File size: 1,267 Bytes
f113387 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 |
"""
This code is based on Facebook's HDemucs code: https://github.com/facebookresearch/demucs
"""
"""Conveniance wrapper to perform STFT and iSTFT"""
import torch as th
def spectro(x, n_fft=512, hop_length=None, pad=0, win_length=None):
*other, length = x.shape
x = x.reshape(-1, length)
z = th.stft(x,
n_fft * (1 + pad),
hop_length or n_fft // 4,
window=th.hann_window(win_length).to(x),
win_length=win_length or n_fft,
normalized=True,
center=True,
return_complex=True,
pad_mode='reflect')
_, freqs, frame = z.shape
return z.view(*other, freqs, frame)
def ispectro(z, hop_length=None, length=None, pad=0, win_length=None):
*other, freqs, frames = z.shape
n_fft = 2 * freqs - 2
z = z.view(-1, freqs, frames)
win_length = win_length or n_fft // (1 + pad)
x = th.istft(z,
n_fft,
hop_length or n_fft // 2,
window=th.hann_window(win_length).to(z.real),
win_length=win_length,
normalized=True,
length=length,
center=True)
_, length = x.shape
return x.view(*other, length) |