Mercurial > cpython-lru_cache-weakref

annotate Mac/Lib/audiodev.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 7411b6a06920
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2267
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1 error = 'audiodev.error'
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2
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3 class Play_Audio_sgi:
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4 # Private instance variables
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5 access frameratelist, nchannelslist, sampwidthlist, oldparams, \
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6 params, config, inited_outrate, inited_width, \
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7 inited_nchannels, port, converter, classinited: private
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8
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9 classinited = 0
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10 frameratelist = nchannelslist = sampwidthlist = None
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11
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12 def initclass(self):
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13 import AL
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14 Play_Audio_sgi.frameratelist = [
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15 (48000, AL.RATE_48000),
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16 (44100, AL.RATE_44100),
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17 (32000, AL.RATE_32000),
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18 (22050, AL.RATE_22050),
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19 (16000, AL.RATE_16000),
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20 (11025, AL.RATE_11025),
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21 ( 8000, AL.RATE_8000),
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22 ]
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23 Play_Audio_sgi.nchannelslist = [
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24 (1, AL.MONO),
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25 (2, AL.STEREO),
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26 ]
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27 Play_Audio_sgi.sampwidthlist = [
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28 (1, AL.SAMPLE_8),
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29 (2, AL.SAMPLE_16),
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30 (3, AL.SAMPLE_24),
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31 ]
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32 Play_Audio_sgi.classinited = 1
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33
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34 def __init__(self):
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35 import al, AL
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36 if not self.classinited:
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37 self.initclass()
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38 self.oldparams = []
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39 self.params = [AL.OUTPUT_RATE, 0]
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40 self.config = al.newconfig()
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41 self.inited_outrate = 0
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42 self.inited_width = 0
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43 self.inited_nchannels = 0
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44 self.converter = None
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45 self.port = None
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46 return
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47
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48 def __del__(self):
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49 if self.port:
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50 self.stop()
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51 if self.oldparams:
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52 import al, AL
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53 al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
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54 self.oldparams = []
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55
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56 def wait(self):
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57 if not self.port:
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58 return
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59 import time
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60 while self.port.getfilled() > 0:
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61 time.sleep(0.1)
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62 self.stop()
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63
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64 def stop(self):
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65 if self.port:
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66 self.port.closeport()
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67 self.port = None
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68 if self.oldparams:
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69 import al, AL
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70 al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
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71 self.oldparams = []
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72
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73 def setoutrate(self, rate):
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74 for (raw, cooked) in self.frameratelist:
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75 if rate == raw:
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76 self.params[1] = cooked
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77 self.inited_outrate = 1
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78 break
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79 else:
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80 raise error, 'bad output rate'
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81
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82 def setsampwidth(self, width):
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83 for (raw, cooked) in self.sampwidthlist:
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84 if width == raw:
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85 self.config.setwidth(cooked)
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86 self.inited_width = 1
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87 break
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88 else:
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89 if width == 0:
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90 import AL
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91 self.inited_width = 0
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92 self.config.setwidth(AL.SAMPLE_16)
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93 self.converter = self.ulaw2lin
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94 else:
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95 raise error, 'bad sample width'
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96
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97 def setnchannels(self, nchannels):
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98 for (raw, cooked) in self.nchannelslist:
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99 if nchannels == raw:
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100 self.config.setchannels(cooked)
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101 self.inited_nchannels = 1
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102 break
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103 else:
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104 raise error, 'bad # of channels'
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105
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106 def writeframes(self, data):
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107 if not (self.inited_outrate and self.inited_nchannels):
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108 raise error, 'params not specified'
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109 if not self.port:
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110 import al, AL
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111 self.port = al.openport('Python', 'w', self.config)
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112 self.oldparams = self.params[:]
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113 al.getparams(AL.DEFAULT_DEVICE, self.oldparams)
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114 al.setparams(AL.DEFAULT_DEVICE, self.params)
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115 if self.converter:
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116 data = self.converter(data)
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117 self.port.writesamps(data)
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118
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119 def getfilled(self):
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120 if self.port:
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121 return self.port.getfilled()
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122 else:
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123 return 0
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124
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125 def getfillable(self):
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126 if self.port:
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127 return self.port.getfillable()
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128 else:
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129 return self.config.getqueuesize()
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130
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131 # private methods
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132 access *: private
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133
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134 def ulaw2lin(self, data):
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135 import audioop
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136 return audioop.ulaw2lin(data, 2)
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137
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138 class Play_Audio_sun:
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139 access outrate, sampwidth, nchannels, inited_outrate, inited_width, \
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140 inited_nchannels, converter: private
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141
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142 def __init__(self):
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143 self.outrate = 0
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144 self.sampwidth = 0
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145 self.nchannels = 0
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146 self.inited_outrate = 0
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147 self.inited_width = 0
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148 self.inited_nchannels = 0
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149 self.converter = None
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150 self.port = None
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151 return
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152
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153 def __del__(self):
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154 self.stop()
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155
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156 def setoutrate(self, rate):
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157 self.outrate = rate
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158 self.inited_outrate = 1
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159
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160 def setsampwidth(self, width):
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161 self.sampwidth = width
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162 self.inited_width = 1
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163
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164 def setnchannels(self, nchannels):
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165 self.nchannels = nchannels
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166 self.inited_nchannels = 1
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167
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168 def writeframes(self, data):
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169 if not (self.inited_outrate and self.inited_width and self.inited_nchannels):
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170 raise error, 'params not specified'
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171 if not self.port:
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172 import sunaudiodev, SUNAUDIODEV
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173 self.port = sunaudiodev.open('w')
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174 info = self.port.getinfo()
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175 info.o_sample_rate = self.outrate
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176 info.o_channels = self.nchannels
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177 if self.sampwidth == 0:
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178 info.o_precision = 8
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179 self.o_encoding = ENCODING_ULAW
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180 else:
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181 info.o_precision = 8 * self.sampwidth
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Guido van Rossum <guido@python.org>
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182 info.o_encoding = SUNAUDIODEV.ENCODING_LINEAR
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183 self.port.setinfo(info)
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184 if self.converter:
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185 data = self.converter(data)
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186 self.port.write(data)
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187
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188 def wait(self):
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Guido van Rossum <guido@python.org>
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189 if not self.port:
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Guido van Rossum <guido@python.org>
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190 return
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191 self.port.drain()
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192 self.stop()
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193
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194 def stop(self):
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Guido van Rossum <guido@python.org>
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195 if self.port:
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196 self.port.flush()
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Guido van Rossum <guido@python.org>
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197 self.port.close()
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Guido van Rossum <guido@python.org>
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198 self.port = None
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199
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200 def getfilled(self):
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Guido van Rossum <guido@python.org>
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201 if self.port:
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Guido van Rossum <guido@python.org>
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202 return self.port.obufcount()
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Guido van Rossum <guido@python.org>
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203 else:
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Guido van Rossum <guido@python.org>
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204 return 0
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205
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Guido van Rossum <guido@python.org>
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206 def getfillable(self):
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Guido van Rossum <guido@python.org>
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207 return BUFFERSIZE - self.getfilled()
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208
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Guido van Rossum <guido@python.org>
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209 def AudioDev():
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Guido van Rossum <guido@python.org>
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diff changeset
210 try:
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Guido van Rossum <guido@python.org>
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211 import al
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Guido van Rossum <guido@python.org>
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212 return Play_Audio_sgi()
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Guido van Rossum <guido@python.org>
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diff changeset
213 except ImportError:
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Guido van Rossum <guido@python.org>
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diff changeset
214 try:
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Guido van Rossum <guido@python.org>
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215 import sunaudiodev
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Guido van Rossum <guido@python.org>
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216 return Play_Audio_sun()
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Guido van Rossum <guido@python.org>
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diff changeset
217 except ImportError:
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Guido van Rossum <guido@python.org>
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218 try:
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Guido van Rossum <guido@python.org>
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219 import Audio_mac
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Guido van Rossum <guido@python.org>
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220 return Audio_mac.Play_Audio_mac()
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Guido van Rossum <guido@python.org>
parents:
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221 except ImportError:
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Guido van Rossum <guido@python.org>
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222 raise error, 'no audio device'
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223
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Guido van Rossum <guido@python.org>
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224 def test(fn = 'f:just samples:just.aif'):
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Guido van Rossum <guido@python.org>
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225 import aifc
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Guido van Rossum <guido@python.org>
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226 af = aifc.open(fn, 'r')
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Guido van Rossum <guido@python.org>
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227 print fn, af.getparams()
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228 p = AudioDev()
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Guido van Rossum <guido@python.org>
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229 p.setoutrate(af.getframerate())
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Guido van Rossum <guido@python.org>
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diff changeset
230 p.setsampwidth(af.getsampwidth())
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Guido van Rossum <guido@python.org>
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diff changeset
231 p.setnchannels(af.getnchannels())
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diff changeset
232 BUFSIZ = af.getframerate()/af.getsampwidth()/af.getnchannels()
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Guido van Rossum <guido@python.org>
parents:
diff changeset
233 while 1:
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Guido van Rossum <guido@python.org>
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diff changeset
234 data = af.readframes(BUFSIZ)
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Guido van Rossum <guido@python.org>
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diff changeset
235 if not data: break
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Guido van Rossum <guido@python.org>
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236 print len(data)
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Guido van Rossum <guido@python.org>
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237 p.writeframes(data)
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Guido van Rossum <guido@python.org>
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238 p.wait()
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Guido van Rossum <guido@python.org>
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239
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Guido van Rossum <guido@python.org>
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diff changeset
240 if __name__ == '__main__':
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Guido van Rossum <guido@python.org>
parents:
diff changeset
241 test()