python/tests: fix most prospect warnings
[aubio.git] / python / tests / test_filterbank_mel.py
1 #! /usr/bin/env python
2
3 from unittest import main
4 from numpy.testing import TestCase
5 from numpy.testing import assert_equal, assert_almost_equal
6 from numpy import array, shape
7 from aubio import cvec, filterbank, float_type
8
9 class aubio_filterbank_mel_test_case(TestCase):
10
11     def test_slaney(self):
12         f = filterbank(40, 512)
13         f.set_mel_coeffs_slaney(16000)
14         a = f.get_coeffs()
15         assert_equal(shape (a), (40, 512/2 + 1) )
16
17     def test_other_slaney(self):
18         f = filterbank(40, 512*2)
19         f.set_mel_coeffs_slaney(44100)
20         _ = f.get_coeffs()
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             _ = f.get_coeffs()
26             #print "sum is", sum(sum(a))
27
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 = array(freq_list, dtype = float_type)
32         f.set_triangle_bands(freqs, 48000)
33         _ = f.get_coeffs().T
34         assert_equal ( f(cvec(1024)), 0)
35
36     def test_triangle_freqs_ones(self):
37         f = filterbank(9, 1024)
38         freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
39         freqs = array(freq_list, dtype = float_type)
40         f.set_triangle_bands(freqs, 48000)
41         _ = f.get_coeffs().T
42         spec = cvec(1024)
43         spec.norm[:] = 1
44         assert_almost_equal ( f(spec),
45                 [ 0.02070313, 0.02138672, 0.02127604, 0.02135417,
46                     0.02133301, 0.02133301, 0.02133311, 0.02133334, 0.02133345])
47
48 if __name__ == '__main__':
49     main()