def get_wav(self):
assert self.donesynth
waveform = Waveform()
waveform.samples = np.zeros(LIBHTS.HTS_Engine_get_nsamples(
self.engine), np.int16) #16-bit samples
waveform.samplerate = int(
LIBHTS.HTS_Engine_get_sampling_frequency(self.engine))
waveform.channels = 1
for i in range(len(waveform.samples)):
waveform.samples[i] = LIBHTS.HTS_Engine_get_generated_speech(
self.engine, i) #copy
return waveform
def _concatunits(self, utt, args):
""" Concatenates units and produces waveform via residual
excited LPC synthesis filter...
"""
unit_rel = utt.get_relation("Unit")
#concat:
unit_item = unit_rel.head_item
lpctrack = copy.deepcopy(
unit_item["selected_unit"]["candidate"]["lpc-coefs"])
residuals = window_residual(
unit_item["selected_unit"]["candidate"]["lpc-coefs"],
unit_item["selected_unit"]["candidate"]["residuals"])
unit_item = unit_item.next_item
while unit_item is not None:
temptrack = unit_item["selected_unit"]["candidate"]["lpc-coefs"]
#append lpccoefs to lpctrack:
lpctrack.times = np.concatenate(
(lpctrack.times, (temptrack.times + lpctrack.times[-1])))
lpctrack.values = np.concatenate(
(lpctrack.values, temptrack.values))
#append windowed residuals:
residuals.extend(
window_residual(
temptrack,
unit_item["selected_unit"]["candidate"]["residuals"]))
unit_item = unit_item.next_item
#overlap add residual:
lastsample = int(round(lpctrack.times[-1] * SAMPLERATE)) + int(
round(len(residuals[-1]) / 2))
residual = np.zeros(lastsample + 1)
for i, time in enumerate(lpctrack.times):
centersample = int(round(time * SAMPLERATE))
firstsample = centersample - int(len(residuals[i]) / 2)
residual[firstsample:firstsample + len(residuals[i])] += np.array(
residuals[i])
#synth filter:
samples = synth_filter(lpctrack.times, lpctrack.values,
residual.astype(np.float), SAMPLERATE)
#save in utterance:
w = Waveform()
w.samplerate = SAMPLERATE
w.samples = samples.astype("int16") #16bit samples
w.channels = 1
utt["waveform"] = w
return utt
