source: python/tests/test_pitch.py @ 51b5f9c

feature/autosinkfeature/constantqfeature/pitchshiftfeature/timestretch
Last change on this file since 51b5f9c was 48a0e5a, checked in by Paul Brossier <piem@piem.org>, 14 months ago

[tests] protect local variables to allow running with pytest

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File size: 4.5 KB
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1#! /usr/bin/env python
2
3from numpy.testing import TestCase, assert_equal
4from numpy import sin, arange, mean, median, isnan, pi
5from aubio import fvec, pitch, freqtomidi, float_type
6
7class aubio_pitch_Good_Values(TestCase):
8
9    def skip_test_new_default(self):
10        " creating a pitch object without parameters "
11        p = pitch()
12        assert_equal ( [p.method, p.buf_size, p.hop_size, p.samplerate],
13            ['default', 1024, 512, 44100])
14
15    def test_run_on_silence(self):
16        " creating a pitch object with parameters "
17        p = pitch('default', 2048, 512, 32000)
18        assert_equal ( [p.method, p.buf_size, p.hop_size, p.samplerate],
19            ['default', 2048, 512, 32000])
20
21    def test_run_on_zeros(self):
22        " running on silence gives 0 "
23        p = pitch('default', 2048, 512, 32000)
24        f = fvec (512)
25        for _ in range(10): assert_equal (p(f), 0.)
26
27    def test_run_on_ones(self):
28        " running on ones gives 0 "
29        p = pitch('default', 2048, 512, 32000)
30        f = fvec (512)
31        f[:] = 1
32        for _ in range(10): assert_equal (p(f), 0.)
33
34class aubio_pitch_Sinusoid(TestCase):
35
36    def run_pitch_on_sinusoid(self, method, buf_size, hop_size, samplerate, freq):
37        # create pitch object
38        p = pitch(method, buf_size, hop_size, samplerate)
39        # duration in seconds
40        seconds = .3
41        # duration in samples
42        duration =  seconds * samplerate
43        # increase to the next multiple of hop_size
44        duration = duration - duration % hop_size + hop_size;
45        # build sinusoid
46        sinvec = self.build_sinusoid(duration, freq, samplerate)
47
48        self.run_pitch(p, sinvec, freq)
49
50    def build_sinusoid(self, length, freq, samplerate):
51        return sin( 2. * pi * arange(length).astype(float_type) * freq / samplerate)
52
53    def run_pitch(self, p, input_vec, freq):
54        pitches, errors = [], []
55        input_blocks = input_vec.reshape((-1, p.hop_size))
56        for new_block in input_blocks:
57            pitch = p(new_block)[0]
58            pitches.append(pitch)
59            errors.append(1. - freqtomidi(pitch) / freqtomidi(freq))
60        assert_equal ( len(input_blocks), len(pitches) )
61        assert_equal ( isnan(pitches), False )
62        # cut the first candidates
63        #cut = ( p.buf_size - p.hop_size ) / p.hop_size
64        pitches = pitches[2:]
65        errors = errors[2:]
66        # check that the mean of all relative errors is less than 10%
67        #assert abs (mean(errors) ) < 0.1, pitches
68        assert abs (median(errors) ) < 0.06, "median of relative errors is bigger than 0.06 (%f)\n found %s\n errors %s" % (mean(errors), pitches, errors)
69        #print 'len(pitches), cut:', len(pitches), cut
70        #print 'median errors: ', median(errors), 'median pitches: ', median(pitches)
71
72pitch_algorithms = [ "default", "yinfft", "yin", "yinfast", "schmitt", "mcomb", "fcomb" , "specacf" ]
73pitch_algorithms = [ "default", "yinfft", "yin", "yinfast", "schmitt", "mcomb", "fcomb" ]
74
75#freqs = [ 27.5, 55., 110., 220., 440., 880., 1760., 3520. ]
76freqs = [             110., 220., 440., 880., 1760., 3520. ]
77signal_modes = []
78for freq in freqs:
79    signal_modes += [
80        ( 4096,  2048, 44100, freq ),
81        ( 2048,  512, 44100, freq ),
82        ( 2048, 1024, 44100, freq ),
83        ( 2048, 1024, 32000, freq ),
84        ]
85
86freqs = [ ] #55., 110., 220., 440., 880., 1760., 3520. ]
87for freq in freqs:
88    signal_modes += [
89        ( 2048, 1024, 22050, freq ),
90        ( 1024,  256, 16000, freq ),
91        ( 1024,  256, 8000,  freq ),
92        ( 1024, 512+256, 8000, freq ),
93        ]
94
95"""
96signal_modes = [
97        ( 4096,  512, 44100, 2.*882. ),
98        ( 4096,  512, 44100, 882. ),
99        ( 4096,  512, 44100, 440. ),
100        ( 2048,  512, 44100, 440. ),
101        ( 2048, 1024, 44100, 440. ),
102        ( 2048, 1024, 44100, 440. ),
103        ( 2048, 1024, 32000, 440. ),
104        ( 2048, 1024, 22050, 440. ),
105        ( 1024,  256, 16000, 440. ),
106        ( 1024,  256, 8000,  440. ),
107        ( 1024, 512+256, 8000, 440. ),
108        ]
109"""
110
111def create_test (algo, mode):
112    def do_test_pitch(self):
113        self.run_pitch_on_sinusoid(algo, mode[0], mode[1], mode[2], mode[3])
114    return do_test_pitch
115
116for algo in pitch_algorithms:
117    for mode in signal_modes:
118        _test_method = create_test (algo, mode)
119        _test_method.__name__ = 'test_pitch_%s_%d_%d_%dHz_sin_%.0f' % ( algo,
120                mode[0], mode[1], mode[2], mode[3] )
121        setattr (aubio_pitch_Sinusoid, _test_method.__name__, _test_method)
122
123if __name__ == '__main__':
124    from unittest import main
125    main()
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