/Lib/test/test_linuxaudiodev.py
http://unladen-swallow.googlecode.com/ · Python · 98 lines · 79 code · 15 blank · 4 comment · 19 complexity · 79cabb98c468e12c82ab514539efa937 MD5 · raw file
- from test import test_support
- test_support.requires('audio')
- from test.test_support import findfile, TestSkipped, run_unittest
- import errno
- linuxaudiodev = test_support.import_module('linuxaudiodev', deprecated=True)
- 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()