scripts/py/gen_audio.py

#!env/bin/python3

#  Copyright (c) 2021 Arm Limited. All rights reserved.
#  SPDX-License-Identifier: Apache-2.0
#
#  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.
"""
Utility script to convert an audio clip into eval platform desired spec.
"""
import soundfile as sf

from argparse import ArgumentParser
from os import path

from gen_utils import AudioUtils

parser = ArgumentParser()
parser.add_argument("--audio_path", help="Audio file path", required=True)
parser.add_argument("--output_dir", help="Output directory", required=True)
parser.add_argument("--sampling_rate", type=int, help="target sampling rate.", default=16000)
parser.add_argument("--mono", type=bool, help="convert signal to mono.", default=True)
parser.add_argument("--offset", type=float, help="start reading after this time (in seconds).", default=0)
parser.add_argument("--duration", type=float, help="only load up to this much audio (in seconds).", default=0)
parser.add_argument("--res_type", type=AudioUtils.res_data_type, help=f"Resample type: {AudioUtils.res_type_list()}.", default='kaiser_best')
parser.add_argument("--min_samples", type=int, help="Minimum sample number.", default=16000)
parser.add_argument("-v", "--verbosity", action="store_true")
args = parser.parse_args()

def main(args):
    audio_data, samplerate = AudioUtils.load_resample_audio_clip(args.audio_path,
                                                args.sampling_rate,
                                                args.mono,  args.offset,
                                                args.duration, args.res_type,
                                                args.min_samples)
    sf.write(path.join(args.output_dir, path.basename(args.audio_path)), audio_data, samplerate)

if __name__ == '__main__':
    main(args)