import logging
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import os
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import shutil
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from multiprocessing import Pool
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import numpy as np
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import torch.distributed as dist
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import torchaudio
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def filter_wav_text(data_dir, dataset):
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wav_file = os.path.join(data_dir, dataset, "wav.scp")
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text_file = os.path.join(data_dir, dataset, "text")
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with open(wav_file) as f_wav, open(text_file) as f_text:
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wav_lines = f_wav.readlines()
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text_lines = f_text.readlines()
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os.rename(wav_file, "{}.bak".format(wav_file))
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os.rename(text_file, "{}.bak".format(text_file))
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wav_dict = {}
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for line in wav_lines:
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parts = line.strip().split()
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if len(parts) < 2:
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continue
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wav_dict[parts[0]] = parts[1]
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text_dict = {}
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for line in text_lines:
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parts = line.strip().split()
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if len(parts) < 2:
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continue
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text_dict[parts[0]] = " ".join(parts[1:])
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filter_count = 0
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with open(wav_file, "w") as f_wav, open(text_file, "w") as f_text:
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for sample_name, wav_path in wav_dict.items():
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if sample_name in text_dict.keys():
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f_wav.write(sample_name + " " + wav_path + "\n")
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f_text.write(sample_name + " " + text_dict[sample_name] + "\n")
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else:
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filter_count += 1
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logging.info("{}/{} samples in {} are filtered because of the mismatch between wav.scp and text".
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format(filter_count, len(wav_lines), dataset))
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def wav2num_frame(wav_path, frontend_conf):
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waveform, sampling_rate = torchaudio.load(wav_path)
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n_frames = (waveform.shape[1] * 1000.0) / (sampling_rate * frontend_conf["frame_shift"] * frontend_conf["lfr_n"])
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feature_dim = frontend_conf["n_mels"] * frontend_conf["lfr_m"]
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return n_frames, feature_dim
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def calc_shape_core(root_path, args, idx):
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wav_scp_file = os.path.join(root_path, "wav.scp.{}".format(idx))
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shape_file = os.path.join(root_path, "speech_shape.{}".format(idx))
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with open(wav_scp_file) as f:
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lines = f.readlines()
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frontend_conf = args.frontend_conf
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dataset_conf = args.dataset_conf
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speech_length_min = dataset_conf.speech_length_min if hasattr(dataset_conf, "speech_length_min") else -1
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speech_length_max = dataset_conf.speech_length_max if hasattr(dataset_conf, "speech_length_max") else -1
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with open(shape_file, "w") as f:
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for line in lines:
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sample_name, wav_path = line.strip().split()
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n_frames, feature_dim = wav2num_frame(wav_path, frontend_conf)
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write_flag = True
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if n_frames > 0 and speech_length_min > 0:
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write_flag = n_frames >= speech_length_min
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if n_frames > 0 and speech_length_max > 0:
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write_flag = n_frames <= speech_length_max
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if write_flag:
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f.write("{} {},{}\n".format(sample_name, str(int(np.ceil(n_frames))), str(int(feature_dim))))
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f.flush()
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def calc_shape(args, dataset, nj=64):
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shape_path = os.path.join(args.data_dir, dataset, "speech_shape")
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if os.path.exists(shape_path):
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logging.info('Shape file for small dataset already exists.')
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return
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split_shape_path = os.path.join(args.data_dir, dataset, "shape_files")
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if os.path.exists(split_shape_path):
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shutil.rmtree(split_shape_path)
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os.mkdir(split_shape_path)
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# split
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wav_scp_file = os.path.join(args.data_dir, dataset, "wav.scp")
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with open(wav_scp_file) as f:
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lines = f.readlines()
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num_lines = len(lines)
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num_job_lines = num_lines // nj
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start = 0
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for i in range(nj):
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end = start + num_job_lines
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file = os.path.join(split_shape_path, "wav.scp.{}".format(str(i + 1)))
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with open(file, "w") as f:
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if i == nj - 1:
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f.writelines(lines[start:])
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else:
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f.writelines(lines[start:end])
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start = end
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p = Pool(nj)
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for i in range(nj):
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p.apply_async(calc_shape_core, args=(split_shape_path, args, str(i + 1)))
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logging.info("Generating shape files, please wait a few minutes...")
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p.close()
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p.join()
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# combine
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with open(shape_path, "w") as f:
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for i in range(nj):
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job_file = os.path.join(split_shape_path, "speech_shape.{}".format(str(i + 1)))
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with open(job_file) as job_f:
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lines = job_f.readlines()
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f.writelines(lines)
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logging.info('Generating shape files done.')
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def generate_data_list(data_dir, dataset, nj=64):
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list_file = os.path.join(data_dir, dataset, "data.list")
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if os.path.exists(list_file):
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logging.info('Data list for large dataset already exists.')
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return
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split_path = os.path.join(data_dir, dataset, "split")
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if os.path.exists(split_path):
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shutil.rmtree(split_path)
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os.mkdir(split_path)
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with open(os.path.join(data_dir, dataset, "wav.scp")) as f_wav:
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wav_lines = f_wav.readlines()
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with open(os.path.join(data_dir, dataset, "text")) as f_text:
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text_lines = f_text.readlines()
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num_lines = len(wav_lines)
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num_job_lines = num_lines // nj
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start = 0
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for i in range(nj):
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end = start + num_job_lines
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split_path_nj = os.path.join(split_path, str(i + 1))
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os.mkdir(split_path_nj)
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wav_file = os.path.join(split_path_nj, "wav.scp")
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text_file = os.path.join(split_path_nj, "text")
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with open(wav_file, "w") as fw, open(text_file, "w") as ft:
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if i == nj - 1:
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fw.writelines(wav_lines[start:])
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ft.writelines(text_lines[start:])
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else:
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fw.writelines(wav_lines[start:end])
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ft.writelines(text_lines[start:end])
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start = end
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with open(list_file, "w") as f_data:
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for i in range(nj):
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wav_path = os.path.join(split_path, str(i + 1), "wav.scp")
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text_path = os.path.join(split_path, str(i + 1), "text")
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f_data.write(wav_path + " " + text_path + "\n")
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def prepare_data(args, distributed_option):
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distributed = distributed_option.distributed
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if not distributed or distributed_option.dist_rank == 0:
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filter_wav_text(args.data_dir, args.train_set)
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filter_wav_text(args.data_dir, args.valid_set)
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if args.dataset_type == "small":
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calc_shape(args, args.train_set)
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calc_shape(args, args.valid_set)
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if args.dataset_type == "large":
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generate_data_list(args.data_dir, args.train_set)
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generate_data_list(args.data_dir, args.valid_set)
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if args.dataset_type == "small":
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args.train_shape_file = [os.path.join(args.data_dir, args.train_set, "speech_shape")]
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args.valid_shape_file = [os.path.join(args.data_dir, args.valid_set, "speech_shape")]
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data_names = args.dataset_conf.get("data_names", "speech,text").split(",")
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data_types = args.dataset_conf.get("data_types", "sound,text").split(",")
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args.train_data_path_and_name_and_type = [
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["{}/{}/wav.scp".format(args.data_dir, args.train_set), data_names[0], data_types[0]],
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["{}/{}/text".format(args.data_dir, args.train_set), data_names[1], data_types[1]]
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]
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args.valid_data_path_and_name_and_type = [
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["{}/{}/wav.scp".format(args.data_dir, args.valid_set), data_names[0], data_types[0]],
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["{}/{}/text".format(args.data_dir, args.valid_set), data_names[1], data_types[1]]
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]
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if args.embed_path is not None:
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args.train_data_path_and_name_and_type[0].append(
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"{}/embed/kaldi_ark".format(os.path.join(args.embed_path, "embeds", args.train_set, "embeds.scp")))
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args.valid_data_path_and_name_and_type[0].append(
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"{}/embed/kaldi_ark".format(os.path.join(args.embed_path, "embeds", args.valid_set, "embeds.scp")))
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else:
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args.train_data_file = os.path.join(args.data_dir, args.train_set, "data.list")
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args.valid_data_file = os.path.join(args.data_dir, args.valid_set, "data.list")
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if distributed:
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dist.barrier()
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