[75e715f] | 1 | #! /usr/bin/env python |
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[5e3ed60] | 2 | |
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[0b6d23d] | 3 | from unittest import main |
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| 4 | from numpy.testing import TestCase |
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[5e3ed60] | 5 | from numpy.testing import assert_equal, assert_almost_equal |
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| 6 | from numpy import array, shape |
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[c4b2183] | 7 | from aubio import cvec, filterbank, float_type |
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[5e3ed60] | 8 | |
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| 9 | class aubio_filterbank_mel_test_case(TestCase): |
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| 10 | |
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[0b6d23d] | 11 | def test_slaney(self): |
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| 12 | f = filterbank(40, 512) |
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| 13 | f.set_mel_coeffs_slaney(16000) |
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| 14 | a = f.get_coeffs() |
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| 15 | assert_equal(shape (a), (40, 512/2 + 1) ) |
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| 16 | |
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| 17 | def test_other_slaney(self): |
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| 18 | f = filterbank(40, 512*2) |
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| 19 | f.set_mel_coeffs_slaney(44100) |
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| 20 | _ = f.get_coeffs() |
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| 21 | #print "sum is", sum(sum(a)) |
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| 22 | for win_s in [256, 512, 1024, 2048, 4096]: |
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| 23 | f = filterbank(40, win_s) |
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| 24 | f.set_mel_coeffs_slaney(32000) |
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| 25 | _ = f.get_coeffs() |
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| 26 | #print "sum is", sum(sum(a)) |
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| 27 | |
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| 28 | def test_triangle_freqs_zeros(self): |
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| 29 | f = filterbank(9, 1024) |
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| 30 | freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000] |
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| 31 | freqs = array(freq_list, dtype = float_type) |
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| 32 | f.set_triangle_bands(freqs, 48000) |
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| 33 | _ = f.get_coeffs().T |
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| 34 | assert_equal ( f(cvec(1024)), 0) |
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| 35 | |
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| 36 | def test_triangle_freqs_ones(self): |
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| 37 | f = filterbank(9, 1024) |
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| 38 | freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000] |
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| 39 | freqs = array(freq_list, dtype = float_type) |
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| 40 | f.set_triangle_bands(freqs, 48000) |
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| 41 | _ = f.get_coeffs().T |
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| 42 | spec = cvec(1024) |
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| 43 | spec.norm[:] = 1 |
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| 44 | assert_almost_equal ( f(spec), |
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| 45 | [ 0.02070313, 0.02138672, 0.02127604, 0.02135417, |
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| 46 | 0.02133301, 0.02133301, 0.02133311, 0.02133334, 0.02133345]) |
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[5e3ed60] | 47 | |
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| 48 | if __name__ == '__main__': |
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[0b6d23d] | 49 | main() |
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