import argparse
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import os
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from kaldiio import WriteHelper
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import funasr.modules.eend_ola.utils.feature as feature
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from funasr.modules.eend_ola.utils.kaldi_data import load_segments_rechash, load_utt2spk, load_wav_scp, load_reco2dur, \
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load_spk2utt, load_wav
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def _count_frames(data_len, size, step):
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return int((data_len - size + step) / step)
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def _gen_frame_indices(
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data_length, size=2000, step=2000,
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use_last_samples=False,
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label_delay=0,
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subsampling=1):
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i = -1
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for i in range(_count_frames(data_length, size, step)):
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yield i * step, i * step + size
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if use_last_samples and i * step + size < data_length:
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if data_length - (i + 1) * step - subsampling * label_delay > 0:
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yield (i + 1) * step, data_length
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class KaldiData:
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def __init__(self, data_dir, idx):
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self.data_dir = data_dir
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segment_file = os.path.join(self.data_dir, 'segments.{}'.format(idx))
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self.segments = load_segments_rechash(segment_file)
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utt2spk_file = os.path.join(self.data_dir, 'utt2spk.{}'.format(idx))
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self.utt2spk = load_utt2spk(utt2spk_file)
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wav_file = os.path.join(self.data_dir, 'wav.scp.{}'.format(idx))
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self.wavs = load_wav_scp(wav_file)
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reco2dur_file = os.path.join(self.data_dir, 'reco2dur.{}'.format(idx))
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self.reco2dur = load_reco2dur(reco2dur_file)
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spk2utt_file = os.path.join(self.data_dir, 'spk2utt.{}'.format(idx))
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self.spk2utt = load_spk2utt(spk2utt_file)
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def load_wav(self, recid, start=0, end=None):
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data, rate = load_wav(self.wavs[recid], start, end)
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return data, rate
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class KaldiDiarizationDataset():
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def __init__(
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self,
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data_dir,
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index,
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chunk_size=2000,
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context_size=0,
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frame_size=1024,
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frame_shift=256,
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subsampling=1,
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rate=16000,
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input_transform=None,
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use_last_samples=False,
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label_delay=0,
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n_speakers=None,
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):
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self.data_dir = data_dir
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self.index = index
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self.chunk_size = chunk_size
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self.context_size = context_size
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self.frame_size = frame_size
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self.frame_shift = frame_shift
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self.subsampling = subsampling
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self.input_transform = input_transform
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self.n_speakers = n_speakers
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self.chunk_indices = []
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self.label_delay = label_delay
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self.data = KaldiData(self.data_dir, index)
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for rec, path in self.data.wavs.items():
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data_len = int(self.data.reco2dur[rec] * rate / frame_shift)
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data_len = int(data_len / self.subsampling)
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for st, ed in _gen_frame_indices(
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data_len, chunk_size, chunk_size, use_last_samples,
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label_delay=self.label_delay,
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subsampling=self.subsampling):
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self.chunk_indices.append(
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(rec, path, st * self.subsampling, ed * self.subsampling))
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print(len(self.chunk_indices), " chunks")
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def convert(args):
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dataset = KaldiDiarizationDataset(
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data_dir=args.data_dir,
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index=args.index,
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chunk_size=args.num_frames,
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context_size=args.context_size,
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input_transform="logmel23_mn",
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frame_size=args.frame_size,
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frame_shift=args.frame_shift,
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subsampling=args.subsampling,
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rate=8000,
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use_last_samples=True,
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)
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feature_ark_file = os.path.join(args.output_dir, "feature.ark.{}".format(args.index))
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feature_scp_file = os.path.join(args.output_dir, "feature.scp.{}".format(args.index))
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label_ark_file = os.path.join(args.output_dir, "label.ark.{}".format(args.index))
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label_scp_file = os.path.join(args.output_dir, "label.scp.{}".format(args.index))
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with WriteHelper('ark,scp:{},{}'.format(feature_ark_file, feature_scp_file)) as feature_writer, \
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WriteHelper('ark,scp:{},{}'.format(label_ark_file, label_scp_file)) as label_writer:
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for idx, (rec, path, st, ed) in enumerate(dataset.chunk_indices):
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Y, T = feature.get_labeledSTFT(
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dataset.data,
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rec,
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st,
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ed,
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dataset.frame_size,
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dataset.frame_shift,
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dataset.n_speakers)
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Y = feature.transform(Y, dataset.input_transform)
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Y_spliced = feature.splice(Y, dataset.context_size)
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Y_ss, T_ss = feature.subsample(Y_spliced, T, dataset.subsampling)
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st = '{:0>7d}'.format(st)
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ed = '{:0>7d}'.format(ed)
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key = "{}_{}_{}".format(rec, st, ed)
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feature_writer(key, Y_ss)
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label_writer(key, T_ss.reshape(-1))
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if __name__ == '__main__':
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parser = argparse.ArgumentParser()
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parser.add_argument("--data_dir", type=str)
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parser.add_argument("--output_dir", type=str)
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parser.add_argument("--index", type=str)
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parser.add_argument("--num_frames", type=int, default=500)
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parser.add_argument("--context_size", type=int, default=7)
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parser.add_argument("--frame_size", type=int, default=200)
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parser.add_argument("--frame_shift", type=int, default=80)
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parser.add_argument("--subsampling", type=int, default=10)
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args = parser.parse_args()
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convert(args)
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