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- from test import test_support
- test_support.requires('audio')
-
- from test.test_support import verbose, findfile, TestFailed, TestSkipped
-
- import errno
- import fcntl
- import ossaudiodev
- import os
- import sys
- import select
- import sunaudio
- import time
- import audioop
-
- # Arggh, AFMT_S16_NE not defined on all platforms -- seems to be a
- # fairly recent addition to OSS.
- try:
- from ossaudiodev import AFMT_S16_NE
- except ImportError:
- if sys.byteorder == "little":
- AFMT_S16_NE = ossaudiodev.AFMT_S16_LE
- else:
- AFMT_S16_NE = ossaudiodev.AFMT_S16_BE
-
-
- SND_FORMAT_MULAW_8 = 1
-
- def read_sound_file(path):
- fp = open(path, 'rb')
- size, enc, rate, nchannels, extra = sunaudio.gethdr(fp)
- data = fp.read()
- fp.close()
-
- if enc != SND_FORMAT_MULAW_8:
- print "Expect .au file with 8-bit mu-law samples"
- return
-
- # Convert the data to 16-bit signed.
- data = audioop.ulaw2lin(data, 2)
- return (data, rate, 16, nchannels)
-
-
- def play_sound_file(data, rate, ssize, nchannels):
- try:
- dsp = ossaudiodev.open('w')
- except IOError, msg:
- if msg[0] in (errno.EACCES, errno.ENODEV, errno.EBUSY):
- raise TestSkipped, msg
- raise TestFailed, msg
-
- # at least check that these methods can be invoked
- dsp.bufsize()
- dsp.obufcount()
- dsp.obuffree()
- dsp.getptr()
- dsp.fileno()
-
- # set parameters based on .au file headers
- dsp.setparameters(AFMT_S16_NE, nchannels, rate)
- t1 = time.time()
- print "playing test sound file..."
- dsp.write(data)
- dsp.close()
- t2 = time.time()
- print "elapsed time: %.1f sec" % (t2-t1)
-
- def test_setparameters():
- dsp = ossaudiodev.open("w")
-
- # Two configurations for testing:
- # config1 (8-bit, mono, 8 kHz) should work on even the most
- # ancient and crufty sound card, but maybe not on special-
- # purpose high-end hardware
- # config2 (16-bit, stereo, 44.1kHz) should work on all but the
- # most ancient and crufty hardware
- config1 = (ossaudiodev.AFMT_U8, 1, 8000)
- config2 = (AFMT_S16_NE, 2, 44100)
-
- for config in [config1, config2]:
- (fmt, channels, rate) = config
- if (dsp.setfmt(fmt) == fmt and
- dsp.channels(channels) == channels and
- dsp.speed(rate) == rate):
- break
- else:
- raise RuntimeError("unable to set audio sampling parameters: "
- "you must have really weird audio hardware")
-
- # setparameters() should be able to set this configuration in
- # either strict or non-strict mode.
- result = dsp.setparameters(fmt, channels, rate, False)
- assert result == (fmt, channels, rate), \
- "setparameters%r: returned %r" % (config + result)
- result = dsp.setparameters(fmt, channels, rate, True)
- assert result == (fmt, channels, rate), \
- "setparameters%r: returned %r" % (config + result)
-
- # Now try some configurations that are presumably bogus: eg. 300
- # channels currently exceeds even Hollywood's ambitions, and
- # negative sampling rate is utter nonsense. setparameters() should
- # accept these in non-strict mode, returning something other than
- # was requested, but should barf in strict mode.
- for config in [(fmt, 300, rate), # ridiculous nchannels
- (fmt, -5, rate), # impossible nchannels
- (fmt, channels, -50), # impossible rate
- ]:
- (fmt, channels, rate) = config
- result = dsp.setparameters(fmt, channels, rate, False)
- assert result != config, \
- "setparameters: unexpectedly got requested configuration"
-
- try:
- result = dsp.setparameters(fmt, channels, rate, True)
- raise AssertionError("setparameters: expected OSSAudioError")
- except ossaudiodev.OSSAudioError, err:
- print "setparameters: got OSSAudioError as expected"
-
- def test():
- (data, rate, ssize, nchannels) = read_sound_file(findfile('audiotest.au'))
- play_sound_file(data, rate, ssize, nchannels)
- test_setparameters()
-
- test()
-