4 from numpy.testing import TestCase, assert_equal, assert_almost_equal
5 from _tools import assert_warns
7 from aubio import cvec, filterbank, float_type
9 class aubio_filterbank_mel_test_case(TestCase):
11 def test_slaney(self):
12 f = filterbank(40, 512)
13 f.set_mel_coeffs_slaney(16000)
15 assert_equal(np.shape (a), (40, 512/2 + 1) )
17 def test_other_slaney(self):
18 f = filterbank(40, 512*2)
19 f.set_mel_coeffs_slaney(44100)
20 self.assertIsInstance(f.get_coeffs(), np.ndarray)
21 #print "sum is", sum(sum(a))
22 for win_s in [256, 512, 1024, 2048, 4096]:
23 f = filterbank(40, win_s)
24 f.set_mel_coeffs_slaney(32000)
25 #print "sum is", sum(sum(a))
26 self.assertIsInstance(f.get_coeffs(), np.ndarray)
28 def test_triangle_freqs_zeros(self):
29 f = filterbank(9, 1024)
30 freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
31 freqs = np.array(freq_list, dtype = float_type)
32 with assert_warns(UserWarning):
33 f.set_triangle_bands(freqs, 48000)
34 assert_equal ( f(cvec(1024)), 0)
35 self.assertIsInstance(f.get_coeffs(), np.ndarray)
37 def test_triangle_freqs_ones(self):
38 f = filterbank(9, 1024)
39 freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
40 freqs = np.array(freq_list, dtype = float_type)
41 with assert_warns(UserWarning):
42 f.set_triangle_bands(freqs, 48000)
43 self.assertIsInstance(f.get_coeffs(), np.ndarray)
46 assert_almost_equal ( f(spec),
47 [ 0.02070313, 0.02138672, 0.02127604, 0.02135417,
48 0.02133301, 0.02133301, 0.02133311, 0.02133334, 0.02133345])
50 def test_triangle_freqs_normal(self):
51 """ create a filter with set_triangle_bands, normal mode """
52 f = filterbank(3, 1024)
53 freq_list = [100, 1000, 10000, 15000, 20000]
54 freqs = np.array(freq_list, dtype = float_type)
55 f.set_triangle_bands(freqs, 44100)
57 def test_triangle_freqs_too_long(self):
58 """ create a filter with freq_list too long """
59 f = filterbank(2, 1024)
60 freq_list = [100, 1000, 10000, 15000, 20000]
61 freqs = np.array(freq_list, dtype = float_type)
62 with assert_warns(UserWarning):
63 f.set_triangle_bands(freqs, 44100)
65 def test_triangle_freqs_too_short(self):
66 """ create a filter with freq_list too short """
67 f = filterbank(4, 1024)
68 freq_list = [100, 1000, 10000, 15000, 20000]
69 freqs = np.array(freq_list, dtype = float_type)
70 with assert_warns(UserWarning):
71 f.set_triangle_bands(freqs, 44100)
73 def test_above_nyquist(self):
74 """ create a filter with freq_list too short """
75 f = filterbank(3, 1024)
76 freq_list = [100, 1000, 10000, 15000, 23000]
77 freqs = np.array(freq_list, dtype = float_type)
78 with assert_warns(UserWarning):
79 f.set_triangle_bands(freqs, 44100)
81 if __name__ == '__main__':
82 from unittest import main