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import os
import numpy as np
from nose.tools import assert_almost_equals
import simpl
import simpl.base as base
float_precision = 5
frame_size = 512
hop_size = 512
audio_path = os.path.join(
os.path.dirname(__file__), 'audio/flute.wav'
)
class TestFrame(object):
def test_buffers(self):
N = 256
f = base.Frame(N)
assert f.size == N
a = np.random.rand(N)
f.audio = a
assert np.all(f.audio == a)
a = np.random.rand(N)
f.synth = a
assert np.all(f.synth == a)
a = np.random.rand(N)
f.residual = a
assert np.all(f.residual == a)
a = np.random.rand(N)
f.synth_residual = a
assert np.all(f.synth_residual == a)
def test_peaks(self):
p = base.Peak()
p.amplitude = 0.5
p.frequency = 220.0
p.phase = 0.0
f = base.Frame()
assert f.num_peaks == 0
assert f.max_peaks > 0
f.add_peak(p)
assert f.num_peaks == 1
assert_almost_equals(f.peak(0).amplitude, p.amplitude,
float_precision)
assert_almost_equals(f.peaks[0].amplitude, p.amplitude,
float_precision)
f.clear()
assert f.num_peaks == 0
def test_partials(self):
N = 256
f = base.Frame(N)
f.max_partials = 10
p = base.Peak()
p.amplitude = 0.5
p.frequency = 220.0
p.phase = 0.0
f.partial(0, p)
assert_almost_equals(f.partial(0).amplitude, p.amplitude,
float_precision)
assert_almost_equals(f.partial(0).frequency, p.frequency,
float_precision)
class TestPeakDetection(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
def test_peak_detection(self):
pd = base.PeakDetection()
pd.find_peaks(self.audio)
assert len(pd.frames) == len(self.audio) / hop_size
assert len(pd.frames[0].peaks) == 0
class TestPartialTracking(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
def test_partial_tracking(self):
pd = base.PeakDetection()
frames = pd.find_peaks(self.audio)
pt = base.PartialTracking()
frames = pt.find_partials(frames)
assert len(frames) == len(self.audio) / hop_size
assert len(frames[0].partials) == 100
class TestSynthesis(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
def test_synthesis(self):
pd = base.PeakDetection()
frames = pd.find_peaks(self.audio)
pt = base.PartialTracking()
frames = pt.find_partials(frames)
s = base.Synthesis()
synth_audio = s.synth(frames)
assert len(synth_audio)
class TestResidual(object):
@classmethod
def setup_class(cls):
cls.audio = simpl.read_wav(audio_path)[0]
def test_synthesis(self):
pd = base.PeakDetection()
frames = pd.find_peaks(self.audio)
pt = base.PartialTracking()
frames = pt.find_partials(frames)
s = base.Synthesis()
synth_audio = s.synth(frames)
r = base.Residual()
residual_audio = r.find_residual(synth_audio, self.audio)
assert len(residual_audio)
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