def test_py_c_equal(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
audio = audio[0:4096]
frame_size = 512
hop_size = 512
py_odf = LPSpectralDifferenceODF()
py_odf.set_frame_size(frame_size)
py_odf.set_hop_size(hop_size)
py_odf.set_order(self.order)
c_odf = CLPSpectralDifferenceODF()
c_odf.set_frame_size(frame_size)
c_odf.set_hop_size(hop_size)
c_odf.set_order(self.order)
# if necessary, pad the input signal
if len(audio) % hop_size != 0:
audio = np.hstack((audio, np.zeros(hop_size - (len(audio) % hop_size),
dtype=np.double)))
# get odf samples
odf_size = len(audio) / hop_size
py_samples = np.zeros(odf_size, dtype=np.double)
c_samples = np.zeros(odf_size, dtype=np.double)
py_odf.process(audio, py_samples)
c_odf.process(audio, c_samples)
assert len(py_samples) == len(c_samples)
for i in range(len(py_samples)):
assert_almost_equals(py_samples[i], c_samples[i],
places=self.FLOAT_PRECISION)
def test_find_peaks(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
frame_size = 1024
window = np.hanning(frame_size)
frame = audio[0:frame_size] * window
spectrum = np.fft.rfft(frame)
pd = mq.MQPeakDetection(self.max_peaks, sampling_rate, frame_size)
py_peaks = pd.find_peaks(spectrum)
py_peaks = [p.bin_number for p in py_peaks]
mq_params = cdf.MQParameters()
mq_params.max_peaks = self.max_peaks
mq_params.frame_size = frame_size
mq_params.num_bins = int(frame_size / 2) + 1
mq_params.peak_threshold = 0.1
mq_params.matching_interval = 100.0
mq_params.fundamental = float(sampling_rate / frame_size)
cdf.init_mq(mq_params)
c_peaks = cdf.find_peaks(audio[0:frame_size], mq_params)
cdf.destroy_mq(mq_params)
num_peaks = 0
current_peak = c_peaks
while current_peak:
num_peaks += 1
current_peak = current_peak.next
assert len(py_peaks) == num_peaks
current_peak = c_peaks
for i in range(len(py_peaks)):
assert py_peaks[i] == current_peak.peak.bin
current_peak = current_peak.next
cdf.delete_peak_list(c_peaks)
def test_py_c_equal_rt(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
audio = audio[0:4096]
frame_size = 256
hop_size = 256
py_odf = EnergyODF()
py_odf.set_frame_size(frame_size)
py_odf.set_hop_size(hop_size)
c_odf = CEnergyODF()
c_odf.set_frame_size(frame_size)
c_odf.set_hop_size(hop_size)
# if necessary, pad the input signal
if len(audio) % hop_size != 0:
audio = np.hstack((
audio, np.zeros(hop_size - (len(audio) % hop_size),
dtype=np.double)
))
# get odf samples
audio_pos = 0
while audio_pos <= len(audio) - frame_size:
frame = audio[audio_pos:audio_pos + frame_size]
py_odf_value = py_odf.process_frame(frame)
c_odf_value = c_odf.process_frame(frame)
assert_almost_equals(py_odf_value, c_odf_value,
places=self.FLOAT_PRECISION)
audio_pos += hop_size
def test_py_c_equal(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
audio = audio[0:4096]
frame_size = 512
hop_size = 512
py_odf = LPEnergyODF()
py_odf.set_frame_size(frame_size)
py_odf.set_hop_size(hop_size)
py_odf.set_order(self.order)
c_odf = CLPEnergyODF()
c_odf.set_frame_size(frame_size)
c_odf.set_hop_size(hop_size)
c_odf.set_order(self.order)
# if necessary, pad the input signal
if len(audio) % hop_size != 0:
audio = np.hstack((audio,
np.zeros(hop_size - (len(audio) % hop_size),
dtype=np.double)))
# get odf samples
odf_size = len(audio) / hop_size
py_samples = np.zeros(odf_size, dtype=np.double)
c_samples = np.zeros(odf_size, dtype=np.double)
py_odf.process(audio, py_samples)
c_odf.process(audio, c_samples)
assert len(py_samples) == len(c_samples)
for i in range(len(py_samples)):
assert_almost_equals(py_samples[i],
c_samples[i],
places=self.FLOAT_PRECISION)
def test_py_c_equal_rt(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
audio = audio[0:4096]
frame_size = 256
hop_size = 256
py_odf = EnergyODF()
py_odf.set_frame_size(frame_size)
py_odf.set_hop_size(hop_size)
c_odf = CEnergyODF()
c_odf.set_frame_size(frame_size)
c_odf.set_hop_size(hop_size)
# if necessary, pad the input signal
if len(audio) % hop_size != 0:
audio = np.hstack((audio,
np.zeros(hop_size - (len(audio) % hop_size),
dtype=np.double)))
# get odf samples
audio_pos = 0
while audio_pos <= len(audio) - frame_size:
frame = audio[audio_pos:audio_pos + frame_size]
py_odf_value = py_odf.process_frame(frame)
c_odf_value = c_odf.process_frame(frame)
assert_almost_equals(py_odf_value,
c_odf_value,
places=self.FLOAT_PRECISION)
audio_pos += hop_size
def test_track_peaks(self):
audio, sampling_rate, onsets = modal.get_audio_file('piano_G2.wav')
frame_size = 1024
hop_size = 512
num_frames = 9
window = np.hanning(frame_size)
pd = mq.MQPeakDetection(self.max_peaks, sampling_rate, frame_size)
pt = mq.MQPartialTracking(self.max_peaks)
mq_params = cdf.MQParameters()
mq_params.max_peaks = self.max_peaks
mq_params.frame_size = frame_size
mq_params.num_bins = int(frame_size / 2) + 1
mq_params.peak_threshold = 0.1
mq_params.matching_interval = 200.0
mq_params.fundamental = float(sampling_rate / frame_size)
cdf.init_mq(mq_params)
for i in range(num_frames):
frame = audio[i * hop_size:(i * hop_size) + frame_size]
spectrum = np.fft.rfft(frame * window)
py_peaks = pd.find_peaks(spectrum)
py_partial = pt.track_peaks(py_peaks)
c_peaks = cdf.find_peaks(frame, mq_params)
c_partial = cdf.track_peaks(c_peaks, mq_params)
current_peak = c_partial
current_peak = c_partial
for peak in py_partial:
if peak.prev_peak:
assert_almost_equals(peak.prev_peak.frequency,
current_peak.peak.prev.frequency,
places=self.FLOAT_PRECISION)
else:
assert current_peak.peak.prev == None
assert_almost_equals(peak.frequency,
current_peak.peak.frequency,
places=self.FLOAT_PRECISION)
current_peak = current_peak.next
cdf.destroy_mq(mq_params)
