voice-changer/server/voice_changer/RVC/pitchExtractor/DioPitchExtractor.py

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import pyworld
import numpy as np
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from const import EnumPitchExtractorTypes
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from voice_changer.RVC.pitchExtractor.PitchExtractor import PitchExtractor
class DioPitchExtractor(PitchExtractor):
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pitchExtractorType: EnumPitchExtractorTypes = EnumPitchExtractorTypes.dio
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def extract(self, audio, pitchf, f0_up_key, sr, window, silence_front=0):
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audio = audio.detach().cpu().numpy()
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n_frames = int(len(audio) // window) + 1
start_frame = int(silence_front * sr / window)
real_silence_front = start_frame * window / sr
silence_front_offset = int(np.round(real_silence_front * sr))
audio = audio[silence_front_offset:]
f0_min = 50
f0_max = 1100
f0_mel_min = 1127 * np.log(1 + f0_min / 700)
f0_mel_max = 1127 * np.log(1 + f0_max / 700)
_f0, t = pyworld.dio(
audio.astype(np.double),
sr,
f0_floor=f0_min,
f0_ceil=f0_max,
channels_in_octave=2,
frame_period=10,
)
f0 = pyworld.stonemask(audio.astype(np.double), _f0, t, sr)
f0 = np.pad(f0.astype("float"), (start_frame, n_frames - len(f0) - start_frame))
f0 *= pow(2, f0_up_key / 12)
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pitchf[-f0.shape[0]:] = f0[:pitchf.shape[0]]
f0bak = pitchf.copy()
f0_mel = 1127.0 * np.log(1.0 + f0bak / 700.0)
f0_mel = np.clip(
(f0_mel - f0_mel_min) * 254.0 / (f0_mel_max - f0_mel_min) + 1.0, 1.0, 255.0
)
pitch_coarse = f0_mel.astype(int)
return pitch_coarse, pitchf