def linear2mu(signal, mu=255):
"""
-1 < signal < 1
"""
assert signal.max() <= 1 and signal.min() >= -1
y = np.sign(signal) * np.log(1.0 + mu * np.abs(signal)) / np.log(mu + 1)
return y
def compute(self):
signal = self.get_input("Input").get_array().squeeze()
print "signal.shape = ", signal.shape
lof = self.get_input("Low Freq")
hif = self.get_input("High Freq")
num_scalar_bins = self.get_input("Scalar Bins")
num_pts = signal.size
min_s = signal.min()
max_s = signal.max()
d = max_s - min_s
print "Accumulating over " + str(num_pts) + " points"
histo = numpy.zeros((num_scalar_bins,hif-lof))
f_sig = scipy.fftpack.fftn(signal)
for z in range(signal.shape[0]):
for y in range(signal.shape[1]):
for x in range(signal.shape[2]):
yray = f_sig[z,:,x].squeeze()
ty = self.stockwell(yray, lof, hif)
zray = f_sig[:,y,x].squeeze()
tz = self.stockwell(zray, lof, hif)
xray = f_sig[z,y,:].squeeze()
tx = self.stockwell(xray, lof, hif)
tx = tx[:,z].squeeze()
ty = ty[:,y].squeeze()
tz = tz[:,x].squeeze()
tx = tx * tx.conjugate()
ty = ty * ty.conjugate()
tz = tz * tz.conjugate()
ar = tx.real + ty.real + tz.real
ar = ar / ar.sum()
scalar = signal[z,y,x]
try:
bin = int((scalar - min_s) / d * float(num_scalar_bins-1.))
# dist[bin] += 1
# print bin, scalar, ar
sigma = self.force_get_input("Sigma")
if sigma:
ar = scipy.signal.gaussian(ar.size, sigma) * ar
histo[bin,:] += ar
except:
print "Cannot assign to bin: " + str(bin) +", scalar: " +str(scalar)
print "location = ", x, y, z
raise ModuleError("Cannot assign to bin: " + str(bin) +", scalar: " +str(scalar))
# print "done with y = ", y
print "done with z = ", z
out = NDArray()
out.set_array(histo)
self.set_output("Output", out)
def compute(self):
signal = self.getInputFromPort("Input").get_array()
lof = self.getInputFromPort("Low Freq")
hif = self.getInputFromPort("High Freq")
num_pts = signal.size
min_s = signal.min()
max_s = signal.max()
d = max_s - min_s
print "Accumulating over " + str(num_pts) + " points"
histo = numpy.zeros((512, hif - lof + 1))
print "Histo: ", histo.shape
dist = numpy.zeros(512)
for z in range(signal.shape[2]):
for y in range(signal.shape[1]):
for x in range(signal.shape[0]):
sigx = signal[z, y, :]
sigy = signal[z, :, x]
tx = st.st(sigx, lof, hif)
ty = st.st(sigy, lof, hif)
sigz = signal[:, y, z]
tz = st.st(sigz, lof, hif)
tz = tz[:, x].squeeze()
tz = tz * tz.conjugate()
tx = tx[:, z].squeeze()
ty = ty[:, y].squeeze()
tx = tx * tx.conjugate()
ty = ty * ty.conjugate()
ar = tx.real + ty.real + tz.real
ar = ar / ar.sum()
# ar = ar.sum(axis=1)
# print "ar: ", ar.shape
# ar.shape = (ar.shape[0],1)
scalar = signal[z, y, x]
try:
bin = int((scalar - min_s) / d * 511.)
# dist[bin] += 1
# print bin, scalar, ar
sigma = self.forceGetInputFromPort("Sigma")
if sigma:
ar = scipy.signal.gaussian(ar.size, sigma) * ar
histo[bin, :] += ar
except:
print "Cannot assign to bin: " + str(
bin) + ", scalar: " + str(scalar)
print "location = ", x, y, z
raise ModuleError("Cannot assign to bin: " + str(bin) +
", scalar: " + str(scalar))
# print "done with y = ", y
print "done with z = ", z
out = NDArray()
out.set_array(histo) # / dist)
self.setResult("Output", out)
def compute(self):
signal = self.get_input("Input").get_array()
lof = self.get_input("Low Freq")
hif = self.get_input("High Freq")
num_pts = signal.size
min_s = signal.min()
max_s = signal.max()
d = max_s - min_s
print "Accumulating over " + str(num_pts) + " points"
histo = numpy.zeros((512,hif-lof+1))
print "Histo: ",histo.shape
dist = numpy.zeros(512)
for z in range(signal.shape[2]):
for y in range(signal.shape[1]):
for x in range(signal.shape[0]):
sigx = signal[z,y,:]
sigy = signal[z,:,x]
tx = st.st(sigx, lof, hif)
ty = st.st(sigy, lof, hif)
sigz = signal[:,y,z]
tz = st.st(sigz, lof, hif)
tz = tz[:,x].squeeze()
tz = tz * tz.conjugate()
tx = tx[:,z].squeeze()
ty = ty[:,y].squeeze()
tx = tx * tx.conjugate()
ty = ty * ty.conjugate()
ar = tx.real + ty.real + tz.real
ar = ar / ar.sum()
# ar = ar.sum(axis=1)
# print "ar: ", ar.shape
# ar.shape = (ar.shape[0],1)
scalar = signal[z,y,x]
try:
bin = int((scalar - min_s) / d * 511.)
# dist[bin] += 1
# print bin, scalar, ar
sigma = self.force_get_input("Sigma")
if sigma:
ar = scipy.signal.gaussian(ar.size, sigma) * ar
histo[bin,:] += ar
except:
print "Cannot assign to bin: " + str(bin) +", scalar: " +str(scalar)
print "location = ", x, y, z
raise ModuleError("Cannot assign to bin: " + str(bin) +", scalar: " +str(scalar))
# print "done with y = ", y
print "done with z = ", z
out = NDArray()
out.set_array(histo)# / dist)
self.set_output("Output", out)
def normalize(signal):
"""Normalize signal between 0 and 1
Args:
signal (np.array/th.tensor): Signal to normalize
Returns:
np.array/th.tensor: Normalized signal
"""
signal -= signal.min()
signal /= signal.max()
return signal
def waveform_shaded(signal: np.ndarray, fs: int, start=0, end=None):
if end is None:
end = len(signal) / fs
ymargin_factor = 1.1
x_range = [start, end]
y_range = [ymargin_factor * signal.min(), ymargin_factor * signal.max()]
t = np.linspace(start, end, num=len(signal))
df = pd.DataFrame(data={'Time': t, 'Signal': signal})
cvs = ds.Canvas(x_range=x_range, y_range=y_range, plot_width=1500)
cols = ['Signal']
aggs = OrderedDict((c, cvs.line(df, 'Time', c)) for c in cols)
img = tf.shade(aggs['Signal'])
arr = np.array(img)
z = arr.tolist()
dims = len(z[0]), len(z)
x = np.linspace(x_range[0], x_range[1], dims[0])
y = np.linspace(y_range[0], y_range[1], dims[0])
fig = {
'data': [{
'x': x,
'y': y,
'z': z,
'type': 'heatmap',
'showscale': False,
'colorscale': [[0, 'rgba(255, 255, 255,0)'], [1, '#75baf2']],
}],
'layout': {
'height': 350,
'xaxis': {
'title': 'Time [s]',
'showline': True,
'zeroline': False,
'showgrid': False,
'showticklabels': True
},
'yaxis': {
'title': 'Amplitude',
'fixedrange': True,
'showline': False,
'zeroline': False,
'showgrid': False,
'showticklabels': False,
'ticks': ''
},
'title': 'Waveform'
}
}
return fig
def percentile_clip(signal, p):
"""Normalize signal between 0 and 1, clipping peak values above given percentile
Args:
signal (th.tensor): Signal to normalize
p (int): [0-100]. Percentile to clip to
Returns:
th.tensor: Clipped signal
"""
locs = th.arange(0, signal.shape[0])
peaks = th.ones(signal.shape, dtype=bool)
main = signal.take(locs)
plus = signal.take((locs + 1).clamp(0, signal.shape[0] - 1))
minus = signal.take((locs - 1).clamp(0, signal.shape[0] - 1))
peaks &= th.gt(main, plus)
peaks &= th.gt(main, minus)
signal = signal.clamp(0, percentile(signal[peaks], p))
signal /= signal.max()
return signal
def plot_signal_attr(fig, ax, attr, signal, fs=1.0, filter=True, lw=1.0):
# Plots a signal with explanation strength as sample colors
if filter:
signal = bandpass_filter(signal, fs, fc=[1, 30])
t = np.linspace(0, len(signal) / fs, len(signal))
points = np.array([t, signal]).T.reshape(-1, 1, 2)
segments = np.concatenate([points[:-1], points[1:]], axis=1)
# Create a continuous norm to map from data points to colors
norm = plt.Normalize(attr.min(), attr.max())
lc = LineCollection(segments, cmap='inferno_r', norm=norm)
# Set the values used for colormapping
lc.set_array(attr)
lc.set_linewidth(lw)
line = ax.add_collection(lc)
ax.set_xlim(t.min(), t.max())
ax.set_ylim(signal.min(), signal.max())
ax.get_yaxis().set_ticks([])
ax.get_xaxis().set_ticks([])
def vcorr(signal, corr, err=.01):
if corr == 1:
newsig = signal
elif corr == -1:
newsig = signal.max() - signal
else:
cval = 1. - (corr / 2. + .5)
ncorr = 1
sigfft = np.fft.rfft(signal)
newsig = np.copy(signal)
corrs = []
# for x in range(100):
while abs(ncorr - corr) > err:
# randangs = 2*(np.random.rand(len(signal)) - .5)
# randangs *= 2*np.pi*cval
randangs = np.pi / 6. * np.random.randn(len(signal)) + cval * np.pi
randangcnums = np.cos(randangs) + 1j * np.sin(randangs)
newsigfft = sigfft * randangcnums[:len(signal) / 2 + 1]
newsig = np.fft.irfft(newsigfft)
ncorr = stats.pearsonr(newsig, signal)[0]
corrs += [ncorr]
# return corrs
return newsig
def _computeExB(self, data):
"""
Giving the output of the conditional average
it compute the amplitude of radial and poloidal
electric field fluctuations taking into account the
amplitude of the Isat conditional average structure
and including only the fluctuation between 2.5 sigma of
the Isat amplitude
"""
signal = data.sel(sig='Is') - data.sel(sig='Is').min()
spline = UnivariateSpline(data.t,
signal.values - signal.max().item() / 2.,
s=0)
# find the roots and the closest roots to 0
roots = spline.roots()
tmin = roots[roots < 0][-1] * 2
try:
tmax = roots[roots > 0][0] * 2
except:
tmax = 2.5e-5
# now the fluctuations of the Epol
ii = np.where((data.t.values >= tmin) & (data.t.values <= tmax))[0]
# recompute Epol from CAS floating potential with an appropriate
# smoothing otherwise we have too noisy signal
_Epol = (data.sel(sig='VFT_' + str(int(self.plunge))) -
data.sel(sig='VFM_' + str(int(self.plunge)))) / 4e-3
_Epol = bottleneck.move_mean(_Epol, window=10)
Epol = np.abs(_Epol[ii].max() - _Epol[ii].min())
Erad = np.abs(
data.sel(sig='Erad')[ii].max().item() -
data.sel(sig='Erad')[ii].min().item())
EpolErr = np.mean(data.err[1, ii])
EradErr = np.mean(data.err[2, ii])
out = {'Er': Erad, 'ErErr': EradErr, 'Epol': Epol, 'EpolErr': EpolErr}
return out
def compute(self):
signal = self.getInputFromPort("Input").get_array().squeeze()
print "signal.shape = ", signal.shape
lof = self.getInputFromPort("Low Freq")
hif = self.getInputFromPort("High Freq")
num_scalar_bins = self.getInputFromPort("Scalar Bins")
num_pts = signal.size
min_s = signal.min()
max_s = signal.max()
d = max_s - min_s
print "Accumulating over " + str(num_pts) + " points"
histo = numpy.zeros((num_scalar_bins, hif - lof))
f_sig = scipy.fftpack.fftn(signal)
for z in range(signal.shape[0]):
for y in range(signal.shape[1]):
for x in range(signal.shape[2]):
yray = f_sig[z, :, x].squeeze()
ty = self.stockwell(yray, lof, hif)
zray = f_sig[:, y, x].squeeze()
tz = self.stockwell(zray, lof, hif)
xray = f_sig[z, y, :].squeeze()
tx = self.stockwell(xray, lof, hif)
tx = tx[:, z].squeeze()
ty = ty[:, y].squeeze()
tz = tz[:, x].squeeze()
tx = tx * tx.conjugate()
ty = ty * ty.conjugate()
tz = tz * tz.conjugate()
ar = tx.real + ty.real + tz.real
ar = ar / ar.sum()
scalar = signal[z, y, x]
try:
bin = int(
(scalar - min_s) / d * float(num_scalar_bins - 1.))
# dist[bin] += 1
# print bin, scalar, ar
sigma = self.forceGetInputFromPort("Sigma")
if sigma:
ar = scipy.signal.gaussian(ar.size, sigma) * ar
histo[bin, :] += ar
except:
print "Cannot assign to bin: " + str(
bin) + ", scalar: " + str(scalar)
print "location = ", x, y, z
raise ModuleError("Cannot assign to bin: " + str(bin) +
", scalar: " + str(scalar))
# print "done with y = ", y
print "done with z = ", z
out = NDArray()
out.set_array(histo)
self.setResult("Output", out)
import numpy as np
import sounddevice as sd
import scipy.signal
url = "https://file-examples-com.github.io/uploads/2017/11/file_example_MP3_700KB.mp3"
signal, resample_rate = librosa.load("file_example_MP3_700KB.mp3")
u = urlopen(url)
import miniaudio
import librosa
from src.features import plot_signal
import matplotlib.pyplot as plt
plot_signal(signal)
plt.show()
signal.max()
f = miniaudio.mp3_read_file_f32("file_example_MP3_700KB.mp3")
f.sample_rate
f.nchannels
f.samples
play(signal, 16000)
sd.stop()
len(signal)
873216/32000
pyaud = pyaudio.PyAudio()
srate=32000
stream = pyaud.open(format = pyaud.get_format_from_width(1),
def generate_feat_opts(path=None,
cfg={
'pkg': 'pysp',
'type': 'logfbank',
'nfilt': 40,
'delta': 2
},
signal=None,
rate=16000):
cfg = dict(cfg)
if cfg['pkg'] == 'pysp': # python_speech_features #
if signal is None:
rate, signal = wavfile.read(path)
if cfg['type'] == 'logfbank':
feat_mat = pyspfeat.base.logfbank(signal,
rate,
nfilt=cfg.get('nfilt', 40))
elif cfg['type'] == 'mfcc':
feat_mat = pyspfeat.base.mfcc(signal,
rate,
numcep=cfg.get('nfilt', 26) // 2,
nfilt=cfg.get('nfilt', 26))
elif cfg['type'] == 'wav':
feat_mat = pyspfeat.base.sigproc.framesig(
signal,
frame_len=cfg.get('frame_len', 400),
frame_step=cfg.get('frame_step', 160))
else:
raise NotImplementedError(
"feature type {} is not implemented/available".format(
cfg['type']))
pass
# delta #
comb_feat_mat = [feat_mat]
delta = cfg['delta']
if delta > 0:
delta_feat_mat = pyspfeat.base.delta(feat_mat, 2)
comb_feat_mat.append(delta_feat_mat)
if delta > 1:
delta2_feat_mat = pyspfeat.base.delta(delta_feat_mat, 2)
comb_feat_mat.append(delta2_feat_mat)
if delta > 2:
raise NotImplementedError(
"max delta is 2, larger than 2 is not normal setting")
return np.hstack(comb_feat_mat)
elif cfg['pkg'] == 'rosa':
if signal is None:
signal, rate = librosa.core.load(path, sr=cfg['sample_rate'])
assert rate == cfg[
'sample_rate'], "sample rate is different with current data"
if cfg.get('preemphasis', None) is not None:
# signal = np.append(signal[0], signal[1:] - cfg['preemphasis']*signal[:-1])
signal = signal_util.preemphasis(x, self.cfg['preemphasis'])
if cfg.get('pre', None) == 'meanstd':
signal = (signal - signal.mean()) / signal.std()
elif cfg.get('pre', None) == 'norm':
signal = (signal - signal.min()) / (signal.max() -
signal.min()) * 2 - 1
# raw feature
if cfg['type'] == 'wav':
if cfg.get('post', None) == 'mu':
signal = linear2mu(signal)
feat_mat = pyspfeat.base.sigproc.framesig(
signal,
frame_len=cfg.get('frame_len', 400),
frame_step=cfg.get('frame_step', 160))
return feat_mat
# spectrogram-based feature
raw_spec = signal_util.rosa_spectrogram(
signal,
n_fft=cfg['nfft'],
hop_length=cfg.get('winstep', None),
win_length=cfg.get('winlen', None))[0]
if cfg['type'] in ['logmelfbank', 'melfbank']:
mel_spec = signal_util.rosa_spec2mel(raw_spec, nfilt=cfg['nfilt'])
if cfg['type'] == 'logmelfbank':
return np.log(mel_spec)
else:
return mel_spec
elif cfg['type'] == 'lograwfbank':
return np.log(raw_spec)
elif cfg['type'] == 'rawfbank':
return raw_spec
else:
raise NotImplementedError()
elif cfg['pkg'] == 'taco':
# SPECIAL FOR TACOTRON #
tacohelper = TacotronHelper(cfg)
if signal is None:
signal = tacohelper.load_wav(path)
assert len(signal) != 0, ('file {} is empty'.format(path))
try:
if cfg['type'] == 'raw':
feat = tacohelper.spectrogram(signal).T
elif cfg['type'] == 'mel':
feat = tacohelper.melspectrogram(signal).T
else:
raise NotImplementedError()
except:
import ipdb
ipdb.set_trace()
pass
return feat
elif cfg['pkg'] == 'world':
if path is None:
with tempfile.NamedTemporaryFile() as tmpfile:
wavfile.write(tmpfile.name, rate, signal)
logf0, bap, mgc = world_vocoder_util.world_analysis(
tmpfile.name, cfg['mcep'])
else:
logf0, bap, mgc = world_vocoder_util.world_analysis(
path, cfg['mcep'])
vuv, f0, bap, mgc = world_vocoder_util.world2feat(logf0, bap, mgc)
# ignore delta, avoid curse of dimensionality #
return vuv, f0, bap, mgc
else:
raise NotImplementedError()
pass