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# encoding: utf-8 | ||
# pylint: skip-file | ||
""" | ||
This file contains tests for the madmom.audio.cepstrogram module. | ||
""" | ||
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from __future__ import absolute_import, division, print_function | ||
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import unittest | ||
from functools import partial | ||
from os.path import join as pj | ||
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from madmom.audio.cepstrogram import MFCC, Cepstrogram | ||
from madmom.audio.filters import MelFilterbank | ||
from madmom.audio.spectrogram import * | ||
from . import AUDIO_PATH | ||
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sample_file = pj(AUDIO_PATH, 'sample.wav') | ||
sample_file_22050 = pj(AUDIO_PATH, 'sample_22050.wav') | ||
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class TestMFCCClass(unittest.TestCase): | ||
def test_types(self): | ||
result = MFCC(sample_file) | ||
self.assertIsInstance(result, MFCC) | ||
self.assertIsInstance(result, Cepstrogram) | ||
# attributes | ||
self.assertIsInstance(result.filterbank, MelFilterbank) | ||
# properties | ||
self.assertIsInstance(result.deltas, np.ndarray) | ||
self.assertIsInstance(result.deltadeltas, np.ndarray) | ||
self.assertIsInstance(result.num_bins, int) | ||
self.assertIsInstance(result.num_frames, int) | ||
# wrong filterbank type | ||
with self.assertRaises(TypeError): | ||
FilteredSpectrogram(sample_file, filterbank='bla') | ||
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def test_values(self): | ||
# from file | ||
result = MFCC(sample_file) | ||
allclose = partial(np.allclose, rtol=1.e-3, atol=1.e-5) | ||
self.assertTrue(allclose(result[0, :6], | ||
[-3.61102366, 6.81075716, 2.55457568, | ||
1.88377929, 1.04133379, 0.6382336])) | ||
self.assertTrue(allclose(result[0, -6:], | ||
[-0.20386486, -0.18468723, -0.00233107, | ||
0.20703268, 0.21419463, 0.00598407])) | ||
# attributes | ||
self.assertTrue(result.shape == (281, 30)) | ||
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# properties | ||
self.assertEqual(result.num_bins, 30) | ||
self.assertEqual(result.num_frames, 281) | ||
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def test_deltas(self): | ||
# from file | ||
result = MFCC(sample_file) | ||
allclose = partial(np.allclose, rtol=1.e-2, atol=1.e-4) | ||
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# don't compare first element because it is dependent on the | ||
# padding used for filtering | ||
self.assertTrue(allclose(result.deltas[1, :6], | ||
[-0.02286286, -0.11329014, 0.05381977, | ||
0.10438456, 0.04268386, -0.06839912])) | ||
self.assertTrue(allclose(result.deltas[1, -6:], | ||
[-0.03156065, -0.019716, -0.03417692, | ||
-0.07768068, -0.05539324, -0.02616282])) | ||
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self.assertTrue(allclose(result.deltadeltas[1, :6], | ||
[-0.00804922, -0.009922, -0.00454391, | ||
0.0038989, 0.00254525, 0.0120557])) | ||
self.assertTrue(allclose(result.deltadeltas[1, -6:], | ||
[0.0072148, 0.00094424, 0.00029913, | ||
0.00530994, 0.00184207, -0.00276511])) |