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| # Copyright (c) Facebook, Inc. and its affiliates. | |
| # | |
| # This source code is licensed under the MIT license found in the | |
| # LICENSE file in the root directory of this source tree. | |
| import logging | |
| import os | |
| import sys | |
| import soundfile as sf | |
| import torch | |
| import torchaudio | |
| from feature_utils import get_path_iterator, dump_feature | |
| logging.basicConfig( | |
| format="%(asctime)s | %(levelname)s | %(name)s | %(message)s", | |
| datefmt="%Y-%m-%d %H:%M:%S", | |
| level=os.environ.get("LOGLEVEL", "INFO").upper(), | |
| stream=sys.stdout, | |
| ) | |
| logger = logging.getLogger("dump_mfcc_feature") | |
| class MfccFeatureReader(object): | |
| def __init__(self, sample_rate): | |
| self.sample_rate = sample_rate | |
| def read_audio(self, path, ref_len=None): | |
| wav, sr = sf.read(path) | |
| assert sr == self.sample_rate, sr | |
| if wav.ndim == 2: | |
| wav = wav.mean(-1) | |
| assert wav.ndim == 1, wav.ndim | |
| if ref_len is not None and abs(ref_len - len(wav)) > 160: | |
| logging.warning(f"ref {ref_len} != read {len(wav)} ({path})") | |
| return wav | |
| def get_feats(self, path, ref_len=None): | |
| x = self.read_audio(path, ref_len) | |
| with torch.no_grad(): | |
| x = torch.from_numpy(x).float() | |
| x = x.view(1, -1) | |
| mfccs = torchaudio.compliance.kaldi.mfcc( | |
| waveform=x, | |
| sample_frequency=self.sample_rate, | |
| use_energy=False, | |
| ) # (time, freq) | |
| mfccs = mfccs.transpose(0, 1) # (freq, time) | |
| deltas = torchaudio.functional.compute_deltas(mfccs) | |
| ddeltas = torchaudio.functional.compute_deltas(deltas) | |
| concat = torch.cat([mfccs, deltas, ddeltas], dim=0) | |
| concat = concat.transpose(0, 1).contiguous() # (freq, time) | |
| return concat | |
| def main(tsv_dir, split, nshard, rank, feat_dir, sample_rate): | |
| reader = MfccFeatureReader(sample_rate) | |
| generator, num = get_path_iterator(f"{tsv_dir}/{split}.tsv", nshard, rank) | |
| dump_feature(reader, generator, num, split, nshard, rank, feat_dir) | |
| if __name__ == "__main__": | |
| import argparse | |
| parser = argparse.ArgumentParser() | |
| parser.add_argument("tsv_dir") | |
| parser.add_argument("split") | |
| parser.add_argument("nshard", type=int) | |
| parser.add_argument("rank", type=int) | |
| parser.add_argument("feat_dir") | |
| parser.add_argument("--sample_rate", type=int, default=16000) | |
| args = parser.parse_args() | |
| logger.info(args) | |
| main(**vars(args)) | |