mirror of
https://github.com/rhasspy/piper-sample-generator.git
synced 2026-08-27 18:15:58 -04:00
88 lines
2.6 KiB
Python
88 lines
2.6 KiB
Python
#!/usr/bin/env python3
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import argparse
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import audioop
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import sys
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import wave
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from pathlib import Path
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import numpy as np
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from audiomentations import Compose, ApplyImpulseResponse, Gain
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_DIR = Path(__file__).parent
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def main() -> None:
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parser = argparse.ArgumentParser()
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parser.add_argument("input_dir")
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parser.add_argument("output_dir")
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parser.add_argument("--sample-rate", type=int, required=True)
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args = parser.parse_args()
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impulses = list((_DIR / "impulses").glob("*.wav"))
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augment = Compose(
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transforms=[
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Gain(min_gain_db=-12, max_gain_db=0),
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ApplyImpulseResponse(impulses),
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]
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)
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input_dir = Path(args.input_dir)
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output_dir = Path(args.output_dir)
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output_dir.mkdir(parents=True, exist_ok=True)
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for input_wav in input_dir.glob("*.wav"):
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output_wav = output_dir / (input_wav.relative_to(input_dir))
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output_wav.parent.mkdir(parents=True, exist_ok=True)
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with wave.open(str(input_wav), "rb") as input_wav_file, wave.open(
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str(output_wav), "wb"
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) as output_wav_file:
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assert input_wav_file.getsampwidth() == 2
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assert input_wav_file.getnchannels() == 1
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input_audio = (
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np.frombuffer(
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input_wav_file.readframes(input_wav_file.getnframes()),
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dtype=np.int16,
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).astype(np.float32)
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/ 32767.0
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)
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output_audio = augment(
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input_audio, sample_rate=input_wav_file.getframerate()
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)
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output_wav_file.setframerate(
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args.sample_rate or input_wav_file.getframerate()
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)
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output_wav_file.setsampwidth(2)
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output_wav_file.setnchannels(1)
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output_audio_16 = audio_float_to_int16(output_audio)
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if args.sample_rate != input_wav_file.getframerate():
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output_audio_16, _state = audioop.ratecv(
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output_audio_16,
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2,
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1,
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input_wav_file.getframerate(),
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args.sample_rate,
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None,
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)
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output_wav_file.writeframes(output_audio_16)
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print(output_wav)
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def audio_float_to_int16(
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audio: np.ndarray, max_wav_value: float = 32767.0
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) -> np.ndarray:
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# Don't normalize
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audio_norm = audio * max_wav_value
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audio_norm = np.clip(audio_norm, -max_wav_value, max_wav_value)
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audio_norm = audio_norm.astype("int16")
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return audio_norm
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if __name__ == "__main__":
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main()
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