source: python/tests/test_pitchshift.py @ 7d01fdf

feature/pitchshiftfeature/timestretchpitchshiftsamplertimestretch
Last change on this file since 7d01fdf was 7d01fdf, checked in by Paul Brossier <piem@piem.org>, 4 years ago

python/tests/test_pitchshift.py: get message from aubio.pitchshift

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File size: 3.4 KB
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1#! /usr/bin/env python
2
3from numpy.testing import TestCase
4from nose2.tools import params
5import numpy as np
6import aubio
7
8class aubio_pitchshift(TestCase):
9
10    def setUp(self):
11        try:
12            self.o = aubio.pitchshift(hop_size = 128)
13        except RuntimeError as e:
14            self.skipTest("creating aubio.pitchshift {}".format(e))
15
16    def test_default_creation(self):
17        self.assertEqual(self.o.get_pitchscale(), 1)
18        self.assertEqual(self.o.get_transpose(), 0)
19
20    def test_on_zeros(self):
21        test_length = self.o.hop_size * 100
22        read = 0
23        # test on zeros
24        vec = aubio.fvec(self.o.hop_size)
25        transpose_range = 24
26        while read < test_length:
27            # transpose the samples
28            out = self.o(vec)
29            self.assertTrue((out == 0).all())
30            # position in the file (between 0. and 1.)
31            percent_read = read / float(test_length)
32            # variable transpose rate (in semitones)
33            transpose = 2 * transpose_range * percent_read - transpose_range
34            # set transpose rate
35            self.o.set_transpose(transpose)
36            read += len(vec)
37
38    def test_on_ones(self):
39        test_length = self.o.hop_size * 100
40        read = 0
41        # test on zeros
42        vec = aubio.fvec(self.o.hop_size) + 1
43        transpose_range = 1.24
44        while read < test_length:
45            # transpose the samples
46            out = self.o(vec)
47            # position in the file (between 0. and 1.)
48            percent_read = read / float(test_length)
49            # variable transpose rate (in semitones)
50            transpose = 2 * transpose_range * percent_read - transpose_range
51            # set transpose rate
52            self.o.set_transpose(transpose)
53            read += len(vec)
54
55    def test_transpose_too_high(self):
56        with self.assertRaises(ValueError):
57            self.o.set_transpose(24.3)
58
59    def test_transpose_too_low(self):
60        with self.assertRaises(ValueError):
61            self.o.set_transpose(-24.3)
62
63class aubio_pitchshift_wrong_params(TestCase):
64
65    def test_wrong_transpose(self):
66        with self.assertRaises(RuntimeError):
67            aubio.pitchshift("default", -123)
68
69class aubio_pitchshift_testruns(TestCase):
70
71    @params(
72            ("default",     1.2,  128,  44100),
73            ("crispness:0", 0.43,  64,   8000),
74            ("crispness:3", 0.53, 256,   8000),
75            ("crispness:3", 1.53, 512,   8000),
76            ("crispness:6", 2.3, 4096, 192000),
77            )
78    def test_run_with_params(self, mode, pitchscale, hop_size, samplerate):
79        try:
80            self.o = aubio.pitchshift(mode, pitchscale, hop_size, samplerate)
81        except RuntimeError as e:
82            self.skipTest("failed creating pitchshift ({})".format(e))
83        test_length = self.o.hop_size * 50
84        read = 0
85        # test on random
86        vec = np.random.rand(self.o.hop_size).astype(aubio.float_type)
87        transpose_range = self.o.get_transpose()
88        while read < test_length:
89            # transpose the samples
90            out = self.o(vec)
91            # position in the file (between 0. and 1.)
92            percent_read = read / float(test_length)
93            # variable transpose rate (in semitones)
94            transpose =  transpose_range - 2 * transpose_range * percent_read
95            # set transpose rate
96            self.o.set_transpose(transpose)
97            read += len(vec)
98
99if __name__ == '__main__':
100    from nose2 import main
101    main()
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