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| # Copyright (c) 2021 Mobvoi Inc. (authors: Binbin Zhang) | |
| # 2024 Alibaba Inc (authors: Xiang Lyu) | |
| # | |
| # Licensed under the Apache License, Version 2.0 (the "License"); | |
| # you may not use this file except in compliance with the License. | |
| # You may obtain a copy of the License at | |
| # | |
| # http://www.apache.org/licenses/LICENSE-2.0 | |
| # | |
| # Unless required by applicable law or agreed to in writing, software | |
| # distributed under the License is distributed on an "AS IS" BASIS, | |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| # See the License for the specific language governing permissions and | |
| # limitations under the License. | |
| import random | |
| import json | |
| import math | |
| from functools import partial | |
| import torch | |
| import torch.distributed as dist | |
| from torch.utils.data import IterableDataset | |
| from cosyvoice.utils.file_utils import read_lists, read_json_lists | |
| class Processor(IterableDataset): | |
| def __init__(self, source, f, *args, **kw): | |
| assert callable(f) | |
| self.source = source | |
| self.f = f | |
| self.args = args | |
| self.kw = kw | |
| def set_epoch(self, epoch): | |
| self.source.set_epoch(epoch) | |
| def __iter__(self): | |
| """ Return an iterator over the source dataset processed by the | |
| given processor. | |
| """ | |
| assert self.source is not None | |
| assert callable(self.f) | |
| return self.f(iter(self.source), *self.args, **self.kw) | |
| def apply(self, f): | |
| assert callable(f) | |
| return Processor(self, f, *self.args, **self.kw) | |
| class DistributedSampler: | |
| def __init__(self, shuffle=True, partition=True): | |
| self.epoch = -1 | |
| self.update() | |
| self.shuffle = shuffle | |
| self.partition = partition | |
| def update(self): | |
| assert dist.is_available() | |
| if dist.is_initialized(): | |
| self.rank = dist.get_rank() | |
| self.world_size = dist.get_world_size() | |
| else: | |
| self.rank = 0 | |
| self.world_size = 1 | |
| worker_info = torch.utils.data.get_worker_info() | |
| if worker_info is None: | |
| self.worker_id = 0 | |
| self.num_workers = 1 | |
| else: | |
| self.worker_id = worker_info.id | |
| self.num_workers = worker_info.num_workers | |
| return dict(rank=self.rank, | |
| world_size=self.world_size, | |
| worker_id=self.worker_id, | |
| num_workers=self.num_workers) | |
| def set_epoch(self, epoch): | |
| self.epoch = epoch | |
| def sample(self, data): | |
| """ Sample data according to rank/world_size/num_workers | |
| Args: | |
| data(List): input data list | |
| Returns: | |
| List: data list after sample | |
| """ | |
| data = list(range(len(data))) | |
| # force datalist even | |
| if self.partition: | |
| if self.shuffle: | |
| random.Random(self.epoch).shuffle(data) | |
| if len(data) < self.world_size: | |
| data = data * math.ceil(self.world_size / len(data)) | |
| data = data[:self.world_size] | |
| data = data[self.rank::self.world_size] | |
| if len(data) < self.num_workers: | |
| data = data * math.ceil(self.num_workers / len(data)) | |
| data = data[:self.num_workers] | |
| data = data[self.worker_id::self.num_workers] | |
| return data | |
| class DataList(IterableDataset): | |
| def __init__(self, lists, shuffle=True, partition=True): | |
| self.lists = lists | |
| self.sampler = DistributedSampler(shuffle, partition) | |
| def set_epoch(self, epoch): | |
| self.sampler.set_epoch(epoch) | |
| def __iter__(self): | |
| sampler_info = self.sampler.update() | |
| indexes = self.sampler.sample(self.lists) | |
| for index in indexes: | |
| data = dict(src=self.lists[index]) | |
| data.update(sampler_info) | |
| yield data | |
| def Dataset(data_list_file, | |
| data_pipeline, | |
| mode='train', | |
| shuffle=True, | |
| partition=True, | |
| tts_file='', | |
| prompt_utt2data=''): | |
| """ Construct dataset from arguments | |
| We have two shuffle stage in the Dataset. The first is global | |
| shuffle at shards tar/raw file level. The second is global shuffle | |
| at training samples level. | |
| Args: | |
| data_type(str): raw/shard | |
| tokenizer (BaseTokenizer): tokenizer to tokenize | |
| partition(bool): whether to do data partition in terms of rank | |
| """ | |
| assert mode in ['train', 'inference'] | |
| lists = read_lists(data_list_file) | |
| if mode == 'inference': | |
| with open(tts_file) as f: | |
| tts_data = json.load(f) | |
| utt2lists = read_json_lists(prompt_utt2data) | |
| # filter unnecessary file in inference mode | |
| lists = list(set([utt2lists[utt] for utt in tts_data.keys() if utt2lists[utt] in lists])) | |
| dataset = DataList(lists, | |
| shuffle=shuffle, | |
| partition=partition) | |
| if mode == 'inference': | |
| # map partial arg tts_data in inference mode | |
| data_pipeline[0] = partial(data_pipeline[0], tts_data=tts_data) | |
| for func in data_pipeline: | |
| dataset = Processor(dataset, func, mode=mode) | |
| return dataset | |