Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_ossaudiodev.py @ 79675:c0a2294de787 2.7

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Issue #16199: Backport 2to3 typo fix from 3.2.
author Chris Jerdonek <chris.jerdonek@gmail.com>
date Thu, 11 Oct 2012 16:15:46 -0700
parents b36cb4602e21
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
27896
4e31e4086849 - The audio driver tests (test_ossaudiodev.py and
Guido van Rossum <guido@python.org>
parents: 27154
diff changeset
1 from test import test_support
4e31e4086849 - The audio driver tests (test_ossaudiodev.py and
Guido van Rossum <guido@python.org>
parents: 27154
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2 test_support.requires('audio')
4e31e4086849 - The audio driver tests (test_ossaudiodev.py and
Guido van Rossum <guido@python.org>
parents: 27154
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3
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Benjamin Peterson <benjamin@python.org>
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4 from test.test_support import findfile
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5
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R. David Murray <rdmurray@bitdance.com>
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6 ossaudiodev = test_support.import_module('ossaudiodev')
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7
3f4383a04b62 Initial revision is rev 1.8 of test_linuxaudiodev.py, with
Greg Ward <gward@python.net>
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8 import errno
3f4383a04b62 Initial revision is rev 1.8 of test_linuxaudiodev.py, with
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9 import sys
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parents: 45468
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10 import sunau
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Greg Ward <gward@python.net>
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11 import time
3f4383a04b62 Initial revision is rev 1.8 of test_linuxaudiodev.py, with
Greg Ward <gward@python.net>
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12 import audioop
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Collin Winter <collinw@gmail.com>
parents: 39176
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13 import unittest
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14
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parents: 29297
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15 # Arggh, AFMT_S16_NE not defined on all platforms -- seems to be a
ed949b82f95d Factor endian-ness check out of play_sound_file(), and fix
Greg Ward <gward@python.net>
parents: 29297
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16 # fairly recent addition to OSS.
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Greg Ward <gward@python.net>
parents: 29297
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17 try:
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Greg Ward <gward@python.net>
parents: 29297
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18 from ossaudiodev import AFMT_S16_NE
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Greg Ward <gward@python.net>
parents: 29297
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19 except ImportError:
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Greg Ward <gward@python.net>
parents: 29297
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20 if sys.byteorder == "little":
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parents: 29297
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21 AFMT_S16_NE = ossaudiodev.AFMT_S16_LE
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Greg Ward <gward@python.net>
parents: 29297
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22 else:
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23 AFMT_S16_NE = ossaudiodev.AFMT_S16_BE
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24
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25
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parents: 45468
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26 def read_sound_file(path):
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27 with open(path, 'rb') as fp:
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28 au = sunau.open(fp)
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29 rate = au.getframerate()
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30 nchannels = au.getnchannels()
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31 encoding = au._encoding
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32 fp.seek(0)
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33 data = fp.read()
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34
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35 if encoding != sunau.AUDIO_FILE_ENCODING_MULAW_8:
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36 raise RuntimeError("Expect .au file with 8-bit mu-law samples")
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37
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38 # Convert the data to 16-bit signed.
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39 data = audioop.ulaw2lin(data, 2)
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40 return (data, rate, 16, nchannels)
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41
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42 class OSSAudioDevTests(unittest.TestCase):
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43
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44 def play_sound_file(self, data, rate, ssize, nchannels):
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45 try:
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46 dsp = ossaudiodev.open('w')
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47 except IOError, msg:
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48 if msg.args[0] in (errno.EACCES, errno.ENOENT,
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49 errno.ENODEV, errno.EBUSY):
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50 raise unittest.SkipTest(msg)
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51 raise
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52
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53 # at least check that these methods can be invoked
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54 dsp.bufsize()
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55 dsp.obufcount()
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56 dsp.obuffree()
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57 dsp.getptr()
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58 dsp.fileno()
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59
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60 # Make sure the read-only attributes work.
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61 self.assertFalse(dsp.closed)
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62 self.assertEqual(dsp.name, "/dev/dsp")
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63 self.assertEqual(dsp.mode, "w", "bad dsp.mode: %r" % dsp.mode)
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64
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65 # And make sure they're really read-only.
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66 for attr in ('closed', 'name', 'mode'):
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67 try:
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68 setattr(dsp, attr, 42)
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69 except TypeError:
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70 pass
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71 else:
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72 self.fail("dsp.%s not read-only" % attr)
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73
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74 # Compute expected running time of sound sample (in seconds).
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75 expected_time = float(len(data)) / (ssize//8) / nchannels / rate
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76
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77 # set parameters based on .au file headers
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78 dsp.setparameters(AFMT_S16_NE, nchannels, rate)
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79 self.assertTrue(abs(expected_time - 3.51) < 1e-2, expected_time)
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80 t1 = time.time()
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81 dsp.write(data)
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82 dsp.close()
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83 t2 = time.time()
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84 elapsed_time = t2 - t1
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85
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86 percent_diff = (abs(elapsed_time - expected_time) / expected_time) * 100
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87 self.assertTrue(percent_diff <= 10.0,
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88 "elapsed time > 10% off of expected time")
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89
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90 def set_parameters(self, dsp):
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91 # Two configurations for testing:
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92 # config1 (8-bit, mono, 8 kHz) should work on even the most
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93 # ancient and crufty sound card, but maybe not on special-
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94 # purpose high-end hardware
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95 # config2 (16-bit, stereo, 44.1kHz) should work on all but the
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96 # most ancient and crufty hardware
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97 config1 = (ossaudiodev.AFMT_U8, 1, 8000)
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98 config2 = (AFMT_S16_NE, 2, 44100)
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99
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100 for config in [config1, config2]:
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101 (fmt, channels, rate) = config
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102 if (dsp.setfmt(fmt) == fmt and
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103 dsp.channels(channels) == channels and
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104 dsp.speed(rate) == rate):
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105 break
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106 else:
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107 raise RuntimeError("unable to set audio sampling parameters: "
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108 "you must have really weird audio hardware")
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109
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110 # setparameters() should be able to set this configuration in
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111 # either strict or non-strict mode.
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112 result = dsp.setparameters(fmt, channels, rate, False)
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113 self.assertEqual(result, (fmt, channels, rate),
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114 "setparameters%r: returned %r" % (config, result))
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115
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116 result = dsp.setparameters(fmt, channels, rate, True)
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117 self.assertEqual(result, (fmt, channels, rate),
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118 "setparameters%r: returned %r" % (config, result))
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119
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120 def set_bad_parameters(self, dsp):
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121 # Now try some configurations that are presumably bogus: eg. 300
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122 # channels currently exceeds even Hollywood's ambitions, and
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123 # negative sampling rate is utter nonsense. setparameters() should
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124 # accept these in non-strict mode, returning something other than
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125 # was requested, but should barf in strict mode.
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126 fmt = AFMT_S16_NE
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127 rate = 44100
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128 channels = 2
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129 for config in [(fmt, 300, rate), # ridiculous nchannels
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130 (fmt, -5, rate), # impossible nchannels
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131 (fmt, channels, -50), # impossible rate
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132 ]:
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133 (fmt, channels, rate) = config
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134 result = dsp.setparameters(fmt, channels, rate, False)
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135 self.assertNotEqual(result, config,
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136 "unexpectedly got requested configuration")
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137
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138 try:
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139 result = dsp.setparameters(fmt, channels, rate, True)
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140 except ossaudiodev.OSSAudioError, err:
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141 pass
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142 else:
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143 self.fail("expected OSSAudioError")
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144
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145 def test_playback(self):
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146 sound_info = read_sound_file(findfile('audiotest.au'))
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147 self.play_sound_file(*sound_info)
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148
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149 def test_set_parameters(self):
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150 dsp = ossaudiodev.open("w")
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151 try:
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152 self.set_parameters(dsp)
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153
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154 # Disabled because it fails under Linux 2.6 with ALSA's OSS
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155 # emulation layer.
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156 #self.set_bad_parameters(dsp)
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157 finally:
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158 dsp.close()
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159 self.assertTrue(dsp.closed)
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160
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161
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162 def test_main():
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163 try:
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164 dsp = ossaudiodev.open('w')
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165 except (ossaudiodev.error, IOError), msg:
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166 if msg.args[0] in (errno.EACCES, errno.ENOENT,
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167 errno.ENODEV, errno.EBUSY):
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168 raise unittest.SkipTest(msg)
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169 raise
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170 dsp.close()
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171 test_support.run_unittest(__name__)
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172
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173 if __name__ == "__main__":
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174 test_main()