mirror of
https://github.com/w-okada/voice-changer.git
synced 2025-02-09 03:37:51 +03:00
40 lines
1.5 KiB
Python
40 lines
1.5 KiB
Python
import numpy as np
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import torch
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import torch.nn as nn
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class VolumeExtractor:
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def __init__(self, hop_size: float):
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self.hop_size = hop_size
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def getVolumeExtractorInfo(self):
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return {
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"hop_size": self.hop_size
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}
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def extract(self, audio): # audio: 1d numpy array
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audio = audio.squeeze().cpu()
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n_frames = int(len(audio) // self.hop_size) + 1
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audio2 = audio ** 2
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audio2 = np.pad(audio2, (int(self.hop_size // 2), int((self.hop_size + 1) // 2)), mode='reflect')
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volume = np.array(
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[np.mean(audio2[int(n * self.hop_size): int((n + 1) * self.hop_size)]) for n in range(n_frames)])
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volume = np.sqrt(volume)
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return volume
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def get_mask_from_volume(self, volume, block_size: int, threhold=-60.0, device='cpu') -> torch.Tensor:
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mask = (volume > 10 ** (float(threhold) / 20)).astype('float')
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mask = np.pad(mask, (4, 4), constant_values=(mask[0], mask[-1]))
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mask = np.array([np.max(mask[n: n + 9]) for n in range(len(mask) - 8)])
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mask = torch.from_numpy(mask).float().to(device).unsqueeze(-1).unsqueeze(0)
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mask = upsample(mask, block_size).squeeze(-1)
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return mask
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def upsample(signal: torch.Tensor, factor: int) -> torch.Tensor:
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signal = signal.permute(0, 2, 1)
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signal = nn.functional.interpolate(torch.cat((signal, signal[:, :, -1:]), 2), size=signal.shape[-1] * factor + 1, mode='linear', align_corners=True)
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signal = signal[:, :, :-1]
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return signal.permute(0, 2, 1)
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