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