ref: 228e8d80880f3258ed2ae5637afe3338eba76708
dir: /interfaces/python/test_filterbank.py/
from numpy.testing import TestCase, run_module_suite
from numpy.testing import assert_equal, assert_almost_equal
from numpy import array, shape
from aubio import cvec, filterbank
class aubio_filter_test_case(TestCase):
def test_slaney(self):
f = filterbank(40, 512)
f.set_mel_coeffs_slaney(16000)
a = f.get_coeffs()
a.T
assert_equal(shape (a), (40, 512/2 + 1) )
def test_other_slaney(self):
f = filterbank(40, 512*2)
f.set_mel_coeffs_slaney(44100)
a = f.get_coeffs()
#print "sum is", sum(sum(a))
for win_s in [256, 512, 1024, 2048, 4096]:
f = filterbank(40, win_s)
f.set_mel_coeffs_slaney(320000)
a = f.get_coeffs()
#print "sum is", sum(sum(a))
def test_triangle_freqs_zeros(self):
f = filterbank(9, 1024)
freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
freqs = array(freq_list, dtype = 'float32')
f.set_triangle_bands(freqs, 48000)
f.get_coeffs().T
assert_equal ( f(cvec(1024)), 0)
def test_triangle_freqs_ones(self):
f = filterbank(9, 1024)
freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
freqs = array(freq_list, dtype = 'float32')
f.set_triangle_bands(freqs, 48000)
f.get_coeffs().T
spec = cvec(1024)
spec.norm[:] = 1
assert_almost_equal ( f(spec),
[ 0.02070313, 0.02138672, 0.02127604, 0.02135417,
0.02133301, 0.02133301, 0.02133311, 0.02133334, 0.02133345])
if __name__ == '__main__':
from unittest import main
main()