, beam_size):
output_tokens = decoder_out.output_tokens
length_tgt = output_tokens.ne(self.pad).sum(1)
length_tgt = (
length_tgt[:, None]
+ utils.new_arange(length_tgt, 1, beam_size)
- beam_size // 2
)
length_tgt = length_tgt.view(-1).clamp_(min=2)
max_length = length_tgt.max()
idx_length = utils.new_arange(length_tgt, max_length)
initial_output_tokens = output_tokens.new_zeros(
length_tgt.size(0), max_length
).fill_(self.pad)
initial_output_tokens.masked_fill_(
idx_length[None, :] < length_tgt[:, None], self.unk
)
initial_output_tokens[:, 0] = self.bos
initial_output_tokens.scatter_(1, length_tgt[:, None] - 1, self.eos)
initial_output_scores = initial_output_tokens.new_zeros(
*initial_output_tokens.size()
).type_as(decoder_out.output_scores)
return decoder_out._replace(
output_tokens=initial_output_tokens, output_scores=initial_output_scores
)
class NATransformerDecoder(FairseqNATDecoder):
def __init__(self, args, dictionary, embed_tokens, no_encoder_attn=False):
super().__init__(
args, dictionary, embed_tokens, no_encoder_attn=no_encoder_attn
)
self.dictionary = dictionary
self.bos = dictionary.bos()
self.unk = dictionary.unk()
self.eos = dictionary.eos()
self.encoder_embed_dim = args.encoder_embed_dim
self.sg_length_pred = getattr(args, "sg_length_pred", False)
self.pred_length_offset = getattr(args, "pred_length_offset", False)
self.length_loss_factor = getattr(args, "length_loss_factor", 0.1)
self.src_embedding_copy = getattr(args, "src_embedding_copy", False)
self.embed_length = Embedding(256, self.encoder_embed_dim, None)
@ensemble_decoder
def forward(self, normalize, encoder_out, prev_output_tokens, step=0, **unused):
features, _ = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
embedding_copy=(step == 0) & self.src_embedding_copy,
)
decoder_out = self.output_layer(features)
return F.log_softmax(decoder_out, -1) if normalize else decoder_out
@ensemble_decoder
def forward_length(self, normalize, encoder_out):
enc_feats = encoder_out["encoder_out"][0] # T x B x C
if len(encoder_out["encoder_padding_mask"]) > 0:
src_masks = encoder_out["encoder_padding_mask"][0] # B x T
else:
src_masks = None
enc_feats = _mean_pooling(enc_feats, src_masks)
if self.sg_length_pred:
enc_feats = enc_feats.detach()
length_out = F.linear(enc_feats, self.embed_length.weight)
return F.log_softmax(length_out, -1) if normalize else length_out
def extract_features(
self,
prev_output_tokens,
encoder_out=None,
early_exit=None,
embedding_copy=False,
**unused
):
"""
Similar to *forward* but only return features.
Inputs:
prev_output_tokens: Tensor(B, T)
encoder_out: a dictionary of hidden states and masks
Returns:
tuple:
- the decoder's features of shape `(batch, tgt_len, embed_dim)`
- a dictionary with any model-specific outputs
the LevenshteinTransformer decoder has full-attention to all generated tokens
"""
# embedding
if embedding_copy:
src_embd = encoder_out["encoder_embedding"][0]
if len(encoder_out["encoder_padding_mask"]) > 0:
src_mask = encoder_out["encoder_padding_mask"][0]
else:
src_mask = None
src_mask = (
~src_mask
if src_mask is not None
else prev_output_tokens.new_ones(*src_embd.size()[:2]).bool()
)
x, decoder_padding_mask = self.forward_embedding(
prev_output_tokens,
self.forward_copying_source(
src_embd, src_mask, prev_output_tokens.ne(self.padding_idx)
),
)
else:
x, decoder_padding_mask = self.forward_embedding(prev_output_tokens)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
attn = None
inner_states = [x]
# decoder layers
for i, layer in enumerate(self.layers):
# early exit from the decoder.
if (early_exit is not None) and (i >= early_exit):
break
x, attn, _ = layer(
x,
encoder_out["encoder_out"][0]
if (encoder_out is not None and len(encoder_out["encoder_out"]) > 0)
else None,
encoder_out["encoder_padding_mask"][0]
if (
encoder_out is not None
and len(encoder_out["encoder_padding_mask"]) > 0
)
else None,
self_attn_mask=None,
self_attn_padding_mask=decoder_padding_mask,
)
inner_states.append(x)
if self.layer_norm:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
if self.project_out_dim is not None:
x = self.project_out_dim(x)
return x, {"attn": attn, "inner_states": inner_states}
def forward_embedding(self, prev_output_tokens, states=None):
# embed positions
positions = (
self.embed_positions(prev_output_tokens)
if self.embed_positions is not None
else None
)
# embed tokens and positions
if states is None:
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
else:
x = states
if positions is not None:
x += positions
x = self.dropout_module(x)
decoder_padding_mask = prev_output_tokens.eq(self.padding_idx)
return x, decoder_padding_mask
def forward_copying_source(self, src_embeds, src_masks, tgt_masks):
length_sources = src_masks.sum(1)
length_targets = tgt_masks.sum(1)
mapped_inputs = _uniform_assignment(length_sources, length_targets).masked_fill(
~tgt_masks, 0
)
copied_embedding = torch.gather(
src_embeds,
1,
mapped_inputs.unsqueeze(-1).expand(
*mapped_inputs.size(), src_embeds.size(-1)
),
)
return copied_embedding
def forward_length_prediction(self, length_out, encoder_out, tgt_tokens=None):
enc_feats = encoder_out["encoder_out"][0] # T x B x C
if len(encoder_out["encoder_padding_mask"]) > 0:
src_masks = encoder_out["encoder_padding_mask"][0] # B x T
else:
src_masks = None
if self.pred_length_offset:
if src_masks is None:
src_lengs = enc_feats.new_ones(enc_feats.size(1)).fill_(
enc_feats.size(0)
)
else:
src_lengs = (~src_masks).transpose(0, 1).type_as(enc_feats).sum(0)
src_lengs = src_lengs.long()
if tgt_tokens is not None:
# obtain the length target
tgt_lengs = tgt_tokens.ne(self.padding_idx).sum(1).long()
if self.pred_length_offset:
length_tgt = tgt_lengs - src_lengs + 128
else:
length_tgt = tgt_lengs
length_tgt = length_tgt.clamp(min=0, max=255)
else:
# predict the length target (greedy for now)
# TODO: implementing length-beam
pred_lengs = length_out.max(-1)[1]
if self.pred_length_offset:
length_tgt = pred_lengs - 128 + src_lengs
else:
length_tgt = pred_lengs
return length_tgt
@register_model_architecture(
"nonautoregressive_transformer", "nonautoregressive_transformer"
)
def base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.apply_bert_init = getattr(args, "apply_bert_init", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
# --- special arguments ---
args.sg_length_pred = getattr(args, "sg_length_pred", False)
args.pred_length_offset = getattr(args, "pred_length_offset", False)
args.length_loss_factor = getattr(args, "length_loss_factor", 0.1)
args.src_embedding_copy = getattr(args, "src_embedding_copy", False)
@register_model_architecture(
"nonautoregressive_transformer", "nonautoregressive_transformer_wmt_en_de"
)
def nonautoregressive_transformer_wmt_en_de(args):
base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/nonautoregressive_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
This file implements:
Ghazvininejad, Marjan, et al.
"Constant-time machine translation with conditional masked language models."
arXiv preprint arXiv:1904.09324 (2019).
"""
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import NATransformerModel
from fairseq.utils import new_arange
def _skeptical_unmasking(output_scores, output_masks, p):
sorted_index = output_scores.sort(-1)[1]
boundary_len = (
(output_masks.sum(1, keepdim=True).type_as(output_scores) - 2) * p
).long()
skeptical_mask = new_arange(output_masks) < boundary_len
return skeptical_mask.scatter(1, sorted_index, skeptical_mask)
@register_model("cmlm_transformer")
class CMLMNATransformerModel(NATransformerModel):
@staticmethod
def add_args(parser):
NATransformerModel.add_args(parser)
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
assert not self.decoder.src_embedding_copy, "do not support embedding copy."
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# length prediction
length_out = self.decoder.forward_length(
normalize=False, encoder_out=encoder_out
)
length_tgt = self.decoder.forward_length_prediction(
length_out, encoder_out, tgt_tokens
)
# decoding
word_ins_out = self.decoder(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
)
word_ins_mask = prev_output_tokens.eq(self.unk)
return {
"word_ins": {
"out": word_ins_out,
"tgt": tgt_tokens,
"mask": word_ins_mask,
"ls": self.args.label_smoothing,
"nll_loss": True,
},
"length": {
"out": length_out,
"tgt": length_tgt,
"factor": self.decoder.length_loss_factor,
},
}
def forward_decoder(self, decoder_out, encoder_out, decoding_format=None, **kwargs):
step = decoder_out.step
max_step = decoder_out.max_step
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
history = decoder_out.history
# execute the decoder
output_masks = output_tokens.eq(self.unk)
_scores, _tokens = self.decoder(
normalize=True,
prev_output_tokens=output_tokens,
encoder_out=encoder_out,
).max(-1)
output_tokens.masked_scatter_(output_masks, _tokens[output_masks])
output_scores.masked_scatter_(output_masks, _scores[output_masks])
if history is not None:
history.append(output_tokens.clone())
# skeptical decoding (depend on the maximum decoding steps.)
if (step + 1) < max_step:
skeptical_mask = _skeptical_unmasking(
output_scores, output_tokens.ne(self.pad), 1 - (step + 1) / max_step
)
output_tokens.masked_fill_(skeptical_mask, self.unk)
output_scores.masked_fill_(skeptical_mask, 0.0)
if history is not None:
history.append(output_tokens.clone())
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=None,
history=history,
)
@register_model_architecture("cmlm_transformer", "cmlm_transformer")
def cmlm_base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", True)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.apply_bert_init = getattr(args, "apply_bert_init", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
# --- special arguments ---
args.sg_length_pred = getattr(args, "sg_length_pred", False)
args.pred_length_offset = getattr(args, "pred_length_offset", False)
args.length_loss_factor = getattr(args, "length_loss_factor", 0.1)
args.ngram_predictor = getattr(args, "ngram_predictor", 1)
args.src_embedding_copy = getattr(args, "src_embedding_copy", False)
@register_model_architecture("cmlm_transformer", "cmlm_transformer_wmt_en_de")
def cmlm_wmt_en_de(args):
cmlm_base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/cmlm_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import NATransformerModel, base_architecture
from fairseq.modules import DynamicCRF
@register_model("nacrf_transformer")
class NACRFTransformerModel(NATransformerModel):
def __init__(self, args, encoder, decoder):
super().__init__(args, encoder, decoder)
self.crf_layer = DynamicCRF(
num_embedding=len(self.tgt_dict),
low_rank=args.crf_lowrank_approx,
beam_size=args.crf_beam_approx,
)
@property
def allow_ensemble(self):
return False
@staticmethod
def add_args(parser):
NATransformerModel.add_args(parser)
parser.add_argument(
"--crf-lowrank-approx",
type=int,
help="the dimension of low-rank approximation of transition",
)
parser.add_argument(
"--crf-beam-approx",
type=int,
help="the beam size for apporixmating the normalizing factor",
)
parser.add_argument(
"--word-ins-loss-factor",
type=float,
help="weights on NAT loss used to co-training with CRF loss.",
)
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# length prediction
length_out = self.decoder.forward_length(
normalize=False, encoder_out=encoder_out
)
length_tgt = self.decoder.forward_length_prediction(
length_out, encoder_out, tgt_tokens
)
# decoding
word_ins_out = self.decoder(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
)
word_ins_tgt, word_ins_mask = tgt_tokens, tgt_tokens.ne(self.pad)
# compute the log-likelihood of CRF
crf_nll = -self.crf_layer(word_ins_out, word_ins_tgt, word_ins_mask)
crf_nll = (crf_nll / word_ins_mask.type_as(crf_nll).sum(-1)).mean()
return {
"word_ins": {
"out": word_ins_out,
"tgt": word_ins_tgt,
"mask": word_ins_mask,
"ls": self.args.label_smoothing,
"nll_loss": True,
"factor": self.args.word_ins_loss_factor,
},
"word_crf": {"loss": crf_nll},
"length": {
"out": length_out,
"tgt": length_tgt,
"factor": self.decoder.length_loss_factor,
},
}
def forward_decoder(self, decoder_out, encoder_out, decoding_format=None, **kwargs):
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
history = decoder_out.history
# execute the decoder and get emission scores
output_masks = output_tokens.ne(self.pad)
word_ins_out = self.decoder(
normalize=False, prev_output_tokens=output_tokens, encoder_out=encoder_out
)
# run viterbi decoding through CRF
_scores, _tokens = self.crf_layer.forward_decoder(word_ins_out, output_masks)
output_tokens.masked_scatter_(output_masks, _tokens[output_masks])
output_scores.masked_scatter_(output_masks, _scores[output_masks])
if history is not None:
history.append(output_tokens.clone())
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=None,
history=history,
)
@register_model_architecture("nacrf_transformer", "nacrf_transformer")
def nacrf_base_architecture(args):
args.crf_lowrank_approx = getattr(args, "crf_lowrank_approx", 32)
args.crf_beam_approx = getattr(args, "crf_beam_approx", 64)
args.word_ins_loss_factor = getattr(args, "word_ins_loss_factor", 0.5)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", True)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", True)
base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/nat_crf_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import numpy as np
import torch
import torch.nn.functional as F
from fairseq.models import register_model, register_model_architecture
from fairseq.models.nat import (
FairseqNATModel,
LevenshteinTransformerDecoder,
LevenshteinTransformerModel,
ensemble_decoder,
)
from fairseq.models.transformer import Linear
from fairseq.modules.transformer_sentence_encoder import init_bert_params
from fairseq.utils import new_arange
class NegativeDistanceScore(object):
def __init__(self):
# pre-compute some values
self.scores = {}
self.scores[0.5] = self.compute_score_full(50, 0.5)
self.scores[1.0] = self.compute_score_full(50, 1.0)
self.scores[2.0] = self.compute_score_full(50, 2.0)
def __call__(self, i, L, tau):
if (tau is None) or (tau > 1000):
return 1 / L
if tau in self.scores:
if L < self.scores[tau].shape[0]:
return self.scores[tau][L - 1, i]
return self.compute_score(L, tau)[i]
def compute_score(self, L, tau):
s = np.array([-abs(L / 2 - i) / tau for i in range(L)])
s = np.exp(s - s.max())
return s / s.sum()
def compute_score_full(self, L, tau):
s = -abs(np.arange(0, L - 1)[:, None] / 2 - np.arange(L)[None, :]) / tau
s = np.tril(s, 0) + np.triu(s - float("inf"), 1)
s = np.exp(s - s.max(1, keepdims=True))
return s / s.sum(1, keepdims=True)
neg_scorer = NegativeDistanceScore()
def _get_ins_targets(in_tokens, out_tokens, padding_idx, unk_idx, vocab_size, tau=None):
try:
from fairseq import libnat
except ImportError as e:
import sys
sys.stderr.write("ERROR: missing libnat. run `pip install --editable .`\n")
raise e
B = in_tokens.size(0)
T = in_tokens.size(1)
V = vocab_size
with torch.cuda.device_of(in_tokens):
in_tokens_list = [
[t for t in s if t != padding_idx] for i, s in enumerate(in_tokens.tolist())
]
out_tokens_list = [
[t for t in s if t != padding_idx]
for i, s in enumerate(out_tokens.tolist())
]
full_labels = libnat.suggested_ed2_path(
in_tokens_list, out_tokens_list, padding_idx
)
insert_labels = [a[:-1] for a in full_labels]
# numericalize1
insert_label_tensors = in_tokens.new_zeros(B * (T - 1) * V).float()
insert_index, insert_labels = zip(
*[
(w + (j + i * (T - 1)) * V, neg_scorer(k, len(label), tau))
for i, labels in enumerate(insert_labels)
for j, label in enumerate(labels[1:-1])
for k, w in enumerate(label)
]
) # HACK 1:-1
insert_index, insert_labels = [
torch.tensor(list(a), device=in_tokens.device)
for a in [insert_index, insert_labels]
]
insert_label_tensors.scatter_(0, insert_index.long(), insert_labels)
insert_label_tensors = insert_label_tensors.view(B, T - 1, V)
return insert_label_tensors
def _apply_ins_words(in_tokens, in_scores, word_ins_pred, word_ins_scores, padding_idx):
padding_masks = in_tokens[:, 1:].eq(padding_idx)
word_ins_scores.masked_fill_(padding_masks, 0.0)
word_ins_pred.masked_fill_(padding_masks, padding_idx)
in_coords = new_arange(in_tokens).type_as(in_scores)
# shift all padding predictions to infinite
out_coords = (in_coords[:, 1:] - 0.5).masked_fill(
word_ins_pred.eq(padding_idx), float("inf")
)
out_coords = torch.cat([in_coords, out_coords], 1).sort(-1)[1]
out_tokens = torch.cat([in_tokens, word_ins_pred], 1).gather(1, out_coords)
out_scores = torch.cat([in_scores, word_ins_scores], 1).gather(1, out_coords)
return out_tokens, out_scores
@register_model("insertion_transformer")
class InsertionTransformerModel(LevenshteinTransformerModel):
def __init__(self, args, encoder, decoder):
super().__init__(args, encoder, decoder)
@staticmethod
def add_args(parser):
FairseqNATModel.add_args(parser)
parser.add_argument("--label-tau", default=None, type=float)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
decoder = InsertionTransformerDecoder(args, tgt_dict, embed_tokens)
if getattr(args, "apply_bert_init", False):
decoder.apply(init_bert_params)
return decoder
def forward(
self, src_tokens, src_lengths, prev_output_tokens, tgt_tokens, **kwargs
):
assert tgt_tokens is not None, "forward function only supports training."
# encoding
encoder_out = self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
# generate training labels for insertion
word_ins_out = self.decoder.forward_word_ins(
normalize=False,
prev_output_tokens=prev_output_tokens,
encoder_out=encoder_out,
)
word_ins_tgt = _get_ins_targets(
prev_output_tokens,
tgt_tokens,
self.pad,
self.unk,
len(self.tgt_dict),
tau=self.decoder.label_tau,
).type_as(word_ins_out)
word_ins_masks = prev_output_tokens[:, 1:].ne(self.pad)
return {
"word_ins": {
"out": word_ins_out,
"tgt": word_ins_tgt,
"mask": word_ins_masks,
"ls": self.args.label_smoothing,
"nll_loss": True,
}
}
def forward_decoder(
self, decoder_out, encoder_out, eos_penalty=0.0, max_ratio=None, **kwargs
):
output_tokens = decoder_out.output_tokens
output_scores = decoder_out.output_scores
history = decoder_out.history
# TODO: decoding for InsertionTransformer
word_ins_score = self.decoder.forward_word_ins(
normalize=True, prev_output_tokens=output_tokens, encoder_out=encoder_out
)
if eos_penalty > 0.0:
word_ins_score[:, :, self.pad] -= eos_penalty
word_ins_score, word_ins_pred = word_ins_score.max(-1)
output_tokens, output_scores = _apply_ins_words(
output_tokens, output_scores, word_ins_pred, word_ins_score, self.pad
)
# delete some unnecessary paddings
cut_off = output_tokens.ne(self.pad).sum(1).max()
output_tokens = output_tokens[:, :cut_off]
output_scores = output_scores[:, :cut_off]
if history is not None:
history.append(output_tokens.clone())
return decoder_out._replace(
output_tokens=output_tokens,
output_scores=output_scores,
attn=None,
history=history,
)
class InsertionTransformerDecoder(LevenshteinTransformerDecoder):
def __init__(self, args, dictionary, embed_tokens, no_encoder_attn=False):
# use the TransformerDecoder's __init__
super(LevenshteinTransformerDecoder, self).__init__(
args, dictionary, embed_tokens, no_encoder_attn=no_encoder_attn
)
self.dictionary = dictionary
self.bos = dictionary.bos()
self.unk = dictionary.unk()
self.eos = dictionary.eos()
self.pool_out = Linear(self.output_embed_dim * 2, self.output_embed_dim)
self.label_tau = getattr(args, "label_tau", None)
@ensemble_decoder
def forward_word_ins(self, normalize, encoder_out, prev_output_tokens):
features = self.extract_features(prev_output_tokens, encoder_out=encoder_out)[0]
features = self.pool_out(
torch.cat([features[:, :-1, :], features[:, 1:, :]], 2)
)
decoder_out = self.output_layer(features)
return F.log_softmax(decoder_out, -1) if normalize else decoder_out
def forward_mask_ins(self, *args, **kwargs):
raise NotImplementedError
def forward_word_del(self, *args, **kwargs):
raise NotImplementedError
@register_model_architecture("insertion_transformer", "insertion_transformer")
def insertion_base_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 2048)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 8)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", False)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.apply_bert_init = getattr(args, "apply_bert_init", False)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
# special for insertion transformer
args.label_tau = getattr(args, "label_tau", None)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/nat/insertion_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .hub_interface import * # noqa
from .model import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/bart/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
BART: Denoising Sequence-to-Sequence Pre-training for
Natural Language Generation, Translation, and Comprehension
"""
from typing import Optional
import logging
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.models import register_model, register_model_architecture
from fairseq.models.transformer import TransformerModel
from fairseq.modules.transformer_sentence_encoder import init_bert_params
from .hub_interface import BARTHubInterface
logger = logging.getLogger(__name__)
@register_model("bart")
class BARTModel(TransformerModel):
__jit_unused_properties__ = ["supported_targets"]
@classmethod
def hub_models(cls):
return {
"bart.base": "http://dl.fbaipublicfiles.com/fairseq/models/bart.base.tar.gz",
"bart.large": "http://dl.fbaipublicfiles.com/fairseq/models/bart.large.tar.gz",
"bart.large.mnli": "http://dl.fbaipublicfiles.com/fairseq/models/bart.large.mnli.tar.gz",
"bart.large.cnn": "http://dl.fbaipublicfiles.com/fairseq/models/bart.large.cnn.tar.gz",
"bart.large.xsum": "http://dl.fbaipublicfiles.com/fairseq/models/bart.large.xsum.tar.gz",
}
def __init__(self, args, encoder, decoder):
super().__init__(args, encoder, decoder)
# We follow BERT's random weight initialization
self.apply(init_bert_params)
self.classification_heads = nn.ModuleDict()
if hasattr(self.encoder, "dictionary"):
self.eos: int = self.encoder.dictionary.eos()
@staticmethod
def add_args(parser):
super(BARTModel, BARTModel).add_args(parser)
parser.add_argument(
"--pooler-dropout",
type=float,
metavar="D",
help="dropout probability in the masked_lm pooler layers",
)
parser.add_argument(
"--pooler-activation-fn",
choices=utils.get_available_activation_fns(),
help="activation function to use for pooler layer",
)
parser.add_argument(
"--spectral-norm-classification-head",
action="store_true",
help="Apply spectral normalization on the classification head",
)
@property
def supported_targets(self):
return {"self"}
def forward(
self,
src_tokens,
src_lengths,
prev_output_tokens,
features_only: bool = False,
classification_head_name: Optional[str] = None,
token_embeddings: Optional[torch.Tensor] = None,
return_all_hiddens: bool = True,
alignment_layer: Optional[int] = None,
alignment_heads: Optional[int] = None,
):
if classification_head_name is not None:
features_only = True
encoder_out = self.encoder(
src_tokens,
src_lengths=src_lengths,
token_embeddings=token_embeddings,
return_all_hiddens=return_all_hiddens,
)
x, extra = self.decoder(
prev_output_tokens,
encoder_out=encoder_out,
features_only=features_only,
alignment_layer=alignment_layer,
alignment_heads=alignment_heads,
src_lengths=src_lengths,
return_all_hiddens=return_all_hiddens,
)
eos: int = self.eos
if classification_head_name is not None:
sentence_representation = x[src_tokens.eq(eos), :].view(
x.size(0), -1, x.size(-1)
)[:, -1, :]
for k, head in self.classification_heads.items():
# for torch script only supports iteration
if k == classification_head_name:
x = head(sentence_representation)
break
return x, extra
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
bpe="gpt2",
sample_break_mode="eos",
**kwargs,
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
bpe=bpe,
load_checkpoint_heads=True,
sample_break_mode=sample_break_mode,
**kwargs,
)
return BARTHubInterface(x["args"], x["task"], x["models"][0])
def register_classification_head(
self, name, num_classes=None, inner_dim=None, **kwargs
):
"""Register a classification head."""
logger.info("Registering classification head: {0}".format(name))
if name in self.classification_heads:
prev_num_classes = self.classification_heads[name].out_proj.out_features
prev_inner_dim = self.classification_heads[name].dense.out_features
if num_classes != prev_num_classes or inner_dim != prev_inner_dim:
logger.warning(
're-registering head "{}" with num_classes {} (prev: {}) '
"and inner_dim {} (prev: {})".format(
name, num_classes, prev_num_classes, inner_dim, prev_inner_dim
)
)
self.classification_heads[name] = BARTClassificationHead(
input_dim=self.args.encoder_embed_dim,
inner_dim=inner_dim or self.args.encoder_embed_dim,
num_classes=num_classes,
activation_fn=self.args.pooler_activation_fn,
pooler_dropout=self.args.pooler_dropout,
do_spectral_norm=getattr(
self.args, "spectral_norm_classification_head", False
),
)
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
prefix = name + "." if name != "" else ""
current_head_names = (
[]
if not hasattr(self, "classification_heads")
else self.classification_heads.keys()
)
# Handle new classification heads present in the state dict.
keys_to_delete = []
for k in state_dict.keys():
if not k.startswith(prefix + "classification_heads."):
continue
head_name = k[len(prefix + "classification_heads.") :].split(".")[0]
num_classes = state_dict[
prefix + "classification_heads." + head_name + ".out_proj.weight"
].size(0)
inner_dim = state_dict[
prefix + "classification_heads." + head_name + ".dense.weight"
].size(0)
if getattr(self.args, "load_checkpoint_heads", False):
if head_name not in current_head_names:
self.register_classification_head(head_name, num_classes, inner_dim)
else:
if head_name not in current_head_names:
logger.warning(
"deleting classification head ({}) from checkpoint "
"not present in current model: {}".format(head_name, k)
)
keys_to_delete.append(k)
elif (
num_classes
!= self.classification_heads[head_name].out_proj.out_features
or inner_dim
!= self.classification_heads[head_name].dense.out_features
):
logger.warning(
"deleting classification head ({}) from checkpoint "
"with different dimensions than current model: {}".format(
head_name, k
)
)
keys_to_delete.append(k)
for k in keys_to_delete:
del state_dict[k]
def truncate_emb(key):
if key in state_dict:
state_dict[key] = state_dict[key][:-1, :]
# When finetuning on translation task, remove last row of
# embedding matrix that corresponds to mask_idx token.
loaded_dict_size = state_dict["encoder.embed_tokens.weight"].size(0)
if (
loaded_dict_size == len(self.encoder.dictionary) + 1
and "<mask>" not in self.encoder.dictionary
):
truncate_emb("encoder.embed_tokens.weight")
truncate_emb("decoder.embed_tokens.weight")
truncate_emb("encoder.output_projection.weight")
truncate_emb("decoder.output_projection.weight")
# When continued pretraining on new set of languages for mbart,
# add extra lang embeddings at the end of embed_tokens.
# Note: newly added languages are assumed to have been added at the end.
if self.args.task == "multilingual_denoising" and loaded_dict_size < len(
self.encoder.dictionary
):
logger.info(
"Adding extra language embeddings not found in pretrained model for "
"continued pretraining of MBART on new set of languages."
)
loaded_mask_token_embedding = state_dict["encoder.embed_tokens.weight"][
-1, :
]
num_langids_to_add = len(self.encoder.dictionary) - loaded_dict_size
embed_dim = state_dict["encoder.embed_tokens.weight"].size(1)
new_lang_embed_to_add = torch.zeros(num_langids_to_add, embed_dim)
nn.init.normal_(new_lang_embed_to_add, mean=0, std=embed_dim ** -0.5)
new_lang_embed_to_add = new_lang_embed_to_add.to(
dtype=state_dict["encoder.embed_tokens.weight"].dtype,
)
state_dict["encoder.embed_tokens.weight"] = torch.cat(
[
state_dict["encoder.embed_tokens.weight"][
: loaded_dict_size - 1, :
],
new_lang_embed_to_add,
loaded_mask_token_embedding.unsqueeze(0),
]
)
state_dict["decoder.embed_tokens.weight"] = torch.cat(
[
state_dict["decoder.embed_tokens.weight"][
: loaded_dict_size - 1, :
],
new_lang_embed_to_add,
loaded_mask_token_embedding.unsqueeze(0),
]
)
# Copy any newly-added classification heads into the state dict
# with their current weights.
if hasattr(self, "classification_heads"):
cur_state = self.classification_heads.state_dict()
for k, v in cur_state.items():
if prefix + "classification_heads." + k not in state_dict:
logger.info("Overwriting " + prefix + "classification_heads." + k)
state_dict[prefix + "classification_heads." + k] = v
class BARTClassificationHead(nn.Module):
"""Head for sentence-level classification tasks."""
def __init__(
self,
input_dim,
inner_dim,
num_classes,
activation_fn,
pooler_dropout,
do_spectral_norm=False,
):
super().__init__()
self.dense = nn.Linear(input_dim, inner_dim)
self.activation_fn = utils.get_activation_fn(activation_fn)
self.dropout = nn.Dropout(p=pooler_dropout)
self.out_proj = nn.Linear(inner_dim, num_classes)
if do_spectral_norm:
self.out_proj = torch.nn.utils.spectral_norm(self.out_proj)
def forward(self, features, **kwargs):
x = features
x = self.dropout(x)
x = self.dense(x)
x = self.activation_fn(x)
x = self.dropout(x)
x = self.out_proj(x)
return x
@register_model_architecture("bart", "bart_large")
def bart_large_architecture(args):
args.encoder_embed_path = getattr(args, "encoder_embed_path", None)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 1024)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 4 * 1024)
args.encoder_layers = getattr(args, "encoder_layers", 12)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 16)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_learned_pos = getattr(args, "encoder_learned_pos", True)
args.decoder_embed_path = getattr(args, "decoder_embed_path", None)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", args.encoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", args.encoder_ffn_embed_dim
)
args.decoder_layers = getattr(args, "decoder_layers", 12)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 16)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", True)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.relu_dropout = getattr(args, "relu_dropout", 0.0)
args.dropout = getattr(args, "dropout", 0.1)
args.max_target_positions = getattr(args, "max_target_positions", 1024)
args.max_source_positions = getattr(args, "max_source_positions", 1024)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", True
)
args.share_all_embeddings = getattr(args, "share_all_embeddings", True)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
args.no_scale_embedding = getattr(args, "no_scale_embedding", True)
args.layernorm_embedding = getattr(args, "layernorm_embedding", True)
args.activation_fn = getattr(args, "activation_fn", "gelu")
args.pooler_activation_fn = getattr(args, "pooler_activation_fn", "tanh")
args.pooler_dropout = getattr(args, "pooler_dropout", 0.0)
@register_model_architecture("bart", "bart_base")
def bart_base_architecture(args):
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 768)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 4 * 768)
args.encoder_layers = getattr(args, "encoder_layers", 6)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 12)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 12)
bart_large_architecture(args)
@register_model_architecture("bart", "mbart_large")
def mbart_large_architecture(args):
args.no_scale_embedding = getattr(args, "no_scale_embedding", False)
bart_large_architecture(args)
@register_model_architecture("bart", "mbart_base")
def mbart_base_architecture(args):
args.no_scale_embedding = getattr(args, "no_scale_embedding", False)
bart_base_architecture(args)
@register_model_architecture("bart", "mbart_base_wmt20")
def mbart_base_wmt20_architecture(args):
args.layernorm_embedding = getattr(args, "layernorm_embedding", False)
mbart_base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/bart/model.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from typing import Dict, List
import numpy as np
import torch
import torch.nn.functional as F
from fairseq import utils
from fairseq.hub_utils import GeneratorHubInterface
logger = logging.getLogger(__name__)
class BARTHubInterface(GeneratorHubInterface):
"""A simple PyTorch Hub interface to BART.
Usage: https://github.com/pytorch/fairseq/tree/main/examples/bart
"""
def __init__(self, cfg, task, model):
super().__init__(cfg, task, [model])
self.model = self.models[0]
def encode(
self, sentence: str, *addl_sentences, no_separator=True
) -> torch.LongTensor:
"""
BPE-encode a sentence (or multiple sentences).
Every sequence begins with a beginning-of-sentence (`<s>`) symbol.
Every sentence ends with an end-of-sentence (`</s>`).
Example (single sentence): `<s> a b c </s>`
Example (sentence pair): `<s> d e f </s> 1 2 3 </s>`
The BPE encoding follows GPT-2. One subtle detail is that the GPT-2 BPE
requires leading spaces. For example::
>>> bart.encode('Hello world').tolist()
[0, 31414, 232, 2]
>>> bart.encode(' world').tolist()
[0, 232, 2]
>>> bart.encode('world').tolist()
[0, 8331, 2]
"""
tokens = self.bpe.encode(sentence)
if len(tokens.split(" ")) > min(self.max_positions) - 2:
tokens = " ".join(tokens.split(" ")[: min(self.max_positions) - 2])
bpe_sentence = "<s> " + tokens + " </s>"
for s in addl_sentences:
bpe_sentence += " </s>" if not no_separator else ""
bpe_sentence += " " + self.bpe.encode(s) + " </s>"
tokens = self.task.source_dictionary.encode_line(bpe_sentence, append_eos=False)
return tokens.long()
def decode(self, tokens: torch.LongTensor):
assert tokens.dim() == 1
tokens = tokens.cpu().numpy()
if tokens[0] == self.task.source_dictionary.bos():
tokens = tokens[1:] # remove <s>
eos_mask = tokens == self.task.source_dictionary.eos()
doc_mask = eos_mask[1:] & eos_mask[:-1]
sentences = np.split(tokens, doc_mask.nonzero()[0] + 1)
sentences = [
self.bpe.decode(self.task.source_dictionary.string(s)) for s in sentences
]
if len(sentences) == 1:
return sentences[0]
return sentences
def _build_sample(self, src_tokens: List[torch.LongTensor]):
# assert torch.is_tensor(src_tokens)
dataset = self.task.build_dataset_for_inference(
src_tokens,
[x.numel() for x in src_tokens],
)
sample = dataset.collater(dataset)
sample = utils.apply_to_sample(lambda tensor: tensor.to(self.device), sample)
return sample
def generate(
self,
tokenized_sentences: List[torch.LongTensor],
*args,
inference_step_args=None,
skip_invalid_size_inputs=False,
**kwargs
) -> List[List[Dict[str, torch.Tensor]]]:
inference_step_args = inference_step_args or {}
if "prefix_tokens" in inference_step_args:
raise NotImplementedError("prefix generation not implemented for BART")
res = []
for batch in self._build_batches(tokenized_sentences, skip_invalid_size_inputs):
src_tokens = batch["net_input"]["src_tokens"]
inference_step_args["prefix_tokens"] = src_tokens.new_full(
(src_tokens.size(0), 1), fill_value=self.task.source_dictionary.bos()
).to(device=self.device)
results = super().generate(
src_tokens,
*args,
inference_step_args=inference_step_args,
skip_invalid_size_inputs=skip_invalid_size_inputs,
**kwargs
)
for id, hypos in zip(batch["id"].tolist(), results):
res.append((id, hypos))
res = [hypos for _, hypos in sorted(res, key=lambda x: x[0])]
return res
def extract_features(
self, tokens: torch.LongTensor, return_all_hiddens: bool = False
) -> torch.Tensor:
if tokens.dim() == 1:
tokens = tokens.unsqueeze(0)
if tokens.size(-1) > min(self.model.max_positions()):
raise ValueError(
"tokens exceeds maximum length: {} > {}".format(
tokens.size(-1), self.model.max_positions()
)
)
tokens.to(device=self.device),
prev_output_tokens = tokens.clone()
prev_output_tokens[:, 0] = tokens.gather(
1,
(tokens.ne(self.task.source_dictionary.pad()).sum(dim=1) - 1).unsqueeze(-1),
).squeeze()
prev_output_tokens[:, 1:] = tokens[:, :-1]
features, extra = self.model(
src_tokens=tokens,
src_lengths=None,
prev_output_tokens=prev_output_tokens,
features_only=True,
return_all_hiddens=return_all_hiddens,
)
if return_all_hiddens:
# convert from T x B x C -> B x T x C
inner_states = extra["inner_states"]
return [inner_state.transpose(0, 1) for inner_state in inner_states]
else:
return features # just the last layer's features
def register_classification_head(
self, name: str, num_classes: int = None, embedding_size: int = None, **kwargs
):
self.model.register_classification_head(
name, num_classes=num_classes, embedding_size=embedding_size, **kwargs
)
def predict(self, head: str, tokens: torch.LongTensor, return_logits: bool = False):
if tokens.dim() == 1:
tokens = tokens.unsqueeze(0)
features = self.extract_features(tokens.to(device=self.device))
sentence_representation = features[
tokens.eq(self.task.source_dictionary.eos()), :
].view(features.size(0), -1, features.size(-1))[:, -1, :]
logits = self.model.classification_heads[head](sentence_representation)
if return_logits:
return logits
return F.log_softmax(logits, dim=-1)
def fill_mask(
self,
masked_inputs: List[str],
topk: int = 5,
match_source_len: bool = True,
**generate_kwargs
):
masked_token = "<mask>"
batch_tokens = []
for masked_input in masked_inputs:
assert (
masked_token in masked_input
), "please add one {} token for the input".format(masked_token)
text_spans = masked_input.split(masked_token)
text_spans_bpe = (
(" {0} ".format(masked_token))
.join([self.bpe.encode(text_span.rstrip()) for text_span in text_spans])
.strip()
)
tokens = self.task.source_dictionary.encode_line(
"<s> " + text_spans_bpe + " </s>",
append_eos=False,
add_if_not_exist=False,
).long()
batch_tokens.append(tokens)
# ensure beam size is at least as big as topk
generate_kwargs["beam"] = max(
topk,
generate_kwargs.get("beam", -1),
)
generate_kwargs["match_source_len"] = match_source_len
batch_hypos = self.generate(batch_tokens, **generate_kwargs)
return [
[(self.decode(hypo["tokens"]), hypo["score"]) for hypo in hypos[:topk]]
for hypos in batch_hypos
]
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/bart/hub_interface.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .wav2vec import * # noqa
from .wav2vec2 import * # noqa
from .wav2vec2_asr import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/wav2vec/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import contextlib
import copy
import math
import re
from argparse import Namespace
from dataclasses import dataclass, field
from typing import Any, Optional
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from omegaconf import II, MISSING, open_dict
from fairseq import checkpoint_utils, tasks, utils
from fairseq.dataclass import FairseqDataclass
from fairseq.dataclass.utils import convert_namespace_to_omegaconf
from fairseq.models import (
BaseFairseqModel,
FairseqEncoder,
FairseqEncoderDecoderModel,
FairseqIncrementalDecoder,
register_model,
)
from fairseq.models.wav2vec.wav2vec2 import MASKING_DISTRIBUTION_CHOICES
from fairseq.modules import LayerNorm, PositionalEmbedding, TransformerDecoderLayer
from fairseq.tasks import FairseqTask
@dataclass
class Wav2Vec2AsrConfig(FairseqDataclass):
w2v_path: str = field(
default=MISSING, metadata={"help": "path to wav2vec 2.0 model"}
)
no_pretrained_weights: bool = field(
default=False, metadata={"help": "if true, does not load pretrained weights"}
)
dropout_input: float = field(
default=0.0,
metadata={"help": "dropout to apply to the input (after feat extr)"},
)
final_dropout: float = field(
default=0.0,
metadata={"help": "dropout after transformer and before final projection"},
)
dropout: float = field(
default=0.0, metadata={"help": "dropout probability inside wav2vec 2.0 model"}
)
attention_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability for attention weights inside wav2vec 2.0 model"
},
)
activation_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability after activation in FFN inside wav2vec 2.0 model"
},
)
conv_feature_layers: Optional[str] = field(
default="[(512, 10, 5)] + [(512, 3, 2)] * 4 + [(512,2,2)] + [(512,2,2)]",
metadata={
"help": (
"string describing convolutional feature extraction "
"layers in form of a python list that contains "
"[(dim, kernel_size, stride), ...]"
),
},
)
encoder_embed_dim: Optional[int] = field(
default=768, metadata={"help": "encoder embedding dimension"}
)
# masking
apply_mask: bool = field(
default=False, metadata={"help": "apply masking during fine-tuning"}
)
mask_length: int = field(
default=10, metadata={"help": "repeat the mask indices multiple times"}
)
mask_prob: float = field(
default=0.5,
metadata={
"help": "probability of replacing a token with mask (normalized by length)"
},
)
mask_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static", metadata={"help": "how to choose masks"}
)
mask_other: float = field(
default=0,
metadata={
"help": "secondary mask argument (used for more complex distributions), "
"see help in compute_mask_indices"
},
)
no_mask_overlap: bool = field(
default=False, metadata={"help": "whether to allow masks to overlap"}
)
mask_min_space: Optional[int] = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
# channel masking
mask_channel_length: int = field(
default=10, metadata={"help": "length of the mask for features (channels)"}
)
mask_channel_prob: float = field(
default=0.0, metadata={"help": "probability of replacing a feature with 0"}
)
mask_channel_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static",
metadata={"help": "how to choose mask length for channel masking"},
)
mask_channel_other: float = field(
default=0,
metadata={
"help": "secondary mask argument (used for more complex distributions), "
"see help in compute_mask_indicesh"
},
)
no_mask_channel_overlap: bool = field(
default=False, metadata={"help": "whether to allow channel masks to overlap"}
)
freeze_finetune_updates: int = field(
default=0, metadata={"help": "dont finetune wav2vec for this many updates"}
)
feature_grad_mult: float = field(
default=0.0, metadata={"help": "reset feature grad mult in wav2vec 2.0 to this"}
)
layerdrop: float = field(
default=0.0, metadata={"help": "probability of dropping a layer in wav2vec 2.0"}
)
mask_channel_min_space: Optional[int] = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
mask_channel_before: bool = False
normalize: bool = II("task.normalize")
data: str = II("task.data")
# this holds the loaded wav2vec args
w2v_args: Any = None
checkpoint_activations: bool = field(
default=False, metadata={"help": "checkpoint_activations"}
)
offload_activations: bool = field(
default=False, metadata={"help": "offload_activations"}
)
min_params_to_wrap: int = field(
default=int(1e8),
metadata={
"help": "minimum number of params for a layer to be wrapped with FSDP() when "
"training with --ddp-backend=fully_sharded. Smaller values will "
"improve memory efficiency, but may make torch.distributed "
"communication less efficient due to smaller input sizes. This option "
"is set to 0 (i.e., always wrap) when --checkpoint-activations or "
"--offload-activations are passed."
},
)
checkpoint_activations: bool = field(
default=False,
metadata={"help": "recompute activations and save memory for extra compute"},
)
ddp_backend: str = II("distributed_training.ddp_backend")
@dataclass
class Wav2Vec2CtcConfig(Wav2Vec2AsrConfig):
blank_weight: float = 0
blank_mode: str = "add"
@register_model("wav2vec_ctc", dataclass=Wav2Vec2CtcConfig)
class Wav2VecCtc(BaseFairseqModel):
def __init__(self, cfg: Wav2Vec2CtcConfig, w2v_encoder: BaseFairseqModel):
super().__init__()
self.cfg = cfg
self.w2v_encoder = w2v_encoder
self.blank_weight = cfg.blank_weight
self.blank_mode = cfg.blank_mode
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
return state_dict
@classmethod
def build_model(cls, cfg: Wav2Vec2CtcConfig, task: FairseqTask):
"""Build a new model instance."""
w2v_encoder = Wav2VecEncoder(cfg, len(task.target_dictionary))
return cls(cfg, w2v_encoder)
def get_logits(self, net_output, normalize=False):
logits = net_output["encoder_out"]
if self.blank_weight != 0:
if self.blank_mode == "add":
logits[..., 0] += self.blank_weight
elif self.blank_mode == "set":
logits[..., 0] = self.blank_weight
else:
raise Exception(f"invalid blank mode {self.blank_mode}")
if net_output["padding_mask"] is not None and net_output["padding_mask"].any():
number_of_classes = logits.size(-1)
masking_tensor = torch.ones(
number_of_classes, device=logits.device
) * float("-inf")
masking_tensor[0] = 0
logits[net_output["padding_mask"].T] = masking_tensor.type_as(logits)
if normalize:
logits = utils.log_softmax(logits.float(), dim=-1)
return logits
def get_normalized_probs(self, net_output, log_probs):
"""Get normalized probabilities (or log probs) from a net's output."""
logits = self.get_logits(net_output)
if log_probs:
return utils.log_softmax(logits.float(), dim=-1)
else:
return utils.softmax(logits.float(), dim=-1)
def forward(self, **kwargs):
x = self.w2v_encoder(**kwargs)
return x
@dataclass
class Wav2Vec2Seq2SeqConfig(Wav2Vec2AsrConfig):
decoder_embed_dim: int = field(
default=768, metadata={"help": "decoder embedding dimension"}
)
decoder_ffn_embed_dim: int = field(
default=3072, metadata={"help": "decoder embedding dimension for FFN"}
)
decoder_layers: int = field(default=6, metadata={"help": "num of decoder layers"})
decoder_layerdrop: float = field(
default=0.0, metadata={"help": "decoder layerdrop chance"}
)
decoder_attention_heads: int = field(
default=4, metadata={"help": "num decoder attention heads"}
)
decoder_learned_pos: bool = field(
default=False,
metadata={"help": "use learned positional embeddings in the decoder"},
)
decoder_normalize_before: bool = field(
default=False, metadata={"help": "apply layernorm before each decoder block"}
)
no_token_positional_embeddings: bool = field(
default=False,
metadata={
"help": "if set, disables positional embeddings (outside self attention)"
},
)
decoder_dropout: float = field(
default=0.0, metadata={"help": "dropout probability in the decoder"}
)
decoder_attention_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability for attention weights inside the decoder"
},
)
decoder_activation_dropout: float = field(
default=0.0,
metadata={
"help": "dropout probability after activation in FFN inside the decoder"
},
)
max_target_positions: int = field(
default=2048, metadata={"help": "max target positions"}
)
share_decoder_input_output_embed: bool = field(
default=False, metadata={"help": "share decoder input and output embeddings"}
)
autoregressive: bool = II("task.autoregressive")
@register_model("wav2vec_seq2seq", dataclass=Wav2Vec2Seq2SeqConfig)
class Wav2Vec2Seq2SeqModel(FairseqEncoderDecoderModel):
def __init__(self, encoder, decoder):
super().__init__(encoder, decoder)
@classmethod
def build_model(cls, cfg: Wav2Vec2Seq2SeqConfig, task: FairseqTask):
"""Build a new model instance."""
assert (
cfg.autoregressive
), "Please set task.autoregressive=true for seq2seq asr models"
src_dict, tgt_dict = task.source_dictionary, task.target_dictionary
def build_embedding(dictionary, embed_dim):
num_embeddings = len(dictionary)
padding_idx = dictionary.pad()
emb = Embedding(num_embeddings, embed_dim, padding_idx)
return emb
decoder_embed_tokens = build_embedding(tgt_dict, cfg.decoder_embed_dim)
encoder = cls.build_encoder(cfg)
decoder = cls.build_decoder(cfg, tgt_dict, decoder_embed_tokens)
return Wav2Vec2Seq2SeqModel(encoder, decoder)
@classmethod
def build_encoder(cls, cfg: Wav2Vec2AsrConfig):
return Wav2VecEncoder(cfg)
@classmethod
def build_decoder(cls, cfg: Wav2Vec2Seq2SeqConfig, tgt_dict, embed_tokens):
return TransformerDecoder(cfg, tgt_dict, embed_tokens)
def forward(self, **kwargs):
encoder_out = self.encoder(**kwargs)
decoder_out = self.decoder(encoder_out=encoder_out, **kwargs)
return decoder_out
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
return state_dict
class Wav2VecEncoder(FairseqEncoder):
def __init__(self, cfg: Wav2Vec2AsrConfig, output_size=None):
self.apply_mask = cfg.apply_mask
arg_overrides = {
"dropout": cfg.dropout,
"activation_dropout": cfg.activation_dropout,
"dropout_input": cfg.dropout_input,
"attention_dropout": cfg.attention_dropout,
"mask_length": cfg.mask_length,
"mask_prob": cfg.mask_prob,
"mask_selection": cfg.mask_selection,
"mask_other": cfg.mask_other,
"no_mask_overlap": cfg.no_mask_overlap,
"mask_channel_length": cfg.mask_channel_length,
"mask_channel_prob": cfg.mask_channel_prob,
"mask_channel_before": cfg.mask_channel_before,
"mask_channel_selection": cfg.mask_channel_selection,
"mask_channel_other": cfg.mask_channel_other,
"no_mask_channel_overlap": cfg.no_mask_channel_overlap,
"encoder_layerdrop": cfg.layerdrop,
"feature_grad_mult": cfg.feature_grad_mult,
"checkpoint_activations": cfg.checkpoint_activations,
"offload_activations": cfg.offload_activations,
"min_params_to_wrap": cfg.min_params_to_wrap,
}
if cfg.w2v_args is None:
state = checkpoint_utils.load_checkpoint_to_cpu(cfg.w2v_path, arg_overrides)
w2v_args = state.get("cfg", None)
if w2v_args is None:
w2v_args = convert_namespace_to_omegaconf(state["args"])
w2v_args.criterion = None
w2v_args.lr_scheduler = None
cfg.w2v_args = w2v_args
else:
state = None
w2v_args = cfg.w2v_args
if isinstance(w2v_args, Namespace):
cfg.w2v_args = w2v_args = convert_namespace_to_omegaconf(w2v_args)
assert cfg.normalize == w2v_args.task.normalize, (
"Fine-tuning works best when data normalization is the same. "
"Please check that --normalize is set or unset for both pre-training and here"
)
if hasattr(cfg, "checkpoint_activations") and cfg.checkpoint_activations:
with open_dict(w2v_args):
w2v_args.model.checkpoint_activations = cfg.checkpoint_activations
w2v_args.task.data = cfg.data
task = tasks.setup_task(w2v_args.task)
model = task.build_model(w2v_args.model, from_checkpoint=True)
if state is not None and not cfg.no_pretrained_weights:
self.load_model_weights(state, model, cfg)
model.remove_pretraining_modules()
super().__init__(task.source_dictionary)
d = w2v_args.model.encoder_embed_dim
self.w2v_model = model
self.final_dropout = nn.Dropout(cfg.final_dropout)
self.freeze_finetune_updates = cfg.freeze_finetune_updates
self.num_updates = 0
targ_d = None
self.proj = None
if output_size is not None:
targ_d = output_size
elif getattr(cfg, "decoder_embed_dim", d) != d:
targ_d = cfg.decoder_embed_dim
if targ_d is not None:
self.proj = Linear(d, targ_d)
def load_model_weights(self, state, model, cfg):
if cfg.ddp_backend == "fully_sharded":
from fairseq.distributed import FullyShardedDataParallel
for name, module in model.named_modules():
if "encoder.layers" in name and len(name.split(".")) == 3:
# Only for layers, we do a special handling and load the weights one by one
# We dont load all weights together as that wont be memory efficient and may
# cause oom
new_dict = {
k.replace(name + ".", ""): v
for (k, v) in state["model"].items()
if name + "." in k
}
assert isinstance(module, FullyShardedDataParallel)
with module.summon_full_params():
module.load_state_dict(new_dict, strict=True)
module._reset_lazy_init()
# Once layers are loaded, filter them out and load everything else.
r = re.compile("encoder.layers.\d.")
filtered_list = list(filter(r.match, state["model"].keys()))
new_big_dict = {
k: v for (k, v) in state["model"].items() if k not in filtered_list
}
model.load_state_dict(new_big_dict, strict=False)
else:
model.load_state_dict(state["model"], strict=True)
def set_num_updates(self, num_updates):
"""Set the number of parameters updates."""
super().set_num_updates(num_updates)
self.num_updates = num_updates
def forward(self, source, padding_mask, **kwargs):
w2v_args = {
"source": source,
"padding_mask": padding_mask,
"mask": self.apply_mask and self.training,
}
ft = self.freeze_finetune_updates <= self.num_updates
with torch.no_grad() if not ft else contextlib.ExitStack():
res = self.w2v_model.extract_features(**w2v_args)
x = res["x"]
padding_mask = res["padding_mask"]
# B x T x C -> T x B x C
x = x.transpose(0, 1)
x = self.final_dropout(x)
if self.proj:
x = self.proj(x)
return {
"encoder_out": x, # T x B x C
"padding_mask": padding_mask, # B x T,
"layer_results": res["layer_results"],
}
def forward_torchscript(self, net_input):
if torch.jit.is_scripting():
return self.forward(net_input["source"], net_input["padding_mask"])
else:
return self.forward_non_torchscript(net_input)
def reorder_encoder_out(self, encoder_out, new_order):
if encoder_out["encoder_out"] is not None:
encoder_out["encoder_out"] = encoder_out["encoder_out"].index_select(
1, new_order
)
if encoder_out["padding_mask"] is not None:
encoder_out["padding_mask"] = encoder_out["padding_mask"].index_select(
0, new_order
)
return encoder_out
def max_positions(self):
"""Maximum input length supported by the encoder."""
return None
def upgrade_state_dict_named(self, state_dict, name):
return state_dict
class TransformerDecoder(FairseqIncrementalDecoder):
"""
Transformer decoder consisting of *args.decoder_layers* layers. Each layer
is a :class:`TransformerDecoderLayer`.
Args:
args (argparse.Namespace): parsed command-line arguments
dictionary (~fairseq.data.Dictionary): decoding dictionary
embed_tokens (torch.nn.Embedding): output embedding
no_encoder_attn (bool, optional): whether to attend to encoder outputs
(default: False).
"""
def __init__(
self,
cfg: Wav2Vec2Seq2SeqConfig,
dictionary,
embed_tokens,
no_encoder_attn=False,
):
super().__init__(dictionary)
self.dropout = cfg.decoder_dropout
self.share_input_output_embed = cfg.share_decoder_input_output_embed
input_embed_dim = embed_tokens.embedding_dim
embed_dim = cfg.decoder_embed_dim
self.output_embed_dim = cfg.decoder_embed_dim
self.layerdrop = cfg.decoder_layerdrop
self.padding_idx = embed_tokens.padding_idx
self.max_target_positions = cfg.max_target_positions
self.embed_tokens = embed_tokens
self.embed_scale = math.sqrt(embed_dim) # todo: try with input_embed_dim
self.project_in_dim = (
Linear(input_embed_dim, embed_dim, bias=False)
if embed_dim != input_embed_dim
else None
)
self.embed_positions = (
PositionalEmbedding(
cfg.max_target_positions,
embed_dim,
self.padding_idx,
learned=cfg.decoder_learned_pos,
)
if not cfg.no_token_positional_embeddings
else None
)
# TODO: update this when transformer gets converted to dataclass configs
transformer_cfg = copy.deepcopy(cfg)
with open_dict(transformer_cfg):
transformer_cfg.dropout = transformer_cfg.decoder_dropout
transformer_cfg.attention_dropout = (
transformer_cfg.decoder_attention_dropout
)
transformer_cfg.activation_dropout = (
transformer_cfg.decoder_activation_dropout
)
self.layers = nn.ModuleList([])
self.layers.extend(
[
TransformerDecoderLayer(transformer_cfg, no_encoder_attn)
for _ in range(transformer_cfg.decoder_layers)
]
)
if not self.share_input_output_embed:
self.embed_out = nn.Parameter(
torch.Tensor(len(dictionary), self.output_embed_dim)
)
nn.init.normal_(self.embed_out, mean=0, std=self.output_embed_dim ** -0.5)
if transformer_cfg.decoder_normalize_before:
self.layer_norm = LayerNorm(embed_dim)
else:
self.layer_norm = None
def forward(
self, prev_output_tokens, encoder_out=None, incremental_state=None, **unused
):
"""
Args:
prev_output_tokens (LongTensor): previous decoder outputs of shape
`(batch, tgt_len)`, for teacher forcing
encoder_out (Tensor, optional): output from the encoder, used for
encoder-side attention
incremental_state (dict): dictionary used for storing state during
:ref:`Incremental decoding`
Returns:
tuple:
- the decoder's output of shape `(batch, tgt_len, vocab)`
- a dictionary with any model-specific outputs
"""
prev_output_tokens = prev_output_tokens.long()
x, extra = self.extract_features(
prev_output_tokens, encoder_out, incremental_state
)
x = self.output_layer(x)
return x, extra
def extract_features(
self, prev_output_tokens, encoder_out=None, incremental_state=None, **unused
):
"""
Similar to *forward* but only return features.
Returns:
tuple:
- the decoder's features of shape `(batch, tgt_len, embed_dim)`
- a dictionary with any model-specific outputs
"""
# embed positions
positions = (
self.embed_positions(
prev_output_tokens, incremental_state=incremental_state
)
if self.embed_positions is not None
else None
)
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
if positions is not None:
positions = positions[:, -1:]
# embed tokens and positions
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
if positions is not None:
x += positions
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
attn = None
inner_states = [x]
# decoder layers
self_attn_padding_mask = None
if prev_output_tokens.eq(self.padding_idx).any():
self_attn_padding_mask = prev_output_tokens.eq(self.padding_idx)
for layer in self.layers:
dropout_probability = np.random.random()
if not self.training or (dropout_probability > self.layerdrop):
x, attn, _ = layer(
x,
encoder_out["encoder_out"] if encoder_out is not None else None,
encoder_out["padding_mask"] if encoder_out is not None else None,
incremental_state,
self_attn_mask=self.buffered_future_mask(x)
if incremental_state is None
else None,
self_attn_padding_mask=self_attn_padding_mask,
)
inner_states.append(x)
if self.layer_norm:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
return x, {"attn": attn, "inner_states": inner_states}
def output_layer(self, features, **kwargs):
"""Project features to the vocabulary size."""
# project back to size of vocabulary
if self.share_input_output_embed:
return F.linear(features, self.embed_tokens.weight)
else:
return F.linear(features, self.embed_out)
def max_positions(self):
"""Maximum output length supported by the decoder."""
if self.embed_positions is None:
return self.max_target_positions
return min(self.max_target_positions, self.embed_positions.max_positions)
def buffered_future_mask(self, tensor):
dim = tensor.size(0)
if (
not hasattr(self, "_future_mask")
or self._future_mask is None
or self._future_mask.device != tensor.device
or self._future_mask.size(0) < dim
):
self._future_mask = torch.triu(
utils.fill_with_neg_inf(tensor.new(dim, dim)), 1
)
return self._future_mask[:dim, :dim]
def upgrade_state_dict_named(self, state_dict, name):
return state_dict
def Embedding(num_embeddings, embedding_dim, padding_idx):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
return m
def Linear(in_features, out_features, bias=True):
m = nn.Linear(in_features, out_features, bias)
nn.init.xavier_uniform_(m.weight)
if bias:
nn.init.constant_(m.bias, 0.0)
return m
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/wav2vec/wav2vec2_asr.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from dataclasses import dataclass, field
from typing import List, Tuple
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from fairseq.data.data_utils import compute_mask_indices
from fairseq.dataclass import ChoiceEnum, FairseqDataclass
from fairseq.models import BaseFairseqModel, register_model
from fairseq.modules import (
Fp32GroupNorm,
Fp32LayerNorm,
GradMultiply,
GumbelVectorQuantizer,
LayerNorm,
MultiheadAttention,
SamePad,
TransposeLast,
)
from fairseq.modules.checkpoint_activations import checkpoint_wrapper
from fairseq.modules.transformer_sentence_encoder import init_bert_params
from fairseq.utils import buffered_arange, index_put, is_xla_tensor
from fairseq.distributed import fsdp_wrap
from fairseq.modules.conformer_layer import ConformerWav2Vec2EncoderLayer
from fairseq.modules import RelPositionalEncoding
from .utils import pad_to_multiple
EXTRACTOR_MODE_CHOICES = ChoiceEnum(["default", "layer_norm"])
MASKING_DISTRIBUTION_CHOICES = ChoiceEnum(["static", "uniform", "normal", "poisson"])
LAYER_TYPE_CHOICES = ChoiceEnum(["transformer", "conformer"])
@dataclass
class Wav2Vec2Config(FairseqDataclass):
extractor_mode: EXTRACTOR_MODE_CHOICES = field(
default="default",
metadata={
"help": "mode for feature extractor. default has a single group norm with d "
"groups in the first conv block, whereas layer_norm has layer norms in "
"every block (meant to use with normalize=True)"
},
)
encoder_layers: int = field(
default=12, metadata={"help": "num encoder layers in the transformer"}
)
encoder_embed_dim: int = field(
default=768, metadata={"help": "encoder embedding dimension"}
)
encoder_ffn_embed_dim: int = field(
default=3072, metadata={"help": "encoder embedding dimension for FFN"}
)
encoder_attention_heads: int = field(
default=12, metadata={"help": "num encoder attention heads"}
)
activation_fn: ChoiceEnum(utils.get_available_activation_fns()) = field(
default="gelu", metadata={"help": "activation function to use"}
)
layer_type: LAYER_TYPE_CHOICES = field(
default="transformer", metadata={"help": "layer type in encoder"}
)
# dropouts
dropout: float = field(
default=0.1, metadata={"help": "dropout probability for the transformer"}
)
attention_dropout: float = field(
default=0.1, metadata={"help": "dropout probability for attention weights"}
)
activation_dropout: float = field(
default=0.0, metadata={"help": "dropout probability after activation in FFN"}
)
encoder_layerdrop: float = field(
default=0.0, metadata={"help": "probability of dropping a tarnsformer layer"}
)
dropout_input: float = field(
default=0.0,
metadata={"help": "dropout to apply to the input (after feat extr)"},
)
dropout_features: float = field(
default=0.0,
metadata={"help": "dropout to apply to the features (after feat extr)"},
)
final_dim: int = field(
default=0,
metadata={
"help": "project final representations and targets to this many dimensions."
"set to encoder_embed_dim is <= 0"
},
)
layer_norm_first: bool = field(
default=False, metadata={"help": "apply layernorm first in the transformer"}
)
conv_feature_layers: str = field(
default="[(512, 10, 5)] + [(512, 3, 2)] * 4 + [(512,2,2)] + [(512,2,2)]",
metadata={
"help": "string describing convolutional feature extraction layers in form of a python list that contains "
"[(dim, kernel_size, stride), ...]"
},
)
conv_bias: bool = field(
default=False, metadata={"help": "include bias in conv encoder"}
)
logit_temp: float = field(
default=0.1, metadata={"help": "temperature to divide logits by"}
)
quantize_targets: bool = field(
default=False, metadata={"help": "use quantized targets"}
)
quantize_input: bool = field(
default=False, metadata={"help": "use quantized inputs"}
)
same_quantizer: bool = field(
default=False, metadata={"help": "use same quantizer for inputs and targets"}
)
target_glu: bool = field(
default=False, metadata={"help": "adds projection + glu to targets"}
)
feature_grad_mult: float = field(
default=1.0, metadata={"help": "multiply feature extractor var grads by this"}
)
quantizer_depth: int = field(
default=1,
metadata={"help": "number of quantizer layers"},
)
quantizer_factor: int = field(
default=3,
metadata={
"help": "dimensionality increase for inner quantizer layers (if depth > 1)"
},
)
latent_vars: int = field(
default=320,
metadata={"help": "number of latent variables V in each group of the codebook"},
)
latent_groups: int = field(
default=2,
metadata={"help": "number of groups G of latent variables in the codebook"},
)
latent_dim: int = field(
default=0,
metadata={
"help": "if > 0, uses this dimensionality for latent variables. "
"otherwise uses final_dim / latent_groups"
},
)
# masking
mask_length: int = field(default=10, metadata={"help": "mask length"})
mask_prob: float = field(
default=0.65, metadata={"help": "probability of replacing a token with mask"}
)
mask_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static", metadata={"help": "how to choose mask length"}
)
mask_other: float = field(
default=0,
metadata={
"help": "secondary mask argument (used for more complex distributions), "
"see help in compute_mask_indices"
},
)
no_mask_overlap: bool = field(
default=False, metadata={"help": "whether to allow masks to overlap"}
)
mask_min_space: int = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
# channel masking
mask_channel_length: int = field(
default=10, metadata={"help": "length of the mask for features (channels)"}
)
mask_channel_prob: float = field(
default=0.0, metadata={"help": "probability of replacing a feature with 0"}
)
mask_channel_before: bool = False
mask_channel_selection: MASKING_DISTRIBUTION_CHOICES = field(
default="static",
metadata={"help": "how to choose mask length for channel masking"},
)
mask_channel_other: float = field(
default=0,
metadata={
"help": "secondary mask argument (used for more complex distributions), "
"see help in compute_mask_indicesh"
},
)
no_mask_channel_overlap: bool = field(
default=False, metadata={"help": "whether to allow channel masks to overlap"}
)
mask_channel_min_space: int = field(
default=1,
metadata={"help": "min space between spans (if no overlap is enabled)"},
)
# negative selection
num_negatives: int = field(
default=100,
metadata={"help": "number of negative examples from the same sample"},
)
negatives_from_everywhere: bool = field(
default=False,
metadata={"help": "sample negatives from everywhere, not just masked states"},
)
cross_sample_negatives: int = field(
default=0, metadata={"help": "number of negative examples from the any sample"}
)
codebook_negatives: int = field(
default=0, metadata={"help": "number of negative examples codebook"}
)
# positional embeddings
conv_pos: int = field(
default=128,
metadata={"help": "number of filters for convolutional positional embeddings"},
)
conv_pos_groups: int = field(
default=16,
metadata={"help": "number of groups for convolutional positional embedding"},
)
latent_temp: Tuple[float, float, float] = field(
default=(2, 0.5, 0.999995),
metadata={
"help": "temperature for latent variable sampling. "
"can be tuple of 3 values (start, end, decay)"
},
)
max_positions: int = field(default=100000, metadata={"help": "Max positions"})
checkpoint_activations: bool = field(
default=False,
metadata={"help": "recompute activations and save memory for extra compute"},
)
# FP16 optimization
required_seq_len_multiple: int = field(
default=1,
metadata={
"help": "pad the input to encoder such that the sequence length is divisible by multiple"
},
)
crop_seq_to_multiple: int = field(
default=1,
metadata={
"help": "crop convolutional feature extractor output such that the sequence length is divisible by multiple"
},
)
# Conformer
depthwise_conv_kernel_size: int = field(
default=31,
metadata={
"help": "depthwise-conv-kernel-size for convolution in conformer layer"
},
)
attn_type: str = field(
default="",
metadata={"help": "if espnet use ESPNET MHA"},
)
pos_enc_type: str = field(
default="abs",
metadata={"help": "Positional encoding type to use in conformer"},
)
fp16: bool = field(default=False, metadata={"help": "If fp16 is being used"})
@register_model("wav2vec2", dataclass=Wav2Vec2Config)
class Wav2Vec2Model(BaseFairseqModel):
def __init__(self, cfg: Wav2Vec2Config):
super().__init__()
self.cfg = cfg
feature_enc_layers = eval(cfg.conv_feature_layers)
self.embed = feature_enc_layers[-1][0]
self.feature_extractor = ConvFeatureExtractionModel(
conv_layers=feature_enc_layers,
dropout=0.0,
mode=cfg.extractor_mode,
conv_bias=cfg.conv_bias,
)
self.post_extract_proj = (
nn.Linear(self.embed, cfg.encoder_embed_dim)
if self.embed != cfg.encoder_embed_dim and not cfg.quantize_input
else None
)
self.crop_seq_to_multiple = cfg.crop_seq_to_multiple
self.mask_prob = cfg.mask_prob
self.mask_selection = cfg.mask_selection
self.mask_other = cfg.mask_other
self.mask_length = cfg.mask_length
self.no_mask_overlap = cfg.no_mask_overlap
self.mask_min_space = cfg.mask_min_space
self.mask_channel_prob = cfg.mask_channel_prob
self.mask_channel_before = cfg.mask_channel_before
self.mask_channel_selection = cfg.mask_channel_selection
self.mask_channel_other = cfg.mask_channel_other
self.mask_channel_length = cfg.mask_channel_length
self.no_mask_channel_overlap = cfg.no_mask_channel_overlap
self.mask_channel_min_space = cfg.mask_channel_min_space
self.dropout_input = nn.Dropout(cfg.dropout_input)
self.dropout_features = nn.Dropout(cfg.dropout_features)
self.feature_grad_mult = cfg.feature_grad_mult
self.quantizer = None
self.input_quantizer = None
self.n_negatives = cfg.num_negatives
self.cross_sample_negatives = cfg.cross_sample_negatives
self.codebook_negatives = cfg.codebook_negatives
self.negatives_from_everywhere = cfg.negatives_from_everywhere
self.logit_temp = cfg.logit_temp
final_dim = cfg.final_dim if cfg.final_dim > 0 else cfg.encoder_embed_dim
if cfg.quantize_targets:
vq_dim = cfg.latent_dim if cfg.latent_dim > 0 else final_dim
self.quantizer = GumbelVectorQuantizer(
dim=self.embed,
num_vars=cfg.latent_vars,
temp=cfg.latent_temp,
groups=cfg.latent_groups,
combine_groups=False,
vq_dim=vq_dim,
time_first=True,
weight_proj_depth=cfg.quantizer_depth,
weight_proj_factor=cfg.quantizer_factor,
)
self.project_q = nn.Linear(vq_dim, final_dim)
else:
self.project_q = nn.Linear(self.embed, final_dim)
if cfg.quantize_input:
if cfg.same_quantizer and self.quantizer is not None:
vq_dim = final_dim
self.input_quantizer = self.quantizer
else:
vq_dim = cfg.latent_dim if cfg.latent_dim > 0 else cfg.encoder_embed_dim
self.input_quantizer = GumbelVectorQuantizer(
dim=self.embed,
num_vars=cfg.latent_vars,
temp=cfg.latent_temp,
groups=cfg.latent_groups,
combine_groups=False,
vq_dim=vq_dim,
time_first=True,
weight_proj_depth=cfg.quantizer_depth,
weight_proj_factor=cfg.quantizer_factor,
)
self.project_inp = nn.Linear(vq_dim, cfg.encoder_embed_dim)
self.mask_emb = nn.Parameter(
torch.FloatTensor(cfg.encoder_embed_dim).uniform_()
)
encoder_cls = TransformerEncoder
if cfg.layer_type == "conformer" and cfg.pos_enc_type in ["rel_pos", "rope"]:
encoder_cls = ConformerEncoder
self.encoder = encoder_cls(cfg)
self.layer_norm = LayerNorm(self.embed)
self.target_glu = None
if cfg.target_glu:
self.target_glu = nn.Sequential(
nn.Linear(final_dim, final_dim * 2), nn.GLU()
)
self.final_proj = nn.Linear(cfg.encoder_embed_dim, final_dim)
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
return state_dict
@classmethod
def build_model(cls, cfg: Wav2Vec2Config, task=None):
"""Build a new model instance."""
return cls(cfg)
def apply_mask(
self,
x,
padding_mask,
mask_indices=None,
mask_channel_indices=None,
):
B, T, C = x.shape
if self.mask_channel_prob > 0 and self.mask_channel_before:
mask_channel_indices = compute_mask_indices(
(B, C),
None,
self.mask_channel_prob,
self.mask_channel_length,
self.mask_channel_selection,
self.mask_channel_other,
no_overlap=self.no_mask_channel_overlap,
min_space=self.mask_channel_min_space,
)
mask_channel_indices = (
torch.from_numpy(mask_channel_indices)
.to(x.device)
.unsqueeze(1)
.expand(-1, T, -1)
)
x[mask_channel_indices] = 0
if self.mask_prob > 0:
if mask_indices is None:
mask_indices = compute_mask_indices(
(B, T),
padding_mask,
self.mask_prob,
self.mask_length,
self.mask_selection,
self.mask_other,
min_masks=2,
no_overlap=self.no_mask_overlap,
min_space=self.mask_min_space,
)
mask_indices = torch.from_numpy(mask_indices).to(x.device)
x = index_put(x, mask_indices, self.mask_emb)
else:
mask_indices = None
if self.mask_channel_prob > 0 and not self.mask_channel_before:
if mask_channel_indices is None:
mask_channel_indices = compute_mask_indices(
(B, C),
None,
self.mask_channel_prob,
self.mask_channel_length,
self.mask_channel_selection,
self.mask_channel_other,
no_overlap=self.no_mask_channel_overlap,
min_space=self.mask_channel_min_space,
)
mask_channel_indices = (
torch.from_numpy(mask_channel_indices)
.to(x.device)
.unsqueeze(1)
.expand(-1, T, -1)
)
x = index_put(x, mask_channel_indices, 0)
return x, mask_indices
def sample_negatives(self, y, num, padding_count=None):
if self.n_negatives == 0 and self.cross_sample_negatives == 0:
return y.new(0)
bsz, tsz, fsz = y.shape
y = y.view(-1, fsz) # BTC => (BxT)C
# FIXME: what happens if padding_count is specified?
cross_high = tsz * bsz
high = tsz - (padding_count or 0)
with torch.no_grad():
assert high > 1, f"{bsz,tsz,fsz}"
if self.n_negatives > 0:
tszs = (
buffered_arange(num)
.unsqueeze(-1)
.expand(-1, self.n_negatives)
.flatten()
)
neg_idxs = torch.randint(
low=0, high=high - 1, size=(bsz, self.n_negatives * num)
)
neg_idxs[neg_idxs >= tszs] += 1
if self.cross_sample_negatives > 0:
tszs = (
buffered_arange(num)
.unsqueeze(-1)
.expand(-1, self.cross_sample_negatives)
.flatten()
)
cross_neg_idxs = torch.randint(
low=0,
high=cross_high - 1,
size=(bsz, self.cross_sample_negatives * num),
)
cross_neg_idxs[cross_neg_idxs >= tszs] += 1
if self.n_negatives > 0:
neg_idxs = neg_idxs + (torch.arange(bsz).unsqueeze(1) * high)
else:
neg_idxs = cross_neg_idxs
if self.cross_sample_negatives > 0 and self.n_negatives > 0:
neg_idxs = torch.cat([neg_idxs, cross_neg_idxs], dim=1)
negs = y[neg_idxs.view(-1)]
negs = negs.view(
bsz, num, self.n_negatives + self.cross_sample_negatives, fsz
).permute(
2, 0, 1, 3
) # to NxBxTxC
return negs, neg_idxs
def compute_preds(self, x, y, negatives):
neg_is_pos = (y == negatives).all(-1)
y = y.unsqueeze(0)
targets = torch.cat([y, negatives], dim=0)
logits = torch.cosine_similarity(x.float(), targets.float(), dim=-1).type_as(x)
logits = logits / self.logit_temp
if is_xla_tensor(logits) or neg_is_pos.any():
fillval = -float(2 ** 30)
if not hasattr(self, "_inftensor"):
self._inftensor = (
torch.tensor(fillval).to(x.device)
if is_xla_tensor(logits)
else float("-inf")
)
logits[1:] = index_put(logits[1:], neg_is_pos, self._inftensor)
return logits
def _get_feat_extract_output_lengths(self, input_lengths: torch.LongTensor):
"""
Computes the output length of the convolutional layers
"""
def _conv_out_length(input_length, kernel_size, stride):
return torch.floor((input_length - kernel_size) / stride + 1)
conv_cfg_list = eval(self.cfg.conv_feature_layers)
for i in range(len(conv_cfg_list)):
input_lengths = _conv_out_length(
input_lengths, conv_cfg_list[i][1], conv_cfg_list[i][2]
)
return input_lengths.to(torch.long)
def forward(
self,
source,
padding_mask=None,
mask=True,
features_only=False,
layer=None,
mask_indices=None,
mask_channel_indices=None,
padding_count=None,
):
if self.feature_grad_mult > 0:
features = self.feature_extractor(source)
if self.feature_grad_mult != 1.0:
features = GradMultiply.apply(features, self.feature_grad_mult)
else:
with torch.no_grad():
features = self.feature_extractor(source)
features_pen = features.float().pow(2).mean()
features = features.transpose(1, 2)
features = self.layer_norm(features)
unmasked_features = features.clone()
if padding_mask is not None and padding_mask.any():
input_lengths = (1 - padding_mask.long()).sum(-1)
# apply conv formula to get real output_lengths
output_lengths = self._get_feat_extract_output_lengths(input_lengths)
padding_mask = torch.zeros(
features.shape[:2], dtype=features.dtype, device=features.device
)
# these two operations makes sure that all values
# before the output lengths indices are attended to
padding_mask[
(
torch.arange(padding_mask.shape[0], device=padding_mask.device),
output_lengths - 1,
)
] = 1
padding_mask = (1 - padding_mask.flip([-1]).cumsum(-1).flip([-1])).bool()
else:
padding_mask = None
time_steps_to_drop = features.size(1) % self.crop_seq_to_multiple
if time_steps_to_drop != 0:
features = features[:, :-time_steps_to_drop]
unmasked_features = unmasked_features[:, :-time_steps_to_drop]
if padding_mask is not None:
padding_mask = padding_mask[:, :-time_steps_to_drop]
if self.post_extract_proj is not None:
features = self.post_extract_proj(features)
features = self.dropout_input(features)
unmasked_features = self.dropout_features(unmasked_features)
num_vars = None
code_ppl = None
prob_ppl = None
curr_temp = None
if self.input_quantizer:
q = self.input_quantizer(features, produce_targets=False)
features = q["x"]
num_vars = q["num_vars"]
code_ppl = q["code_perplexity"]
prob_ppl = q["prob_perplexity"]
curr_temp = q["temp"]
features = self.project_inp(features)
if mask:
x, mask_indices = self.apply_mask(
features,
padding_mask,
mask_indices=mask_indices,
mask_channel_indices=mask_channel_indices,
)
if not is_xla_tensor(x) and mask_indices is not None:
# tpu-comment: reducing the size in a dynamic way causes
# too many recompilations on xla.
y = unmasked_features[mask_indices].view(
unmasked_features.size(0), -1, unmasked_features.size(-1)
)
else:
y = unmasked_features
else:
x = features
y = unmasked_features
mask_indices = None
x, layer_results = self.encoder(x, padding_mask=padding_mask, layer=layer)
if features_only:
return {
"x": x,
"padding_mask": padding_mask,
"features": unmasked_features,
"layer_results": layer_results,
}
if self.quantizer:
q = self.quantizer(y, produce_targets=False)
y = q["x"]
num_vars = q["num_vars"]
code_ppl = q["code_perplexity"]
prob_ppl = q["prob_perplexity"]
curr_temp = q["temp"]
y = self.project_q(y)
if self.negatives_from_everywhere:
neg_cands = self.quantizer(unmasked_features, produce_targets=False)[
"x"
]
negs, _ = self.sample_negatives(
neg_cands,
y.size(1),
padding_count=padding_count,
)
negs = self.project_q(negs)
else:
negs, _ = self.sample_negatives(
y,
y.size(1),
padding_count=padding_count,
)
if self.codebook_negatives > 0:
cb_negs = self.quantizer.sample_from_codebook(
y.size(0) * y.size(1), self.codebook_negatives
)
cb_negs = cb_negs.view(
self.codebook_negatives, y.size(0), y.size(1), -1
) # order doesnt matter
cb_negs = self.project_q(cb_negs)
negs = torch.cat([negs, cb_negs], dim=0)
else:
y = self.project_q(y)
if self.negatives_from_everywhere:
negs, _ = self.sample_negatives(
unmasked_features,
y.size(1),
padding_count=padding_count,
)
negs = self.project_q(negs)
else:
negs, _ = self.sample_negatives(
y,
y.size(1),
padding_count=padding_count,
)
if not is_xla_tensor(x):
# tpu-comment: reducing the size in a dynamic way causes
# too many recompilations on xla.
x = x[mask_indices].view(x.size(0), -1, x.size(-1))
if self.target_glu:
y = self.target_glu(y)
negs = self.target_glu(negs)
x = self.final_proj(x)
x = self.compute_preds(x, y, negs)
result = {
"x": x,
"padding_mask": padding_mask,
"features_pen": features_pen,
}
if prob_ppl is not None:
result["prob_perplexity"] = prob_ppl
result["code_perplexity"] = code_ppl
result["num_vars"] = num_vars
result["temp"] = curr_temp
return result
def quantize(self, x):
assert self.quantizer is not None
x = self.feature_extractor(x)
x = x.transpose(1, 2)
x = self.layer_norm(x)
return self.quantizer.forward_idx(x)
def extract_features(self, source, padding_mask, mask=False, layer=None):
res = self.forward(
source, padding_mask, mask=mask, features_only=True, layer=layer
)
return res
def get_logits(self, net_output):
logits = net_output["x"]
logits = logits.transpose(0, 2)
logits = logits.reshape(-1, logits.size(-1))
return logits
def get_targets(self, sample, net_output, expand_steps=True):
x = net_output["x"]
return x.new_zeros(x.size(1) * x.size(2), dtype=torch.long)
def get_extra_losses(self, net_output):
pen = []
if "prob_perplexity" in net_output:
pen.append(
(net_output["num_vars"] - net_output["prob_perplexity"])
/ net_output["num_vars"]
)
if "features_pen" in net_output:
pen.append(net_output["features_pen"])
return pen
def remove_pretraining_modules(self):
self.quantizer = None
self.project_q = None
self.target_glu = None
self.final_proj = None
class ConvFeatureExtractionModel(nn.Module):
def __init__(
self,
conv_layers: List[Tuple[int, int, int]],
dropout: float = 0.0,
mode: str = "default",
conv_bias: bool = False,
):
super().__init__()
assert mode in {"default", "layer_norm"}
def block(
n_in,
n_out,
k,
stride,
is_layer_norm=False,
is_group_norm=False,
conv_bias=False,
):
def make_conv():
conv = nn.Conv1d(n_in, n_out, k, stride=stride, bias=conv_bias)
nn.init.kaiming_normal_(conv.weight)
return conv
assert is_layer_norm and is_group_norm is False, "layer norm and group norm are exclusive"
if is_layer_norm:
return nn.Sequential(
make_conv(),
nn.Dropout(p=dropout),
nn.Sequential(
TransposeLast(),
Fp32LayerNorm(dim, elementwise_affine=True),
TransposeLast(),
),
nn.GELU(),
)
elif is_group_norm:
return nn.Sequential(
make_conv(),
nn.Dropout(p=dropout),
Fp32GroupNorm(dim, dim, affine=True),
nn.GELU(),
)
else:
return nn.Sequential(make_conv(), nn.Dropout(p=dropout), nn.GELU())
in_d = 1
self.conv_layers = nn.ModuleList()
for i, cl in enumerate(conv_layers):
assert len(cl) == 3, "invalid conv definition: " + str(cl)
(dim, k, stride) = cl
self.conv_layers.append(
block(
in_d,
dim,
k,
stride,
is_layer_norm=mode == "layer_norm",
is_group_norm=mode == "default" and i == 0,
conv_bias=conv_bias,
)
)
in_d = dim
def forward(self, x):
# BxT -> BxCxT
x = x.unsqueeze(1)
for conv in self.conv_layers:
x = conv(x)
return x
class TransformerEncoder(nn.Module):
def build_encoder_layer(self, args):
if args.layer_type == "transformer":
layer = TransformerSentenceEncoderLayer(
embedding_dim=self.embedding_dim,
ffn_embedding_dim=args.encoder_ffn_embed_dim,
num_attention_heads=args.encoder_attention_heads,
dropout=self.dropout,
attention_dropout=args.attention_dropout,
activation_dropout=args.activation_dropout,
activation_fn=args.activation_fn,
layer_norm_first=args.layer_norm_first,
)
elif args.layer_type == "conformer":
layer = ConformerWav2Vec2EncoderLayer(
embed_dim=self.embedding_dim,
ffn_embed_dim=args.encoder_ffn_embed_dim,
attention_heads=args.encoder_attention_heads,
dropout=args.dropout,
depthwise_conv_kernel_size=args.depthwise_conv_kernel_size,
activation_fn="swish",
attn_type=args.attn_type,
use_fp16=args.fp16,
pos_enc_type="abs",
)
layer = fsdp_wrap(layer)
if args.checkpoint_activations:
layer = checkpoint_wrapper(layer)
return layer
def __init__(self, args):
super().__init__()
self.dropout = args.dropout
self.embedding_dim = args.encoder_embed_dim
self.required_seq_len_multiple = args.required_seq_len_multiple
self.pos_conv = nn.Conv1d(
self.embedding_dim,
self.embedding_dim,
kernel_size=args.conv_pos,
padding=args.conv_pos // 2,
groups=args.conv_pos_groups,
)
dropout = 0
std = math.sqrt((4 * (1.0 - dropout)) / (args.conv_pos * self.embedding_dim))
nn.init.normal_(self.pos_conv.weight, mean=0, std=std)
nn.init.constant_(self.pos_conv.bias, 0)
self.pos_conv = nn.utils.weight_norm(self.pos_conv, name="weight", dim=2)
self.pos_conv = nn.Sequential(self.pos_conv, SamePad(args.conv_pos), nn.GELU())
self.layers = nn.ModuleList(
[self.build_encoder_layer(args) for _ in range(args.encoder_layers)]
)
self.layer_norm_first = args.layer_norm_first
self.layer_norm = LayerNorm(self.embedding_dim)
self.layerdrop = args.encoder_layerdrop
self.apply(init_bert_params)
def forward(self, x, padding_mask=None, layer=None):
x, layer_results = self.extract_features(x, padding_mask, layer)
if self.layer_norm_first and layer is None:
x = self.layer_norm(x)
return x, layer_results
def extract_features(self, x, padding_mask=None, tgt_layer=None):
if padding_mask is not None:
x = index_put(x, padding_mask, 0)
x_conv = self.pos_conv(x.transpose(1, 2))
x_conv = x_conv.transpose(1, 2)
x = x + x_conv
if not self.layer_norm_first:
x = self.layer_norm(x)
# pad to the sequence length dimension
x, pad_length = pad_to_multiple(
x, self.required_seq_len_multiple, dim=-2, value=0
)
if pad_length > 0 and padding_mask is None:
padding_mask = x.new_zeros((x.size(0), x.size(1)), dtype=torch.bool)
padding_mask[:, -pad_length:] = True
else:
padding_mask, _ = pad_to_multiple(
padding_mask, self.required_seq_len_multiple, dim=-1, value=True
)
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
layer_results = []
r = None
for i, layer in enumerate(self.layers):
dropout_probability = np.random.random()
if not self.training or (dropout_probability > self.layerdrop):
x, z = layer(x, self_attn_padding_mask=padding_mask, need_weights=False)
if tgt_layer is not None:
# unpad if needed
if pad_length > 0:
layer_results.append(
(
x[:-pad_length],
z[:, :-pad_length, :-pad_length]
if z is not None
else z,
)
)
else:
layer_results.append((x, z))
if i == tgt_layer:
r = x
break
if r is not None:
x = r
# T x B x C -> B x T x C
x = x.transpose(0, 1)
# undo paddding
if pad_length > 0:
x = x[:, :-pad_length]
return x, layer_results
def max_positions(self):
"""Maximum output length supported by the encoder."""
return self.args.max_positions
def upgrade_state_dict_named(self, state_dict, name):
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
return state_dict
class ConformerEncoder(TransformerEncoder):
def build_encoder_layer(self, args):
layer = ConformerWav2Vec2EncoderLayer(
embed_dim=self.embedding_dim,
ffn_embed_dim=args.encoder_ffn_embed_dim,
attention_heads=args.encoder_attention_heads,
dropout=args.dropout,
depthwise_conv_kernel_size=args.depthwise_conv_kernel_size,
activation_fn="swish",
attn_type=args.attn_type,
pos_enc_type=args.pos_enc_type,
use_fp16=args.fp16, # only used for rope
)
layer = fsdp_wrap(layer)
if args.checkpoint_activations:
layer = checkpoint_wrapper(layer)
return layer
def __init__(self, args):
super().__init__(args)
self.args = args
self.dropout = args.dropout
self.embedding_dim = args.encoder_embed_dim
self.pos_enc_type = args.pos_enc_type
max_source_positions = self.max_positions()
if self.pos_enc_type == "rel_pos":
self.embed_positions = RelPositionalEncoding(
max_source_positions, self.embedding_dim
)
elif self.pos_enc_type == "rope":
self.embed_positions = None
else:
raise Exception("Unsupported positional encoding type")
self.layers = nn.ModuleList(
[self.build_encoder_layer(args) for _ in range(args.encoder_layers)]
)
self.layer_norm_first = args.layer_norm_first
self.layer_norm = LayerNorm(self.embedding_dim)
self.layerdrop = args.encoder_layerdrop
self.apply(init_bert_params)
def extract_features(self, x, padding_mask=None, tgt_layer=None):
if padding_mask is not None:
x = index_put(x, padding_mask, 0)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
# B X T X C here
position_emb = None
if self.pos_enc_type == "rel_pos":
position_emb = self.embed_positions(x)
if not self.layer_norm_first:
x = self.layer_norm(x)
x = F.dropout(x, p=self.dropout, training=self.training)
layer_results = []
r = None
for i, layer in enumerate(self.layers):
dropout_probability = np.random.random()
if not self.training or (dropout_probability > self.layerdrop):
x, z = layer(
x,
self_attn_padding_mask=padding_mask,
need_weights=False,
position_emb=position_emb,
)
if tgt_layer is not None:
layer_results.append((x, z))
if i == tgt_layer:
r = x
break
if r is not None:
x = r
# T x B x C -> B x T x C
x = x.transpose(0, 1)
return x, layer_results
class TransformerSentenceEncoderLayer(nn.Module):
"""
Implements a Transformer Encoder Layer used in BERT/XLM style pre-trained
models.
"""
def __init__(
self,
embedding_dim: float = 768,
ffn_embedding_dim: float = 3072,
num_attention_heads: float = 8,
dropout: float = 0.1,
attention_dropout: float = 0.1,
activation_dropout: float = 0.1,
activation_fn: str = "relu",
layer_norm_first: bool = False,
) -> None:
super().__init__()
# Initialize parameters
self.embedding_dim = embedding_dim
self.dropout = dropout
self.activation_dropout = activation_dropout
# Initialize blocks
self.activation_fn = utils.get_activation_fn(activation_fn)
self.self_attn = MultiheadAttention(
self.embedding_dim,
num_attention_heads,
dropout=attention_dropout,
self_attention=True,
)
self.dropout1 = nn.Dropout(dropout)
self.dropout2 = nn.Dropout(self.activation_dropout)
self.dropout3 = nn.Dropout(dropout)
self.layer_norm_first = layer_norm_first
# layer norm associated with the self attention layer
self.self_attn_layer_norm = LayerNorm(self.embedding_dim)
self.fc1 = nn.Linear(self.embedding_dim, ffn_embedding_dim)
self.fc2 = nn.Linear(ffn_embedding_dim, self.embedding_dim)
# layer norm associated with the position wise feed-forward NN
self.final_layer_norm = LayerNorm(self.embedding_dim)
def forward(
self,
x: torch.Tensor,
self_attn_mask: torch.Tensor = None,
self_attn_padding_mask: torch.Tensor = None,
need_weights: bool = False,
att_args=None,
):
"""
LayerNorm is applied either before or after the self-attention/ffn
modules similar to the original Transformer imlementation.
"""
residual = x
if self.layer_norm_first:
x = self.self_attn_layer_norm(x)
x, attn = self.self_attn(
query=x,
key=x,
value=x,
key_padding_mask=self_attn_padding_mask,
attn_mask=self_attn_mask,
)
x = self.dropout1(x)
x = residual + x
residual = x
x = self.final_layer_norm(x)
x = self.activation_fn(self.fc1(x))
x = self.dropout2(x)
x = self.fc2(x)
x = self.dropout3(x)
x = residual + x
else:
x, attn = self.self_attn(
query=x,
key=x,
value=x,
key_padding_mask=self_attn_padding_mask,
)
x = self.dropout1(x)
x = residual + x
x = self.self_attn_layer_norm(x)
residual = x
x = self.activation_fn(self.fc1(x))
x = self.dropout2(x)
x = self.fc2(x)
x = self.dropout3(x)
x = residual + x
x = self.final_layer_norm(x)
return x, attn
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/wav2vec/wav2vec2.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
import torch.nn.functional as F
def pad_to_multiple(x, multiple, dim=-1, value=0):
# Inspired from https://github.com/lucidrains/local-attention/blob/master/local_attention/local_attention.py#L41
if x is None:
return None, 0
tsz = x.size(dim)
m = tsz / multiple
remainder = math.ceil(m) * multiple - tsz
if m.is_integer():
return x, 0
pad_offset = (0,) * (-1 - dim) * 2
return F.pad(x, (*pad_offset, 0, remainder), value=value), remainder
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/wav2vec/utils.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from dataclasses import dataclass, field
import logging
import math
from typing import Optional, Tuple
from omegaconf import II
import sys
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq.dataclass import ChoiceEnum, FairseqDataclass
from fairseq.models import BaseFairseqModel, register_model
from fairseq.modules import (
Fp32GroupNorm,
Fp32LayerNorm,
GumbelVectorQuantizer,
KmeansVectorQuantizer,
TransposeLast,
)
from fairseq.tasks import FairseqTask
from fairseq.utils import buffered_arange
logger = logging.getLogger(__name__)
AGGREGATOR_CHOICES = ChoiceEnum(["cnn", "gru"])
PROJECT_FEATURES_CHOICES = ChoiceEnum(["none", "same", "new"])
ACTIVATION_CHOICES = ChoiceEnum(["relu", "gelu"])
VQ_TYPE_CHOICES = ChoiceEnum(["none", "gumbel", "kmeans"])
@dataclass
class Wav2VecConfig(FairseqDataclass):
prediction_steps: int = field(
default=12, metadata={"help": "number of steps ahead to predict"}
)
sample_distance: Optional[int] = field(
default=None,
metadata={
"help": "sample distance from target. does not work properly with cross-sampling"
},
)
cross_sample_negatives: int = field(
default=0, metadata={"help": "num of cross sampled negatives"}
)
num_negatives: int = field(
default=10, metadata={"help": "num of sampled negatives"}
)
conv_feature_layers: str = field(
default="[(512, 10, 5), (512, 8, 4), (512, 4, 2), (512, 4, 2), (512, 4, 2), (512, 1, 1), (512, 1, 1), (512, 1, 1)]",
metadata={
"help": "convolutional feature extraction layers [(dim, kernel_size, stride), ...]"
},
)
conv_aggregator_layers: str = field(
default="[(512, 2, 1), (512, 3, 1), (512, 4, 1), (512, 5, 1), (512, 6, 1), (512, 7, 1), (512, 8, 1), (512, 9, 1), (512, 10, 1), (512, 11, 1), (512, 12, 1), (512, 13, 1)]",
metadata={
"help": "convolutional aggregator layers [(dim, kernel_size, stride), ...]"
},
)
dropout: float = field(
default=0.0, metadata={"help": "dropout to apply within the model"}
)
dropout_features: float = field(
default=0.0, metadata={"help": "dropout to apply to the features"}
)
dropout_agg: float = field(
default=0.0, metadata={"help": "dropout to apply after aggregation step"}
)
aggregator: AGGREGATOR_CHOICES = field(
default="cnn", metadata={"help": "type of aggregator to use"}
)
gru_dim: int = field(default=512, metadata={"help": "GRU dimensionality"})
no_conv_bias: bool = field(
default=False, metadata={"help": "if set, does not learn bias for conv layers"}
)
agg_zero_pad: bool = field(
default=False,
metadata={"help": "if set, zero pads in aggregator instead of repl pad"},
)
skip_connections_feat: bool = field(
default=False,
metadata={"help": "if set, adds skip connections to the feature extractor"},
)
skip_connections_agg: bool = field(
default=True,
metadata={"help": "if set, adds skip connections to the aggregator"},
)
residual_scale: float = field(
default=0.5, metadata={"help": "scales residual by sqrt(value)"}
)
log_compression: bool = field(
default=True,
metadata={"help": "if set, adds a log compression to feature extractor"},
)
balanced_classes: bool = field(
default=False,
metadata={"help": "if set, loss is scaled to balance for number of negatives"},
)
project_features: PROJECT_FEATURES_CHOICES = field(
default="none",
metadata={
"help": "if not none, features are projected using the (same or new) aggregator"
},
)
non_affine_group_norm: bool = field(
default=False, metadata={"help": "if set, group norm is not affine"}
)
offset: str = field(
default="auto",
metadata={
"help": "if set to 'auto', it is computed automatically from the receptive field, else set to int value"
},
)
activation: ACTIVATION_CHOICES = field(
default="relu",
metadata={
"help": "if set to 'auto', it is computed automatically from the receptive field, else set to int value"
},
)
vq_type: VQ_TYPE_CHOICES = field(
default="none", metadata={"help": "which type of quantizer to use"}
)
vq_vars: int = field(
default=320,
metadata={"help": "project to this many vector quantized variables per group"},
)
vq_groups: int = field(
default=2, metadata={"help": "number of groups of latent variables"}
)
vq_dim: int = field(
default=0,
metadata={
"help": "uses this dimensionality for quantized vectors. 0 to use model dim // groups"
},
)
vq_depth: int = field(
default=1, metadata={"help": "number of layers for vq weight projection"}
)
combine_groups: bool = field(
default=False, metadata={"help": "if set, variables are shared among groups"}
)
vq_temp: Tuple[float, float, float] = field(
default=(2.0, 0.5, 0.999995),
metadata={
"help": "temperature for latent variable sampling with gumbel softmax. should be a tuple of 3 values (start, end, decay)"
},
)
vq_gamma: float = field(
default=0.25,
metadata={"help": "gamma parameter for kmeans style vector quantization"},
)
infonce: bool = II("criterion.infonce")
@register_model("wav2vec", dataclass=Wav2VecConfig)
class Wav2VecModel(BaseFairseqModel):
@classmethod
def build_model(cls, cfg: Wav2VecConfig, task: FairseqTask):
"""Build a new model instance."""
model = Wav2VecModel(cfg)
logger.info(model)
return model
def __init__(self, cfg: Wav2VecConfig):
super().__init__()
self.prediction_steps = cfg.prediction_steps
offset = cfg.offset
if cfg.activation == "relu":
activation = nn.ReLU()
elif cfg.activation == "gelu":
activation = nn.GELU()
else:
raise Exception("unknown activation " + cfg.activation)
feature_enc_layers = eval(cfg.conv_feature_layers)
self.feature_extractor = ConvFeatureExtractionModel(
conv_layers=feature_enc_layers,
dropout=0.0,
log_compression=cfg.log_compression,
skip_connections=cfg.skip_connections_feat,
residual_scale=cfg.residual_scale,
non_affine_group_norm=cfg.non_affine_group_norm,
activation=activation,
)
embed = feature_enc_layers[-1][0]
self.vector_quantizer = None
if cfg.vq_type == "gumbel":
self.vector_quantizer = GumbelVectorQuantizer(
dim=embed,
num_vars=cfg.vq_vars,
temp=cfg.vq_temp,
groups=cfg.vq_groups,
combine_groups=cfg.combine_groups,
vq_dim=cfg.vq_dim if cfg.vq_dim > 0 else embed,
time_first=False,
activation=activation,
weight_proj_depth=cfg.vq_depth,
weight_proj_factor=2,
)
elif cfg.vq_type == "kmeans":
self.vector_quantizer = KmeansVectorQuantizer(
dim=embed,
num_vars=cfg.vq_vars,
groups=cfg.vq_groups,
combine_groups=cfg.combine_groups,
vq_dim=cfg.vq_dim if cfg.vq_dim > 0 else embed,
time_first=False,
gamma=cfg.vq_gamma,
)
else:
assert (
cfg.vq_type == "none" or cfg.vq_type is None
), "Unknown quantizer type"
if cfg.offset == "auto":
jin = 0
rin = 0
for _, k, stride in feature_enc_layers:
if rin == 0:
rin = k
rin = rin + (k - 1) * jin
if jin == 0:
jin = stride
else:
jin *= stride
offset = math.ceil(rin / jin)
offset = int(offset)
def make_aggregator():
if cfg.aggregator == "cnn":
agg_layers = eval(cfg.conv_aggregator_layers)
agg_dim = agg_layers[-1][0]
feature_aggregator = ConvAggegator(
conv_layers=agg_layers,
embed=embed,
dropout=cfg.dropout,
skip_connections=cfg.skip_connections_agg,
residual_scale=cfg.residual_scale,
non_affine_group_norm=cfg.non_affine_group_norm,
conv_bias=not cfg.no_conv_bias,
zero_pad=cfg.agg_zero_pad,
activation=activation,
)
elif cfg.aggregator == "gru":
agg_dim = cfg.gru_dim
feature_aggregator = nn.Sequential(
TransposeLast(),
nn.GRU(
input_size=embed,
hidden_size=agg_dim,
num_layers=1,
dropout=cfg.dropout,
),
TransposeLast(deconstruct_idx=0),
)
else:
raise Exception("unknown aggregator type " + cfg.aggregator)
return feature_aggregator, agg_dim
self.feature_aggregator, agg_dim = make_aggregator()
self.wav2vec_predictions = Wav2VecPredictionsModel(
in_dim=agg_dim,
out_dim=embed,
prediction_steps=cfg.prediction_steps,
n_negatives=cfg.num_negatives,
cross_sample_negatives=cfg.cross_sample_negatives,
sample_distance=cfg.sample_distance,
dropout=cfg.dropout,
offset=offset,
balanced_classes=cfg.balanced_classes,
infonce=cfg.infonce,
)
self.dropout_feats = nn.Dropout(p=cfg.dropout_features)
self.dropout_agg = nn.Dropout(p=cfg.dropout_agg)
if cfg.project_features == "none":
self.project_features = None
elif cfg.project_features == "same":
self.project_features = self.feature_aggregator
elif cfg.project_features == "new":
self.project_features, _ = make_aggregator()
def forward(self, source):
result = {}
features = self.feature_extractor(source)
if self.vector_quantizer:
q_res = self.vector_quantizer(features)
features = q_res["x"]
for k in q_res.keys():
if k != "x":
result[k] = q_res[k]
x = self.dropout_feats(features)
x = self.feature_aggregator(x)
x = self.dropout_agg(x)
if self.project_features is not None:
features = self.project_features(features)
x, targets = self.wav2vec_predictions(x, features)
result["cpc_logits"] = x
result["cpc_targets"] = targets
return result
def upgrade_state_dict_named(self, state_dict, name):
super().upgrade_state_dict_named(state_dict, name)
def max_positions(self):
"""Maximum length supported by the model."""
return sys.maxsize
def get_logits(self, net_output):
logits = net_output["cpc_logits"]
return logits
def get_targets(self, sample, net_output):
t = net_output["cpc_targets"]
if isinstance(t, tuple):
t = t[0]
return t.contiguous()
def get_target_weights(self, targets, net_output):
targets = net_output["cpc_targets"]
if isinstance(targets, tuple) and targets[-1] is not None:
return targets[-1]
return None
def get_extra_losses(self, net_output):
loss = None
if "prob_perplexity" in net_output:
loss = net_output["num_vars"] - net_output["prob_perplexity"]
elif "kmeans_loss" in net_output:
loss = net_output["kmeans_loss"]
return loss
def norm_block(is_layer_norm, dim, affine=True):
if is_layer_norm:
mod = nn.Sequential(
TransposeLast(),
Fp32LayerNorm(dim, elementwise_affine=affine),
TransposeLast(),
)
else:
mod = Fp32GroupNorm(1, dim, affine=affine)
return mod
class ConvFeatureExtractionModel(nn.Module):
def __init__(
self,
conv_layers,
dropout,
log_compression,
skip_connections,
residual_scale,
non_affine_group_norm,
activation,
):
super().__init__()
def block(n_in, n_out, k, stride):
return nn.Sequential(
nn.Conv1d(n_in, n_out, k, stride=stride, bias=False),
nn.Dropout(p=dropout),
norm_block(
is_layer_norm=False, dim=n_out, affine=not non_affine_group_norm
),
activation,
)
in_d = 1
self.conv_layers = nn.ModuleList()
for dim, k, stride in conv_layers:
self.conv_layers.append(block(in_d, dim, k, stride))
in_d = dim
self.log_compression = log_compression
self.skip_connections = skip_connections
self.residual_scale = math.sqrt(residual_scale)
def forward(self, x):
# BxT -> BxCxT
x = x.unsqueeze(1)
for conv in self.conv_layers:
residual = x
x = conv(x)
if self.skip_connections and x.size(1) == residual.size(1):
tsz = x.size(2)
r_tsz = residual.size(2)
residual = residual[..., :: r_tsz // tsz][..., :tsz]
x = (x + residual) * self.residual_scale
if self.log_compression:
x = x.abs()
x = x + 1
x = x.log()
return x
class ZeroPad1d(nn.Module):
def __init__(self, pad_left, pad_right):
super().__init__()
self.pad_left = pad_left
self.pad_right = pad_right
def forward(self, x):
return F.pad(x, (self.pad_left, self.pad_right))
class ConvAggegator(nn.Module):
def __init__(
self,
conv_layers,
embed,
dropout,
skip_connections,
residual_scale,
non_affine_group_norm,
conv_bias,
zero_pad,
activation,
):
super().__init__()
def block(n_in, n_out, k, stride):
# padding dims only really make sense for stride = 1
ka = k // 2
kb = ka - 1 if k % 2 == 0 else ka
pad = (
ZeroPad1d(ka + kb, 0) if zero_pad else nn.ReplicationPad1d((ka + kb, 0))
)
return nn.Sequential(
pad,
nn.Conv1d(n_in, n_out, k, stride=stride, bias=conv_bias),
nn.Dropout(p=dropout),
norm_block(False, n_out, affine=not non_affine_group_norm),
activation,
)
in_d = embed
self.conv_layers = nn.ModuleList()
self.residual_proj = nn.ModuleList()
for dim, k, stride in conv_layers:
if in_d != dim and skip_connections:
self.residual_proj.append(nn.Conv1d(in_d, dim, 1, bias=False))
else:
self.residual_proj.append(None)
self.conv_layers.append(block(in_d, dim, k, stride))
in_d = dim
self.conv_layers = nn.Sequential(*self.conv_layers)
self.skip_connections = skip_connections
self.residual_scale = math.sqrt(residual_scale)
def forward(self, x):
for rproj, conv in zip(self.residual_proj, self.conv_layers):
residual = x
x = conv(x)
if self.skip_connections:
if rproj is not None:
residual = rproj(residual)
x = (x + residual) * self.residual_scale
return x
class Wav2VecPredictionsModel(nn.Module):
def __init__(
self,
in_dim,
out_dim,
prediction_steps,
n_negatives,
cross_sample_negatives,
sample_distance,
dropout,
offset,
balanced_classes,
infonce,
):
super().__init__()
self.n_negatives = n_negatives
self.cross_sample_negatives = cross_sample_negatives
self.sample_distance = sample_distance
self.project_to_steps = nn.ConvTranspose2d(
in_dim, out_dim, (1, prediction_steps)
)
self.dropout = nn.Dropout(p=dropout)
self.offset = offset
self.balanced_classes = balanced_classes
self.infonce = infonce
def sample_negatives(self, y):
bsz, fsz, tsz = y.shape
y = y.transpose(0, 1) # BCT -> CBT
y = y.contiguous().view(fsz, -1) # CBT => C(BxT)
cross_high = tsz * bsz
high = tsz if self.sample_distance is None else min(tsz, self.sample_distance)
assert high > 1
neg_idxs = torch.randint(low=0, high=high, size=(bsz, self.n_negatives * tsz))
with torch.no_grad():
if self.n_negatives > 0:
tszs = (
buffered_arange(tsz)
.unsqueeze(-1)
.expand(-1, self.n_negatives)
.flatten()
)
neg_idxs = torch.randint(
low=0, high=high - 1, size=(bsz, self.n_negatives * tsz)
)
neg_idxs[neg_idxs >= tszs] += 1
if self.cross_sample_negatives > 0:
tszs = (
buffered_arange(tsz)
.unsqueeze(-1)
.expand(-1, self.cross_sample_negatives)
.flatten()
)
cross_neg_idxs = torch.randint(
low=0,
high=cross_high - 1,
size=(bsz, self.cross_sample_negatives * tsz),
)
cross_neg_idxs[cross_neg_idxs >= tszs] += 1
if self.n_negatives > 0:
for i in range(1, bsz):
neg_idxs[i] += i * high
else:
neg_idxs = cross_neg_idxs
if self.cross_sample_negatives > 0 and self.n_negatives > 0:
neg_idxs = torch.cat([neg_idxs, cross_neg_idxs], dim=1)
negs = y[..., neg_idxs.view(-1)]
negs = negs.view(
fsz, bsz, self.n_negatives + self.cross_sample_negatives, tsz
).permute(
2, 1, 0, 3
) # to NxBxCxT
return negs
def forward(self, x, y):
x = x.unsqueeze(-1)
x = self.project_to_steps(x) # BxCxTxS
x = self.dropout(x)
negatives = self.sample_negatives(y)
y = y.unsqueeze(0)
targets = torch.cat([y, negatives], dim=0) # Copies x B x C x T
copies = targets.size(0)
bsz, dim, tsz, steps = x.shape
steps = min(steps, tsz - self.offset)
predictions = x.new(
bsz * copies * (tsz - self.offset + 1) * steps
- ((steps + 1) * steps // 2) * copies * bsz
)
if self.infonce:
labels = predictions.new_full(
(predictions.shape[0] // copies,), 0, dtype=torch.long
)
else:
labels = torch.zeros_like(predictions)
weights = (
torch.full_like(labels, 1 / self.n_negatives)
if self.balanced_classes and not self.infonce
else None
)
start = end = 0
for i in range(steps):
offset = i + self.offset
end = start + (tsz - offset) * bsz * copies
if self.infonce:
predictions[start:end] = torch.einsum(
"bct,nbct->tbn", x[..., :-offset, i], targets[..., offset:]
).flatten()
else:
pos_num = (end - start) // copies
predictions[start:end] = torch.einsum(
"bct,nbct->nbt", x[..., :-offset, i], targets[..., offset:]
).flatten()
labels[start : start + pos_num] = 1.0
if weights is not None:
weights[start : start + pos_num] = 1.0
start = end
assert end == predictions.numel(), "{} != {}".format(end, predictions.numel())
if self.infonce:
predictions = predictions.view(-1, copies)
else:
if weights is not None:
labels = (labels, weights)
return predictions, labels
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/wav2vec/wav2vec.py
|
import argparse
import logging
import torch.nn as nn
import fairseq.checkpoint_utils
from fairseq.models import (
FairseqEncoderDecoderModel,
register_model,
register_model_architecture,
)
from fairseq.models.transformer import TransformerDecoder
from fairseq.models.roberta import model as roberta
logger = logging.getLogger(__name__)
@register_model("roberta_enc_dec")
class RobertaEncDecModel(FairseqEncoderDecoderModel):
@staticmethod
def add_args(parser):
parser.add_argument(
"--pretrained-mlm-checkpoint",
default=None,
type=str,
metavar="PRETRAINED",
help="path to pretrained mlm checkpoint",
)
parser.add_argument(
"--pretrained-decoder", action="store_true", help="reload decoder"
)
parser.add_argument(
"--hack-layernorm-embedding",
action="store_true",
help="hack to reload old models trained with encoder-normalize-before=False (no equivalent to encoder-normalize-before=False and layernorm_embedding=False",
)
parser.add_argument(
"--share-decoder-input-output-embed",
action="store_true",
help="share decoder input and output embeddings",
)
parser.add_argument(
"--share-all-embeddings",
action="store_true",
help="share encoder, decoder and output embeddings"
" (requires shared dictionary and embed dim)",
)
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
# make sure all arguments are present
base_enc_dec_architecture(args)
if args.pretrained_mlm_checkpoint:
arg_overrides = None
if args.hack_layernorm_embedding:
arg_overrides = {"layernorm_embedding": False}
loaded = fairseq.checkpoint_utils.load_model_ensemble_and_task(
[args.pretrained_mlm_checkpoint], arg_overrides=arg_overrides
)
([roberta_enc], _cfg, _task) = loaded
else:
# Do we need to edit untie_weights here ?
share_in_out = (
args.share_decoder_input_output_embed or args.share_all_embeddings
)
args.untie_weights_roberta = not share_in_out
if args.hack_layernorm_embedding:
args.layernorm_embedding = False
args.encoder_normalize_before = False
roberta_enc = roberta.RobertaModel.build_model(args, task)
return cls.from_roberta(roberta_enc, args, task.source_dictionary)
@staticmethod
def from_roberta(roberta_enc: roberta.RobertaModel, args, dictionary):
encoder = roberta_enc.encoder.sentence_encoder
vocab_size, embed_dim = encoder.embed_tokens.weight.shape
if args.share_all_embeddings:
lm_head = roberta_enc.encoder.lm_head
assert encoder.embed_tokens.weight is lm_head.weight, (
"Can't use --share-all-embeddings with a model "
"that was pretraiend with --untie-weights-roberta_enc"
)
else:
lm_head = roberta.RobertaLMHead(
embed_dim, vocab_size, roberta_enc.args.activation_fn
)
dec_embs = nn.Embedding(vocab_size, embed_dim, dictionary.pad())
if args.share_all_embeddings or args.share_decoder_input_output_embed:
# Note: I wasn't able to use Embedding _weight parameter to achive this sharing.
dec_embs.weight = lm_head.weight
decoder = TransformerDecoder(
RobertaEncDecModel.read_args_from_roberta(roberta_enc.args),
dictionary,
dec_embs,
no_encoder_attn=False,
output_projection=lm_head,
)
if getattr(args, "pretrained_decoder", False):
decoder_dict = encoder.state_dict()
# TODO: hide setting "encoder_attn" layers behind a flag.
for k, w in list(decoder_dict.items()):
if ".self_attn" in k:
k_enc_attn = k.replace(".self_attn", ".encoder_attn")
decoder_dict[k_enc_attn] = w.detach().clone()
for k, w in lm_head.state_dict().items():
decoder_dict["output_projection." + k] = w
missing_keys, unexpected_keys = decoder.load_state_dict(
decoder_dict, strict=False
)
# missing_keys = [m for m in missing_keys if ".encoder_attn" not in m]
assert not missing_keys and not unexpected_keys, (
"Failed to load state dict. "
f"Missing keys: {missing_keys}. "
f"Unexpected keys: {unexpected_keys}."
)
if args.share_all_embeddings:
assert decoder.output_projection.weight is decoder.embed_tokens.weight
assert encoder.embed_tokens.weight is decoder.embed_tokens.weight
elif args.share_decoder_input_output_embed:
assert decoder.output_projection.weight is decoder.embed_tokens.weight
assert encoder.embed_tokens.weight is not decoder.embed_tokens.weight
else:
assert decoder.output_projection.weight is not decoder.embed_tokens.weight
assert encoder.embed_tokens.weight is not decoder.embed_tokens.weight
return RobertaEncDecModel(encoder, decoder)
@staticmethod
def read_args_from_roberta(roberta_args: argparse.Namespace):
# TODO: this would become easier if encoder/decoder where using a similar
# TransformerConfig object
args = argparse.Namespace(**vars(roberta_args))
attr_map = [
("encoder_attention_heads", "decoder_attention_heads"),
("encoder_embed_dim", "decoder_embed_dim"),
("encoder_embed_dim", "decoder_output_dim"),
("encoder_normalize_before", "decoder_normalize_before"),
("encoder_layers_to_keep", "decoder_layers_to_keep"),
("encoder_ffn_embed_dim", "decoder_ffn_embed_dim"),
("encoder_layerdrop", "decoder_layerdrop"),
("encoder_layers", "decoder_layers"),
("encoder_learned_pos", "decoder_learned_pos"),
# should this be set from here ?
("max_positions", "max_target_positions"),
]
for k1, k2 in attr_map:
setattr(args, k2, getattr(roberta_args, k1))
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.share_decoder_input_output_embed = not roberta_args.untie_weights_roberta
return args
def upgrade_state_dict_named(self, state_dict, name):
prefix = name + "." if name != "" else ""
super().upgrade_state_dict_named(state_dict, name)
old_keys = list(state_dict.keys())
# rename decoder -> encoder before upgrading children modules
for k in old_keys:
if k.startswith(prefix + "encoder.lm_head"):
state_dict.pop(k)
continue
new_k = k
new_k = new_k.replace(".sentence_encoder.", ".")
new_k = new_k.replace("decoder.lm_head.", "decoder.output_projection.")
if k == new_k:
continue
# print(k, "->", new_k)
state_dict[new_k] = state_dict.pop(k)
@register_model_architecture("roberta_enc_dec", "roberta_enc_dec")
def base_enc_dec_architecture(args):
args.hack_layernorm_embedding = getattr(args, "hack_layernorm_embedding", False)
args.pretrained_mlm_checkpoint = getattr(args, "pretrained_mlm_checkpoint", None)
args.pretrained_decoder = getattr(args, "pretrained_decoder", None)
args.share_all_embeddings = getattr(args, "share_all_embeddings", False)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
roberta.base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/enc_dec.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
GottBERT: a pure German Language Model
"""
from fairseq.models import register_model
from .hub_interface import RobertaHubInterface
from .model import RobertaModel
@register_model("gottbert")
class GottbertModel(RobertaModel):
@classmethod
def hub_models(cls):
return {
"gottbert-base": "https://dl.gottbert.de/fairseq/models/gottbert-base.tar.gz",
}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
bpe="hf_byte_bpe",
bpe_vocab="vocab.json",
bpe_merges="merges.txt",
bpe_add_prefix_space=False,
**kwargs
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
bpe=bpe,
load_checkpoint_heads=True,
bpe_vocab=bpe_vocab,
bpe_merges=bpe_merges,
bpe_add_prefix_space=bpe_add_prefix_space,
**kwargs,
)
return RobertaHubInterface(x["args"], x["task"], x["models"][0])
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/model_gottbert.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
Unsupervised Cross-lingual Representation Learning at Scale
"""
from fairseq.models import register_model
from .hub_interface import RobertaHubInterface
from .model import RobertaModel
@register_model("xlmr")
class XLMRModel(RobertaModel):
@classmethod
def hub_models(cls):
return {
"xlmr.base": "http://dl.fbaipublicfiles.com/fairseq/models/xlmr.base.tar.gz",
"xlmr.large": "http://dl.fbaipublicfiles.com/fairseq/models/xlmr.large.tar.gz",
"xlmr.xl": "http://dl.fbaipublicfiles.com/fairseq/models/xlmr/xlmr.xl.tar.gz",
"xlmr.xxl": "http://dl.fbaipublicfiles.com/fairseq/models/xlmr/xlmr.xxl.tar.gz",
}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
bpe="sentencepiece",
**kwargs
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
bpe=bpe,
load_checkpoint_heads=True,
**kwargs,
)
return RobertaHubInterface(x["args"], x["task"], x["models"][0])
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/model_xlmr.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from collections import Counter
from typing import List
import torch
def align_bpe_to_words(roberta, bpe_tokens: torch.LongTensor, other_tokens: List[str]):
"""
Helper to align GPT-2 BPE to other tokenization formats (e.g., spaCy).
Args:
roberta (RobertaHubInterface): RoBERTa instance
bpe_tokens (torch.LongTensor): GPT-2 BPE tokens of shape `(T_bpe)`
other_tokens (List[str]): other tokens of shape `(T_words)`
Returns:
List[str]: mapping from *other_tokens* to corresponding *bpe_tokens*.
"""
assert bpe_tokens.dim() == 1
assert bpe_tokens[0] == 0
def clean(text):
return text.strip()
# remove whitespaces to simplify alignment
bpe_tokens = [roberta.task.source_dictionary.string([x]) for x in bpe_tokens]
bpe_tokens = [
clean(roberta.bpe.decode(x) if x not in {"<s>", ""} else x) for x in bpe_tokens
]
other_tokens = [clean(str(o)) for o in other_tokens]
# strip leading <s>
bpe_tokens = bpe_tokens[1:]
assert "".join(bpe_tokens) == "".join(other_tokens)
# create alignment from every word to a list of BPE tokens
alignment = []
bpe_toks = filter(lambda item: item[1] != "", enumerate(bpe_tokens, start=1))
j, bpe_tok = next(bpe_toks)
for other_tok in other_tokens:
bpe_indices = []
while True:
if other_tok.startswith(bpe_tok):
bpe_indices.append(j)
other_tok = other_tok[len(bpe_tok) :]
try:
j, bpe_tok = next(bpe_toks)
except StopIteration:
j, bpe_tok = None, None
elif bpe_tok.startswith(other_tok):
# other_tok spans multiple BPE tokens
bpe_indices.append(j)
bpe_tok = bpe_tok[len(other_tok) :]
other_tok = ""
else:
raise Exception('Cannot align "{}" and "{}"'.format(other_tok, bpe_tok))
if other_tok == "":
break
assert len(bpe_indices) > 0
alignment.append(bpe_indices)
assert len(alignment) == len(other_tokens)
return alignment
def align_features_to_words(roberta, features, alignment):
"""
Align given features to words.
Args:
roberta (RobertaHubInterface): RoBERTa instance
features (torch.Tensor): features to align of shape `(T_bpe x C)`
alignment: alignment between BPE tokens and words returned by
func:`align_bpe_to_words`.
"""
assert features.dim() == 2
bpe_counts = Counter(j for bpe_indices in alignment for j in bpe_indices)
assert bpe_counts[0] == 0 # <s> shouldn't be aligned
denom = features.new([bpe_counts.get(j, 1) for j in range(len(features))])
weighted_features = features / denom.unsqueeze(-1)
output = [weighted_features[0]]
largest_j = -1
for bpe_indices in alignment:
output.append(weighted_features[bpe_indices].sum(dim=0))
largest_j = max(largest_j, *bpe_indices)
for j in range(largest_j + 1, len(features)):
output.append(weighted_features[j])
output = torch.stack(output)
assert torch.all(torch.abs(output.sum(dim=0) - features.sum(dim=0)) < 1e-4)
return output
def spacy_nlp():
if getattr(spacy_nlp, "_nlp", None) is None:
try:
from spacy.lang.en import English
spacy_nlp._nlp = English()
except ImportError:
raise ImportError("Please install spacy with: pip install spacy")
return spacy_nlp._nlp
def spacy_tokenizer():
if getattr(spacy_tokenizer, "_tokenizer", None) is None:
try:
nlp = spacy_nlp()
spacy_tokenizer._tokenizer = nlp.Defaults.create_tokenizer(nlp)
except ImportError:
raise ImportError("Please install spacy with: pip install spacy")
return spacy_tokenizer._tokenizer
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/alignment_utils.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .hub_interface import * # noqa
from .model import * # noqa
from .enc_dec import * # noqa
from .model_camembert import * # noqa
from .model_gottbert import * # noqa
from .model_xlmr import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
RoBERTa: A Robustly Optimized BERT Pretraining Approach.
"""
import logging
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from fairseq.models import (
FairseqEncoder,
FairseqEncoderModel,
register_model,
register_model_architecture,
)
from fairseq.models.transformer import DEFAULT_MIN_PARAMS_TO_WRAP, TransformerEncoder
from fairseq.modules import LayerNorm
from fairseq.modules.quant_noise import quant_noise as apply_quant_noise_
from fairseq.modules.transformer_sentence_encoder import init_bert_params
from fairseq.utils import safe_getattr, safe_hasattr
from .hub_interface import RobertaHubInterface
logger = logging.getLogger(__name__)
@register_model("roberta")
class RobertaModel(FairseqEncoderModel):
@classmethod
def hub_models(cls):
return {
"roberta.base": "http://dl.fbaipublicfiles.com/fairseq/models/roberta.base.tar.gz",
"roberta.large": "http://dl.fbaipublicfiles.com/fairseq/models/roberta.large.tar.gz",
"roberta.large.mnli": "http://dl.fbaipublicfiles.com/fairseq/models/roberta.large.mnli.tar.gz",
"roberta.large.wsc": "http://dl.fbaipublicfiles.com/fairseq/models/roberta.large.wsc.tar.gz",
}
def __init__(self, args, encoder):
super().__init__(encoder)
self.args = args
# We follow BERT's random weight initialization
self.apply(init_bert_params)
self.classification_heads = nn.ModuleDict()
@staticmethod
def add_args(parser):
"""Add model-specific arguments to the parser."""
parser.add_argument(
"--encoder-layers", type=int, metavar="L", help="num encoder layers"
)
parser.add_argument(
"--encoder-embed-dim",
type=int,
metavar="H",
help="encoder embedding dimension",
)
parser.add_argument(
"--encoder-ffn-embed-dim",
type=int,
metavar="F",
help="encoder embedding dimension for FFN",
)
parser.add_argument(
"--encoder-attention-heads",
type=int,
metavar="A",
help="num encoder attention heads",
)
parser.add_argument(
"--activation-fn",
choices=utils.get_available_activation_fns(),
help="activation function to use",
)
parser.add_argument(
"--pooler-activation-fn",
choices=utils.get_available_activation_fns(),
help="activation function to use for pooler layer",
)
parser.add_argument(
"--encoder-normalize-before",
action="store_true",
help="apply layernorm before each encoder block",
)
parser.add_argument(
"--layernorm-embedding",
action="store_true",
help="add layernorm to embedding",
)
parser.add_argument(
"--dropout", type=float, metavar="D", help="dropout probability"
)
parser.add_argument(
"--attention-dropout",
type=float,
metavar="D",
help="dropout probability for attention weights",
)
parser.add_argument(
"--activation-dropout",
type=float,
metavar="D",
help="dropout probability after activation in FFN",
)
parser.add_argument(
"--pooler-dropout",
type=float,
metavar="D",
help="dropout probability in the masked_lm pooler layers",
)
parser.add_argument(
"--max-positions", type=int, help="number of positional embeddings to learn"
)
parser.add_argument(
"--load-checkpoint-heads",
action="store_true",
help="(re-)register and load heads when loading checkpoints",
)
parser.add_argument(
"--untie-weights-roberta",
action="store_true",
help="Untie weights between embeddings and classifiers in RoBERTa",
)
# args for "Reducing Transformer Depth on Demand with Structured Dropout" (Fan et al., 2019)
parser.add_argument(
"--encoder-layerdrop",
type=float,
metavar="D",
default=0,
help="LayerDrop probability for encoder",
)
parser.add_argument(
"--encoder-layers-to-keep",
default=None,
help="which layers to *keep* when pruning as a comma-separated list",
)
# args for Training with Quantization Noise for Extreme Model Compression ({Fan*, Stock*} et al., 2020)
parser.add_argument(
"--quant-noise-pq",
type=float,
metavar="D",
default=0,
help="iterative PQ quantization noise at training time",
)
parser.add_argument(
"--quant-noise-pq-block-size",
type=int,
metavar="D",
default=8,
help="block size of quantization noise at training time",
)
parser.add_argument(
"--quant-noise-scalar",
type=float,
metavar="D",
default=0,
help="scalar quantization noise and scalar quantization at training time",
)
# args for "Better Fine-Tuning by Reducing Representational Collapse" (Aghajanyan et al. 2020)
parser.add_argument(
"--spectral-norm-classification-head",
action="store_true",
default=False,
help="Apply spectral normalization on the classification head",
)
# args for Fully Sharded Data Parallel (FSDP) training
parser.add_argument(
"--min-params-to-wrap",
type=int,
metavar="D",
default=DEFAULT_MIN_PARAMS_TO_WRAP,
help=(
"minimum number of params for a layer to be wrapped with FSDP() when "
"training with --ddp-backend=fully_sharded. Smaller values will "
"improve memory efficiency, but may make torch.distributed "
"communication less efficient due to smaller input sizes. This option "
"is set to 0 (i.e., always wrap) when --checkpoint-activations or "
"--offload-activations are passed."
),
)
# args for AdaPruning
# In short, it adds regularizarion for the multihead attention module and feed forward neural nets
# For more details, please refer to the paper https://openreview.net/forum?id=_CMSV7FTzGI
parser.add_argument(
"--mha-reg-scale-factor",
type=float,
metavar="D",
default=0.0,
help="scaling factor for regularization term in adptive pruning, recommendation is 0.000375",
)
parser.add_argument(
"--ffn-reg-scale-factor",
type=float,
metavar="D",
default=0.0,
help="scaling factor for regularization term in adptive pruning, recommendation is 0.000375",
)
parser.add_argument(
"--mha-heads-to-keep",
type=int,
metavar="D",
default=-1,
help="number of heads to keep in each multi-head attention module, -1 means keeping all heads",
)
parser.add_argument(
"--ffn-blocks-to-remove",
type=int,
metavar="D",
default=-1,
help="number of feedforward blocks to remove in each transformer layer, -1 means keeping all ffn blocks",
)
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
from omegaconf import OmegaConf
if OmegaConf.is_config(args):
OmegaConf.set_struct(args, False)
# make sure all arguments are present
base_architecture(args)
if not safe_hasattr(args, "max_positions"):
if not safe_hasattr(args, "tokens_per_sample"):
args.tokens_per_sample = task.max_positions()
args.max_positions = args.tokens_per_sample
encoder = RobertaEncoder(args, task.source_dictionary)
if OmegaConf.is_config(args):
OmegaConf.set_struct(args, True)
return cls(args, encoder)
def forward(
self,
src_tokens,
features_only=False,
return_all_hiddens=False,
classification_head_name=None,
**kwargs,
):
if classification_head_name is not None:
features_only = True
x, extra = self.encoder(src_tokens, features_only, return_all_hiddens, **kwargs)
if classification_head_name is not None:
x = self.classification_heads[classification_head_name](x)
return x, extra
def _get_adaptive_head_loss(self):
norm_loss = 0
scaling = float(self.args.mha_reg_scale_factor)
for layer in self.encoder.sentence_encoder.layers:
norm_loss_layer = 0
for i in range(layer.self_attn.num_heads):
start_idx = i * layer.self_attn.head_dim
end_idx = (i + 1) * layer.self_attn.head_dim
norm_loss_layer += scaling * (
torch.sum(
torch.abs(
layer.self_attn.q_proj.weight[
start_idx:end_idx,
]
)
)
+ torch.sum(
torch.abs(layer.self_attn.q_proj.bias[start_idx:end_idx])
)
)
norm_loss_layer += scaling * (
torch.sum(
torch.abs(
layer.self_attn.k_proj.weight[
start_idx:end_idx,
]
)
)
+ torch.sum(
torch.abs(layer.self_attn.k_proj.bias[start_idx:end_idx])
)
)
norm_loss_layer += scaling * (
torch.sum(
torch.abs(
layer.self_attn.v_proj.weight[
start_idx:end_idx,
]
)
)
+ torch.sum(
torch.abs(layer.self_attn.v_proj.bias[start_idx:end_idx])
)
)
norm_loss += norm_loss_layer
return norm_loss
def _get_adaptive_ffn_loss(self):
ffn_scale_factor = float(self.args.ffn_reg_scale_factor)
filter_loss = 0
for layer in self.encoder.sentence_encoder.layers:
filter_loss += torch.sum(
torch.abs(layer.fc1.weight * ffn_scale_factor)
) + torch.sum(torch.abs(layer.fc2.weight * ffn_scale_factor))
filter_loss += torch.sum(
torch.abs(layer.fc1.bias * ffn_scale_factor)
) + torch.sum(torch.abs(layer.fc2.bias * ffn_scale_factor))
return filter_loss
def get_normalized_probs(self, net_output, log_probs, sample=None):
"""Get normalized probabilities (or log probs) from a net's output."""
logits = net_output[0].float()
if log_probs:
return F.log_softmax(logits, dim=-1)
else:
return F.softmax(logits, dim=-1)
def register_classification_head(
self, name, num_classes=None, inner_dim=None, **kwargs
):
"""Register a classification head."""
if name in self.classification_heads:
prev_num_classes = self.classification_heads[name].out_proj.out_features
prev_inner_dim = self.classification_heads[name].dense.out_features
if num_classes != prev_num_classes or inner_dim != prev_inner_dim:
logger.warning(
're-registering head "{}" with num_classes {} (prev: {}) '
"and inner_dim {} (prev: {})".format(
name, num_classes, prev_num_classes, inner_dim, prev_inner_dim
)
)
self.classification_heads[name] = RobertaClassificationHead(
input_dim=self.args.encoder_embed_dim,
inner_dim=inner_dim or self.args.encoder_embed_dim,
num_classes=num_classes,
activation_fn=self.args.pooler_activation_fn,
pooler_dropout=self.args.pooler_dropout,
q_noise=self.args.quant_noise_pq,
qn_block_size=self.args.quant_noise_pq_block_size,
do_spectral_norm=self.args.spectral_norm_classification_head,
)
@property
def supported_targets(self):
return {"self"}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
bpe="gpt2",
**kwargs,
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
bpe=bpe,
load_checkpoint_heads=True,
**kwargs,
)
logger.info(x["args"])
return RobertaHubInterface(x["args"], x["task"], x["models"][0])
def upgrade_state_dict_named(self, state_dict, name):
prefix = name + "." if name != "" else ""
# rename decoder -> encoder before upgrading children modules
for k in list(state_dict.keys()):
if k.startswith(prefix + "decoder"):
new_k = prefix + "encoder" + k[len(prefix + "decoder") :]
state_dict[new_k] = state_dict[k]
del state_dict[k]
# rename emb_layer_norm -> layernorm_embedding
for k in list(state_dict.keys()):
if ".emb_layer_norm." in k:
new_k = k.replace(".emb_layer_norm.", ".layernorm_embedding.")
state_dict[new_k] = state_dict[k]
del state_dict[k]
# upgrade children modules
super().upgrade_state_dict_named(state_dict, name)
# Handle new classification heads present in the state dict.
current_head_names = (
[]
if not hasattr(self, "classification_heads")
else self.classification_heads.keys()
)
keys_to_delete = []
for k in state_dict.keys():
if not k.startswith(prefix + "classification_heads."):
continue
head_name = k[len(prefix + "classification_heads.") :].split(".")[0]
num_classes = state_dict[
prefix + "classification_heads." + head_name + ".out_proj.weight"
].size(0)
inner_dim = state_dict[
prefix + "classification_heads." + head_name + ".dense.weight"
].size(0)
if getattr(self.args, "load_checkpoint_heads", False):
if head_name not in current_head_names:
self.register_classification_head(head_name, num_classes, inner_dim)
else:
if head_name not in current_head_names:
logger.warning(
"deleting classification head ({}) from checkpoint "
"not present in current model: {}".format(head_name, k)
)
keys_to_delete.append(k)
elif (
num_classes
!= self.classification_heads[head_name].out_proj.out_features
or inner_dim
!= self.classification_heads[head_name].dense.out_features
):
logger.warning(
"deleting classification head ({}) from checkpoint "
"with different dimensions than current model: {}".format(
head_name, k
)
)
keys_to_delete.append(k)
for k in keys_to_delete:
del state_dict[k]
# Copy any newly-added classification heads into the state dict
# with their current weights.
if hasattr(self, "classification_heads"):
cur_state = self.classification_heads.state_dict()
for k, v in cur_state.items():
if prefix + "classification_heads." + k not in state_dict:
logger.info("Overwriting " + prefix + "classification_heads." + k)
state_dict[prefix + "classification_heads." + k] = v
class RobertaLMHead(nn.Module):
"""Head for masked language modeling."""
def __init__(self, embed_dim, output_dim, activation_fn, weight=None):
super().__init__()
self.dense = nn.Linear(embed_dim, embed_dim)
self.activation_fn = utils.get_activation_fn(activation_fn)
self.layer_norm = LayerNorm(embed_dim)
if weight is None:
weight = nn.Linear(embed_dim, output_dim, bias=False).weight
self.weight = weight
self.bias = nn.Parameter(torch.zeros(output_dim))
def forward(self, features, masked_tokens=None, **kwargs):
# Only project the masked tokens while training,
# saves both memory and computation
if masked_tokens is not None:
features = features[masked_tokens, :]
x = self.dense(features)
x = self.activation_fn(x)
x = self.layer_norm(x)
# project back to size of vocabulary with bias
x = F.linear(x, self.weight) + self.bias
return x
class RobertaClassificationHead(nn.Module):
"""Head for sentence-level classification tasks."""
def __init__(
self,
input_dim,
inner_dim,
num_classes,
activation_fn,
pooler_dropout,
q_noise=0,
qn_block_size=8,
do_spectral_norm=False,
):
super().__init__()
self.dense = nn.Linear(input_dim, inner_dim)
self.activation_fn = utils.get_activation_fn(activation_fn)
self.dropout = nn.Dropout(p=pooler_dropout)
self.out_proj = apply_quant_noise_(
nn.Linear(inner_dim, num_classes), q_noise, qn_block_size
)
if do_spectral_norm:
if q_noise != 0:
raise NotImplementedError(
"Attempting to use Spectral Normalization with Quant Noise. This is not officially supported"
)
self.out_proj = torch.nn.utils.spectral_norm(self.out_proj)
def forward(self, features, **kwargs):
x = features[:, 0, :] # take <s> token (equiv. to [CLS])
x = self.dropout(x)
x = self.dense(x)
x = self.activation_fn(x)
x = self.dropout(x)
x = self.out_proj(x)
return x
class RobertaEncoder(FairseqEncoder):
"""RoBERTa encoder."""
def __init__(self, args, dictionary):
super().__init__(dictionary)
# set any missing default values
base_architecture(args)
self.args = args
if args.encoder_layers_to_keep:
args.encoder_layers = len(args.encoder_layers_to_keep.split(","))
embed_tokens = self.build_embedding(
len(dictionary), args.encoder_embed_dim, dictionary.pad()
)
self.sentence_encoder = self.build_encoder(args, dictionary, embed_tokens)
self.lm_head = self.build_lm_head(
embed_dim=args.encoder_embed_dim,
output_dim=len(dictionary),
activation_fn=args.activation_fn,
weight=(
self.sentence_encoder.embed_tokens.weight
if not args.untie_weights_roberta
else None
),
)
def build_embedding(self, vocab_size, embedding_dim, padding_idx):
return nn.Embedding(vocab_size, embedding_dim, padding_idx)
def build_encoder(self, args, dictionary, embed_tokens):
encoder = TransformerEncoder(args, dictionary, embed_tokens)
encoder.apply(init_bert_params)
return encoder
def build_lm_head(self, embed_dim, output_dim, activation_fn, weight):
return RobertaLMHead(embed_dim, output_dim, activation_fn, weight)
def forward(
self,
src_tokens,
features_only=False,
return_all_hiddens=False,
masked_tokens=None,
**unused,
):
"""
Args:
src_tokens (LongTensor): input tokens of shape `(batch, src_len)`
features_only (bool, optional): skip LM head and just return
features. If True, the output will be of shape
`(batch, src_len, embed_dim)`.
return_all_hiddens (bool, optional): also return all of the
intermediate hidden states (default: False).
Returns:
tuple:
- the LM output of shape `(batch, src_len, vocab)`
- a dictionary of additional data, where 'inner_states'
is a list of hidden states. Note that the hidden
states have shape `(src_len, batch, vocab)`.
"""
x, extra = self.extract_features(
src_tokens, return_all_hiddens=return_all_hiddens
)
if not features_only:
x = self.output_layer(x, masked_tokens=masked_tokens)
return x, extra
def extract_features(self, src_tokens, return_all_hiddens=False, **kwargs):
encoder_out = self.sentence_encoder(
src_tokens,
return_all_hiddens=return_all_hiddens,
token_embeddings=kwargs.get("token_embeddings", None),
)
# T x B x C -> B x T x C
features = encoder_out["encoder_out"][0].transpose(0, 1)
inner_states = encoder_out["encoder_states"] if return_all_hiddens else None
return features, {"inner_states": inner_states}
def output_layer(self, features, masked_tokens=None, **unused):
return self.lm_head(features, masked_tokens)
def max_positions(self):
"""Maximum output length supported by the encoder."""
return self.args.max_positions
@register_model_architecture("roberta", "roberta")
def base_architecture(args):
args.encoder_layers = safe_getattr(args, "encoder_layers", 12)
args.encoder_embed_dim = safe_getattr(args, "encoder_embed_dim", 768)
args.encoder_ffn_embed_dim = safe_getattr(args, "encoder_ffn_embed_dim", 3072)
args.encoder_attention_heads = safe_getattr(args, "encoder_attention_heads", 12)
args.dropout = safe_getattr(args, "dropout", 0.1)
args.attention_dropout = safe_getattr(args, "attention_dropout", 0.1)
args.activation_dropout = safe_getattr(args, "activation_dropout", 0.0)
args.pooler_dropout = safe_getattr(args, "pooler_dropout", 0.0)
args.max_source_positions = safe_getattr(args, "max_positions", 512)
args.no_token_positional_embeddings = safe_getattr(
args, "no_token_positional_embeddings", False
)
# BERT has a few structural differences compared to the original Transformer
args.encoder_learned_pos = safe_getattr(args, "encoder_learned_pos", True)
args.layernorm_embedding = safe_getattr(args, "layernorm_embedding", True)
args.no_scale_embedding = safe_getattr(args, "no_scale_embedding", True)
args.activation_fn = safe_getattr(args, "activation_fn", "gelu")
args.encoder_normalize_before = safe_getattr(
args, "encoder_normalize_before", False
)
args.pooler_activation_fn = safe_getattr(args, "pooler_activation_fn", "tanh")
args.untie_weights_roberta = safe_getattr(args, "untie_weights_roberta", False)
# Adaptive input config
args.adaptive_input = safe_getattr(args, "adaptive_input", False)
# LayerDrop config
args.encoder_layerdrop = safe_getattr(args, "encoder_layerdrop", 0.0)
args.encoder_layers_to_keep = safe_getattr(args, "encoder_layers_to_keep", None)
# Quantization noise config
args.quant_noise_pq = safe_getattr(args, "quant_noise_pq", 0)
args.quant_noise_pq_block_size = safe_getattr(args, "quant_noise_pq_block_size", 8)
args.quant_noise_scalar = safe_getattr(args, "quant_noise_scalar", 0)
# R4F config
args.spectral_norm_classification_head = safe_getattr(
args, "spectral_norm_classification_head", False
)
@register_model_architecture("roberta", "roberta_prenorm")
def roberta_prenorm_architecture(args):
args.layernorm_embedding = safe_getattr(args, "layernorm_embedding", False)
args.encoder_normalize_before = safe_getattr(args, "encoder_normalize_before", True)
base_architecture(args)
@register_model_architecture("roberta", "roberta_base")
def roberta_base_architecture(args):
base_architecture(args)
@register_model_architecture("roberta", "roberta_large")
def roberta_large_architecture(args):
args.encoder_layers = safe_getattr(args, "encoder_layers", 24)
args.encoder_embed_dim = safe_getattr(args, "encoder_embed_dim", 1024)
args.encoder_ffn_embed_dim = safe_getattr(args, "encoder_ffn_embed_dim", 4096)
args.encoder_attention_heads = safe_getattr(args, "encoder_attention_heads", 16)
base_architecture(args)
@register_model_architecture("roberta", "xlm")
def xlm_architecture(args):
args.encoder_layers = safe_getattr(args, "encoder_layers", 16)
args.encoder_embed_dim = safe_getattr(args, "encoder_embed_dim", 1280)
args.encoder_ffn_embed_dim = safe_getattr(args, "encoder_ffn_embed_dim", 1280 * 4)
args.encoder_attention_heads = safe_getattr(args, "encoder_attention_heads", 16)
base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/model.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
CamemBERT: a Tasty French Language Model
"""
from fairseq.models import register_model
from .hub_interface import RobertaHubInterface
from .model import RobertaModel
@register_model("camembert")
class CamembertModel(RobertaModel):
@classmethod
def hub_models(cls):
return {
"camembert": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base.tar.gz",
"camembert.v0": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base.tar.gz",
"camembert-base": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base.tar.gz",
"camembert-large": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-large.tar.gz",
"camembert-base-ccnet": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base-ccnet.tar.gz",
"camembert-base-ccnet-4gb": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base-ccnet-4gb.tar.gz",
"camembert-base-wikipedia-4gb": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base-wikipedia-4gb.tar.gz",
"camembert-base-oscar-4gb": "http://dl.fbaipublicfiles.com/fairseq/models/camembert-base-oscar-4gb.tar.gz",
}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
bpe="sentencepiece",
**kwargs
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
bpe=bpe,
load_checkpoint_heads=True,
**kwargs,
)
return RobertaHubInterface(x["args"], x["task"], x["models"][0])
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/model_camembert.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import numpy as np
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from fairseq.data import encoders
class RobertaHubInterface(nn.Module):
"""A simple PyTorch Hub interface to RoBERTa.
Usage: https://github.com/pytorch/fairseq/tree/main/examples/roberta
"""
def __init__(self, cfg, task, model):
super().__init__()
self.cfg = cfg
self.task = task
self.model = model
self.bpe = encoders.build_bpe(cfg.bpe)
# this is useful for determining the device
self.register_buffer("_float_tensor", torch.tensor([0], dtype=torch.float))
@property
def device(self):
return self._float_tensor.device
def encode(
self, sentence: str, *addl_sentences, no_separator=False
) -> torch.LongTensor:
"""
BPE-encode a sentence (or multiple sentences).
Every sequence begins with a beginning-of-sentence (`<s>`) symbol.
Every sentence ends with an end-of-sentence (`</s>`) and we use an
extra end-of-sentence (`</s>`) as a separator.
Example (single sentence): `<s> a b c </s>`
Example (sentence pair): `<s> d e f </s> </s> 1 2 3 </s>`
The BPE encoding follows GPT-2. One subtle detail is that the GPT-2 BPE
requires leading spaces. For example::
>>> roberta.encode('Hello world').tolist()
[0, 31414, 232, 2]
>>> roberta.encode(' world').tolist()
[0, 232, 2]
>>> roberta.encode('world').tolist()
[0, 8331, 2]
"""
bpe_sentence = "<s> " + self.bpe.encode(sentence) + " </s>"
for s in addl_sentences:
bpe_sentence += " </s>" if not no_separator else ""
bpe_sentence += " " + self.bpe.encode(s) + " </s>"
tokens = self.task.source_dictionary.encode_line(
bpe_sentence, append_eos=False, add_if_not_exist=False
)
return tokens.long()
def decode(self, tokens: torch.LongTensor):
assert tokens.dim() == 1
tokens = tokens.numpy()
if tokens[0] == self.task.source_dictionary.bos():
tokens = tokens[1:] # remove <s>
eos_mask = tokens == self.task.source_dictionary.eos()
doc_mask = eos_mask[1:] & eos_mask[:-1]
sentences = np.split(tokens, doc_mask.nonzero()[0] + 1)
sentences = [
self.bpe.decode(self.task.source_dictionary.string(s)) for s in sentences
]
if len(sentences) == 1:
return sentences[0]
return sentences
def extract_features(
self, tokens: torch.LongTensor, return_all_hiddens: bool = False
) -> torch.Tensor:
if tokens.dim() == 1:
tokens = tokens.unsqueeze(0)
if tokens.size(-1) > self.model.max_positions():
raise ValueError(
"tokens exceeds maximum length: {} > {}".format(
tokens.size(-1), self.model.max_positions()
)
)
features, extra = self.model(
tokens.to(device=self.device),
features_only=True,
return_all_hiddens=return_all_hiddens,
)
if return_all_hiddens:
# convert from T x B x C -> B x T x C
inner_states = extra["inner_states"]
return [inner_state.transpose(0, 1) for inner_state in inner_states]
else:
return features # just the last layer's features
def register_classification_head(
self, name: str, num_classes: int = None, embedding_size: int = None, **kwargs
):
self.model.register_classification_head(
name, num_classes=num_classes, embedding_size=embedding_size, **kwargs
)
def predict(self, head: str, tokens: torch.LongTensor, return_logits: bool = False):
features = self.extract_features(tokens.to(device=self.device))
logits = self.model.classification_heads[head](features)
if return_logits:
return logits
return F.log_softmax(logits, dim=-1)
def extract_features_aligned_to_words(
self, sentence: str, return_all_hiddens: bool = False
) -> torch.Tensor:
"""Extract RoBERTa features, aligned to spaCy's word-level tokenizer."""
from fairseq.models.roberta import alignment_utils
from spacy.tokens import Doc
nlp = alignment_utils.spacy_nlp()
tokenizer = alignment_utils.spacy_tokenizer()
# tokenize both with GPT-2 BPE and spaCy
bpe_toks = self.encode(sentence)
spacy_toks = tokenizer(sentence)
spacy_toks_ws = [t.text_with_ws for t in tokenizer(sentence)]
alignment = alignment_utils.align_bpe_to_words(self, bpe_toks, spacy_toks_ws)
# extract features and align them
features = self.extract_features(
bpe_toks, return_all_hiddens=return_all_hiddens
)
features = features.squeeze(0)
aligned_feats = alignment_utils.align_features_to_words(
self, features, alignment
)
# wrap in spaCy Doc
doc = Doc(
nlp.vocab,
words=["<s>"] + [x.text for x in spacy_toks] + ["</s>"],
spaces=[True]
+ [x.endswith(" ") for x in spacy_toks_ws[:-1]]
+ [True, False],
)
assert len(doc) == aligned_feats.size(0)
doc.user_token_hooks["vector"] = lambda token: aligned_feats[token.i]
return doc
def fill_mask(self, masked_input: str, topk: int = 5):
masked_token = "<mask>"
assert (
masked_token in masked_input and masked_input.count(masked_token) == 1
), "Please add one {0} token for the input, eg: 'He is a {0} guy'".format(
masked_token
)
text_spans = masked_input.split(masked_token)
text_spans_bpe = (
(" {0} ".format(masked_token))
.join([self.bpe.encode(text_span.rstrip()) for text_span in text_spans])
.strip()
)
tokens = self.task.source_dictionary.encode_line(
"<s> " + text_spans_bpe + " </s>",
append_eos=False,
add_if_not_exist=False,
)
masked_index = (tokens == self.task.mask_idx).nonzero(as_tuple=False)
if tokens.dim() == 1:
tokens = tokens.unsqueeze(0)
with utils.model_eval(self.model):
features, extra = self.model(
tokens.long().to(device=self.device),
features_only=False,
return_all_hiddens=False,
)
logits = features[0, masked_index, :].squeeze()
prob = logits.softmax(dim=0)
values, index = prob.topk(k=topk, dim=0)
topk_predicted_token_bpe = self.task.source_dictionary.string(index)
topk_filled_outputs = []
for index, predicted_token_bpe in enumerate(
topk_predicted_token_bpe.split(" ")
):
predicted_token = self.bpe.decode(predicted_token_bpe)
# Quick hack to fix https://github.com/pytorch/fairseq/issues/1306
if predicted_token_bpe.startswith("\u2581"):
predicted_token = " " + predicted_token
if " {0}".format(masked_token) in masked_input:
topk_filled_outputs.append(
(
masked_input.replace(
" {0}".format(masked_token), predicted_token
),
values[index].item(),
predicted_token,
)
)
else:
topk_filled_outputs.append(
(
masked_input.replace(masked_token, predicted_token),
values[index].item(),
predicted_token,
)
)
return topk_filled_outputs
def disambiguate_pronoun(self, sentence: str) -> bool:
"""
Usage::
>>> disambiguate_pronoun('The _trophy_ would not fit in the brown suitcase because [it] was too big.')
True
>>> disambiguate_pronoun('The trophy would not fit in the brown suitcase because [it] was too big.')
'The trophy'
"""
assert hasattr(
self.task, "disambiguate_pronoun"
), "roberta.disambiguate_pronoun() requires a model trained with the WSC task."
with utils.model_eval(self.model):
return self.task.disambiguate_pronoun(
self.model, sentence, use_cuda=self.device.type == "cuda"
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/roberta/hub_interface.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import importlib
import os
# automatically import any Python files in the models/huggingface/ directory
models_dir = os.path.dirname(__file__)
for file in os.listdir(models_dir):
path = os.path.join(models_dir, file)
if (
not file.startswith("_")
and not file.startswith(".")
and (file.endswith(".py") or os.path.isdir(path))
):
model_name = file[: file.find(".py")] if file.endswith(".py") else file
module = importlib.import_module("fairseq.models.huggingface." + model_name)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/huggingface/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from typing import Dict, List, Optional
import torch
from fairseq.models import (
FairseqIncrementalDecoder,
FairseqLanguageModel,
register_model,
register_model_architecture,
)
logger = logging.getLogger(__name__)
DEFAULT_MAX_TARGET_POSITIONS = 1024
@register_model("hf_gpt2")
class HuggingFaceGPT2LanguageModel(FairseqLanguageModel):
def __init__(self, decoder):
super().__init__(decoder)
@staticmethod
def add_args(parser):
"""Add model-specific arguments to the parser."""
# fmt: off
parser.add_argument('--embed-dim', type=int, metavar='N',
help='embedding dimension')
parser.add_argument('--num-attention-heads', type=int, metavar='N',
help='num attention heads')
parser.add_argument('--num-layers', type=int, metavar='N',
help='num layers')
parser.add_argument('--dropout', type=float, metavar='D',
help='dropout probability for all fully connected layers '
'in the embeddings, encoder, and pooler')
parser.add_argument('--attention-dropout', type=float, metavar='D',
help='dropout probability for attention weights')
# fmt: on
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
default_architecture(args)
return cls(HuggingFaceGPT2Decoder(args, task))
class HuggingFaceGPT2Decoder(FairseqIncrementalDecoder):
def __init__(self, args, task):
try:
from transformers import GPT2Config, GPT2LMHeadModel
except ImportError:
raise ImportError(
"\n\nPlease install huggingface/transformers with:"
"\n\n pip install transformers"
)
super().__init__(task.target_dictionary)
config = GPT2Config(
vocab_size=len(task.target_dictionary),
n_positions=args.max_target_positions + 1,
n_ctx=args.max_target_positions,
n_embd=args.embed_dim,
n_layer=args.num_layers,
n_head=args.num_attention_heads,
resid_pdrop=args.dropout,
embd_pdrop=args.dropout,
attn_pdrop=args.attention_dropout,
layer_norm_epsilon=1e-6,
)
self.model = GPT2LMHeadModel(config)
# set zero embedding for padding symbol
self.pad_idx = task.target_dictionary.pad()
self.model.transformer.wte.weight.data[self.pad_idx].zero_()
self.model.transformer.wpe.weight.data[0].zero_()
def forward(
self,
prev_output_tokens,
src_lengths=None,
incremental_state: Optional[Dict[str, List[torch.Tensor]]] = None,
encoder_out=None,
):
features = self.extract_features(prev_output_tokens, incremental_state)
lm_logits = self.model.lm_head(features)
return (lm_logits,)
def extract_features(
self,
prev_output_tokens,
incremental_state: Optional[Dict[str, List[torch.Tensor]]] = None,
):
if incremental_state:
past = self.get_incremental_state("past")
else:
past = None
# don't attend to padding symbols
attention_mask = prev_output_tokens.ne(self.pad_idx).int()
# set position ids to exclude padding symbols
position_ids = attention_mask * (
torch.arange(1, 1 + prev_output_tokens.size(1))
.to(prev_output_tokens)
.repeat(prev_output_tokens.size(0), 1)
)
outputs = self.model.transformer(
input_ids=prev_output_tokens,
past=past,
attention_mask=attention_mask,
position_ids=position_ids,
)
last_hidden_states = outputs[0]
if incremental_state:
self.set_incremental_state(incremental_state, "past", outputs[1])
return last_hidden_states
def max_positions(self):
return self.model.config.n_positions - 1
@register_model_architecture("hf_gpt2", "hf_gpt2")
def default_architecture(args):
if getattr(args, "max_target_positions", None) is None:
args.max_target_positions = getattr(
args, "tokens_per_sample", DEFAULT_MAX_TARGET_POSITIONS
)
args.embed_dim = getattr(args, "embed_dim", 768)
args.num_attention_heads = getattr(args, "num_attention_heads", 12)
args.num_layers = getattr(args, "num_layers", 12)
args.dropout = getattr(args, "dropout", 0.1)
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
@register_model_architecture("hf_gpt2", "hf_gpt2_medium")
def hf_gpt2_medium(args):
args.embed_dim = getattr(args, "embed_dim", 1024)
args.num_attention_heads = getattr(args, "num_attention_heads", 16)
args.num_layers = getattr(args, "num_layers", 24)
default_architecture(args)
@register_model_architecture("hf_gpt2", "hf_gpt2_large")
def hf_gpt2_large(args):
args.embed_dim = getattr(args, "embed_dim", 1280)
args.num_attention_heads = getattr(args, "num_attention_heads", 20)
args.num_layers = getattr(args, "num_layers", 36)
default_architecture(args)
@register_model_architecture("hf_gpt2", "hf_gpt2_xl")
def hf_gpt2_xl(args):
args.embed_dim = getattr(args, "embed_dim", 1600)
args.num_attention_heads = getattr(args, "num_attention_heads", 25)
args.num_layers = getattr(args, "num_layers", 48)
default_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/huggingface/hf_gpt2.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import json
from typing import Dict
import numpy as np
import torch
from torch import nn
import torch.nn.functional as F
from fairseq.data.audio.audio_utils import (
get_window,
get_fourier_basis,
get_mel_filters,
TTSSpectrogram,
)
from fairseq.data.audio.speech_to_text_dataset import S2TDataConfig
from fairseq.models.text_to_speech.codehifigan import CodeGenerator as CodeHiFiGANModel
from fairseq.models.text_to_speech.hifigan import Generator as HiFiGANModel
logger = logging.getLogger(__name__)
class PseudoInverseMelScale(torch.nn.Module):
def __init__(self, n_stft, n_mels, sample_rate, f_min, f_max) -> None:
super(PseudoInverseMelScale, self).__init__()
self.n_mels = n_mels
basis = get_mel_filters(sample_rate, (n_stft - 1) * 2, n_mels, f_min, f_max)
basis = torch.pinverse(basis) # F x F_mel
self.register_buffer("basis", basis)
def forward(self, melspec: torch.Tensor) -> torch.Tensor:
# pack batch
shape = melspec.shape # B_1 x ... x B_K x F_mel x T
n_mels, time = shape[-2], shape[-1]
melspec = melspec.view(-1, n_mels, time)
freq, _ = self.basis.size() # F x F_mel
assert self.n_mels == n_mels, (self.n_mels, n_mels)
specgram = self.basis.matmul(melspec).clamp(min=0)
# unpack batch
specgram = specgram.view(shape[:-2] + (freq, time))
return specgram
class GriffinLim(torch.nn.Module):
def __init__(
self,
n_fft: int,
win_length: int,
hop_length: int,
n_iter: int,
window_fn=torch.hann_window,
):
super(GriffinLim, self).__init__()
self.transform = TTSSpectrogram(
n_fft, win_length, hop_length, return_phase=True
)
basis = get_fourier_basis(n_fft)
basis = torch.pinverse(n_fft / hop_length * basis).T[:, None, :]
basis *= get_window(window_fn, n_fft, win_length)
self.register_buffer("basis", basis)
self.n_fft = n_fft
self.win_length = win_length
self.hop_length = hop_length
self.n_iter = n_iter
self.tiny = 1.1754944e-38
@classmethod
def get_window_sum_square(
cls, n_frames, hop_length, win_length, n_fft, window_fn=torch.hann_window
) -> torch.Tensor:
w_sq = get_window(window_fn, n_fft, win_length) ** 2
n = n_fft + hop_length * (n_frames - 1)
x = torch.zeros(n, dtype=torch.float32)
for i in range(n_frames):
ofst = i * hop_length
x[ofst : min(n, ofst + n_fft)] += w_sq[: max(0, min(n_fft, n - ofst))]
return x
def inverse(self, magnitude: torch.Tensor, phase) -> torch.Tensor:
x = torch.cat(
[magnitude * torch.cos(phase), magnitude * torch.sin(phase)], dim=1
)
x = F.conv_transpose1d(x, self.basis, stride=self.hop_length)
win_sum_sq = self.get_window_sum_square(
magnitude.shape[-1],
hop_length=self.hop_length,
win_length=self.win_length,
n_fft=self.n_fft,
).to(magnitude.device)
# remove modulation effects
approx_nonzero_indices = win_sum_sq > self.tiny
x[:, :, approx_nonzero_indices] /= win_sum_sq[approx_nonzero_indices]
x *= self.n_fft / self.hop_length
x = x[:, :, self.n_fft // 2 :]
x = x[:, :, : -self.n_fft // 2 :]
return x
def forward(self, specgram: torch.Tensor) -> torch.Tensor:
angles = np.angle(np.exp(2j * np.pi * np.random.rand(*specgram.shape)))
angles = torch.from_numpy(angles).to(specgram)
_specgram = specgram.view(-1, specgram.shape[-2], specgram.shape[-1])
waveform = self.inverse(_specgram, angles).squeeze(1)
for _ in range(self.n_iter):
_, angles = self.transform(waveform)
waveform = self.inverse(_specgram, angles).squeeze(1)
return waveform.squeeze(0)
class GriffinLimVocoder(nn.Module):
def __init__(
self,
sample_rate,
win_size,
hop_size,
n_fft,
n_mels,
f_min,
f_max,
window_fn,
spec_bwd_max_iter=32,
fp16=False,
):
super().__init__()
self.inv_mel_transform = PseudoInverseMelScale(
n_stft=n_fft // 2 + 1,
n_mels=n_mels,
sample_rate=sample_rate,
f_min=f_min,
f_max=f_max,
)
self.gl_transform = GriffinLim(
n_fft=n_fft,
win_length=win_size,
hop_length=hop_size,
window_fn=window_fn,
n_iter=spec_bwd_max_iter,
)
if fp16:
self.half()
self.inv_mel_transform.half()
self.gl_transform.half()
else:
self.float()
self.inv_mel_transform.float()
self.gl_transform.float()
def forward(self, x):
# x: (B x) T x D -> (B x) 1 x T
# NOTE: batched forward produces noisier waveform. recommend running
# one utterance at a time
self.eval()
x = x.exp().transpose(-1, -2)
x = self.inv_mel_transform(x)
x = self.gl_transform(x)
return x
@classmethod
def from_data_cfg(cls, args, data_cfg: S2TDataConfig):
feat_cfg = data_cfg.config["features"]
window_fn = getattr(torch, feat_cfg["window_fn"] + "_window")
return cls(
sample_rate=feat_cfg["sample_rate"],
win_size=int(feat_cfg["win_len_t"] * feat_cfg["sample_rate"]),
hop_size=int(feat_cfg["hop_len_t"] * feat_cfg["sample_rate"]),
n_fft=feat_cfg["n_fft"],
n_mels=feat_cfg["n_mels"],
f_min=feat_cfg["f_min"],
f_max=feat_cfg["f_max"],
window_fn=window_fn,
spec_bwd_max_iter=args.spec_bwd_max_iter,
fp16=args.fp16,
)
class HiFiGANVocoder(nn.Module):
def __init__(
self, checkpoint_path: str, model_cfg: Dict[str, str], fp16: bool = False
) -> None:
super().__init__()
self.model = HiFiGANModel(model_cfg)
state_dict = torch.load(checkpoint_path)
self.model.load_state_dict(state_dict["generator"])
if fp16:
self.model.half()
logger.info(f"loaded HiFiGAN checkpoint from {checkpoint_path}")
def forward(self, x: torch.Tensor) -> torch.Tensor:
# (B x) T x D -> (B x) 1 x T
model = self.model.eval()
if len(x.shape) == 2:
return model(x.unsqueeze(0).transpose(1, 2)).detach().squeeze(0)
else:
return model(x.transpose(-1, -2)).detach()
@classmethod
def from_data_cfg(cls, args, data_cfg: S2TDataConfig):
vocoder_cfg = data_cfg.vocoder
assert vocoder_cfg.get("type", "griffin_lim") == "hifigan"
with open(vocoder_cfg["config"]) as f:
model_cfg = json.load(f)
return cls(vocoder_cfg["checkpoint"], model_cfg, fp16=args.fp16)
class CodeHiFiGANVocoder(nn.Module):
def __init__(
self, checkpoint_path: str, model_cfg: Dict[str, str], fp16: bool = False
) -> None:
super().__init__()
self.model = CodeHiFiGANModel(model_cfg)
state_dict = torch.load(checkpoint_path)
self.model.load_state_dict(state_dict["generator"])
self.model.eval()
if fp16:
self.model.half()
self.model.remove_weight_norm()
logger.info(f"loaded CodeHiFiGAN checkpoint from {checkpoint_path}")
def forward(self, x: Dict[str, torch.Tensor], dur_prediction=False) -> torch.Tensor:
assert "code" in x
x["dur_prediction"] = dur_prediction
mask = x["code"] >= 0 # remove invalid code
x["code"] = x["code"][mask].unsqueeze(dim=0)
return self.model(**x).detach().squeeze()
@classmethod
def from_data_cfg(cls, args, data_cfg):
vocoder_cfg = data_cfg.vocoder
assert vocoder_cfg is not None, "vocoder not specified in the data config"
with open(vocoder_cfg["config"]) as f:
model_cfg = json.load(f)
return cls(vocoder_cfg["checkpoint"], model_cfg, fp16=args.fp16)
def get_vocoder(args, data_cfg: S2TDataConfig):
if args.vocoder == "griffin_lim":
return GriffinLimVocoder.from_data_cfg(args, data_cfg)
elif args.vocoder == "hifigan":
return HiFiGANVocoder.from_data_cfg(args, data_cfg)
elif args.vocoder == "code_hifigan":
return CodeHiFiGANVocoder.from_data_cfg(args, data_cfg)
else:
raise ValueError("Unknown vocoder")
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/vocoder.py
|
from argparse import Namespace
import torch
import torch.nn as nn
from fairseq.models.text_to_speech.fastspeech2 import VariancePredictor
from fairseq.models.text_to_speech.hifigan import Generator
class CodeGenerator(Generator):
def __init__(self, cfg):
super().__init__(cfg)
self.dict = nn.Embedding(cfg["num_embeddings"], cfg["embedding_dim"])
self.multispkr = cfg.get("multispkr", None)
self.embedder = cfg.get("embedder_params", None)
if self.multispkr and not self.embedder:
self.spkr = nn.Embedding(cfg.get("num_speakers", 200), cfg["embedding_dim"])
elif self.embedder:
self.spkr = nn.Linear(cfg.get("embedder_dim", 256), cfg["embedding_dim"])
self.dur_predictor = None
if cfg.get("dur_predictor_params", None):
self.dur_predictor = VariancePredictor(
Namespace(**cfg["dur_predictor_params"])
)
@staticmethod
def _upsample(signal, max_frames):
if signal.dim() == 3:
bsz, channels, cond_length = signal.size()
elif signal.dim() == 2:
signal = signal.unsqueeze(2)
bsz, channels, cond_length = signal.size()
else:
signal = signal.view(-1, 1, 1)
bsz, channels, cond_length = signal.size()
signal = signal.unsqueeze(3).repeat(1, 1, 1, max_frames // cond_length)
# pad zeros as needed (if signal's shape does not divide completely with max_frames)
reminder = (max_frames - signal.shape[2] * signal.shape[3]) // signal.shape[3]
if reminder > 0:
raise NotImplementedError(
"Padding condition signal - misalignment between condition features."
)
signal = signal.view(bsz, channels, max_frames)
return signal
def forward(self, **kwargs):
x = self.dict(kwargs["code"]).transpose(1, 2)
if self.dur_predictor and kwargs.get("dur_prediction", False):
assert x.size(0) == 1, "only support single sample"
log_dur_pred = self.dur_predictor(x.transpose(1, 2))
dur_out = torch.clamp(
torch.round((torch.exp(log_dur_pred) - 1)).long(), min=1
)
# B x C x T
x = torch.repeat_interleave(x, dur_out.view(-1), dim=2)
if self.multispkr:
assert (
"spkr" in kwargs
), 'require "spkr" input for multispeaker CodeHiFiGAN vocoder'
spkr = self.spkr(kwargs["spkr"]).transpose(1, 2)
spkr = self._upsample(spkr, x.shape[-1])
x = torch.cat([x, spkr], dim=1)
for k, feat in kwargs.items():
if k in ["spkr", "code", "dur_prediction"]:
continue
feat = self._upsample(feat, x.shape[-1])
x = torch.cat([x, feat], dim=1)
return super().forward(x)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/codehifigan.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import torch
from torch import nn
from torch.nn import functional as F
from fairseq.models import (
FairseqEncoder,
FairseqEncoderDecoderModel,
FairseqIncrementalDecoder,
register_model,
register_model_architecture,
)
from fairseq.modules import LSTMCellWithZoneOut, LocationAttention
logger = logging.getLogger(__name__)
def encoder_init(m):
if isinstance(m, nn.Conv1d):
nn.init.xavier_uniform_(m.weight, torch.nn.init.calculate_gain("relu"))
class Tacotron2Encoder(FairseqEncoder):
def __init__(self, args, src_dict, embed_speaker):
super().__init__(src_dict)
self.padding_idx = src_dict.pad()
self.embed_speaker = embed_speaker
self.spk_emb_proj = None
if embed_speaker is not None:
self.spk_emb_proj = nn.Linear(
args.encoder_embed_dim + args.speaker_embed_dim, args.encoder_embed_dim
)
self.embed_tokens = nn.Embedding(
len(src_dict), args.encoder_embed_dim, padding_idx=self.padding_idx
)
assert args.encoder_conv_kernel_size % 2 == 1
self.convolutions = nn.ModuleList(
nn.Sequential(
nn.Conv1d(
args.encoder_embed_dim,
args.encoder_embed_dim,
kernel_size=args.encoder_conv_kernel_size,
padding=((args.encoder_conv_kernel_size - 1) // 2),
),
nn.BatchNorm1d(args.encoder_embed_dim),
nn.ReLU(),
nn.Dropout(args.encoder_dropout),
)
for _ in range(args.encoder_conv_layers)
)
self.lstm = nn.LSTM(
args.encoder_embed_dim,
args.encoder_embed_dim // 2,
num_layers=args.encoder_lstm_layers,
batch_first=True,
bidirectional=True,
)
self.apply(encoder_init)
def forward(self, src_tokens, src_lengths=None, speaker=None, **kwargs):
x = self.embed_tokens(src_tokens)
x = x.transpose(1, 2).contiguous() # B x T x C -> B x C x T
for conv in self.convolutions:
x = conv(x)
x = x.transpose(1, 2).contiguous() # B x C x T -> B x T x C
src_lengths = src_lengths.cpu().long()
x = nn.utils.rnn.pack_padded_sequence(x, src_lengths, batch_first=True)
x = self.lstm(x)[0]
x = nn.utils.rnn.pad_packed_sequence(x, batch_first=True)[0]
encoder_padding_mask = src_tokens.eq(self.padding_idx)
if self.embed_speaker is not None:
seq_len, bsz, _ = x.size()
emb = self.embed_speaker(speaker).expand(seq_len, bsz, -1)
x = self.spk_emb_proj(torch.cat([x, emb], dim=2))
return {
"encoder_out": [x], # B x T x C
"encoder_padding_mask": encoder_padding_mask, # B x T
}
class Prenet(nn.Module):
def __init__(self, in_dim, n_layers, n_units, dropout):
super().__init__()
self.layers = nn.ModuleList(
nn.Sequential(nn.Linear(in_dim if i == 0 else n_units, n_units), nn.ReLU())
for i in range(n_layers)
)
self.dropout = dropout
def forward(self, x):
for layer in self.layers:
x = F.dropout(layer(x), p=self.dropout) # always applies dropout
return x
class Postnet(nn.Module):
def __init__(self, in_dim, n_channels, kernel_size, n_layers, dropout):
super(Postnet, self).__init__()
self.convolutions = nn.ModuleList()
assert kernel_size % 2 == 1
for i in range(n_layers):
cur_layers = (
[
nn.Conv1d(
in_dim if i == 0 else n_channels,
n_channels if i < n_layers - 1 else in_dim,
kernel_size=kernel_size,
padding=((kernel_size - 1) // 2),
),
nn.BatchNorm1d(n_channels if i < n_layers - 1 else in_dim),
]
+ ([nn.Tanh()] if i < n_layers - 1 else [])
+ [nn.Dropout(dropout)]
)
nn.init.xavier_uniform_(
cur_layers[0].weight,
torch.nn.init.calculate_gain("tanh" if i < n_layers - 1 else "linear"),
)
self.convolutions.append(nn.Sequential(*cur_layers))
def forward(self, x):
x = x.transpose(1, 2) # B x T x C -> B x C x T
for conv in self.convolutions:
x = conv(x)
return x.transpose(1, 2)
def decoder_init(m):
if isinstance(m, torch.nn.Conv1d):
nn.init.xavier_uniform_(m.weight, torch.nn.init.calculate_gain("tanh"))
class Tacotron2Decoder(FairseqIncrementalDecoder):
def __init__(self, args, src_dict):
super().__init__(None)
self.args = args
self.n_frames_per_step = args.n_frames_per_step
self.out_dim = args.output_frame_dim * args.n_frames_per_step
self.prenet = Prenet(
self.out_dim, args.prenet_layers, args.prenet_dim, args.prenet_dropout
)
# take prev_context, prev_frame, (speaker embedding) as input
self.attention_lstm = LSTMCellWithZoneOut(
args.zoneout,
args.prenet_dim + args.encoder_embed_dim,
args.decoder_lstm_dim,
)
# take attention_lstm output, attention_state, encoder_out as input
self.attention = LocationAttention(
args.attention_dim,
args.encoder_embed_dim,
args.decoder_lstm_dim,
(1 + int(args.attention_use_cumprob)),
args.attention_conv_dim,
args.attention_conv_kernel_size,
)
# take attention_lstm output, context, (gated_latent) as input
self.lstm = nn.ModuleList(
LSTMCellWithZoneOut(
args.zoneout,
args.encoder_embed_dim + args.decoder_lstm_dim,
args.decoder_lstm_dim,
)
for i in range(args.decoder_lstm_layers)
)
proj_in_dim = args.encoder_embed_dim + args.decoder_lstm_dim
self.feat_proj = nn.Linear(proj_in_dim, self.out_dim)
self.eos_proj = nn.Linear(proj_in_dim, 1)
self.postnet = Postnet(
self.out_dim,
args.postnet_conv_dim,
args.postnet_conv_kernel_size,
args.postnet_layers,
args.postnet_dropout,
)
self.ctc_proj = None
if getattr(args, "ctc_weight", 0.0) > 0.0:
self.ctc_proj = nn.Linear(self.out_dim, len(src_dict))
self.apply(decoder_init)
def _get_states(self, incremental_state, enc_out):
bsz, in_len, _ = enc_out.size()
alstm_h = self.get_incremental_state(incremental_state, "alstm_h")
if alstm_h is None:
alstm_h = enc_out.new_zeros(bsz, self.args.decoder_lstm_dim)
alstm_c = self.get_incremental_state(incremental_state, "alstm_c")
if alstm_c is None:
alstm_c = enc_out.new_zeros(bsz, self.args.decoder_lstm_dim)
lstm_h = self.get_incremental_state(incremental_state, "lstm_h")
if lstm_h is None:
lstm_h = [
enc_out.new_zeros(bsz, self.args.decoder_lstm_dim)
for _ in range(self.args.decoder_lstm_layers)
]
lstm_c = self.get_incremental_state(incremental_state, "lstm_c")
if lstm_c is None:
lstm_c = [
enc_out.new_zeros(bsz, self.args.decoder_lstm_dim)
for _ in range(self.args.decoder_lstm_layers)
]
attn_w = self.get_incremental_state(incremental_state, "attn_w")
if attn_w is None:
attn_w = enc_out.new_zeros(bsz, in_len)
attn_w_cum = self.get_incremental_state(incremental_state, "attn_w_cum")
if attn_w_cum is None:
attn_w_cum = enc_out.new_zeros(bsz, in_len)
return alstm_h, alstm_c, lstm_h, lstm_c, attn_w, attn_w_cum
def _get_init_attn_c(self, enc_out, enc_mask):
bsz = enc_out.size(0)
if self.args.init_attn_c == "zero":
return enc_out.new_zeros(bsz, self.args.encoder_embed_dim)
elif self.args.init_attn_c == "avg":
enc_w = (~enc_mask).type(enc_out.type())
enc_w = enc_w / enc_w.sum(dim=1, keepdim=True)
return torch.sum(enc_out * enc_w.unsqueeze(2), dim=1)
else:
raise ValueError(f"{self.args.init_attn_c} not supported")
def forward(
self,
prev_output_tokens,
encoder_out=None,
incremental_state=None,
target_lengths=None,
**kwargs,
):
enc_mask = encoder_out["encoder_padding_mask"]
enc_out = encoder_out["encoder_out"][0]
in_len = enc_out.size(1)
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:, :]
bsz, out_len, _ = prev_output_tokens.size()
prenet_out = self.prenet(prev_output_tokens)
(alstm_h, alstm_c, lstm_h, lstm_c, attn_w, attn_w_cum) = self._get_states(
incremental_state, enc_out
)
attn_ctx = self._get_init_attn_c(enc_out, enc_mask)
attn_out = enc_out.new_zeros(bsz, in_len, out_len)
feat_out = enc_out.new_zeros(bsz, out_len, self.out_dim)
eos_out = enc_out.new_zeros(bsz, out_len)
for t in range(out_len):
alstm_in = torch.cat((attn_ctx, prenet_out[:, t, :]), dim=1)
alstm_h, alstm_c = self.attention_lstm(alstm_in, (alstm_h, alstm_c))
attn_state = attn_w.unsqueeze(1)
if self.args.attention_use_cumprob:
attn_state = torch.stack((attn_w, attn_w_cum), dim=1)
attn_ctx, attn_w = self.attention(enc_out, enc_mask, alstm_h, attn_state)
attn_w_cum = attn_w_cum + attn_w
attn_out[:, :, t] = attn_w
for i, cur_lstm in enumerate(self.lstm):
if i == 0:
lstm_in = torch.cat((attn_ctx, alstm_h), dim=1)
else:
lstm_in = torch.cat((attn_ctx, lstm_h[i - 1]), dim=1)
lstm_h[i], lstm_c[i] = cur_lstm(lstm_in, (lstm_h[i], lstm_c[i]))
proj_in = torch.cat((attn_ctx, lstm_h[-1]), dim=1)
feat_out[:, t, :] = self.feat_proj(proj_in)
eos_out[:, t] = self.eos_proj(proj_in).squeeze(1)
self.attention.clear_cache()
self.set_incremental_state(incremental_state, "alstm_h", alstm_h)
self.set_incremental_state(incremental_state, "alstm_c", alstm_c)
self.set_incremental_state(incremental_state, "lstm_h", lstm_h)
self.set_incremental_state(incremental_state, "lstm_c", lstm_c)
self.set_incremental_state(incremental_state, "attn_w", attn_w)
self.set_incremental_state(incremental_state, "attn_w_cum", attn_w_cum)
post_feat_out = feat_out + self.postnet(feat_out)
eos_out = eos_out.view(bsz, out_len, 1)
return post_feat_out, eos_out, {"attn": attn_out, "feature_out": feat_out}
@register_model("tacotron_2")
class Tacotron2Model(FairseqEncoderDecoderModel):
"""
Implementation for https://arxiv.org/pdf/1712.05884.pdf
"""
@staticmethod
def add_args(parser):
# encoder
parser.add_argument("--encoder-dropout", type=float)
parser.add_argument("--encoder-embed-dim", type=int)
parser.add_argument("--encoder-conv-layers", type=int)
parser.add_argument("--encoder-conv-kernel-size", type=int)
parser.add_argument("--encoder-lstm-layers", type=int)
# decoder
parser.add_argument("--attention-dim", type=int)
parser.add_argument("--attention-conv-dim", type=int)
parser.add_argument("--attention-conv-kernel-size", type=int)
parser.add_argument("--prenet-dropout", type=float)
parser.add_argument("--prenet-layers", type=int)
parser.add_argument("--prenet-dim", type=int)
parser.add_argument("--postnet-dropout", type=float)
parser.add_argument("--postnet-layers", type=int)
parser.add_argument("--postnet-conv-dim", type=int)
parser.add_argument("--postnet-conv-kernel-size", type=int)
parser.add_argument("--init-attn-c", type=str)
parser.add_argument("--attention-use-cumprob", action="store_true")
parser.add_argument("--zoneout", type=float)
parser.add_argument("--decoder-lstm-layers", type=int)
parser.add_argument("--decoder-lstm-dim", type=int)
parser.add_argument("--output-frame-dim", type=int)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._num_updates = 0
@classmethod
def build_model(cls, args, task):
embed_speaker = task.get_speaker_embeddings(args)
encoder = Tacotron2Encoder(args, task.src_dict, embed_speaker)
decoder = Tacotron2Decoder(args, task.src_dict)
return cls(encoder, decoder)
def forward_encoder(self, src_tokens, src_lengths, **kwargs):
return self.encoder(src_tokens, src_lengths=src_lengths, **kwargs)
def set_num_updates(self, num_updates):
super().set_num_updates(num_updates)
self._num_updates = num_updates
@register_model_architecture("tacotron_2", "tacotron_2")
def base_architecture(args):
# encoder
args.encoder_dropout = getattr(args, "encoder_dropout", 0.5)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_conv_layers = getattr(args, "encoder_conv_layers", 3)
args.encoder_conv_kernel_size = getattr(args, "encoder_conv_kernel_size", 5)
args.encoder_lstm_layers = getattr(args, "encoder_lstm_layers", 1)
# decoder
args.attention_dim = getattr(args, "attention_dim", 128)
args.attention_conv_dim = getattr(args, "attention_conv_dim", 32)
args.attention_conv_kernel_size = getattr(args, "attention_conv_kernel_size", 15)
args.prenet_dropout = getattr(args, "prenet_dropout", 0.5)
args.prenet_layers = getattr(args, "prenet_layers", 2)
args.prenet_dim = getattr(args, "prenet_dim", 256)
args.postnet_dropout = getattr(args, "postnet_dropout", 0.5)
args.postnet_layers = getattr(args, "postnet_layers", 5)
args.postnet_conv_dim = getattr(args, "postnet_conv_dim", 512)
args.postnet_conv_kernel_size = getattr(args, "postnet_conv_kernel_size", 5)
args.init_attn_c = getattr(args, "init_attn_c", "zero")
args.attention_use_cumprob = getattr(args, "attention_use_cumprob", True)
args.zoneout = getattr(args, "zoneout", 0.1)
args.decoder_lstm_layers = getattr(args, "decoder_lstm_layers", 2)
args.decoder_lstm_dim = getattr(args, "decoder_lstm_dim", 1024)
args.output_frame_dim = getattr(args, "output_frame_dim", 80)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/tacotron2.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .tacotron2 import * # noqa
from .tts_transformer import * # noqa
from .fastspeech2 import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import torch
from torch import nn
from fairseq import utils
from fairseq.data.data_utils import lengths_to_padding_mask
from fairseq.models import (
FairseqEncoder,
FairseqEncoderModel,
register_model,
register_model_architecture,
)
from fairseq.models.text_to_speech.hub_interface import TTSHubInterface
from fairseq.models.text_to_speech.tacotron2 import Postnet
from fairseq.modules import (
FairseqDropout,
LayerNorm,
MultiheadAttention,
PositionalEmbedding,
)
logger = logging.getLogger(__name__)
def model_init(m):
if isinstance(m, nn.Conv1d):
nn.init.xavier_uniform_(m.weight, torch.nn.init.calculate_gain("relu"))
def Embedding(num_embeddings, embedding_dim, padding_idx=None):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
return m
class PositionwiseFeedForward(nn.Module):
def __init__(self, in_dim, hidden_dim, kernel_size, dropout):
super().__init__()
self.ffn = nn.Sequential(
nn.Conv1d(
in_dim,
hidden_dim,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
),
nn.ReLU(),
nn.Conv1d(
hidden_dim,
in_dim,
kernel_size=kernel_size,
padding=(kernel_size - 1) // 2,
),
)
self.layer_norm = LayerNorm(in_dim)
self.dropout = self.dropout_module = FairseqDropout(
p=dropout, module_name=self.__class__.__name__
)
def forward(self, x):
# B x T x C
residual = x
x = self.ffn(x.transpose(1, 2)).transpose(1, 2)
x = self.dropout(x)
return self.layer_norm(x + residual)
class FFTLayer(torch.nn.Module):
def __init__(
self, embed_dim, n_heads, hidden_dim, kernel_size, dropout, attention_dropout
):
super().__init__()
self.self_attn = MultiheadAttention(
embed_dim, n_heads, dropout=attention_dropout, self_attention=True
)
self.layer_norm = LayerNorm(embed_dim)
self.ffn = PositionwiseFeedForward(
embed_dim, hidden_dim, kernel_size, dropout=dropout
)
def forward(self, x, padding_mask=None):
# B x T x C
residual = x
x = x.transpose(0, 1)
x, _ = self.self_attn(
query=x, key=x, value=x, key_padding_mask=padding_mask, need_weights=False
)
x = x.transpose(0, 1)
x = self.layer_norm(x + residual)
return self.ffn(x)
class LengthRegulator(nn.Module):
def forward(self, x, durations):
# x: B x T x C
out_lens = durations.sum(dim=1)
max_len = out_lens.max()
bsz, seq_len, dim = x.size()
out = x.new_zeros((bsz, max_len, dim))
for b in range(bsz):
indices = []
for t in range(seq_len):
indices.extend([t] * utils.item(durations[b, t]))
indices = torch.tensor(indices, dtype=torch.long).to(x.device)
out_len = utils.item(out_lens[b])
out[b, :out_len] = x[b].index_select(0, indices)
return out, out_lens
class VariancePredictor(nn.Module):
def __init__(self, args):
super().__init__()
self.conv1 = nn.Sequential(
nn.Conv1d(
args.encoder_embed_dim,
args.var_pred_hidden_dim,
kernel_size=args.var_pred_kernel_size,
padding=(args.var_pred_kernel_size - 1) // 2,
),
nn.ReLU(),
)
self.ln1 = nn.LayerNorm(args.var_pred_hidden_dim)
self.dropout_module = FairseqDropout(
p=args.var_pred_dropout, module_name=self.__class__.__name__
)
self.conv2 = nn.Sequential(
nn.Conv1d(
args.var_pred_hidden_dim,
args.var_pred_hidden_dim,
kernel_size=args.var_pred_kernel_size,
padding=1,
),
nn.ReLU(),
)
self.ln2 = nn.LayerNorm(args.var_pred_hidden_dim)
self.proj = nn.Linear(args.var_pred_hidden_dim, 1)
def forward(self, x):
# Input: B x T x C; Output: B x T
x = self.conv1(x.transpose(1, 2)).transpose(1, 2)
x = self.dropout_module(self.ln1(x))
x = self.conv2(x.transpose(1, 2)).transpose(1, 2)
x = self.dropout_module(self.ln2(x))
return self.proj(x).squeeze(dim=2)
class VarianceAdaptor(nn.Module):
def __init__(self, args):
super().__init__()
self.args = args
self.length_regulator = LengthRegulator()
self.duration_predictor = VariancePredictor(args)
self.pitch_predictor = VariancePredictor(args)
self.energy_predictor = VariancePredictor(args)
n_bins, steps = self.args.var_pred_n_bins, self.args.var_pred_n_bins - 1
self.pitch_bins = torch.linspace(args.pitch_min, args.pitch_max, steps)
self.embed_pitch = Embedding(n_bins, args.encoder_embed_dim)
self.energy_bins = torch.linspace(args.energy_min, args.energy_max, steps)
self.embed_energy = Embedding(n_bins, args.encoder_embed_dim)
def get_pitch_emb(self, x, tgt=None, factor=1.0):
out = self.pitch_predictor(x)
bins = self.pitch_bins.to(x.device)
if tgt is None:
out = out * factor
emb = self.embed_pitch(torch.bucketize(out, bins))
else:
emb = self.embed_pitch(torch.bucketize(tgt, bins))
return out, emb
def get_energy_emb(self, x, tgt=None, factor=1.0):
out = self.energy_predictor(x)
bins = self.energy_bins.to(x.device)
if tgt is None:
out = out * factor
emb = self.embed_energy(torch.bucketize(out, bins))
else:
emb = self.embed_energy(torch.bucketize(tgt, bins))
return out, emb
def forward(
self,
x,
padding_mask,
durations=None,
pitches=None,
energies=None,
d_factor=1.0,
p_factor=1.0,
e_factor=1.0,
):
# x: B x T x C
log_dur_out = self.duration_predictor(x)
dur_out = torch.clamp(
torch.round((torch.exp(log_dur_out) - 1) * d_factor).long(), min=0
)
dur_out.masked_fill_(padding_mask, 0)
pitch_out, pitch_emb = self.get_pitch_emb(x, pitches, p_factor)
x = x + pitch_emb
energy_out, energy_emb = self.get_energy_emb(x, energies, e_factor)
x = x + energy_emb
x, out_lens = self.length_regulator(
x, dur_out if durations is None else durations
)
return x, out_lens, log_dur_out, pitch_out, energy_out
class FastSpeech2Encoder(FairseqEncoder):
def __init__(self, args, src_dict, embed_speaker):
super().__init__(src_dict)
self.args = args
self.padding_idx = src_dict.pad()
self.n_frames_per_step = args.n_frames_per_step
self.out_dim = args.output_frame_dim * args.n_frames_per_step
self.embed_speaker = embed_speaker
self.spk_emb_proj = None
if embed_speaker is not None:
self.spk_emb_proj = nn.Linear(
args.encoder_embed_dim + args.speaker_embed_dim, args.encoder_embed_dim
)
self.dropout_module = FairseqDropout(
p=args.dropout, module_name=self.__class__.__name__
)
self.embed_tokens = Embedding(
len(src_dict), args.encoder_embed_dim, padding_idx=self.padding_idx
)
self.embed_positions = PositionalEmbedding(
args.max_source_positions, args.encoder_embed_dim, self.padding_idx
)
self.pos_emb_alpha = nn.Parameter(torch.ones(1))
self.dec_pos_emb_alpha = nn.Parameter(torch.ones(1))
self.encoder_fft_layers = nn.ModuleList(
FFTLayer(
args.encoder_embed_dim,
args.encoder_attention_heads,
args.fft_hidden_dim,
args.fft_kernel_size,
dropout=args.dropout,
attention_dropout=args.attention_dropout,
)
for _ in range(args.encoder_layers)
)
self.var_adaptor = VarianceAdaptor(args)
self.decoder_fft_layers = nn.ModuleList(
FFTLayer(
args.decoder_embed_dim,
args.decoder_attention_heads,
args.fft_hidden_dim,
args.fft_kernel_size,
dropout=args.dropout,
attention_dropout=args.attention_dropout,
)
for _ in range(args.decoder_layers)
)
self.out_proj = nn.Linear(args.decoder_embed_dim, self.out_dim)
self.postnet = None
if args.add_postnet:
self.postnet = Postnet(
self.out_dim,
args.postnet_conv_dim,
args.postnet_conv_kernel_size,
args.postnet_layers,
args.postnet_dropout,
)
self.apply(model_init)
def forward(
self,
src_tokens,
src_lengths=None,
speaker=None,
durations=None,
pitches=None,
energies=None,
**kwargs,
):
x = self.embed_tokens(src_tokens)
enc_padding_mask = src_tokens.eq(self.padding_idx)
x += self.pos_emb_alpha * self.embed_positions(enc_padding_mask)
x = self.dropout_module(x)
for layer in self.encoder_fft_layers:
x = layer(x, enc_padding_mask)
if self.embed_speaker is not None:
bsz, seq_len, _ = x.size()
emb = self.embed_speaker(speaker).expand(bsz, seq_len, -1)
x = self.spk_emb_proj(torch.cat([x, emb], dim=2))
x, out_lens, log_dur_out, pitch_out, energy_out = self.var_adaptor(
x, enc_padding_mask, durations, pitches, energies
)
dec_padding_mask = lengths_to_padding_mask(out_lens)
x += self.dec_pos_emb_alpha * self.embed_positions(dec_padding_mask)
for layer in self.decoder_fft_layers:
x = layer(x, dec_padding_mask)
x = self.out_proj(x)
x_post = None
if self.postnet is not None:
x_post = x + self.postnet(x)
return x, x_post, out_lens, log_dur_out, pitch_out, energy_out
@register_model("fastspeech2")
class FastSpeech2Model(FairseqEncoderModel):
"""
Implementation for https://arxiv.org/abs/2006.04558
"""
NON_AUTOREGRESSIVE = True
@classmethod
def hub_models(cls):
base_url = "http://dl.fbaipublicfiles.com/fairseq/s2"
model_ids = [
"fastspeech2-en-ljspeech",
"fastspeech2-en-200_speaker-cv4",
]
return {i: f"{base_url}/{i}.tar.gz" for i in model_ids}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
config_yaml="config.yaml",
vocoder: str = "griffin_lim",
fp16: bool = False,
**kwargs,
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
config_yaml=config_yaml,
vocoder=vocoder,
fp16=fp16,
**kwargs,
)
return TTSHubInterface(x["args"], x["task"], x["models"][0])
@staticmethod
def add_args(parser):
parser.add_argument("--dropout", type=float)
parser.add_argument("--output-frame-dim", type=int)
parser.add_argument("--speaker-embed-dim", type=int)
# FFT blocks
parser.add_argument("--fft-hidden-dim", type=int)
parser.add_argument("--fft-kernel-size", type=int)
parser.add_argument("--attention-dropout", type=float)
parser.add_argument("--encoder-layers", type=int)
parser.add_argument("--encoder-embed-dim", type=int)
parser.add_argument("--encoder-attention-heads", type=int)
parser.add_argument("--decoder-layers", type=int)
parser.add_argument("--decoder-embed-dim", type=int)
parser.add_argument("--decoder-attention-heads", type=int)
# variance predictor
parser.add_argument("--var-pred-n-bins", type=int)
parser.add_argument("--var-pred-hidden-dim", type=int)
parser.add_argument("--var-pred-kernel-size", type=int)
parser.add_argument("--var-pred-dropout", type=float)
# postnet
parser.add_argument("--add-postnet", action="store_true")
parser.add_argument("--postnet-dropout", type=float)
parser.add_argument("--postnet-layers", type=int)
parser.add_argument("--postnet-conv-dim", type=int)
parser.add_argument("--postnet-conv-kernel-size", type=int)
def __init__(self, encoder, args, src_dict):
super().__init__(encoder)
self._num_updates = 0
out_dim = args.output_frame_dim * args.n_frames_per_step
self.ctc_proj = None
if getattr(args, "ctc_weight", 0.0) > 0.0:
self.ctc_proj = nn.Linear(out_dim, len(src_dict))
@classmethod
def build_model(cls, args, task):
embed_speaker = task.get_speaker_embeddings(args)
encoder = FastSpeech2Encoder(args, task.src_dict, embed_speaker)
return cls(encoder, args, task.src_dict)
def set_num_updates(self, num_updates):
super().set_num_updates(num_updates)
self._num_updates = num_updates
def get_normalized_probs(self, net_output, log_probs, sample=None):
logits = self.ctc_proj(net_output[0])
if log_probs:
return utils.log_softmax(logits.float(), dim=-1)
else:
return utils.softmax(logits.float(), dim=-1)
@register_model_architecture("fastspeech2", "fastspeech2")
def base_architecture(args):
args.dropout = getattr(args, "dropout", 0.2)
args.output_frame_dim = getattr(args, "output_frame_dim", 80)
args.speaker_embed_dim = getattr(args, "speaker_embed_dim", 64)
# FFT blocks
args.fft_hidden_dim = getattr(args, "fft_hidden_dim", 1024)
args.fft_kernel_size = getattr(args, "fft_kernel_size", 9)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.encoder_layers = getattr(args, "encoder_layers", 4)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 256)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 2)
args.decoder_layers = getattr(args, "decoder_layers", 4)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 256)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 2)
# variance predictor
args.var_pred_n_bins = getattr(args, "var_pred_n_bins", 256)
args.var_pred_hidden_dim = getattr(args, "var_pred_hidden_dim", 256)
args.var_pred_kernel_size = getattr(args, "var_pred_kernel_size", 3)
args.var_pred_dropout = getattr(args, "var_pred_dropout", 0.5)
# postnet
args.add_postnet = getattr(args, "add_postnet", False)
args.postnet_dropout = getattr(args, "postnet_dropout", 0.5)
args.postnet_layers = getattr(args, "postnet_layers", 5)
args.postnet_conv_dim = getattr(args, "postnet_conv_dim", 512)
args.postnet_conv_kernel_size = getattr(args, "postnet_conv_kernel_size", 5)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/fastspeech2.py
|
import torch
import torch.nn as nn
import torch.nn.functional as F
from torch.nn import Conv1d, ConvTranspose1d
from torch.nn.utils import weight_norm, remove_weight_norm
LRELU_SLOPE = 0.1
def init_weights(m, mean=0.0, std=0.01):
classname = m.__class__.__name__
if classname.find("Conv") != -1:
m.weight.data.normal_(mean, std)
def get_padding(kernel_size, dilation=1):
return (kernel_size * dilation - dilation) // 2
class ResBlock(torch.nn.Module):
def __init__(self, channels, kernel_size=3, dilation=(1, 3, 5)):
super(ResBlock, self).__init__()
self.convs1 = nn.ModuleList(
[
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=dilation[0],
padding=get_padding(kernel_size, dilation[0]),
)
),
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=dilation[1],
padding=get_padding(kernel_size, dilation[1]),
)
),
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=dilation[2],
padding=get_padding(kernel_size, dilation[2]),
)
),
]
)
self.convs1.apply(init_weights)
self.convs2 = nn.ModuleList(
[
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=1,
padding=get_padding(kernel_size, 1),
)
),
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=1,
padding=get_padding(kernel_size, 1),
)
),
weight_norm(
Conv1d(
channels,
channels,
kernel_size,
1,
dilation=1,
padding=get_padding(kernel_size, 1),
)
),
]
)
self.convs2.apply(init_weights)
def forward(self, x):
for c1, c2 in zip(self.convs1, self.convs2):
xt = F.leaky_relu(x, LRELU_SLOPE)
xt = c1(xt)
xt = F.leaky_relu(xt, LRELU_SLOPE)
xt = c2(xt)
x = xt + x
return x
def remove_weight_norm(self):
for layer in self.convs1:
remove_weight_norm(layer)
for layer in self.convs2:
remove_weight_norm(layer)
class Generator(torch.nn.Module):
def __init__(self, cfg):
super(Generator, self).__init__()
self.num_kernels = len(cfg["resblock_kernel_sizes"])
self.num_upsamples = len(cfg["upsample_rates"])
self.conv_pre = weight_norm(
Conv1d(
cfg.get("model_in_dim", 80),
cfg["upsample_initial_channel"],
7,
1,
padding=3,
)
)
self.ups = nn.ModuleList()
for i, (u, k) in enumerate(
zip(cfg["upsample_rates"], cfg["upsample_kernel_sizes"])
):
self.ups.append(
weight_norm(
ConvTranspose1d(
cfg["upsample_initial_channel"] // (2 ** i),
cfg["upsample_initial_channel"] // (2 ** (i + 1)),
k,
u,
padding=(k - u) // 2,
)
)
)
self.resblocks = nn.ModuleList()
for i in range(len(self.ups)):
ch = cfg["upsample_initial_channel"] // (2 ** (i + 1))
for k, d in zip(
cfg["resblock_kernel_sizes"], cfg["resblock_dilation_sizes"]
):
self.resblocks.append(ResBlock(ch, k, d))
self.conv_post = weight_norm(Conv1d(ch, 1, 7, 1, padding=3))
self.ups.apply(init_weights)
self.conv_post.apply(init_weights)
def forward(self, x):
x = self.conv_pre(x)
for i in range(self.num_upsamples):
x = F.leaky_relu(x, LRELU_SLOPE)
x = self.ups[i](x)
xs = None
for j in range(self.num_kernels):
if xs is None:
xs = self.resblocks[i * self.num_kernels + j](x)
else:
xs += self.resblocks[i * self.num_kernels + j](x)
x = xs / self.num_kernels
x = F.leaky_relu(x)
x = self.conv_post(x)
x = torch.tanh(x)
return x
def remove_weight_norm(self):
print("Removing weight norm...")
for layer in self.ups:
remove_weight_norm(layer)
for layer in self.resblocks:
layer.remove_weight_norm()
remove_weight_norm(self.conv_pre)
remove_weight_norm(self.conv_post)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/hifigan.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from typing import List, Optional
import torch
from torch import nn
from fairseq import utils
from fairseq.data.data_utils import lengths_to_padding_mask
from fairseq.models import (
FairseqEncoder,
FairseqEncoderDecoderModel,
FairseqIncrementalDecoder,
register_model,
register_model_architecture,
)
from fairseq.models.text_to_speech.hub_interface import TTSHubInterface
from fairseq.models.text_to_speech.tacotron2 import Postnet, Prenet
from fairseq.modules import (
FairseqDropout,
LayerNorm,
PositionalEmbedding,
TransformerDecoderLayer,
TransformerEncoderLayer,
)
logger = logging.getLogger(__name__)
def encoder_init(m):
if isinstance(m, nn.Conv1d):
nn.init.xavier_uniform_(m.weight, torch.nn.init.calculate_gain("relu"))
def Embedding(num_embeddings, embedding_dim):
m = nn.Embedding(num_embeddings, embedding_dim)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
return m
class TTSTransformerEncoder(FairseqEncoder):
def __init__(self, args, src_dict, embed_speaker):
super().__init__(src_dict)
self.padding_idx = src_dict.pad()
self.embed_speaker = embed_speaker
self.spk_emb_proj = None
if embed_speaker is not None:
self.spk_emb_proj = nn.Linear(
args.encoder_embed_dim + args.speaker_embed_dim, args.encoder_embed_dim
)
self.dropout_module = FairseqDropout(
p=args.dropout, module_name=self.__class__.__name__
)
self.embed_tokens = nn.Embedding(
len(src_dict), args.encoder_embed_dim, padding_idx=self.padding_idx
)
assert args.encoder_conv_kernel_size % 2 == 1
self.prenet = nn.ModuleList(
nn.Sequential(
nn.Conv1d(
args.encoder_embed_dim,
args.encoder_embed_dim,
kernel_size=args.encoder_conv_kernel_size,
padding=((args.encoder_conv_kernel_size - 1) // 2),
),
nn.BatchNorm1d(args.encoder_embed_dim),
nn.ReLU(),
nn.Dropout(args.encoder_dropout),
)
for _ in range(args.encoder_conv_layers)
)
self.prenet_proj = nn.Linear(args.encoder_embed_dim, args.encoder_embed_dim)
self.embed_positions = PositionalEmbedding(
args.max_source_positions, args.encoder_embed_dim, self.padding_idx
)
self.pos_emb_alpha = nn.Parameter(torch.ones(1))
self.transformer_layers = nn.ModuleList(
TransformerEncoderLayer(args)
for _ in range(args.encoder_transformer_layers)
)
if args.encoder_normalize_before:
self.layer_norm = LayerNorm(args.encoder_embed_dim)
else:
self.layer_norm = None
self.apply(encoder_init)
def forward(self, src_tokens, src_lengths=None, speaker=None, **kwargs):
x = self.embed_tokens(src_tokens)
x = x.transpose(1, 2).contiguous() # B x T x C -> B x C x T
for conv in self.prenet:
x = conv(x)
x = x.transpose(1, 2).contiguous() # B x C x T -> B x T x C
x = self.prenet_proj(x)
padding_mask = src_tokens.eq(self.padding_idx)
positions = self.embed_positions(padding_mask)
x += self.pos_emb_alpha * positions
x = self.dropout_module(x)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
for layer in self.transformer_layers:
x = layer(x, padding_mask)
if self.layer_norm is not None:
x = self.layer_norm(x)
if self.embed_speaker is not None:
seq_len, bsz, _ = x.size()
emb = self.embed_speaker(speaker).transpose(0, 1)
emb = emb.expand(seq_len, bsz, -1)
x = self.spk_emb_proj(torch.cat([x, emb], dim=2))
return {
"encoder_out": [x], # T x B x C
"encoder_padding_mask": [padding_mask]
if padding_mask.any()
else [], # B x T
"encoder_embedding": [], # B x T x C
"encoder_states": [], # List[T x B x C]
"src_tokens": [],
"src_lengths": [],
}
def decoder_init(m):
if isinstance(m, torch.nn.Conv1d):
nn.init.xavier_uniform_(m.weight, torch.nn.init.calculate_gain("tanh"))
class TTSTransformerDecoder(FairseqIncrementalDecoder):
def __init__(self, args, src_dict, padding_idx=1):
super().__init__(None)
self._future_mask = torch.empty(0)
self.args = args
self.padding_idx = src_dict.pad() if src_dict else padding_idx
self.n_frames_per_step = args.n_frames_per_step
self.out_dim = args.output_frame_dim * args.n_frames_per_step
self.dropout_module = FairseqDropout(
args.dropout, module_name=self.__class__.__name__
)
self.embed_positions = PositionalEmbedding(
args.max_target_positions, args.decoder_embed_dim, self.padding_idx
)
self.pos_emb_alpha = nn.Parameter(torch.ones(1))
self.prenet = nn.Sequential(
Prenet(
self.out_dim, args.prenet_layers, args.prenet_dim, args.prenet_dropout
),
nn.Linear(args.prenet_dim, args.decoder_embed_dim),
)
self.n_transformer_layers = args.decoder_transformer_layers
self.transformer_layers = nn.ModuleList(
TransformerDecoderLayer(args) for _ in range(self.n_transformer_layers)
)
if args.decoder_normalize_before:
self.layer_norm = LayerNorm(args.decoder_embed_dim)
else:
self.layer_norm = None
self.feat_proj = nn.Linear(args.decoder_embed_dim, self.out_dim)
self.eos_proj = nn.Linear(args.decoder_embed_dim, 1)
self.postnet = Postnet(
self.out_dim,
args.postnet_conv_dim,
args.postnet_conv_kernel_size,
args.postnet_layers,
args.postnet_dropout,
)
self.ctc_proj = None
if getattr(args, "ctc_weight", 0.0) > 0.0:
self.ctc_proj = nn.Linear(self.out_dim, len(src_dict))
self.apply(decoder_init)
def extract_features(
self,
prev_outputs,
encoder_out=None,
incremental_state=None,
target_lengths=None,
speaker=None,
**kwargs,
):
alignment_layer = self.n_transformer_layers - 1
self_attn_padding_mask = lengths_to_padding_mask(target_lengths)
positions = self.embed_positions(
self_attn_padding_mask, incremental_state=incremental_state
)
if incremental_state is not None:
prev_outputs = prev_outputs[:, -1:, :]
self_attn_padding_mask = self_attn_padding_mask[:, -1:]
if positions is not None:
positions = positions[:, -1:]
x = self.prenet(prev_outputs)
x += self.pos_emb_alpha * positions
x = self.dropout_module(x)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
if not self_attn_padding_mask.any():
self_attn_padding_mask = None
attn: Optional[torch.Tensor] = None
inner_states: List[Optional[torch.Tensor]] = [x]
for idx, transformer_layer in enumerate(self.transformer_layers):
if incremental_state is None:
self_attn_mask = self.buffered_future_mask(x)
else:
self_attn_mask = None
x, layer_attn, _ = transformer_layer(
x,
encoder_out["encoder_out"][0]
if (encoder_out is not None and len(encoder_out["encoder_out"]) > 0)
else None,
encoder_out["encoder_padding_mask"][0]
if (
encoder_out is not None
and len(encoder_out["encoder_padding_mask"]) > 0
)
else None,
incremental_state,
self_attn_mask=self_attn_mask,
self_attn_padding_mask=self_attn_padding_mask,
need_attn=bool((idx == alignment_layer)),
need_head_weights=bool((idx == alignment_layer)),
)
inner_states.append(x)
if layer_attn is not None and idx == alignment_layer:
attn = layer_attn.float().to(x)
if attn is not None:
# average probabilities over heads, transpose to
# (B, src_len, tgt_len)
attn = attn.mean(dim=0).transpose(2, 1)
if self.layer_norm is not None:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
return x, {"attn": attn, "inner_states": inner_states}
def forward(
self,
prev_output_tokens,
encoder_out=None,
incremental_state=None,
target_lengths=None,
speaker=None,
**kwargs,
):
x, extra = self.extract_features(
prev_output_tokens,
encoder_out=encoder_out,
incremental_state=incremental_state,
target_lengths=target_lengths,
speaker=speaker,
**kwargs,
)
attn = extra["attn"]
feat_out = self.feat_proj(x)
bsz, seq_len, _ = x.size()
eos_out = self.eos_proj(x)
post_feat_out = feat_out + self.postnet(feat_out)
return (
post_feat_out,
eos_out,
{
"attn": attn,
"feature_out": feat_out,
"inner_states": extra["inner_states"],
},
)
def get_normalized_probs(self, net_output, log_probs, sample):
logits = self.ctc_proj(net_output[2]["feature_out"])
if log_probs:
return utils.log_softmax(logits.float(), dim=-1)
else:
return utils.softmax(logits.float(), dim=-1)
def buffered_future_mask(self, tensor):
dim = tensor.size(0)
# self._future_mask.device != tensor.device is not working in TorchScript. This is a workaround.
if (
self._future_mask.size(0) == 0
or (not self._future_mask.device == tensor.device)
or self._future_mask.size(0) < dim
):
self._future_mask = torch.triu(
utils.fill_with_neg_inf(torch.zeros([dim, dim])), 1
)
self._future_mask = self._future_mask.to(tensor)
return self._future_mask[:dim, :dim]
@register_model("tts_transformer")
class TTSTransformerModel(FairseqEncoderDecoderModel):
"""
Implementation for https://arxiv.org/pdf/1809.08895.pdf
"""
@classmethod
def hub_models(cls):
base_url = "http://dl.fbaipublicfiles.com/fairseq/s2"
model_ids = [
"tts_transformer-en-ljspeech",
"tts_transformer-en-200_speaker-cv4",
"tts_transformer-es-css10",
"tts_transformer-fr-cv7_css10",
"tts_transformer-ru-cv7_css10",
"tts_transformer-zh-cv7_css10",
"tts_transformer-ar-cv7_css10",
"tts_transformer-tr-cv7_css10",
"tts_transformer-vi-cv7",
]
return {i: f"{base_url}/{i}.tar.gz" for i in model_ids}
@classmethod
def from_pretrained(
cls,
model_name_or_path,
checkpoint_file="model.pt",
data_name_or_path=".",
config_yaml="config.yaml",
vocoder: str = "griffin_lim",
fp16: bool = False,
**kwargs,
):
from fairseq import hub_utils
x = hub_utils.from_pretrained(
model_name_or_path,
checkpoint_file,
data_name_or_path,
archive_map=cls.hub_models(),
config_yaml=config_yaml,
vocoder=vocoder,
fp16=fp16,
**kwargs,
)
return TTSHubInterface(x["args"], x["task"], x["models"][0])
@staticmethod
def add_args(parser):
parser.add_argument("--dropout", type=float)
parser.add_argument("--output-frame-dim", type=int)
parser.add_argument("--speaker-embed-dim", type=int)
# encoder prenet
parser.add_argument("--encoder-dropout", type=float)
parser.add_argument("--encoder-conv-layers", type=int)
parser.add_argument("--encoder-conv-kernel-size", type=int)
# encoder transformer layers
parser.add_argument("--encoder-transformer-layers", type=int)
parser.add_argument("--encoder-embed-dim", type=int)
parser.add_argument("--encoder-ffn-embed-dim", type=int)
parser.add_argument("--encoder-normalize-before", action="store_true")
parser.add_argument("--encoder-attention-heads", type=int)
parser.add_argument("--attention-dropout", type=float)
parser.add_argument("--activation-dropout", "--relu-dropout", type=float)
parser.add_argument("--activation-fn", type=str, default="relu")
# decoder prenet
parser.add_argument("--prenet-dropout", type=float)
parser.add_argument("--prenet-layers", type=int)
parser.add_argument("--prenet-dim", type=int)
# decoder postnet
parser.add_argument("--postnet-dropout", type=float)
parser.add_argument("--postnet-layers", type=int)
parser.add_argument("--postnet-conv-dim", type=int)
parser.add_argument("--postnet-conv-kernel-size", type=int)
# decoder transformer layers
parser.add_argument("--decoder-transformer-layers", type=int)
parser.add_argument("--decoder-embed-dim", type=int)
parser.add_argument("--decoder-ffn-embed-dim", type=int)
parser.add_argument("--decoder-normalize-before", action="store_true")
parser.add_argument("--decoder-attention-heads", type=int)
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self._num_updates = 0
@classmethod
def build_model(cls, args, task):
embed_speaker = task.get_speaker_embeddings(args)
encoder = TTSTransformerEncoder(args, task.src_dict, embed_speaker)
decoder = TTSTransformerDecoder(args, task.src_dict)
return cls(encoder, decoder)
def forward_encoder(self, src_tokens, src_lengths, speaker=None, **kwargs):
return self.encoder(
src_tokens, src_lengths=src_lengths, speaker=speaker, **kwargs
)
def set_num_updates(self, num_updates):
super().set_num_updates(num_updates)
self._num_updates = num_updates
@register_model_architecture("tts_transformer", "tts_transformer")
def base_architecture(args):
args.dropout = getattr(args, "dropout", 0.1)
args.output_frame_dim = getattr(args, "output_frame_dim", 80)
args.speaker_embed_dim = getattr(args, "speaker_embed_dim", 64)
# encoder prenet
args.encoder_dropout = getattr(args, "encoder_dropout", 0.5)
args.encoder_conv_layers = getattr(args, "encoder_conv_layers", 3)
args.encoder_conv_kernel_size = getattr(args, "encoder_conv_kernel_size", 5)
# encoder transformer layers
args.encoder_transformer_layers = getattr(args, "encoder_transformer_layers", 6)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 512)
args.encoder_ffn_embed_dim = getattr(
args, "encoder_ffn_embed_dim", 4 * args.encoder_embed_dim
)
args.encoder_normalize_before = getattr(args, "encoder_normalize_before", False)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 4)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.activation_fn = getattr(args, "activation_fn", "relu")
# decoder prenet
args.prenet_dropout = getattr(args, "prenet_dropout", 0.5)
args.prenet_layers = getattr(args, "prenet_layers", 2)
args.prenet_dim = getattr(args, "prenet_dim", 256)
# decoder postnet
args.postnet_dropout = getattr(args, "postnet_dropout", 0.5)
args.postnet_layers = getattr(args, "postnet_layers", 5)
args.postnet_conv_dim = getattr(args, "postnet_conv_dim", 512)
args.postnet_conv_kernel_size = getattr(args, "postnet_conv_kernel_size", 5)
# decoder transformer layers
args.decoder_transformer_layers = getattr(args, "decoder_transformer_layers", 6)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 512)
args.decoder_ffn_embed_dim = getattr(
args, "decoder_ffn_embed_dim", 4 * args.decoder_embed_dim
)
args.decoder_normalize_before = getattr(args, "decoder_normalize_before", False)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 4)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/tts_transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from pathlib import Path
from typing import Optional, Dict, Tuple
import random
import torch
import torch.nn as nn
logger = logging.getLogger(__name__)
class TTSHubInterface(nn.Module):
def __init__(self, cfg, task, model):
super().__init__()
self.cfg = cfg
self.task = task
self.model = model
self.model.eval()
self.update_cfg_with_data_cfg(self.cfg, self.task.data_cfg)
self.generator = self.task.build_generator([self.model], self.cfg)
@classmethod
def phonemize(
cls,
text: str,
lang: Optional[str],
phonemizer: Optional[str] = None,
preserve_punct: bool = False,
to_simplified_zh: bool = False,
):
if to_simplified_zh:
import hanziconv
text = hanziconv.HanziConv.toSimplified(text)
if phonemizer == "g2p":
import g2p_en
g2p = g2p_en.G2p()
if preserve_punct:
return " ".join("|" if p == " " else p for p in g2p(text))
else:
res = [{",": "sp", ";": "sp"}.get(p, p) for p in g2p(text)]
return " ".join(p for p in res if p.isalnum())
if phonemizer == "g2pc":
import g2pc
g2p = g2pc.G2pC()
return " ".join([w[3] for w in g2p(text)])
elif phonemizer == "ipa":
assert lang is not None
import phonemizer
from phonemizer.separator import Separator
lang_map = {"en": "en-us", "fr": "fr-fr"}
return phonemizer.phonemize(
text,
backend="espeak",
language=lang_map.get(lang, lang),
separator=Separator(word="| ", phone=" "),
)
else:
return text
@classmethod
def tokenize(cls, text: str, tkn_cfg: Dict[str, str]):
sentencepiece_model = tkn_cfg.get("sentencepiece_model", None)
if sentencepiece_model is not None:
assert Path(sentencepiece_model).exists()
import sentencepiece as sp
spm = sp.SentencePieceProcessor()
spm.Load(sentencepiece_model)
return " ".join(spm.Encode(text, out_type=str))
else:
return text
@classmethod
def update_cfg_with_data_cfg(cls, cfg, data_cfg):
cfg["task"].vocoder = data_cfg.vocoder.get("type", "griffin_lim")
@classmethod
def get_model_input(
cls, task, text: str, speaker: Optional[int] = None, verbose: bool = False
):
phonemized = cls.phonemize(
text,
task.data_cfg.hub.get("lang", None),
task.data_cfg.hub.get("phonemizer", None),
task.data_cfg.hub.get("preserve_punct", False),
task.data_cfg.hub.get("to_simplified_zh", False),
)
tkn_cfg = task.data_cfg.bpe_tokenizer
tokenized = cls.tokenize(phonemized, tkn_cfg)
if verbose:
logger.info(f"text: {text}")
logger.info(f"phonemized: {phonemized}")
logger.info(f"tokenized: {tokenized}")
spk = task.data_cfg.hub.get("speaker", speaker)
n_speakers = len(task.speaker_to_id or {})
if spk is None and n_speakers > 0:
spk = random.randint(0, n_speakers - 1)
if spk is not None:
spk = max(0, min(spk, n_speakers - 1))
if verbose:
logger.info(f"speaker: {spk}")
spk = None if spk is None else torch.Tensor([[spk]]).long()
src_tokens = task.src_dict.encode_line(tokenized).view(1, -1)
src_lengths = torch.Tensor([len(tokenized.split())]).long()
return {
"net_input": {
"src_tokens": src_tokens,
"src_lengths": src_lengths,
"prev_output_tokens": None,
},
"target_lengths": None,
"speaker": spk,
}
@classmethod
def get_prediction(cls, task, model, generator, sample) -> Tuple[torch.Tensor, int]:
prediction = generator.generate(model, sample)
return prediction[0]["waveform"], task.sr
def predict(
self, text: str, speaker: Optional[int] = None, verbose: bool = False
) -> Tuple[torch.Tensor, int]:
sample = self.get_model_input(self.task, text, speaker, verbose=verbose)
return self.get_prediction(self.task, self.model, self.generator, sample)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/models/text_to_speech/hub_interface.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
Train a network across multiple GPUs.
"""
from fairseq.dataclass.configs import FairseqConfig
from fairseq.distributed import utils as distributed_utils
from fairseq.trainer import Trainer
try:
from fairseq.model_parallel.megatron.mpu import (
get_data_parallel_rank,
get_data_parallel_world_size,
get_model_parallel_src_rank,
get_cuda_rng_tracker,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
class MegatronTrainer(Trainer):
"""Main class for model parallel with data parallel training."""
def __init__(self, cfg: FairseqConfig, task, model, criterion, **kwargs):
if not has_megatron_submodule:
raise ImportError(
"\n\nPlease install the megatron submodule:"
"\n\n git submodule update --init "
"fairseq/model_parallel/megatron"
)
super().__init__(cfg, task, model, criterion, **kwargs)
def clip_grad_norm(self, clip_norm):
def _aggregate_model_parallel_grad_norm(total_norm):
total_norm = total_norm ** 2
distributed_utils.all_reduce(
total_norm, group=distributed_utils.get_model_parallel_group()
)
total_norm = total_norm ** 0.5
return total_norm
return self.optimizer.clip_grad_norm(
clip_norm,
aggregate_norm_fn=_aggregate_model_parallel_grad_norm,
)
def save_checkpoint(self, filename, extra_state):
"""Save all training state in a checkpoint file."""
extra_state["rng_tracker_states"] = get_cuda_rng_tracker().get_states()
super().save_checkpoint(filename, extra_state)
def load_checkpoint(
self,
filename,
reset_optimizer=False,
reset_lr_scheduler=False,
optimizer_overrides=None,
reset_meters=False,
):
extra_state = super().load_checkpoint(
filename,
reset_optimizer=reset_optimizer,
reset_lr_scheduler=reset_lr_scheduler,
optimizer_overrides=optimizer_overrides,
reset_meters=reset_meters,
)
if extra_state is not None and "rng_tracker_states" in extra_state:
get_cuda_rng_tracker().set_states(extra_state["rng_tracker_states"])
return extra_state
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/megatron_trainer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from . import criterions, models, modules # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import importlib
import os
# automatically import any Python files in the models/ directory
models_dir = os.path.dirname(__file__)
for file in os.listdir(models_dir):
path = os.path.join(models_dir, file)
if (
not file.startswith("_")
and not file.startswith(".")
and (file.endswith(".py") or os.path.isdir(path))
):
model_name = file[: file.find(".py")] if file.endswith(".py") else file
module = importlib.import_module("fairseq.model_parallel.models." + model_name)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import torch.nn as nn
from fairseq.model_parallel.modules import (
ModelParallelTransformerDecoderLayer,
ModelParallelTransformerEncoderLayer,
)
from fairseq.models import register_model
from fairseq.models.transformer import (
TransformerDecoder,
TransformerEncoder,
TransformerModel,
)
try:
from fairseq.model_parallel.megatron.mpu import (
copy_to_model_parallel_region,
gather_from_model_parallel_region,
VocabParallelEmbedding,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
logger = logging.getLogger(__name__)
@register_model("model_parallel_transformer")
class ModelParallelTransformerModel(TransformerModel):
"""
Model parallel Transformer model.
"""
@classmethod
def build_embedding(cls, args, dictionary, embed_dim, path=None):
if not has_megatron_submodule:
raise ImportError(
"\n\nPlease install the megatron submodule:"
"\n\n git submodule update --init "
"fairseq/model_parallel/megatron"
)
dictionary.pad_to_multiple_(args.model_parallel_size * 8)
num_embeddings = len(dictionary)
padding_idx = dictionary.pad()
def _vocab_init(tensor, **kwargs):
nn.init.normal_(tensor, mean=0, std=num_embeddings ** -0.5)
nn.init.constant_(tensor[1], 0)
emb = VocabParallelEmbedding(
num_embeddings, embed_dim, padding_idx, init_method=_vocab_init
)
# if provided, load from preloaded dictionaries
if path:
raise NotImplementedError(
"Loading of embedding from path is not supported for model parallel"
)
return emb
@classmethod
def build_encoder(cls, args, src_dict, embed_tokens):
return ModelParallelTransformerEncoder(args, src_dict, embed_tokens)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
return ModelParallelTransformerDecoder(
args,
tgt_dict,
embed_tokens,
no_encoder_attn=getattr(args, "no_cross_attention", False),
)
class ModelParallelTransformerEncoder(TransformerEncoder):
"""
Model parallel Transformer encoder consisting of *args.encoder_layers* layers. Each layer
is a :class:`ModelParallelTransformerEncoderLayer`.
"""
def __init__(self, args, dictionary, embed_tokens):
super().__init__(args, dictionary, embed_tokens)
if args.no_final_layer_norm:
self.layer_norm = None
def build_encoder_layer(self, args):
return ModelParallelTransformerEncoderLayer(args)
class ModelParallelTransformerDecoder(TransformerDecoder):
"""
Model Parallel Transformer decoder consisting of *args.decoder_layers* layers. Each layer
is a :class:`ModelParallelTransformerDecoderLayer`.
"""
def build_decoder_layer(self, args, no_encoder_attn=False):
return ModelParallelTransformerDecoderLayer(args, no_encoder_attn)
def output_layer(self, features, **kwargs):
"""Project features to the vocabulary size."""
if not self.share_input_output_embed:
raise NotImplementedError(
"Model parallel training currently requires --share-decoder-input-output-embed"
)
features = copy_to_model_parallel_region(features)
# project back to size of vocabulary
x = self.output_projection(features)
if getattr(self.args, "criterion") != "vocab_parallel_cross_entropy":
x = gather_from_model_parallel_region(x).contiguous()
return x
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/transformer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch.nn as nn
from fairseq.model_parallel.models.transformer import ModelParallelTransformerDecoder
from fairseq.models import register_model, register_model_architecture
from fairseq.models.transformer_lm import TransformerLanguageModel
try:
from fairseq.model_parallel.megatron.mpu import VocabParallelEmbedding
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
DEFAULT_MAX_TARGET_POSITIONS = 1024
@register_model("model_parallel_transformer_lm")
class ModelParallelTransformerLanguageModel(TransformerLanguageModel):
@staticmethod
def add_args(parser):
TransformerLanguageModel.add_args(parser)
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
if not has_megatron_submodule:
raise ImportError(
"\n\nPlease install the megatron submodule:"
"\n\n git submodule update --init "
"fairseq/model_parallel/megatron"
)
# make sure all arguments are present in older models
base_lm_architecture(args)
task.source_dictionary.pad_to_multiple_(args.model_parallel_size * 8)
task.target_dictionary.pad_to_multiple_(args.model_parallel_size * 8)
if args.decoder_layers_to_keep:
args.decoder_layers = len(args.decoder_layers_to_keep.split(","))
if getattr(args, "max_target_positions", None) is None:
args.max_target_positions = getattr(
args, "tokens_per_sample", DEFAULT_MAX_TARGET_POSITIONS
)
if args.character_embeddings:
raise NotImplementedError(
"Character embeddings is not supported for model parallel"
)
elif args.adaptive_input:
raise NotImplementedError(
"Adaptive input is not supported for model parallel"
)
else:
embed_tokens = cls.build_embedding(
args, task.source_dictionary, args.decoder_input_dim
)
decoder = ModelParallelTransformerDecoder(
args,
task.target_dictionary,
embed_tokens,
no_encoder_attn=True,
)
return cls(decoder)
@classmethod
def build_embedding(cls, args, dictionary, embed_dim, path=None):
def _vocab_init(tensor, **kwargs):
nn.init.normal_(tensor, mean=0, std=embed_dim ** -0.5)
nn.init.constant_(tensor[1], 0)
embed_tokens = VocabParallelEmbedding(
len(dictionary), embed_dim, dictionary.pad(), init_method=_vocab_init
)
return embed_tokens
def base_lm_architecture(args):
# backward compatibility for older model checkpoints
if hasattr(args, "no_tie_adaptive_proj"):
# previous models defined --no-tie-adaptive-proj, so use the existence of
# that option to determine if this is an "old" model checkpoint
args.no_decoder_final_norm = True # old models always set this to True
if args.no_tie_adaptive_proj is False:
args.tie_adaptive_proj = True
if hasattr(args, "decoder_final_norm"):
args.no_decoder_final_norm = not args.decoder_final_norm
args.activation_fn = getattr(args, "activation_fn", "relu")
args.dropout = getattr(args, "dropout", 0.1)
args.attention_dropout = getattr(args, "attention_dropout", 0.0)
args.activation_dropout = getattr(args, "activation_dropout", 0.0)
args.relu_dropout = getattr(args, "relu_dropout", 0.0)
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 512)
args.decoder_output_dim = getattr(
args, "decoder_output_dim", args.decoder_embed_dim
)
args.decoder_input_dim = getattr(args, "decoder_input_dim", args.decoder_embed_dim)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 2048)
args.decoder_layers = getattr(args, "decoder_layers", 6)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 8)
# Model training is not stable without this
args.decoder_normalize_before = True
args.no_decoder_final_norm = getattr(args, "no_decoder_final_norm", False)
args.adaptive_softmax_cutoff = getattr(args, "adaptive_softmax_cutoff", None)
args.adaptive_softmax_dropout = getattr(args, "adaptive_softmax_dropout", 0)
args.adaptive_softmax_factor = getattr(args, "adaptive_softmax_factor", 4)
args.no_token_positional_embeddings = getattr(
args, "no_token_positional_embeddings", False
)
args.share_decoder_input_output_embed = getattr(
args, "share_decoder_input_output_embed", False
)
args.character_embeddings = getattr(args, "character_embeddings", False)
args.character_filters = getattr(
args,
"character_filters",
"[(1, 64), (2, 128), (3, 192), (4, 256), (5, 256), (6, 256), (7, 256)]",
)
args.character_embedding_dim = getattr(args, "character_embedding_dim", 4)
args.char_embedder_highway_layers = getattr(args, "char_embedder_highway_layers", 2)
args.adaptive_input = getattr(args, "adaptive_input", False)
args.adaptive_input_factor = getattr(args, "adaptive_input_factor", 4)
args.adaptive_input_cutoff = getattr(args, "adaptive_input_cutoff", None)
args.tie_adaptive_weights = getattr(args, "tie_adaptive_weights", False)
args.tie_adaptive_proj = getattr(args, "tie_adaptive_proj", False)
args.decoder_learned_pos = getattr(args, "decoder_learned_pos", False)
args.decoder_layerdrop = getattr(args, "decoder_layerdrop", 0.0)
args.decoder_layers_to_keep = getattr(args, "decoder_layers_to_keep", None)
args.layernorm_embedding = getattr(args, "layernorm_embedding", False)
args.no_scale_embedding = getattr(args, "no_scale_embedding", False)
args.quant_noise_pq = getattr(args, "quant_noise_pq", 0.0)
args.quant_noise_pq_block_size = getattr(args, "quant_noise_pq_block_size", 8)
args.quant_noise_scalar = getattr(args, "quant_noise_scalar", 0.0)
args.add_bos_token = getattr(args, "add_bos_token", False)
@register_model_architecture("model_parallel_transformer_lm", "transformer_lm_megatron")
def transformer_lm_megatron(args):
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 3072)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 3072 * 4)
args.decoder_layers = getattr(args, "decoder_layers", 72)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 32)
args.dropout = getattr(args, "dropout", 0.1)
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
args.activation_fn = getattr(args, "activation_fn", "gelu")
base_lm_architecture(args)
@register_model_architecture(
"model_parallel_transformer_lm", "transformer_lm_megatron_11b"
)
def transformer_lm_megatron_11b(args):
args.decoder_embed_dim = getattr(args, "decoder_embed_dim", 3072)
args.decoder_ffn_embed_dim = getattr(args, "decoder_ffn_embed_dim", 3072 * 6)
args.decoder_layers = getattr(args, "decoder_layers", 72)
args.decoder_attention_heads = getattr(args, "decoder_attention_heads", 32)
args.dropout = getattr(args, "dropout", 0.1)
args.attention_dropout = getattr(args, "attention_dropout", 0.1)
args.activation_fn = getattr(args, "activation_fn", "gelu")
base_lm_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/transformer_lm.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .model import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/pipeline_parallel_transformer/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from fairseq.model_parallel.models.pipeline_parallel_transformer.layers import (
Embedding,
TransformerDecoderEmbedding,
TransformerDecoderLayer,
TransformerDecoderOutputLayer,
TransformerEncoderEmbedding,
TransformerEncoderLayer,
TransformerEncoderLayerNorm,
)
from fairseq.models import (
BaseFairseqModel,
FairseqDecoder,
FairseqEncoder,
register_model,
register_model_architecture,
)
from fairseq.models.fairseq_encoder import EncoderOut
from fairseq.models.transformer import (
base_architecture,
transformer_iwslt_de_en,
transformer_wmt_en_de_big,
)
from fairseq.modules import SinusoidalPositionalEmbedding
logger = logging.getLogger(__name__)
DEFAULT_MAX_SOURCE_POSITIONS = 1024
DEFAULT_MAX_TARGET_POSITIONS = 1024
TORCH_PIPE = False
RPC_INIT = False
def import_pipe():
global TORCH_PIPE
global RPC_INIT
try:
from torch.distributed.pipeline.sync import Pipe # noqa
global Pipe
from torch.distributed.pipeline.sync.utils import partition_model
global partition_model
from torch.distributed import rpc
import tempfile
TORCH_PIPE = True
# Initialize single process RPC agent since TORCH_PIPE requires
# RRef. RRef depends on RPC being initialized and as a result we initialize
# RPC with a single node.
tmpfile = tempfile.NamedTemporaryFile()
if not RPC_INIT:
rpc.init_rpc(
name="worker",
rank=0,
world_size=1,
rpc_backend_options=rpc.TensorPipeRpcBackendOptions(
init_method="file://{}".format(tmpfile.name),
),
)
RPC_INIT = True
logger.info("Using torch pipe")
except ImportError:
try:
from fairscale.nn import Pipe # noqa
logger.info("Using fairscale pipe")
except ImportError:
raise ImportError("Please install fairscale with: pip install fairscale")
@register_model("pipeline_parallel_transformer")
class PipelineParallelTransformerModel(BaseFairseqModel):
def __init__(self, encoder, decoder, balance, devices, chunks, checkpoint):
import_pipe()
super().__init__()
assert isinstance(encoder, FairseqEncoder)
assert isinstance(decoder, FairseqDecoder)
encoder_module_list = (
[encoder.embedding_layer]
+ list(encoder.encoder_layers)
+ [encoder.final_layer_norm]
)
self.num_encoder_modules = len(encoder_module_list)
decoder_module_list = (
[decoder.embedding_layer]
+ list(decoder.decoder_layers)
+ [decoder.decoder_output_layer]
)
self.num_decoder_modules = len(decoder_module_list)
module_list = encoder_module_list + decoder_module_list
self.devices = devices
if TORCH_PIPE:
self.model = Pipe(
partition_model(nn.Sequential(*module_list), balance, devices),
chunks=chunks,
checkpoint=checkpoint,
)
else:
self.model = Pipe(
nn.Sequential(*module_list),
balance=balance,
devices=devices,
chunks=chunks,
checkpoint=checkpoint,
)
self.encoder_max_positions = self.max_positions_helper(
encoder.embedding_layer, "max_source_positions"
)
self.decoder_max_positions = self.max_positions_helper(
decoder.embedding_layer, "max_target_positions"
)
self.adaptive_softmax = getattr(decoder, "adaptive_softmax", None)
# Note: To be populated during inference
self.encoder = None
self.decoder = None
def forward(self, src_tokens, src_lengths, prev_output_tokens):
if self.training:
input_lst = [src_tokens, src_lengths, prev_output_tokens]
input = tuple(i.to(self.devices[0], non_blocking=True) for i in input_lst)
if TORCH_PIPE:
return self.model(input).local_value()
else:
return self.model(input)
else:
assert self.encoder is not None and self.decoder is not None, (
"encoder and decoder need to be initialized by "
+ "calling the `prepare_for_inference_()` method"
)
encoder_output_tuple = self.encoder(input)
return self.decoder(encoder_output_tuple)
def prepare_for_inference_(self, cfg):
if self.encoder is not None and self.decoder is not None:
logger.info("Encoder and Decoder already initialized")
return
encoder_module_list = []
decoder_module_list = []
module_count = 0
for partition in self.model.partitions:
for module in partition:
if module_count < self.num_encoder_modules:
encoder_module_list.append(module)
else:
decoder_module_list.append(module)
module_count += 1
self.model = None
self.encoder = TransformerEncoder(
cfg.distributed_training, None, None, encoder_module_list
)
self.decoder = TransformerDecoder(
cfg.distributed_training,
None,
None,
decoder_module_list=decoder_module_list,
)
@staticmethod
def add_args(parser):
"""Add model-specific arguments to the parser."""
# fmt: off
parser.add_argument('--activation-fn',
choices=utils.get_available_activation_fns(),
help='activation function to use')
parser.add_argument('--dropout', type=float, metavar='D',
help='dropout probability')
parser.add_argument('--attention-dropout', type=float, metavar='D',
help='dropout probability for attention weights')
parser.add_argument('--activation-dropout', '--relu-dropout', type=float, metavar='D',
help='dropout probability after activation in FFN.')
parser.add_argument('--encoder-embed-path', type=str, metavar='STR',
help='path to pre-trained encoder embedding')
parser.add_argument('--encoder-embed-dim', type=int, metavar='N',
help='encoder embedding dimension')
parser.add_argument('--encoder-ffn-embed-dim', type=int, metavar='N',
help='encoder embedding dimension for FFN')
parser.add_argument('--encoder-layers', type=int, metavar='N',
help='num encoder layers')
parser.add_argument('--encoder-attention-heads', type=int, metavar='N',
help='num encoder attention heads')
parser.add_argument('--encoder-normalize-before', action='store_true',
help='apply layernorm before each encoder block')
parser.add_argument('--encoder-learned-pos', action='store_true',
help='use learned positional embeddings in the encoder')
parser.add_argument('--decoder-embed-path', type=str, metavar='STR',
help='path to pre-trained decoder embedding')
parser.add_argument('--decoder-embed-dim', type=int, metavar='N',
help='decoder embedding dimension')
parser.add_argument('--decoder-ffn-embed-dim', type=int, metavar='N',
help='decoder embedding dimension for FFN')
parser.add_argument('--decoder-layers', type=int, metavar='N',
help='num decoder layers')
parser.add_argument('--decoder-attention-heads', type=int, metavar='N',
help='num decoder attention heads')
parser.add_argument('--decoder-learned-pos', action='store_true',
help='use learned positional embeddings in the decoder')
parser.add_argument('--decoder-normalize-before', action='store_true',
help='apply layernorm before each decoder block')
parser.add_argument('--share-decoder-input-output-embed', action='store_true',
help='share decoder input and output embeddings')
parser.add_argument('--share-all-embeddings', action='store_true',
help='share encoder, decoder and output embeddings'
' (requires shared dictionary and embed dim)')
parser.add_argument('--no-token-positional-embeddings', default=False, action='store_true',
help='if set, disables positional embeddings (outside self attention)')
parser.add_argument('--adaptive-softmax-cutoff', metavar='EXPR',
help='comma separated list of adaptive softmax cutoff points. '
'Must be used with adaptive_loss criterion'),
parser.add_argument('--adaptive-softmax-dropout', type=float, metavar='D',
help='sets adaptive softmax dropout for the tail projections')
parser.add_argument('--num-embedding-chunks', type=int, metavar='N', default=1,
help='Number of embedding layer chunks (enables more even distribution'
'of optimizer states across data parallel nodes'
'when using optimizer state sharding and'
'a big embedding vocabulary)')
# fmt: on
@classmethod
def build_model_base(cls, args, task):
"""Build a new model instance."""
# make sure all arguments are present in older models
base_architecture(args)
if not hasattr(args, "max_source_positions"):
args.max_source_positions = DEFAULT_MAX_SOURCE_POSITIONS
if not hasattr(args, "max_target_positions"):
args.max_target_positions = DEFAULT_MAX_TARGET_POSITIONS
src_dict, tgt_dict = task.source_dictionary, task.target_dictionary
def build_embedding(dictionary, embed_dim, path=None, num_embed_chunks=1):
assert embed_dim % num_embed_chunks == 0, (
f"Number of embedding chunks = {num_embed_chunks} should be "
+ f"divisible by the embedding dimension = {embed_dim}"
)
assert path is None or num_embed_chunks == 1, (
"Loading embedding from a path with number of embedding chunks > 1"
+ " is not yet supported"
)
num_embeddings = len(dictionary)
padding_idx = dictionary.pad()
# if provided, load from preloaded dictionaries
if path:
emb = Embedding(num_embeddings, embed_dim, padding_idx)
embed_dict = utils.parse_embedding(path)
utils.load_embedding(embed_dict, dictionary, emb)
else:
embed_chunk_dim = embed_dim // num_embed_chunks
emb = nn.ModuleList()
for i in range(num_embed_chunks):
emb.append(Embedding(num_embeddings, embed_chunk_dim, padding_idx))
return emb
num_embed_chunks = args.num_embedding_chunks
if args.share_all_embeddings:
if src_dict != tgt_dict:
raise ValueError("--share-all-embeddings requires a joined dictionary")
if args.encoder_embed_dim != args.decoder_embed_dim:
raise ValueError(
"--share-all-embeddings requires --encoder-embed-dim to match --decoder-embed-dim"
)
if args.decoder_embed_path and (
args.decoder_embed_path != args.encoder_embed_path
):
raise ValueError(
"--share-all-embeddings not compatible with --decoder-embed-path"
)
encoder_embed_tokens = build_embedding(
src_dict,
args.encoder_embed_dim,
args.encoder_embed_path,
num_embed_chunks,
)
decoder_embed_tokens = encoder_embed_tokens
args.share_decoder_input_output_embed = True
else:
assert args.share_decoder_input_output_embed or num_embed_chunks == 1, (
"Not sharing decoder I/O embeddings is not yet supported with number of "
+ "embedding chunks > 1"
)
encoder_embed_tokens = build_embedding(
src_dict,
args.encoder_embed_dim,
args.encoder_embed_path,
num_embed_chunks,
)
decoder_embed_tokens = build_embedding(
tgt_dict,
args.decoder_embed_dim,
args.decoder_embed_path,
num_embed_chunks,
)
encoder = cls.build_encoder(args, src_dict, encoder_embed_tokens)
decoder = cls.build_decoder(args, tgt_dict, decoder_embed_tokens)
return (encoder, decoder)
@classmethod
def build_encoder(cls, args, src_dict, embed_tokens):
return TransformerEncoder(args, src_dict, embed_tokens)
@classmethod
def build_decoder(cls, args, tgt_dict, embed_tokens):
return TransformerDecoder(args, tgt_dict, embed_tokens)
@classmethod
def build_model(cls, args, task):
encoder, decoder = cls.build_model_base(args, task)
return PipelineParallelTransformerModel(
encoder=encoder,
decoder=decoder,
balance=utils.eval_str_list(args.pipeline_balance, type=int),
devices=utils.eval_str_list(args.pipeline_devices, type=int),
chunks=args.pipeline_chunks,
checkpoint=args.pipeline_checkpoint,
)
def output_layer(self, features, **kwargs):
"""Project features to the default output size (typically vocabulary size)."""
return self.decoder.output_layer(features, **kwargs)
def max_positions(self):
"""Maximum length supported by the model."""
return (self.encoder_max_positions, self.decoder_max_positions)
def max_positions_helper(
self, embedding_layer, max_positions_field="max_source_positions"
):
"""Maximum input length supported by the encoder or decoder."""
if embedding_layer.embed_positions is None:
return getattr(embedding_layer, max_positions_field)
return min(
getattr(embedding_layer, max_positions_field),
embedding_layer.embed_positions.max_positions,
)
def get_normalized_probs(self, net_output, log_probs, sample=None):
"""Get normalized probabilities (or log probs) from a net's output."""
if hasattr(self, "adaptive_softmax") and self.adaptive_softmax is not None:
if sample is not None:
assert "target" in sample
target = sample["target"]
else:
target = None
out = self.adaptive_softmax.get_log_prob(net_output, target=target)
return out.exp_() if not log_probs else out
# A Pipe() module returns a tuple of tensors as the output.
# In this case, the tuple has one element - the output tensor of logits
logits = net_output if isinstance(net_output, torch.Tensor) else net_output[0]
if log_probs:
return utils.log_softmax(logits, dim=-1, onnx_trace=False)
else:
return utils.softmax(logits, dim=-1, onnx_trace=False)
def max_decoder_positions(self):
"""Maximum length supported by the decoder."""
return self.decoder_max_positions
def load_state_dict(self, state_dict, strict=True, model_cfg=None):
"""Copies parameters and buffers from *state_dict* into this module and
its descendants.
Overrides the method in :class:`nn.Module`. Compared with that method
this additionally "upgrades" *state_dicts* from old checkpoints.
"""
self.upgrade_state_dict(state_dict)
is_regular_transformer = not any("model.partitions" in k for k in state_dict)
if is_regular_transformer:
state_dict = self.convert_to_pipeline_parallel_state_dict(state_dict)
return super().load_state_dict(state_dict, strict)
def convert_to_pipeline_parallel_state_dict(self, state_dict):
new_state_dict = self.state_dict()
encoder_layer_idx = 0
decoder_layer_idx = 0
encoder_key_suffixes = [
"self_attn.k_proj.weight",
"self_attn.k_proj.bias",
"self_attn.v_proj.weight",
"self_attn.v_proj.bias",
"self_attn.q_proj.weight",
"self_attn.q_proj.bias",
"self_attn.out_proj.weight",
"self_attn.out_proj.bias",
"self_attn_layer_norm.weight",
"self_attn_layer_norm.bias",
"fc1.weight",
"fc1.bias",
"fc2.weight",
"fc2.bias",
"final_layer_norm.weight",
"final_layer_norm.bias",
]
decoder_key_suffixes = [
"self_attn.k_proj.weight",
"self_attn.k_proj.bias",
"self_attn.v_proj.weight",
"self_attn.v_proj.bias",
"self_attn.q_proj.weight",
"self_attn.q_proj.bias",
"self_attn.out_proj.weight",
"self_attn.out_proj.bias",
"self_attn_layer_norm.weight",
"self_attn_layer_norm.bias",
"encoder_attn.k_proj.weight",
"encoder_attn.k_proj.bias",
"encoder_attn.v_proj.weight",
"encoder_attn.v_proj.bias",
"encoder_attn.q_proj.weight",
"encoder_attn.q_proj.bias",
"encoder_attn.out_proj.weight",
"encoder_attn.out_proj.bias",
"encoder_attn_layer_norm.weight",
"encoder_attn_layer_norm.bias",
"fc1.weight",
"fc1.bias",
"fc2.weight",
"fc2.bias",
"final_layer_norm.weight",
"final_layer_norm.bias",
]
for pid, partition in enumerate(self.model.partitions):
logger.info(f"Begin Partition {pid}")
for mid, module in enumerate(partition):
# fmt: off
if isinstance(module, TransformerEncoderEmbedding):
new_state_dict[f'model.partitions.{pid}.{mid}.embed_tokens.weight'] = state_dict['encoder.embed_tokens.weight']
new_state_dict[f'model.partitions.{pid}.{mid}.embed_positions._float_tensor'] = state_dict['encoder.embed_positions._float_tensor']
if isinstance(module, TransformerEncoderLayer):
for suffix in encoder_key_suffixes:
new_state_dict[f'model.partitions.{pid}.{mid}.{suffix}'] = state_dict[f'encoder.layers.{encoder_layer_idx}.{suffix}']
encoder_layer_idx += 1
if isinstance(module, TransformerDecoderLayer):
for suffix in decoder_key_suffixes:
new_state_dict[f'model.partitions.{pid}.{mid}.{suffix}'] = state_dict[f'decoder.layers.{decoder_layer_idx}.{suffix}']
decoder_layer_idx += 1
if isinstance(module, TransformerEncoderLayerNorm):
if 'encoder.layer_norm.weight' in state_dict:
new_state_dict[f'model.partitions.{pid}.{mid}.layer_norm.weight'] = state_dict['encoder.layer_norm.weight']
new_state_dict[f'model.partitions.{pid}.{mid}.layer_norm.bias'] = state_dict['encoder.layer_norm.bias']
if isinstance(module, TransformerDecoderEmbedding):
new_state_dict[f'model.partitions.{pid}.{mid}.embed_tokens.weight'] = state_dict['decoder.embed_tokens.weight']
new_state_dict[f'model.partitions.{pid}.{mid}.embed_positions._float_tensor'] = state_dict['decoder.embed_positions._float_tensor']
if isinstance(module, TransformerDecoderOutputLayer):
new_state_dict[f'model.partitions.{pid}.{mid}.output_projection.weight'] = state_dict['decoder.output_projection.weight']
# fmt: on
return new_state_dict
class TransformerEncoder(FairseqEncoder):
"""
Transformer encoder consisting of *args.encoder_layers* layers. Each layer
is a :class:`TransformerEncoderLayer`.
Args:
args (argparse.Namespace): parsed command-line arguments
dictionary (~fairseq.data.Dictionary): encoding dictionary
embed_tokens (torch.nn.Embedding): input embedding
"""
def __init__(self, args, dictionary, embed_tokens, encoder_module_list=None):
super().__init__(dictionary)
self.register_buffer("version", torch.Tensor([3]))
import_pipe()
self.use_pipeline = encoder_module_list is not None
if not self.use_pipeline:
self.embedding_layer = TransformerEncoderEmbedding(args, embed_tokens)
self.encoder_layers = nn.Sequential(
*[TransformerEncoderLayer(args) for i in range(args.encoder_layers)]
)
if isinstance(embed_tokens, nn.ModuleList):
emb_dim = sum(e.embedding_dim for e in embed_tokens)
else:
emb_dim = embed_tokens.embedding_dim
self.final_layer_norm = TransformerEncoderLayerNorm(args, emb_dim)
else:
encoder_balance = utils.eval_str_list(
args.pipeline_encoder_balance, type=int
)
encoder_devices = utils.eval_str_list(
args.pipeline_encoder_devices, type=int
)
assert sum(encoder_balance) == len(encoder_module_list), (
f"Sum of encoder_balance={encoder_balance} is not equal "
+ f"to num_encoder_modules={len(encoder_module_list)}"
)
if TORCH_PIPE:
self.model = Pipe(
module=partition_model(
nn.Sequential(*encoder_module_list),
encoder_balance,
encoder_devices,
),
chunks=args.pipeline_chunks,
checkpoint=args.pipeline_checkpoint,
)
else:
self.model = Pipe(
module=nn.Sequential(*encoder_module_list),
balance=encoder_balance,
devices=encoder_devices,
chunks=args.pipeline_chunks,
checkpoint=args.pipeline_checkpoint,
)
def forward(self, src_tokens, src_lengths):
"""
Args:
input_tuple(
src_tokens (LongTensor): tokens in the source language of shape
`(batch, src_len)`
src_lengths (torch.LongTensor): lengths of each source sentence of
shape `(batch)`
)
Returns:
output_tuple(
- **encoder_out** (Tensor): the last encoder layer's output of
shape `(src_len, batch, embed_dim)`
- **encoder_padding_mask** (ByteTensor): the positions of
padding elements of shape `(batch, src_len)`
- prev_output_tokens
- **encoder_states** (List[Tensor]): all intermediate
hidden states of shape `(src_len, batch, embed_dim)`.
Only populated if *return_all_hiddens* is True.
)
"""
dummy_prev_output_tokens = torch.zeros(
1, dtype=src_tokens.dtype, device=src_tokens.device
)
input_tuple = (src_tokens, src_lengths, dummy_prev_output_tokens)
if self.use_pipeline:
input_tuple = tuple(i.to(self.model.devices[0]) for i in input_tuple)
if TORCH_PIPE:
encoder_out = self.model(input_tuple).local_value()
else:
encoder_out = self.model(input_tuple)
else:
encoder_embed_output_tuple = self.embedding_layer(input_tuple)
encoder_layers_output = self.encoder_layers(encoder_embed_output_tuple)
encoder_out = self.final_layer_norm(encoder_layers_output)
# first element is the encoder output
# second element is the encoder padding mask
# the remaining elements of EncoderOut are not computed by
# the PipelineParallelTransformer
return EncoderOut(encoder_out[0], encoder_out[1], None, None, None, None)
def reorder_encoder_out(self, encoder_out, new_order):
"""
Reorder encoder output according to *new_order*.
Args:
encoder_out: output from the ``forward()`` method
new_order (LongTensor): desired order
Returns:
*encoder_out* rearranged according to *new_order*
"""
if encoder_out.encoder_out is not None:
encoder_out = encoder_out._replace(
encoder_out=encoder_out.encoder_out.index_select(1, new_order)
)
if encoder_out.encoder_padding_mask is not None:
encoder_out = encoder_out._replace(
encoder_padding_mask=encoder_out.encoder_padding_mask.index_select(
0, new_order
)
)
if encoder_out.encoder_embedding is not None:
encoder_out = encoder_out._replace(
encoder_embedding=encoder_out.encoder_embedding.index_select(
0, new_order
)
)
if encoder_out.encoder_states is not None:
for idx, state in enumerate(encoder_out.encoder_states):
encoder_out.encoder_states[idx] = state.index_select(1, new_order)
return encoder_out
def max_positions(self):
"""Maximum input length supported by the encoder."""
if self.embedding_layer.embed_positions is None:
return self.embedding_layer.max_source_positions
return min(
self.embedding_layer.max_source_positions,
self.embedding_layer.embed_positions.max_positions,
)
class TransformerDecoder(FairseqDecoder):
"""
Transformer decoder consisting of *args.decoder_layers* layers. Each layer
is a :class:`TransformerDecoderLayer`.
Args:
args (argparse.Namespace): parsed command-line arguments
dictionary (~fairseq.data.Dictionary): decoding dictionary
embed_tokens (torch.nn.Embedding): output embedding
no_encoder_attn (bool, optional): whether to attend to encoder outputs
(default: False).
"""
def __init__(
self,
args,
dictionary,
embed_tokens,
no_encoder_attn=False,
decoder_module_list=None,
):
super().__init__(dictionary)
self.register_buffer("version", torch.Tensor([3]))
import_pipe()
self.use_pipeline = decoder_module_list is not None
if not self.use_pipeline:
self.embedding_layer = TransformerDecoderEmbedding(args, embed_tokens)
self.decoder_layers = nn.Sequential(
*[
TransformerDecoderLayer(args, no_encoder_attn)
for _ in range(args.decoder_layers)
]
)
self.decoder_output_layer = TransformerDecoderOutputLayer(
args, embed_tokens, dictionary
)
else:
decoder_balance = utils.eval_str_list(
args.pipeline_decoder_balance, type=int
)
decoder_devices = utils.eval_str_list(
args.pipeline_decoder_devices, type=int
)
assert sum(decoder_balance) == len(decoder_module_list), (
f"Sum of decoder_balance={decoder_balance} is not equal "
+ f"to num_decoder_modules={len(decoder_module_list)}"
)
if TORCH_PIPE:
self.model = Pipe(
module=partition_model(
nn.Sequential(*decoder_module_list),
decoder_balance,
decoder_devices,
),
chunks=args.pipeline_chunks,
checkpoint=args.pipeline_checkpoint,
)
else:
self.model = Pipe(
module=nn.Sequential(*decoder_module_list),
balance=decoder_balance,
devices=decoder_devices,
chunks=args.pipeline_chunks,
checkpoint=args.pipeline_checkpoint,
)
def forward(
self,
prev_output_tokens,
encoder_out=None,
):
"""
Args:
prev_output_tokens (LongTensor): previous decoder outputs of shape
`(batch, tgt_len)`, for teacher forcing
encoder_out (optional): output from the encoder, used for
encoder-side attention
incremental_state (dict): dictionary used for storing state during
:ref:`Incremental decoding`
features_only (bool, optional): only return features without
applying output layer (default: False).
Returns:
tuple:
- the decoder's output of shape `(batch, tgt_len, vocab)`
- a dictionary with any model-specific outputs
"""
input_tuple = (
encoder_out.encoder_out,
encoder_out.encoder_padding_mask,
prev_output_tokens,
)
if self.use_pipeline:
input_tuple = tuple(i.to(self.model.devices[0]) for i in input_tuple)
if TORCH_PIPE:
return (self.model(input_tuple).local_value(),)
else:
return (self.model(input_tuple),)
else:
embed_layer_output = self.embedding_layer(input_tuple)
state = self.decoder_layers(embed_layer_output)
return (self.decoder_output_layer(state),)
def output_layer(self, features, **kwargs):
"""Project features to the vocabulary size."""
if self.adaptive_softmax is None:
# project back to size of vocabulary
if self.share_input_output_embed:
return F.linear(features, self.embed_tokens.weight)
else:
return F.linear(features, self.embed_out)
else:
return features
def max_positions(self):
"""Maximum output length supported by the decoder."""
if self.embedding_layer.embed_positions is None:
return self.embedding_layer.max_target_positions
return min(
self.embedding_layer.max_target_positions,
self.embedding_layer.embed_positions.max_positions,
)
def buffered_future_mask(self, tensor):
dim = tensor.size(0)
if (
not hasattr(self, "_future_mask")
or self._future_mask is None
or self._future_mask.device != tensor.device
or self._future_mask.size(0) < dim
):
self._future_mask = torch.triu(
utils.fill_with_neg_inf(tensor.new(dim, dim)), 1
)
return self._future_mask[:dim, :dim]
def upgrade_state_dict_named(self, state_dict, name):
"""Upgrade a (possibly old) state dict for new versions of fairseq."""
if isinstance(self.embed_positions, SinusoidalPositionalEmbedding):
weights_key = "{}.embed_positions.weights".format(name)
if weights_key in state_dict:
del state_dict[weights_key]
state_dict[
"{}.embed_positions._float_tensor".format(name)
] = torch.FloatTensor(1)
for i in range(len(self.layers)):
# update layer norms
layer_norm_map = {
"0": "self_attn_layer_norm",
"1": "encoder_attn_layer_norm",
"2": "final_layer_norm",
}
for old, new in layer_norm_map.items():
for m in ("weight", "bias"):
k = "{}.layers.{}.layer_norms.{}.{}".format(name, i, old, m)
if k in state_dict:
state_dict[
"{}.layers.{}.{}.{}".format(name, i, new, m)
] = state_dict[k]
del state_dict[k]
version_key = "{}.version".format(name)
if utils.item(state_dict.get(version_key, torch.Tensor([1]))[0]) <= 2:
# earlier checkpoints did not normalize after the stack of layers
self.layer_norm = None
self.normalize = False
state_dict[version_key] = torch.Tensor([1])
return state_dict
@register_model_architecture(
"pipeline_parallel_transformer", "transformer_iwslt_de_en_pipeline_parallel"
)
def transformer_iwslt_de_en_dist(args):
transformer_iwslt_de_en(args)
@register_model_architecture(
"pipeline_parallel_transformer", "transformer_wmt_en_de_big_pipeline_parallel"
)
def transformer_wmt_en_de_big_dist(args):
transformer_wmt_en_de_big(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/pipeline_parallel_transformer/model.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from collections import namedtuple
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import options, utils
from fairseq.modules import (
AdaptiveSoftmax,
LayerNorm,
MultiheadAttention,
PositionalEmbedding,
)
EncoderOut = namedtuple(
"TransformerEncoderOut",
[
"encoder_out", # T x B x C
"encoder_padding_mask", # B x T
"encoder_embedding", # B x T x C
"encoder_states", # List[T x B x C]
],
)
class TransformerEncoderEmbedding(nn.Module):
"""Encoder Embedding + Positional Embedding"""
def __init__(self, args, embed_tokens):
super().__init__()
self.dropout = args.dropout
self.max_source_positions = args.max_source_positions
self.embed_tokens = embed_tokens
if isinstance(embed_tokens, nn.ModuleList):
self.padding_idx = embed_tokens[0].padding_idx
embed_dim = sum(e.embedding_dim for e in embed_tokens)
else:
self.padding_idx = embed_tokens.padding_idx
embed_dim = embed_tokens.embedding_dim
self.embed_scale = math.sqrt(embed_dim)
self.embed_positions = (
PositionalEmbedding(
args.max_source_positions,
embed_dim,
self.padding_idx,
learned=args.encoder_learned_pos,
)
if not args.no_token_positional_embeddings
else None
)
if getattr(args, "layernorm_embedding", False):
self.layernorm_embedding = LayerNorm(embed_dim)
else:
self.layernorm_embedding = None
def forward(self, input):
# embed tokens and positions
src_tokens = input[0]
prev_output_tokens = input[2]
if isinstance(self.embed_tokens, nn.ModuleList):
x_embed_list = []
for embed_tokens_part in self.embed_tokens:
x_embed_list.append(embed_tokens_part(src_tokens))
embedded = torch.cat(x_embed_list, dim=-1)
else:
embedded = self.embed_tokens(src_tokens)
x = embed = self.embed_scale * embedded
if self.embed_positions is not None:
x = embed + self.embed_positions(src_tokens)
if self.layernorm_embedding:
x = self.layernorm_embedding(x)
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
# compute padding mask
encoder_padding_mask = src_tokens.eq(self.padding_idx)
return (x, encoder_padding_mask, prev_output_tokens)
class TransformerEncoderLayerNorm(nn.Module):
"""
Layer norm at the the end of all encoder layers if
args.encoder_enormalize_before = True
"""
def __init__(self, args, embed_dim):
super().__init__()
if args.encoder_normalize_before:
self.layer_norm = LayerNorm(embed_dim)
else:
self.layer_norm = None
def forward(self, input):
x = input[0]
encoder_padding_mask = input[1]
prev_output_tokens = input[2]
if self.layer_norm:
x = self.layer_norm(x)
# keeping track of the incremental_state is not supported yet
return (x, encoder_padding_mask, prev_output_tokens)
class TransformerDecoderEmbedding(nn.Module):
"""Decoder Embedding + Positional Embedding"""
def __init__(self, args, embed_tokens):
super().__init__()
self.dropout = args.dropout
self.share_input_output_embed = args.share_decoder_input_output_embed
input_embed_dim = (
sum(e.embedding_dim for e in embed_tokens)
if isinstance(embed_tokens, nn.ModuleList)
else embed_tokens.embedding_dim
)
embed_dim = args.decoder_embed_dim
self.output_embed_dim = args.decoder_output_dim
padding_idx = (
embed_tokens[0].padding_idx
if isinstance(embed_tokens, nn.ModuleList)
else embed_tokens.padding_idx
)
self.max_target_positions = args.max_target_positions
self.embed_tokens = embed_tokens
self.embed_scale = math.sqrt(embed_dim) # todo: try with input_embed_dim
self.project_in_dim = (
Linear(input_embed_dim, embed_dim, bias=False)
if embed_dim != input_embed_dim
else None
)
self.embed_positions = (
PositionalEmbedding(
args.max_target_positions,
embed_dim,
padding_idx,
learned=args.decoder_learned_pos,
)
if not args.no_token_positional_embeddings
else None
)
def forward(self, input):
mt_task = False
if isinstance(input, tuple):
if len(input) == 3:
encoder_out = input[0]
encoder_padding_mask = input[1]
prev_output_tokens = input[2]
incremental_state = None # Hardcoding to avoid passing of None objects
mt_task = True
else:
# HACK for now, need to fix (TODO sidgoyal)
prev_output_tokens = input[0]
# discard "src_lengths"
encoder_out = None
encoder_padding_mask = None
incremental_state = None
else:
prev_output_tokens = input
encoder_out = None
encoder_padding_mask = None
incremental_state = None
positions = (
self.embed_positions(
prev_output_tokens,
incremental_state=incremental_state,
)
if self.embed_positions is not None
else None
)
if incremental_state is not None:
prev_output_tokens = prev_output_tokens[:, -1:]
if positions is not None:
positions = positions[:, -1:]
# embed tokens and positions
if isinstance(self.embed_tokens, nn.ModuleList):
x_embed_list = []
for embed_tokens_part in self.embed_tokens:
x_embed_list.append(embed_tokens_part(prev_output_tokens))
x = self.embed_scale * torch.cat(x_embed_list, dim=-1)
else:
x = self.embed_scale * self.embed_tokens(prev_output_tokens)
if self.project_in_dim is not None:
x = self.project_in_dim(x)
if positions is not None:
x += positions
x = F.dropout(x, p=self.dropout, training=self.training)
# B x T x C -> T x B x C
x = x.transpose(0, 1)
if mt_task:
return (x, encoder_out, encoder_padding_mask)
return x
class TransformerDecoderOutputLayer(nn.Module):
def __init__(self, args, embed_tokens, dictionary):
super().__init__()
self.share_input_output_embed = args.share_decoder_input_output_embed
self.embed_tokens = embed_tokens
self.output_embed_dim = args.decoder_output_dim
embed_dim = args.decoder_embed_dim
self.project_out_dim = (
Linear(embed_dim, self.output_embed_dim, bias=False)
if embed_dim != self.output_embed_dim and not args.tie_adaptive_weights
else None
)
self.adaptive_softmax = None
if args.adaptive_softmax_cutoff is not None:
assert not isinstance(embed_tokens, nn.ModuleList)
self.adaptive_softmax = AdaptiveSoftmax(
len(dictionary),
self.output_embed_dim,
options.eval_str_list(args.adaptive_softmax_cutoff, type=int),
dropout=args.adaptive_softmax_dropout,
adaptive_inputs=embed_tokens if args.tie_adaptive_weights else None,
factor=args.adaptive_softmax_factor,
tie_proj=args.tie_adaptive_proj,
)
elif not self.share_input_output_embed:
self.embed_tokens = nn.Parameter(
torch.Tensor(len(dictionary), self.output_embed_dim)
)
nn.init.normal_(
self.embed_tokens, mean=0, std=self.output_embed_dim ** -0.5
)
if args.decoder_normalize_before and not getattr(
args, "no_decoder_final_norm", False
):
self.layer_norm = LayerNorm(embed_dim)
else:
self.layer_norm = None
def forward(self, input, apply_final_proj=True):
if isinstance(input, tuple):
x = input[0]
else:
x = input
if self.layer_norm:
x = self.layer_norm(x)
# T x B x C -> B x T x C
x = x.transpose(0, 1)
if self.project_out_dim is not None:
x = self.project_out_dim(x)
if apply_final_proj:
x = self.output_layer(x)
return x
def output_layer(self, features, **kwargs):
"""Project features to the vocabulary size."""
if self.adaptive_softmax is None:
# project back to size of vocabulary
if self.share_input_output_embed:
if isinstance(self.embed_tokens, nn.ModuleList):
output = None
for i, emb in enumerate(self.embed_tokens):
sidx = i * emb.embedding_dim
eidx = (i + 1) * emb.embedding_dim
if output is None:
output = F.linear(features[:, :, sidx:eidx], emb.weight)
else:
output += F.linear(features[:, :, sidx:eidx], emb.weight)
return output
else:
return F.linear(features, self.embed_tokens.weight)
else:
return F.linear(features, self.embed_tokens)
else:
return features
class TransformerEncoderLayer(nn.Module):
"""Encoder layer block.
In the original paper each operation (multi-head attention or FFN) is
postprocessed with: `dropout -> add residual -> layernorm`. In the
tensor2tensor code they suggest that learning is more robust when
preprocessing each layer with layernorm and postprocessing with:
`dropout -> add residual`. We default to the approach in the paper, but the
tensor2tensor approach can be enabled by setting
*args.encoder_normalize_before* to ``True``.
Args:
args (argparse.Namespace): parsed command-line arguments
"""
def __init__(self, args):
super().__init__()
self.embed_dim = args.encoder_embed_dim
self.self_attn = MultiheadAttention(
self.embed_dim,
args.encoder_attention_heads,
dropout=args.attention_dropout,
self_attention=True,
)
self.self_attn_layer_norm = LayerNorm(self.embed_dim)
self.dropout = args.dropout
self.activation_fn = utils.get_activation_fn(
activation=getattr(args, "activation_fn", "relu")
)
self.activation_dropout = getattr(args, "activation_dropout", 0)
if self.activation_dropout == 0:
# for backwards compatibility with models that use args.relu_dropout
self.activation_dropout = getattr(args, "relu_dropout", 0)
self.normalize_before = args.encoder_normalize_before
self.fc1 = Linear(self.embed_dim, args.encoder_ffn_embed_dim)
self.fc2 = Linear(args.encoder_ffn_embed_dim, self.embed_dim)
self.final_layer_norm = LayerNorm(self.embed_dim)
def upgrade_state_dict_named(self, state_dict, name):
"""
Rename layer norm states from `...layer_norms.0.weight` to
`...self_attn_layer_norm.weight` and `...layer_norms.1.weight` to
`...final_layer_norm.weight`
"""
layer_norm_map = {"0": "self_attn_layer_norm", "1": "final_layer_norm"}
for old, new in layer_norm_map.items():
for m in ("weight", "bias"):
k = "{}.layer_norms.{}.{}".format(name, old, m)
if k in state_dict:
state_dict["{}.{}.{}".format(name, new, m)] = state_dict[k]
del state_dict[k]
def forward(self, input):
"""
Args:
input (Tuple):
input[0] (Tensor): input to the layer of shape `(seq_len, batch, embed_dim)`
input[1] (ByteTensor/FloatTensor): encoder padding mask -
binary ByteTensor of shape `(batch, src_len)` where padding elements
are indicated by ``1``.
input[2] (LongTensor): previous decoder outputs of shape
`(batch, tgt_len)`, for teacher forcing)
Returns:
output (Tuple):
output[0] (Tensor): encoded output of shape `(batch, src_len, embed_dim)`
output[1] (ByteTensor/FloatTensor): encoder padding mask
output[2] (LongTensor): previous decoder outputs
"""
x = input[0]
encoder_padding_mask = input[1]
prev_output_tokens = input[2]
residual = x
x = self.maybe_layer_norm(self.self_attn_layer_norm, x, before=True)
x, _ = self.self_attn(
query=x, key=x, value=x, key_padding_mask=encoder_padding_mask
)
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_layer_norm(self.self_attn_layer_norm, x, after=True)
residual = x
x = self.maybe_layer_norm(self.final_layer_norm, x, before=True)
x = self.activation_fn(self.fc1(x))
x = F.dropout(x, p=self.activation_dropout, training=self.training)
x = self.fc2(x)
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_layer_norm(self.final_layer_norm, x, after=True)
return (x, encoder_padding_mask, prev_output_tokens)
def maybe_layer_norm(self, layer_norm, x, before=False, after=False):
assert before ^ after
if after ^ self.normalize_before:
return layer_norm(x)
else:
return x
class TransformerDecoderLayer(nn.Module):
"""Decoder layer block.
In the original paper each operation (multi-head attention, encoder
attention or FFN) is postprocessed with: `dropout -> add residual ->
layernorm`. In the tensor2tensor code they suggest that learning is more
robust when preprocessing each layer with layernorm and postprocessing with:
`dropout -> add residual`. We default to the approach in the paper, but the
tensor2tensor approach can be enabled by setting
*args.decoder_normalize_before* to ``True``.
Args:
args (argparse.Namespace): parsed command-line arguments
no_encoder_attn (bool, optional): whether to attend to encoder outputs
(default: False).
"""
def __init__(
self, args, no_encoder_attn=False, add_bias_kv=False, add_zero_attn=False
):
super().__init__()
self.embed_dim = args.decoder_embed_dim
self.self_attn = MultiheadAttention(
embed_dim=self.embed_dim,
num_heads=args.decoder_attention_heads,
dropout=args.attention_dropout,
add_bias_kv=add_bias_kv,
add_zero_attn=add_zero_attn,
self_attention=True,
)
self.dropout = args.dropout
self.activation_fn = utils.get_activation_fn(
activation=getattr(args, "activation_fn", "relu")
)
self.activation_dropout = getattr(args, "activation_dropout", 0)
if self.activation_dropout == 0:
# for backwards compatibility with models that use args.relu_dropout
self.activation_dropout = getattr(args, "relu_dropout", 0)
self.normalize_before = args.decoder_normalize_before
# use layerNorm rather than FusedLayerNorm for exporting.
# char_inputs can be used to determint this.
# TODO remove this once we update apex with the fix
export = getattr(args, "char_inputs", False)
self.self_attn_layer_norm = LayerNorm(self.embed_dim, export=export)
if no_encoder_attn:
self.encoder_attn = None
self.encoder_attn_layer_norm = None
else:
self.encoder_attn = MultiheadAttention(
self.embed_dim,
args.decoder_attention_heads,
kdim=getattr(args, "encoder_embed_dim", None),
vdim=getattr(args, "encoder_embed_dim", None),
dropout=args.attention_dropout,
encoder_decoder_attention=True,
)
self.encoder_attn_layer_norm = LayerNorm(self.embed_dim, export=export)
self.fc1 = Linear(self.embed_dim, args.decoder_ffn_embed_dim)
self.fc2 = Linear(args.decoder_ffn_embed_dim, self.embed_dim)
self.final_layer_norm = LayerNorm(self.embed_dim, export=export)
self.need_attn = True
self.onnx_trace = False
def prepare_for_onnx_export_(self):
self.onnx_trace = True
def forward(self, input):
"""
Args:
input (Tuple):
input[0] (Tensor): input to the layer of shape `(seq_len, batch, embed_dim)`
input[1] (Tensor): encoder output of shape `(batch, src_len, embed_dim)`
input[2] (ByteTensor/FloatTensor): encoder padding mask -
binary ByteTensor of shape `(batch, src_len)` where padding elements
are indicated by ``1``.
Returns:
output (Tuple):
output[0] (Tensor): encoded output of shape `(batch, src_len, embed_dim)`
output[1] (ByteTensor/FloatTensor): encoder padding mask
output[2] (LongTensor): previous decoder outputs
"""
# Note: incremental state is not yet supported
mt_task = False
if isinstance(input, tuple):
x = input[0]
encoder_out = input[1]
encoder_padding_mask = input[2]
incremental_state = None
mt_task = True
else:
x = input
encoder_out = None
encoder_padding_mask = None
incremental_state = None
if incremental_state is None:
self_attn_mask = self.buffered_future_mask(x)
else:
self_attn_mask = None
# TODO: add back prev_self_attn_state, prev_attn_state,
# self_attn_padding_mask
prev_self_attn_state = None
prev_attn_state = None
self_attn_padding_mask = None
residual = x
x = self.maybe_layer_norm(self.self_attn_layer_norm, x, before=True)
if prev_self_attn_state is not None:
if incremental_state is None:
incremental_state = {}
prev_key, prev_value = prev_self_attn_state
saved_state = {"prev_key": prev_key, "prev_value": prev_value}
self.self_attn._set_input_buffer(incremental_state, saved_state)
x, attn = self.self_attn(
query=x,
key=x,
value=x,
key_padding_mask=self_attn_padding_mask,
incremental_state=incremental_state,
need_weights=False,
attn_mask=self_attn_mask,
)
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_layer_norm(self.self_attn_layer_norm, x, after=True)
if self.encoder_attn is not None:
residual = x
x = self.maybe_layer_norm(self.encoder_attn_layer_norm, x, before=True)
if prev_attn_state is not None:
if incremental_state is None:
incremental_state = {}
prev_key, prev_value = prev_attn_state
saved_state = {"prev_key": prev_key, "prev_value": prev_value}
self.encoder_attn._set_input_buffer(incremental_state, saved_state)
x, attn = self.encoder_attn(
query=x,
key=encoder_out,
value=encoder_out,
key_padding_mask=encoder_padding_mask,
incremental_state=incremental_state,
static_kv=True,
need_weights=(not self.training and self.need_attn),
)
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_layer_norm(self.encoder_attn_layer_norm, x, after=True)
residual = x
x = self.maybe_layer_norm(self.final_layer_norm, x, before=True)
x = self.activation_fn(self.fc1(x))
x = F.dropout(x, p=self.activation_dropout, training=self.training)
x = self.fc2(x)
x = F.dropout(x, p=self.dropout, training=self.training)
x = residual + x
x = self.maybe_layer_norm(self.final_layer_norm, x, after=True)
if mt_task:
return (x, encoder_out, encoder_padding_mask)
return x
def buffered_future_mask(self, tensor):
dim = tensor.size(0)
if (
not hasattr(self, "_future_mask")
or self._future_mask is None
or self._future_mask.device != tensor.device
):
self._future_mask = torch.triu(
utils.fill_with_neg_inf(tensor.new(dim, dim)), 1
)
if self._future_mask.size(0) < dim:
self._future_mask = torch.triu(
utils.fill_with_neg_inf(self._future_mask.resize_(dim, dim)), 1
)
return self._future_mask[:dim, :dim]
def maybe_layer_norm(self, layer_norm, x, before=False, after=False):
assert before ^ after
if after ^ self.normalize_before:
return layer_norm(x)
else:
return x
def make_generation_fast_(self, need_attn=False, **kwargs):
self.need_attn = need_attn
def Embedding(num_embeddings, embedding_dim, padding_idx):
m = nn.Embedding(num_embeddings, embedding_dim, padding_idx=padding_idx)
nn.init.normal_(m.weight, mean=0, std=embedding_dim ** -0.5)
nn.init.constant_(m.weight[padding_idx], 0)
return m
def Linear(in_features, out_features, bias=True):
m = nn.Linear(in_features, out_features, bias)
nn.init.xavier_uniform_(m.weight)
if bias:
nn.init.constant_(m.bias, 0.0)
return m
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/pipeline_parallel_transformer/layers.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .model import * # noqa
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/roberta/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
RoBERTa: A Robustly Optimized BERT Pretraining Approach.
"""
import logging
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from fairseq.model_parallel.models.transformer import ModelParallelTransformerEncoder
from fairseq.models import register_model, register_model_architecture
from fairseq.models.roberta import (
roberta_base_architecture,
roberta_prenorm_architecture,
RobertaEncoder,
RobertaModel,
)
from fairseq.modules import LayerNorm
try:
from fairseq.model_parallel.megatron.mpu import (
copy_to_model_parallel_region,
gather_from_model_parallel_region,
ColumnParallelLinear,
VocabParallelEmbedding,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
logger = logging.getLogger(__name__)
@register_model("model_parallel_roberta")
class ModelParallelRobertaModel(RobertaModel):
def __init__(self, args, encoder):
super().__init__(args, encoder)
self.classification_heads = nn.ModuleDict()
@staticmethod
def add_args(parser):
RobertaModel.add_args(parser)
parser.add_argument(
"--no-final-layer-norm",
action="store_true",
help=(
"don't add final layernorm (only applicable when "
"--encoder-normalize-before=True"
),
)
@classmethod
def build_model(cls, args, task):
"""Build a new model instance."""
# make sure all arguments are present
base_architecture(args)
task.source_dictionary.pad_to_multiple_(args.model_parallel_size * 8)
task.target_dictionary.pad_to_multiple_(args.model_parallel_size * 8)
if not hasattr(args, "max_positions"):
args.max_positions = args.tokens_per_sample
if getattr(args, "untie_weights_roberta", False):
raise NotImplementedError(
"--untie-weights-roberta is not supported in model parallel mode"
)
encoder = ModelParallelRobertaEncoder(args, task.source_dictionary)
return cls(args, encoder)
def forward(
self,
src_tokens,
features_only=False,
return_all_hiddens=False,
classification_head_name=None,
**kwargs
):
if classification_head_name is not None:
features_only = True
x, extra = self.encoder(src_tokens, features_only, return_all_hiddens, **kwargs)
if classification_head_name is not None:
x = self.classification_heads[classification_head_name](x)
return x, extra
def register_classification_head(
self, name, num_classes=None, inner_dim=None, **kwargs
):
"""Register a classification head."""
if name in self.classification_heads:
prev_num_classes = self.classification_heads[name].out_proj.out_features
prev_inner_dim = self.classification_heads[name].dense.out_features
if num_classes != prev_num_classes or inner_dim != prev_inner_dim:
logger.warning(
're-registering head "{}" with num_classes {} (prev: {}) '
"and inner_dim {} (prev: {})".format(
name, num_classes, prev_num_classes, inner_dim, prev_inner_dim
)
)
self.classification_heads[name] = ModelParallelRobertaClassificationHead(
self.args.encoder_embed_dim,
inner_dim or self.args.encoder_embed_dim,
num_classes,
self.args.pooler_activation_fn,
self.args.pooler_dropout,
)
class ModelParallelRobertaLMHead(nn.Module):
"""Head for masked language modeling."""
def __init__(self, embed_dim, output_dim, activation_fn, weight=None):
super().__init__()
self.dense = ColumnParallelLinear(embed_dim, embed_dim, gather_output=True)
self.activation_fn = utils.get_activation_fn(activation_fn)
self.layer_norm = LayerNorm(embed_dim)
if weight is None:
weight = nn.Linear(embed_dim, output_dim, bias=False).weight
self.weight = weight
self.bias = nn.Parameter(torch.zeros(output_dim))
def forward(self, features, masked_tokens=None, **kwargs):
# Only project the unmasked tokens while training,
# saves both memory and computation
if masked_tokens is not None:
features = features[masked_tokens, :]
x = self.dense(features)
x = self.activation_fn(x)
x = self.layer_norm(x)
x = copy_to_model_parallel_region(x)
# project back to size of vocabulary with bias
x = F.linear(x, self.weight)
x = gather_from_model_parallel_region(x).contiguous()
x = x + self.bias
return x
class ModelParallelRobertaClassificationHead(nn.Module):
"""Head for sentence-level classification tasks."""
def __init__(
self, input_dim, inner_dim, num_classes, activation_fn, pooler_dropout
):
super().__init__()
self.dense = ColumnParallelLinear(input_dim, inner_dim, gather_output=True)
self.activation_fn = utils.get_activation_fn(activation_fn)
self.dropout = nn.Dropout(p=pooler_dropout)
self.out_proj = nn.Linear(inner_dim, num_classes)
def forward(self, features, **kwargs):
x = features[:, 0, :] # take <s> token (equiv. to [CLS])
x = self.dropout(x)
x = self.dense(x)
x = self.activation_fn(x)
x = self.dropout(x)
x = self.out_proj(x)
return x
class ModelParallelRobertaEncoder(RobertaEncoder):
"""RoBERTa encoder."""
def __init__(self, args, dictionary):
super().__init__(args, dictionary)
assert not self.args.untie_weights_roberta
def build_embedding(self, vocab_size, embedding_dim, padding_idx):
return VocabParallelEmbedding(vocab_size, embedding_dim, padding_idx)
def build_encoder(self, args, dictionary, embed_tokens):
return ModelParallelTransformerEncoder(args, dictionary, embed_tokens)
def build_lm_head(self, embed_dim, output_dim, activation_fn, weight):
return ModelParallelRobertaLMHead(embed_dim, output_dim, activation_fn, weight)
@register_model_architecture("model_parallel_roberta", "model_parallel_roberta")
def base_architecture(args):
args.no_final_layer_norm = getattr(args, "no_final_layer_norm", False)
# model parallel RoBERTa defaults to "Pre-LN" formulation
roberta_prenorm_architecture(args)
# earlier versions of model parallel RoBERTa removed the final layer norm
@register_model_architecture("model_parallel_roberta", "model_parallel_roberta_v1")
def model_parallel_roberta_v1_architecture(args):
args.no_final_layer_norm = getattr(args, "no_final_layer_norm", True)
base_architecture(args)
@register_model_architecture(
"model_parallel_roberta", "model_parallel_roberta_postnorm"
)
def model_parallel_roberta_postnorm_architecture(args):
# the original BERT/RoBERTa uses the "Post-LN" formulation
roberta_base_architecture(args)
@register_model_architecture("model_parallel_roberta", "model_parallel_roberta_base")
def model_parallel_roberta_base_architecture(args):
base_architecture(args)
@register_model_architecture("model_parallel_roberta", "model_parallel_roberta_large")
def model_parallel_roberta_large_architecture(args):
args.encoder_layers = getattr(args, "encoder_layers", 24)
args.encoder_embed_dim = getattr(args, "encoder_embed_dim", 1024)
args.encoder_ffn_embed_dim = getattr(args, "encoder_ffn_embed_dim", 4096)
args.encoder_attention_heads = getattr(args, "encoder_attention_heads", 16)
base_architecture(args)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/models/roberta/model.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Dict, Optional, Tuple
import torch
from fairseq import utils
from fairseq.incremental_decoding_utils import with_incremental_state
from fairseq.modules.fairseq_dropout import FairseqDropout
from torch import Tensor, nn
try:
from fairseq.model_parallel.megatron.mpu import (
get_cuda_rng_tracker,
get_model_parallel_world_size,
ColumnParallelLinear,
RowParallelLinear,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
@with_incremental_state
class ModelParallelMultiheadAttention(nn.Module):
"""Model parallel Multi-headed attention.
This performs the Multi-headed attention over multiple gpus.
See "Megatron-LM: https://arxiv.org/pdf/1909.08053.pdf" for more details.
"""
def __init__(
self,
embed_dim,
num_heads,
kdim=None,
vdim=None,
dropout=0.0,
bias=True,
self_attention=False,
encoder_decoder_attention=False,
):
super().__init__()
if not has_megatron_submodule:
raise ImportError(
"\n\nPlease install the megatron submodule:"
"\n\n git submodule update --init "
"fairseq/model_parallel/megatron"
)
self.embed_dim = embed_dim
self.kdim = kdim if kdim is not None else embed_dim
self.vdim = vdim if vdim is not None else embed_dim
self.qkv_same_dim = self.kdim == embed_dim and self.vdim == embed_dim
self.model_parallel_size = get_model_parallel_world_size()
self.num_heads_partition = num_heads // self.model_parallel_size
assert (
self.num_heads_partition * self.model_parallel_size == num_heads
), "Number of heads must be divisible by model parallel size"
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.head_dim = embed_dim // num_heads
assert (
self.head_dim * num_heads == self.embed_dim
), "embed_dim must be divisible by num_heads"
self.scaling = self.head_dim ** -0.5
self.self_attention = self_attention
self.encoder_decoder_attention = encoder_decoder_attention
assert (
not self.self_attention or self.qkv_same_dim
), "Self-attention requires query, key and value to be of the same size"
self.k_proj = ColumnParallelLinear(
self.kdim, embed_dim, bias=bias, gather_output=False
)
self.v_proj = ColumnParallelLinear(
self.vdim, embed_dim, bias=bias, gather_output=False
)
self.q_proj = ColumnParallelLinear(
embed_dim, embed_dim, bias=bias, gather_output=False
)
self.out_proj = RowParallelLinear(
embed_dim, embed_dim, bias=bias, input_is_parallel=True
)
def forward(
self,
query,
key: Optional[Tensor],
value: Optional[Tensor],
key_padding_mask: Optional[Tensor] = None,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
static_kv: bool = False,
attn_mask: Optional[Tensor] = None,
**unused_kwargs,
) -> Tuple[Tensor, Optional[Tensor]]:
"""Input shape: Time x Batch x Channel
Args:
key_padding_mask (ByteTensor, optional): mask to exclude
keys that are pads, of shape `(batch, src_len)`, where
padding elements are indicated by 1s.
attn_mask (ByteTensor, optional): typically used to
implement causal attention, where the mask prevents the
attention from looking forward in time (default: None).
"""
tgt_len, bsz, embed_dim = query.size()
assert embed_dim == self.embed_dim
assert list(query.size()) == [tgt_len, bsz, embed_dim]
is_tpu = query.device.type == "xla"
if incremental_state is not None:
saved_state = self._get_input_buffer(incremental_state)
if saved_state is not None and "prev_key" in saved_state:
# previous time steps are cached - no need to recompute
# key and value if they are static
if static_kv:
assert self.encoder_decoder_attention and not self.self_attention
key = value = None
else:
saved_state = None
if self.self_attention:
q = self.q_proj(query)
k = self.k_proj(query)
v = self.v_proj(query)
elif self.encoder_decoder_attention:
# encoder-decoder attention
q = self.q_proj(query)
if key is None:
assert value is None
k = v = None
else:
k = self.k_proj(key)
v = self.v_proj(key)
else:
assert key is not None and value is not None
q = self.q_proj(query)
k = self.k_proj(key)
v = self.v_proj(value)
q *= self.scaling
q = (
q.contiguous()
.view(tgt_len, bsz * self.num_heads_partition, self.head_dim)
.transpose(0, 1)
)
if k is not None:
k = (
k.contiguous()
.view(-1, bsz * self.num_heads_partition, self.head_dim)
.transpose(0, 1)
)
if v is not None:
v = (
v.contiguous()
.view(-1, bsz * self.num_heads_partition, self.head_dim)
.transpose(0, 1)
)
if saved_state is not None:
# saved states are stored with shape (bsz, num_heads_partition, seq_len, head_dim)
if "prev_key" in saved_state:
_prev_key = saved_state["prev_key"]
assert _prev_key is not None
prev_key = _prev_key.view(
bsz * self.num_heads_partition, -1, self.head_dim
)
if static_kv:
k = prev_key
else:
assert k is not None
k = torch.cat([prev_key, k], dim=1)
if "prev_value" in saved_state:
_prev_value = saved_state["prev_value"]
assert _prev_value is not None
prev_value = _prev_value.view(
bsz * self.num_heads_partition, -1, self.head_dim
)
if static_kv:
v = prev_value
else:
assert v is not None
v = torch.cat([prev_value, v], dim=1)
prev_key_padding_mask: Optional[Tensor] = None
if "prev_key_padding_mask" in saved_state:
prev_key_padding_mask = saved_state["prev_key_padding_mask"]
assert k is not None and v is not None
key_padding_mask = (
ModelParallelMultiheadAttention._append_prev_key_padding_mask(
key_padding_mask=key_padding_mask,
prev_key_padding_mask=prev_key_padding_mask,
batch_size=bsz,
src_len=k.size(1),
static_kv=static_kv,
)
)
saved_state["prev_key"] = k.view(
bsz, self.num_heads_partition, -1, self.head_dim
)
saved_state["prev_value"] = v.view(
bsz, self.num_heads_partition, -1, self.head_dim
)
saved_state["prev_key_padding_mask"] = key_padding_mask
# In this branch incremental_state is never None
assert incremental_state is not None
incremental_state = self._set_input_buffer(incremental_state, saved_state)
assert k is not None
src_len = k.size(1)
# This is part of a workaround to get around fork/join parallelism
# not supporting Optional types.
if key_padding_mask is not None and key_padding_mask.dim() == 0:
key_padding_mask = None
if key_padding_mask is not None:
assert key_padding_mask.size(0) == bsz
assert key_padding_mask.size(1) == src_len
attn_weights = torch.bmm(q, k.transpose(1, 2))
assert list(attn_weights.size()) == [
bsz * self.num_heads_partition,
tgt_len,
src_len,
]
if attn_mask is not None:
attn_mask = attn_mask.unsqueeze(0)
attn_weights += attn_mask
if key_padding_mask is not None:
# don't attend to padding symbols
attn_weights = attn_weights.view(
bsz, self.num_heads_partition, tgt_len, src_len
)
if not is_tpu:
attn_weights = attn_weights.masked_fill(
key_padding_mask.unsqueeze(1).unsqueeze(2).to(torch.bool),
float("-inf"),
)
else:
attn_weights = attn_weights.transpose(0, 2)
attn_weights = attn_weights.masked_fill(key_padding_mask, float("-inf"))
attn_weights = attn_weights.transpose(0, 2)
attn_weights = attn_weights.view(
bsz * self.num_heads_partition, tgt_len, src_len
)
attn_weights_float = utils.softmax(attn_weights, dim=-1)
attn_weights = attn_weights_float.type_as(attn_weights)
with get_cuda_rng_tracker().fork():
attn_probs = self.dropout_module(attn_weights)
assert v is not None
attn = torch.bmm(attn_probs, v)
assert list(attn.size()) == [
bsz * self.num_heads_partition,
tgt_len,
self.head_dim,
]
embed_dim_partition = embed_dim // self.model_parallel_size
attn = attn.transpose(0, 1).contiguous().view(tgt_len, bsz, embed_dim_partition)
attn = self.out_proj(attn)
# return attn_weights None to keep the return type same as single gpu multihead attention
# This will be deprecated.
attn_weights: Optional[Tensor] = None
return attn, attn_weights
@staticmethod
def _append_prev_key_padding_mask(
key_padding_mask: Optional[Tensor],
prev_key_padding_mask: Optional[Tensor],
batch_size: int,
src_len: int,
static_kv: bool,
) -> Optional[Tensor]:
# saved key padding masks have shape (bsz, seq_len)
if prev_key_padding_mask is not None and static_kv:
new_key_padding_mask = prev_key_padding_mask
elif prev_key_padding_mask is not None and key_padding_mask is not None:
new_key_padding_mask = torch.cat(
[prev_key_padding_mask.float(), key_padding_mask.float()], dim=1
)
# During incremental decoding, as the padding token enters and
# leaves the frame, there will be a time when prev or current
# is None
elif prev_key_padding_mask is not None:
filler = torch.zeros(batch_size, src_len - prev_key_padding_mask.size(1))
if prev_key_padding_mask.is_cuda:
filler = filler.cuda()
new_key_padding_mask = torch.cat(
[prev_key_padding_mask.float(), filler.float()], dim=1
)
elif key_padding_mask is not None:
filler = torch.zeros(batch_size, src_len - key_padding_mask.size(1))
if key_padding_mask.is_cuda:
filler = filler.cuda()
new_key_padding_mask = torch.cat(
[filler.float(), key_padding_mask.float()], dim=1
)
else:
new_key_padding_mask = prev_key_padding_mask
return new_key_padding_mask
def reorder_incremental_state(
self, incremental_state: Dict[str, Dict[str, Optional[Tensor]]], new_order
):
"""Reorder buffered internal state (for incremental generation)."""
input_buffer = self._get_input_buffer(incremental_state)
if input_buffer is not None:
for k in input_buffer.keys():
if input_buffer[k] is not None:
input_buffer[k] = input_buffer[k].index_select(0, new_order)
incremental_state = self._set_input_buffer(incremental_state, input_buffer)
return incremental_state
def _get_input_buffer(
self, incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]]
) -> Dict[str, Optional[Tensor]]:
result = self.get_incremental_state(incremental_state, "attn_state")
if result is not None:
return result
else:
empty_result: Dict[str, Optional[Tensor]] = {}
return empty_result
def _set_input_buffer(
self,
incremental_state: Dict[str, Dict[str, Optional[Tensor]]],
buffer: Dict[str, Optional[Tensor]],
):
return self.set_incremental_state(incremental_state, "attn_state", buffer)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/modules/multihead_attention.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""isort:skip_file"""
from .multihead_attention import ModelParallelMultiheadAttention
from .transformer_layer import (
ModelParallelTransformerEncoderLayer,
ModelParallelTransformerDecoderLayer,
)
__all__ = [
"ModelParallelMultiheadAttention",
"ModelParallelTransformerEncoderLayer",
"ModelParallelTransformerDecoderLayer",
]
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/modules/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from fairseq.model_parallel.modules import ModelParallelMultiheadAttention
from fairseq.modules import TransformerDecoderLayer, TransformerEncoderLayer
try:
from fairseq.model_parallel.megatron.mpu import (
ColumnParallelLinear,
RowParallelLinear,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
class ModelParallelTransformerEncoderLayer(TransformerEncoderLayer):
"""Encoder layer block over multiple gpus.
See "Megatron-LM: https://arxiv.org/pdf/1909.08053.pdf" for more details.
"""
def build_fc1(self, input_dim, output_dim, q_noise, qn_block_size):
if q_noise > 0:
raise NotImplementedError
return ColumnParallelLinear(input_dim, output_dim, gather_output=False)
def build_fc2(self, input_dim, output_dim, q_noise, qn_block_size):
if q_noise > 0:
raise NotImplementedError
return RowParallelLinear(input_dim, output_dim, input_is_parallel=True)
def build_self_attention(self, embed_dim, args, **unused_kwargs):
return ModelParallelMultiheadAttention(
embed_dim,
args.encoder_attention_heads,
dropout=args.attention_dropout,
self_attention=True,
)
class ModelParallelTransformerDecoderLayer(TransformerDecoderLayer):
"""Decoder layer block.
See "Megatron-LM: https://arxiv.org/pdf/1909.08053.pdf" for more details.
"""
def build_fc1(self, input_dim, output_dim, q_noise, qn_block_size):
if q_noise > 0:
raise NotImplementedError
return ColumnParallelLinear(input_dim, output_dim, gather_output=False)
def build_fc2(self, input_dim, output_dim, q_noise, qn_block_size):
if q_noise > 0:
raise NotImplementedError
return RowParallelLinear(input_dim, output_dim, input_is_parallel=True)
def build_self_attention(self, embed_dim, args, **unused_kwargs):
return ModelParallelMultiheadAttention(
embed_dim=embed_dim,
num_heads=args.decoder_attention_heads,
dropout=args.attention_dropout,
self_attention=not getattr(args, "cross_self_attention", False),
)
def build_encoder_attention(self, embed_dim, args, **unused_kwargs):
return ModelParallelMultiheadAttention(
embed_dim=embed_dim,
num_heads=args.decoder_attention_heads,
kdim=getattr(args, "encoder_embed_dim", None),
vdim=getattr(args, "encoder_embed_dim", None),
dropout=args.attention_dropout,
encoder_decoder_attention=True,
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/modules/transformer_layer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from fairseq import metrics, utils
from fairseq.criterions import FairseqCriterion, register_criterion
try:
from fairseq.model_parallel.megatron.mpu.cross_entropy import (
vocab_parallel_cross_entropy,
)
has_megatron_submodule = True
except (ImportError, ModuleNotFoundError):
has_megatron_submodule = False
@register_criterion("vocab_parallel_cross_entropy")
class VocabParallelCrossEntropyCriterion(FairseqCriterion):
def __init__(self, task, sentence_avg):
super().__init__(task)
self.sentence_avg = sentence_avg
if not has_megatron_submodule:
raise ImportError(
"\n\nPlease install the megatron submodule:"
"\n\n git submodule update --init "
"fairseq/model_parallel/megatron"
)
def forward(self, model, sample, reduce=True):
"""Compute the loss for the given sample.
Returns a tuple with three elements:
1) the loss
2) the sample size, which is used as the denominator for the gradient
3) logging outputs to display while training
"""
net_output = model(**sample["net_input"])
target = sample["target"]
loss = vocab_parallel_cross_entropy(net_output[0].float(), target)
loss = (loss * (target != self.padding_idx)).sum()
sample_size = (
sample["target"].size(0) if self.sentence_avg else sample["ntokens"]
)
logging_output = {
"loss": utils.item(loss.data) if reduce else loss.data,
"ntokens": sample["ntokens"],
"nsentences": sample["target"].size(0),
"sample_size": sample_size,
}
return loss, sample_size, logging_output
@staticmethod
def reduce_metrics(logging_outputs) -> None:
"""Aggregate logging outputs from data parallel training."""
loss_sum = sum(log.get("loss", 0) for log in logging_outputs)
ntokens = sum(log.get("ntokens", 0) for log in logging_outputs)
sample_size = sum(log.get("sample_size", 0) for log in logging_outputs)
metrics.log_scalar(
"loss", loss_sum / sample_size / math.log(2), sample_size, round=3
)
if sample_size != ntokens:
metrics.log_scalar(
"nll_loss", loss_sum / ntokens / math.log(2), ntokens, round=3
)
metrics.log_derived(
"ppl", lambda meters: utils.get_perplexity(meters["nll_loss"].avg)
)
else:
metrics.log_derived(
"ppl", lambda meters: utils.get_perplexity(meters["loss"].avg)
)
@staticmethod
def logging_outputs_can_be_summed() -> bool:
"""
Whether the logging outputs returned by `forward` can be summed
across workers prior to calling `reduce_metrics`. Setting this
to True will improves distributed training speed.
"""
return True
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/criterions/vocab_parallel_cross_entropy.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import importlib
import os
# automatically import any Python files in the criterions/ directory
for file in sorted(os.listdir(os.path.dirname(__file__))):
if file.endswith(".py") and not file.startswith("_"):
module = file[: file.find(".py")]
importlib.import_module("fairseq.model_parallel.criterions." + module)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/model_parallel/criterions/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import ctypes
import math
import sys
from dataclasses import dataclass, field
import torch
from fairseq.dataclass import FairseqDataclass
from fairseq.scoring import BaseScorer, register_scorer
from fairseq.scoring.tokenizer import EvaluationTokenizer
class BleuStat(ctypes.Structure):
_fields_ = [
("reflen", ctypes.c_size_t),
("predlen", ctypes.c_size_t),
("match1", ctypes.c_size_t),
("count1", ctypes.c_size_t),
("match2", ctypes.c_size_t),
("count2", ctypes.c_size_t),
("match3", ctypes.c_size_t),
("count3", ctypes.c_size_t),
("match4", ctypes.c_size_t),
("count4", ctypes.c_size_t),
]
@dataclass
class SacrebleuConfig(FairseqDataclass):
sacrebleu_tokenizer: EvaluationTokenizer.ALL_TOKENIZER_TYPES = field(
default="13a", metadata={"help": "tokenizer"}
)
sacrebleu_lowercase: bool = field(
default=False, metadata={"help": "apply lowercasing"}
)
sacrebleu_char_level: bool = field(
default=False, metadata={"help": "evaluate at character level"}
)
@register_scorer("sacrebleu", dataclass=SacrebleuConfig)
class SacrebleuScorer(BaseScorer):
def __init__(self, cfg):
super(SacrebleuScorer, self).__init__(cfg)
import sacrebleu
self.sacrebleu = sacrebleu
self.tokenizer = EvaluationTokenizer(
tokenizer_type=cfg.sacrebleu_tokenizer,
lowercase=cfg.sacrebleu_lowercase,
character_tokenization=cfg.sacrebleu_char_level,
)
def add_string(self, ref, pred):
self.ref.append(self.tokenizer.tokenize(ref))
self.pred.append(self.tokenizer.tokenize(pred))
def _score(self, order=4):
if order != 4:
raise NotImplementedError
# tokenization and lowercasing are performed by self.tokenizer instead.
return self.sacrebleu.corpus_bleu(self.pred, [self.ref], tokenize="none")
def score(self, order=4):
return self._score(order).score
def result_string(self, order=4):
return self._score(order).format()
@dataclass
class BleuConfig(FairseqDataclass):
pad: int = field(default=1, metadata={"help": "padding index"})
eos: int = field(default=2, metadata={"help": "eos index"})
unk: int = field(default=3, metadata={"help": "unk index"})
@register_scorer("bleu", dataclass=BleuConfig)
class Scorer(object):
def __init__(self, cfg):
self.stat = BleuStat()
self.pad = cfg.pad
self.eos = cfg.eos
self.unk = cfg.unk
try:
from fairseq import libbleu
except ImportError as e:
sys.stderr.write(
"ERROR: missing libbleu.so. run `pip install --editable .`\n"
)
raise e
self.C = ctypes.cdll.LoadLibrary(libbleu.__file__)
self.reset()
def reset(self, one_init=False):
if one_init:
self.C.bleu_one_init(ctypes.byref(self.stat))
else:
self.C.bleu_zero_init(ctypes.byref(self.stat))
def add(self, ref, pred):
if not isinstance(ref, torch.IntTensor):
raise TypeError("ref must be a torch.IntTensor (got {})".format(type(ref)))
if not isinstance(pred, torch.IntTensor):
raise TypeError("pred must be a torch.IntTensor(got {})".format(type(pred)))
# don't match unknown words
rref = ref.clone()
assert not rref.lt(0).any()
rref[rref.eq(self.unk)] = -999
rref = rref.contiguous().view(-1)
pred = pred.contiguous().view(-1)
self.C.bleu_add(
ctypes.byref(self.stat),
ctypes.c_size_t(rref.size(0)),
ctypes.c_void_p(rref.data_ptr()),
ctypes.c_size_t(pred.size(0)),
ctypes.c_void_p(pred.data_ptr()),
ctypes.c_int(self.pad),
ctypes.c_int(self.eos),
)
def score(self, order=4):
psum = sum(
math.log(p) if p > 0 else float("-Inf") for p in self.precision()[:order]
)
return self.brevity() * math.exp(psum / order) * 100
def precision(self):
def ratio(a, b):
return a / b if b > 0 else 0
return [
ratio(self.stat.match1, self.stat.count1),
ratio(self.stat.match2, self.stat.count2),
ratio(self.stat.match3, self.stat.count3),
ratio(self.stat.match4, self.stat.count4),
]
def brevity(self):
r = self.stat.reflen / self.stat.predlen
return min(1, math.exp(1 - r))
def result_string(self, order=4):
assert order <= 4, "BLEU scores for order > 4 aren't supported"
fmt = "BLEU{} = {:2.2f}, {:2.1f}"
for _ in range(1, order):
fmt += "/{:2.1f}"
fmt += " (BP={:.3f}, ratio={:.3f}, syslen={}, reflen={})"
bleup = [p * 100 for p in self.precision()[:order]]
return fmt.format(
order,
self.score(order=order),
*bleup,
self.brevity(),
self.stat.predlen / self.stat.reflen,
self.stat.predlen,
self.stat.reflen
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/bleu.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import importlib
import os
from abc import ABC, abstractmethod
from fairseq import registry
from omegaconf import DictConfig
class BaseScorer(ABC):
def __init__(self, cfg):
self.cfg = cfg
self.ref = []
self.pred = []
def add_string(self, ref, pred):
self.ref.append(ref)
self.pred.append(pred)
@abstractmethod
def score(self) -> float:
pass
@abstractmethod
def result_string(self) -> str:
pass
_build_scorer, register_scorer, SCORER_REGISTRY, _ = registry.setup_registry(
"--scoring", default="bleu"
)
def build_scorer(choice, tgt_dict):
_choice = choice._name if isinstance(choice, DictConfig) else choice
if _choice == "bleu":
from fairseq.scoring import bleu
return bleu.Scorer(
bleu.BleuConfig(pad=tgt_dict.pad(), eos=tgt_dict.eos(), unk=tgt_dict.unk())
)
return _build_scorer(choice)
# automatically import any Python files in the current directory
for file in sorted(os.listdir(os.path.dirname(__file__))):
if file.endswith(".py") and not file.startswith("_"):
module = file[: file.find(".py")]
importlib.import_module("fairseq.scoring." + module)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from dataclasses import dataclass, field
from fairseq.dataclass import FairseqDataclass
from fairseq.scoring import BaseScorer, register_scorer
from fairseq.scoring.tokenizer import EvaluationTokenizer
@dataclass
class WerScorerConfig(FairseqDataclass):
wer_tokenizer: EvaluationTokenizer.ALL_TOKENIZER_TYPES = field(
default="none", metadata={"help": "sacreBLEU tokenizer to use for evaluation"}
)
wer_remove_punct: bool = field(
default=False, metadata={"help": "remove punctuation"}
)
wer_char_level: bool = field(
default=False, metadata={"help": "evaluate at character level"}
)
wer_lowercase: bool = field(default=False, metadata={"help": "lowercasing"})
@register_scorer("wer", dataclass=WerScorerConfig)
class WerScorer(BaseScorer):
def __init__(self, cfg):
super().__init__(cfg)
self.reset()
try:
import editdistance as ed
except ImportError:
raise ImportError("Please install editdistance to use WER scorer")
self.ed = ed
self.tokenizer = EvaluationTokenizer(
tokenizer_type=self.cfg.wer_tokenizer,
lowercase=self.cfg.wer_lowercase,
punctuation_removal=self.cfg.wer_remove_punct,
character_tokenization=self.cfg.wer_char_level,
)
def reset(self):
self.distance = 0
self.ref_length = 0
def add_string(self, ref, pred):
ref_items = self.tokenizer.tokenize(ref).split()
pred_items = self.tokenizer.tokenize(pred).split()
self.distance += self.ed.eval(ref_items, pred_items)
self.ref_length += len(ref_items)
def result_string(self):
return f"WER: {self.score():.2f}"
def score(self):
return 100.0 * self.distance / self.ref_length if self.ref_length > 0 else 0
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/wer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import unicodedata
import sacrebleu as sb
from fairseq.dataclass import ChoiceEnum
SACREBLEU_V2_ABOVE = int(sb.__version__[0]) >= 2
class EvaluationTokenizer(object):
"""A generic evaluation-time tokenizer, which leverages built-in tokenizers
in sacreBLEU (https://github.com/mjpost/sacrebleu). It additionally provides
lowercasing, punctuation removal and character tokenization, which are
applied after sacreBLEU tokenization.
Args:
tokenizer_type (str): the type of sacreBLEU tokenizer to apply.
lowercase (bool): lowercase the text.
punctuation_removal (bool): remove punctuation (based on unicode
category) from text.
character_tokenization (bool): tokenize the text to characters.
"""
SPACE = chr(32)
SPACE_ESCAPE = chr(9601)
_ALL_TOKENIZER_TYPES = (
sb.BLEU.TOKENIZERS
if SACREBLEU_V2_ABOVE
else ["none", "13a", "intl", "zh", "ja-mecab"]
)
ALL_TOKENIZER_TYPES = ChoiceEnum(_ALL_TOKENIZER_TYPES)
def __init__(
self,
tokenizer_type: str = "13a",
lowercase: bool = False,
punctuation_removal: bool = False,
character_tokenization: bool = False,
):
assert (
tokenizer_type in self._ALL_TOKENIZER_TYPES
), f"{tokenizer_type}, {self._ALL_TOKENIZER_TYPES}"
self.lowercase = lowercase
self.punctuation_removal = punctuation_removal
self.character_tokenization = character_tokenization
if SACREBLEU_V2_ABOVE:
self.tokenizer = sb.BLEU(tokenize=str(tokenizer_type)).tokenizer
else:
self.tokenizer = sb.tokenizers.TOKENIZERS[tokenizer_type]()
@classmethod
def remove_punctuation(cls, sent: str):
"""Remove punctuation based on Unicode category."""
return cls.SPACE.join(
t
for t in sent.split(cls.SPACE)
if not all(unicodedata.category(c)[0] == "P" for c in t)
)
def tokenize(self, sent: str):
tokenized = self.tokenizer(sent)
if self.punctuation_removal:
tokenized = self.remove_punctuation(tokenized)
if self.character_tokenization:
tokenized = self.SPACE.join(
list(tokenized.replace(self.SPACE, self.SPACE_ESCAPE))
)
if self.lowercase:
tokenized = tokenized.lower()
return tokenized
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/tokenizer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import numpy as np
from dataclasses import dataclass
from fairseq.dataclass import FairseqDataclass
from fairseq.scoring import BaseScorer, register_scorer
@dataclass
class MeteorScorerConfig(FairseqDataclass):
pass
@register_scorer("meteor", dataclass=MeteorScorerConfig)
class MeteorScorer(BaseScorer):
def __init__(self, args):
super(MeteorScorer, self).__init__(args)
try:
import nltk
except ImportError:
raise ImportError("Please install nltk to use METEOR scorer")
self.nltk = nltk
self.scores = []
def add_string(self, ref, pred):
self.ref.append(ref)
self.pred.append(pred)
def score(self, order=4):
self.scores = [
self.nltk.translate.meteor_score.single_meteor_score(r, p)
for r, p in zip(self.ref, self.pred)
]
return np.mean(self.scores)
def result_string(self, order=4):
return f"METEOR: {self.score():.4f}"
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/meteor.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from dataclasses import dataclass
from fairseq.dataclass import FairseqDataclass
from fairseq.scoring import BaseScorer, register_scorer
@dataclass
class ChrFScorerConfig(FairseqDataclass):
pass
@register_scorer("chrf", dataclass=ChrFScorerConfig)
class ChrFScorer(BaseScorer):
def __init__(self, args):
super(ChrFScorer, self).__init__(args)
import sacrebleu
self.sacrebleu = sacrebleu
def add_string(self, ref, pred):
self.ref.append(ref)
self.pred.append(pred)
def score(self, order=4):
return self.result_string(order).score
def result_string(self, order=4):
if order != 4:
raise NotImplementedError
return self.sacrebleu.corpus_chrf(self.pred, [self.ref]).format()
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/scoring/chrf.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import sys
from dataclasses import _MISSING_TYPE, dataclass, field
from typing import Any, List, Optional
import torch
from fairseq.dataclass.constants import (
DATASET_IMPL_CHOICES,
DDP_BACKEND_CHOICES,
DDP_COMM_HOOK_CHOICES,
GENERATION_CONSTRAINTS_CHOICES,
GENERATION_DECODING_FORMAT_CHOICES,
LOG_FORMAT_CHOICES,
PIPELINE_CHECKPOINT_CHOICES,
PRINT_ALIGNMENT_CHOICES,
ZERO_SHARDING_CHOICES,
)
from omegaconf import II, MISSING
@dataclass
class FairseqDataclass:
"""fairseq base dataclass that supported fetching attributes and metas"""
_name: Optional[str] = None
@staticmethod
def name():
return None
def _get_all_attributes(self) -> List[str]:
return [k for k in self.__dataclass_fields__.keys()]
def _get_meta(
self, attribute_name: str, meta: str, default: Optional[Any] = None
) -> Any:
return self.__dataclass_fields__[attribute_name].metadata.get(meta, default)
def _get_name(self, attribute_name: str) -> str:
return self.__dataclass_fields__[attribute_name].name
def _get_default(self, attribute_name: str) -> Any:
if hasattr(self, attribute_name):
if str(getattr(self, attribute_name)).startswith("${"):
return str(getattr(self, attribute_name))
elif str(self.__dataclass_fields__[attribute_name].default).startswith(
"${"
):
return str(self.__dataclass_fields__[attribute_name].default)
elif (
getattr(self, attribute_name)
!= self.__dataclass_fields__[attribute_name].default
):
return getattr(self, attribute_name)
f = self.__dataclass_fields__[attribute_name]
if not isinstance(f.default_factory, _MISSING_TYPE):
return f.default_factory()
return f.default
def _get_type(self, attribute_name: str) -> Any:
return self.__dataclass_fields__[attribute_name].type
def _get_help(self, attribute_name: str) -> Any:
return self._get_meta(attribute_name, "help")
def _get_argparse_const(self, attribute_name: str) -> Any:
return self._get_meta(attribute_name, "argparse_const")
def _get_argparse_alias(self, attribute_name: str) -> Any:
return self._get_meta(attribute_name, "argparse_alias")
def _get_choices(self, attribute_name: str) -> Any:
return self._get_meta(attribute_name, "choices")
@classmethod
def from_namespace(cls, args):
if isinstance(args, cls):
return args
else:
config = cls()
for k in config.__dataclass_fields__.keys():
if k.startswith("_"):
# private member, skip
continue
if hasattr(args, k):
setattr(config, k, getattr(args, k))
return config
@dataclass
class CommonConfig(FairseqDataclass):
# This is the core dataclass including common parameters shared by all different jobs. Please append your params to other dataclasses if they were
# used for a particular purpose or task, such as those dedicated for `distributed training`, `optimization`, etc.
no_progress_bar: bool = field(
default=False, metadata={"help": "disable progress bar"}
)
log_interval: int = field(
default=100,
metadata={
"help": "log progress every N batches (when progress bar is disabled)"
},
)
log_format: Optional[LOG_FORMAT_CHOICES] = field(
default=None, metadata={"help": "log format to use"}
)
log_file: Optional[str] = field(
default=None, metadata={"help": "log file to copy metrics to."}
)
tensorboard_logdir: Optional[str] = field(
default=None,
metadata={
"help": "path to save logs for tensorboard, should match --logdir "
"of running tensorboard (default: no tensorboard logging)"
},
)
wandb_project: Optional[str] = field(
default=None,
metadata={"help": "Weights and Biases project name to use for logging"},
)
azureml_logging: Optional[bool] = field(
default=False,
metadata={"help": "Log scalars to AzureML context"},
)
seed: int = field(
default=1, metadata={"help": "pseudo random number generator seed"}
)
cpu: bool = field(default=False, metadata={"help": "use CPU instead of CUDA"})
tpu: bool = field(default=False, metadata={"help": "use TPU instead of CUDA"})
bf16: bool = field(default=False, metadata={"help": "use bfloat16; implies --tpu"})
memory_efficient_bf16: bool = field(
default=False,
metadata={
"help": "use a memory-efficient version of BF16 training; implies --bf16"
},
)
fp16: bool = field(default=False, metadata={"help": "use FP16"})
memory_efficient_fp16: bool = field(
default=False,
metadata={
"help": "use a memory-efficient version of FP16 training; implies --fp16"
},
)
fp16_no_flatten_grads: bool = field(
default=False, metadata={"help": "don't flatten FP16 grads tensor"}
)
fp16_init_scale: int = field(
default=2 ** 7, metadata={"help": "default FP16 loss scale"}
)
fp16_scale_window: Optional[int] = field(
default=None,
metadata={"help": "number of updates before increasing loss scale"},
)
fp16_scale_tolerance: float = field(
default=0.0,
metadata={
"help": "pct of updates that can overflow before decreasing the loss scale"
},
)
on_cpu_convert_precision: bool = field(
default=False,
metadata={
"help": "if set, the floating point conversion to fp16/bf16 runs on CPU. "
"This reduces bus transfer time and GPU memory usage."
},
)
min_loss_scale: float = field(
default=1e-4,
metadata={
"help": "minimum FP16/AMP loss scale, after which training is stopped"
},
)
threshold_loss_scale: Optional[float] = field(
default=None, metadata={"help": "threshold FP16 loss scale from below"}
)
amp: bool = field(default=False, metadata={"help": "use automatic mixed precision"})
amp_batch_retries: int = field(
default=2,
metadata={
"help": "number of retries of same batch after reducing loss scale with AMP"
},
)
amp_init_scale: int = field(
default=2 ** 7, metadata={"help": "default AMP loss scale"}
)
amp_scale_window: Optional[int] = field(
default=None,
metadata={"help": "number of updates before increasing AMP loss scale"},
)
user_dir: Optional[str] = field(
default=None,
metadata={
"help": "path to a python module containing custom extensions (tasks and/or architectures)"
},
)
empty_cache_freq: int = field(
default=0,
metadata={"help": "how often to clear the PyTorch CUDA cache (0 to disable)"},
)
all_gather_list_size: int = field(
default=16384,
metadata={"help": "number of bytes reserved for gathering stats from workers"},
)
model_parallel_size: int = field(
default=1, metadata={"help": "total number of GPUs to parallelize model over"}
)
quantization_config_path: Optional[str] = field(
default=None, metadata={"help": "path to quantization config file"}
)
profile: bool = field(
default=False, metadata={"help": "enable autograd profiler emit_nvtx"}
)
reset_logging: bool = field(
default=False,
metadata={
"help": "when using Hydra, reset the logging at the beginning of training"
},
)
suppress_crashes: bool = field(
default=False,
metadata={
"help": "suppress crashes when training with the hydra_train entry point so that the "
"main method can return a value (useful for sweeps)"
},
)
use_plasma_view: bool = field(
default=False, metadata={"help": "Store indices and sizes in shared memory"}
)
plasma_path: Optional[str] = field(
default="/tmp/plasma",
metadata={
"help": "path to run plasma_store, defaults to /tmp/plasma. Paths outside /tmp tend to fail."
},
)
deepspeed: bool = field(
default=False,
metadata={"help": "use deepspeed instead of fairseq for training"},
)
zero: int = field(
default=0,
metadata={"help": "use deepspeed zero stage 1 or 2 instead of fairseq for training"},
)
exit_interval: int = field(
default=0,
metadata={"help": "exit after this many seconds"},
)
@dataclass
class DistributedTrainingConfig(FairseqDataclass):
distributed_world_size: int = field(
default=max(1, torch.cuda.device_count()),
metadata={
"help": "total number of GPUs across all nodes (default: all visible GPUs)"
},
)
distributed_num_procs: Optional[int] = field(
default=max(1, torch.cuda.device_count()),
metadata={
"help": "total number of processes to fork (default: all visible GPUs)"
},
)
distributed_rank: Optional[int] = field(
default=0, metadata={"help": "rank of the current worker"}
)
distributed_backend: str = field(
default="nccl", metadata={"help": "distributed backend"}
)
distributed_init_method: Optional[str] = field(
default=None,
metadata={
"help": "typically tcp://hostname:port that will be used to "
"establish initial connetion"
},
)
distributed_port: int = field(
default=-1,
metadata={
"help": "port number (not required if using --distributed-init-method)"
},
)
device_id: int = field(
default=0,
metadata={
"help": "which GPU to use (usually configured automatically)",
"argparse_alias": "--local_rank",
},
)
distributed_no_spawn: bool = field(
default=False,
metadata={
"help": "do not spawn multiple processes even if multiple GPUs are visible"
},
)
ddp_backend: DDP_BACKEND_CHOICES = field(
default="pytorch_ddp", metadata={"help": "DistributedDataParallel backend"}
)
ddp_comm_hook: DDP_COMM_HOOK_CHOICES = field(
default="none", metadata={"help": "communication hook"}
)
bucket_cap_mb: int = field(
default=25, metadata={"help": "bucket size for reduction"}
)
fix_batches_to_gpus: bool = field(
default=False,
metadata={
"help": "don't shuffle batches between GPUs; this reduces overall "
"randomness and may affect precision but avoids the cost of re-reading the data"
},
)
find_unused_parameters: bool = field(
default=False,
metadata={
"help": "disable unused parameter detection (not applicable to "
"--ddp-backend=legacy_ddp)"
},
)
gradient_as_bucket_view: bool = field(
default=False,
metadata={
"help": "when set to True, gradients will be views pointing to different offsets of allreduce communication buckets. This can reduce peak memory usage, where the saved memory size will be equal to the total gradients size. "
"--gradient-as-bucket-view=gradient_as_bucket_view)"
},
)
fast_stat_sync: bool = field(
default=False,
metadata={"help": "[deprecated] this is now defined per Criterion"},
)
heartbeat_timeout: int = field(
default=-1,
metadata={
"help": "kill the job if no progress is made in N seconds; "
"set to -1 to disable"
},
)
broadcast_buffers: bool = field(
default=False,
metadata={
"help": "Copy non-trainable parameters between GPUs, such as "
"batchnorm population statistics"
},
)
slowmo_momentum: Optional[float] = field(
default=None,
metadata={
"help": "SlowMo momentum term; by default use 0.0 for 16 GPUs, "
"0.2 for 32 GPUs; 0.5 for 64 GPUs, 0.6 for > 64 GPUs"
},
)
slowmo_base_algorithm: str = field(
default="localsgd",
metadata={
"help": "Base algorithm. Either 'localsgd' or 'sgp'. Please refer "
"to the documentation of 'slowmo_base_algorithm' parameter in "
"https://fairscale.readthedocs.io/en/latest/api/experimental/nn/slowmo_ddp.html "
"for more details"
},
)
localsgd_frequency: int = field(
default=3, metadata={"help": "Local SGD allreduce frequency"}
)
nprocs_per_node: int = field(
default=max(1, torch.cuda.device_count()),
metadata={
"help": "number of GPUs in each node. An allreduce operation across GPUs in "
"a node is very fast. Hence, we do allreduce across GPUs in a node, "
"and gossip across different nodes"
},
)
pipeline_model_parallel: bool = field(
default=False,
metadata={"help": "if set, use pipeline model parallelism across GPUs"},
)
pipeline_balance: Optional[str] = field(
default=None,
metadata={
"help": "partition the model into N_K pieces, where each piece "
"contains N_i layers. The sum(args.pipeline_balance) "
"should equal the total number of layers in the model"
},
)
pipeline_devices: Optional[str] = field(
default=None,
metadata={
"help": "a list of device indices indicating which device to place "
"each of the N_K partitions. The length of this list should "
"equal the length of the --pipeline-balance argument"
},
)
pipeline_chunks: Optional[int] = field(
default=0, metadata={"help": "microbatch count for pipeline model parallelism"}
)
pipeline_encoder_balance: Optional[str] = field(
default=None,
metadata={
"help": "partition the pipeline parallel encoder into N_K pieces, where each piece "
"contains N_i layers. The sum(args.pipeline_encoder_balance) "
"should equal the total number of encoder layers in the model"
},
)
pipeline_encoder_devices: Optional[str] = field(
default=None,
metadata={
"help": "a list of device indices indicating which device to place "
"each of the N_K partitions. The length of this list should "
"equal the length of the --pipeline-encoder-balance argument"
},
)
pipeline_decoder_balance: Optional[str] = field(
default=None,
metadata={
"help": "partition the pipeline parallel decoder into N_K pieces, where each piece "
"contains N_i layers. The sum(args.pipeline_decoder_balance) "
"should equal the total number of decoder layers in the model"
},
)
pipeline_decoder_devices: Optional[str] = field(
default=None,
metadata={
"help": "a list of device indices indicating which device to place "
"each of the N_K partitions. The length of this list should "
"equal the length of the --pipeline-decoder-balance argument"
},
)
pipeline_checkpoint: PIPELINE_CHECKPOINT_CHOICES = field(
default="never",
metadata={"help": "checkpointing mode for pipeline model parallelism"},
)
zero_sharding: ZERO_SHARDING_CHOICES = field(
default="none", metadata={"help": "ZeRO sharding"}
)
fp16: bool = II("common.fp16")
memory_efficient_fp16: bool = II("common.memory_efficient_fp16")
tpu: bool = II("common.tpu")
# configuration for --ddp-backend=fully_sharded
no_reshard_after_forward: bool = field(
default=False,
metadata={"help": "don't reshard parameters after forward pass"},
)
fp32_reduce_scatter: bool = field(
default=False,
metadata={"help": "reduce-scatter grads in FP32"},
)
cpu_offload: bool = field(
default=False, metadata={"help": "offload FP32 params to CPU"}
)
use_sharded_state: bool = field(
default=False,
metadata={"help": "use sharded checkpoint files"},
)
not_fsdp_flatten_parameters: bool = field(
default=False,
metadata={"help": "not flatten parameter param for fsdp"},
)
# group.add_argument('--deepspeed', nargs='?', const=True, default=False,
# help="Enable DeepSpeed with auto-generated config with flag and " \
# "no argument, or pass an argument to a ds_config json to use.")
# group.add_argument("--zero", default=0, type=int, help="enable a specific ZeRO stage")
# group.add_argument('--exit-interval', type=int, default=None,
# help='Exit the program after the iteration is divisible '
# 'by this value.')
@dataclass
class DatasetConfig(FairseqDataclass):
num_workers: int = field(
default=1, metadata={"help": "how many subprocesses to use for data loading"}
)
skip_invalid_size_inputs_valid_test: bool = field(
default=False,
metadata={"help": "ignore too long or too short lines in valid and test set"},
)
max_tokens: Optional[int] = field(
default=None, metadata={"help": "maximum number of tokens in a batch"}
)
batch_size: Optional[int] = field(
default=None,
metadata={
"help": "number of examples in a batch",
"argparse_alias": "--max-sentences",
},
)
required_batch_size_multiple: int = field(
default=8, metadata={"help": "batch size will be a multiplier of this value"}
)
required_seq_len_multiple: int = field(
default=1,
metadata={
"help": "maximum sequence length in batch will be a multiplier of this value"
},
)
dataset_impl: Optional[DATASET_IMPL_CHOICES] = field(
default=None, metadata={"help": "output dataset implementation"}
)
data_buffer_size: int = field(
default=10, metadata={"help": "Number of batches to preload"}
)
train_subset: str = field(
default="train",
metadata={"help": "data subset to use for training (e.g. train, valid, test)"},
)
valid_subset: str = field(
default="valid",
metadata={
"help": "comma separated list of data subsets to use for validation"
" (e.g. train, valid, test)"
},
)
combine_valid_subsets: Optional[bool] = field(
default=None,
metadata={
"help": "comma separated list of data subsets to use for validation"
" (e.g. train, valid, test)",
"argparse_alias": "--combine-val",
},
)
ignore_unused_valid_subsets: Optional[bool] = field(
default=False,
metadata={"help": "do not raise error if valid subsets are ignored"},
)
validate_interval: int = field(
default=1, metadata={"help": "validate every N epochs"}
)
validate_interval_updates: int = field(
default=0, metadata={"help": "validate every N updates"}
)
validate_after_updates: int = field(
default=0, metadata={"help": "dont validate until reaching this many updates"}
)
fixed_validation_seed: Optional[int] = field(
default=None, metadata={"help": "specified random seed for validation"}
)
disable_validation: bool = field(
default=False, metadata={"help": "disable validation"}
)
max_tokens_valid: Optional[int] = field(
default=II("dataset.max_tokens"),
metadata={
"help": "maximum number of tokens in a validation batch"
" (defaults to --max-tokens)"
},
)
batch_size_valid: Optional[int] = field(
default=II("dataset.batch_size"),
metadata={
"help": "batch size of the validation batch (defaults to --batch-size)",
"argparse_alias": "--max-sentences-valid",
},
)
max_valid_steps: Optional[int] = field(
default=None,
metadata={"help": "How many batches to evaluate", "argparse_alias": "--nval"},
)
curriculum: int = field(
default=0, metadata={"help": "don't shuffle batches for first N epochs"}
)
gen_subset: str = field(
default="test",
metadata={"help": "data subset to generate (train, valid, test)"},
)
num_shards: int = field(
default=1, metadata={"help": "shard generation over N shards"}
)
shard_id: int = field(
default=0, metadata={"help": "id of the shard to generate (id < num_shards)"}
)
grouped_shuffling: bool = field(
default=False,
metadata={
"help": "shuffle batches in groups of num_shards to enable similar sequence lengths on each GPU worker when batches are sorted by length",
},
)
update_epoch_batch_itr: bool = field(
default=II("dataset.grouped_shuffling"),
metadata={
"help": "if true then prevents the reuse the epoch batch iterator by setting can_reuse_epoch_itr to false, defaults to --grouped-shuffling )",
},
)
update_ordered_indices_seed: bool = field(
default=False,
metadata={
"help": "if true then increment seed with epoch for getting batch iterators, defautls to False.",
},
)
@dataclass
class OptimizationConfig(FairseqDataclass):
max_epoch: int = field(
default=0, metadata={"help": "force stop training at specified epoch"}
)
max_update: int = field(
default=0, metadata={"help": "force stop training at specified update"}
)
stop_time_hours: float = field(
default=0,
metadata={
"help": "force stop training after specified cumulative time (if >0)"
},
)
clip_norm: float = field(
default=0.0, metadata={"help": "clip threshold of gradients"}
)
sentence_avg: bool = field(
default=False,
metadata={
"help": "normalize gradients by the number of sentences in a batch"
" (default is to normalize by number of tokens)"
},
)
update_freq: List[int] = field(
default_factory=lambda: [1],
metadata={"help": "update parameters every N_i batches, when in epoch i"},
)
lr: List[float] = field(
default_factory=lambda: [0.25],
metadata={
"help": "learning rate for the first N epochs; all epochs >N using LR_N"
" (note: this may be interpreted differently depending on --lr-scheduler)"
},
)
stop_min_lr: float = field(
default=-1.0,
metadata={"help": "stop training when the learning rate reaches this minimum"},
)
use_bmuf: bool = field(
default=False,
metadata={
"help": "specify global optimizer for syncing models on different GPUs/shards"
},
)
skip_remainder_batch: Optional[bool] = field(
default=False,
metadata={
"help": "if set, include the last (partial) batch of each epoch in training"
" (default is to skip it)."
},
)
@dataclass
class CheckpointConfig(FairseqDataclass):
save_dir: str = field(
default="checkpoints", metadata={"help": "path to save checkpoints"}
)
restore_file: str = field(
default="checkpoint_last.pt",
metadata={
"help": "filename from which to load checkpoint "
"(default: <save-dir>/checkpoint_last.pt"
},
)
continue_once: Optional[str] = field(
default=None,
metadata={
"help": "continues from this checkpoint, unless a checkpoint indicated in 'restore_file' option is present"
},
)
finetune_from_model: Optional[str] = field(
default=None,
metadata={
"help": "finetune from a pretrained model; note that meters and lr scheduler will be reset"
},
)
reset_dataloader: bool = field(
default=False,
metadata={
"help": "if set, does not reload dataloader state from the checkpoint"
},
)
reset_lr_scheduler: bool = field(
default=False,
metadata={
"help": "if set, does not load lr scheduler state from the checkpoint"
},
)
reset_meters: bool = field(
default=False,
metadata={"help": "if set, does not load meters from the checkpoint"},
)
reset_optimizer: bool = field(
default=False,
metadata={"help": "if set, does not load optimizer state from the checkpoint"},
)
optimizer_overrides: str = field(
default="{}",
metadata={
"help": "a dictionary used to override optimizer args when loading a checkpoint"
},
)
save_interval: int = field(
default=1, metadata={"help": "save a checkpoint every N epochs"}
)
save_interval_updates: int = field(
default=0, metadata={"help": "save a checkpoint (and validate) every N updates"}
)
keep_interval_updates: int = field(
default=-1,
metadata={
"help": "keep the last N checkpoints saved with --save-interval-updates"
},
)
keep_interval_updates_pattern: int = field(
default=-1,
metadata={
"help": "when used with --keep-interval-updates, skips deleting "
"any checkpoints with update X where "
"X %% keep_interval_updates_pattern == 0"
},
)
keep_last_epochs: int = field(
default=-1, metadata={"help": "keep last N epoch checkpoints"}
)
keep_best_checkpoints: int = field(
default=-1, metadata={"help": "keep best N checkpoints based on scores"}
)
no_save: bool = field(
default=False, metadata={"help": "don't save models or checkpoints"}
)
no_epoch_checkpoints: bool = field(
default=False, metadata={"help": "only store last and best checkpoints"}
)
no_last_checkpoints: bool = field(
default=False, metadata={"help": "don't store last checkpoints"}
)
no_save_optimizer_state: bool = field(
default=False,
metadata={"help": "don't save optimizer-state as part of checkpoint"},
)
best_checkpoint_metric: str = field(
default="loss", metadata={"help": 'metric to use for saving "best" checkpoints'}
)
maximize_best_checkpoint_metric: bool = field(
default=False,
metadata={
"help": 'select the largest metric value for saving "best" checkpoints'
},
)
patience: int = field(
default=-1,
metadata={
"help": (
"early stop training if valid performance doesn't "
"improve for N consecutive validation runs; note "
"that this is influenced by --validate-interval"
)
},
)
checkpoint_suffix: str = field(
default="", metadata={"help": "suffix to add to the checkpoint file name"}
)
checkpoint_shard_count: int = field(
default=1,
metadata={
"help": "Number of shards containing the checkpoint - "
"if the checkpoint is over 300GB, it is preferable "
"to split it into shards to prevent OOM on CPU while loading "
"the checkpoint"
},
)
load_checkpoint_on_all_dp_ranks: bool = field(
default=False,
metadata={
"help": "load checkpoints on all data parallel devices "
"(default: only load on rank 0 and broadcast to other devices)"
},
)
write_checkpoints_asynchronously: bool = field(
default=False,
metadata={
"help": (
"Write checkpoints asynchronously in a separate "
"thread. NOTE: This feature is currently being tested."
),
"argparse_alias": "--save-async",
},
)
model_parallel_size: int = II("common.model_parallel_size")
@dataclass
class FairseqBMUFConfig(FairseqDataclass):
block_lr: float = field(
default=1, metadata={"help": "block learning rate for bmuf"}
)
block_momentum: float = field(
default=0.875, metadata={"help": "block momentum for bmuf"}
)
global_sync_iter: int = field(
default=50, metadata={"help": "Iteration for syncing global model"}
)
warmup_iterations: int = field(
default=500, metadata={"help": "warmup iterations for model to broadcast"}
)
use_nbm: bool = field(
default=False,
metadata={"help": "Specify whether you want to use classical BM / Nesterov BM"},
)
average_sync: bool = field(
default=False,
metadata={
"help": "Specify whether you want to average the local momentum after each sync"
},
)
distributed_world_size: int = II("distributed_training.distributed_world_size")
@dataclass
class GenerationConfig(FairseqDataclass):
beam: int = field(
default=5,
metadata={"help": "beam size"},
)
nbest: int = field(
default=1,
metadata={"help": "number of hypotheses to output"},
)
max_len_a: float = field(
default=0,
metadata={
"help": "generate sequences of maximum length ax + b, where x is the source length"
},
)
max_len_b: int = field(
default=200,
metadata={
"help": "generate sequences of maximum length ax + b, where x is the source length"
},
)
min_len: int = field(
default=1,
metadata={"help": "minimum generation length"},
)
match_source_len: bool = field(
default=False,
metadata={"help": "generations should match the source length"},
)
unnormalized: bool = field(
default=False,
metadata={"help": "compare unnormalized hypothesis scores"},
)
no_early_stop: bool = field(
default=False,
metadata={"help": "deprecated"},
)
no_beamable_mm: bool = field(
default=False,
metadata={"help": "don't use BeamableMM in attention layers"},
)
lenpen: float = field(
default=1,
metadata={
"help": "length penalty: <1.0 favors shorter, >1.0 favors longer sentences"
},
)
unkpen: float = field(
default=0,
metadata={
"help": "unknown word penalty: <0 produces more unks, >0 produces fewer"
},
)
replace_unk: Optional[str] = field(
default=None,
metadata={
"help": "perform unknown replacement (optionally with alignment dictionary)",
"argparse_const": "@@ ",
},
)
sacrebleu: bool = field(
default=False,
metadata={"help": "score with sacrebleu"},
)
score_reference: bool = field(
default=False,
metadata={"help": "just score the reference translation"},
)
prefix_size: int = field(
default=0,
metadata={"help": "initialize generation by target prefix of given length"},
)
no_repeat_ngram_size: int = field(
default=0,
metadata={
"help": "ngram blocking such that this size ngram cannot be repeated in the generation"
},
)
sampling: bool = field(
default=False,
metadata={"help": "sample hypotheses instead of using beam search"},
)
sampling_topk: int = field(
default=-1,
metadata={"help": "sample from top K likely next words instead of all words"},
)
sampling_topp: float = field(
default=-1.0,
metadata={
"help": "sample from the smallest set whose cumulative probability mass exceeds p for next words"
},
)
constraints: Optional[GENERATION_CONSTRAINTS_CHOICES] = field(
default=None,
metadata={
"help": "enables lexically constrained decoding",
"argparse_const": "ordered",
},
)
temperature: float = field(
default=1.0,
metadata={"help": "temperature for generation"},
)
diverse_beam_groups: int = field(
default=-1,
metadata={"help": "number of groups for Diverse Beam Search"},
)
diverse_beam_strength: float = field(
default=0.5,
metadata={"help": "strength of diversity penalty for Diverse Beam Search"},
)
diversity_rate: float = field(
default=-1.0,
metadata={"help": "strength of diversity penalty for Diverse Siblings Search"},
)
print_alignment: Optional[PRINT_ALIGNMENT_CHOICES] = field(
default=None,
metadata={
"help": "if set, uses attention feedback to compute and print alignment to source tokens "
"(valid options are: hard, soft, otherwise treated as hard alignment)",
"argparse_const": "hard",
},
)
print_step: bool = field(
default=False,
metadata={"help": "print steps"},
)
lm_path: Optional[str] = field(
default=None,
metadata={"help": "path to lm checkpoint for lm fusion"},
)
lm_weight: float = field(
default=0.0,
metadata={"help": "weight for lm probs for lm fusion"},
)
# arguments for iterative refinement generator
iter_decode_eos_penalty: float = field(
default=0.0,
metadata={"help": "if > 0.0, it penalized early-stopping in decoding."},
)
iter_decode_max_iter: int = field(
default=10,
metadata={"help": "maximum iterations for iterative refinement."},
)
iter_decode_force_max_iter: bool = field(
default=False,
metadata={
"help": "if set, run exact the maximum number of iterations without early stop"
},
)
iter_decode_with_beam: int = field(
default=1,
metadata={
"help": "if > 1, model will generate translations varying by the lengths."
},
)
iter_decode_with_external_reranker: bool = field(
default=False,
metadata={
"help": "if set, the last checkpoint are assumed to be a reranker to rescore the translations"
},
)
retain_iter_history: bool = field(
default=False,
metadata={
"help": "if set, decoding returns the whole history of iterative refinement"
},
)
retain_dropout: bool = field(
default=False,
metadata={"help": "Use dropout at inference time"},
)
# temporarily set to Any until https://github.com/facebookresearch/hydra/issues/1117 is fixed
# retain_dropout_modules: Optional[List[str]] = field(
retain_dropout_modules: Any = field(
default=None,
metadata={
"help": "if set, only retain dropout for the specified modules; "
"if not set, then dropout will be retained for all modules"
},
)
# special decoding format for advanced decoding.
decoding_format: Optional[GENERATION_DECODING_FORMAT_CHOICES] = field(
default=None,
metadata={"help": "special decoding format for advanced decoding."},
)
no_seed_provided: bool = field(
default=False,
metadata={"help": "if set, dont use seed for initializing random generators"},
)
@dataclass
class CommonEvalConfig(FairseqDataclass):
path: Optional[str] = field(
default=None,
metadata={"help": "path(s) to model file(s), colon separated"},
)
post_process: Optional[str] = field(
default=None,
metadata={
"help": (
"post-process text by removing BPE, letter segmentation, etc. "
"Valid options can be found in fairseq.data.utils.post_process."
),
"argparse_const": "subword_nmt",
"argparse_alias": "--remove-bpe",
},
)
quiet: bool = field(default=False, metadata={"help": "only print final scores"})
model_overrides: str = field(
default="{}",
metadata={
"help": "a dictionary used to override model args at generation that were used during model training"
},
)
results_path: Optional[str] = field(
default=None, metadata={"help": "path to save eval results (optional)"}
)
@dataclass
class EvalLMConfig(FairseqDataclass):
output_word_probs: bool = field(
default=False,
metadata={
"help": "if set, outputs words and their predicted log probabilities to standard output"
},
)
output_word_stats: bool = field(
default=False,
metadata={
"help": "if set, outputs word statistics such as word count, average probability, etc"
},
)
context_window: int = field(
default=0,
metadata={
"help": "ensures that every evaluated token has access to a context of at least this size, if possible"
},
)
softmax_batch: int = field(
default=sys.maxsize,
metadata={
"help": "if BxT is more than this, will batch the softmax over vocab to this amount of tokens, in order to fit into GPU memory"
},
)
@dataclass
class InteractiveConfig(FairseqDataclass):
buffer_size: int = field(
default=0,
metadata={
"help": "read this many sentences into a buffer before processing them"
},
)
input: str = field(
default="-",
metadata={"help": "file to read from; use - for stdin"},
)
@dataclass
class EMAConfig(FairseqDataclass):
store_ema: bool = field(
default=False, metadata={help: "store exponential moving average shadow model"}
)
ema_decay: float = field(
default=0.9999, metadata={"help": "decay for exponential moving average model"}
)
ema_start_update: int = field(
default=0, metadata={"help": "start EMA update after this many model updates"}
)
ema_seed_model: Optional[str] = field(
default=None,
metadata={
"help": "Seed to load EMA model from. "
"Used to load EMA model separately from the actual model."
},
)
ema_update_freq: int = field(
default=1, metadata={"help": "Do EMA update every this many model updates"}
)
ema_fp32: bool = field(
default=False,
metadata={"help": "If true, store EMA model in fp32 even if model is in fp16"},
)
@dataclass
class FairseqConfig(FairseqDataclass):
common: CommonConfig = CommonConfig()
common_eval: CommonEvalConfig = CommonEvalConfig()
distributed_training: DistributedTrainingConfig = DistributedTrainingConfig()
dataset: DatasetConfig = DatasetConfig()
optimization: OptimizationConfig = OptimizationConfig()
checkpoint: CheckpointConfig = CheckpointConfig()
bmuf: FairseqBMUFConfig = FairseqBMUFConfig()
generation: GenerationConfig = GenerationConfig()
eval_lm: EvalLMConfig = EvalLMConfig()
interactive: InteractiveConfig = InteractiveConfig()
model: Any = MISSING
task: Any = None
criterion: Any = None
optimizer: Any = None
lr_scheduler: Any = None
scoring: Any = None
bpe: Any = None
tokenizer: Any = None
ema: EMAConfig = EMAConfig()
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/dataclass/configs.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""isort:skip_file"""
import logging
from hydra.core.config_store import ConfigStore
from fairseq.dataclass.configs import FairseqConfig
from omegaconf import DictConfig, OmegaConf
logger = logging.getLogger(__name__)
def hydra_init(cfg_name="config") -> None:
cs = ConfigStore.instance()
cs.store(name=f"{cfg_name}", node=FairseqConfig)
for k in FairseqConfig.__dataclass_fields__:
v = FairseqConfig.__dataclass_fields__[k].default
try:
cs.store(name=k, node=v)
except BaseException:
logger.error(f"{k} - {v}")
raise
def add_defaults(cfg: DictConfig) -> None:
"""This function adds default values that are stored in dataclasses that hydra doesn't know about"""
from fairseq.registry import REGISTRIES
from fairseq.tasks import TASK_DATACLASS_REGISTRY
from fairseq.models import ARCH_MODEL_NAME_REGISTRY, MODEL_DATACLASS_REGISTRY
from fairseq.dataclass.utils import merge_with_parent
from typing import Any
OmegaConf.set_struct(cfg, False)
for k, v in FairseqConfig.__dataclass_fields__.items():
field_cfg = cfg.get(k)
if field_cfg is not None and v.type == Any:
dc = None
if isinstance(field_cfg, str):
field_cfg = DictConfig({"_name": field_cfg})
field_cfg.__dict__["_parent"] = field_cfg.__dict__["_parent"]
name = getattr(field_cfg, "_name", None)
if k == "task":
dc = TASK_DATACLASS_REGISTRY.get(name)
elif k == "model":
name = ARCH_MODEL_NAME_REGISTRY.get(name, name)
dc = MODEL_DATACLASS_REGISTRY.get(name)
elif k in REGISTRIES:
dc = REGISTRIES[k]["dataclass_registry"].get(name)
if dc is not None:
cfg[k] = merge_with_parent(dc, field_cfg)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/dataclass/initialize.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from enum import Enum, EnumMeta
from typing import List
class StrEnumMeta(EnumMeta):
# this is workaround for submitit pickling leading to instance checks failing in hydra for StrEnum, see
# https://github.com/facebookresearch/hydra/issues/1156
@classmethod
def __instancecheck__(cls, other):
return "enum" in str(type(other))
class StrEnum(Enum, metaclass=StrEnumMeta):
def __str__(self):
return self.value
def __eq__(self, other: str):
return self.value == other
def __repr__(self):
return self.value
def __hash__(self):
return hash(str(self))
def ChoiceEnum(choices: List[str]):
"""return the Enum class used to enforce list of choices"""
return StrEnum("Choices", {k: k for k in choices})
LOG_FORMAT_CHOICES = ChoiceEnum(["json", "none", "simple", "tqdm"])
DDP_BACKEND_CHOICES = ChoiceEnum(
[
"c10d", # alias for pytorch_ddp
"fully_sharded", # FullyShardedDataParallel from fairscale
"legacy_ddp",
"no_c10d", # alias for legacy_ddp
"pytorch_ddp",
"slowmo",
]
)
DDP_COMM_HOOK_CHOICES = ChoiceEnum(["none", "fp16"])
DATASET_IMPL_CHOICES = ChoiceEnum(["raw", "lazy", "cached", "mmap", "fasta", "huffman"])
GENERATION_CONSTRAINTS_CHOICES = ChoiceEnum(["ordered", "unordered"])
GENERATION_DECODING_FORMAT_CHOICES = ChoiceEnum(
["unigram", "ensemble", "vote", "dp", "bs"]
)
ZERO_SHARDING_CHOICES = ChoiceEnum(["none", "os"])
PIPELINE_CHECKPOINT_CHOICES = ChoiceEnum(["always", "never", "except_last"])
PRINT_ALIGNMENT_CHOICES = ChoiceEnum(["hard", "soft"])
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/dataclass/constants.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from .configs import FairseqDataclass
from .constants import ChoiceEnum
__all__ = [
"FairseqDataclass",
"ChoiceEnum",
]
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/dataclass/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import ast
import inspect
import logging
import os
import re
from argparse import ArgumentError, ArgumentParser, Namespace
from dataclasses import _MISSING_TYPE, MISSING, is_dataclass
from enum import Enum
from typing import Any, Dict, List, Optional, Tuple, Type
from fairseq.dataclass import FairseqDataclass
from fairseq.dataclass.configs import FairseqConfig
from hydra.core.global_hydra import GlobalHydra
from hydra.experimental import compose, initialize
from omegaconf import DictConfig, OmegaConf, open_dict, _utils
logger = logging.getLogger(__name__)
def eval_str_list(x, x_type=float):
if x is None:
return None
if isinstance(x, str):
if len(x) == 0:
return []
x = ast.literal_eval(x)
try:
return list(map(x_type, x))
except TypeError:
return [x_type(x)]
def interpret_dc_type(field_type):
if isinstance(field_type, str):
raise RuntimeError("field should be a type")
if field_type == Any:
return str
typestring = str(field_type)
if re.match(
r"(typing.|^)Union\[(.*), NoneType\]$", typestring
) or typestring.startswith("typing.Optional"):
return field_type.__args__[0]
return field_type
def gen_parser_from_dataclass(
parser: ArgumentParser,
dataclass_instance: FairseqDataclass,
delete_default: bool = False,
with_prefix: Optional[str] = None,
) -> None:
"""
convert a dataclass instance to tailing parser arguments.
If `with_prefix` is provided, prefix all the keys in the resulting parser with it. It means that we are
building a flat namespace from a structured dataclass (see transformer_config.py for example).
"""
def argparse_name(name: str):
if name == "data" and (with_prefix is None or with_prefix == ""):
# normally data is positional args, so we don't add the -- nor the prefix
return name
if name == "_name":
# private member, skip
return None
full_name = "--" + name.replace("_", "-")
if with_prefix is not None and with_prefix != "":
# if a prefix is specified, construct the prefixed arg name
full_name = with_prefix + "-" + full_name[2:] # strip -- when composing
return full_name
def get_kwargs_from_dc(
dataclass_instance: FairseqDataclass, k: str
) -> Dict[str, Any]:
"""k: dataclass attributes"""
kwargs = {}
field_type = dataclass_instance._get_type(k)
inter_type = interpret_dc_type(field_type)
field_default = dataclass_instance._get_default(k)
if isinstance(inter_type, type) and issubclass(inter_type, Enum):
field_choices = [t.value for t in list(inter_type)]
else:
field_choices = None
field_help = dataclass_instance._get_help(k)
field_const = dataclass_instance._get_argparse_const(k)
if isinstance(field_default, str) and field_default.startswith("${"):
kwargs["default"] = field_default
else:
if field_default is MISSING:
kwargs["required"] = True
if field_choices is not None:
kwargs["choices"] = field_choices
if (
isinstance(inter_type, type)
and (issubclass(inter_type, List) or issubclass(inter_type, Tuple))
) or ("List" in str(inter_type) or "Tuple" in str(inter_type)):
if "int" in str(inter_type):
kwargs["type"] = lambda x: eval_str_list(x, int)
elif "float" in str(inter_type):
kwargs["type"] = lambda x: eval_str_list(x, float)
elif "str" in str(inter_type):
kwargs["type"] = lambda x: eval_str_list(x, str)
else:
raise NotImplementedError(
"parsing of type " + str(inter_type) + " is not implemented"
)
if field_default is not MISSING:
kwargs["default"] = (
",".join(map(str, field_default))
if field_default is not None
else None
)
elif (
isinstance(inter_type, type) and issubclass(inter_type, Enum)
) or "Enum" in str(inter_type):
kwargs["type"] = str
if field_default is not MISSING:
if isinstance(field_default, Enum):
kwargs["default"] = field_default.value
else:
kwargs["default"] = field_default
elif inter_type is bool:
kwargs["action"] = (
"store_false" if field_default is True else "store_true"
)
kwargs["default"] = field_default
else:
kwargs["type"] = inter_type
if field_default is not MISSING:
kwargs["default"] = field_default
# build the help with the hierarchical prefix
if with_prefix is not None and with_prefix != "" and field_help is not None:
field_help = with_prefix[2:] + ": " + field_help
kwargs["help"] = field_help
if field_const is not None:
kwargs["const"] = field_const
kwargs["nargs"] = "?"
return kwargs
for k in dataclass_instance._get_all_attributes():
field_name = argparse_name(dataclass_instance._get_name(k))
field_type = dataclass_instance._get_type(k)
if field_name is None:
continue
elif inspect.isclass(field_type) and issubclass(field_type, FairseqDataclass):
# for fields that are of type FairseqDataclass, we can recursively
# add their fields to the namespace (so we add the args from model, task, etc. to the root namespace)
prefix = None
if with_prefix is not None:
# if a prefix is specified, then we don't want to copy the subfields directly to the root namespace
# but we prefix them with the name of the current field.
prefix = field_name
gen_parser_from_dataclass(parser, field_type(), delete_default, prefix)
continue
kwargs = get_kwargs_from_dc(dataclass_instance, k)
field_args = [field_name]
alias = dataclass_instance._get_argparse_alias(k)
if alias is not None:
field_args.append(alias)
if "default" in kwargs:
if isinstance(kwargs["default"], str) and kwargs["default"].startswith(
"${"
):
if kwargs["help"] is None:
# this is a field with a name that will be added elsewhere
continue
else:
del kwargs["default"]
if delete_default and "default" in kwargs:
del kwargs["default"]
try:
parser.add_argument(*field_args, **kwargs)
except ArgumentError:
pass
def _set_legacy_defaults(args, cls):
"""Helper to set default arguments based on *add_args*."""
if not hasattr(cls, "add_args"):
return
import argparse
parser = argparse.ArgumentParser(
argument_default=argparse.SUPPRESS, allow_abbrev=False
)
cls.add_args(parser)
# copied from argparse.py:
defaults = argparse.Namespace()
for action in parser._actions:
if action.dest is not argparse.SUPPRESS:
if not hasattr(defaults, action.dest):
if action.default is not argparse.SUPPRESS:
setattr(defaults, action.dest, action.default)
for key, default_value in vars(defaults).items():
if not hasattr(args, key):
setattr(args, key, default_value)
def _override_attr(
sub_node: str, data_class: Type[FairseqDataclass], args: Namespace
) -> List[str]:
overrides = []
if not inspect.isclass(data_class) or not issubclass(data_class, FairseqDataclass):
return overrides
def get_default(f):
if not isinstance(f.default_factory, _MISSING_TYPE):
return f.default_factory()
return f.default
for k, v in data_class.__dataclass_fields__.items():
if k.startswith("_"):
# private member, skip
continue
val = get_default(v) if not hasattr(args, k) else getattr(args, k)
field_type = interpret_dc_type(v.type)
if (
isinstance(val, str)
and not val.startswith("${") # not interpolation
and field_type != str
and (
not inspect.isclass(field_type) or not issubclass(field_type, Enum)
) # not choices enum
):
# upgrade old models that stored complex parameters as string
val = ast.literal_eval(val)
if isinstance(val, tuple):
val = list(val)
v_type = getattr(v.type, "__origin__", None)
if (
(v_type is List or v_type is list or v_type is Optional)
# skip interpolation
and not (isinstance(val, str) and val.startswith("${"))
):
# if type is int but val is float, then we will crash later - try to convert here
if hasattr(v.type, "__args__"):
t_args = v.type.__args__
if len(t_args) == 1 and (t_args[0] is float or t_args[0] is int):
val = list(map(t_args[0], val))
elif val is not None and (
field_type is int or field_type is bool or field_type is float
):
try:
val = field_type(val)
except:
pass # ignore errors here, they are often from interpolation args
if val is None:
overrides.append("{}.{}=null".format(sub_node, k))
elif val == "":
overrides.append("{}.{}=''".format(sub_node, k))
elif isinstance(val, str):
val = val.replace("'", r"\'")
overrides.append("{}.{}='{}'".format(sub_node, k, val))
elif isinstance(val, FairseqDataclass):
overrides += _override_attr(f"{sub_node}.{k}", type(val), args)
elif isinstance(val, Namespace):
sub_overrides, _ = override_module_args(val)
for so in sub_overrides:
overrides.append(f"{sub_node}.{k}.{so}")
else:
overrides.append("{}.{}={}".format(sub_node, k, val))
return overrides
def migrate_registry(
name, value, registry, args, overrides, deletes, use_name_as_val=False
):
if value in registry:
overrides.append("{}={}".format(name, value))
overrides.append("{}._name={}".format(name, value))
overrides.extend(_override_attr(name, registry[value], args))
elif use_name_as_val and value is not None:
overrides.append("{}={}".format(name, value))
else:
deletes.append(name)
def override_module_args(args: Namespace) -> Tuple[List[str], List[str]]:
"""use the field in args to overrides those in cfg"""
overrides = []
deletes = []
for k in FairseqConfig.__dataclass_fields__.keys():
overrides.extend(
_override_attr(k, FairseqConfig.__dataclass_fields__[k].type, args)
)
if args is not None:
if hasattr(args, "task"):
from fairseq.tasks import TASK_DATACLASS_REGISTRY
migrate_registry(
"task", args.task, TASK_DATACLASS_REGISTRY, args, overrides, deletes
)
else:
deletes.append("task")
# these options will be set to "None" if they have not yet been migrated
# so we can populate them with the entire flat args
CORE_REGISTRIES = {"criterion", "optimizer", "lr_scheduler"}
from fairseq.registry import REGISTRIES
for k, v in REGISTRIES.items():
if hasattr(args, k):
migrate_registry(
k,
getattr(args, k),
v["dataclass_registry"],
args,
overrides,
deletes,
use_name_as_val=k not in CORE_REGISTRIES,
)
else:
deletes.append(k)
no_dc = True
if hasattr(args, "arch"):
from fairseq.models import ARCH_MODEL_REGISTRY, ARCH_MODEL_NAME_REGISTRY
if args.arch in ARCH_MODEL_REGISTRY:
m_cls = ARCH_MODEL_REGISTRY[args.arch]
dc = getattr(m_cls, "__dataclass", None)
if dc is not None:
m_name = ARCH_MODEL_NAME_REGISTRY[args.arch]
overrides.append("model={}".format(m_name))
overrides.append("model._name={}".format(args.arch))
# override model params with those exist in args
overrides.extend(_override_attr("model", dc, args))
no_dc = False
if no_dc:
deletes.append("model")
return overrides, deletes
class omegaconf_no_object_check:
def __init__(self):
self.old_is_primitive = _utils.is_primitive_type
def __enter__(self):
_utils.is_primitive_type = lambda _: True
def __exit__(self, type, value, traceback):
_utils.is_primitive_type = self.old_is_primitive
def convert_namespace_to_omegaconf(args: Namespace) -> DictConfig:
"""Convert a flat argparse.Namespace to a structured DictConfig."""
# Here we are using field values provided in args to override counterparts inside config object
overrides, deletes = override_module_args(args)
# configs will be in fairseq/config after installation
config_path = os.path.join("..", "config")
GlobalHydra.instance().clear()
with initialize(config_path=config_path):
try:
composed_cfg = compose("config", overrides=overrides, strict=False)
except:
logger.error("Error when composing. Overrides: " + str(overrides))
raise
for k in deletes:
composed_cfg[k] = None
cfg = OmegaConf.create(
OmegaConf.to_container(composed_cfg, resolve=True, enum_to_str=True)
)
# hack to be able to set Namespace in dict config. this should be removed when we update to newer
# omegaconf version that supports object flags, or when we migrate all existing models
with omegaconf_no_object_check():
if cfg.task is None and getattr(args, "task", None):
cfg.task = Namespace(**vars(args))
from fairseq.tasks import TASK_REGISTRY
_set_legacy_defaults(cfg.task, TASK_REGISTRY[args.task])
cfg.task._name = args.task
if cfg.model is None and getattr(args, "arch", None):
cfg.model = Namespace(**vars(args))
from fairseq.models import ARCH_MODEL_REGISTRY
_set_legacy_defaults(cfg.model, ARCH_MODEL_REGISTRY[args.arch])
cfg.model._name = args.arch
if cfg.optimizer is None and getattr(args, "optimizer", None):
cfg.optimizer = Namespace(**vars(args))
from fairseq.optim import OPTIMIZER_REGISTRY
_set_legacy_defaults(cfg.optimizer, OPTIMIZER_REGISTRY[args.optimizer])
cfg.optimizer._name = args.optimizer
if cfg.lr_scheduler is None and getattr(args, "lr_scheduler", None):
cfg.lr_scheduler = Namespace(**vars(args))
from fairseq.optim.lr_scheduler import LR_SCHEDULER_REGISTRY
_set_legacy_defaults(
cfg.lr_scheduler, LR_SCHEDULER_REGISTRY[args.lr_scheduler]
)
cfg.lr_scheduler._name = args.lr_scheduler
if cfg.criterion is None and getattr(args, "criterion", None):
cfg.criterion = Namespace(**vars(args))
from fairseq.criterions import CRITERION_REGISTRY
_set_legacy_defaults(cfg.criterion, CRITERION_REGISTRY[args.criterion])
cfg.criterion._name = args.criterion
OmegaConf.set_struct(cfg, True)
return cfg
def overwrite_args_by_name(cfg: DictConfig, overrides: Dict[str, any]):
# this will be deprecated when we get rid of argparse and model_overrides logic
from fairseq.registry import REGISTRIES
with open_dict(cfg):
for k in cfg.keys():
# "k in cfg" will return false if its a "mandatory value (e.g. ???)"
if k in cfg and isinstance(cfg[k], DictConfig):
if k in overrides and isinstance(overrides[k], dict):
for ok, ov in overrides[k].items():
if isinstance(ov, dict) and cfg[k][ok] is not None:
overwrite_args_by_name(cfg[k][ok], ov)
else:
cfg[k][ok] = ov
else:
overwrite_args_by_name(cfg[k], overrides)
elif k in cfg and isinstance(cfg[k], Namespace):
for override_key, val in overrides.items():
setattr(cfg[k], override_key, val)
elif k in overrides:
if (
k in REGISTRIES
and overrides[k] in REGISTRIES[k]["dataclass_registry"]
):
cfg[k] = DictConfig(
REGISTRIES[k]["dataclass_registry"][overrides[k]]
)
overwrite_args_by_name(cfg[k], overrides)
cfg[k]._name = overrides[k]
else:
cfg[k] = overrides[k]
def merge_with_parent(dc: FairseqDataclass, cfg: DictConfig, remove_missing=False):
if remove_missing:
if is_dataclass(dc):
target_keys = set(dc.__dataclass_fields__.keys())
else:
target_keys = set(dc.keys())
with open_dict(cfg):
for k in list(cfg.keys()):
if k not in target_keys:
del cfg[k]
merged_cfg = OmegaConf.merge(dc, cfg)
merged_cfg.__dict__["_parent"] = cfg.__dict__["_parent"]
OmegaConf.set_struct(merged_cfg, True)
return merged_cfg
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KosmosX-API-main
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kosmosX/fairseq/fairseq/dataclass/utils.py
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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
import torch.nn as nn
class BeamableMM(nn.Module):
"""This module provides an optimized MM for beam decoding with attention.
It leverage the fact that the source-side of the input is replicated beam
times and the target-side of the input is of width one. This layer speeds up
inference by replacing the inputs {(bsz x 1 x nhu), (bsz x sz2 x nhu)}
with smaller inputs {(bsz/beam x beam x nhu), (bsz/beam x sz2 x nhu)}.
"""
def __init__(self, beam_size=None):
super(BeamableMM, self).__init__()
self.beam_size = beam_size
def forward(self, input1, input2):
if (
not self.training
and self.beam_size is not None # test mode
and input1.dim() == 3 # beam size is set
and input1.size(1) # only support batched input
== 1 # single time step update
):
bsz, beam = input1.size(0), self.beam_size
# bsz x 1 x nhu --> bsz/beam x beam x nhu
input1 = input1[:, 0, :].unfold(0, beam, beam).transpose(2, 1)
# bsz x sz2 x nhu --> bsz/beam x sz2 x nhu
input2 = input2.unfold(0, beam, beam)[:, :, :, 0]
# use non batched operation if bsz = beam
if input1.size(0) == 1:
output = torch.mm(input1[0, :, :], input2[0, :, :])
else:
output = input1.bmm(input2)
return output.view(bsz, 1, -1)
else:
return input1.bmm(input2)
def set_beam_size(self, beam_size):
self.beam_size = beam_size
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/beamable_mm.py
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# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
#
import math
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq.modules.fairseq_dropout import FairseqDropout
from fairseq.modules.scalar_bias import scalar_bias
class SingleHeadAttention(nn.Module):
"""
Single-head attention that supports Gating and Downsampling
"""
def __init__(
self,
out_channels,
embed_dim,
head_dim,
head_index,
dropout=0.0,
bias=True,
project_input=True,
gated=False,
downsample=False,
num_heads=1,
):
super().__init__()
self.embed_dim = embed_dim
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.head_index = head_index
self.head_dim = head_dim
self.project_input = project_input
self.gated = gated
self.downsample = downsample
self.num_heads = num_heads
self.projection = None
k_layers = []
v_layers = []
if self.downsample:
k_layers.append(Downsample(self.head_index))
v_layers.append(Downsample(self.head_index))
out_proj_size = self.head_dim
else:
out_proj_size = self.head_dim * self.num_heads
if self.gated:
k_layers.append(GatedLinear(self.embed_dim, out_proj_size, bias=bias))
self.in_proj_q = GatedLinear(self.embed_dim, out_proj_size, bias=bias)
v_layers.append(GatedLinear(self.embed_dim, out_proj_size, bias=bias))
else:
k_layers.append(Linear(self.embed_dim, out_proj_size, bias=bias))
self.in_proj_q = Linear(self.embed_dim, out_proj_size, bias=bias)
v_layers.append(Linear(self.embed_dim, out_proj_size, bias=bias))
self.in_proj_k = nn.Sequential(*k_layers)
self.in_proj_v = nn.Sequential(*v_layers)
if self.downsample:
self.out_proj = Linear(out_proj_size, self.head_dim, bias=bias)
else:
self.out_proj = Linear(out_proj_size, out_channels, bias=bias)
self.scaling = self.head_dim ** -0.5
def forward(
self,
query,
key,
value,
mask_future_timesteps=False,
key_padding_mask=None,
use_scalar_bias=False,
):
"""Input shape: Time x Batch x Channel
Self-attention can be implemented by passing in the same arguments for
query, key and value. Future timesteps can be masked with the
`mask_future_timesteps` argument. Padding elements can be excluded from
the key by passing a binary ByteTensor (`key_padding_mask`) with shape:
batch x src_len, where padding elements are indicated by 1s.
"""
src_len, bsz, out_channels = key.size()
tgt_len = query.size(0)
assert list(query.size()) == [tgt_len, bsz, out_channels]
assert key.size() == value.size()
if key_padding_mask is not None:
assert key_padding_mask.size(0) == bsz
assert key_padding_mask.size(1) == src_len
if self.downsample:
size = bsz
else:
size = bsz * self.num_heads
k = key
v = value
q = query
if self.project_input:
q = self.in_proj_q(q)
k = self.in_proj_k(k)
v = self.in_proj_v(v)
src_len = k.size()[0]
q *= self.scaling
if not self.downsample:
q = q.view(tgt_len, size, self.head_dim)
k = k.view(src_len, size, self.head_dim)
v = v.view(src_len, size, self.head_dim)
q = q.transpose(0, 1)
k = k.transpose(0, 1)
v = v.transpose(0, 1)
attn_weights = torch.bmm(q, k.transpose(1, 2))
if mask_future_timesteps:
assert (
query.size() == key.size()
), "mask_future_timesteps only applies to self-attention"
attn_weights *= torch.tril(
attn_weights.data.new([1]).expand(tgt_len, tgt_len).clone(),
diagonal=-1,
)[:, :: self.head_index + 1 if self.downsample else 1].unsqueeze(0)
attn_weights += torch.triu(
attn_weights.data.new([-math.inf]).expand(tgt_len, tgt_len).clone(),
diagonal=0,
)[:, :: self.head_index + 1 if self.downsample else 1].unsqueeze(0)
tgt_size = tgt_len
if use_scalar_bias:
attn_weights = scalar_bias(attn_weights, 2)
v = scalar_bias(v, 1)
tgt_size += 1
if key_padding_mask is not None:
# don't attend to padding symbols
if key_padding_mask.max() > 0:
if self.downsample:
attn_weights = attn_weights.view(bsz, 1, tgt_len, src_len)
else:
attn_weights = attn_weights.view(
size, self.num_heads, tgt_len, src_len
)
attn_weights = attn_weights.masked_fill(
key_padding_mask.unsqueeze(1).unsqueeze(2),
-math.inf,
)
attn_weights = attn_weights.view(size, tgt_len, src_len)
attn_weights = F.softmax(attn_weights, dim=-1)
attn_weights = self.dropout_module(attn_weights)
attn = torch.bmm(attn_weights, v)
if self.downsample:
attn = attn.transpose(0, 1).contiguous().view(tgt_len, bsz, self.head_dim)
else:
attn = attn.transpose(0, 1).contiguous().view(tgt_len, bsz, self.embed_dim)
attn = self.out_proj(attn)
return attn, attn_weights
class DownsampledMultiHeadAttention(nn.ModuleList):
"""
Multi-headed attention with Gating and Downsampling
"""
def __init__(
self,
out_channels,
embed_dim,
num_heads,
dropout=0.0,
bias=True,
project_input=True,
gated=False,
downsample=False,
):
self.embed_dim = embed_dim
self.num_heads = num_heads
self.head_dim = embed_dim // num_heads
self.downsample = downsample
self.gated = gated
self.project_input = project_input
assert self.head_dim * num_heads == embed_dim
if self.downsample:
attention_heads = []
for index in range(self.num_heads):
attention_heads.append(
SingleHeadAttention(
out_channels,
self.embed_dim,
self.head_dim,
index,
dropout,
bias,
self.project_input,
self.gated,
self.downsample,
self.num_heads,
)
)
super().__init__(modules=attention_heads)
self.out_proj = Linear(embed_dim, out_channels, bias=bias)
else:
# either we have a list of attention heads, or just one attention head
# if not being downsampled, we can do the heads with one linear layer instead of separate ones
super().__init__()
self.attention_module = SingleHeadAttention(
out_channels,
self.embed_dim,
self.head_dim,
1,
dropout,
bias,
self.project_input,
self.gated,
self.downsample,
self.num_heads,
)
def forward(
self,
query,
key,
value,
mask_future_timesteps=False,
key_padding_mask=None,
use_scalar_bias=False,
):
src_len, bsz, embed_dim = key.size()
tgt_len = query.size(0)
assert embed_dim == self.embed_dim
assert list(query.size()) == [tgt_len, bsz, embed_dim]
assert key.size() == value.size()
tgt_size = tgt_len
if use_scalar_bias:
tgt_size += 1
attn = []
attn_weights = []
if self.downsample:
for attention_head_number in range(self.num_heads):
# call the forward of each attention head
_attn, _attn_weight = self[attention_head_number](
query,
key,
value,
mask_future_timesteps,
key_padding_mask,
use_scalar_bias,
)
attn.append(_attn)
attn_weights.append(_attn_weight)
full_attn = torch.cat(attn, dim=2)
full_attn = self.out_proj(full_attn)
return full_attn, attn_weights[0].clone()
else:
_attn, _attn_weight = self.attention_module(
query,
key,
value,
mask_future_timesteps,
key_padding_mask,
use_scalar_bias,
)
attn.append(_attn)
attn_weights.append(_attn_weight)
full_attn = torch.cat(attn, dim=2)
full_attn_weights = torch.cat(attn_weights)
full_attn_weights = full_attn_weights.view(
bsz, self.num_heads, tgt_size, src_len
)
full_attn_weights = full_attn_weights.sum(dim=1) / self.num_heads
return full_attn, full_attn_weights
class Downsample(nn.Module):
"""
Selects every nth element, where n is the index
"""
def __init__(self, index):
super().__init__()
self.index = index
def forward(self, x):
return x[:: self.index + 1]
def Linear(in_features, out_features, dropout=0.0, bias=True):
"""Weight-normalized Linear layer (input: B x T x C)"""
m = nn.Linear(in_features, out_features, bias=bias)
m.weight.data.normal_(mean=0, std=math.sqrt((1 - dropout) / in_features))
m.bias.data.zero_()
return nn.utils.weight_norm(m)
def GatedLinear(in_features, out_features, dropout=0.0, bias=True):
"""Weight-normalized Linear layer (input: B x T x C) with interspersed GLU units"""
return nn.Sequential(
Linear(in_features, out_features * 4, dropout, bias),
nn.GLU(),
Linear(out_features * 2, out_features * 2, dropout, bias),
nn.GLU(),
Linear(out_features, out_features, dropout, bias),
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/downsampled_multihead_attention.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
import torch
import torch.nn.functional as F
logger = logging.getLogger(__name__)
def _cross_entropy_pytorch(logits, target, ignore_index=None, reduction="mean"):
lprobs = F.log_softmax(logits, dim=-1, dtype=torch.float32)
return F.nll_loss(
lprobs,
target,
ignore_index=ignore_index,
reduction=reduction,
)
try:
import xentropy_cuda
from apex.contrib import xentropy
def cross_entropy(logits, target, ignore_index=-100, reduction="mean"):
if logits.device == torch.device("cpu"):
return _cross_entropy_pytorch(logits, target, ignore_index, reduction)
else:
if not getattr(cross_entropy, "_has_logged_once", False):
logger.info("using fused cross entropy")
cross_entropy._has_logged_once = True
half_to_float = logits.dtype == torch.half
losses = xentropy.SoftmaxCrossEntropyLoss.apply(
logits,
target,
0.0,
ignore_index,
half_to_float,
)
if reduction == "sum":
return losses.sum()
elif reduction == "mean":
if ignore_index >= 0:
return losses.sum() / target.ne(ignore_index).sum()
else:
return losses.mean()
elif reduction == "none":
return losses
else:
raise NotImplementedError
except ImportError:
def cross_entropy(logits, target, ignore_index=-100, reduction="mean"):
return _cross_entropy_pytorch(logits, target, ignore_index, reduction)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/cross_entropy.py
|
import torch
class RotaryPositionalEmbedding(torch.nn.Module):
def __init__(self, dim, base=10000, precision=torch.half):
"""Rotary positional embedding
Reference : https://blog.eleuther.ai/rotary-embeddings/
Paper: https://arxiv.org/pdf/2104.09864.pdf
Args:
dim: Dimension of embedding
base: Base value for exponential
precision: precision to use for numerical values
"""
super().__init__()
inv_freq = 1.0 / (base ** (torch.arange(0, dim, 2).float() / dim))
self.register_buffer("inv_freq", inv_freq)
self.seq_len_cached = None
self.cos_cached = None
self.sin_cached = None
self.precision = precision
def forward(self, x, seq_len=None):
"""
Args:
x: Input x with T X B X C
seq_len: Sequence length of input x
"""
if seq_len != self.seq_len_cached:
self.seq_len_cached = seq_len
t = torch.arange(seq_len, device=x.device).type_as(self.inv_freq)
freqs = torch.einsum("i,j->ij", t, self.inv_freq)
emb = torch.cat((freqs, freqs), dim=-1).to(x.device)
self.cos_cached = emb.cos()[:, None, None, :]
self.sin_cached = emb.sin()[:, None, None, :]
return self.cos_cached, self.sin_cached
# rotary pos emb helpers:
def rotate_half(x):
x1, x2 = x[..., : x.shape[-1] // 2], x[..., x.shape[-1] // 2 :]
return torch.cat(
(-x2, x1), dim=x1.ndim - 1
) # dim=-1 triggers a bug in earlier torch versions
def apply_rotary_pos_emb(q, k, cos, sin, offset: int = 0):
cos, sin = (
cos[offset : q.shape[0] + offset, ...],
sin[offset : q.shape[0] + offset, ...],
)
return (q * cos) + (rotate_half(q) * sin), (k * cos) + (rotate_half(k) * sin)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/rotary_positional_embedding.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import math
from typing import Dict, List, Optional, Tuple
import torch
import torch.nn.functional as F
from fairseq import utils
from fairseq.incremental_decoding_utils import with_incremental_state
from fairseq.modules.fairseq_dropout import FairseqDropout
from fairseq.modules.quant_noise import quant_noise
from torch import Tensor, nn
from torch.nn import Parameter
from fairseq.modules import LayerNorm
@with_incremental_state
class MultiheadAttention(nn.Module):
"""Multi-headed attention.
See "Attention Is All You Need" for more details.
"""
def __init__(
self,
embed_dim,
num_heads,
kdim=None,
vdim=None,
dropout=0.0,
bias=True,
add_bias_kv=False,
add_zero_attn=False,
self_attention=False,
encoder_decoder_attention=False,
q_noise=0.0,
qn_block_size=8,
attention_norm=False,
):
super().__init__()
self.embed_dim = embed_dim
self.kdim = kdim if kdim is not None else embed_dim
self.vdim = vdim if vdim is not None else embed_dim
self.qkv_same_dim = self.kdim == embed_dim and self.vdim == embed_dim
if attention_norm:
self.attn_ln = LayerNorm(self.embed_dim)
else:
self.attn_ln = None
self.num_heads = num_heads
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.head_dim = embed_dim // num_heads
assert (
self.head_dim * num_heads == self.embed_dim
), "embed_dim must be divisible by num_heads"
self.scaling = self.head_dim ** -0.5
self.self_attention = self_attention
self.encoder_decoder_attention = encoder_decoder_attention
assert not self.self_attention or self.qkv_same_dim, (
"Self-attention requires query, key and " "value to be of the same size"
)
self.k_proj = quant_noise(
nn.Linear(self.kdim, embed_dim, bias=bias), q_noise, qn_block_size
)
self.v_proj = quant_noise(
nn.Linear(self.vdim, embed_dim, bias=bias), q_noise, qn_block_size
)
self.q_proj = quant_noise(
nn.Linear(embed_dim, embed_dim, bias=bias), q_noise, qn_block_size
)
self.out_proj = quant_noise(
nn.Linear(embed_dim, embed_dim, bias=bias), q_noise, qn_block_size
)
if add_bias_kv:
self.bias_k = Parameter(torch.Tensor(1, 1, embed_dim))
self.bias_v = Parameter(torch.Tensor(1, 1, embed_dim))
else:
self.bias_k = self.bias_v = None
self.add_zero_attn = add_zero_attn
self.reset_parameters()
self.onnx_trace = False
self.skip_embed_dim_check = False
def prepare_for_onnx_export_(self):
self.onnx_trace = True
def reset_parameters(self):
if self.qkv_same_dim:
# Empirically observed the convergence to be much better with
# the scaled initialization
nn.init.xavier_uniform_(self.k_proj.weight, gain=1 / math.sqrt(2))
nn.init.xavier_uniform_(self.v_proj.weight, gain=1 / math.sqrt(2))
nn.init.xavier_uniform_(self.q_proj.weight, gain=1 / math.sqrt(2))
else:
nn.init.xavier_uniform_(self.k_proj.weight)
nn.init.xavier_uniform_(self.v_proj.weight)
nn.init.xavier_uniform_(self.q_proj.weight)
nn.init.xavier_uniform_(self.out_proj.weight)
if self.out_proj.bias is not None:
nn.init.constant_(self.out_proj.bias, 0.0)
if self.bias_k is not None:
nn.init.xavier_normal_(self.bias_k)
if self.bias_v is not None:
nn.init.xavier_normal_(self.bias_v)
def _get_reserve_head_index(self, num_heads_to_keep: int):
k_proj_heads_norm = []
q_proj_heads_norm = []
v_proj_heads_norm = []
for i in range(self.num_heads):
start_idx = i * self.head_dim
end_idx = (i + 1) * self.head_dim
k_proj_heads_norm.append(
torch.sum(
torch.abs(
self.k_proj.weight[
start_idx:end_idx,
]
)
).tolist()
+ torch.sum(torch.abs(self.k_proj.bias[start_idx:end_idx])).tolist()
)
q_proj_heads_norm.append(
torch.sum(
torch.abs(
self.q_proj.weight[
start_idx:end_idx,
]
)
).tolist()
+ torch.sum(torch.abs(self.q_proj.bias[start_idx:end_idx])).tolist()
)
v_proj_heads_norm.append(
torch.sum(
torch.abs(
self.v_proj.weight[
start_idx:end_idx,
]
)
).tolist()
+ torch.sum(torch.abs(self.v_proj.bias[start_idx:end_idx])).tolist()
)
heads_norm = []
for i in range(self.num_heads):
heads_norm.append(
k_proj_heads_norm[i] + q_proj_heads_norm[i] + v_proj_heads_norm[i]
)
sorted_head_index = sorted(
range(self.num_heads), key=lambda k: heads_norm[k], reverse=True
)
reserve_head_index = []
for i in range(num_heads_to_keep):
start = sorted_head_index[i] * self.head_dim
end = (sorted_head_index[i] + 1) * self.head_dim
reserve_head_index.append((start, end))
return reserve_head_index
def _adaptive_prune_heads(self, reserve_head_index: List[Tuple[int, int]]):
new_q_weight = []
new_q_bias = []
new_k_weight = []
new_k_bias = []
new_v_weight = []
new_v_bias = []
new_out_proj_weight = []
for ele in reserve_head_index:
start_idx, end_idx = ele
new_q_weight.append(
self.q_proj.weight[
start_idx:end_idx,
]
)
new_q_bias.append(self.q_proj.bias[start_idx:end_idx])
new_k_weight.append(
self.k_proj.weight[
start_idx:end_idx,
]
)
new_k_bias.append(self.k_proj.bias[start_idx:end_idx])
new_v_weight.append(
self.v_proj.weight[
start_idx:end_idx,
]
)
new_v_bias.append(self.v_proj.bias[start_idx:end_idx])
new_out_proj_weight.append(self.out_proj.weight[:, start_idx:end_idx])
new_q_weight = torch.cat(new_q_weight).detach()
new_k_weight = torch.cat(new_k_weight).detach()
new_v_weight = torch.cat(new_v_weight).detach()
new_out_proj_weight = torch.cat(new_out_proj_weight, dim=-1).detach()
new_q_weight.requires_grad = True
new_k_weight.requires_grad = True
new_v_weight.requires_grad = True
new_out_proj_weight.requires_grad = True
new_q_bias = torch.cat(new_q_bias).detach()
new_q_bias.requires_grad = True
new_k_bias = torch.cat(new_k_bias).detach()
new_k_bias.requires_grad = True
new_v_bias = torch.cat(new_v_bias).detach()
new_v_bias.requires_grad = True
self.q_proj.weight = torch.nn.Parameter(new_q_weight)
self.q_proj.bias = torch.nn.Parameter(new_q_bias)
self.k_proj.weight = torch.nn.Parameter(new_k_weight)
self.k_proj.bias = torch.nn.Parameter(new_k_bias)
self.v_proj.weight = torch.nn.Parameter(new_v_weight)
self.v_proj.bias = torch.nn.Parameter(new_v_bias)
self.out_proj.weight = torch.nn.Parameter(new_out_proj_weight)
self.num_heads = len(reserve_head_index)
self.embed_dim = self.head_dim * self.num_heads
self.q_proj.out_features = self.embed_dim
self.k_proj.out_features = self.embed_dim
self.v_proj.out_features = self.embed_dim
def _set_skip_embed_dim_check(self):
self.skip_embed_dim_check = True
def forward(
self,
query,
key: Optional[Tensor],
value: Optional[Tensor],
key_padding_mask: Optional[Tensor] = None,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
need_weights: bool = True,
static_kv: bool = False,
attn_mask: Optional[Tensor] = None,
before_softmax: bool = False,
need_head_weights: bool = False,
) -> Tuple[Tensor, Optional[Tensor]]:
"""Input shape: Time x Batch x Channel
Args:
key_padding_mask (ByteTensor, optional): mask to exclude
keys that are pads, of shape `(batch, src_len)`, where
padding elements are indicated by 1s.
need_weights (bool, optional): return the attention weights,
averaged over heads (default: False).
attn_mask (ByteTensor, optional): typically used to
implement causal attention, where the mask prevents the
attention from looking forward in time (default: None).
before_softmax (bool, optional): return the raw attention
weights and values before the attention softmax.
need_head_weights (bool, optional): return the attention
weights for each head. Implies *need_weights*. Default:
return the average attention weights over all heads.
"""
if need_head_weights:
need_weights = True
is_tpu = query.device.type == "xla"
tgt_len, bsz, embed_dim = query.size()
src_len = tgt_len
if not self.skip_embed_dim_check:
assert (
embed_dim == self.embed_dim
), f"query dim {embed_dim} != {self.embed_dim}"
assert list(query.size()) == [tgt_len, bsz, embed_dim]
if key is not None:
src_len, key_bsz, _ = key.size()
if not torch.jit.is_scripting():
assert key_bsz == bsz
assert value is not None
assert src_len, bsz == value.shape[:2]
if (
not self.onnx_trace
and not is_tpu # don't use PyTorch version on TPUs
and incremental_state is None
and not static_kv
# A workaround for quantization to work. Otherwise JIT compilation
# treats bias in linear module as method.
and not torch.jit.is_scripting()
# The Multihead attention implemented in pytorch forces strong dimension check
# for input embedding dimention and K,Q,V projection dimension.
# Since pruning will break the dimension check and it is not easy to modify the pytorch API,
# it is preferred to bypass the pytorch MHA when we need to skip embed_dim_check
and not self.skip_embed_dim_check
and self.attn_ln is None
):
assert key is not None and value is not None
return F.multi_head_attention_forward(
query,
key,
value,
self.embed_dim,
self.num_heads,
torch.empty([0]),
torch.cat((self.q_proj.bias, self.k_proj.bias, self.v_proj.bias)),
self.bias_k,
self.bias_v,
self.add_zero_attn,
self.dropout_module.p,
self.out_proj.weight,
self.out_proj.bias,
self.training or self.dropout_module.apply_during_inference,
key_padding_mask,
need_weights,
attn_mask,
use_separate_proj_weight=True,
q_proj_weight=self.q_proj.weight,
k_proj_weight=self.k_proj.weight,
v_proj_weight=self.v_proj.weight,
)
if incremental_state is not None:
saved_state = self._get_input_buffer(incremental_state)
if saved_state is not None and "prev_key" in saved_state:
# previous time steps are cached - no need to recompute
# key and value if they are static
if static_kv:
assert self.encoder_decoder_attention and not self.self_attention
key = value = None
else:
saved_state = None
if self.self_attention:
q = self.q_proj(query)
k = self.k_proj(query)
v = self.v_proj(query)
elif self.encoder_decoder_attention:
# encoder-decoder attention
q = self.q_proj(query)
if key is None:
assert value is None
k = v = None
else:
k = self.k_proj(key)
v = self.v_proj(key)
else:
assert key is not None and value is not None
q = self.q_proj(query)
k = self.k_proj(key)
v = self.v_proj(value)
q *= self.scaling
if self.bias_k is not None:
assert self.bias_v is not None
k = torch.cat([k, self.bias_k.repeat(1, bsz, 1)])
v = torch.cat([v, self.bias_v.repeat(1, bsz, 1)])
if attn_mask is not None:
attn_mask = torch.cat(
[attn_mask, attn_mask.new_zeros(attn_mask.size(0), 1)], dim=1
)
if key_padding_mask is not None:
key_padding_mask = torch.cat(
[
key_padding_mask,
key_padding_mask.new_zeros(key_padding_mask.size(0), 1),
],
dim=1,
)
q = (
q.contiguous()
.view(tgt_len, bsz * self.num_heads, self.head_dim)
.transpose(0, 1)
)
if k is not None:
k = (
k.contiguous()
.view(-1, bsz * self.num_heads, self.head_dim)
.transpose(0, 1)
)
if v is not None:
v = (
v.contiguous()
.view(-1, bsz * self.num_heads, self.head_dim)
.transpose(0, 1)
)
if saved_state is not None:
# saved states are stored with shape (bsz, num_heads, seq_len, head_dim)
if "prev_key" in saved_state:
_prev_key = saved_state["prev_key"]
assert _prev_key is not None
prev_key = _prev_key.view(bsz * self.num_heads, -1, self.head_dim)
if static_kv:
k = prev_key
else:
assert k is not None
k = torch.cat([prev_key, k], dim=1)
src_len = k.size(1)
if "prev_value" in saved_state:
_prev_value = saved_state["prev_value"]
assert _prev_value is not None
prev_value = _prev_value.view(bsz * self.num_heads, -1, self.head_dim)
if static_kv:
v = prev_value
else:
assert v is not None
v = torch.cat([prev_value, v], dim=1)
prev_key_padding_mask: Optional[Tensor] = None
if "prev_key_padding_mask" in saved_state:
prev_key_padding_mask = saved_state["prev_key_padding_mask"]
assert k is not None and v is not None
key_padding_mask = MultiheadAttention._append_prev_key_padding_mask(
key_padding_mask=key_padding_mask,
prev_key_padding_mask=prev_key_padding_mask,
batch_size=bsz,
src_len=k.size(1),
static_kv=static_kv,
)
saved_state["prev_key"] = k.view(bsz, self.num_heads, -1, self.head_dim)
saved_state["prev_value"] = v.view(bsz, self.num_heads, -1, self.head_dim)
saved_state["prev_key_padding_mask"] = key_padding_mask
# In this branch incremental_state is never None
assert incremental_state is not None
incremental_state = self._set_input_buffer(incremental_state, saved_state)
assert k is not None
assert k.size(1) == src_len
# This is part of a workaround to get around fork/join parallelism
# not supporting Optional types.
if key_padding_mask is not None and key_padding_mask.dim() == 0:
key_padding_mask = None
if key_padding_mask is not None:
assert key_padding_mask.size(0) == bsz
assert key_padding_mask.size(1) == src_len
if self.add_zero_attn:
assert v is not None
src_len += 1
k = torch.cat([k, k.new_zeros((k.size(0), 1) + k.size()[2:])], dim=1)
v = torch.cat([v, v.new_zeros((v.size(0), 1) + v.size()[2:])], dim=1)
if attn_mask is not None:
attn_mask = torch.cat(
[attn_mask, attn_mask.new_zeros(attn_mask.size(0), 1)], dim=1
)
if key_padding_mask is not None:
key_padding_mask = torch.cat(
[
key_padding_mask,
torch.zeros(key_padding_mask.size(0), 1).type_as(
key_padding_mask
),
],
dim=1,
)
attn_weights = torch.bmm(q, k.transpose(1, 2))
attn_weights = self.apply_sparse_mask(attn_weights, tgt_len, src_len, bsz)
assert list(attn_weights.size()) == [bsz * self.num_heads, tgt_len, src_len]
if attn_mask is not None:
attn_mask = attn_mask.unsqueeze(0)
if self.onnx_trace:
attn_mask = attn_mask.repeat(attn_weights.size(0), 1, 1)
attn_weights += attn_mask
if key_padding_mask is not None:
# don't attend to padding symbols
attn_weights = attn_weights.view(bsz, self.num_heads, tgt_len, src_len)
if not is_tpu:
attn_weights = attn_weights.masked_fill(
key_padding_mask.unsqueeze(1).unsqueeze(2).to(torch.bool),
float("-inf"),
)
else:
attn_weights = attn_weights.transpose(0, 2)
attn_weights = attn_weights.masked_fill(key_padding_mask, float("-inf"))
attn_weights = attn_weights.transpose(0, 2)
attn_weights = attn_weights.view(bsz * self.num_heads, tgt_len, src_len)
if before_softmax:
return attn_weights, v
attn_weights_float = utils.softmax(
attn_weights, dim=-1, onnx_trace=self.onnx_trace
)
attn_weights = attn_weights_float.type_as(attn_weights)
attn_probs = self.dropout_module(attn_weights)
assert v is not None
attn = torch.bmm(attn_probs, v)
assert list(attn.size()) == [bsz * self.num_heads, tgt_len, self.head_dim]
if self.onnx_trace and attn.size(1) == 1:
# when ONNX tracing a single decoder step (sequence length == 1)
# the transpose is a no-op copy before view, thus unnecessary
attn = attn.contiguous().view(tgt_len, bsz, self.embed_dim)
else:
attn = attn.transpose(0, 1).contiguous().view(tgt_len, bsz, self.embed_dim)
if self.attn_ln is not None:
attn = self.attn_ln(attn)
attn = self.out_proj(attn)
attn_weights: Optional[Tensor] = None
if need_weights:
attn_weights = attn_weights_float.view(
bsz, self.num_heads, tgt_len, src_len
).transpose(1, 0)
if not need_head_weights:
# average attention weights over heads
attn_weights = attn_weights.mean(dim=0)
return attn, attn_weights
@staticmethod
def _append_prev_key_padding_mask(
key_padding_mask: Optional[Tensor],
prev_key_padding_mask: Optional[Tensor],
batch_size: int,
src_len: int,
static_kv: bool,
) -> Optional[Tensor]:
# saved key padding masks have shape (bsz, seq_len)
if prev_key_padding_mask is not None and static_kv:
new_key_padding_mask = prev_key_padding_mask
elif prev_key_padding_mask is not None and key_padding_mask is not None:
new_key_padding_mask = torch.cat(
[prev_key_padding_mask.float(), key_padding_mask.float()], dim=1
)
# During incremental decoding, as the padding token enters and
# leaves the frame, there will be a time when prev or current
# is None
elif prev_key_padding_mask is not None:
if src_len > prev_key_padding_mask.size(1):
filler = torch.zeros(
(batch_size, src_len - prev_key_padding_mask.size(1)),
device=prev_key_padding_mask.device,
)
new_key_padding_mask = torch.cat(
[prev_key_padding_mask.float(), filler.float()], dim=1
)
else:
new_key_padding_mask = prev_key_padding_mask.float()
elif key_padding_mask is not None:
if src_len > key_padding_mask.size(1):
filler = torch.zeros(
(batch_size, src_len - key_padding_mask.size(1)),
device=key_padding_mask.device,
)
new_key_padding_mask = torch.cat(
[filler.float(), key_padding_mask.float()], dim=1
)
else:
new_key_padding_mask = key_padding_mask.float()
else:
new_key_padding_mask = prev_key_padding_mask
return new_key_padding_mask
@torch.jit.export
def reorder_incremental_state(
self,
incremental_state: Dict[str, Dict[str, Optional[Tensor]]],
new_order: Tensor,
):
"""Reorder buffered internal state (for incremental generation)."""
input_buffer = self._get_input_buffer(incremental_state)
if input_buffer is not None:
for k in input_buffer.keys():
input_buffer_k = input_buffer[k]
if input_buffer_k is not None:
if self.encoder_decoder_attention and input_buffer_k.size(
0
) == new_order.size(0):
break
input_buffer[k] = input_buffer_k.index_select(0, new_order)
incremental_state = self._set_input_buffer(incremental_state, input_buffer)
return incremental_state
def _get_input_buffer(
self, incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]]
) -> Dict[str, Optional[Tensor]]:
result = self.get_incremental_state(incremental_state, "attn_state")
if result is not None:
return result
else:
empty_result: Dict[str, Optional[Tensor]] = {}
return empty_result
def _set_input_buffer(
self,
incremental_state: Dict[str, Dict[str, Optional[Tensor]]],
buffer: Dict[str, Optional[Tensor]],
):
return self.set_incremental_state(incremental_state, "attn_state", buffer)
def apply_sparse_mask(self, attn_weights, tgt_len: int, src_len: int, bsz: int):
return attn_weights
def upgrade_state_dict_named(self, state_dict, name):
prefix = name + "." if name != "" else ""
items_to_add = {}
keys_to_remove = []
for k in state_dict.keys():
if k.endswith(prefix + "in_proj_weight"):
# in_proj_weight used to be q + k + v with same dimensions
dim = int(state_dict[k].shape[0] / 3)
items_to_add[prefix + "q_proj.weight"] = state_dict[k][:dim]
items_to_add[prefix + "k_proj.weight"] = state_dict[k][dim : 2 * dim]
items_to_add[prefix + "v_proj.weight"] = state_dict[k][2 * dim :]
keys_to_remove.append(k)
k_bias = prefix + "in_proj_bias"
if k_bias in state_dict.keys():
dim = int(state_dict[k].shape[0] / 3)
items_to_add[prefix + "q_proj.bias"] = state_dict[k_bias][:dim]
items_to_add[prefix + "k_proj.bias"] = state_dict[k_bias][
dim : 2 * dim
]
items_to_add[prefix + "v_proj.bias"] = state_dict[k_bias][2 * dim :]
keys_to_remove.append(prefix + "in_proj_bias")
for k in keys_to_remove:
del state_dict[k]
for key, value in items_to_add.items():
state_dict[key] = value
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/multihead_attention.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from __future__ import absolute_import, division, print_function, unicode_literals
from collections.abc import Iterable
from itertools import repeat
import torch
import torch.nn as nn
def _pair(v):
if isinstance(v, Iterable):
assert len(v) == 2, "len(v) != 2"
return v
return tuple(repeat(v, 2))
def infer_conv_output_dim(conv_op, input_dim, sample_inchannel):
sample_seq_len = 200
sample_bsz = 10
x = torch.randn(sample_bsz, sample_inchannel, sample_seq_len, input_dim)
# N x C x H x W
# N: sample_bsz, C: sample_inchannel, H: sample_seq_len, W: input_dim
x = conv_op(x)
# N x C x H x W
x = x.transpose(1, 2)
# N x H x C x W
bsz, seq = x.size()[:2]
per_channel_dim = x.size()[3]
# bsz: N, seq: H, CxW the rest
return x.contiguous().view(bsz, seq, -1).size(-1), per_channel_dim
class VGGBlock(torch.nn.Module):
"""
VGG motibated cnn module https://arxiv.org/pdf/1409.1556.pdf
Args:
in_channels: (int) number of input channels (typically 1)
out_channels: (int) number of output channels
conv_kernel_size: convolution channels
pooling_kernel_size: the size of the pooling window to take a max over
num_conv_layers: (int) number of convolution layers
input_dim: (int) input dimension
conv_stride: the stride of the convolving kernel.
Can be a single number or a tuple (sH, sW) Default: 1
padding: implicit paddings on both sides of the input.
Can be a single number or a tuple (padH, padW). Default: None
layer_norm: (bool) if layer norm is going to be applied. Default: False
Shape:
Input: BxCxTxfeat, i.e. (batch_size, input_size, timesteps, features)
Output: BxCxTxfeat, i.e. (batch_size, input_size, timesteps, features)
"""
def __init__(
self,
in_channels,
out_channels,
conv_kernel_size,
pooling_kernel_size,
num_conv_layers,
input_dim,
conv_stride=1,
padding=None,
layer_norm=False,
):
assert (
input_dim is not None
), "Need input_dim for LayerNorm and infer_conv_output_dim"
super(VGGBlock, self).__init__()
self.in_channels = in_channels
self.out_channels = out_channels
self.conv_kernel_size = _pair(conv_kernel_size)
self.pooling_kernel_size = _pair(pooling_kernel_size)
self.num_conv_layers = num_conv_layers
self.padding = (
tuple(e // 2 for e in self.conv_kernel_size)
if padding is None
else _pair(padding)
)
self.conv_stride = _pair(conv_stride)
self.layers = nn.ModuleList()
for layer in range(num_conv_layers):
conv_op = nn.Conv2d(
in_channels if layer == 0 else out_channels,
out_channels,
self.conv_kernel_size,
stride=self.conv_stride,
padding=self.padding,
)
self.layers.append(conv_op)
if layer_norm:
conv_output_dim, per_channel_dim = infer_conv_output_dim(
conv_op, input_dim, in_channels if layer == 0 else out_channels
)
self.layers.append(nn.LayerNorm(per_channel_dim))
input_dim = per_channel_dim
self.layers.append(nn.ReLU())
if self.pooling_kernel_size is not None:
pool_op = nn.MaxPool2d(kernel_size=self.pooling_kernel_size, ceil_mode=True)
self.layers.append(pool_op)
self.total_output_dim, self.output_dim = infer_conv_output_dim(
pool_op, input_dim, out_channels
)
def forward(self, x):
for i, _ in enumerate(self.layers):
x = self.layers[i](x)
return x
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/vggblock.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Dict, Optional
import torch
import torch.nn as nn
import torch.nn.functional as F
from fairseq import utils
from torch import Tensor
class LearnedPositionalEmbedding(nn.Embedding):
"""
This module learns positional embeddings up to a fixed maximum size.
Padding ids are ignored by either offsetting based on padding_idx
or by setting padding_idx to None and ensuring that the appropriate
position ids are passed to the forward function.
"""
def __init__(self, num_embeddings: int, embedding_dim: int, padding_idx: int):
super().__init__(num_embeddings, embedding_dim, padding_idx)
self.onnx_trace = False
if self.padding_idx is not None:
self.max_positions = self.num_embeddings - self.padding_idx - 1
else:
self.max_positions = self.num_embeddings
def forward(
self,
input: Tensor,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
positions: Optional[Tensor] = None,
):
"""Input is expected to be of size [bsz x seqlen]."""
assert (positions is None) or (
self.padding_idx is None
), "If positions is pre-computed then padding_idx should not be set."
if positions is None:
if incremental_state is not None and len(incremental_state) > 0:
# positions is the same for every token when decoding a single step
# Without the int() cast, it doesn't work in some cases when exporting to ONNX
positions = torch.zeros(
(1, 1), device=input.device, dtype=input.dtype
).fill_(int(self.padding_idx + input.size(1)))
else:
positions = utils.make_positions(
input, self.padding_idx, onnx_trace=self.onnx_trace
)
return F.embedding(
positions,
self.weight,
self.padding_idx,
self.max_norm,
self.norm_type,
self.scale_grad_by_freq,
self.sparse,
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/learned_positional_embedding.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
class GradMultiply(torch.autograd.Function):
@staticmethod
def forward(ctx, x, scale):
ctx.scale = scale
res = x.new(x)
return res
@staticmethod
def backward(ctx, grad):
return grad * ctx.scale, None
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/grad_multiply.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import logging
from typing import List, Tuple
import torch
import torch.nn.functional as F
from fairseq.data import Dictionary
from torch import nn
CHAR_PAD_IDX = 0
CHAR_EOS_IDX = 257
logger = logging.getLogger(__name__)
class CharacterTokenEmbedder(torch.nn.Module):
def __init__(
self,
vocab: Dictionary,
filters: List[Tuple[int, int]],
char_embed_dim: int,
word_embed_dim: int,
highway_layers: int,
max_char_len: int = 50,
char_inputs: bool = False,
):
super(CharacterTokenEmbedder, self).__init__()
self.onnx_trace = False
self.embedding_dim = word_embed_dim
self.max_char_len = max_char_len
self.char_embeddings = nn.Embedding(257, char_embed_dim, padding_idx=0)
self.symbol_embeddings = nn.Parameter(torch.FloatTensor(2, word_embed_dim))
self.eos_idx, self.unk_idx = 0, 1
self.char_inputs = char_inputs
self.convolutions = nn.ModuleList()
for width, out_c in filters:
self.convolutions.append(
nn.Conv1d(char_embed_dim, out_c, kernel_size=width)
)
last_dim = sum(f[1] for f in filters)
self.highway = Highway(last_dim, highway_layers) if highway_layers > 0 else None
self.projection = nn.Linear(last_dim, word_embed_dim)
assert (
vocab is not None or char_inputs
), "vocab must be set if not using char inputs"
self.vocab = None
if vocab is not None:
self.set_vocab(vocab, max_char_len)
self.reset_parameters()
def prepare_for_onnx_export_(self):
self.onnx_trace = True
def set_vocab(self, vocab, max_char_len):
word_to_char = torch.LongTensor(len(vocab), max_char_len)
truncated = 0
for i in range(len(vocab)):
if i < vocab.nspecial:
char_idxs = [0] * max_char_len
else:
chars = vocab[i].encode()
# +1 for padding
char_idxs = [c + 1 for c in chars] + [0] * (max_char_len - len(chars))
if len(char_idxs) > max_char_len:
truncated += 1
char_idxs = char_idxs[:max_char_len]
word_to_char[i] = torch.LongTensor(char_idxs)
if truncated > 0:
logger.info(
"truncated {} words longer than {} characters".format(
truncated, max_char_len
)
)
self.vocab = vocab
self.word_to_char = word_to_char
@property
def padding_idx(self):
return Dictionary().pad() if self.vocab is None else self.vocab.pad()
def reset_parameters(self):
nn.init.xavier_normal_(self.char_embeddings.weight)
nn.init.xavier_normal_(self.symbol_embeddings)
nn.init.xavier_uniform_(self.projection.weight)
nn.init.constant_(
self.char_embeddings.weight[self.char_embeddings.padding_idx], 0.0
)
nn.init.constant_(self.projection.bias, 0.0)
def forward(
self,
input: torch.Tensor,
):
if self.char_inputs:
chars = input.view(-1, self.max_char_len)
pads = chars[:, 0].eq(CHAR_PAD_IDX)
eos = chars[:, 0].eq(CHAR_EOS_IDX)
if eos.any():
if self.onnx_trace:
chars = torch.where(eos.unsqueeze(1), chars.new_zeros(1), chars)
else:
chars[eos] = 0
unk = None
else:
flat_words = input.view(-1)
chars = self.word_to_char[flat_words.type_as(self.word_to_char)].type_as(
input
)
pads = flat_words.eq(self.vocab.pad())
eos = flat_words.eq(self.vocab.eos())
unk = flat_words.eq(self.vocab.unk())
word_embs = self._convolve(chars)
if self.onnx_trace:
if pads.any():
word_embs = torch.where(
pads.unsqueeze(1), word_embs.new_zeros(1), word_embs
)
if eos.any():
word_embs = torch.where(
eos.unsqueeze(1), self.symbol_embeddings[self.eos_idx], word_embs
)
if unk is not None and unk.any():
word_embs = torch.where(
unk.unsqueeze(1), self.symbol_embeddings[self.unk_idx], word_embs
)
else:
if pads.any():
word_embs[pads] = 0
if eos.any():
word_embs[eos] = self.symbol_embeddings[self.eos_idx]
if unk is not None and unk.any():
word_embs[unk] = self.symbol_embeddings[self.unk_idx]
return word_embs.view(input.size()[:2] + (-1,))
def _convolve(
self,
char_idxs: torch.Tensor,
):
char_embs = self.char_embeddings(char_idxs)
char_embs = char_embs.transpose(1, 2) # BTC -> BCT
conv_result = []
for conv in self.convolutions:
x = conv(char_embs)
x, _ = torch.max(x, -1)
x = F.relu(x)
conv_result.append(x)
x = torch.cat(conv_result, dim=-1)
if self.highway is not None:
x = self.highway(x)
x = self.projection(x)
return x
class Highway(torch.nn.Module):
"""
A `Highway layer <https://arxiv.org/abs/1505.00387>`_.
Adopted from the AllenNLP implementation.
"""
def __init__(self, input_dim: int, num_layers: int = 1):
super(Highway, self).__init__()
self.input_dim = input_dim
self.layers = nn.ModuleList(
[nn.Linear(input_dim, input_dim * 2) for _ in range(num_layers)]
)
self.activation = nn.ReLU()
self.reset_parameters()
def reset_parameters(self):
for layer in self.layers:
# As per comment in AllenNLP:
# We should bias the highway layer to just carry its input forward. We do that by
# setting the bias on `B(x)` to be positive, because that means `g` will be biased to
# be high, so we will carry the input forward. The bias on `B(x)` is the second half
# of the bias vector in each Linear layer.
nn.init.constant_(layer.bias[self.input_dim :], 1)
nn.init.constant_(layer.bias[: self.input_dim], 0)
nn.init.xavier_normal_(layer.weight)
def forward(self, x: torch.Tensor):
for layer in self.layers:
projection = layer(x)
proj_x, gate = projection.chunk(2, dim=-1)
proj_x = self.activation(proj_x)
gate = torch.sigmoid(gate)
x = gate * x + (gate.new_tensor([1]) - gate) * proj_x
return x
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/character_token_embedder.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import functools
from typing import Any, Dict, List, Tuple, Union
import torch
import torch.utils.checkpoint as checkpoint
from fairseq import utils
def checkpoint_wrapper(m, offload_to_cpu=False):
"""
A friendlier wrapper for performing activation checkpointing.
Compared to the PyTorch version, this version:
- wraps an nn.Module, so that all subsequent calls will use checkpointing
- handles keyword arguments in the forward
- handles non-Tensor outputs from the forward
Usage::
checkpointed_module = checkpoint_wrapper(my_module, offload_to_cpu=True)
a, b = checkpointed_module(x, y=3, z=torch.Tensor([1]))
"""
# should I check whether original_forward has already been set?
assert not hasattr(
m, "precheckpoint_forward"
), "checkpoint function has already been applied?"
m.precheckpoint_forward = m.forward
m.forward = functools.partial(
_checkpointed_forward,
m.precheckpoint_forward, # original_forward
offload_to_cpu,
)
return m
def unwrap_checkpoint(m: torch.nn.Module):
"""
unwrap a module and its children from checkpoint_wrapper
"""
for module in m.modules():
if hasattr(module, "precheckpoint_forward"):
module.forward = module.precheckpoint_forward
del module.precheckpoint_forward
if hasattr(module, "old_deepcopy_method"):
module.__deepcopy__ = module.old_deepcopy_method
del module.old_deepcopy_method
return m
def _checkpointed_forward(original_forward, offload_to_cpu, *args, **kwargs):
# Autograd Functions in PyTorch work best with positional args, since
# the backward must return gradients (or None) for every input argument.
# We can flatten keyword arguments to make this easier.
kwarg_keys, flat_args = pack_kwargs(*args, **kwargs)
parent_ctx_dict = {"offload": offload_to_cpu}
output = CheckpointFunction.apply(
original_forward, parent_ctx_dict, kwarg_keys, *flat_args
)
if isinstance(output, torch.Tensor):
return output
else:
packed_non_tensor_outputs = parent_ctx_dict["packed_non_tensor_outputs"]
if packed_non_tensor_outputs:
output = unpack_non_tensors(output, packed_non_tensor_outputs)
return output
def pack_kwargs(*args, **kwargs) -> Tuple[List[str], List[Any]]:
"""
Usage::
kwarg_keys, flat_args = pack_kwargs(1, 2, a=3, b=4)
args, kwargs = unpack_kwargs(kwarg_keys, flat_args)
assert args == [1, 2]
assert kwargs == {"a": 3, "b": 4}
"""
kwarg_keys = []
flat_args = list(args)
for k, v in kwargs.items():
kwarg_keys.append(k)
flat_args.append(v)
return kwarg_keys, flat_args
def unpack_kwargs(
kwarg_keys: List[str], flat_args: List[Any]
) -> Tuple[List[Any], Dict[str, Any]]:
if len(kwarg_keys) == 0:
return flat_args, {}
args = flat_args[: -len(kwarg_keys)]
kwargs = {k: v for k, v in zip(kwarg_keys, flat_args[-len(kwarg_keys) :])}
return args, kwargs
def split_non_tensors(
mixed: Union[torch.Tensor, Tuple[Any]]
) -> Tuple[Tuple[torch.Tensor], Dict[str, List[Any]]]:
"""
Usage::
x = torch.Tensor([1])
y = torch.Tensor([2])
tensors, packed_non_tensors = split_non_tensors((x, y, None, 3))
recon = unpack_non_tensors(tensors, packed_non_tensors)
assert recon == (x, y, None, 3)
"""
if isinstance(mixed, torch.Tensor):
return (mixed,), None
tensors = []
packed_non_tensors = {"is_tensor": [], "objects": []}
for o in mixed:
if isinstance(o, torch.Tensor):
packed_non_tensors["is_tensor"].append(True)
tensors.append(o)
else:
packed_non_tensors["is_tensor"].append(False)
packed_non_tensors["objects"].append(o)
return tuple(tensors), packed_non_tensors
def unpack_non_tensors(
tensors: Tuple[torch.Tensor],
packed_non_tensors: Dict[str, List[Any]],
) -> Tuple[Any]:
if packed_non_tensors is None:
return tensors
assert isinstance(packed_non_tensors, dict)
mixed = []
is_tensor_list = packed_non_tensors["is_tensor"]
objects = packed_non_tensors["objects"]
assert len(tensors) + len(objects) == len(is_tensor_list)
obj_i = tnsr_i = 0
for is_tensor in is_tensor_list:
if is_tensor:
mixed.append(tensors[tnsr_i])
tnsr_i += 1
else:
mixed.append(objects[obj_i])
obj_i += 1
return tuple(mixed)
class CheckpointFunction(torch.autograd.Function):
"""Similar to the torch version, but support non-Tensor outputs.
The caller is expected to provide a dict (*parent_ctx_dict*) that will hold
the non-Tensor outputs. These should be combined with the Tensor *outputs*
by calling ``unpack_non_tensors``.
"""
@staticmethod
def forward(ctx, run_function, parent_ctx_dict, kwarg_keys, *args):
if torch.is_grad_enabled(): # grad may be disabled, e.g., during validation
checkpoint.check_backward_validity(args)
ctx.run_function = run_function
ctx.kwarg_keys = kwarg_keys
ctx.fwd_rng_state = utils.get_rng_state()
tensor_inputs, packed_non_tensor_inputs = split_non_tensors(args)
if parent_ctx_dict["offload"]:
ctx.fwd_device = tuple(x.device for x in tensor_inputs)
ctx.grad_requirements = tuple(x.requires_grad for x in tensor_inputs)
tensor_inputs = tuple(
x.to(torch.device("cpu"), non_blocking=True) for x in tensor_inputs
)
else:
ctx.fwd_device, ctx.grad_requirements = None, None
ctx.save_for_backward(*tensor_inputs)
ctx.packed_non_tensor_inputs = packed_non_tensor_inputs
with torch.no_grad():
unpacked_args, unpacked_kwargs = unpack_kwargs(kwarg_keys, args)
outputs = run_function(*unpacked_args, **unpacked_kwargs)
if isinstance(outputs, torch.Tensor):
return outputs
else:
# Autograd Functions don't like non-Tensor outputs. We can split the
# non-Tensor and Tensor outputs, returning the former by reference
# through *parent_ctx_dict* and returning the latter directly.
outputs, packed_non_tensor_outputs = split_non_tensors(outputs)
parent_ctx_dict["packed_non_tensor_outputs"] = packed_non_tensor_outputs
return outputs
@staticmethod
def backward(ctx, *args):
if not torch.autograd._is_checkpoint_valid():
raise RuntimeError(
"Checkpointing is not compatible with .grad(), please use .backward() if possible"
)
tensor_inputs: Tuple = ctx.saved_tensors
tensor_inputs = checkpoint.detach_variable(tensor_inputs)
if ctx.fwd_device is not None:
tensor_inputs = [
t.to(ctx.fwd_device[i], non_blocking=True)
for i, t in enumerate(tensor_inputs)
]
for i, need_grad in enumerate(ctx.grad_requirements):
tensor_inputs[i].requires_grad = need_grad
inputs = unpack_non_tensors(tensor_inputs, ctx.packed_non_tensor_inputs)
# Store the current states.
bwd_rng_state = utils.get_rng_state()
# Set the states to what it used to be before the forward pass.
utils.set_rng_state(ctx.fwd_rng_state)
with torch.enable_grad():
unpacked_args, unpacked_kwargs = unpack_kwargs(ctx.kwarg_keys, inputs)
outputs = ctx.run_function(*unpacked_args, **unpacked_kwargs)
tensor_outputs, _ = split_non_tensors(outputs)
# Set the states back to what it was at the start of this function.
utils.set_rng_state(bwd_rng_state)
# Run backward() with only Tensors that require grad
outputs_with_grad = []
args_with_grad = []
for i in range(len(tensor_outputs)):
if tensor_outputs[i].requires_grad:
outputs_with_grad.append(tensor_outputs[i])
args_with_grad.append(args[i])
if len(outputs_with_grad) == 0:
raise RuntimeError(
"None of the outputs have requires_grad=True, "
"this checkpoint() is not necessary"
)
torch.autograd.backward(outputs_with_grad, args_with_grad)
grads = tuple(
inp.grad if isinstance(inp, torch.Tensor) else None for inp in inputs
)
return (None, None, None) + grads
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/checkpoint_activations.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from fairseq.modules import TransformerSentenceEncoderLayer
from fairseq.modules.sparse_multihead_attention import SparseMultiheadAttention
class SparseTransformerSentenceEncoderLayer(TransformerSentenceEncoderLayer):
"""
Implements a Sprase Transformer Encoder Layer (see SparseMultiheadAttention)
"""
def __init__(
self,
embedding_dim: int = 768,
ffn_embedding_dim: int = 3072,
num_attention_heads: int = 8,
dropout: float = 0.1,
attention_dropout: float = 0.1,
activation_dropout: float = 0.1,
activation_fn: str = "relu",
export: bool = False,
is_bidirectional: bool = True,
stride: int = 32,
expressivity: int = 8,
) -> None:
super().__init__(
embedding_dim,
ffn_embedding_dim,
num_attention_heads,
dropout,
attention_dropout,
activation_dropout,
activation_fn,
export,
)
self.self_attn = SparseMultiheadAttention(
self.embedding_dim,
num_attention_heads,
dropout=attention_dropout,
add_bias_kv=False,
add_zero_attn=False,
self_attention=True,
is_bidirectional=is_bidirectional,
stride=stride,
expressivity=expressivity,
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/sparse_transformer_sentence_encoder_layer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import functools
import operator
import torch
import torch.nn.functional as F
from fairseq.modules.fairseq_dropout import FairseqDropout
from fairseq.modules.quant_noise import quant_noise
from torch import nn
class TiedLinear(nn.Module):
def __init__(self, weight, transpose):
super().__init__()
self.weight = weight
self.transpose = transpose
def forward(self, input):
return F.linear(input, self.weight.t() if self.transpose else self.weight)
class TiedHeadModule(nn.Module):
def __init__(self, weights, input_dim, num_classes, q_noise, qn_block_size):
super().__init__()
tied_emb, _ = weights
self.num_words, emb_dim = tied_emb.size()
self.word_proj = quant_noise(
TiedLinear(tied_emb, transpose=False), q_noise, qn_block_size
)
if input_dim != emb_dim:
self.word_proj = nn.Sequential(
quant_noise(
nn.Linear(input_dim, emb_dim, bias=False), q_noise, qn_block_size
),
self.word_proj,
)
self.class_proj = quant_noise(
nn.Linear(input_dim, num_classes, bias=False), q_noise, qn_block_size
)
self.out_dim = self.num_words + num_classes
self.register_buffer("_float_tensor", torch.FloatTensor(1))
def forward(self, input):
inp_sz = functools.reduce(operator.mul, input.shape[:-1], 1)
out = self._float_tensor.new(inp_sz, self.out_dim)
out[:, : self.num_words] = self.word_proj(input.view(inp_sz, -1))
out[:, self.num_words :] = self.class_proj(input.view(inp_sz, -1))
return out
class AdaptiveSoftmax(nn.Module):
"""
This is an implementation of the efficient softmax approximation for
graphical processing units (GPU), described in the paper "Efficient softmax
approximation for GPUs" (http://arxiv.org/abs/1609.04309).
"""
def __init__(
self,
vocab_size,
input_dim,
cutoff,
dropout,
factor=4.0,
adaptive_inputs=None,
tie_proj=False,
q_noise=0,
qn_block_size=8,
):
super().__init__()
if vocab_size > cutoff[-1]:
cutoff = cutoff + [vocab_size]
else:
assert (
vocab_size == cutoff[-1]
), "cannot specify cutoff larger than vocab size"
output_dim = cutoff[0] + len(cutoff) - 1
self.vocab_size = vocab_size
self.cutoff = cutoff
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.input_dim = input_dim
self.factor = factor
self.q_noise = q_noise
self.qn_block_size = qn_block_size
self.lsm = nn.LogSoftmax(dim=1)
if adaptive_inputs is not None:
self.head = TiedHeadModule(
adaptive_inputs.weights_for_band(0),
input_dim,
len(cutoff) - 1,
self.q_noise,
self.qn_block_size,
)
else:
self.head = quant_noise(
nn.Linear(input_dim, output_dim, bias=False),
self.q_noise,
self.qn_block_size,
)
self._make_tail(adaptive_inputs, tie_proj)
def init_weights(m):
if (
hasattr(m, "weight")
and not isinstance(m, TiedLinear)
and not isinstance(m, TiedHeadModule)
):
nn.init.xavier_uniform_(m.weight)
self.apply(init_weights)
self.register_buffer("version", torch.LongTensor([1]))
def _make_tail(self, adaptive_inputs=None, tie_proj=False):
self.tail = nn.ModuleList()
for i in range(len(self.cutoff) - 1):
dim = int(self.input_dim // self.factor ** (i + 1))
tied_emb, tied_proj = (
adaptive_inputs.weights_for_band(i + 1)
if adaptive_inputs is not None
else (None, None)
)
if tied_proj is not None:
if tie_proj:
proj = quant_noise(
TiedLinear(tied_proj, transpose=True),
self.q_noise,
self.qn_block_size,
)
else:
proj = quant_noise(
nn.Linear(tied_proj.size(0), tied_proj.size(1), bias=False),
self.q_noise,
self.qn_block_size,
)
else:
proj = quant_noise(
nn.Linear(self.input_dim, dim, bias=False),
self.q_noise,
self.qn_block_size,
)
if tied_emb is None:
out_proj = nn.Linear(
dim, self.cutoff[i + 1] - self.cutoff[i], bias=False
)
else:
out_proj = TiedLinear(tied_emb, transpose=False)
m = nn.Sequential(
proj,
nn.Dropout(self.dropout_module.p),
quant_noise(out_proj, self.q_noise, self.qn_block_size),
)
self.tail.append(m)
def upgrade_state_dict_named(self, state_dict, name):
version_name = name + ".version"
if version_name not in state_dict:
raise Exception("This version of the model is no longer supported")
def adapt_target(self, target):
"""
In order to be efficient, the AdaptiveSoftMax does not compute the
scores for all the word of the vocabulary for all the examples. It is
thus necessary to call the method adapt_target of the AdaptiveSoftMax
layer inside each forward pass.
"""
target = target.view(-1)
new_target = [target.clone()]
target_idxs = []
for i in range(len(self.cutoff) - 1):
mask = target.ge(self.cutoff[i]).mul(target.lt(self.cutoff[i + 1]))
new_target[0][mask] = self.cutoff[0] + i
if mask.any():
target_idxs.append(mask.nonzero(as_tuple=False).squeeze(1))
new_target.append(target[mask].add(-self.cutoff[i]))
else:
target_idxs.append(None)
new_target.append(None)
return new_target, target_idxs
def forward(self, input, target):
"""
Args:
input: (b x t x d)
target: (b x t)
Returns:
2 lists: output for each cutoff section and new targets by cut off
"""
input = input.contiguous().view(-1, input.size(-1))
input = self.dropout_module(input)
new_target, target_idxs = self.adapt_target(target)
output = [self.head(input)]
for i in range(len(target_idxs)):
if target_idxs[i] is not None:
output.append(self.tail[i](input.index_select(0, target_idxs[i])))
else:
output.append(None)
return output, new_target
def get_log_prob(self, input, target):
"""
Computes the log probabilities for all the words of the vocabulary,
given a 2D tensor of hidden vectors.
"""
bsz, length, dim = input.size()
input = input.contiguous().view(-1, dim)
if target is not None:
_, target_idxs = self.adapt_target(target)
else:
target_idxs = None
head_y = self.head(input)
log_probs = head_y.new_zeros(input.size(0), self.vocab_size)
head_sz = self.cutoff[0] + len(self.tail)
log_probs[:, :head_sz] = self.lsm(head_y)
tail_priors = log_probs[:, self.cutoff[0] : head_sz].clone()
for i in range(len(self.tail)):
start = self.cutoff[i]
end = self.cutoff[i + 1]
if target_idxs is None:
tail_out = log_probs[:, start:end]
tail_out.copy_(self.tail[i](input))
log_probs[:, start:end] = self.lsm(tail_out).add_(
tail_priors[:, i, None]
)
elif target_idxs[i] is not None:
idxs = target_idxs[i]
tail_out = log_probs[idxs, start:end]
tail_out.copy_(self.tail[i](input[idxs]))
log_probs[idxs, start:end] = self.lsm(tail_out).add_(
tail_priors[idxs, i, None]
)
log_probs = log_probs.view(bsz, length, -1)
return log_probs
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/adaptive_softmax.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
from torch import nn
from torch.nn.modules.utils import _single
from torch import Tensor
class ConvTBC(torch.nn.Module):
"""1D convolution over an input of shape (time x batch x channel)
The implementation uses gemm to perform the convolution. This implementation
is faster than cuDNN for small kernel sizes.
"""
def __init__(self, in_channels, out_channels, kernel_size, padding=0):
super(ConvTBC, self).__init__()
self.in_channels = in_channels
self.out_channels = out_channels
self.kernel_size = _single(kernel_size)
self.padding = _single(padding)
self.weight = torch.nn.Parameter(
torch.Tensor(self.kernel_size[0], in_channels, out_channels)
)
self.bias = torch.nn.Parameter(torch.Tensor(out_channels))
self.reset_parameters()
def reset_parameters(self):
nn.init.xavier_normal_(self.weight)
nn.init.zeros_(self.bias)
def conv_tbc(self, input: Tensor):
return torch.conv_tbc(
input.contiguous(), self.weight, self.bias, self.padding[0]
)
def forward(self, input: Tensor):
return self.conv_tbc(input)
def __repr__(self):
s = (
"{name}({in_channels}, {out_channels}, kernel_size={kernel_size}"
", padding={padding}"
)
if self.bias is None:
s += ", bias=False"
s += ")"
return s.format(name=self.__class__.__name__, **self.__dict__)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/conv_tbc.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
batch norm done in fp32 (for fp16 training)
"""
import torch
import torch.nn as nn
class Fp32BatchNorm(nn.Module):
def __init__(self, sync=False, *args, **kwargs):
super().__init__()
if sync:
from fairseq.distributed import utils
if utils.get_global_world_size() == 1:
sync = False
if sync:
self.bn = nn.SyncBatchNorm(*args, **kwargs)
else:
self.bn = nn.BatchNorm1d(*args, **kwargs)
self.sync = sync
def forward(self, input):
if self.bn.running_mean.dtype != torch.float:
if self.sync:
self.bn.running_mean = self.bn.running_mean.float()
self.bn.running_var = self.bn.running_var.float()
if self.bn.affine:
try:
self.bn.weight = self.bn.weight.float()
self.bn.bias = self.bn.bias.float()
except:
self.bn.float()
else:
self.bn.float()
output = self.bn(input.float())
return output.type_as(input)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/fp32_batch_norm.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
Layer norm done in fp32 (for fp16 training)
"""
import torch.nn as nn
import torch.nn.functional as F
class Fp32InstanceNorm(nn.InstanceNorm1d):
def __init__(self, *args, **kwargs):
self.transpose_last = "transpose_last" in kwargs and kwargs["transpose_last"]
if "transpose_last" in kwargs:
del kwargs["transpose_last"]
super().__init__(*args, **kwargs)
def forward(self, input):
if self.transpose_last:
input = input.transpose(1, 2)
output = F.instance_norm(
input.float(),
running_mean=self.running_mean,
running_var=self.running_var,
weight=self.weight.float() if self.weight is not None else None,
bias=self.bias.float() if self.bias is not None else None,
use_input_stats=self.training or not self.track_running_stats,
momentum=self.momentum,
eps=self.eps,
)
if self.transpose_last:
output = output.transpose(1, 2)
return output.type_as(input)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/fp32_instance_norm.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch.nn.functional as F
def unfold1d(x, kernel_size, padding_l, pad_value=0):
"""unfold T x B x C to T x B x C x K"""
if kernel_size > 1:
T, B, C = x.size()
x = F.pad(
x, (0, 0, 0, 0, padding_l, kernel_size - 1 - padding_l), value=pad_value
)
x = x.as_strided((T, B, C, kernel_size), (B * C, C, 1, B * C))
else:
x = x.unsqueeze(3)
return x
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/unfold.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch.nn as nn
import torch
import sys
from fairseq import utils
from fairseq.distributed import utils as distributed_utils
from fairseq.modules.layer_norm import LayerNorm
class BaseLayer(nn.Module):
def __init__(self, args):
super().__init__()
self.num_workers = distributed_utils.get_data_parallel_world_size()
expert_centroids = torch.empty(self.num_workers, args.decoder_embed_dim)
torch.nn.init.orthogonal_(expert_centroids, gain=0.1)
self.register_parameter(
"expert_centroids", torch.nn.Parameter(expert_centroids)
)
self.expert_network = nn.Sequential(
*([BaseSublayer(args) for _ in range(args.base_sublayers)])
)
self.expert_id = distributed_utils.get_data_parallel_rank()
self.shuffle = args.base_shuffle
self.cpp = self.load_assignment()
# Add a special attribute to the expert parameters, so we know not to sync their gradients
for param in self.expert_network.parameters():
param.expert = True
def forward(self, input_features, *args, **kwargs):
features = input_features.reshape(-1, input_features.size(-1))
is_training = input_features.requires_grad
if self.shuffle and is_training:
# Send each token to a random worker, to break correlations within the batch
shuffle_sort = torch.randperm(features.size(0), device=features.device)
features = All2All.apply(features[shuffle_sort])
with torch.no_grad():
# Compute similarity of each token to each expert, for routing
token_expert_affinities = features.matmul(
self.expert_centroids.transpose(0, 1)
)
# Compute which token goes to which expert
sort_by_expert, input_splits, output_splits = (
self.balanced_assignment(token_expert_affinities)
if is_training
else self.greedy_assignment(token_expert_affinities)
)
# Swap these tokens for the right ones for our expert
routed_features = All2All.apply(
features[sort_by_expert], output_splits, input_splits
)
if routed_features.size(0) > 0:
# Mix in the expert network based on how appropriate it is for these tokens
alpha = torch.sigmoid(
routed_features.mv(self.expert_centroids[self.expert_id])
).unsqueeze(1)
routed_features = (
alpha * self.expert_network(routed_features)
+ (1 - alpha) * routed_features
)
# Return to original worker and ordering
result = All2All.apply(routed_features, input_splits, output_splits)[
self.inverse_sort(sort_by_expert)
]
if self.shuffle and is_training:
# Undo shuffling
result = All2All.apply(result)[self.inverse_sort(shuffle_sort)]
# Return additional Nones for compatibility with TransformerDecoderLayer
return result.view(input_features.size()), None, None
def inverse_sort(self, order):
# Creates an index that undoes a sort: xs==xs[order][inverse_sort(order)]
return torch.empty_like(order).scatter_(
0, order, torch.arange(0, order.size(0), device=order.device)
)
def balanced_assignment(self, scores):
ok = scores.isfinite()
if not ok.all():
# NaNs here can break the assignment algorithm
scores[~ok] = scores[ok].min()
return self.cpp.balanced_assignment(scores), None, None
# Assigns each token to the top k experts
def greedy_assignment(self, scores, k=1):
token_to_workers = torch.topk(scores, dim=1, k=k, largest=True).indices.view(-1)
token_to_workers, sort_ordering = torch.sort(token_to_workers)
worker2token = sort_ordering // k
# Find how many tokens we're sending to each other worker (being careful for sending 0 tokens to some workers)
output_splits = torch.zeros(
(self.num_workers,), dtype=torch.long, device=scores.device
)
workers, counts = torch.unique_consecutive(token_to_workers, return_counts=True)
output_splits[workers] = counts
# Tell other workers how many tokens to expect from us
input_splits = All2All.apply(output_splits)
return worker2token, input_splits.tolist(), output_splits.tolist()
def load_assignment(self):
try:
from fairseq import libbase
return libbase
except ImportError as e:
sys.stderr.write(
"ERROR: missing libbase. run `python setup.py build_ext --inplace`\n"
)
raise e
class BaseSublayer(nn.Module):
def __init__(self, args):
super().__init__()
self.activation_fn = utils.get_activation_fn(
activation=getattr(args, "activation_fn", "relu") or "relu"
)
self.norm = LayerNorm(args.decoder_embed_dim, export=False)
self.ff1 = torch.nn.Linear(args.decoder_embed_dim, args.decoder_ffn_embed_dim)
self.ff2 = torch.nn.Linear(args.decoder_ffn_embed_dim, args.decoder_embed_dim)
self.ff2.weight.data.zero_()
def forward(self, xs):
return xs + self.ff2(self.activation_fn(self.ff1(self.norm(xs))))
# Wraps torch.distributed.all_to_all_single as a function that supports autograd
class All2All(torch.autograd.Function):
@staticmethod
def forward(ctx, xs, input_splits=None, output_splits=None):
ctx.input_splits = input_splits
ctx.output_splits = output_splits
ys = (
torch.empty_like(xs)
if output_splits is None
else xs.new_empty(size=[sum(output_splits)] + list(xs.size()[1:]))
)
torch.distributed.all_to_all_single(
ys, xs, output_split_sizes=output_splits, input_split_sizes=input_splits
)
return ys
@staticmethod
def backward(ctx, grad_output):
result = (
torch.empty_like(grad_output)
if ctx.input_splits is None
else grad_output.new_empty(
size=[sum(ctx.input_splits)] + list(grad_output.size()[1:])
)
)
torch.distributed.all_to_all_single(
result,
grad_output,
output_split_sizes=ctx.input_splits,
input_split_sizes=ctx.output_splits,
)
return result, None, None
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/base_layer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
This file is to re-implemented the low-rank and beam approximation of CRF layer
Proposed by:
Sun, Zhiqing, et al.
Fast Structured Decoding for Sequence Models
https://arxiv.org/abs/1910.11555
The CRF implementation is mainly borrowed from
https://github.com/kmkurn/pytorch-crf/blob/master/torchcrf/__init__.py
"""
import numpy as np
import torch
import torch.nn as nn
def logsumexp(x, dim=1):
return torch.logsumexp(x.float(), dim=dim).type_as(x)
class DynamicCRF(nn.Module):
"""Dynamic CRF layer is used to approximate the traditional
Conditional Random Fields (CRF)
$P(y | x) = 1/Z(x) exp(sum_i s(y_i, x) + sum_i t(y_{i-1}, y_i, x))$
where in this function, we assume the emition scores (s) are given,
and the transition score is a |V| x |V| matrix $M$
in the following two aspects:
(1) it used a low-rank approximation for the transition matrix:
$M = E_1 E_2^T$
(2) it used a beam to estimate the normalizing factor Z(x)
"""
def __init__(self, num_embedding, low_rank=32, beam_size=64):
super().__init__()
self.E1 = nn.Embedding(num_embedding, low_rank)
self.E2 = nn.Embedding(num_embedding, low_rank)
self.vocb = num_embedding
self.rank = low_rank
self.beam = beam_size
def extra_repr(self):
return "vocab_size={}, low_rank={}, beam_size={}".format(
self.vocb, self.rank, self.beam
)
def forward(self, emissions, targets, masks, beam=None):
"""
Compute the conditional log-likelihood of a sequence of target tokens given emission scores
Args:
emissions (`~torch.Tensor`): Emission score are usually the unnormalized decoder output
``(batch_size, seq_len, vocab_size)``. We assume batch-first
targets (`~torch.LongTensor`): Sequence of target token indices
``(batch_size, seq_len)
masks (`~torch.ByteTensor`): Mask tensor with the same size as targets
Returns:
`~torch.Tensor`: approximated log-likelihood
"""
numerator = self._compute_score(emissions, targets, masks)
denominator = self._compute_normalizer(emissions, targets, masks, beam)
return numerator - denominator
def forward_decoder(self, emissions, masks=None, beam=None):
"""
Find the most likely output sequence using Viterbi algorithm.
Args:
emissions (`~torch.Tensor`): Emission score are usually the unnormalized decoder output
``(batch_size, seq_len, vocab_size)``. We assume batch-first
masks (`~torch.ByteTensor`): Mask tensor with the same size as targets
Returns:
`~torch.LongTensor`: decoded sequence from the CRF model
"""
return self._viterbi_decode(emissions, masks, beam)
def _compute_score(self, emissions, targets, masks=None):
batch_size, seq_len = targets.size()
emission_scores = emissions.gather(2, targets[:, :, None])[:, :, 0] # B x T
transition_scores = (self.E1(targets[:, :-1]) * self.E2(targets[:, 1:])).sum(2)
scores = emission_scores
scores[:, 1:] += transition_scores
if masks is not None:
scores = scores * masks.type_as(scores)
return scores.sum(-1)
def _compute_normalizer(self, emissions, targets=None, masks=None, beam=None):
# HACK: we include "target" which is a hueristic for training
# HACK: we use a beam of tokens to approximate the normalizing factor (which is bad?)
beam = beam if beam is not None else self.beam
batch_size, seq_len = emissions.size()[:2]
if targets is not None:
_emissions = emissions.scatter(2, targets[:, :, None], np.float("inf"))
beam_targets = _emissions.topk(beam, 2)[1]
beam_emission_scores = emissions.gather(2, beam_targets)
else:
beam_emission_scores, beam_targets = emissions.topk(beam, 2)
beam_transition_score1 = self.E1(beam_targets[:, :-1]) # B x (T-1) x K x D
beam_transition_score2 = self.E2(beam_targets[:, 1:]) # B x (T-1) x K x D
beam_transition_matrix = torch.bmm(
beam_transition_score1.view(-1, beam, self.rank),
beam_transition_score2.view(-1, beam, self.rank).transpose(1, 2),
)
beam_transition_matrix = beam_transition_matrix.view(batch_size, -1, beam, beam)
# compute the normalizer in the log-space
score = beam_emission_scores[:, 0] # B x K
for i in range(1, seq_len):
next_score = score[:, :, None] + beam_transition_matrix[:, i - 1]
next_score = logsumexp(next_score, dim=1) + beam_emission_scores[:, i]
if masks is not None:
score = torch.where(masks[:, i : i + 1], next_score, score)
else:
score = next_score
# Sum (log-sum-exp) over all possible tags
return logsumexp(score, dim=1)
def _viterbi_decode(self, emissions, masks=None, beam=None):
# HACK: we use a beam of tokens to approximate the normalizing factor (which is bad?)
beam = beam if beam is not None else self.beam
batch_size, seq_len = emissions.size()[:2]
beam_emission_scores, beam_targets = emissions.topk(beam, 2)
beam_transition_score1 = self.E1(beam_targets[:, :-1]) # B x (T-1) x K x D
beam_transition_score2 = self.E2(beam_targets[:, 1:]) # B x (T-1) x K x D
beam_transition_matrix = torch.bmm(
beam_transition_score1.view(-1, beam, self.rank),
beam_transition_score2.view(-1, beam, self.rank).transpose(1, 2),
)
beam_transition_matrix = beam_transition_matrix.view(batch_size, -1, beam, beam)
traj_tokens, traj_scores = [], []
finalized_tokens, finalized_scores = [], []
# compute the normalizer in the log-space
score = beam_emission_scores[:, 0] # B x K
dummy = (
torch.arange(beam, device=score.device).expand(*score.size()).contiguous()
)
for i in range(1, seq_len):
traj_scores.append(score)
_score = score[:, :, None] + beam_transition_matrix[:, i - 1]
_score, _index = _score.max(dim=1)
_score = _score + beam_emission_scores[:, i]
if masks is not None:
score = torch.where(masks[:, i : i + 1], _score, score)
index = torch.where(masks[:, i : i + 1], _index, dummy)
else:
score, index = _score, _index
traj_tokens.append(index)
# now running the back-tracing and find the best
best_score, best_index = score.max(dim=1)
finalized_tokens.append(best_index[:, None])
finalized_scores.append(best_score[:, None])
for idx, scs in zip(reversed(traj_tokens), reversed(traj_scores)):
previous_index = finalized_tokens[-1]
finalized_tokens.append(idx.gather(1, previous_index))
finalized_scores.append(scs.gather(1, previous_index))
finalized_tokens.reverse()
finalized_tokens = torch.cat(finalized_tokens, 1)
finalized_tokens = beam_targets.gather(2, finalized_tokens[:, :, None])[:, :, 0]
finalized_scores.reverse()
finalized_scores = torch.cat(finalized_scores, 1)
finalized_scores[:, 1:] = finalized_scores[:, 1:] - finalized_scores[:, :-1]
return finalized_scores, finalized_tokens
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/dynamic_crf_layer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
See "Gaussian Error Linear Units (GELUs)" by Dan Hendrycks and Kevin Gimpel with
the corresponding GitHub repo: https://github.com/hendrycks/GELUs
"""
import math
import torch
def gelu_accurate(x):
if not hasattr(gelu_accurate, "_a"):
gelu_accurate._a = math.sqrt(2 / math.pi)
return (
0.5 * x * (1 + torch.tanh(gelu_accurate._a * (x + 0.044715 * torch.pow(x, 3))))
)
def gelu(x: torch.Tensor) -> torch.Tensor:
return torch.nn.functional.gelu(x.float()).type_as(x)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/gelu.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""
LayerDrop as described in https://arxiv.org/abs/1909.11556.
"""
import torch
import torch.nn as nn
class LayerDropModuleList(nn.ModuleList):
"""
A LayerDrop implementation based on :class:`torch.nn.ModuleList`.
We refresh the choice of which layers to drop every time we iterate
over the LayerDropModuleList instance. During evaluation we always
iterate over all layers.
Usage::
layers = LayerDropList(p=0.5, modules=[layer1, layer2, layer3])
for layer in layers: # this might iterate over layers 1 and 3
x = layer(x)
for layer in layers: # this might iterate over all layers
x = layer(x)
for layer in layers: # this might not iterate over any layers
x = layer(x)
Args:
p (float): probability of dropping out each layer
modules (iterable, optional): an iterable of modules to add
"""
def __init__(self, p, modules=None):
super().__init__(modules)
self.p = p
def __iter__(self):
dropout_probs = torch.empty(len(self)).uniform_()
for i, m in enumerate(super().__iter__()):
if not self.training or (dropout_probs[i] > self.p):
yield m
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/layer_drop.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Optional, Tuple
import torch
import torch.nn as nn
from fairseq.modules import (
FairseqDropout,
LayerDropModuleList,
LayerNorm,
MultiheadAttention,
PositionalEmbedding,
TransformerSentenceEncoderLayer,
)
from fairseq.modules.quant_noise import quant_noise as apply_quant_noise_
def init_bert_params(module):
"""
Initialize the weights specific to the BERT Model.
This overrides the default initializations depending on the specified arguments.
1. If normal_init_linear_weights is set then weights of linear
layer will be initialized using the normal distribution and
bais will be set to the specified value.
2. If normal_init_embed_weights is set then weights of embedding
layer will be initialized using the normal distribution.
3. If normal_init_proj_weights is set then weights of
in_project_weight for MultiHeadAttention initialized using
the normal distribution (to be validated).
"""
def normal_(data):
# with FSDP, module params will be on CUDA, so we cast them back to CPU
# so that the RNG is consistent with and without FSDP
data.copy_(data.cpu().normal_(mean=0.0, std=0.02).to(data.device))
if isinstance(module, nn.Linear):
normal_(module.weight.data)
if module.bias is not None:
module.bias.data.zero_()
if isinstance(module, nn.Embedding):
normal_(module.weight.data)
if module.padding_idx is not None:
module.weight.data[module.padding_idx].zero_()
if isinstance(module, MultiheadAttention):
normal_(module.q_proj.weight.data)
normal_(module.k_proj.weight.data)
normal_(module.v_proj.weight.data)
class TransformerSentenceEncoder(nn.Module):
"""
Implementation for a Bi-directional Transformer based Sentence Encoder used
in BERT/XLM style pre-trained models.
This first computes the token embedding using the token embedding matrix,
position embeddings (if specified) and segment embeddings
(if specified). After applying the specified number of
TransformerEncoderLayers, it outputs all the internal states of the
encoder as well as the final representation associated with the first
token (usually CLS token).
Input:
- tokens: B x T matrix representing sentences
- segment_labels: B x T matrix representing segment label for tokens
Output:
- a tuple of the following:
- a list of internal model states used to compute the
predictions where each tensor has shape T x B x C
- sentence representation associated with first input token
in format B x C.
"""
def __init__(
self,
padding_idx: int,
vocab_size: int,
num_encoder_layers: int = 6,
embedding_dim: int = 768,
ffn_embedding_dim: int = 3072,
num_attention_heads: int = 8,
dropout: float = 0.1,
attention_dropout: float = 0.1,
activation_dropout: float = 0.1,
layerdrop: float = 0.0,
max_seq_len: int = 256,
num_segments: int = 2,
use_position_embeddings: bool = True,
offset_positions_by_padding: bool = True,
encoder_normalize_before: bool = False,
apply_bert_init: bool = False,
activation_fn: str = "relu",
learned_pos_embedding: bool = True,
embed_scale: float = None,
freeze_embeddings: bool = False,
n_trans_layers_to_freeze: int = 0,
export: bool = False,
traceable: bool = False,
q_noise: float = 0.0,
qn_block_size: int = 8,
) -> None:
super().__init__()
self.padding_idx = padding_idx
self.vocab_size = vocab_size
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.layerdrop = layerdrop
self.max_seq_len = max_seq_len
self.embedding_dim = embedding_dim
self.num_segments = num_segments
self.use_position_embeddings = use_position_embeddings
self.apply_bert_init = apply_bert_init
self.learned_pos_embedding = learned_pos_embedding
self.traceable = traceable
self.embed_tokens = self.build_embedding(
self.vocab_size, self.embedding_dim, self.padding_idx
)
self.embed_scale = embed_scale
if q_noise > 0:
self.quant_noise = apply_quant_noise_(
nn.Linear(self.embedding_dim, self.embedding_dim, bias=False),
q_noise,
qn_block_size,
)
else:
self.quant_noise = None
self.segment_embeddings = (
nn.Embedding(self.num_segments, self.embedding_dim, padding_idx=None)
if self.num_segments > 0
else None
)
self.embed_positions = (
PositionalEmbedding(
self.max_seq_len,
self.embedding_dim,
padding_idx=(self.padding_idx if offset_positions_by_padding else None),
learned=self.learned_pos_embedding,
)
if self.use_position_embeddings
else None
)
if encoder_normalize_before:
self.emb_layer_norm = LayerNorm(self.embedding_dim, export=export)
else:
self.emb_layer_norm = None
if self.layerdrop > 0.0:
self.layers = LayerDropModuleList(p=self.layerdrop)
else:
self.layers = nn.ModuleList([])
self.layers.extend(
[
self.build_transformer_sentence_encoder_layer(
embedding_dim=self.embedding_dim,
ffn_embedding_dim=ffn_embedding_dim,
num_attention_heads=num_attention_heads,
dropout=self.dropout_module.p,
attention_dropout=attention_dropout,
activation_dropout=activation_dropout,
activation_fn=activation_fn,
export=export,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
for _ in range(num_encoder_layers)
]
)
# Apply initialization of model params after building the model
if self.apply_bert_init:
self.apply(init_bert_params)
def freeze_module_params(m):
if m is not None:
for p in m.parameters():
p.requires_grad = False
if freeze_embeddings:
freeze_module_params(self.embed_tokens)
freeze_module_params(self.segment_embeddings)
freeze_module_params(self.embed_positions)
freeze_module_params(self.emb_layer_norm)
for layer in range(n_trans_layers_to_freeze):
freeze_module_params(self.layers[layer])
def build_embedding(self, vocab_size, embedding_dim, padding_idx):
return nn.Embedding(vocab_size, embedding_dim, padding_idx)
def build_transformer_sentence_encoder_layer(
self,
embedding_dim,
ffn_embedding_dim,
num_attention_heads,
dropout,
attention_dropout,
activation_dropout,
activation_fn,
export,
q_noise,
qn_block_size,
):
return TransformerSentenceEncoderLayer(
embedding_dim=embedding_dim,
ffn_embedding_dim=ffn_embedding_dim,
num_attention_heads=num_attention_heads,
dropout=dropout,
attention_dropout=attention_dropout,
activation_dropout=activation_dropout,
activation_fn=activation_fn,
export=export,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
def forward(
self,
tokens: torch.Tensor,
segment_labels: torch.Tensor = None,
last_state_only: bool = False,
positions: Optional[torch.Tensor] = None,
token_embeddings: Optional[torch.Tensor] = None,
attn_mask: Optional[torch.Tensor] = None,
) -> Tuple[torch.Tensor, torch.Tensor]:
is_tpu = tokens.device.type == "xla"
# compute padding mask. This is needed for multi-head attention
padding_mask = tokens.eq(self.padding_idx)
if not self.traceable and not is_tpu and not padding_mask.any():
padding_mask = None
if token_embeddings is not None:
x = token_embeddings
else:
x = self.embed_tokens(tokens)
if self.embed_scale is not None:
x = x * self.embed_scale
if self.embed_positions is not None:
x = x + self.embed_positions(tokens, positions=positions)
if self.segment_embeddings is not None and segment_labels is not None:
x = x + self.segment_embeddings(segment_labels)
if self.quant_noise is not None:
x = self.quant_noise(x)
if self.emb_layer_norm is not None:
x = self.emb_layer_norm(x)
x = self.dropout_module(x)
# account for padding while computing the representation
if padding_mask is not None:
x = x * (1 - padding_mask.unsqueeze(-1).type_as(x))
# B x T x C -> T x B x C
x = x.transpose(0, 1)
inner_states = []
if not last_state_only:
inner_states.append(x)
for layer in self.layers:
x, _ = layer(
x, self_attn_padding_mask=padding_mask, self_attn_mask=attn_mask
)
if not last_state_only:
inner_states.append(x)
sentence_rep = x[0, :, :]
if last_state_only:
inner_states = [x]
if self.traceable:
return torch.stack(inner_states), sentence_rep
else:
return inner_states, sentence_rep
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/transformer_sentence_encoder.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
"""isort:skip_file"""
from .adaptive_input import AdaptiveInput
from .adaptive_softmax import AdaptiveSoftmax
from .base_layer import BaseLayer
from .beamable_mm import BeamableMM
from .character_token_embedder import CharacterTokenEmbedder
from .conv_tbc import ConvTBC
from .cross_entropy import cross_entropy
from .downsampled_multihead_attention import DownsampledMultiHeadAttention
from .dynamic_convolution import DynamicConv, DynamicConv1dTBC
from .dynamic_crf_layer import DynamicCRF
from .fairseq_dropout import FairseqDropout
from .fp32_batch_norm import Fp32BatchNorm
from .fp32_group_norm import Fp32GroupNorm
from .fp32_instance_norm import Fp32InstanceNorm
from .gelu import gelu, gelu_accurate
from .grad_multiply import GradMultiply
from .gumbel_vector_quantizer import GumbelVectorQuantizer
from .kmeans_vector_quantizer import KmeansVectorQuantizer
from .layer_drop import LayerDropModuleList
from .layer_norm import Fp32LayerNorm, LayerNorm
from .learned_positional_embedding import LearnedPositionalEmbedding
from .lightweight_convolution import LightweightConv, LightweightConv1dTBC
from .linearized_convolution import LinearizedConvolution
from .location_attention import LocationAttention
from .lstm_cell_with_zoneout import LSTMCellWithZoneOut
from .multihead_attention import MultiheadAttention
from .positional_embedding import PositionalEmbedding
from .same_pad import SamePad
from .scalar_bias import ScalarBias
from .sinusoidal_positional_embedding import SinusoidalPositionalEmbedding
from .transformer_sentence_encoder_layer import TransformerSentenceEncoderLayer
from .transformer_sentence_encoder import TransformerSentenceEncoder
from .transpose_last import TransposeLast
from .unfold import unfold1d
from .transformer_layer import TransformerDecoderLayer, TransformerEncoderLayer
from .vggblock import VGGBlock
from .espnet_multihead_attention import (
RelPositionMultiHeadedAttention,
RotaryPositionMultiHeadedAttention,
)
from .rotary_positional_embedding import RotaryPositionalEmbedding
from .positional_encoding import (
RelPositionalEncoding,
)
__all__ = [
"AdaptiveInput",
"AdaptiveSoftmax",
"BaseLayer",
"BeamableMM",
"CharacterTokenEmbedder",
"ConvTBC",
"cross_entropy",
"DownsampledMultiHeadAttention",
"DynamicConv1dTBC",
"DynamicConv",
"DynamicCRF",
"FairseqDropout",
"Fp32BatchNorm",
"Fp32GroupNorm",
"Fp32LayerNorm",
"Fp32InstanceNorm",
"gelu",
"gelu_accurate",
"GradMultiply",
"GumbelVectorQuantizer",
"KmeansVectorQuantizer",
"LayerDropModuleList",
"LayerNorm",
"LearnedPositionalEmbedding",
"LightweightConv1dTBC",
"LightweightConv",
"LinearizedConvolution",
"LocationAttention",
"LSTMCellWithZoneOut",
"MultiheadAttention",
"PositionalEmbedding",
"SamePad",
"ScalarBias",
"SinusoidalPositionalEmbedding",
"TransformerSentenceEncoderLayer",
"TransformerSentenceEncoder",
"TransformerDecoderLayer",
"TransformerEncoderLayer",
"TransposeLast",
"VGGBlock",
"unfold1d",
"ESPNETMultiheadedAttention",
"PositionalEmbedding",
"RelPositionMultiHeadedAttention",
"RelPositionalEncoding",
"RotaryPositionalEmbedding",
"RotaryPositionMultiHeadedAttention",
]
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/__init__.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch.nn as nn
from fairseq.modules import TransformerSentenceEncoder
from fairseq.modules.sparse_transformer_sentence_encoder_layer import (
SparseTransformerSentenceEncoderLayer,
)
class SparseTransformerSentenceEncoder(TransformerSentenceEncoder):
"""
Sparse implementation of the TransformerSentenceEncoder
- see SparseMultiheadAttention
"""
def __init__(
self,
padding_idx: int,
vocab_size: int,
num_encoder_layers: int = 6,
embedding_dim: int = 768,
ffn_embedding_dim: int = 3072,
num_attention_heads: int = 8,
dropout: float = 0.1,
attention_dropout: float = 0.1,
activation_dropout: float = 0.1,
max_seq_len: int = 256,
num_segments: int = 2,
use_position_embeddings: bool = True,
offset_positions_by_padding: bool = True,
encoder_normalize_before: bool = False,
apply_bert_init: bool = False,
activation_fn: str = "relu",
learned_pos_embedding: bool = True,
embed_scale: float = None,
freeze_embeddings: bool = False,
n_trans_layers_to_freeze: int = 0,
export: bool = False,
is_bidirectional: bool = True,
stride: int = 32,
expressivity: int = 8,
) -> None:
super().__init__(
padding_idx,
vocab_size,
num_encoder_layers,
embedding_dim,
ffn_embedding_dim,
num_attention_heads,
dropout,
attention_dropout,
activation_dropout,
max_seq_len,
num_segments,
use_position_embeddings,
offset_positions_by_padding,
encoder_normalize_before,
apply_bert_init,
activation_fn,
learned_pos_embedding,
embed_scale,
freeze_embeddings,
n_trans_layers_to_freeze,
export,
)
self.layers = nn.ModuleList(
[
SparseTransformerSentenceEncoderLayer(
embedding_dim=self.embedding_dim,
ffn_embedding_dim=ffn_embedding_dim,
num_attention_heads=num_attention_heads,
dropout=dropout,
attention_dropout=attention_dropout,
activation_dropout=activation_dropout,
activation_fn=activation_fn,
export=export,
is_bidirectional=is_bidirectional,
stride=stride,
expressivity=expressivity,
)
for _ in range(num_encoder_layers)
]
)
def freeze_module_params(m):
if m is not None:
for p in m.parameters():
p.requires_grad = False
for layer in range(n_trans_layers_to_freeze):
freeze_module_params(self.layers[layer])
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/sparse_transformer_sentence_encoder.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
import torch
import torch.nn.functional as F
from fairseq import utils
from fairseq.incremental_decoding_utils import with_incremental_state
from .conv_tbc import ConvTBC
from typing import Dict, Optional
from torch import Tensor
@with_incremental_state
class LinearizedConvolution(ConvTBC):
"""An optimized version of nn.Conv1d.
At training time, this module uses ConvTBC, which is an optimized version
of Conv1d. At inference time, it optimizes incremental generation (i.e.,
one time step at a time) by replacing the convolutions with linear layers.
Note that the input order changes from training to inference.
"""
def __init__(self, in_channels, out_channels, kernel_size, **kwargs):
super().__init__(in_channels, out_channels, kernel_size, **kwargs)
self._linearized_weight = None
self.register_backward_hook(self._clear_linearized_weight)
def state_dict(self, destination=None, prefix="", keep_vars=False):
state = ConvTBC.state_dict(self, destination, prefix, keep_vars=keep_vars)
# don't store redundant _linearized_weight in checkpoints
if prefix + "_linearized_weight" in state:
del state[prefix + "_linearized_weight"]
return state
def upgrade_state_dict_named(self, state_dict, name):
prefix = name + "." if name != "" else ""
if prefix + "_linearized_weight" in state_dict:
del state_dict[prefix + "_linearized_weight"]
@torch.jit.export
def forward(
self,
input,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
):
"""
Args:
incremental_state: Used to buffer signal; if not None, then input is
expected to contain a single frame. If the input order changes
between time steps, call reorder_incremental_state.
Input:
Time x Batch x Channel during training
Batch x Time x Channel during inference
"""
if incremental_state is None:
output = self.conv_tbc(input)
if self.kernel_size[0] > 1 and self.padding[0] > 0:
# remove future timesteps added by padding
output = output[: -self.padding[0], :, :]
return output
# reshape weight
weight = self._get_linearized_weight()
kw = self.kernel_size[0]
bsz = input.size(0) # input: bsz x len x dim
if kw > 1:
input = input.data
input_buffer = self._get_input_buffer(incremental_state)
if input_buffer is None:
input_buffer = input.new(bsz, kw, input.size(2)).zero_()
self._set_input_buffer(incremental_state, input_buffer)
else:
# shift buffer
input_buffer[:, :-1, :] = input_buffer[:, 1:, :].clone()
# append next input
input_buffer[:, -1, :] = input[:, -1, :]
input = input_buffer
with torch.no_grad():
output = F.linear(input.view(bsz, -1), weight, self.bias)
return output.view(bsz, 1, -1)
@torch.jit.unused
def reorder_incremental_state(
self,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]],
new_order,
):
input_buffer = self._get_input_buffer(incremental_state)
if input_buffer is not None:
input_buffer = input_buffer.index_select(0, new_order)
self._set_input_buffer(incremental_state, input_buffer)
@torch.jit.unused
def _get_input_buffer(
self, incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]]
):
return utils.get_incremental_state(self, incremental_state, "input_buffer")
@torch.jit.unused
def _set_input_buffer(
self,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]],
new_buffer,
):
return utils.set_incremental_state(
self, incremental_state, "input_buffer", new_buffer
)
@torch.jit.unused
def _get_linearized_weight(self):
if self._linearized_weight is None:
kw = self.kernel_size[0]
weight = self.weight.transpose(2, 1).transpose(1, 0).contiguous()
assert weight.size() == (self.out_channels, kw, self.in_channels)
return weight.view(self.out_channels, -1)
return self._linearized_weight
@torch.jit.unused
def _clear_linearized_weight(self, *args):
self._linearized_weight = None
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/linearized_convolution.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Dict, List, Optional
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.modules import LayerNorm, MultiheadAttention
from fairseq.modules.fairseq_dropout import FairseqDropout
from fairseq.modules.quant_noise import quant_noise
from torch import Tensor
from fairseq.models.transformer import (
TransformerConfig,
)
class TransformerEncoderLayerBase(nn.Module):
"""Encoder layer block.
In the original paper each operation (multi-head attention or FFN) is
postprocessed with: `dropout -> add residual -> layernorm`. In the
tensor2tensor code they suggest that learning is more robust when
preprocessing each layer with layernorm and postprocessing with:
`dropout -> add residual`. We default to the approach in the paper, but the
tensor2tensor approach can be enabled by setting
*cfg.encoder.normalize_before* to ``True``.
Args:
args (argparse.Namespace): parsed command-line arguments
"""
def __init__(self, cfg):
super().__init__()
self.cfg = cfg
self.embed_dim = cfg.encoder.embed_dim
self.quant_noise = cfg.quant_noise.pq
self.quant_noise_block_size = cfg.quant_noise.pq_block_size
self.self_attn = self.build_self_attention(self.embed_dim, cfg)
self.self_attn_layer_norm = LayerNorm(self.embed_dim, export=cfg.export)
self.dropout_module = FairseqDropout(
cfg.dropout, module_name=self.__class__.__name__
)
self.activation_fn = utils.get_activation_fn(activation=cfg.activation_fn)
activation_dropout_p = cfg.activation_dropout
if activation_dropout_p == 0:
# for backwards compatibility with models that use cfg.relu_dropout
activation_dropout_p = cfg.relu_dropout or 0
self.activation_dropout_module = FairseqDropout(
float(activation_dropout_p), module_name=self.__class__.__name__
)
self.normalize_before = cfg.encoder.normalize_before
self.fc1 = self.build_fc1(
self.embed_dim,
cfg.encoder.ffn_embed_dim,
self.quant_noise,
self.quant_noise_block_size,
)
self.fc2 = self.build_fc2(
cfg.encoder.ffn_embed_dim,
self.embed_dim,
self.quant_noise,
self.quant_noise_block_size,
)
self.final_layer_norm = LayerNorm(self.embed_dim, export=cfg.export)
def build_fc1(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(
nn.Linear(input_dim, output_dim), p=q_noise, block_size=qn_block_size
)
def build_fc2(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(
nn.Linear(input_dim, output_dim), p=q_noise, block_size=qn_block_size
)
def _get_fc_rank(self, remove_num: int) -> List[int]:
f1_filter_param = []
for i in range(self.fc1.out_features):
f1_filter_param.append(
torch.sum(torch.abs(self.fc1.weight[i]))
+ torch.sum(torch.abs(self.fc2.weight[:, i]))
+ torch.abs(self.fc1.bias[i])
)
return sorted(
range(len(f1_filter_param)), key=lambda k: f1_filter_param[k], reverse=False
)[0:remove_num]
def _prune_fc_layer(self, remove_index: List[int]):
new_fc1_weight = []
new_fc1_bias = []
for i in range(self.fc1.out_features):
if i not in remove_index:
new_fc1_weight.append(self.fc1.weight[i])
new_fc1_bias.append(self.fc1.bias[i])
new_fc1_weight = torch.stack(new_fc1_weight).detach()
new_fc1_weight.requires_grad = True
new_fc1_bias = torch.stack(new_fc1_bias).detach()
new_fc1_bias.requires_grad = True
self.fc1 = quant_noise(
nn.Linear(self.fc1.in_features, self.fc1.out_features - len(remove_index)),
p=self.quant_noise,
block_size=self.quant_noise_block_size,
)
self.fc1.weight = torch.nn.Parameter(new_fc1_weight)
self.fc1.bias = torch.nn.Parameter(new_fc1_bias)
new_fc2_weight = []
new_fc2_bias = []
for i in range(self.fc2.in_features):
if i not in remove_index:
new_fc2_weight.append(self.fc2.weight[:, i])
new_fc2_bias = self.fc2.bias.detach()
new_fc2_weight = torch.stack(new_fc2_weight, dim=-1).detach()
new_fc2_weight.requires_grad = True
new_fc2_bias = self.fc2.bias.detach()
new_fc2_bias.requires_grad = True
self.fc2 = quant_noise(
nn.Linear(self.fc2.in_features - len(remove_index), self.fc2.out_features),
p=self.quant_noise,
block_size=self.quant_noise_block_size,
)
self.fc2.weight = torch.nn.Parameter(new_fc2_weight)
self.fc2.bias = torch.nn.Parameter(new_fc2_bias)
def build_self_attention(self, embed_dim, cfg):
return MultiheadAttention(
embed_dim,
cfg.encoder.attention_heads,
dropout=cfg.attention_dropout,
self_attention=True,
q_noise=self.quant_noise,
qn_block_size=self.quant_noise_block_size,
)
def residual_connection(self, x, residual):
return residual + x
def upgrade_state_dict_named(self, state_dict, name):
"""
Rename layer norm states from `...layer_norms.0.weight` to
`...self_attn_layer_norm.weight` and `...layer_norms.1.weight` to
`...final_layer_norm.weight`
"""
layer_norm_map = {"0": "self_attn_layer_norm", "1": "final_layer_norm"}
for old, new in layer_norm_map.items():
for m in ("weight", "bias"):
k = "{}.layer_norms.{}.{}".format(name, old, m)
if k in state_dict:
state_dict["{}.{}.{}".format(name, new, m)] = state_dict[k]
del state_dict[k]
def forward(
self,
x,
encoder_padding_mask: Optional[Tensor],
attn_mask: Optional[Tensor] = None,
):
"""
Args:
x (Tensor): input to the layer of shape `(seq_len, batch, embed_dim)`
encoder_padding_mask (ByteTensor): binary ByteTensor of shape
`(batch, seq_len)` where padding elements are indicated by ``1``.
attn_mask (ByteTensor): binary tensor of shape `(tgt_len, src_len)`,
where `tgt_len` is the length of output and `src_len` is the
length of input, though here both are equal to `seq_len`.
`attn_mask[tgt_i, src_j] = 1` means that when calculating the
embedding for `tgt_i`, we exclude (mask out) `src_j`. This is
useful for strided self-attention.
Returns:
encoded output of shape `(seq_len, batch, embed_dim)`
"""
# anything in original attn_mask = 1, becomes -1e8
# anything in original attn_mask = 0, becomes 0
# Note that we cannot use -inf here, because at some edge cases,
# the attention weight (before softmax) for some padded element in query
# will become -inf, which results in NaN in model parameters
if attn_mask is not None:
attn_mask = attn_mask.masked_fill(
attn_mask.to(torch.bool), -1e8 if x.dtype == torch.float32 else -1e4
)
residual = x
if self.normalize_before:
x = self.self_attn_layer_norm(x)
x, _ = self.self_attn(
query=x,
key=x,
value=x,
key_padding_mask=encoder_padding_mask,
need_weights=False,
attn_mask=attn_mask,
)
x = self.dropout_module(x)
x = self.residual_connection(x, residual)
if not self.normalize_before:
x = self.self_attn_layer_norm(x)
residual = x
if self.normalize_before:
x = self.final_layer_norm(x)
x = self.activation_fn(self.fc1(x))
x = self.activation_dropout_module(x)
x = self.fc2(x)
x = self.dropout_module(x)
x = self.residual_connection(x, residual)
if not self.normalize_before:
x = self.final_layer_norm(x)
return x
# backward compatible with the legacy argparse format
class TransformerEncoderLayer(TransformerEncoderLayerBase):
def __init__(self, args):
super().__init__(TransformerConfig.from_namespace(args))
self.args = args
def build_self_attention(self, embed_dim, args):
return super().build_self_attention(
embed_dim, TransformerConfig.from_namespace(args)
)
class TransformerDecoderLayerBase(nn.Module):
"""Decoder layer block.
In the original paper each operation (multi-head attention, encoder
attention or FFN) is postprocessed with: `dropout -> add residual ->
layernorm`. In the tensor2tensor code they suggest that learning is more
robust when preprocessing each layer with layernorm and postprocessing with:
`dropout -> add residual`. We default to the approach in the paper, but the
tensor2tensor approach can be enabled by setting
*cfg.decoder.normalize_before* to ``True``.
Args:
args (argparse.Namespace): parsed command-line arguments
no_encoder_attn (bool, optional): whether to attend to encoder outputs
(default: False).
"""
def __init__(
self, cfg, no_encoder_attn=False, add_bias_kv=False, add_zero_attn=False
):
super().__init__()
self.embed_dim = cfg.decoder.embed_dim
self.dropout_module = FairseqDropout(
cfg.dropout, module_name=self.__class__.__name__
)
self.quant_noise = cfg.quant_noise.pq
self.quant_noise_block_size = cfg.quant_noise.pq_block_size
self.cross_self_attention = cfg.cross_self_attention
self.self_attn = self.build_self_attention(
self.embed_dim,
cfg,
add_bias_kv=add_bias_kv,
add_zero_attn=add_zero_attn,
)
self.attn_ln = (
LayerNorm(self.embed_dim)
if utils.safe_getattr(cfg, "scale_attn", False)
else None
)
self.nh = self.self_attn.num_heads
self.head_dim = self.self_attn.head_dim
scale_heads = utils.safe_getattr(cfg, "scale_heads", False)
self.c_attn = (
nn.Parameter(torch.ones((self.nh,)), requires_grad=True)
if scale_heads
else None
)
self.activation_fn = utils.get_activation_fn(activation=cfg.activation_fn)
activation_dropout_p = cfg.activation_dropout
if activation_dropout_p == 0:
# for backwards compatibility with models that use cfg.relu_dropout
activation_dropout_p = cfg.relu_dropout or 0
self.activation_dropout_module = FairseqDropout(
float(activation_dropout_p), module_name=self.__class__.__name__
)
self.normalize_before = cfg.decoder.normalize_before
self.self_attn_layer_norm = LayerNorm(self.embed_dim, export=cfg.export)
if no_encoder_attn:
self.encoder_attn = None
self.encoder_attn_layer_norm = None
else:
self.encoder_attn = self.build_encoder_attention(self.embed_dim, cfg)
self.encoder_attn_layer_norm = LayerNorm(self.embed_dim, export=cfg.export)
self.ffn_layernorm = (
LayerNorm(cfg.decoder.ffn_embed_dim)
if utils.safe_getattr(cfg, "deepnet", False)
else None
)
self.w_resid = (
nn.Parameter(
torch.ones(
self.embed_dim,
),
requires_grad=True,
)
if utils.safe_getattr(cfg, "scale_resids", False)
else None
)
self.fc1 = self.build_fc1(
self.embed_dim,
cfg.decoder.ffn_embed_dim,
self.quant_noise,
self.quant_noise_block_size,
)
self.fc2 = self.build_fc2(
cfg.decoder.ffn_embed_dim,
self.embed_dim,
self.quant_noise,
self.quant_noise_block_size,
)
self.final_layer_norm = LayerNorm(self.embed_dim, export=cfg.export)
self.need_attn = True
self.onnx_trace = False
def build_fc1(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(nn.Linear(input_dim, output_dim), q_noise, qn_block_size)
def build_fc2(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(nn.Linear(input_dim, output_dim), q_noise, qn_block_size)
def build_self_attention(
self, embed_dim, cfg, add_bias_kv=False, add_zero_attn=False
):
return MultiheadAttention(
embed_dim,
cfg.decoder.attention_heads,
dropout=cfg.attention_dropout,
add_bias_kv=add_bias_kv,
add_zero_attn=add_zero_attn,
self_attention=not cfg.cross_self_attention,
q_noise=self.quant_noise,
qn_block_size=self.quant_noise_block_size,
attention_norm=True if utils.safe_getattr(cfg, "deepnet", False) else False,
)
def build_encoder_attention(self, embed_dim, cfg):
return MultiheadAttention(
embed_dim,
cfg.decoder.attention_heads,
kdim=cfg.encoder.embed_dim,
vdim=cfg.encoder.embed_dim,
dropout=cfg.attention_dropout,
encoder_decoder_attention=True,
q_noise=self.quant_noise,
qn_block_size=self.quant_noise_block_size,
)
def prepare_for_onnx_export_(self):
self.onnx_trace = True
def residual_connection(self, x, residual):
return residual + x
def forward(
self,
x,
encoder_out: Optional[torch.Tensor] = None,
encoder_padding_mask: Optional[torch.Tensor] = None,
incremental_state: Optional[Dict[str, Dict[str, Optional[Tensor]]]] = None,
prev_self_attn_state: Optional[List[torch.Tensor]] = None,
prev_attn_state: Optional[List[torch.Tensor]] = None,
self_attn_mask: Optional[torch.Tensor] = None,
self_attn_padding_mask: Optional[torch.Tensor] = None,
need_attn: bool = False,
need_head_weights: bool = False,
):
"""
Args:
x (Tensor): input to the layer of shape `(seq_len, batch, embed_dim)`
encoder_padding_mask (ByteTensor, optional): binary
ByteTensor of shape `(batch, src_len)` where padding
elements are indicated by ``1``.
need_attn (bool, optional): return attention weights
need_head_weights (bool, optional): return attention weights
for each head (default: return average over heads).
Returns:
encoded output of shape `(seq_len, batch, embed_dim)`
"""
if need_head_weights:
need_attn = True
residual = x
if self.normalize_before:
x = self.self_attn_layer_norm(x)
if prev_self_attn_state is not None:
prev_key, prev_value = prev_self_attn_state[:2]
saved_state: Dict[str, Optional[Tensor]] = {
"prev_key": prev_key,
"prev_value": prev_value,
}
if len(prev_self_attn_state) >= 3:
saved_state["prev_key_padding_mask"] = prev_self_attn_state[2]
assert incremental_state is not None
self.self_attn._set_input_buffer(incremental_state, saved_state)
_self_attn_input_buffer = self.self_attn._get_input_buffer(incremental_state)
if self.cross_self_attention and not (
incremental_state is not None
and _self_attn_input_buffer is not None
and "prev_key" in _self_attn_input_buffer
):
if self_attn_mask is not None:
assert encoder_out is not None
self_attn_mask = torch.cat(
(x.new_zeros(x.size(0), encoder_out.size(0)), self_attn_mask), dim=1
)
if self_attn_padding_mask is not None:
if encoder_padding_mask is None:
assert encoder_out is not None
encoder_padding_mask = self_attn_padding_mask.new_zeros(
encoder_out.size(1), encoder_out.size(0)
)
self_attn_padding_mask = torch.cat(
(encoder_padding_mask, self_attn_padding_mask), dim=1
)
assert encoder_out is not None
y = torch.cat((encoder_out, x), dim=0)
else:
y = x
x, attn = self.self_attn(
query=x,
key=y,
value=y,
key_padding_mask=self_attn_padding_mask,
incremental_state=incremental_state,
need_weights=False,
attn_mask=self_attn_mask,
)
if self.c_attn is not None:
tgt_len, bsz = x.size(0), x.size(1)
x = x.view(tgt_len, bsz, self.nh, self.head_dim)
x = torch.einsum("tbhd,h->tbhd", x, self.c_attn)
x = x.reshape(tgt_len, bsz, self.embed_dim)
if self.attn_ln is not None:
x = self.attn_ln(x)
x = self.dropout_module(x)
x = self.residual_connection(x, residual)
if not self.normalize_before:
x = self.self_attn_layer_norm(x)
if self.encoder_attn is not None and encoder_out is not None:
residual = x
if self.normalize_before:
x = self.encoder_attn_layer_norm(x)
if prev_attn_state is not None:
prev_key, prev_value = prev_attn_state[:2]
saved_state: Dict[str, Optional[Tensor]] = {
"prev_key": prev_key,
"prev_value": prev_value,
}
if len(prev_attn_state) >= 3:
saved_state["prev_key_padding_mask"] = prev_attn_state[2]
assert incremental_state is not None
self.encoder_attn._set_input_buffer(incremental_state, saved_state)
x, attn = self.encoder_attn(
query=x,
key=encoder_out,
value=encoder_out,
key_padding_mask=encoder_padding_mask,
incremental_state=incremental_state,
static_kv=True,
need_weights=need_attn or (not self.training and self.need_attn),
need_head_weights=need_head_weights,
)
x = self.dropout_module(x)
x = self.residual_connection(x, residual)
if not self.normalize_before:
x = self.encoder_attn_layer_norm(x)
residual = x
if self.normalize_before:
x = self.final_layer_norm(x)
x = self.activation_fn(self.fc1(x))
x = self.activation_dropout_module(x)
if self.ffn_layernorm is not None:
x = self.ffn_layernorm(x)
x = self.fc2(x)
x = self.dropout_module(x)
if self.w_resid is not None:
residual = torch.mul(self.w_resid, residual)
x = self.residual_connection(x, residual)
if not self.normalize_before:
x = self.final_layer_norm(x)
if self.onnx_trace and incremental_state is not None:
saved_state = self.self_attn._get_input_buffer(incremental_state)
assert saved_state is not None
if self_attn_padding_mask is not None:
self_attn_state = [
saved_state["prev_key"],
saved_state["prev_value"],
saved_state["prev_key_padding_mask"],
]
else:
self_attn_state = [saved_state["prev_key"], saved_state["prev_value"]]
return x, attn, self_attn_state
return x, attn, None
def make_generation_fast_(self, need_attn: bool = False, **kwargs):
self.need_attn = need_attn
# backward compatible with the legacy argparse format
class TransformerDecoderLayer(TransformerDecoderLayerBase):
def __init__(
self, args, no_encoder_attn=False, add_bias_kv=False, add_zero_attn=False
):
super().__init__(
TransformerConfig.from_namespace(args),
no_encoder_attn=no_encoder_attn,
add_bias_kv=add_bias_kv,
add_zero_attn=add_zero_attn,
)
self.args = args
def build_self_attention(
self, embed_dim, args, add_bias_kv=False, add_zero_attn=False
):
return super().build_self_attention(
embed_dim,
TransformerConfig.from_namespace(args),
add_bias_kv=add_bias_kv,
add_zero_attn=add_zero_attn,
)
def build_encoder_attention(self, embed_dim, args):
return super().build_encoder_attention(
embed_dim,
TransformerConfig.from_namespace(args),
)
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/transformer_layer.py
|
# Copyright (c) Facebook, Inc. and its affiliates.
#
# This source code is licensed under the MIT license found in the
# LICENSE file in the root directory of this source tree.
from typing import Callable, Optional
import torch
import torch.nn as nn
from fairseq import utils
from fairseq.modules import LayerNorm, MultiheadAttention
from fairseq.modules.fairseq_dropout import FairseqDropout
from fairseq.modules.quant_noise import quant_noise
class TransformerSentenceEncoderLayer(nn.Module):
"""
Implements a Transformer Encoder Layer used in BERT/XLM style pre-trained
models.
"""
def __init__(
self,
embedding_dim: int = 768,
ffn_embedding_dim: int = 3072,
num_attention_heads: int = 8,
dropout: float = 0.1,
attention_dropout: float = 0.1,
activation_dropout: float = 0.1,
activation_fn: str = "relu",
export: bool = False,
q_noise: float = 0.0,
qn_block_size: int = 8,
init_fn: Callable = None,
) -> None:
super().__init__()
if init_fn is not None:
init_fn()
# Initialize parameters
self.embedding_dim = embedding_dim
self.num_attention_heads = num_attention_heads
self.attention_dropout = attention_dropout
self.q_noise = q_noise
self.qn_block_size = qn_block_size
self.dropout_module = FairseqDropout(
dropout, module_name=self.__class__.__name__
)
self.activation_dropout_module = FairseqDropout(
activation_dropout, module_name=self.__class__.__name__
)
# Initialize blocks
self.activation_fn = utils.get_activation_fn(activation_fn)
self.self_attn = self.build_self_attention(
self.embedding_dim,
num_attention_heads,
dropout=attention_dropout,
self_attention=True,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
# layer norm associated with the self attention layer
self.self_attn_layer_norm = LayerNorm(self.embedding_dim, export=export)
self.fc1 = self.build_fc1(
self.embedding_dim,
ffn_embedding_dim,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
self.fc2 = self.build_fc2(
ffn_embedding_dim,
self.embedding_dim,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
# layer norm associated with the position wise feed-forward NN
self.final_layer_norm = LayerNorm(self.embedding_dim, export=export)
def build_fc1(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(nn.Linear(input_dim, output_dim), q_noise, qn_block_size)
def build_fc2(self, input_dim, output_dim, q_noise, qn_block_size):
return quant_noise(nn.Linear(input_dim, output_dim), q_noise, qn_block_size)
def build_self_attention(
self,
embed_dim,
num_attention_heads,
dropout,
self_attention,
q_noise,
qn_block_size,
):
return MultiheadAttention(
embed_dim,
num_attention_heads,
dropout=dropout,
self_attention=True,
q_noise=q_noise,
qn_block_size=qn_block_size,
)
def forward(
self,
x: torch.Tensor,
self_attn_mask: Optional[torch.Tensor] = None,
self_attn_padding_mask: Optional[torch.Tensor] = None,
):
"""
LayerNorm is applied either before or after the self-attention/ffn
modules similar to the original Transformer implementation.
"""
residual = x
x, attn = self.self_attn(
query=x,
key=x,
value=x,
key_padding_mask=self_attn_padding_mask,
need_weights=False,
attn_mask=self_attn_mask,
)
x = self.dropout_module(x)
x = residual + x
x = self.self_attn_layer_norm(x)
residual = x
x = self.activation_fn(self.fc1(x))
x = self.activation_dropout_module(x)
x = self.fc2(x)
x = self.dropout_module(x)
x = residual + x
x = self.final_layer_norm(x)
return x, attn
|
KosmosX-API-main
|
kosmosX/fairseq/fairseq/modules/transformer_sentence_encoder_layer.py
|
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