bce832e33b5b7bf727a13c9469fdc68f7a66c806
[aubio.git] / python / tests / test_filterbank.py
1 #! /usr/bin/env python
2
3 from numpy.testing import TestCase
4 from numpy.testing import assert_equal, assert_almost_equal
5 import numpy as np
6 from aubio import cvec, filterbank, float_type
7 from utils import array_from_text_file
8
9 class aubio_filterbank_test_case(TestCase):
10
11     def test_members(self):
12         f = filterbank(40, 512)
13         assert_equal ([f.n_filters, f.win_s], [40, 512])
14
15     def test_set_coeffs(self):
16         f = filterbank(40, 512)
17         r = np.random.random([40, int(512 / 2) + 1]).astype(float_type)
18         f.set_coeffs(r)
19         assert_equal (r, f.get_coeffs())
20
21     def test_phase(self):
22         f = filterbank(40, 512)
23         c = cvec(512)
24         c.phas[:] = np.pi
25         assert_equal( f(c), 0);
26
27     def test_norm(self):
28         f = filterbank(40, 512)
29         c = cvec(512)
30         c.norm[:] = 1
31         assert_equal( f(c), 0);
32
33     def test_random_norm(self):
34         f = filterbank(40, 512)
35         c = cvec(512)
36         c.norm[:] = np.random.random((int(512 / 2) + 1,)).astype(float_type)
37         assert_equal( f(c), 0)
38
39     def test_random_coeffs(self):
40         win_s = 128
41         f = filterbank(40, win_s)
42         c = cvec(win_s)
43         r = np.random.random([40, int(win_s / 2) + 1]).astype(float_type)
44         r /= r.sum()
45         f.set_coeffs(r)
46         c.norm[:] = np.random.random((int(win_s / 2) + 1,)).astype(float_type)
47         assert_equal ( f(c) < 1., True )
48         assert_equal ( f(c) > 0., True )
49
50     def test_mfcc_coeffs(self):
51         f = filterbank(40, 512)
52         c = cvec(512)
53         f.set_mel_coeffs_slaney(44100)
54         c.norm[:] = np.random.random((int(512 / 2) + 1,)).astype(float_type)
55         assert_equal ( f(c) < 1., True )
56         assert_equal ( f(c) > 0., True )
57
58     def test_mfcc_coeffs_16000(self):
59         expected = array_from_text_file('filterbank_mfcc_16000_512.expected')
60         f = filterbank(40, 512)
61         f.set_mel_coeffs_slaney(16000)
62         assert_almost_equal ( expected, f.get_coeffs() )
63
64 class aubio_filterbank_wrong_values(TestCase):
65
66     def test_negative_window(self):
67         self.assertRaises(ValueError, filterbank, 40, -20)
68
69     def test_negative_filters(self):
70         self.assertRaises(RuntimeError, filterbank, -40, 1024)
71
72     def test_filterbank_long_cvec(self):
73         f = filterbank(40, 512)
74         with self.assertRaises(ValueError):
75             f(cvec(1024))
76
77     def test_filterbank_short_cvec(self):
78         f = filterbank(40, 512)
79         with self.assertRaises(ValueError):
80             f(cvec(256))
81
82 if __name__ == '__main__':
83     from nose2 import main
84     main()
85