def duration(infile):
"""
Returns the duration of a song in seconds.
"""
dur = standard.Duration()
audio = standard.MonoLoader(filename=infile)()
duration = dur(audio)
return duration
def OnsetsSegmentation(audio,
frame_size=1024,
frame_hop=512,
windowing_type='hann',
onsets_method='hfc'):
#declaração dos algoritmos que serão usados
spec = es_mode.Spectrum()
fft = es_mode.FFT()
c2p = es_mode.CartesianToPolar()
od1 = es_mode.OnsetDetection(method=onsets_method)
w = es_mode.Windowing(type=windowing_type)
pool = es.Pool()
#Função que será executada a cada frame
def F(n):
spectrum = spec(w(n))
mag, phase, = c2p(fft(w(n)))
pool.add('features.spectrum', spectrum)
pool.add('features.', phase)
pool.add('features.onsetdetection', od1(spectrum, phase))
#define a função contínua de onsets para cada frame
qtdFrames = inFrames(audio=audio,
algorithm=F,
frameSize=frame_size,
hopSize=frame_hop)
#print("Quantidade de frames: ", qtdFrames)
audio_duration = es_mode.Duration()(audio)
frame_rate = qtdFrames / audio_duration
os = es_mode.Onsets(frameRate=frame_rate)
#matriz de algoritmos de detecção de onset executados
onset_detection_matrix = es.array([pool['features.onsetdetection']])
#segundo parâmetro é o vetor de pesos para cada detecção de onset
onsets = os(onset_detection_matrix, [1])
end_times = es.array(np.append(onsets, audio_duration))
start_times = es.array(np.append([0], onsets))
segments = es_mode.Slicer(endTimes=end_times,
startTimes=start_times,
timeUnits="seconds")(audio)
return segments, onsets
def SuperFluxSegmentation(audio,
combine=100,
ratioThreshold=10,
threshold=0.05):
algo = es_mode.SuperFluxExtractor(combine=combine,
ratioThreshold=ratioThreshold,
threshold=threshold)
onsets = algo(audio)
end = es_mode.Duration()(audio)
end_times = es.array(np.append(onsets, end))
start_times = es.array(np.append([0], onsets))
segments = es_mode.Slicer(endTimes=end_times,
startTimes=start_times,
timeUnits="seconds")(audio)
return segments, onsets
def duration(file_in):
d = standard.Duration()
audio = standard.MonoLoader(filename=file_in)()
return d(audio)
def __get_duration__(self):
e_duration = e.Duration()
self.duration = e_duration(self.signal)