from test import test_support test_support.requires('audio') from test.test_support import findfile, TestSkipped, run_unittest import errno import linuxaudiodev import sys import sunaudio import audioop import unittest SND_FORMAT_MULAW_8 = 1 class LinuxAudioDevTests(unittest.TestCase): def setUp(self): self.dev = linuxaudiodev.open('w') def tearDown(self): self.dev.close() def test_methods(self): # at least check that these methods can be invoked self.dev.bufsize() self.dev.obufcount() self.dev.obuffree() self.dev.getptr() self.dev.fileno() def test_play_sound_file(self): path = findfile("audiotest.au") fp = open(path, 'r') size, enc, rate, nchannels, extra = sunaudio.gethdr(fp) data = fp.read() fp.close() if enc != SND_FORMAT_MULAW_8: self.fail("Expect .au file with 8-bit mu-law samples") # convert the data to 16-bit signed data = audioop.ulaw2lin(data, 2) # set the data format if sys.byteorder == 'little': fmt = linuxaudiodev.AFMT_S16_LE else: fmt = linuxaudiodev.AFMT_S16_BE # set parameters based on .au file headers self.dev.setparameters(rate, 16, nchannels, fmt) self.dev.write(data) self.dev.flush() def test_errors(self): size = 8 fmt = linuxaudiodev.AFMT_U8 rate = 8000 nchannels = 1 try: self.dev.setparameters(-1, size, nchannels, fmt) except ValueError, err: self.assertEquals(err.args[0], "expected rate >= 0, not -1") try: self.dev.setparameters(rate, -2, nchannels, fmt) except ValueError, err: self.assertEquals(err.args[0], "expected sample size >= 0, not -2") try: self.dev.setparameters(rate, size, 3, fmt) except ValueError, err: self.assertEquals(err.args[0], "nchannels must be 1 or 2, not 3") try: self.dev.setparameters(rate, size, nchannels, 177) except ValueError, err: self.assertEquals(err.args[0], "unknown audio encoding: 177") try: self.dev.setparameters(rate, size, nchannels, linuxaudiodev.AFMT_U16_LE) except ValueError, err: self.assertEquals(err.args[0], "for linear unsigned 16-bit little-endian " "audio, expected sample size 16, not 8") try: self.dev.setparameters(rate, 16, nchannels, fmt) except ValueError, err: self.assertEquals(err.args[0], "for linear unsigned 8-bit audio, expected " "sample size 8, not 16") def test_main(): try: dsp = linuxaudiodev.open('w') except linuxaudiodev.error, msg: if msg.args[0] in (errno.EACCES, errno.ENOENT, errno.ENODEV, errno.EBUSY): raise TestSkipped(msg) raise dsp.close() run_unittest(LinuxAudioDevTests) if __name__ == '__main__': test_main()