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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() | |