mirror of
https://github.com/k2-fsa/icefall.git
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367 lines
13 KiB
Python
367 lines
13 KiB
Python
# Copyright 2021 Piotr Żelasko
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# Copyright 2021 Xiaomi Corporation (Author: Mingshuang Luo)
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#
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# See ../../../../LICENSE for clarification regarding multiple authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import argparse
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import logging
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from functools import lru_cache
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from pathlib import Path
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from typing import Any, Dict, Optional
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from lhotse import CutSet, Fbank, FbankConfig, load_manifest, load_manifest_lazy
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from lhotse.dataset import (
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CutConcatenate,
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CutMix,
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DynamicBucketingSampler,
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K2SpeechRecognitionDataset,
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SimpleCutSampler,
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SpecAugment,
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)
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from lhotse.dataset.input_strategies import OnTheFlyFeatures
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from torch.utils.data import DataLoader
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from icefall.utils import str2bool
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class TedLiumAsrDataModule:
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"""
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DataModule for k2 ASR experiments.
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It assumes there is always one train and valid dataloader,
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but there can be multiple test dataloaders (e.g. TEDLium3 dev
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and test).
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It contains all the common data pipeline modules used in ASR
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experiments, e.g.:
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- dynamic batch size,
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- bucketing samplers,
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- cut concatenation,
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- augmentation,
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- on-the-fly feature extraction
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This class should be derived for specific corpora used in ASR tasks.
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"""
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def __init__(self, args: argparse.Namespace):
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self.args = args
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@classmethod
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def add_arguments(cls, parser: argparse.ArgumentParser):
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group = parser.add_argument_group(
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title="ASR data related options",
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description="These options are used for the preparation of "
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"PyTorch DataLoaders from Lhotse CutSet's -- they control the "
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"effective batch sizes, sampling strategies, applied data "
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"augmentations, etc.",
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)
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group.add_argument(
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"--manifest-dir",
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type=Path,
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default=Path("data/fbank"),
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help="Path to directory with train/valid/test cuts.",
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)
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group.add_argument(
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"--max-duration",
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type=int,
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default=200.0,
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help="Maximum pooled recordings duration (seconds) in a "
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"single batch. You can reduce it if it causes CUDA OOM.",
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)
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group.add_argument(
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"--bucketing-sampler",
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type=str2bool,
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default=True,
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help="When enabled, the batches will come from buckets of "
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"similar duration (saves padding frames).",
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)
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group.add_argument(
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"--num-buckets",
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type=int,
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default=30,
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help="The number of buckets for the DynamicBucketingSampler"
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"(you might want to increase it for larger datasets).",
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)
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group.add_argument(
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"--concatenate-cuts",
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type=str2bool,
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default=False,
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help="When enabled, utterances (cuts) will be concatenated "
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"to minimize the amount of padding.",
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)
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group.add_argument(
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"--duration-factor",
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type=float,
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default=1.0,
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help="Determines the maximum duration of a concatenated cut "
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"relative to the duration of the longest cut in a batch.",
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)
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group.add_argument(
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"--gap",
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type=float,
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default=1.0,
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help="The amount of padding (in seconds) inserted between "
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"concatenated cuts. This padding is filled with noise when "
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"noise augmentation is used.",
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)
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group.add_argument(
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"--on-the-fly-feats",
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type=str2bool,
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default=False,
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help="When enabled, use on-the-fly cut mixing and feature "
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"extraction. Will drop existing precomputed feature manifests "
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"if available.",
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)
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group.add_argument(
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"--shuffle",
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type=str2bool,
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default=True,
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help="When enabled (=default), the examples will be "
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"shuffled for each epoch.",
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)
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group.add_argument(
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"--return-cuts",
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type=str2bool,
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default=True,
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help="When enabled, each batch will have the "
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"field: batch['supervisions']['cut'] with the cuts that "
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"were used to construct it.",
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)
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group.add_argument(
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"--num-workers",
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type=int,
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default=2,
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help="The number of training dataloader workers that "
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"collect the batches.",
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)
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group.add_argument(
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"--enable-spec-aug",
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type=str2bool,
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default=True,
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help="When enabled, use SpecAugment for training dataset.",
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)
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group.add_argument(
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"--spec-aug-time-warp-factor",
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type=int,
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default=80,
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help="Used only when --enable-spec-aug is True. "
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"It specifies the factor for time warping in SpecAugment. "
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"Larger values mean more warping. "
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"A value less than 1 means to disable time warp.",
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)
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group.add_argument(
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"--enable-musan",
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type=str2bool,
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default=True,
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help="When enabled, select noise from MUSAN and mix it"
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"with training dataset.",
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)
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def train_dataloaders(
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self, cuts_train: CutSet, sampler_state_dict: Optional[Dict[str, Any]] = None
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) -> DataLoader:
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"""
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Args:
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cuts_train:
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CutSet for training.
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sampler_state_dict:
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The state dict for the training sampler.
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"""
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input_transforms = []
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if self.args.enable_spec_aug:
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logging.info("Enable SpecAugment")
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logging.info(f"Time warp factor: {self.args.spec_aug_time_warp_factor}")
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input_transforms.append(
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SpecAugment(
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time_warp_factor=self.args.spec_aug_time_warp_factor,
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num_frame_masks=10,
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features_mask_size=27,
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num_feature_masks=2,
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frames_mask_size=100,
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max_frames_mask_fraction=0.15,
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p=0.9,
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)
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)
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else:
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logging.info("Disable SpecAugment")
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logging.info("About to get Musan cuts")
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transforms = []
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if self.args.enable_musan:
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logging.info("Enable MUSAN")
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cuts_musan = load_manifest(self.args.manifest_dir / "musan_cuts.jsonl.gz")
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transforms.append(
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CutMix(cuts=cuts_musan, prob=0.5, snr=(10, 20), preserve_id=True)
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)
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else:
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logging.info("Disable MUSAN")
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if self.args.concatenate_cuts:
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logging.info(
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f"Using cut concatenation with duration factor "
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f"{self.args.duration_factor} and gap {self.args.gap}."
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)
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# Cut concatenation should be the first transform in the list,
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# so that if we e.g. mix noise in, it will fill the gaps between
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# different utterances.
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transforms = [
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CutConcatenate(
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duration_factor=self.args.duration_factor, gap=self.args.gap
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)
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] + transforms
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logging.info("About to create train dataset")
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if self.args.on_the_fly_feats:
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# NOTE: the PerturbSpeed transform should be added only if we
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# remove it from data prep stage.
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# Add on-the-fly speed perturbation; since originally it would
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# have increased epoch size by 3, we will apply prob 2/3 and use
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# 3x more epochs.
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# Speed perturbation probably should come first before
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# concatenation, but in principle the transforms order doesn't have
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# to be strict (e.g. could be randomized)
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# transforms = [PerturbSpeed(factors=[0.9, 1.1], p=2/3)] + transforms # noqa
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# Drop feats to be on the safe side.
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train = K2SpeechRecognitionDataset(
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cut_transforms=transforms,
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input_strategy=OnTheFlyFeatures(Fbank(FbankConfig(num_mel_bins=80))),
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input_transforms=input_transforms,
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return_cuts=self.args.return_cuts,
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)
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else:
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train = K2SpeechRecognitionDataset(
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cut_transforms=transforms,
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input_transforms=input_transforms,
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return_cuts=self.args.return_cuts,
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)
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if self.args.bucketing_sampler:
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logging.info("Using DynamicBucketingSampler.")
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train_sampler = DynamicBucketingSampler(
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cuts_train,
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max_duration=self.args.max_duration,
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shuffle=self.args.shuffle,
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num_buckets=self.args.num_buckets,
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drop_last=True,
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)
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else:
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logging.info("Using SimpleCutSampler.")
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train_sampler = SimpleCutSampler(
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cuts_train,
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max_duration=self.args.max_duration,
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shuffle=self.args.shuffle,
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)
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if sampler_state_dict is not None:
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logging.info("Loading sampler state dict")
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train_sampler.load_state_dict(sampler_state_dict)
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logging.info("About to create train dataloader")
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train_dl = DataLoader(
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train,
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sampler=train_sampler,
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batch_size=None,
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num_workers=self.args.num_workers,
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persistent_workers=False,
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)
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return train_dl
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def valid_dataloaders(self, cuts_valid: CutSet) -> DataLoader:
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transforms = []
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if self.args.concatenate_cuts:
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transforms = [
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CutConcatenate(
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duration_factor=self.args.duration_factor, gap=self.args.gap
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)
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] + transforms
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logging.info("About to create dev dataset")
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if self.args.on_the_fly_feats:
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validate = K2SpeechRecognitionDataset(
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cut_transforms=transforms,
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input_strategy=OnTheFlyFeatures(Fbank(FbankConfig(num_mel_bins=80))),
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return_cuts=self.args.return_cuts,
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)
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else:
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validate = K2SpeechRecognitionDataset(
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cut_transforms=transforms,
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return_cuts=self.args.return_cuts,
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)
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valid_sampler = DynamicBucketingSampler(
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cuts_valid,
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max_duration=self.args.max_duration,
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shuffle=False,
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)
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logging.info("About to create dev dataloader")
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valid_dl = DataLoader(
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validate,
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sampler=valid_sampler,
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batch_size=None,
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num_workers=2,
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persistent_workers=False,
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)
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return valid_dl
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def test_dataloaders(self, cuts_test: CutSet) -> DataLoader:
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logging.debug("About to create test dataset")
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if self.args.on_the_fly_feats:
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test = K2SpeechRecognitionDataset(
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input_strategy=OnTheFlyFeatures(Fbank(FbankConfig(num_mel_bins=80))),
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return_cuts=self.args.return_cuts,
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)
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else:
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test = K2SpeechRecognitionDataset(
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return_cuts=self.args.return_cuts,
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)
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test_sampler = DynamicBucketingSampler(
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cuts_test,
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max_duration=self.args.max_duration,
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shuffle=False,
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)
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logging.debug("About to create test dataloader")
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test_dl = DataLoader(
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test,
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batch_size=None,
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sampler=test_sampler,
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num_workers=self.args.num_workers,
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persistent_workers=False,
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)
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return test_dl
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@lru_cache()
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def train_cuts(self) -> CutSet:
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logging.info("About to get train cuts")
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return load_manifest_lazy(
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self.args.manifest_dir / "tedlium_cuts_train.jsonl.gz"
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)
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@lru_cache()
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def dev_cuts(self) -> CutSet:
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logging.info("About to get dev cuts")
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return load_manifest_lazy(self.args.manifest_dir / "tedlium_cuts_dev.jsonl.gz")
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@lru_cache()
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def test_cuts(self) -> CutSet:
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logging.info("About to get test cuts")
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return load_manifest_lazy(self.args.manifest_dir / "tedlium_cuts_test.jsonl.gz")
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