4 from numpy.testing import TestCase, assert_equal, assert_almost_equal
5 from _tools import assert_warns
7 from aubio import fvec, 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 def test_triangle_freqs_with_zeros(self):
82 """make sure set_triangle_bands works when list starts with 0"""
83 freq_list = [0, 40, 80]
84 freqs = np.array(freq_list, dtype = float_type)
85 f = filterbank(len(freqs)-2, 1024)
86 f.set_triangle_bands(freqs, 48000)
87 assert_equal ( f(cvec(1024)), 0)
88 self.assertIsInstance(f.get_coeffs(), np.ndarray)
90 def test_triangle_freqs_with_wrong_negative(self):
91 """make sure set_triangle_bands fails when list contains a negative"""
92 freq_list = [-10, 0, 80]
93 f = filterbank(len(freq_list)-2, 1024)
94 with self.assertRaises(ValueError):
95 f.set_triangle_bands(fvec(freq_list), 48000)
97 def test_triangle_freqs_with_wrong_ordering(self):
98 """make sure set_triangle_bands fails when list not ordered"""
99 freq_list = [0, 80, 40]
100 f = filterbank(len(freq_list)-2, 1024)
101 with self.assertRaises(ValueError):
102 f.set_triangle_bands(fvec(freq_list), 48000)
104 def test_triangle_freqs_with_large_freq(self):
105 """make sure set_triangle_bands warns when freq > nyquist"""
107 freq_list = [0, samplerate//4, samplerate // 2 + 1]
108 f = filterbank(len(freq_list)-2, 1024)
109 # TODO add assert_warns
110 f.set_triangle_bands(fvec(freq_list), samplerate)
112 def test_triangle_freqs_with_not_enough_filters(self):
113 """make sure set_triangle_bands warns when not enough filters"""
115 freq_list = [0, 100, 1000, 4000, 8000, 10000]
116 f = filterbank(len(freq_list)-3, 1024)
117 # TODO add assert_warns
118 f.set_triangle_bands(fvec(freq_list), samplerate)
120 def test_triangle_freqs_with_too_many_filters(self):
121 """make sure set_triangle_bands warns when too many filters"""
123 freq_list = [0, 100, 1000, 4000, 8000, 10000]
124 f = filterbank(len(freq_list)-1, 1024)
125 # TODO add assert_warns
126 f.set_triangle_bands(fvec(freq_list), samplerate)
128 def test_triangle_freqs_with_double_value(self):
129 """make sure set_triangle_bands works with 2 duplicate freqs"""
131 freq_list = [0, 100, 1000, 4000, 4000, 4000, 10000]
132 f = filterbank(len(freq_list)-2, 1024)
133 # TODO add assert_warns
134 f.set_triangle_bands(fvec(freq_list), samplerate)
136 def test_triangle_freqs_with_triple(self):
137 """make sure set_triangle_bands works with 3 duplicate freqs"""
139 freq_list = [0, 100, 1000, 4000, 4000, 4000, 10000]
140 f = filterbank(len(freq_list)-2, 1024)
141 # TODO add assert_warns
142 f.set_triangle_bands(fvec(freq_list), samplerate)
145 if __name__ == '__main__':
146 from unittest import main