def _pysms_synthesis_params(sampling_rate):
synth_params = pysms.SMS_SynthParams()
pysms.sms_initSynthParams(synth_params)
synth_params.iSamplingRate = sampling_rate
synth_params.iSynthesisType = pysms.SMS_STYPE_DET
synth_params.iStochasticType = pysms.SMS_STOC_NONE
synth_params.sizeHop = hop_size
synth_params.nTracks = max_partials
synth_params.deEmphasis = 0
return synth_params
def synthesize(frames,
sms_header,
synth_type=pysms.SMS_STYPE_ALL,
det_synth_type=pysms.SMS_DET_IFFT,
hop_size=pysms.SMS_MIN_SIZE_FRAME):
pysms.sms_init()
synth_params = pysms.SMS_SynthParams()
pysms.sms_initSynthParams(synth_params)
synth_params.iSynthesisType = synth_type
synth_params.iDetSynthType = det_synth_type
synth_params.sizeHop = hop_size
pysms.sms_initSynth(sms_header, synth_params)
interp_frame = pysms.SMS_Data()
pysms.sms_allocFrameH(sms_header, interp_frame)
synth_samples = np.zeros(synth_params.sizeHop, dtype=np.float32)
num_synth_samples = 0
target_synth_samples = len(frames) * synth_params.origSizeHop
audio_output = np.array([], dtype=np.float32)
loc_incr = 1.0 / synth_params.origSizeHop
current_frame = 0
# Synthesis loop
while num_synth_samples < target_synth_samples:
interp_factor = loc_incr * num_synth_samples
left_frame_loc = int(
min(sms_header.nFrames - 1, np.floor(interp_factor)))
if (left_frame_loc < sms_header.nFrames - 2):
right_frame_loc = left_frame_loc + 1
else:
right_frame_loc = left_frame_loc
left_frame = frames[left_frame_loc]
right_frame = frames[right_frame_loc]
pysms.sms_interpolateFrames(left_frame, right_frame, interp_frame,
interp_factor - left_frame_loc)
pysms.sms_synthesize(interp_frame, synth_samples, synth_params)
audio_output = np.hstack((audio_output, synth_samples))
num_synth_samples += synth_params.sizeHop
pysms.sms_freeFrame(interp_frame)
pysms.sms_freeSynth(synth_params)
pysms.sms_free()
return audio_output
def synthesize(frames, sms_header, synth_type=pysms.SMS_STYPE_ALL,
det_synth_type=pysms.SMS_DET_IFFT,
hop_size=pysms.SMS_MIN_SIZE_FRAME):
pysms.sms_init()
synth_params = pysms.SMS_SynthParams()
pysms.sms_initSynthParams(synth_params)
synth_params.iSynthesisType = synth_type
synth_params.iDetSynthType = det_synth_type
synth_params.sizeHop = hop_size
pysms.sms_initSynth(sms_header, synth_params)
interp_frame = pysms.SMS_Data()
pysms.sms_allocFrameH(sms_header, interp_frame)
synth_samples = np.zeros(synth_params.sizeHop, dtype=np.float32)
num_synth_samples = 0
target_synth_samples = len(frames) * synth_params.origSizeHop
audio_output = np.array([], dtype=np.float32)
loc_incr = 1.0 / synth_params.origSizeHop
current_frame = 0
# Synthesis loop
while num_synth_samples < target_synth_samples:
interp_factor = loc_incr * num_synth_samples
left_frame_loc = int(min(sms_header.nFrames - 1, np.floor(interp_factor)))
if(left_frame_loc < sms_header.nFrames - 2):
right_frame_loc = left_frame_loc + 1
else:
right_frame_loc = left_frame_loc
left_frame = frames[left_frame_loc]
right_frame = frames[right_frame_loc]
pysms.sms_interpolateFrames(left_frame, right_frame, interp_frame, interp_factor - left_frame_loc)
pysms.sms_synthesize(interp_frame, synth_samples, synth_params)
audio_output = np.hstack((audio_output, synth_samples))
num_synth_samples += synth_params.sizeHop
pysms.sms_freeFrame(interp_frame)
pysms.sms_freeSynth(synth_params)
pysms.sms_free()
return audio_output
