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139 lines
4.7 KiB
139 lines
4.7 KiB
"""
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Download, unpack and create manifest for Librespeech dataset.
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Manifest is a json file with each line containing one audio clip filepath,
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its transcription text string, and its duration. It servers as a unified
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interfance to organize different data sets.
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"""
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import paddle.v2 as paddle
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from paddle.v2.dataset.common import md5file
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import os
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import wget
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import tarfile
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import argparse
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import soundfile
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import json
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DATA_HOME = os.path.expanduser('~/.cache2/paddle/dataset/speech')
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URL_ROOT = "http://www.openslr.org/resources/12"
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URL_TEST_CLEAN = URL_ROOT + "/test-clean.tar.gz"
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URL_TEST_OTHER = URL_ROOT + "/test-other.tar.gz"
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URL_DEV_CLEAN = URL_ROOT + "/dev-clean.tar.gz"
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URL_DEV_OTHER = URL_ROOT + "/dev-other.tar.gz"
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URL_TRAIN_CLEAN_100 = URL_ROOT + "/train-clean-100.tar.gz"
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URL_TRAIN_CLEAN_360 = URL_ROOT + "/train-clean-360.tar.gz"
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URL_TRAIN_OTHER_500 = URL_ROOT + "/train-other-500.tar.gz"
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MD5_TEST_CLEAN = "32fa31d27d2e1cad72775fee3f4849a9"
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MD5_DEV_CLEAN = "42e2234ba48799c1f50f24a7926300a1"
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MD5_TRAIN_CLEAN_100 = "2a93770f6d5c6c964bc36631d331a522"
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MD5_TRAIN_CLEAN_360 = "c0e676e450a7ff2f54aeade5171606fa"
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MD5_TRAIN_CLEAN_500 = "d1a0fd59409feb2c614ce4d30c387708"
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parser = argparse.ArgumentParser(
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description='Downloads and prepare LibriSpeech dataset.')
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parser.add_argument(
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"--target_dir",
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default=DATA_HOME + "/Libri",
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type=str,
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help="Directory to save the dataset. (default: %(default)s)")
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parser.add_argument(
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"--manifest_prefix",
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default="manifest.libri",
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type=str,
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help="Filepath prefix for output manifests. (default: %(default)s)")
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args = parser.parse_args()
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def download(url, md5sum, target_dir):
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"""
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Download file from url to target_dir, and check md5sum.
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"""
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if not os.path.exists(target_dir): os.makedirs(target_dir)
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filepath = os.path.join(target_dir, url.split("/")[-1])
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if not (os.path.exists(filepath) and md5file(filepath) == md5sum):
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print("Downloading %s ..." % url)
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wget.download(url, target_dir)
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print("\nMD5 Chesksum %s ..." % filepath)
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assert md5file(filepath) == md5sum, "MD5 checksum failed."
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return filepath
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def unpack(filepath, target_dir):
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"""
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Unpack the file to the target_dir.
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"""
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print("Unpacking %s ..." % filepath)
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tar = tarfile.open(filepath)
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tar.extractall(target_dir)
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tar.close()
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return target_dir
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def create_manifest(data_dir, manifest_path):
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"""
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Create a manifest file summarizing the dataset (list of filepath and meta
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data).
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Each line of the manifest contains one audio clip filepath, its
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transcription text string, and its duration. Manifest file servers as a
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unified interfance to organize data sets.
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"""
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print("Creating manifest %s ..." % manifest_path)
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json_lines = []
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for subfolder, _, filelist in os.walk(data_dir):
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text_filelist = [
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filename for filename in filelist if filename.endswith('trans.txt')
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]
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if len(text_filelist) > 0:
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text_filepath = os.path.join(data_dir, subfolder, text_filelist[0])
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for line in open(text_filepath):
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segments = line.strip().split()
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text = ' '.join(segments[1:]).lower()
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audio_filepath = os.path.join(data_dir, subfolder,
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segments[0] + '.flac')
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audio_data, samplerate = soundfile.read(audio_filepath)
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duration = float(len(audio_data)) / samplerate
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json_lines.append(
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json.dumps({
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'audio_filepath': audio_filepath,
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'duration': duration,
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'text': text
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}))
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with open(manifest_path, 'w') as out_file:
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for line in json_lines:
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out_file.write(line + '\n')
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def prepare_dataset(url, md5sum, target_dir, manifest_path):
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"""
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Download, unpack and create summmary manifest file.
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"""
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filepath = download(url, md5sum, target_dir)
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unpacked_dir = unpack(filepath, target_dir)
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create_manifest(unpacked_dir, manifest_path)
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def main():
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prepare_dataset(
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url=URL_TEST_CLEAN,
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md5sum=MD5_TEST_CLEAN,
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target_dir=os.path.join(args.target_dir, "test-clean"),
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manifest_path=args.manifest_prefix + ".test-clean")
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prepare_dataset(
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url=URL_DEV_CLEAN,
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md5sum=MD5_DEV_CLEAN,
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target_dir=os.path.join(args.target_dir, "dev-clean"),
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manifest_path=args.manifest_prefix + ".dev-clean")
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prepare_dataset(
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url=URL_TRAIN_CLEAN_100,
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md5sum=MD5_TRAIN_CLEAN_100,
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target_dir=os.path.join(args.target_dir, "train-clean-100"),
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manifest_path=args.manifest_prefix + ".train-clean-100")
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if __name__ == '__main__':
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main()
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