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| 1 | #! /usr/bin/env python | ||
| 2 | |||
| 3 | from nose2 import TestCase | ||
| 4 | import aubio | ||
| 5 | |||
| 6 | class aubio_pitchshift(TestCase): | ||
| 7 | |||
| 8 | def setUp(self): | ||
| 9 | self.o = aubio.pitchshift() | ||
| 10 | |||
| 11 | def test_default_creation(self): | ||
| 12 | self.assertEqual(self.o.get_pitchscale(), 1) | ||
| 13 | self.assertEqual(self.o.get_transpose(), 0) | ||
| 14 | |||
| 15 | def test_on_zeros(self): | ||
| 16 | test_length = 20000 | ||
| 17 | read = 0 | ||
| 18 | # test on zeros | ||
| 19 | vec = aubio.fvec(512) | ||
| 20 | transpose_range = 24 | ||
| 21 | while read < test_length: | ||
| 22 | # transpose the samples | ||
| 23 | out = self.o(vec) | ||
| 24 | self.assertTrue((out == 0).all()) | ||
| 25 | # position in the file (between 0. and 1.) | ||
| 26 | percent_read = read / float(test_length) | ||
| 27 | # variable transpose rate (in semitones) | ||
| 28 | transpose = 2 * transpose_range * percent_read - transpose_range | ||
| 29 | # set transpose rate | ||
| 30 | self.o.set_transpose(transpose) | ||
| 31 | read += len(vec) | ||
| 32 | |||
| 33 | def test_transpose_too_high(self): | ||
| 34 | with self.assertRaises(ValueError): | ||
| 35 | self.o.set_transpose(24.3) | ||
| 36 | |||
| 37 | def test_transpose_too_low(self): | ||
| 38 | with self.assertRaises(ValueError): | ||
| 39 | self.o.set_transpose(-24.3) | ||
| 40 | |||
| 41 | if __name__ == '__main__': | ||
| 42 | from nose2 import main | ||
| 43 | main() | ||