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| 1 | #! /usr/bin/env python | ||
| 2 | |||
| 3 | """A brute force test using `sink` to create and write samples to a stereo | ||
| 4 | file, then `source` to check the correct content is read from the files.""" | ||
| 5 | |||
| 6 | import os.path | ||
| 7 | import unittest | ||
| 8 | import aubio | ||
| 9 | import numpy as np | ||
| 10 | from numpy.testing import assert_equal | ||
| 11 | from utils import get_tmp_sink_path | ||
| 12 | |||
| 13 | class aubio_source_test_case(unittest.TestCase): | ||
| 14 | |||
| 15 | def test_read_from_mono(self): | ||
| 16 | out = get_tmp_sink_path() | ||
| 17 | samplerate = 44100 | ||
| 18 | hop_size = 256 | ||
| 19 | blocks = 10 | ||
| 20 | channels = 1 | ||
| 21 | write_samples = np.ones([channels, hop_size], dtype=aubio.float_type) | ||
| 22 | write_samples *= .5 | ||
| 23 | self.check_write_and_read(samplerate, channels, hop_size, blocks, | ||
| 24 | write_samples) | ||
| 25 | |||
| 26 | def test_read_from_stereo(self): | ||
| 27 | out = get_tmp_sink_path() | ||
| 28 | samplerate = 44100 | ||
| 29 | hop_size = 256 | ||
| 30 | blocks = 10 | ||
| 31 | channels = 1 | ||
| 32 | write_samples = np.ones([channels, hop_size], dtype=aubio.float_type) | ||
| 33 | write_samples *= .5 | ||
| 34 | self.check_write_and_read(samplerate, channels, hop_size, blocks, | ||
| 35 | write_samples) | ||
| 36 | |||
| 37 | def test_read_from_half_stereo(self): | ||
| 38 | samplerate = 16000 | ||
| 39 | channels = 2 | ||
| 40 | hop_size = 512 | ||
| 41 | blocks = 10 | ||
| 42 | write_samples = np.ones([channels, hop_size], dtype=aubio.float_type) | ||
| 43 | write_samples *= .5 | ||
| 44 | write_samples[1, :] = 0 | ||
| 45 | self.check_write_and_read(samplerate, channels, hop_size, blocks, | ||
| 46 | write_samples) | ||
| 47 | |||
| 48 | def test_read_from_cancelling_channels(self): | ||
| 49 | samplerate = 16000 | ||
| 50 | channels = 2 | ||
| 51 | hop_size = 512 | ||
| 52 | blocks = 10 | ||
| 53 | write_samples = np.ones([channels, hop_size], dtype=aubio.float_type) | ||
| 54 | write_samples *= .5 | ||
| 55 | write_samples[1] *= -1 | ||
| 56 | self.check_write_and_read(samplerate, channels, hop_size, blocks, | ||
| 57 | write_samples) | ||
| 58 | |||
| 59 | def test_read_from_strange_three_channels(self): | ||
| 60 | samplerate = 8000 | ||
| 61 | channels = 3 | ||
| 62 | hop_size = 123 | ||
| 63 | blocks = 10 | ||
| 64 | write_samples = np.ones([channels, hop_size], dtype=aubio.float_type) | ||
| 65 | write_samples *= .5 | ||
| 66 | write_samples[1, :] = 0 | ||
| 67 | self.check_write_and_read(samplerate, channels, hop_size, blocks, | ||
| 68 | write_samples) | ||
| 69 | |||
| 70 | def check_write_and_read(self, samplerate, channels, | ||
| 71 | hop_size, blocks, write_samples): | ||
| 72 | expected_mono = np.sum(write_samples, axis=0)/write_samples.shape[0] | ||
| 73 | out = get_tmp_sink_path() | ||
| 74 | snk = aubio.sink(out, samplerate, channels=channels) | ||
| 75 | for i in range(blocks): | ||
| 76 | snk.do_multi(write_samples, hop_size) | ||
| 77 | # close the sink before reading from it | ||
| 78 | snk.close() | ||
| 79 | |||
| 80 | src = aubio.source(out, samplerate, hop_size) | ||
| 81 | for i in range(blocks): | ||
| 82 | read_samples, read = src.do_multi() | ||
| 83 | assert_equal (read_samples, write_samples) | ||
| 84 | assert_equal (read, hop_size) | ||
| 85 | |||
| 86 | src.seek(0) | ||
| 87 | for i in range(blocks): | ||
| 88 | read_samples, read = src() | ||
| 89 | assert_equal (read, hop_size) | ||
| 90 | assert_equal (read_samples, expected_mono) | ||
| 91 | |||
| 92 | if __name__ == '__main__': | ||
| 93 | unittest.main() | ||