def test_wrong_size(self):
""" test that creation fails with a non power-of-two size """
# supports for non 2** fft sizes only when compiled with fftw3
size = 13
try:
with self.assertRaises(RuntimeError):
aubio.dct(size)
except AssertionError:
self.skipTest('creating aubio.dct with size %d did not fail' % size)
def test_some_ones(self):
""" test that dct(somevector) is computed correctly """
a_dct = aubio.dct(16)
a_in = np.ones(16).astype(aubio.float_type)
a_in[1] = 0
a_in[3] = np.pi
a_expected = aubio.fvec(precomputed_some_ones)
assert_almost_equal(a_dct(a_in), a_expected, decimal=6)
def test_reconstruction(self):
""" test that some_ones vector can be recontructed """
a_dct = aubio.dct(16)
a_in = np.ones(16).astype(aubio.float_type)
a_in[1] = 0
a_in[3] = np.pi
a_dct_in = a_dct(a_in)
a_dct_reconstructed = a_dct.rdo(a_dct_in)
assert_almost_equal(a_dct_reconstructed, a_in, decimal=6)
def test_arange(self):
""" test that dct(arange(8)) is computed correctly
>>> from scipy.fftpack import dct
>>> a_in = np.arange(8).astype(aubio.float_type)
>>> precomputed = dct(a_in, norm='ortho')
"""
N = len(precomputed_arange)
a_dct = aubio.dct(8)
a_in = np.arange(8).astype(aubio.float_type)
a_expected = aubio.fvec(precomputed_arange)
assert_almost_equal(a_dct(a_in), a_expected, decimal=5)
def test_negative_size(self):
""" test that creation fails with a negative size """
with self.assertRaises(ValueError):
aubio.dct(-1)
def test_init(self):
""" test that aubio.dct() is created with expected size """
a_dct = aubio.dct()
self.assertEqual(a_dct.size, 1024)
active = 0
visualizers = [Colors()]
@window.event
def on_draw(dt):
window.clear()
visualizers[active].quad.draw(visualizers[active].method)
@window.event
def on_key_press(symbol, modifiers):
print(symbol, modifiers)
g = dct(16)
def bands(data):
bands = g(data)
return np.absolute(bands)
def audio_input_callback(indata, frames, time, status):
data = indata.transpose()[0]
visualizers[active].input(data, bands(data))
audio_input_stream = sd.InputStream(channels=1,
callback=audio_input_callback,
dtype='float32',