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""" |
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@File : spec.py |
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@Time : 2023/8/8 下午5:10 |
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@Author : waytan |
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@Contact : [email protected] |
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@License : (C)Copyright 2023, Tencent |
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@Desc : Spec |
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""" |
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import torch as th |
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def spectro(x, n_fft=512, hop_length=None, pad=0): |
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*other, length = x.shape |
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x = x.reshape(-1, length) |
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is_mps = x.device.type == 'mps' |
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if is_mps: |
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x = x.cpu() |
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z = th.stft(x, |
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n_fft * (1 + pad), |
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hop_length or n_fft // 4, |
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window=th.hann_window(n_fft).to(x), |
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win_length=n_fft, |
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normalized=True, |
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center=True, |
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return_complex=True, |
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pad_mode='reflect') |
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_, freqs, frame = z.shape |
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return z.view(*other, freqs, frame) |
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def ispectro(z, hop_length=None, length=None, pad=0): |
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*other, freqs, frames = z.shape |
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n_fft = 2 * freqs - 2 |
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z = z.view(-1, freqs, frames) |
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win_length = n_fft // (1 + pad) |
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is_mps = z.device.type == 'mps' |
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if is_mps: |
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z = z.cpu() |
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x = th.istft(z, |
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n_fft, |
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hop_length, |
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window=th.hann_window(win_length).to(z.real), |
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win_length=win_length, |
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normalized=True, |
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length=length, |
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center=True) |
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_, length = x.shape |
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return x.view(*other, length) |
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