#! /usr/bin/env python """A brute force test using `sink` to create and write samples to a stereofile, then `source` to check the correct content is read from the files.""" import os.pathimport unittestimport aubioimport numpy as npfrom numpy.testing import assert_equalfrom utils import get_tmp_sink_path class aubio_source_test_case(unittest.TestCase):     def test_read_from_mono(self):        out = get_tmp_sink_path()        samplerate = 44100        hop_size = 256        blocks = 10        channels = 1        write_samples = np.ones([channels, hop_size], dtype=aubio.float_type)        write_samples *= .5        self.check_write_and_read(samplerate, channels, hop_size, blocks,                write_samples)     def test_read_from_stereo(self):        out = get_tmp_sink_path()        samplerate = 44100        hop_size = 256        blocks = 10        channels = 1        write_samples = np.ones([channels, hop_size], dtype=aubio.float_type)        write_samples *= .5        self.check_write_and_read(samplerate, channels, hop_size, blocks,                write_samples)     def test_read_from_half_stereo(self):        samplerate = 16000        channels = 2        hop_size = 512        blocks = 10        write_samples = np.ones([channels, hop_size], dtype=aubio.float_type)        write_samples *= .5        write_samples[1, :] = 0        self.check_write_and_read(samplerate, channels, hop_size, blocks,                write_samples)     def test_read_from_cancelling_channels(self):        samplerate = 16000        channels = 2        hop_size = 512        blocks = 10        write_samples = np.ones([channels, hop_size], dtype=aubio.float_type)        write_samples *= .5        write_samples[1] *= -1        self.check_write_and_read(samplerate, channels, hop_size, blocks,                write_samples)     def test_read_from_strange_three_channels(self):        samplerate = 8000        channels = 3        hop_size = 123        blocks = 10        write_samples = np.ones([channels, hop_size], dtype=aubio.float_type)        write_samples *= .5        write_samples[1, :] = 0        self.check_write_and_read(samplerate, channels, hop_size, blocks,                write_samples)     def check_write_and_read(self, samplerate, channels,            hop_size, blocks, write_samples):        expected_mono = np.sum(write_samples, axis=0)/write_samples.shape[0]        out = get_tmp_sink_path()        snk = aubio.sink(out, samplerate, channels=channels)        for i in range(blocks):            snk.do_multi(write_samples, hop_size)        # close the sink before reading from it        snk.close()         src = aubio.source(out, samplerate, hop_size)        for i in range(blocks):            read_samples, read = src.do_multi()            assert_equal (read_samples, write_samples)            assert_equal (read, hop_size)         src.seek(0)        for i in range(blocks):            read_samples, read = src()            assert_equal (read, hop_size)            assert_equal (read_samples, expected_mono) if __name__ == '__main__':    unittest.main()