def test_pinv_of(fb_class):
fb = fb_class(n_filters=500, kernel_size=16, stride=8)
encoder = Encoder(fb)
# Pseudo inverse can be taken from an Encoder/Decoder class or Filterbank.
decoder_e = Decoder.pinv_of(encoder)
decoder_f = Decoder.pinv_of(fb)
assert_allclose(decoder_e.filters(), decoder_f.filters())
# Check filter computing
inp = torch.randn(1, 1, 32000)
_ = decoder_e(encoder(inp))
decoder = Decoder(fb)
# Pseudo inverse can be taken from an Encoder/Decoder class or Filterbank.
encoder_e = Encoder.pinv_of(decoder)
encoder_f = Encoder.pinv_of(fb)
assert_allclose(encoder_e.filters(), encoder_f.filters())
def test_stft_def(fb_config):
""" Check consistency between two calls."""
fb = STFTFB(**fb_config)
enc = Encoder(fb)
dec = Decoder(fb)
enc2, dec2 = make_enc_dec("stft", **fb_config)
testing.assert_allclose(enc.filterbank.filters(),
enc2.filterbank.filters())
testing.assert_allclose(dec.filterbank.filters(),
dec2.filterbank.filters())
def test_griffinlim(fb_config, feed_istft, feed_angle):
stft = Encoder(STFTFB(**fb_config))
istft = None if not feed_istft else Decoder(STFTFB(**fb_config))
wav = torch.randn(2, 1, 8000)
spec = stft(wav)
tf_mask = torch.sigmoid(torch.randn_like(spec))
masked_spec = spec * tf_mask
mag = transforms.mag(masked_spec, -2)
angles = None if not feed_angle else transforms.angle(masked_spec, -2)
griffin_lim(mag, stft, angles=angles, istft_dec=istft, n_iter=3)
def test_fb_def_and_forward_all_dims(fb_class, fb_config):
""" Test encoder/decoder on other shapes than 3D"""
# Definition
enc = Encoder(fb_class(**fb_config))
dec = Decoder(fb_class(**fb_config))
# 3D Forward with one channel
inp = torch.randn(3, 1, 32000)
tf_out = enc(inp)
assert tf_out.shape[:2] == (3, enc.filterbank.n_feats_out)
out = dec(tf_out)
assert out.shape[:-1] == inp.shape[:-1] # Time axis can differ
def test_fb_forward_multichannel(fb_class, fb_config, ndim):
""" Test encoder/decoder in multichannel setting"""
# Definition
enc = Encoder(fb_class(**fb_config))
dec = Decoder(fb_class(**fb_config))
# 3D Forward with several channels
tensor_shape = tuple([random.randint(2, 4)
for _ in range(ndim)]) + (4000, )
inp = torch.randn(tensor_shape)
tf_out = enc(inp)
assert tf_out.shape[:ndim + 1] == (tensor_shape[:-1] +
(enc.filterbank.n_feats_out, ))
out = dec(tf_out)
assert out.shape[:-1] == inp.shape[:-1] # Time axis can differ
def test_perfect_resyn_window(fb_config, analysis_window_name,
use_torch_window):
""" Unit test perfect reconstruction """
kernel_size = fb_config["kernel_size"]
window = get_window(analysis_window_name, kernel_size)
if use_torch_window:
window = torch.Tensor(window)
enc = Encoder(STFTFB(**fb_config, window=window))
# Compute window for perfect resynthesis
synthesis_window = perfect_synthesis_window(enc.filterbank.window,
enc.stride)
dec = Decoder(STFTFB(**fb_config, window=synthesis_window))
inp_wav = torch.ones(1, 1, 32000)
out_wav = dec(enc(inp_wav))[:, :, kernel_size:-kernel_size]
inp_test = inp_wav[:, :, kernel_size:-kernel_size]
testing.assert_allclose(inp_test, out_wav)
def test_misi(fb_config, feed_istft, feed_angle):
stft = Encoder(STFTFB(**fb_config))
istft = None if not feed_istft else Decoder(STFTFB(**fb_config))
n_src = 3
# Create mixture
wav = torch.randn(2, 1, 8000)
spec = stft(wav).unsqueeze(1)
# Create n_src masks on mixture spec and apply them
shape = list(spec.shape)
shape[1] *= n_src
tf_mask = torch.sigmoid(torch.randn(*shape))
masked_specs = spec * tf_mask
# Separate mag and angle.
mag = transforms.mag(masked_specs, -2)
angles = None if not feed_angle else transforms.angle(masked_specs, -2)
est_wavs = misi(wav, mag, stft, angles=angles, istft_dec=istft, n_iter=2)
# We actually don't know the last dim because ISTFT(STFT()) cuts the end
assert est_wavs.shape[:-1] == (2, n_src)
def test_fb_def_and_forward_lowdim(fb_class, fb_config):
""" Test filterbank definition and encoder/decoder forward."""
# Definition
enc = Encoder(fb_class(**fb_config))
dec = Decoder(fb_class(**fb_config))
# Forward
inp = torch.randn(1, 1, 16000)
tf_out = enc(inp)
# Assert for 2D inputs
with pytest.warns(UserWarning):
# STFT(2D) gives 3D and iSTFT(3D) gives 3D. UserWarning about that.
assert_allclose(enc(inp), enc(inp[0]))
# Assert for 1D inputs
assert_allclose(enc(inp)[0], enc(inp[0, 0]))
out = dec(tf_out)
# Assert for 4D inputs
tf_out_4d = tf_out.repeat(1, 2, 1, 1)
out_4d = dec(tf_out_4d)
assert_allclose(out, out_4d[:, 0:1])
# Asser for 2D inputs
assert_allclose(out[0, 0], dec(tf_out[0]))
assert tf_out.shape[1] == enc.filterbank.n_feats_out
def __init__(self, fb_conf, mask_conf):
super().__init__()
self.n_src = mask_conf["n_src"]
self.n_filters = fb_conf["n_filters"]
# Create TasNet encoders and decoders (could use nn.Conv1D as well)
self.encoder_sig = Encoder(FreeFB(**fb_conf))
self.encoder_relu = Encoder(FreeFB(**fb_conf))
self.decoder = Decoder(FreeFB(**fb_conf))
self.bn_layer = GlobLN(fb_conf["n_filters"])
# Create TasNet masker
self.masker = nn.Sequential(
SingleRNN(
"lstm",
fb_conf["n_filters"],
hidden_size=mask_conf["n_units"],
n_layers=mask_conf["n_layers"],
bidirectional=True,
dropout=mask_conf["dropout"],
),
nn.Linear(2 * mask_conf["n_units"], self.n_src * self.n_filters),
nn.Sigmoid(),
)
def test_torch_stft(
n_fft_next_pow,
hop_ratio,
win_length,
window,
center,
pad_mode,
normalized,
sample_rate,
pass_length,
wav_shape,
):
# Accept 0.1 less tolerance for larger windows.
RTOL = 1e-3 if win_length > 256 else 1e-4
ATOL = 1e-4 if win_length > 256 else 1e-5
wav = torch.randn(wav_shape, dtype=torch.float32)
output_len = wav.shape[-1] if pass_length else None
n_fft = win_length if not n_fft_next_pow else next_power_of_2(win_length)
hop_length = win_length // hop_ratio
window = None if window is None else get_window(
window, win_length, fftbins=True)
if window is not None:
# Cannot restore the signal without overlap and near to zero window.
if hop_ratio == 1 and (window**2 < 1e-11).any():
pass
fb = TorchSTFTFB.from_torch_args(
n_fft=n_fft,
hop_length=hop_length,
win_length=win_length,
window=window,
center=center,
pad_mode=pad_mode,
normalized=normalized,
onesided=True,
sample_rate=sample_rate,
)
stft = Encoder(fb)
istft = Decoder(fb)
spec = torch.stft(
wav,
n_fft=n_fft,
hop_length=hop_length,
win_length=win_length,
window=fb.torch_window,
center=center,
pad_mode=pad_mode,
normalized=normalized,
onesided=True,
)
spec_asteroid = stft(wav)
torch_spec = to_asteroid(spec.float())
assert_allclose(spec_asteroid, torch_spec, rtol=RTOL, atol=ATOL)
try:
wav_back = torch.istft(
spec,
n_fft=n_fft,
hop_length=hop_length,
win_length=win_length,
window=fb.torch_window,
center=center,
normalized=normalized,
onesided=True,
length=output_len,
)
except RuntimeError:
# If there was a RuntimeError, the OLA had zeros. So we cannot unit test
# But we can make sure that istft raises a warning about it.
with pytest.warns(RuntimeWarning):
_ = istft(spec_asteroid, length=output_len)
else:
# If there was no RuntimeError, we unit-test against the results.
wav_back_asteroid = istft(spec_asteroid, length=output_len)
# Asteroid always returns a longer signal.
assert wav_back_asteroid.shape[-1] >= wav_back.shape[-1]
# The unit test is done on the left part of the signal.
assert_allclose(wav_back_asteroid[:wav_back.shape[-1]],
wav_back.float(),
rtol=RTOL,
atol=ATOL)