Upload edit\Qwen3-TTS-test\.venv\Lib\site-packages\transformers\models\hubert\modeling_tf_hubert.py with huggingface_hub
Browse files
edit//Qwen3-TTS-test//.venv//Lib//site-packages//transformers//models//hubert//modeling_tf_hubert.py
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|
| 1 |
+
# coding=utf-8
|
| 2 |
+
# Copyright 2021 The Fairseq Authors and the HuggingFace Inc. team. All rights reserved.
|
| 3 |
+
#
|
| 4 |
+
# Licensed under the Apache License, Version 2.0 (the "License");
|
| 5 |
+
# you may not use this file except in compliance with the License.
|
| 6 |
+
# You may obtain a copy of the License at
|
| 7 |
+
#
|
| 8 |
+
# http://www.apache.org/licenses/LICENSE-2.0
|
| 9 |
+
#
|
| 10 |
+
# Unless required by applicable law or agreed to in writing, software
|
| 11 |
+
# distributed under the License is distributed on an "AS IS" BASIS,
|
| 12 |
+
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
| 13 |
+
# See the License for the specific language governing permissions and
|
| 14 |
+
# limitations under the License.
|
| 15 |
+
"""TensorFlow Hubert model."""
|
| 16 |
+
|
| 17 |
+
from __future__ import annotations
|
| 18 |
+
|
| 19 |
+
import warnings
|
| 20 |
+
from typing import Any
|
| 21 |
+
|
| 22 |
+
import numpy as np
|
| 23 |
+
import tensorflow as tf
|
| 24 |
+
|
| 25 |
+
from ...activations_tf import get_tf_activation
|
| 26 |
+
from ...modeling_tf_outputs import TFBaseModelOutput, TFCausalLMOutput
|
| 27 |
+
from ...modeling_tf_utils import (
|
| 28 |
+
TFPreTrainedModel,
|
| 29 |
+
get_initializer,
|
| 30 |
+
keras,
|
| 31 |
+
keras_serializable,
|
| 32 |
+
unpack_inputs,
|
| 33 |
+
)
|
| 34 |
+
from ...tf_utils import shape_list, stable_softmax
|
| 35 |
+
from ...utils import (
|
| 36 |
+
add_start_docstrings,
|
| 37 |
+
add_start_docstrings_to_model_forward,
|
| 38 |
+
logging,
|
| 39 |
+
replace_return_docstrings,
|
| 40 |
+
)
|
| 41 |
+
from .configuration_hubert import HubertConfig
|
| 42 |
+
|
| 43 |
+
|
| 44 |
+
logger = logging.get_logger(__name__)
|
| 45 |
+
|
| 46 |
+
_CONFIG_FOR_DOC = "HubertConfig"
|
| 47 |
+
|
| 48 |
+
|
| 49 |
+
LARGE_NEGATIVE = -1e8
|
| 50 |
+
|
| 51 |
+
|
| 52 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2._sample_without_replacement
|
| 53 |
+
def _sample_without_replacement(distribution, num_samples):
|
| 54 |
+
"""
|
| 55 |
+
Categorical sampling without replacement is currently not implemented. The gumbel-max trick will do for now - see
|
| 56 |
+
https://github.com/tensorflow/tensorflow/issues/9260 for more info
|
| 57 |
+
"""
|
| 58 |
+
z = -tf.math.log(tf.random.uniform(shape_list(distribution), 0, 1))
|
| 59 |
+
_, indices = tf.nn.top_k(distribution + z, num_samples)
|
| 60 |
+
return indices
|
| 61 |
+
|
| 62 |
+
|
| 63 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2._scatter_values_on_batch_indices
|
| 64 |
+
def _scatter_values_on_batch_indices(values, batch_indices, output_shape):
|
| 65 |
+
"""
|
| 66 |
+
Scatter function as in PyTorch with indices in format (batch_dim, indices)
|
| 67 |
+
"""
|
| 68 |
+
indices_shape = shape_list(batch_indices)
|
| 69 |
+
# broadcast batch dim to indices_shape
|
| 70 |
+
broad_casted_batch_dims = tf.reshape(
|
| 71 |
+
tf.broadcast_to(tf.expand_dims(tf.range(indices_shape[0]), axis=-1), indices_shape), [1, -1]
|
| 72 |
+
)
|
| 73 |
+
# transform batch_indices to pair_indices
|
| 74 |
+
pair_indices = tf.transpose(tf.concat([broad_casted_batch_dims, tf.reshape(batch_indices, [1, -1])], 0))
|
| 75 |
+
# scatter values to pair indices
|
| 76 |
+
return tf.scatter_nd(pair_indices, tf.reshape(values, [-1]), output_shape)
|
| 77 |
+
|
| 78 |
+
|
| 79 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2._compute_mask_indices
|
| 80 |
+
def _compute_mask_indices(
|
| 81 |
+
shape: tuple[int, int],
|
| 82 |
+
mask_prob: float,
|
| 83 |
+
mask_length: int,
|
| 84 |
+
min_masks: int = 0,
|
| 85 |
+
) -> tf.Tensor:
|
| 86 |
+
"""
|
| 87 |
+
Computes random mask spans for a given shape
|
| 88 |
+
|
| 89 |
+
Args:
|
| 90 |
+
shape: the shape for which to compute masks.
|
| 91 |
+
should be of size 2 where first element is batch size and 2nd is timesteps
|
| 92 |
+
attention_mask: optional padding mask of the same size as shape, which will prevent masking padded elements
|
| 93 |
+
mask_prob:
|
| 94 |
+
probability for each token to be chosen as start of the span to be masked. this will be multiplied by
|
| 95 |
+
number of timesteps divided by length of mask span to mask approximately this percentage of all elements.
|
| 96 |
+
however due to overlaps, the actual number will be smaller (unless no_overlap is True)
|
| 97 |
+
mask_length: size of the mask
|
| 98 |
+
min_masks: minimum number of masked spans
|
| 99 |
+
|
| 100 |
+
Adapted from [fairseq's
|
| 101 |
+
data_utils.py](https://github.com/pytorch/fairseq/blob/e0788f7007a8473a76db573985031f3c94201e79/fairseq/data/data_utils.py#L376).
|
| 102 |
+
"""
|
| 103 |
+
batch_size, sequence_length = shape
|
| 104 |
+
|
| 105 |
+
if mask_length < 1:
|
| 106 |
+
raise ValueError("`mask_length` has to be bigger than 0.")
|
| 107 |
+
|
| 108 |
+
tf.debugging.assert_less(
|
| 109 |
+
mask_length,
|
| 110 |
+
sequence_length,
|
| 111 |
+
message=(
|
| 112 |
+
f"`mask_length` has to be smaller than `sequence_length`, but got `mask_length`: {mask_length} and"
|
| 113 |
+
f" `sequence_length`: {sequence_length}`"
|
| 114 |
+
),
|
| 115 |
+
)
|
| 116 |
+
|
| 117 |
+
# compute number of masked spans in batch
|
| 118 |
+
num_masked_spans = mask_prob * tf.cast(sequence_length, tf.float32) / mask_length + tf.random.uniform((1,))
|
| 119 |
+
num_masked_spans = tf.maximum(num_masked_spans, min_masks)
|
| 120 |
+
num_masked_spans = tf.cast(num_masked_spans, tf.int32)
|
| 121 |
+
|
| 122 |
+
# make sure num masked indices <= sequence_length
|
| 123 |
+
num_masked_spans = tf.math.minimum(sequence_length // mask_length, num_masked_spans)
|
| 124 |
+
num_masked_spans = tf.squeeze(num_masked_spans)
|
| 125 |
+
|
| 126 |
+
# SpecAugment mask to fill
|
| 127 |
+
spec_aug_mask = tf.zeros((batch_size, sequence_length), dtype=tf.int32)
|
| 128 |
+
|
| 129 |
+
# uniform distribution to sample from, make sure that offset samples are < sequence_length
|
| 130 |
+
uniform_dist = tf.ones((batch_size, sequence_length - (mask_length - 1)))
|
| 131 |
+
|
| 132 |
+
# get random indices to mask
|
| 133 |
+
spec_aug_mask_idxs = _sample_without_replacement(uniform_dist, num_masked_spans)
|
| 134 |
+
|
| 135 |
+
# expand masked indices to masked spans
|
| 136 |
+
spec_aug_mask_idxs = tf.expand_dims(spec_aug_mask_idxs, -1)
|
| 137 |
+
spec_aug_mask_idxs = tf.tile(spec_aug_mask_idxs, (1, 1, mask_length))
|
| 138 |
+
spec_aug_mask_idxs = tf.reshape(spec_aug_mask_idxs, (batch_size, num_masked_spans * mask_length))
|
| 139 |
+
|
| 140 |
+
offsets = tf.range(mask_length)[tf.newaxis, tf.newaxis, :]
|
| 141 |
+
offsets = tf.tile(offsets, (batch_size, num_masked_spans, 1))
|
| 142 |
+
offsets = tf.reshape(offsets, (batch_size, num_masked_spans * mask_length))
|
| 143 |
+
|
| 144 |
+
spec_aug_mask_idxs = spec_aug_mask_idxs + offsets
|
| 145 |
+
|
| 146 |
+
# scatter indices to mask
|
| 147 |
+
spec_aug_mask = _scatter_values_on_batch_indices(
|
| 148 |
+
tf.ones_like(spec_aug_mask_idxs), spec_aug_mask_idxs, tf.shape(spec_aug_mask)
|
| 149 |
+
)
|
| 150 |
+
|
| 151 |
+
return spec_aug_mask
|
| 152 |
+
|
| 153 |
+
|
| 154 |
+
# Copied from transformers.models.bart.modeling_tf_bart._expand_mask
|
| 155 |
+
def _expand_mask(mask: tf.Tensor, tgt_len: int | None = None):
|
| 156 |
+
"""
|
| 157 |
+
Expands attention_mask from `[bsz, seq_len]` to `[bsz, 1, tgt_seq_len, src_seq_len]`.
|
| 158 |
+
"""
|
| 159 |
+
src_len = shape_list(mask)[1]
|
| 160 |
+
tgt_len = tgt_len if tgt_len is not None else src_len
|
| 161 |
+
one_cst = tf.constant(1.0)
|
| 162 |
+
mask = tf.cast(mask, dtype=one_cst.dtype)
|
| 163 |
+
expanded_mask = tf.tile(mask[:, None, None, :], (1, 1, tgt_len, 1))
|
| 164 |
+
|
| 165 |
+
return (one_cst - expanded_mask) * LARGE_NEGATIVE
|
| 166 |
+
|
| 167 |
+
|
| 168 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2GroupNorm with Wav2Vec2->Hubert
|
| 169 |
+
class TFHubertGroupNorm(keras.layers.Layer):
|
| 170 |
+
"""
|
| 171 |
+
From tensorflow-addons https://www.tensorflow.org/addons/api_docs/python/tfa/layers/GroupNormalization
|
| 172 |
+
"""
|
| 173 |
+
|
| 174 |
+
def __init__(
|
| 175 |
+
self,
|
| 176 |
+
groups: int = 32,
|
| 177 |
+
axis: int = -1,
|
| 178 |
+
epsilon: float = 1e-3,
|
| 179 |
+
center: bool = True,
|
| 180 |
+
scale: bool = True,
|
| 181 |
+
beta_initializer: keras.initializers.Initializer = "zeros",
|
| 182 |
+
gamma_initializer: keras.initializers.Initializer = "ones",
|
| 183 |
+
beta_regularizer: keras.regularizers.Regularizer = None,
|
| 184 |
+
gamma_regularizer: keras.regularizers.Regularizer = None,
|
| 185 |
+
beta_constraint: keras.constraints.Constraint = None,
|
| 186 |
+
gamma_constraint: keras.constraints.Constraint = None,
|
| 187 |
+
**kwargs,
|
| 188 |
+
):
|
| 189 |
+
super().__init__(**kwargs)
|
| 190 |
+
self.supports_masking = True
|
| 191 |
+
self.groups = groups
|
| 192 |
+
self.axis = axis
|
| 193 |
+
self.epsilon = epsilon
|
| 194 |
+
self.center = center
|
| 195 |
+
self.scale = scale
|
| 196 |
+
self.beta_initializer = keras.initializers.get(beta_initializer)
|
| 197 |
+
self.gamma_initializer = keras.initializers.get(gamma_initializer)
|
| 198 |
+
self.beta_regularizer = keras.regularizers.get(beta_regularizer)
|
| 199 |
+
self.gamma_regularizer = keras.regularizers.get(gamma_regularizer)
|
| 200 |
+
self.beta_constraint = keras.constraints.get(beta_constraint)
|
| 201 |
+
self.gamma_constraint = keras.constraints.get(gamma_constraint)
|
| 202 |
+
self._check_axis()
|
| 203 |
+
|
| 204 |
+
def build(self, input_shape):
|
| 205 |
+
self._check_if_input_shape_is_none(input_shape)
|
| 206 |
+
self._set_number_of_groups_for_instance_norm(input_shape)
|
| 207 |
+
self._check_size_of_dimensions(input_shape)
|
| 208 |
+
self._create_input_spec(input_shape)
|
| 209 |
+
|
| 210 |
+
self._add_gamma_weight(input_shape)
|
| 211 |
+
self._add_beta_weight(input_shape)
|
| 212 |
+
self.built = True
|
| 213 |
+
super().build(input_shape)
|
| 214 |
+
|
| 215 |
+
def call(self, inputs):
|
| 216 |
+
input_shape = keras.backend.int_shape(inputs)
|
| 217 |
+
tensor_input_shape = tf.shape(inputs)
|
| 218 |
+
|
| 219 |
+
reshaped_inputs, group_shape = self._reshape_into_groups(inputs, input_shape, tensor_input_shape)
|
| 220 |
+
|
| 221 |
+
normalized_inputs = self._apply_normalization(reshaped_inputs, input_shape)
|
| 222 |
+
|
| 223 |
+
is_instance_norm = (input_shape[self.axis] // self.groups) == 1
|
| 224 |
+
if not is_instance_norm:
|
| 225 |
+
outputs = tf.reshape(normalized_inputs, tensor_input_shape)
|
| 226 |
+
else:
|
| 227 |
+
outputs = normalized_inputs
|
| 228 |
+
|
| 229 |
+
return outputs
|
| 230 |
+
|
| 231 |
+
def get_config(self):
|
| 232 |
+
config = {
|
| 233 |
+
"groups": self.groups,
|
| 234 |
+
"axis": self.axis,
|
| 235 |
+
"epsilon": self.epsilon,
|
| 236 |
+
"center": self.center,
|
| 237 |
+
"scale": self.scale,
|
| 238 |
+
"beta_initializer": keras.initializers.serialize(self.beta_initializer),
|
| 239 |
+
"gamma_initializer": keras.initializers.serialize(self.gamma_initializer),
|
| 240 |
+
"beta_regularizer": keras.regularizers.serialize(self.beta_regularizer),
|
| 241 |
+
"gamma_regularizer": keras.regularizers.serialize(self.gamma_regularizer),
|
| 242 |
+
"beta_constraint": keras.constraints.serialize(self.beta_constraint),
|
| 243 |
+
"gamma_constraint": keras.constraints.serialize(self.gamma_constraint),
|
| 244 |
+
}
|
| 245 |
+
base_config = super().get_config()
|
| 246 |
+
return {**base_config, **config}
|
| 247 |
+
|
| 248 |
+
def compute_output_shape(self, input_shape):
|
| 249 |
+
return input_shape
|
| 250 |
+
|
| 251 |
+
def _reshape_into_groups(self, inputs, input_shape, tensor_input_shape):
|
| 252 |
+
group_shape = [tensor_input_shape[i] for i in range(len(input_shape))]
|
| 253 |
+
is_instance_norm = (input_shape[self.axis] // self.groups) == 1
|
| 254 |
+
if not is_instance_norm:
|
| 255 |
+
group_shape[self.axis] = input_shape[self.axis] // self.groups
|
| 256 |
+
group_shape.insert(self.axis, self.groups)
|
| 257 |
+
group_shape = tf.stack(group_shape)
|
| 258 |
+
reshaped_inputs = tf.reshape(inputs, group_shape)
|
| 259 |
+
return reshaped_inputs, group_shape
|
| 260 |
+
else:
|
| 261 |
+
return inputs, group_shape
|
| 262 |
+
|
| 263 |
+
def _apply_normalization(self, reshaped_inputs, input_shape):
|
| 264 |
+
group_shape = keras.backend.int_shape(reshaped_inputs)
|
| 265 |
+
group_reduction_axes = list(range(1, len(group_shape)))
|
| 266 |
+
is_instance_norm = (input_shape[self.axis] // self.groups) == 1
|
| 267 |
+
if not is_instance_norm:
|
| 268 |
+
axis = -2 if self.axis == -1 else self.axis - 1
|
| 269 |
+
else:
|
| 270 |
+
axis = -1 if self.axis == -1 else self.axis - 1
|
| 271 |
+
group_reduction_axes.pop(axis)
|
| 272 |
+
|
| 273 |
+
mean, variance = tf.nn.moments(reshaped_inputs, group_reduction_axes, keepdims=True)
|
| 274 |
+
|
| 275 |
+
gamma, beta = self._get_reshaped_weights(input_shape)
|
| 276 |
+
normalized_inputs = tf.nn.batch_normalization(
|
| 277 |
+
reshaped_inputs,
|
| 278 |
+
mean=mean,
|
| 279 |
+
variance=variance,
|
| 280 |
+
scale=gamma,
|
| 281 |
+
offset=beta,
|
| 282 |
+
variance_epsilon=self.epsilon,
|
| 283 |
+
)
|
| 284 |
+
return normalized_inputs
|
| 285 |
+
|
| 286 |
+
def _get_reshaped_weights(self, input_shape):
|
| 287 |
+
broadcast_shape = self._create_broadcast_shape(input_shape)
|
| 288 |
+
gamma = None
|
| 289 |
+
beta = None
|
| 290 |
+
if self.scale:
|
| 291 |
+
gamma = tf.reshape(self.gamma, broadcast_shape)
|
| 292 |
+
|
| 293 |
+
if self.center:
|
| 294 |
+
beta = tf.reshape(self.beta, broadcast_shape)
|
| 295 |
+
return gamma, beta
|
| 296 |
+
|
| 297 |
+
def _check_if_input_shape_is_none(self, input_shape):
|
| 298 |
+
dim = input_shape[self.axis]
|
| 299 |
+
if dim is None:
|
| 300 |
+
raise ValueError(
|
| 301 |
+
"Axis "
|
| 302 |
+
+ str(self.axis)
|
| 303 |
+
+ " of input tensor should have a defined dimension but the layer received an input with shape "
|
| 304 |
+
+ str(input_shape)
|
| 305 |
+
+ "."
|
| 306 |
+
)
|
| 307 |
+
|
| 308 |
+
def _set_number_of_groups_for_instance_norm(self, input_shape):
|
| 309 |
+
dim = input_shape[self.axis]
|
| 310 |
+
|
| 311 |
+
if self.groups == -1:
|
| 312 |
+
self.groups = dim
|
| 313 |
+
|
| 314 |
+
def _check_size_of_dimensions(self, input_shape):
|
| 315 |
+
dim = input_shape[self.axis]
|
| 316 |
+
if dim < self.groups:
|
| 317 |
+
raise ValueError(
|
| 318 |
+
"Number of groups ("
|
| 319 |
+
+ str(self.groups)
|
| 320 |
+
+ ") cannot be more than the number of channels ("
|
| 321 |
+
+ str(dim)
|
| 322 |
+
+ ")."
|
| 323 |
+
)
|
| 324 |
+
|
| 325 |
+
if dim % self.groups != 0:
|
| 326 |
+
raise ValueError(
|
| 327 |
+
"Number of groups ("
|
| 328 |
+
+ str(self.groups)
|
| 329 |
+
+ ") must be a multiple of the number of channels ("
|
| 330 |
+
+ str(dim)
|
| 331 |
+
+ ")."
|
| 332 |
+
)
|
| 333 |
+
|
| 334 |
+
def _check_axis(self):
|
| 335 |
+
if self.axis == 0:
|
| 336 |
+
raise ValueError(
|
| 337 |
+
"You are trying to normalize your batch axis. Do you want to use tf.layer.batch_normalization instead"
|
| 338 |
+
)
|
| 339 |
+
|
| 340 |
+
def _create_input_spec(self, input_shape):
|
| 341 |
+
dim = input_shape[self.axis]
|
| 342 |
+
self.input_spec = keras.layers.InputSpec(ndim=len(input_shape), axes={self.axis: dim})
|
| 343 |
+
|
| 344 |
+
def _add_gamma_weight(self, input_shape):
|
| 345 |
+
dim = input_shape[self.axis]
|
| 346 |
+
shape = (dim,)
|
| 347 |
+
|
| 348 |
+
if self.scale:
|
| 349 |
+
self.gamma = self.add_weight(
|
| 350 |
+
shape=shape,
|
| 351 |
+
name="gamma",
|
| 352 |
+
initializer=self.gamma_initializer,
|
| 353 |
+
regularizer=self.gamma_regularizer,
|
| 354 |
+
constraint=self.gamma_constraint,
|
| 355 |
+
)
|
| 356 |
+
else:
|
| 357 |
+
self.gamma = None
|
| 358 |
+
|
| 359 |
+
def _add_beta_weight(self, input_shape):
|
| 360 |
+
dim = input_shape[self.axis]
|
| 361 |
+
shape = (dim,)
|
| 362 |
+
|
| 363 |
+
if self.center:
|
| 364 |
+
self.beta = self.add_weight(
|
| 365 |
+
shape=shape,
|
| 366 |
+
name="beta",
|
| 367 |
+
initializer=self.beta_initializer,
|
| 368 |
+
regularizer=self.beta_regularizer,
|
| 369 |
+
constraint=self.beta_constraint,
|
| 370 |
+
)
|
| 371 |
+
else:
|
| 372 |
+
self.beta = None
|
| 373 |
+
|
| 374 |
+
def _create_broadcast_shape(self, input_shape):
|
| 375 |
+
broadcast_shape = [1] * len(input_shape)
|
| 376 |
+
is_instance_norm = (input_shape[self.axis] // self.groups) == 1
|
| 377 |
+
if not is_instance_norm:
|
| 378 |
+
broadcast_shape[self.axis] = input_shape[self.axis] // self.groups
|
| 379 |
+
broadcast_shape.insert(self.axis, self.groups)
|
| 380 |
+
else:
|
| 381 |
+
broadcast_shape[self.axis] = self.groups
|
| 382 |
+
return broadcast_shape
|
| 383 |
+
|
| 384 |
+
|
| 385 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2WeightNormConv1D with Wav2Vec2->Hubert
|
| 386 |
+
class TFHubertWeightNormConv1D(keras.layers.Conv1D):
|
| 387 |
+
"""Adapted from https://www.tensorflow.org/probability/api_docs/python/tfp/layers/weight_norm/WeightNorm"""
|
| 388 |
+
|
| 389 |
+
def __init__(self, filters, kernel_size, groups, explicit_padding, **kwargs):
|
| 390 |
+
super().__init__(
|
| 391 |
+
filters=filters,
|
| 392 |
+
kernel_size=kernel_size,
|
| 393 |
+
groups=groups,
|
| 394 |
+
padding="valid",
|
| 395 |
+
use_bias=True,
|
| 396 |
+
bias_initializer="he_normal",
|
| 397 |
+
**kwargs,
|
| 398 |
+
)
|
| 399 |
+
self.explicit_padding = explicit_padding
|
| 400 |
+
self.filter_axis = 2
|
| 401 |
+
self.kernel_norm_axes = tf.constant([0, 1])
|
| 402 |
+
|
| 403 |
+
def _init_norm(self):
|
| 404 |
+
"""Set the norm of the weight vector."""
|
| 405 |
+
kernel_norm = tf.sqrt(tf.reduce_sum(tf.square(self.weight_v), axis=self.kernel_norm_axes))
|
| 406 |
+
self.weight_g.assign(kernel_norm[:, tf.newaxis, tf.newaxis])
|
| 407 |
+
|
| 408 |
+
def _normalize_kernel(self):
|
| 409 |
+
"""Generate normalized weights."""
|
| 410 |
+
kernel = tf.nn.l2_normalize(self.weight_v, axis=self.kernel_norm_axes) * tf.transpose(self.weight_g)
|
| 411 |
+
self.kernel = tf.transpose(kernel)
|
| 412 |
+
|
| 413 |
+
def build(self, input_shape):
|
| 414 |
+
if not self.built:
|
| 415 |
+
super().build(input_shape)
|
| 416 |
+
|
| 417 |
+
self.kernel = tf.Variable(tf.transpose(self.kernel), name="weight_v", trainable=True)
|
| 418 |
+
self.weight_v = self.kernel
|
| 419 |
+
|
| 420 |
+
self.weight_g = self.add_weight(
|
| 421 |
+
name="weight_g",
|
| 422 |
+
shape=(int(self.weight_v.shape[self.filter_axis]), 1, 1),
|
| 423 |
+
initializer="ones",
|
| 424 |
+
dtype=self.weight_v.dtype,
|
| 425 |
+
trainable=True,
|
| 426 |
+
)
|
| 427 |
+
self._init_norm()
|
| 428 |
+
self.bias = self.add_weight(name="bias", shape=(self.filters,), initializer="zeros", trainable=True)
|
| 429 |
+
|
| 430 |
+
def call(self, inputs):
|
| 431 |
+
# TODO Matt: Assigning to attributes in call() is deeply sinful in TensorFlow, as it should be idempotent.
|
| 432 |
+
# This whole layer should be replaced by a layer that doesn't inherit from Conv1D, but instead calls
|
| 433 |
+
# a functional 1d convolution with normalized weights that it generates (but does not store!)
|
| 434 |
+
self._normalize_kernel()
|
| 435 |
+
|
| 436 |
+
padded_inputs = tf.pad(inputs, ((0, 0), (self.explicit_padding, self.explicit_padding), (0, 0)))
|
| 437 |
+
output = super().call(padded_inputs)
|
| 438 |
+
|
| 439 |
+
return output
|
| 440 |
+
|
| 441 |
+
|
| 442 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2NoLayerNormConvLayer with Wav2Vec2->Hubert
|
| 443 |
+
class TFHubertNoLayerNormConvLayer(keras.layers.Layer):
|
| 444 |
+
def __init__(self, config: HubertConfig, layer_id: int = 0, **kwargs: Any) -> None:
|
| 445 |
+
super().__init__(**kwargs)
|
| 446 |
+
self.in_conv_dim = config.conv_dim[layer_id] if layer_id > 0 else 1
|
| 447 |
+
self.out_conv_dim = config.conv_dim[layer_id]
|
| 448 |
+
|
| 449 |
+
self.conv = keras.layers.Conv1D(
|
| 450 |
+
filters=self.out_conv_dim,
|
| 451 |
+
kernel_size=config.conv_kernel[layer_id],
|
| 452 |
+
strides=config.conv_stride[layer_id],
|
| 453 |
+
use_bias=config.conv_bias,
|
| 454 |
+
name="conv",
|
| 455 |
+
)
|
| 456 |
+
self.activation = get_tf_activation(config.feat_extract_activation)
|
| 457 |
+
|
| 458 |
+
def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
|
| 459 |
+
hidden_states = self.conv(hidden_states)
|
| 460 |
+
hidden_states = self.activation(hidden_states)
|
| 461 |
+
return hidden_states
|
| 462 |
+
|
| 463 |
+
def build(self, input_shape=None):
|
| 464 |
+
if self.built:
|
| 465 |
+
return
|
| 466 |
+
self.built = True
|
| 467 |
+
if getattr(self, "conv", None) is not None:
|
| 468 |
+
with tf.name_scope(self.conv.name):
|
| 469 |
+
self.conv.build([None, None, self.in_conv_dim])
|
| 470 |
+
|
| 471 |
+
|
| 472 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2LayerNormConvLayer with Wav2Vec2->Hubert
|
| 473 |
+
class TFHubertLayerNormConvLayer(keras.layers.Layer):
|
| 474 |
+
def __init__(self, config: HubertConfig, layer_id: int = 0, **kwargs: Any) -> None:
|
| 475 |
+
super().__init__(**kwargs)
|
| 476 |
+
self.in_conv_dim = config.conv_dim[layer_id] if layer_id > 0 else 1
|
| 477 |
+
self.out_conv_dim = config.conv_dim[layer_id]
|
| 478 |
+
|
| 479 |
+
self.conv = keras.layers.Conv1D(
|
| 480 |
+
filters=self.out_conv_dim,
|
| 481 |
+
kernel_size=config.conv_kernel[layer_id],
|
| 482 |
+
strides=config.conv_stride[layer_id],
|
| 483 |
+
use_bias=config.conv_bias,
|
| 484 |
+
name="conv",
|
| 485 |
+
)
|
| 486 |
+
self.layer_norm = keras.layers.LayerNormalization(name="layer_norm", epsilon=config.layer_norm_eps)
|
| 487 |
+
self.activation = get_tf_activation(config.feat_extract_activation)
|
| 488 |
+
|
| 489 |
+
def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
|
| 490 |
+
hidden_states = self.conv(hidden_states)
|
| 491 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 492 |
+
hidden_states = self.activation(hidden_states)
|
| 493 |
+
return hidden_states
|
| 494 |
+
|
| 495 |
+
def build(self, input_shape=None):
|
| 496 |
+
if self.built:
|
| 497 |
+
return
|
| 498 |
+
self.built = True
|
| 499 |
+
if getattr(self, "conv", None) is not None:
|
| 500 |
+
with tf.name_scope(self.conv.name):
|
| 501 |
+
self.conv.build([None, None, self.in_conv_dim])
|
| 502 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 503 |
+
with tf.name_scope(self.layer_norm.name):
|
| 504 |
+
self.layer_norm.build([None, None, self.out_conv_dim])
|
| 505 |
+
|
| 506 |
+
|
| 507 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2GroupNormConvLayer with Wav2Vec2->Hubert
|
| 508 |
+
class TFHubertGroupNormConvLayer(keras.layers.Layer):
|
| 509 |
+
def __init__(self, config: HubertConfig, layer_id: int = 0, **kwargs: Any) -> None:
|
| 510 |
+
super().__init__(**kwargs)
|
| 511 |
+
self.in_conv_dim = config.conv_dim[layer_id] if layer_id > 0 else 1
|
| 512 |
+
self.out_conv_dim = config.conv_dim[layer_id]
|
| 513 |
+
|
| 514 |
+
self.conv = keras.layers.Conv1D(
|
| 515 |
+
filters=self.out_conv_dim,
|
| 516 |
+
kernel_size=config.conv_kernel[layer_id],
|
| 517 |
+
strides=config.conv_stride[layer_id],
|
| 518 |
+
use_bias=config.conv_bias,
|
| 519 |
+
name="conv",
|
| 520 |
+
)
|
| 521 |
+
self.activation = get_tf_activation(config.feat_extract_activation)
|
| 522 |
+
self.layer_norm = TFHubertGroupNorm(groups=self.out_conv_dim, epsilon=config.layer_norm_eps, name="layer_norm")
|
| 523 |
+
|
| 524 |
+
def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
|
| 525 |
+
hidden_states = self.conv(hidden_states)
|
| 526 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 527 |
+
hidden_states = self.activation(hidden_states)
|
| 528 |
+
return hidden_states
|
| 529 |
+
|
| 530 |
+
def build(self, input_shape=None):
|
| 531 |
+
if self.built:
|
| 532 |
+
return
|
| 533 |
+
self.built = True
|
| 534 |
+
if getattr(self, "conv", None) is not None:
|
| 535 |
+
with tf.name_scope(self.conv.name):
|
| 536 |
+
self.conv.build([None, None, self.in_conv_dim])
|
| 537 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 538 |
+
with tf.name_scope(self.layer_norm.name):
|
| 539 |
+
self.layer_norm.build([None, None, self.out_conv_dim])
|
| 540 |
+
|
| 541 |
+
|
| 542 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2PositionalConvEmbedding with Wav2Vec2->Hubert
|
| 543 |
+
class TFHubertPositionalConvEmbedding(keras.layers.Layer):
|
| 544 |
+
def __init__(self, config: HubertConfig, **kwargs: Any) -> None:
|
| 545 |
+
super().__init__(**kwargs)
|
| 546 |
+
self.conv = TFHubertWeightNormConv1D(
|
| 547 |
+
filters=config.hidden_size,
|
| 548 |
+
kernel_size=config.num_conv_pos_embeddings,
|
| 549 |
+
groups=config.num_conv_pos_embedding_groups,
|
| 550 |
+
explicit_padding=config.num_conv_pos_embeddings // 2,
|
| 551 |
+
name="conv",
|
| 552 |
+
)
|
| 553 |
+
self.padding = TFHubertSamePadLayer(config.num_conv_pos_embeddings)
|
| 554 |
+
self.activation = get_tf_activation(config.feat_extract_activation)
|
| 555 |
+
self.config = config
|
| 556 |
+
|
| 557 |
+
def call(self, hidden_states: tf.Tensor) -> tf.Tensor:
|
| 558 |
+
hidden_states = self.conv(hidden_states)
|
| 559 |
+
hidden_states = self.padding(hidden_states)
|
| 560 |
+
hidden_states = self.activation(hidden_states)
|
| 561 |
+
return hidden_states
|
| 562 |
+
|
| 563 |
+
def build(self, input_shape=None):
|
| 564 |
+
if self.built:
|
| 565 |
+
return
|
| 566 |
+
self.built = True
|
| 567 |
+
if getattr(self, "conv", None) is not None:
|
| 568 |
+
with tf.name_scope(self.conv.name):
|
| 569 |
+
self.conv.build([None, None, self.config.hidden_size])
|
| 570 |
+
|
| 571 |
+
|
| 572 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2SamePadLayer with Wav2Vec2->Hubert
|
| 573 |
+
class TFHubertSamePadLayer(keras.layers.Layer):
|
| 574 |
+
def __init__(self, num_conv_pos_embeddings, **kwargs):
|
| 575 |
+
super().__init__(**kwargs)
|
| 576 |
+
self.num_pad_remove = 1 if num_conv_pos_embeddings % 2 == 0 else 0
|
| 577 |
+
|
| 578 |
+
def call(self, hidden_states):
|
| 579 |
+
if self.num_pad_remove > 0:
|
| 580 |
+
hidden_states = hidden_states[:, : -self.num_pad_remove, :]
|
| 581 |
+
return hidden_states
|
| 582 |
+
|
| 583 |
+
|
| 584 |
+
class TFHubertFeatureEncoder(keras.layers.Layer):
|
| 585 |
+
def __init__(self, config: HubertConfig, **kwargs: Any) -> None:
|
| 586 |
+
super().__init__(**kwargs)
|
| 587 |
+
|
| 588 |
+
if config.feat_extract_norm == "group":
|
| 589 |
+
conv_layers = [TFHubertGroupNormConvLayer(config, layer_id=0, name=f"conv_layers.{0}")] + [
|
| 590 |
+
TFHubertNoLayerNormConvLayer(config, layer_id=i + 1, name=f"conv_layers.{i + 1}")
|
| 591 |
+
for i in range(config.num_feat_extract_layers - 1)
|
| 592 |
+
]
|
| 593 |
+
elif config.feat_extract_norm == "layer":
|
| 594 |
+
conv_layers = [
|
| 595 |
+
TFHubertLayerNormConvLayer(config, layer_id=i, name=f"conv_layers.{i}")
|
| 596 |
+
for i in range(config.num_feat_extract_layers)
|
| 597 |
+
]
|
| 598 |
+
else:
|
| 599 |
+
raise ValueError(
|
| 600 |
+
f"`config.feat_extract_norm` is {config.feat_extract_norm}, but has to be one of ['group', 'layer']"
|
| 601 |
+
)
|
| 602 |
+
self.conv_layers = conv_layers
|
| 603 |
+
|
| 604 |
+
def call(self, input_values):
|
| 605 |
+
hidden_states = tf.expand_dims(input_values, -1)
|
| 606 |
+
for conv_layer in self.conv_layers:
|
| 607 |
+
hidden_states = conv_layer(hidden_states)
|
| 608 |
+
return hidden_states
|
| 609 |
+
|
| 610 |
+
def build(self, input_shape=None):
|
| 611 |
+
if self.built:
|
| 612 |
+
return
|
| 613 |
+
self.built = True
|
| 614 |
+
for conv_layer in self.conv_layers:
|
| 615 |
+
with tf.name_scope(conv_layer.name):
|
| 616 |
+
conv_layer.build(None)
|
| 617 |
+
|
| 618 |
+
|
| 619 |
+
class TFHubertFeatureExtractor(TFHubertFeatureEncoder):
|
| 620 |
+
def __init__(self, config, **kwargs):
|
| 621 |
+
super().__init__(config, **kwargs)
|
| 622 |
+
warnings.warn(
|
| 623 |
+
f"The class `{self.__class__.__name__}` has been depreciated "
|
| 624 |
+
"and will be removed in Transformers v5. "
|
| 625 |
+
f"Use `{self.__class__.__bases__[0].__name__}` instead.",
|
| 626 |
+
FutureWarning,
|
| 627 |
+
)
|
| 628 |
+
|
| 629 |
+
|
| 630 |
+
class TFHubertFeatureProjection(keras.layers.Layer):
|
| 631 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 632 |
+
super().__init__(**kwargs)
|
| 633 |
+
|
| 634 |
+
self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm")
|
| 635 |
+
self.projection = keras.layers.Dense(
|
| 636 |
+
units=config.hidden_size,
|
| 637 |
+
kernel_initializer=get_initializer(config.initializer_range),
|
| 638 |
+
bias_initializer="zeros",
|
| 639 |
+
name="projection",
|
| 640 |
+
)
|
| 641 |
+
self.dropout = keras.layers.Dropout(rate=config.feat_proj_dropout)
|
| 642 |
+
self.config = config
|
| 643 |
+
|
| 644 |
+
def call(self, hidden_states: tf.Tensor, training: bool = False) -> tf.Tensor:
|
| 645 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 646 |
+
hidden_states = self.projection(hidden_states)
|
| 647 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 648 |
+
return hidden_states
|
| 649 |
+
|
| 650 |
+
def build(self, input_shape=None):
|
| 651 |
+
if self.built:
|
| 652 |
+
return
|
| 653 |
+
self.built = True
|
| 654 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 655 |
+
with tf.name_scope(self.layer_norm.name):
|
| 656 |
+
self.layer_norm.build([None, None, self.config.conv_dim[-1]])
|
| 657 |
+
if getattr(self, "projection", None) is not None:
|
| 658 |
+
with tf.name_scope(self.projection.name):
|
| 659 |
+
self.projection.build([None, None, self.config.conv_dim[-1]])
|
| 660 |
+
|
| 661 |
+
|
| 662 |
+
# Copied from transformers.models.bart.modeling_tf_bart.TFBartAttention with TFBart->TFHubert
|
| 663 |
+
class TFHubertAttention(keras.layers.Layer):
|
| 664 |
+
"""Multi-headed attention from "Attention Is All You Need"""
|
| 665 |
+
|
| 666 |
+
def __init__(
|
| 667 |
+
self,
|
| 668 |
+
embed_dim: int,
|
| 669 |
+
num_heads: int,
|
| 670 |
+
dropout: float = 0.0,
|
| 671 |
+
is_decoder: bool = False,
|
| 672 |
+
bias: bool = True,
|
| 673 |
+
**kwargs,
|
| 674 |
+
):
|
| 675 |
+
super().__init__(**kwargs)
|
| 676 |
+
self.embed_dim = embed_dim
|
| 677 |
+
|
| 678 |
+
self.num_heads = num_heads
|
| 679 |
+
self.dropout = keras.layers.Dropout(dropout)
|
| 680 |
+
self.head_dim = embed_dim // num_heads
|
| 681 |
+
if (self.head_dim * num_heads) != self.embed_dim:
|
| 682 |
+
raise ValueError(
|
| 683 |
+
f"embed_dim must be divisible by num_heads (got `embed_dim`: {self.embed_dim}"
|
| 684 |
+
f" and `num_heads`: {num_heads})."
|
| 685 |
+
)
|
| 686 |
+
self.scaling = self.head_dim**-0.5
|
| 687 |
+
self.is_decoder = is_decoder
|
| 688 |
+
|
| 689 |
+
self.k_proj = keras.layers.Dense(embed_dim, use_bias=bias, name="k_proj")
|
| 690 |
+
self.q_proj = keras.layers.Dense(embed_dim, use_bias=bias, name="q_proj")
|
| 691 |
+
self.v_proj = keras.layers.Dense(embed_dim, use_bias=bias, name="v_proj")
|
| 692 |
+
self.out_proj = keras.layers.Dense(embed_dim, use_bias=bias, name="out_proj")
|
| 693 |
+
|
| 694 |
+
def _shape(self, tensor: tf.Tensor, seq_len: int, bsz: int):
|
| 695 |
+
return tf.transpose(tf.reshape(tensor, (bsz, seq_len, self.num_heads, self.head_dim)), (0, 2, 1, 3))
|
| 696 |
+
|
| 697 |
+
def call(
|
| 698 |
+
self,
|
| 699 |
+
hidden_states: tf.Tensor,
|
| 700 |
+
key_value_states: tf.Tensor | None = None,
|
| 701 |
+
past_key_value: tuple[tuple[tf.Tensor]] | None = None,
|
| 702 |
+
attention_mask: tf.Tensor | None = None,
|
| 703 |
+
layer_head_mask: tf.Tensor | None = None,
|
| 704 |
+
training: bool | None = False,
|
| 705 |
+
) -> tuple[tf.Tensor, tf.Tensor | None]:
|
| 706 |
+
"""Input shape: Batch x Time x Channel"""
|
| 707 |
+
|
| 708 |
+
# if key_value_states are provided this layer is used as a cross-attention layer
|
| 709 |
+
# for the decoder
|
| 710 |
+
is_cross_attention = key_value_states is not None
|
| 711 |
+
bsz, tgt_len, embed_dim = shape_list(hidden_states)
|
| 712 |
+
|
| 713 |
+
# get query proj
|
| 714 |
+
query_states = self.q_proj(hidden_states) * self.scaling
|
| 715 |
+
# get key, value proj
|
| 716 |
+
if is_cross_attention and past_key_value is not None:
|
| 717 |
+
# reuse k,v, cross_attentions
|
| 718 |
+
key_states = past_key_value[0]
|
| 719 |
+
value_states = past_key_value[1]
|
| 720 |
+
elif is_cross_attention:
|
| 721 |
+
# cross_attentions
|
| 722 |
+
key_states = self._shape(self.k_proj(key_value_states), -1, bsz)
|
| 723 |
+
value_states = self._shape(self.v_proj(key_value_states), -1, bsz)
|
| 724 |
+
elif past_key_value is not None:
|
| 725 |
+
# reuse k, v, self_attention
|
| 726 |
+
key_states = self._shape(self.k_proj(hidden_states), -1, bsz)
|
| 727 |
+
value_states = self._shape(self.v_proj(hidden_states), -1, bsz)
|
| 728 |
+
key_states = tf.concat([past_key_value[0], key_states], axis=2)
|
| 729 |
+
value_states = tf.concat([past_key_value[1], value_states], axis=2)
|
| 730 |
+
else:
|
| 731 |
+
# self_attention
|
| 732 |
+
key_states = self._shape(self.k_proj(hidden_states), -1, bsz)
|
| 733 |
+
value_states = self._shape(self.v_proj(hidden_states), -1, bsz)
|
| 734 |
+
|
| 735 |
+
if self.is_decoder:
|
| 736 |
+
# if cross_attention save Tuple(tf.Tensor, tf.Tensor) of all cross attention key/value_states.
|
| 737 |
+
# Further calls to cross_attention layer can then reuse all cross-attention
|
| 738 |
+
# key/value_states (first "if" case)
|
| 739 |
+
# if uni-directional self-attention (decoder) save Tuple(tf.Tensor, tf.Tensor) of
|
| 740 |
+
# all previous decoder key/value_states. Further calls to uni-directional self-attention
|
| 741 |
+
# can concat previous decoder key/value_states to current projected key/value_states (third "elif" case)
|
| 742 |
+
# if encoder bi-directional self-attention `past_key_value` is always `None`
|
| 743 |
+
past_key_value = (key_states, value_states)
|
| 744 |
+
|
| 745 |
+
proj_shape = (bsz * self.num_heads, -1, self.head_dim)
|
| 746 |
+
query_states = tf.reshape(self._shape(query_states, tgt_len, bsz), proj_shape)
|
| 747 |
+
key_states = tf.reshape(key_states, proj_shape)
|
| 748 |
+
value_states = tf.reshape(value_states, proj_shape)
|
| 749 |
+
|
| 750 |
+
src_len = shape_list(key_states)[1]
|
| 751 |
+
attn_weights = tf.matmul(query_states, key_states, transpose_b=True)
|
| 752 |
+
|
| 753 |
+
tf.debugging.assert_equal(
|
| 754 |
+
shape_list(attn_weights),
|
| 755 |
+
[bsz * self.num_heads, tgt_len, src_len],
|
| 756 |
+
message=(
|
| 757 |
+
f"Attention weights should be of size {(bsz * self.num_heads, tgt_len, src_len)}, but is"
|
| 758 |
+
f" {shape_list(attn_weights)}"
|
| 759 |
+
),
|
| 760 |
+
)
|
| 761 |
+
|
| 762 |
+
if attention_mask is not None:
|
| 763 |
+
tf.debugging.assert_equal(
|
| 764 |
+
shape_list(attention_mask),
|
| 765 |
+
[bsz, 1, tgt_len, src_len],
|
| 766 |
+
message=(
|
| 767 |
+
f"Attention mask should be of size {(bsz, 1, tgt_len, src_len)}, but is"
|
| 768 |
+
f" {shape_list(attention_mask)}"
|
| 769 |
+
),
|
| 770 |
+
)
|
| 771 |
+
|
| 772 |
+
attention_mask = tf.cast(attention_mask, dtype=attn_weights.dtype)
|
| 773 |
+
attn_weights = tf.reshape(attn_weights, (bsz, self.num_heads, tgt_len, src_len)) + attention_mask
|
| 774 |
+
attn_weights = tf.reshape(attn_weights, (bsz * self.num_heads, tgt_len, src_len))
|
| 775 |
+
|
| 776 |
+
attn_weights = stable_softmax(attn_weights, axis=-1)
|
| 777 |
+
|
| 778 |
+
if layer_head_mask is not None:
|
| 779 |
+
tf.debugging.assert_equal(
|
| 780 |
+
shape_list(layer_head_mask),
|
| 781 |
+
[self.num_heads],
|
| 782 |
+
message=(
|
| 783 |
+
f"Head mask for a single layer should be of size {(self.num_heads)}, but is"
|
| 784 |
+
f" {shape_list(layer_head_mask)}"
|
| 785 |
+
),
|
| 786 |
+
)
|
| 787 |
+
|
| 788 |
+
attn_weights = tf.reshape(layer_head_mask, (1, -1, 1, 1)) * tf.reshape(
|
| 789 |
+
attn_weights, (bsz, self.num_heads, tgt_len, src_len)
|
| 790 |
+
)
|
| 791 |
+
attn_weights = tf.reshape(attn_weights, (bsz * self.num_heads, tgt_len, src_len))
|
| 792 |
+
|
| 793 |
+
attn_probs = self.dropout(attn_weights, training=training)
|
| 794 |
+
attn_output = tf.matmul(attn_probs, value_states)
|
| 795 |
+
|
| 796 |
+
tf.debugging.assert_equal(
|
| 797 |
+
shape_list(attn_output),
|
| 798 |
+
[bsz * self.num_heads, tgt_len, self.head_dim],
|
| 799 |
+
message=(
|
| 800 |
+
f"`attn_output` should be of size {(bsz, self.num_heads, tgt_len, self.head_dim)}, but is"
|
| 801 |
+
f" {shape_list(attn_output)}"
|
| 802 |
+
),
|
| 803 |
+
)
|
| 804 |
+
|
| 805 |
+
attn_output = tf.transpose(
|
| 806 |
+
tf.reshape(attn_output, (bsz, self.num_heads, tgt_len, self.head_dim)), (0, 2, 1, 3)
|
| 807 |
+
)
|
| 808 |
+
attn_output = tf.reshape(attn_output, (bsz, tgt_len, embed_dim))
|
| 809 |
+
|
| 810 |
+
attn_output = self.out_proj(attn_output)
|
| 811 |
+
attn_weights: tf.Tensor = tf.reshape(attn_weights, (bsz, self.num_heads, tgt_len, src_len))
|
| 812 |
+
|
| 813 |
+
return attn_output, attn_weights, past_key_value
|
| 814 |
+
|
| 815 |
+
def build(self, input_shape=None):
|
| 816 |
+
if self.built:
|
| 817 |
+
return
|
| 818 |
+
self.built = True
|
| 819 |
+
if getattr(self, "k_proj", None) is not None:
|
| 820 |
+
with tf.name_scope(self.k_proj.name):
|
| 821 |
+
self.k_proj.build([None, None, self.embed_dim])
|
| 822 |
+
if getattr(self, "q_proj", None) is not None:
|
| 823 |
+
with tf.name_scope(self.q_proj.name):
|
| 824 |
+
self.q_proj.build([None, None, self.embed_dim])
|
| 825 |
+
if getattr(self, "v_proj", None) is not None:
|
| 826 |
+
with tf.name_scope(self.v_proj.name):
|
| 827 |
+
self.v_proj.build([None, None, self.embed_dim])
|
| 828 |
+
if getattr(self, "out_proj", None) is not None:
|
| 829 |
+
with tf.name_scope(self.out_proj.name):
|
| 830 |
+
self.out_proj.build([None, None, self.embed_dim])
|
| 831 |
+
|
| 832 |
+
|
| 833 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2FeedForward with Wav2Vec2->Hubert
|
| 834 |
+
class TFHubertFeedForward(keras.layers.Layer):
|
| 835 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 836 |
+
super().__init__(**kwargs)
|
| 837 |
+
|
| 838 |
+
self.intermediate_dropout = keras.layers.Dropout(config.activation_dropout)
|
| 839 |
+
|
| 840 |
+
self.intermediate_dense = keras.layers.Dense(
|
| 841 |
+
units=config.intermediate_size,
|
| 842 |
+
kernel_initializer=get_initializer(config.initializer_range),
|
| 843 |
+
bias_initializer="zeros",
|
| 844 |
+
name="intermediate_dense",
|
| 845 |
+
)
|
| 846 |
+
self.intermediate_act_fn = get_tf_activation(config.hidden_act)
|
| 847 |
+
|
| 848 |
+
self.output_dense = keras.layers.Dense(
|
| 849 |
+
units=config.hidden_size,
|
| 850 |
+
kernel_initializer=get_initializer(config.initializer_range),
|
| 851 |
+
bias_initializer="zeros",
|
| 852 |
+
name="output_dense",
|
| 853 |
+
)
|
| 854 |
+
self.output_dropout = keras.layers.Dropout(config.hidden_dropout)
|
| 855 |
+
self.config = config
|
| 856 |
+
|
| 857 |
+
def call(self, hidden_states: tf.Tensor, training: bool = False) -> tf.Tensor:
|
| 858 |
+
hidden_states = self.intermediate_dense(hidden_states)
|
| 859 |
+
hidden_states = self.intermediate_act_fn(hidden_states)
|
| 860 |
+
hidden_states = self.intermediate_dropout(hidden_states, training=training)
|
| 861 |
+
|
| 862 |
+
hidden_states = self.output_dense(hidden_states)
|
| 863 |
+
hidden_states = self.output_dropout(hidden_states, training=training)
|
| 864 |
+
return hidden_states
|
| 865 |
+
|
| 866 |
+
def build(self, input_shape=None):
|
| 867 |
+
if self.built:
|
| 868 |
+
return
|
| 869 |
+
self.built = True
|
| 870 |
+
if getattr(self, "intermediate_dense", None) is not None:
|
| 871 |
+
with tf.name_scope(self.intermediate_dense.name):
|
| 872 |
+
self.intermediate_dense.build([None, None, self.config.hidden_size])
|
| 873 |
+
if getattr(self, "output_dense", None) is not None:
|
| 874 |
+
with tf.name_scope(self.output_dense.name):
|
| 875 |
+
self.output_dense.build([None, None, self.config.intermediate_size])
|
| 876 |
+
|
| 877 |
+
|
| 878 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2EncoderLayer with Wav2Vec2->Hubert
|
| 879 |
+
class TFHubertEncoderLayer(keras.layers.Layer):
|
| 880 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 881 |
+
super().__init__(**kwargs)
|
| 882 |
+
self.attention = TFHubertAttention(
|
| 883 |
+
embed_dim=config.hidden_size,
|
| 884 |
+
num_heads=config.num_attention_heads,
|
| 885 |
+
dropout=config.attention_dropout,
|
| 886 |
+
is_decoder=False,
|
| 887 |
+
name="attention",
|
| 888 |
+
)
|
| 889 |
+
self.dropout = keras.layers.Dropout(config.hidden_dropout)
|
| 890 |
+
self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm")
|
| 891 |
+
self.feed_forward = TFHubertFeedForward(config, name="feed_forward")
|
| 892 |
+
self.final_layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="final_layer_norm")
|
| 893 |
+
self.config = config
|
| 894 |
+
|
| 895 |
+
def call(
|
| 896 |
+
self,
|
| 897 |
+
hidden_states: tf.Tensor,
|
| 898 |
+
attention_mask: tf.Tensor | None = None,
|
| 899 |
+
output_attentions: bool | None = False,
|
| 900 |
+
training: bool = False,
|
| 901 |
+
) -> tuple[tf.Tensor]:
|
| 902 |
+
attn_residual = hidden_states
|
| 903 |
+
hidden_states, attn_weights, _ = self.attention(
|
| 904 |
+
hidden_states, attention_mask=attention_mask, training=training
|
| 905 |
+
)
|
| 906 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 907 |
+
hidden_states = attn_residual + hidden_states
|
| 908 |
+
|
| 909 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 910 |
+
hidden_states = hidden_states + self.feed_forward(hidden_states)
|
| 911 |
+
hidden_states = self.final_layer_norm(hidden_states)
|
| 912 |
+
|
| 913 |
+
outputs = (hidden_states,)
|
| 914 |
+
|
| 915 |
+
if output_attentions:
|
| 916 |
+
outputs += (attn_weights,)
|
| 917 |
+
|
| 918 |
+
return outputs
|
| 919 |
+
|
| 920 |
+
def build(self, input_shape=None):
|
| 921 |
+
if self.built:
|
| 922 |
+
return
|
| 923 |
+
self.built = True
|
| 924 |
+
if getattr(self, "attention", None) is not None:
|
| 925 |
+
with tf.name_scope(self.attention.name):
|
| 926 |
+
self.attention.build(None)
|
| 927 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 928 |
+
with tf.name_scope(self.layer_norm.name):
|
| 929 |
+
self.layer_norm.build([None, None, self.config.hidden_size])
|
| 930 |
+
if getattr(self, "feed_forward", None) is not None:
|
| 931 |
+
with tf.name_scope(self.feed_forward.name):
|
| 932 |
+
self.feed_forward.build(None)
|
| 933 |
+
if getattr(self, "final_layer_norm", None) is not None:
|
| 934 |
+
with tf.name_scope(self.final_layer_norm.name):
|
| 935 |
+
self.final_layer_norm.build([None, None, self.config.hidden_size])
|
| 936 |
+
|
| 937 |
+
|
| 938 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2EncoderLayerStableLayerNorm with Wav2Vec2->Hubert
|
| 939 |
+
class TFHubertEncoderLayerStableLayerNorm(keras.layers.Layer):
|
| 940 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 941 |
+
super().__init__(**kwargs)
|
| 942 |
+
self.attention = TFHubertAttention(
|
| 943 |
+
embed_dim=config.hidden_size,
|
| 944 |
+
num_heads=config.num_attention_heads,
|
| 945 |
+
dropout=config.attention_dropout,
|
| 946 |
+
is_decoder=False,
|
| 947 |
+
name="attention",
|
| 948 |
+
)
|
| 949 |
+
self.dropout = keras.layers.Dropout(config.hidden_dropout)
|
| 950 |
+
self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm")
|
| 951 |
+
self.feed_forward = TFHubertFeedForward(config, name="feed_forward")
|
| 952 |
+
self.final_layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="final_layer_norm")
|
| 953 |
+
self.config = config
|
| 954 |
+
|
| 955 |
+
def call(
|
| 956 |
+
self,
|
| 957 |
+
hidden_states: tf.Tensor,
|
| 958 |
+
attention_mask: tf.Tensor | None = None,
|
| 959 |
+
output_attentions: bool | None = False,
|
| 960 |
+
training: bool = False,
|
| 961 |
+
) -> tuple[tf.Tensor]:
|
| 962 |
+
attn_residual = hidden_states
|
| 963 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 964 |
+
hidden_states, attn_weights, _ = self.attention(
|
| 965 |
+
hidden_states, attention_mask=attention_mask, training=training
|
| 966 |
+
)
|
| 967 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 968 |
+
hidden_states = attn_residual + hidden_states
|
| 969 |
+
hidden_states = hidden_states + self.feed_forward(self.final_layer_norm(hidden_states))
|
| 970 |
+
|
| 971 |
+
outputs = (hidden_states,)
|
| 972 |
+
|
| 973 |
+
if output_attentions:
|
| 974 |
+
outputs += (attn_weights,)
|
| 975 |
+
|
| 976 |
+
return outputs
|
| 977 |
+
|
| 978 |
+
def build(self, input_shape=None):
|
| 979 |
+
if self.built:
|
| 980 |
+
return
|
| 981 |
+
self.built = True
|
| 982 |
+
if getattr(self, "attention", None) is not None:
|
| 983 |
+
with tf.name_scope(self.attention.name):
|
| 984 |
+
self.attention.build(None)
|
| 985 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 986 |
+
with tf.name_scope(self.layer_norm.name):
|
| 987 |
+
self.layer_norm.build([None, None, self.config.hidden_size])
|
| 988 |
+
if getattr(self, "feed_forward", None) is not None:
|
| 989 |
+
with tf.name_scope(self.feed_forward.name):
|
| 990 |
+
self.feed_forward.build(None)
|
| 991 |
+
if getattr(self, "final_layer_norm", None) is not None:
|
| 992 |
+
with tf.name_scope(self.final_layer_norm.name):
|
| 993 |
+
self.final_layer_norm.build([None, None, self.config.hidden_size])
|
| 994 |
+
|
| 995 |
+
|
| 996 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2Encoder with Wav2Vec2->Hubert
|
| 997 |
+
class TFHubertEncoder(keras.layers.Layer):
|
| 998 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 999 |
+
super().__init__(**kwargs)
|
| 1000 |
+
self.config = config
|
| 1001 |
+
self.pos_conv_embed = TFHubertPositionalConvEmbedding(config, name="pos_conv_embed")
|
| 1002 |
+
self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm")
|
| 1003 |
+
self.dropout = keras.layers.Dropout(config.hidden_dropout)
|
| 1004 |
+
self.layer = [TFHubertEncoderLayer(config, name=f"layers.{i}") for i in range(config.num_hidden_layers)]
|
| 1005 |
+
|
| 1006 |
+
def call(
|
| 1007 |
+
self,
|
| 1008 |
+
hidden_states: tf.Tensor,
|
| 1009 |
+
attention_mask: tf.Tensor | None = None,
|
| 1010 |
+
output_attentions: bool | None = False,
|
| 1011 |
+
output_hidden_states: bool | None = False,
|
| 1012 |
+
return_dict: bool | None = True,
|
| 1013 |
+
training: bool | None = False,
|
| 1014 |
+
) -> TFBaseModelOutput | tuple[tf.Tensor]:
|
| 1015 |
+
all_hidden_states = () if output_hidden_states else None
|
| 1016 |
+
all_self_attentions = () if output_attentions else None
|
| 1017 |
+
|
| 1018 |
+
if attention_mask is not None:
|
| 1019 |
+
hidden_states = hidden_states * tf.expand_dims(attention_mask, -1)
|
| 1020 |
+
attention_mask = _expand_mask(attention_mask)
|
| 1021 |
+
else:
|
| 1022 |
+
attention_mask = None
|
| 1023 |
+
|
| 1024 |
+
position_embeddings = self.pos_conv_embed(hidden_states)
|
| 1025 |
+
hidden_states = hidden_states + position_embeddings
|
| 1026 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 1027 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 1028 |
+
|
| 1029 |
+
for i, layer_module in enumerate(self.layer):
|
| 1030 |
+
if output_hidden_states:
|
| 1031 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1032 |
+
|
| 1033 |
+
# add LayerDrop (see https://huggingface.co/papers/1909.11556 for description)
|
| 1034 |
+
dropout_probability = np.random.uniform(0, 1)
|
| 1035 |
+
if training and (dropout_probability < self.config.layerdrop): # skip the layer
|
| 1036 |
+
continue
|
| 1037 |
+
|
| 1038 |
+
layer_outputs = layer_module(
|
| 1039 |
+
hidden_states=hidden_states,
|
| 1040 |
+
attention_mask=attention_mask,
|
| 1041 |
+
output_attentions=output_attentions,
|
| 1042 |
+
training=training,
|
| 1043 |
+
)
|
| 1044 |
+
hidden_states = layer_outputs[0]
|
| 1045 |
+
|
| 1046 |
+
if output_attentions:
|
| 1047 |
+
all_self_attentions = all_self_attentions + (layer_outputs[1],)
|
| 1048 |
+
|
| 1049 |
+
# Add last layer
|
| 1050 |
+
if output_hidden_states:
|
| 1051 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1052 |
+
|
| 1053 |
+
if not return_dict:
|
| 1054 |
+
return tuple(v for v in [hidden_states, all_hidden_states, all_self_attentions] if v is not None)
|
| 1055 |
+
return TFBaseModelOutput(
|
| 1056 |
+
last_hidden_state=hidden_states,
|
| 1057 |
+
hidden_states=all_hidden_states,
|
| 1058 |
+
attentions=all_self_attentions,
|
| 1059 |
+
)
|
| 1060 |
+
|
| 1061 |
+
def build(self, input_shape=None):
|
| 1062 |
+
if self.built:
|
| 1063 |
+
return
|
| 1064 |
+
self.built = True
|
| 1065 |
+
if getattr(self, "pos_conv_embed", None) is not None:
|
| 1066 |
+
with tf.name_scope(self.pos_conv_embed.name):
|
| 1067 |
+
self.pos_conv_embed.build(None)
|
| 1068 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 1069 |
+
with tf.name_scope(self.layer_norm.name):
|
| 1070 |
+
self.layer_norm.build([None, None, self.config.hidden_size])
|
| 1071 |
+
if getattr(self, "layer", None) is not None:
|
| 1072 |
+
for layer in self.layer:
|
| 1073 |
+
with tf.name_scope(layer.name):
|
| 1074 |
+
layer.build(None)
|
| 1075 |
+
|
| 1076 |
+
|
| 1077 |
+
# Copied from transformers.models.wav2vec2.modeling_tf_wav2vec2.TFWav2Vec2EncoderStableLayerNorm with Wav2Vec2->Hubert
|
| 1078 |
+
class TFHubertEncoderStableLayerNorm(keras.layers.Layer):
|
| 1079 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 1080 |
+
super().__init__(**kwargs)
|
| 1081 |
+
self.config = config
|
| 1082 |
+
self.pos_conv_embed = TFHubertPositionalConvEmbedding(config, name="pos_conv_embed")
|
| 1083 |
+
self.layer_norm = keras.layers.LayerNormalization(epsilon=config.layer_norm_eps, name="layer_norm")
|
| 1084 |
+
self.dropout = keras.layers.Dropout(config.hidden_dropout)
|
| 1085 |
+
self.layer = [
|
| 1086 |
+
TFHubertEncoderLayerStableLayerNorm(config, name=f"layers.{i}") for i in range(config.num_hidden_layers)
|
| 1087 |
+
]
|
| 1088 |
+
|
| 1089 |
+
def call(
|
| 1090 |
+
self,
|
| 1091 |
+
hidden_states: tf.Tensor,
|
| 1092 |
+
attention_mask: tf.Tensor | None = None,
|
| 1093 |
+
output_attentions: bool | None = False,
|
| 1094 |
+
output_hidden_states: bool | None = False,
|
| 1095 |
+
return_dict: bool | None = True,
|
| 1096 |
+
training: bool | None = False,
|
| 1097 |
+
) -> TFBaseModelOutput | tuple[tf.Tensor]:
|
| 1098 |
+
all_hidden_states = () if output_hidden_states else None
|
| 1099 |
+
all_self_attentions = () if output_attentions else None
|
| 1100 |
+
|
| 1101 |
+
if attention_mask is not None:
|
| 1102 |
+
hidden_states = hidden_states * tf.expand_dims(attention_mask, -1)
|
| 1103 |
+
attention_mask = _expand_mask(attention_mask)
|
| 1104 |
+
else:
|
| 1105 |
+
attention_mask = None
|
| 1106 |
+
|
| 1107 |
+
position_embeddings = self.pos_conv_embed(hidden_states)
|
| 1108 |
+
hidden_states = hidden_states + position_embeddings
|
| 1109 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 1110 |
+
|
| 1111 |
+
for i, layer_module in enumerate(self.layer):
|
| 1112 |
+
if output_hidden_states:
|
| 1113 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1114 |
+
|
| 1115 |
+
# add LayerDrop (see https://huggingface.co/papers/1909.11556 for description)
|
| 1116 |
+
dropout_probability = np.random.uniform(0, 1)
|
| 1117 |
+
if training and (dropout_probability < self.config.layerdrop): # skip the layer
|
| 1118 |
+
continue
|
| 1119 |
+
|
| 1120 |
+
layer_outputs = layer_module(
|
| 1121 |
+
hidden_states=hidden_states,
|
| 1122 |
+
attention_mask=attention_mask,
|
| 1123 |
+
output_attentions=output_attentions,
|
| 1124 |
+
training=training,
|
| 1125 |
+
)
|
| 1126 |
+
hidden_states = layer_outputs[0]
|
| 1127 |
+
|
| 1128 |
+
if output_attentions:
|
| 1129 |
+
all_self_attentions = all_self_attentions + (layer_outputs[1],)
|
| 1130 |
+
|
| 1131 |
+
hidden_states = self.layer_norm(hidden_states)
|
| 1132 |
+
|
| 1133 |
+
if output_hidden_states:
|
| 1134 |
+
all_hidden_states = all_hidden_states + (hidden_states,)
|
| 1135 |
+
|
| 1136 |
+
if not return_dict:
|
| 1137 |
+
return tuple(v for v in [hidden_states, all_hidden_states, all_self_attentions] if v is not None)
|
| 1138 |
+
return TFBaseModelOutput(
|
| 1139 |
+
last_hidden_state=hidden_states,
|
| 1140 |
+
hidden_states=all_hidden_states,
|
| 1141 |
+
attentions=all_self_attentions,
|
| 1142 |
+
)
|
| 1143 |
+
|
| 1144 |
+
def build(self, input_shape=None):
|
| 1145 |
+
if self.built:
|
| 1146 |
+
return
|
| 1147 |
+
self.built = True
|
| 1148 |
+
if getattr(self, "pos_conv_embed", None) is not None:
|
| 1149 |
+
with tf.name_scope(self.pos_conv_embed.name):
|
| 1150 |
+
self.pos_conv_embed.build(None)
|
| 1151 |
+
if getattr(self, "layer_norm", None) is not None:
|
| 1152 |
+
with tf.name_scope(self.layer_norm.name):
|
| 1153 |
+
self.layer_norm.build([None, None, self.config.hidden_size])
|
| 1154 |
+
if getattr(self, "layer", None) is not None:
|
| 1155 |
+
for layer in self.layer:
|
| 1156 |
+
with tf.name_scope(layer.name):
|
| 1157 |
+
layer.build(None)
|
| 1158 |
+
|
| 1159 |
+
|
| 1160 |
+
@keras_serializable
|
| 1161 |
+
class TFHubertMainLayer(keras.layers.Layer):
|
| 1162 |
+
config_class = HubertConfig
|
| 1163 |
+
|
| 1164 |
+
def __init__(self, config: HubertConfig, **kwargs):
|
| 1165 |
+
super().__init__(**kwargs)
|
| 1166 |
+
self.config = config
|
| 1167 |
+
self.feature_extractor = TFHubertFeatureEncoder(config, name="feature_extractor")
|
| 1168 |
+
self.feature_projection = TFHubertFeatureProjection(config, name="feature_projection")
|
| 1169 |
+
|
| 1170 |
+
if config.do_stable_layer_norm:
|
| 1171 |
+
self.encoder = TFHubertEncoderStableLayerNorm(config, name="encoder")
|
| 1172 |
+
else:
|
| 1173 |
+
self.encoder = TFHubertEncoder(config, name="encoder")
|
| 1174 |
+
|
| 1175 |
+
def build(self, input_shape=None):
|
| 1176 |
+
self.masked_spec_embed = self.add_weight(
|
| 1177 |
+
shape=(self.config.hidden_size,), initializer="uniform", trainable=True, name="masked_spec_embed"
|
| 1178 |
+
)
|
| 1179 |
+
|
| 1180 |
+
if self.built:
|
| 1181 |
+
return
|
| 1182 |
+
self.built = True
|
| 1183 |
+
if getattr(self, "feature_extractor", None) is not None:
|
| 1184 |
+
with tf.name_scope(self.feature_extractor.name):
|
| 1185 |
+
self.feature_extractor.build(None)
|
| 1186 |
+
if getattr(self, "feature_projection", None) is not None:
|
| 1187 |
+
with tf.name_scope(self.feature_projection.name):
|
| 1188 |
+
self.feature_projection.build(None)
|
| 1189 |
+
if getattr(self, "encoder", None) is not None:
|
| 1190 |
+
with tf.name_scope(self.encoder.name):
|
| 1191 |
+
self.encoder.build(None)
|
| 1192 |
+
|
| 1193 |
+
def _get_feat_extract_output_lengths(self, input_lengths: tf.Tensor):
|
| 1194 |
+
"""
|
| 1195 |
+
Computes the output length of the convolutional layers
|
| 1196 |
+
"""
|
| 1197 |
+
|
| 1198 |
+
def _conv_out_length(input_length, kernel_size, stride):
|
| 1199 |
+
# 1D convolutional layer output length formula taken
|
| 1200 |
+
# from https://pytorch.org/docs/stable/generated/torch.nn.Conv1d.html
|
| 1201 |
+
return (input_length - kernel_size) // stride + 1
|
| 1202 |
+
|
| 1203 |
+
for kernel_size, stride in zip(self.config.conv_kernel, self.config.conv_stride):
|
| 1204 |
+
input_lengths = _conv_out_length(input_lengths, kernel_size, stride)
|
| 1205 |
+
|
| 1206 |
+
return input_lengths
|
| 1207 |
+
|
| 1208 |
+
def _mask_hidden_states(self, hidden_states: tf.Tensor, mask_time_indices: tf.Tensor | None = None):
|
| 1209 |
+
"""
|
| 1210 |
+
Masks extracted features along time axis and/or along feature axis according to
|
| 1211 |
+
[SpecAugment](https://huggingface.co/papers/1904.08779).
|
| 1212 |
+
"""
|
| 1213 |
+
batch_size, sequence_length, hidden_size = shape_list(hidden_states)
|
| 1214 |
+
|
| 1215 |
+
# `config.apply_spec_augment` can set masking to False
|
| 1216 |
+
if not getattr(self.config, "apply_spec_augment", True):
|
| 1217 |
+
return hidden_states
|
| 1218 |
+
|
| 1219 |
+
if mask_time_indices is not None:
|
| 1220 |
+
# apply SpecAugment along time axis with given mask_time_indices
|
| 1221 |
+
hidden_states = tf.where(
|
| 1222 |
+
tf.cast(mask_time_indices[:, :, tf.newaxis], tf.bool),
|
| 1223 |
+
self.masked_spec_embed[tf.newaxis, tf.newaxis, :],
|
| 1224 |
+
hidden_states,
|
| 1225 |
+
)
|
| 1226 |
+
|
| 1227 |
+
elif self.config.mask_time_prob > 0:
|
| 1228 |
+
# generate indices & apply SpecAugment along time axis
|
| 1229 |
+
mask_time_indices = _compute_mask_indices(
|
| 1230 |
+
(batch_size, sequence_length),
|
| 1231 |
+
mask_prob=self.config.mask_time_prob,
|
| 1232 |
+
mask_length=self.config.mask_time_length,
|
| 1233 |
+
min_masks=2,
|
| 1234 |
+
)
|
| 1235 |
+
hidden_states = tf.where(
|
| 1236 |
+
tf.cast(mask_time_indices[:, :, tf.newaxis], tf.bool),
|
| 1237 |
+
self.masked_spec_embed[tf.newaxis, tf.newaxis, :],
|
| 1238 |
+
hidden_states,
|
| 1239 |
+
)
|
| 1240 |
+
|
| 1241 |
+
# apply SpecAugment along feature axis
|
| 1242 |
+
if self.config.mask_feature_prob > 0:
|
| 1243 |
+
mask_feature_indices = _compute_mask_indices(
|
| 1244 |
+
(batch_size, hidden_size),
|
| 1245 |
+
mask_prob=self.config.mask_feature_prob,
|
| 1246 |
+
mask_length=self.config.mask_feature_length,
|
| 1247 |
+
)
|
| 1248 |
+
hidden_states = tf.where(mask_feature_indices[:, tf.newaxis, :], hidden_states, 0)
|
| 1249 |
+
|
| 1250 |
+
return hidden_states
|
| 1251 |
+
|
| 1252 |
+
@unpack_inputs
|
| 1253 |
+
def call(
|
| 1254 |
+
self,
|
| 1255 |
+
input_values: tf.Tensor,
|
| 1256 |
+
attention_mask: tf.Tensor | None = None,
|
| 1257 |
+
token_type_ids: tf.Tensor | None = None,
|
| 1258 |
+
position_ids: tf.Tensor | None = None,
|
| 1259 |
+
head_mask: tf.Tensor | None = None,
|
| 1260 |
+
inputs_embeds: tf.Tensor | None = None,
|
| 1261 |
+
output_attentions: tf.Tensor | None = None,
|
| 1262 |
+
output_hidden_states: tf.Tensor | None = None,
|
| 1263 |
+
return_dict: bool | None = None,
|
| 1264 |
+
training: bool = False,
|
| 1265 |
+
**kwargs: Any,
|
| 1266 |
+
):
|
| 1267 |
+
hidden_states = self.feature_extractor(tf.cast(input_values, tf.float32), training=training)
|
| 1268 |
+
|
| 1269 |
+
if attention_mask is not None:
|
| 1270 |
+
# compute real output lengths according to convolution formula
|
| 1271 |
+
output_lengths = self._get_feat_extract_output_lengths(tf.reduce_sum(attention_mask, -1))
|
| 1272 |
+
|
| 1273 |
+
attention_mask = tf.sequence_mask(
|
| 1274 |
+
output_lengths, maxlen=shape_list(hidden_states)[1], dtype=hidden_states.dtype
|
| 1275 |
+
)
|
| 1276 |
+
|
| 1277 |
+
hidden_states = self.feature_projection(hidden_states, training=training)
|
| 1278 |
+
|
| 1279 |
+
mask_time_indices = kwargs.get("mask_time_indices")
|
| 1280 |
+
if training:
|
| 1281 |
+
hidden_states = self._mask_hidden_states(hidden_states, mask_time_indices=mask_time_indices)
|
| 1282 |
+
|
| 1283 |
+
encoder_outputs = self.encoder(
|
| 1284 |
+
hidden_states,
|
| 1285 |
+
attention_mask=attention_mask,
|
| 1286 |
+
output_attentions=output_attentions,
|
| 1287 |
+
output_hidden_states=output_hidden_states,
|
| 1288 |
+
return_dict=return_dict,
|
| 1289 |
+
training=training,
|
| 1290 |
+
)
|
| 1291 |
+
hidden_states = encoder_outputs[0]
|
| 1292 |
+
|
| 1293 |
+
if not return_dict:
|
| 1294 |
+
return (hidden_states,) + encoder_outputs[1:]
|
| 1295 |
+
|
| 1296 |
+
return TFBaseModelOutput(
|
| 1297 |
+
last_hidden_state=hidden_states,
|
| 1298 |
+
hidden_states=encoder_outputs.hidden_states,
|
| 1299 |
+
attentions=encoder_outputs.attentions,
|
| 1300 |
+
)
|
| 1301 |
+
|
| 1302 |
+
|
| 1303 |
+
class TFHubertPreTrainedModel(TFPreTrainedModel):
|
| 1304 |
+
"""
|
| 1305 |
+
An abstract class to handle weights initialization and a simple interface for downloading and loading pretrained
|
| 1306 |
+
models.
|
| 1307 |
+
"""
|
| 1308 |
+
|
| 1309 |
+
config_class = HubertConfig
|
| 1310 |
+
base_model_prefix = "hubert"
|
| 1311 |
+
main_input_name = "input_values"
|
| 1312 |
+
|
| 1313 |
+
@property
|
| 1314 |
+
def input_signature(self):
|
| 1315 |
+
return {
|
| 1316 |
+
"input_values": tf.TensorSpec((None, 16000), tf.float32, name="input_values"),
|
| 1317 |
+
"attention_mask": tf.TensorSpec((None, None), tf.int32, name="attention_mask"),
|
| 1318 |
+
"token_type_ids": tf.TensorSpec((None, None), tf.int32, name="token_type_ids"),
|
| 1319 |
+
}
|
| 1320 |
+
|
| 1321 |
+
def __init__(self, config, *inputs, **kwargs):
|
| 1322 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1323 |
+
logger.warning(
|
| 1324 |
+
f"\n{self.__class__.__name__} has backpropagation operations that are NOT supported on CPU. If you wish "
|
| 1325 |
+
"to train/fine-tune this model, you need a GPU or a TPU"
|
| 1326 |
+
)
|
| 1327 |
+
|
| 1328 |
+
|
| 1329 |
+
HUBERT_START_DOCSTRING = r"""
|
| 1330 |
+
|
| 1331 |
+
This model inherits from [`TFPreTrainedModel`]. Check the superclass documentation for the generic methods the
|
| 1332 |
+
library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
|
| 1333 |
+
etc.)
|
| 1334 |
+
|
| 1335 |
+
This model is also a [keras.Model](https://www.tensorflow.org/api_docs/python/tf/keras/Model) subclass. Use it
|
| 1336 |
+
as a regular TF 2.0 Keras Model and refer to the TF 2.0 documentation for all matter related to general usage and
|
| 1337 |
+
behavior.
|
| 1338 |
+
|
| 1339 |
+
<Tip>
|
| 1340 |
+
|
| 1341 |
+
TensorFlow models and layers in `transformers` accept two formats as input:
|
| 1342 |
+
|
| 1343 |
+
- having all inputs as keyword arguments (like PyTorch models), or
|
| 1344 |
+
- having all inputs as a list, tuple or dict in the first positional argument.
|
| 1345 |
+
|
| 1346 |
+
The reason the second format is supported is that Keras methods prefer this format when passing inputs to models
|
| 1347 |
+
and layers. Because of this support, when using methods like `model.fit()` things should "just work" for you - just
|
| 1348 |
+
pass your inputs and labels in any format that `model.fit()` supports! If, however, you want to use the second
|
| 1349 |
+
format outside of Keras methods like `fit()` and `predict()`, such as when creating your own layers or models with
|
| 1350 |
+
the Keras `Functional` API, there are three possibilities you can use to gather all the input Tensors in the first
|
| 1351 |
+
positional argument:
|
| 1352 |
+
|
| 1353 |
+
- a single Tensor with `input_values` only and nothing else: `model(input_values)`
|
| 1354 |
+
- a list of varying length with one or several input Tensors IN THE ORDER given in the docstring:
|
| 1355 |
+
`model([input_values, attention_mask])` or `model([input_values, attention_mask, token_type_ids])`
|
| 1356 |
+
- a dictionary with one or several input Tensors associated to the input names given in the docstring:
|
| 1357 |
+
`model({"input_values": input_values, "token_type_ids": token_type_ids})`
|
| 1358 |
+
|
| 1359 |
+
Note that when creating models and layers with
|
| 1360 |
+
[subclassing](https://keras.io/guides/making_new_layers_and_models_via_subclassing/) then you don't need to worry
|
| 1361 |
+
about any of this, as you can just pass inputs like you would to any other Python function!
|
| 1362 |
+
|
| 1363 |
+
</Tip>
|
| 1364 |
+
|
| 1365 |
+
Args:
|
| 1366 |
+
config ([`HubertConfig`]): Model configuration class with all the parameters of the model.
|
| 1367 |
+
Initializing with a config file does not load the weights associated with the model, only the
|
| 1368 |
+
configuration. Check out the [`~PreTrainedModel.from_pretrained`] method to load the model weights.
|
| 1369 |
+
"""
|
| 1370 |
+
|
| 1371 |
+
HUBERT_INPUTS_DOCSTRING = r"""
|
| 1372 |
+
Args:
|
| 1373 |
+
input_values (`np.ndarray`, `tf.Tensor`, `list[tf.Tensor]` `dict[str, tf.Tensor]` or `dict[str, np.ndarray]` and each example must have the shape `({0})`):
|
| 1374 |
+
Indices of input sequence tokens in the vocabulary.
|
| 1375 |
+
|
| 1376 |
+
Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.__call__`] and
|
| 1377 |
+
[`PreTrainedTokenizer.encode`] for details.
|
| 1378 |
+
|
| 1379 |
+
[What are input IDs?](../glossary#input-ids)
|
| 1380 |
+
attention_mask (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1381 |
+
Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
|
| 1382 |
+
|
| 1383 |
+
- 1 for tokens that are **not masked**,
|
| 1384 |
+
- 0 for tokens that are **masked**.
|
| 1385 |
+
|
| 1386 |
+
[What are attention masks?](../glossary#attention-mask)
|
| 1387 |
+
token_type_ids (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1388 |
+
Segment token indices to indicate first and second portions of the inputs. Indices are selected in `[0,
|
| 1389 |
+
1]`:
|
| 1390 |
+
|
| 1391 |
+
- 0 corresponds to a *sentence A* token,
|
| 1392 |
+
- 1 corresponds to a *sentence B* token.
|
| 1393 |
+
|
| 1394 |
+
[What are token type IDs?](../glossary#token-type-ids)
|
| 1395 |
+
position_ids (`np.ndarray` or `tf.Tensor` of shape `({0})`, *optional*):
|
| 1396 |
+
Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
|
| 1397 |
+
config.max_position_embeddings - 1]`.
|
| 1398 |
+
|
| 1399 |
+
[What are position IDs?](../glossary#position-ids)
|
| 1400 |
+
head_mask (`np.ndarray` or `tf.Tensor` of shape `(num_heads,)` or `(num_layers, num_heads)`, *optional*):
|
| 1401 |
+
Mask to nullify selected heads of the self-attention modules. Mask values selected in `[0, 1]`:
|
| 1402 |
+
|
| 1403 |
+
- 1 indicates the head is **not masked**,
|
| 1404 |
+
- 0 indicates the head is **masked**.
|
| 1405 |
+
|
| 1406 |
+
inputs_embeds (`np.ndarray` or `tf.Tensor` of shape `({0}, hidden_size)`, *optional*):
|
| 1407 |
+
Optionally, instead of passing `input_values` you can choose to directly pass an embedded representation.
|
| 1408 |
+
This is useful if you want more control over how to convert `input_values` indices into associated vectors
|
| 1409 |
+
than the model's internal embedding lookup matrix.
|
| 1410 |
+
output_attentions (`bool`, *optional*):
|
| 1411 |
+
Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
|
| 1412 |
+
tensors for more detail. This argument can be used only in eager mode, in graph mode the value in the
|
| 1413 |
+
config will be used instead.
|
| 1414 |
+
output_hidden_states (`bool`, *optional*):
|
| 1415 |
+
Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
|
| 1416 |
+
more detail. This argument can be used only in eager mode, in graph mode the value in the config will be
|
| 1417 |
+
used instead.
|
| 1418 |
+
return_dict (`bool`, *optional*):
|
| 1419 |
+
Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple. This argument can be used in
|
| 1420 |
+
eager mode, in graph mode the value will always be set to True.
|
| 1421 |
+
training (`bool`, *optional*, defaults to `False``):
|
| 1422 |
+
Whether or not to use the model in training mode (some modules like dropout modules have different
|
| 1423 |
+
behaviors between training and evaluation).
|
| 1424 |
+
"""
|
| 1425 |
+
|
| 1426 |
+
|
| 1427 |
+
@add_start_docstrings(
|
| 1428 |
+
"The bare TFHubert Model transformer outputting raw hidden-states without any specific head on top.",
|
| 1429 |
+
HUBERT_START_DOCSTRING,
|
| 1430 |
+
)
|
| 1431 |
+
class TFHubertModel(TFHubertPreTrainedModel):
|
| 1432 |
+
def __init__(self, config: HubertConfig, *inputs, **kwargs):
|
| 1433 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1434 |
+
self.config = config
|
| 1435 |
+
self.hubert = TFHubertMainLayer(config, name="hubert")
|
| 1436 |
+
|
| 1437 |
+
@add_start_docstrings_to_model_forward(HUBERT_INPUTS_DOCSTRING)
|
| 1438 |
+
@replace_return_docstrings(output_type=TFBaseModelOutput, config_class=_CONFIG_FOR_DOC)
|
| 1439 |
+
@unpack_inputs
|
| 1440 |
+
def call(
|
| 1441 |
+
self,
|
| 1442 |
+
input_values: tf.Tensor,
|
| 1443 |
+
attention_mask: tf.Tensor | None = None,
|
| 1444 |
+
token_type_ids: tf.Tensor | None = None,
|
| 1445 |
+
position_ids: tf.Tensor | None = None,
|
| 1446 |
+
head_mask: tf.Tensor | None = None,
|
| 1447 |
+
inputs_embeds: tf.Tensor | None = None,
|
| 1448 |
+
output_attentions: bool | None = None,
|
| 1449 |
+
output_hidden_states: bool | None = None,
|
| 1450 |
+
return_dict: bool | None = None,
|
| 1451 |
+
training: bool = False,
|
| 1452 |
+
) -> TFBaseModelOutput | tuple[tf.Tensor]:
|
| 1453 |
+
"""
|
| 1454 |
+
|
| 1455 |
+
Returns:
|
| 1456 |
+
|
| 1457 |
+
Example:
|
| 1458 |
+
|
| 1459 |
+
```python
|
| 1460 |
+
>>> from transformers import AutoProcessor, TFHubertModel
|
| 1461 |
+
>>> from datasets import load_dataset
|
| 1462 |
+
|
| 1463 |
+
>>> processor = AutoProcessor.from_pretrained("facebook/hubert-large-ls960-ft")
|
| 1464 |
+
>>> model = TFHubertModel.from_pretrained("facebook/hubert-large-ls960-ft")
|
| 1465 |
+
|
| 1466 |
+
|
| 1467 |
+
>>> def map_to_array(example):
|
| 1468 |
+
... example["speech"] = example["audio"]["array"]
|
| 1469 |
+
... return example
|
| 1470 |
+
|
| 1471 |
+
|
| 1472 |
+
>>> ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation")
|
| 1473 |
+
>>> ds = ds.map(map_to_array)
|
| 1474 |
+
|
| 1475 |
+
>>> input_values = processor(ds["speech"][0], return_tensors="tf").input_values # Batch size 1
|
| 1476 |
+
>>> hidden_states = model(input_values).last_hidden_state
|
| 1477 |
+
```"""
|
| 1478 |
+
|
| 1479 |
+
output_hidden_states = output_hidden_states if output_hidden_states else self.config.output_hidden_states
|
| 1480 |
+
output_attentions = output_attentions if output_attentions else self.config.output_attentions
|
| 1481 |
+
return_dict = return_dict if return_dict else self.config.return_dict
|
| 1482 |
+
|
| 1483 |
+
outputs = self.hubert(
|
| 1484 |
+
input_values=input_values,
|
| 1485 |
+
attention_mask=attention_mask,
|
| 1486 |
+
token_type_ids=token_type_ids,
|
| 1487 |
+
position_ids=position_ids,
|
| 1488 |
+
head_mask=head_mask,
|
| 1489 |
+
inputs_embeds=inputs_embeds,
|
| 1490 |
+
output_attentions=output_attentions,
|
| 1491 |
+
output_hidden_states=output_hidden_states,
|
| 1492 |
+
return_dict=return_dict,
|
| 1493 |
+
training=training,
|
| 1494 |
+
)
|
| 1495 |
+
|
| 1496 |
+
return outputs
|
| 1497 |
+
|
| 1498 |
+
def build(self, input_shape=None):
|
| 1499 |
+
if self.built:
|
| 1500 |
+
return
|
| 1501 |
+
self.built = True
|
| 1502 |
+
if getattr(self, "hubert", None) is not None:
|
| 1503 |
+
with tf.name_scope(self.hubert.name):
|
| 1504 |
+
self.hubert.build(None)
|
| 1505 |
+
|
| 1506 |
+
|
| 1507 |
+
@add_start_docstrings(
|
| 1508 |
+
"""TFHubert Model with a `language modeling` head on top for Connectionist Temporal Classification (CTC).""",
|
| 1509 |
+
HUBERT_START_DOCSTRING,
|
| 1510 |
+
)
|
| 1511 |
+
class TFHubertForCTC(TFHubertPreTrainedModel):
|
| 1512 |
+
def __init__(self, config: HubertConfig, *inputs, **kwargs):
|
| 1513 |
+
super().__init__(config, *inputs, **kwargs)
|
| 1514 |
+
|
| 1515 |
+
self.hubert = TFHubertMainLayer(config, name="hubert")
|
| 1516 |
+
self.dropout = keras.layers.Dropout(config.final_dropout)
|
| 1517 |
+
self.lm_head = keras.layers.Dense(config.vocab_size, name="lm_head")
|
| 1518 |
+
self.output_hidden_size = (
|
| 1519 |
+
config.output_hidden_size if hasattr(config, "add_adapter") and config.add_adapter else config.hidden_size
|
| 1520 |
+
)
|
| 1521 |
+
|
| 1522 |
+
def freeze_feature_extractor(self):
|
| 1523 |
+
"""
|
| 1524 |
+
Calling this function will disable the gradient computation for the feature encoder so that its parameters will
|
| 1525 |
+
not be updated during training.
|
| 1526 |
+
"""
|
| 1527 |
+
warnings.warn(
|
| 1528 |
+
"The method `freeze_feature_extractor` is deprecated and will be removed in Transformers v5. "
|
| 1529 |
+
"Please use the equivalent `freeze_feature_encoder` method instead.",
|
| 1530 |
+
FutureWarning,
|
| 1531 |
+
)
|
| 1532 |
+
self.freeze_feature_encoder()
|
| 1533 |
+
|
| 1534 |
+
def freeze_feature_encoder(self):
|
| 1535 |
+
"""
|
| 1536 |
+
Calling this function will disable the gradient computation for the feature encoder so that its parameter will
|
| 1537 |
+
not be updated during training.
|
| 1538 |
+
"""
|
| 1539 |
+
self.hubert.feature_extractor.trainable = False
|
| 1540 |
+
|
| 1541 |
+
@add_start_docstrings_to_model_forward(HUBERT_INPUTS_DOCSTRING)
|
| 1542 |
+
@replace_return_docstrings(output_type=TFCausalLMOutput, config_class=_CONFIG_FOR_DOC)
|
| 1543 |
+
@unpack_inputs
|
| 1544 |
+
def call(
|
| 1545 |
+
self,
|
| 1546 |
+
input_values: tf.Tensor,
|
| 1547 |
+
attention_mask: tf.Tensor | None = None,
|
| 1548 |
+
token_type_ids: tf.Tensor | None = None,
|
| 1549 |
+
position_ids: tf.Tensor | None = None,
|
| 1550 |
+
head_mask: tf.Tensor | None = None,
|
| 1551 |
+
inputs_embeds: tf.Tensor | None = None,
|
| 1552 |
+
output_attentions: bool | None = None,
|
| 1553 |
+
labels: tf.Tensor | None = None,
|
| 1554 |
+
output_hidden_states: bool | None = None,
|
| 1555 |
+
return_dict: bool | None = None,
|
| 1556 |
+
training: bool | None = False,
|
| 1557 |
+
) -> TFCausalLMOutput | tuple[tf.Tensor]:
|
| 1558 |
+
r"""
|
| 1559 |
+
labels (`tf.Tensor` or `np.ndarray` of shape `(batch_size, sequence_length)`, *optional*):
|
| 1560 |
+
Labels for computing the masked language modeling loss. Indices should be in `[-100, 0, ...,
|
| 1561 |
+
config.vocab_size]` (see `input_values` docstring) Tokens with indices set to `-100` are ignored (masked),
|
| 1562 |
+
the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`
|
| 1563 |
+
|
| 1564 |
+
Returns:
|
| 1565 |
+
|
| 1566 |
+
Example:
|
| 1567 |
+
|
| 1568 |
+
```python
|
| 1569 |
+
>>> import tensorflow as tf
|
| 1570 |
+
>>> from transformers import AutoProcessor, TFHubertForCTC
|
| 1571 |
+
>>> from datasets import load_dataset
|
| 1572 |
+
|
| 1573 |
+
>>> processor = AutoProcessor.from_pretrained("facebook/hubert-large-ls960-ft")
|
| 1574 |
+
>>> model = TFHubertForCTC.from_pretrained("facebook/hubert-large-ls960-ft")
|
| 1575 |
+
|
| 1576 |
+
|
| 1577 |
+
>>> def map_to_array(example):
|
| 1578 |
+
... example["speech"] = example["audio"]["array"]
|
| 1579 |
+
... return example
|
| 1580 |
+
|
| 1581 |
+
|
| 1582 |
+
>>> ds = load_dataset("hf-internal-testing/librispeech_asr_dummy", "clean", split="validation")
|
| 1583 |
+
>>> ds = ds.map(map_to_array)
|
| 1584 |
+
|
| 1585 |
+
>>> input_values = processor(ds["speech"][0], return_tensors="tf").input_values # Batch size 1
|
| 1586 |
+
>>> logits = model(input_values).logits
|
| 1587 |
+
>>> predicted_ids = tf.argmax(logits, axis=-1)
|
| 1588 |
+
|
| 1589 |
+
>>> transcription = processor.decode(predicted_ids[0])
|
| 1590 |
+
|
| 1591 |
+
>>> # compute loss
|
| 1592 |
+
>>> target_transcription = "A MAN SAID TO THE UNIVERSE SIR I EXIST"
|
| 1593 |
+
|
| 1594 |
+
>>> # Pass the transcription as text to encode labels
|
| 1595 |
+
>>> labels = processor(text=transcription, return_tensors="tf").input_values
|
| 1596 |
+
|
| 1597 |
+
>>> loss = model(input_values, labels=labels).loss
|
| 1598 |
+
```"""
|
| 1599 |
+
if labels is not None and tf.reduce_max(labels) >= self.config.vocab_size:
|
| 1600 |
+
raise ValueError(f"Label values must be <= vocab_size: {self.config.vocab_size}")
|
| 1601 |
+
|
| 1602 |
+
outputs = self.hubert(
|
| 1603 |
+
input_values=input_values,
|
| 1604 |
+
attention_mask=attention_mask,
|
| 1605 |
+
token_type_ids=token_type_ids,
|
| 1606 |
+
position_ids=position_ids,
|
| 1607 |
+
head_mask=head_mask,
|
| 1608 |
+
inputs_embeds=inputs_embeds,
|
| 1609 |
+
output_attentions=output_attentions,
|
| 1610 |
+
output_hidden_states=output_hidden_states,
|
| 1611 |
+
return_dict=return_dict,
|
| 1612 |
+
training=training,
|
| 1613 |
+
)
|
| 1614 |
+
hidden_states = outputs[0]
|
| 1615 |
+
hidden_states = self.dropout(hidden_states, training=training)
|
| 1616 |
+
|
| 1617 |
+
logits = self.lm_head(hidden_states)
|
| 1618 |
+
|
| 1619 |
+
if labels is not None:
|
| 1620 |
+
attention_mask = (
|
| 1621 |
+
attention_mask if attention_mask is not None else tf.ones_like(input_values, dtype=tf.float32)
|
| 1622 |
+
)
|
| 1623 |
+
input_lengths = self.hubert._get_feat_extract_output_lengths(tf.reduce_sum(attention_mask, axis=-1))
|
| 1624 |
+
|
| 1625 |
+
# assuming that padded tokens are filled with -100
|
| 1626 |
+
# when not being attended to
|
| 1627 |
+
labels_mask = tf.cast(labels >= 0, tf.int32)
|
| 1628 |
+
target_lengths = tf.reduce_sum(labels_mask, axis=-1)
|
| 1629 |
+
|
| 1630 |
+
loss = tf.nn.ctc_loss(
|
| 1631 |
+
logits=logits,
|
| 1632 |
+
labels=labels,
|
| 1633 |
+
logit_length=input_lengths,
|
| 1634 |
+
label_length=target_lengths,
|
| 1635 |
+
blank_index=self.config.pad_token_id,
|
| 1636 |
+
logits_time_major=False,
|
| 1637 |
+
)
|
| 1638 |
+
|
| 1639 |
+
if self.config.ctc_loss_reduction == "sum":
|
| 1640 |
+
loss = tf.reduce_sum(loss)
|
| 1641 |
+
loss = tf.reshape(loss, (1,))
|
| 1642 |
+
if self.config.ctc_loss_reduction == "mean":
|
| 1643 |
+
loss = tf.reduce_mean(loss)
|
| 1644 |
+
loss = tf.reshape(loss, (1,))
|
| 1645 |
+
else:
|
| 1646 |
+
loss = None
|
| 1647 |
+
|
| 1648 |
+
if not return_dict:
|
| 1649 |
+
output = (logits,) + outputs[1:]
|
| 1650 |
+
return ((loss,) + output) if loss is not None else output
|
| 1651 |
+
|
| 1652 |
+
return TFCausalLMOutput(
|
| 1653 |
+
loss=loss,
|
| 1654 |
+
logits=logits,
|
| 1655 |
+
hidden_states=outputs.hidden_states,
|
| 1656 |
+
attentions=outputs.attentions,
|
| 1657 |
+
)
|
| 1658 |
+
|
| 1659 |
+
def build(self, input_shape=None):
|
| 1660 |
+
if self.built:
|
| 1661 |
+
return
|
| 1662 |
+
self.built = True
|
| 1663 |
+
if getattr(self, "hubert", None) is not None:
|
| 1664 |
+
with tf.name_scope(self.hubert.name):
|
| 1665 |
+
self.hubert.build(None)
|
| 1666 |
+
if getattr(self, "lm_head", None) is not None:
|
| 1667 |
+
with tf.name_scope(self.lm_head.name):
|
| 1668 |
+
self.lm_head.build([None, None, self.output_hidden_size])
|
| 1669 |
+
|
| 1670 |
+
|
| 1671 |
+
__all__ = ["TFHubertForCTC", "TFHubertModel", "TFHubertPreTrainedModel"]
|