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author | Richard Burton <richard.burton@arm.com> | 2021-11-10 16:27:14 +0000 |
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committer | Richard <richard.burton@arm.com> | 2021-11-10 16:34:16 +0000 |
commit | 005534664e192cf909a11435c4bc4696b1f4c51f (patch) | |
tree | f8314bd284561e1f0ff68fc393ee22d0318ae162 /scripts/py/rnnoise_dump_extractor.py | |
parent | dee53bc7769d6201ec27deea4405c0df6c9b0623 (diff) | |
download | ml-embedded-evaluation-kit-005534664e192cf909a11435c4bc4696b1f4c51f.tar.gz |
MLECO-2354 MLECO-2355 MLECO-2356: Moving noise reduction to public repository
* Use RNNoise model from PMZ
* Add Noise reduction use-case
Signed-off-by: Richard burton <richard.burton@arm.com>
Change-Id: Ia8cc7ef102e22a5ff8bfbd3833594a4905a66057
Diffstat (limited to 'scripts/py/rnnoise_dump_extractor.py')
-rw-r--r-- | scripts/py/rnnoise_dump_extractor.py | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/scripts/py/rnnoise_dump_extractor.py b/scripts/py/rnnoise_dump_extractor.py new file mode 100644 index 0000000..947a75a --- /dev/null +++ b/scripts/py/rnnoise_dump_extractor.py @@ -0,0 +1,65 @@ +# 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. + +""" +This script can be used with the noise reduction use case to save +the dumped noise reduced audio to a wav file. + +Example use: +python rnnoise_dump_extractor.py --dump_file output.bin --output_dir ./denoised_wavs/ +""" +import soundfile as sf +import numpy as np + +import argparse +from os import path + +import struct + +def extract(fp, output_dir, export_npy): + while True: + filename_length = struct.unpack("i", fp.read(4))[0] + + if filename_length == -1: + return + + filename = struct.unpack("{}s".format(filename_length), fp.read(filename_length))[0].decode('ascii') + audio_clip_length = struct.unpack("I", fp.read(4))[0] + output_file_name = path.join(output_dir, "denoised_{}".format(filename)) + audio_clip = fp.read(audio_clip_length) + + with sf.SoundFile(output_file_name, 'w', channels=1, samplerate=48000, subtype="PCM_16", endian="LITTLE") as wav_file: + wav_file.buffer_write(audio_clip, dtype='int16') + print("{} written to disk".format(output_file_name)) + + if export_npy: + output_file_name += ".npy" + pack_format = "{}h".format(int(audio_clip_length/2)) + npdata = np.array(struct.unpack(pack_format,audio_clip)).astype(np.int16) + np.save(output_file_name, npdata) + print("{} written to disk".format(output_file_name)) + +def main(args): + extract(args.dump_file, args.output_dir, args.export_npy) + +parser = argparse.ArgumentParser() +parser.add_argument("--dump_file", type=argparse.FileType('rb'), help="Dump file with audio files to extract.", required=True) +parser.add_argument("--output_dir", help="Output directory, Warning: Duplicated file names will be overwritten.", required=True) +parser.add_argument("--export_npy", help="Export the audio buffer in NumPy format", action="store_true") +args = parser.parse_args() + +if __name__=="__main__": + main(args) + |