python/tests/test_filterbank_mel.py

   1 #! /usr/bin/env python
   2
   3 import numpy as np
   4 from numpy.testing import TestCase, assert_equal, assert_almost_equal
   5
   6 from aubio import fvec, cvec, filterbank, float_type
   7
   8 import warnings
   9 warnings.filterwarnings('ignore', category=UserWarning, append=True)
  10
  11 class aubio_filterbank_mel_test_case(TestCase):
  12
  13     def test_slaney(self):
  14         f = filterbank(40, 512)
  15         f.set_mel_coeffs_slaney(16000)
  16         a = f.get_coeffs()
  17         assert_equal(np.shape (a), (40, 512/2 + 1) )
  18
  19     def test_other_slaney(self):
  20         f = filterbank(40, 512*2)
  21         f.set_mel_coeffs_slaney(44100)
  22         self.assertIsInstance(f.get_coeffs(), np.ndarray)
  23         #print "sum is", sum(sum(a))
  24         for win_s in [256, 512, 1024, 2048, 4096]:
  25             f = filterbank(40, win_s)
  26             f.set_mel_coeffs_slaney(32000)
  27             #print "sum is", sum(sum(a))
  28             self.assertIsInstance(f.get_coeffs(), np.ndarray)
  29
  30     def test_triangle_freqs_zeros(self):
  31         f = filterbank(9, 1024)
  32         freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
  33         freqs = np.array(freq_list, dtype = float_type)
  34         f.set_triangle_bands(freqs, 48000)
  35         assert_equal ( f(cvec(1024)), 0)
  36         self.assertIsInstance(f.get_coeffs(), np.ndarray)
  37
  38     def test_triangle_freqs_ones(self):
  39         f = filterbank(9, 1024)
  40         freq_list = [40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000, 24000]
  41         freqs = np.array(freq_list, dtype = float_type)
  42         f.set_triangle_bands(freqs, 48000)
  43         self.assertIsInstance(f.get_coeffs(), np.ndarray)
  44         spec = cvec(1024)
  45         spec.norm[:] = 1
  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])
  49
  50     def test_triangle_freqs_with_zeros(self):
  51         """make sure set_triangle_bands works when list starts with 0"""
  52         freq_list = [0, 40, 80]
  53         freqs = np.array(freq_list, dtype = float_type)
  54         f = filterbank(len(freqs)-2, 1024)
  55         f.set_triangle_bands(freqs, 48000)
  56         assert_equal ( f(cvec(1024)), 0)
  57         self.assertIsInstance(f.get_coeffs(), np.ndarray)
  58
  59     def test_triangle_freqs_with_wrong_negative(self):
  60         """make sure set_triangle_bands fails when list contains a negative"""
  61         freq_list = [-10, 0, 80]
  62         f = filterbank(len(freq_list)-2, 1024)
  63         with self.assertRaises(ValueError):
  64             f.set_triangle_bands(fvec(freq_list), 48000)
  65
  66     def test_triangle_freqs_with_wrong_ordering(self):
  67         """make sure set_triangle_bands fails when list not ordered"""
  68         freq_list = [0, 80, 40]
  69         f = filterbank(len(freq_list)-2, 1024)
  70         with self.assertRaises(ValueError):
  71             f.set_triangle_bands(fvec(freq_list), 48000)
  72
  73     def test_triangle_freqs_with_large_freq(self):
  74         """make sure set_triangle_bands warns when freq > nyquist"""
  75         samplerate = 22050
  76         freq_list = [0, samplerate//4, samplerate // 2 + 1]
  77         f = filterbank(len(freq_list)-2, 1024)
  78         # TODO add assert_warns
  79         f.set_triangle_bands(fvec(freq_list), samplerate)
  80
  81     def test_triangle_freqs_with_not_enough_filters(self):
  82         """make sure set_triangle_bands warns when not enough filters"""
  83         samplerate = 22050
  84         freq_list = [0, 100, 1000, 4000, 8000, 10000]
  85         f = filterbank(len(freq_list)-3, 1024)
  86         # TODO add assert_warns
  87         f.set_triangle_bands(fvec(freq_list), samplerate)
  88
  89     def test_triangle_freqs_with_too_many_filters(self):
  90         """make sure set_triangle_bands warns when too many filters"""
  91         samplerate = 22050
  92         freq_list = [0, 100, 1000, 4000, 8000, 10000]
  93         f = filterbank(len(freq_list)-1, 1024)
  94         # TODO add assert_warns
  95         f.set_triangle_bands(fvec(freq_list), samplerate)
  96
  97     def test_triangle_freqs_with_double_value(self):
  98         """make sure set_triangle_bands works with 2 duplicate freqs"""
  99         samplerate = 22050
 100         freq_list = [0, 100, 1000, 4000, 4000, 4000, 10000]
 101         f = filterbank(len(freq_list)-2, 1024)
 102         # TODO add assert_warns
 103         f.set_triangle_bands(fvec(freq_list), samplerate)
 104
 105     def test_triangle_freqs_with_triple(self):
 106         """make sure set_triangle_bands works with 3 duplicate freqs"""
 107         samplerate = 22050
 108         freq_list = [0, 100, 1000, 4000, 4000, 4000, 10000]
 109         f = filterbank(len(freq_list)-2, 1024)
 110         # TODO add assert_warns
 111         f.set_triangle_bands(fvec(freq_list), samplerate)
 112
 113     def test_triangle_freqs_without_norm(self):
 114         """make sure set_triangle_bands works without """
 115         samplerate = 22050
 116         freq_list = fvec([0, 100, 1000, 10000])
 117         f = filterbank(len(freq_list) - 2, 1024)
 118         f.set_norm(0)
 119         f.set_triangle_bands(freq_list, samplerate)
 120         expected = f.get_coeffs()
 121         f.set_norm(1)
 122         f.set_triangle_bands(fvec(freq_list), samplerate)
 123         assert_almost_equal(f.get_coeffs().T,
 124                 expected.T * 2. / (freq_list[2:] - freq_list[:-2]))
 125
 126     def test_triangle_freqs_wrong_norm(self):
 127         f = filterbank(10, 1024)
 128         with self.assertRaises(ValueError):
 129             f.set_norm(-1)
 130
 131     def test_triangle_freqs_with_power(self):
 132         f = filterbank(9, 1024)
 133         freqs = fvec([40, 80, 200, 400, 800, 1600, 3200, 6400, 12800, 15000,
 134             24000])
 135         f.set_power(2)
 136         f.set_triangle_bands(freqs, 48000)
 137         spec = cvec(1024)
 138         spec.norm[:] = .1
 139         expected = fvec([0.02070313, 0.02138672, 0.02127604, 0.02135417,
 140             0.02133301, 0.02133301, 0.02133311, 0.02133334, 0.02133345])
 141         expected /= 100.
 142         assert_almost_equal(f(spec), expected)
 143
 144     def test_mel_coeffs(self):
 145         f = filterbank(40, 1024)
 146         f.set_mel_coeffs(44100, 0, 44100 / 2)
 147
 148     def test_zero_fmax(self):
 149         f = filterbank(40, 1024)
 150         f.set_mel_coeffs(44100, 0, 0)
 151
 152     def test_wrong_mel_coeffs(self):
 153         f = filterbank(40, 1024)
 154         with self.assertRaises(ValueError):
 155             f.set_mel_coeffs_slaney(0)
 156         with self.assertRaises(ValueError):
 157             f.set_mel_coeffs(44100, 0, -44100 / 2)
 158         with self.assertRaises(ValueError):
 159             f.set_mel_coeffs(44100, -0.1, 44100 / 2)
 160         with self.assertRaises(ValueError):
 161             f.set_mel_coeffs(-44100, 0.1, 44100 / 2)
 162         with self.assertRaises(ValueError):
 163             f.set_mel_coeffs_htk(-1, 0, 0)
 164
 165     def test_mel_coeffs_htk(self):
 166         f = filterbank(40, 1024)
 167         f.set_mel_coeffs_htk(44100, 0, 44100 / 2)
 168
 169
 170 if __name__ == '__main__':
 171     import nose2
 172     nose2.main()