1 | """Classes for manipulating audio devices (currently only for Sun and SGI)""" |
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2 | from warnings import warnpy3k |
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3 | warnpy3k("the audiodev module has been removed in Python 3.0", stacklevel=2) |
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4 | del warnpy3k |
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5 | |
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6 | __all__ = ["error","AudioDev"] |
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7 | |
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8 | class error(Exception): |
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9 | pass |
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10 | |
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11 | class Play_Audio_sgi: |
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12 | # Private instance variables |
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13 | ## if 0: access frameratelist, nchannelslist, sampwidthlist, oldparams, \ |
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14 | ## params, config, inited_outrate, inited_width, \ |
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15 | ## inited_nchannels, port, converter, classinited: private |
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16 | |
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17 | classinited = 0 |
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18 | frameratelist = nchannelslist = sampwidthlist = None |
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19 | |
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20 | def initclass(self): |
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21 | import AL |
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22 | self.frameratelist = [ |
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23 | (48000, AL.RATE_48000), |
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24 | (44100, AL.RATE_44100), |
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25 | (32000, AL.RATE_32000), |
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26 | (22050, AL.RATE_22050), |
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27 | (16000, AL.RATE_16000), |
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28 | (11025, AL.RATE_11025), |
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29 | ( 8000, AL.RATE_8000), |
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30 | ] |
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31 | self.nchannelslist = [ |
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32 | (1, AL.MONO), |
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33 | (2, AL.STEREO), |
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34 | (4, AL.QUADRO), |
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35 | ] |
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36 | self.sampwidthlist = [ |
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37 | (1, AL.SAMPLE_8), |
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38 | (2, AL.SAMPLE_16), |
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39 | (3, AL.SAMPLE_24), |
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40 | ] |
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41 | self.classinited = 1 |
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42 | |
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43 | def __init__(self): |
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44 | import al, AL |
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45 | if not self.classinited: |
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46 | self.initclass() |
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47 | self.oldparams = [] |
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48 | self.params = [AL.OUTPUT_RATE, 0] |
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49 | self.config = al.newconfig() |
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50 | self.inited_outrate = 0 |
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51 | self.inited_width = 0 |
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52 | self.inited_nchannels = 0 |
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53 | self.converter = None |
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54 | self.port = None |
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55 | return |
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56 | |
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57 | def __del__(self): |
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58 | if self.port: |
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59 | self.stop() |
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60 | if self.oldparams: |
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61 | import al, AL |
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62 | al.setparams(AL.DEFAULT_DEVICE, self.oldparams) |
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63 | self.oldparams = [] |
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64 | |
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65 | def wait(self): |
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66 | if not self.port: |
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67 | return |
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68 | import time |
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69 | while self.port.getfilled() > 0: |
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70 | time.sleep(0.1) |
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71 | self.stop() |
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72 | |
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73 | def stop(self): |
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74 | if self.port: |
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75 | self.port.closeport() |
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76 | self.port = None |
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77 | if self.oldparams: |
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78 | import al, AL |
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79 | al.setparams(AL.DEFAULT_DEVICE, self.oldparams) |
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80 | self.oldparams = [] |
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81 | |
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82 | def setoutrate(self, rate): |
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83 | for (raw, cooked) in self.frameratelist: |
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84 | if rate == raw: |
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85 | self.params[1] = cooked |
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86 | self.inited_outrate = 1 |
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87 | break |
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88 | else: |
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89 | raise error, 'bad output rate' |
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90 | |
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91 | def setsampwidth(self, width): |
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92 | for (raw, cooked) in self.sampwidthlist: |
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93 | if width == raw: |
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94 | self.config.setwidth(cooked) |
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95 | self.inited_width = 1 |
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96 | break |
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97 | else: |
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98 | if width == 0: |
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99 | import AL |
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100 | self.inited_width = 0 |
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101 | self.config.setwidth(AL.SAMPLE_16) |
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102 | self.converter = self.ulaw2lin |
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103 | else: |
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104 | raise error, 'bad sample width' |
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105 | |
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106 | def setnchannels(self, nchannels): |
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107 | for (raw, cooked) in self.nchannelslist: |
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108 | if nchannels == raw: |
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109 | self.config.setchannels(cooked) |
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110 | self.inited_nchannels = 1 |
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111 | break |
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112 | else: |
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113 | raise error, 'bad # of channels' |
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114 | |
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115 | def writeframes(self, data): |
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116 | if not (self.inited_outrate and self.inited_nchannels): |
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117 | raise error, 'params not specified' |
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118 | if not self.port: |
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119 | import al, AL |
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120 | self.port = al.openport('Python', 'w', self.config) |
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121 | self.oldparams = self.params[:] |
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122 | al.getparams(AL.DEFAULT_DEVICE, self.oldparams) |
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123 | al.setparams(AL.DEFAULT_DEVICE, self.params) |
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124 | if self.converter: |
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125 | data = self.converter(data) |
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126 | self.port.writesamps(data) |
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127 | |
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128 | def getfilled(self): |
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129 | if self.port: |
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130 | return self.port.getfilled() |
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131 | else: |
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132 | return 0 |
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133 | |
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134 | def getfillable(self): |
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135 | if self.port: |
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136 | return self.port.getfillable() |
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137 | else: |
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138 | return self.config.getqueuesize() |
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139 | |
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140 | # private methods |
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141 | ## if 0: access *: private |
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142 | |
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143 | def ulaw2lin(self, data): |
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144 | import audioop |
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145 | return audioop.ulaw2lin(data, 2) |
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146 | |
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147 | class Play_Audio_sun: |
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148 | ## if 0: access outrate, sampwidth, nchannels, inited_outrate, inited_width, \ |
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149 | ## inited_nchannels, converter: private |
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150 | |
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151 | def __init__(self): |
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152 | self.outrate = 0 |
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153 | self.sampwidth = 0 |
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154 | self.nchannels = 0 |
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155 | self.inited_outrate = 0 |
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156 | self.inited_width = 0 |
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157 | self.inited_nchannels = 0 |
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158 | self.converter = None |
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159 | self.port = None |
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160 | return |
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161 | |
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162 | def __del__(self): |
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163 | self.stop() |
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164 | |
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165 | def setoutrate(self, rate): |
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166 | self.outrate = rate |
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167 | self.inited_outrate = 1 |
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168 | |
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169 | def setsampwidth(self, width): |
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170 | self.sampwidth = width |
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171 | self.inited_width = 1 |
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172 | |
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173 | def setnchannels(self, nchannels): |
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174 | self.nchannels = nchannels |
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175 | self.inited_nchannels = 1 |
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176 | |
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177 | def writeframes(self, data): |
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178 | if not (self.inited_outrate and self.inited_width and self.inited_nchannels): |
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179 | raise error, 'params not specified' |
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180 | if not self.port: |
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181 | import sunaudiodev, SUNAUDIODEV |
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182 | self.port = sunaudiodev.open('w') |
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183 | info = self.port.getinfo() |
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184 | info.o_sample_rate = self.outrate |
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185 | info.o_channels = self.nchannels |
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186 | if self.sampwidth == 0: |
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187 | info.o_precision = 8 |
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188 | self.o_encoding = SUNAUDIODEV.ENCODING_ULAW |
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189 | # XXX Hack, hack -- leave defaults |
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190 | else: |
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191 | info.o_precision = 8 * self.sampwidth |
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192 | info.o_encoding = SUNAUDIODEV.ENCODING_LINEAR |
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193 | self.port.setinfo(info) |
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194 | if self.converter: |
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195 | data = self.converter(data) |
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196 | self.port.write(data) |
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197 | |
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198 | def wait(self): |
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199 | if not self.port: |
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200 | return |
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201 | self.port.drain() |
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202 | self.stop() |
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203 | |
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204 | def stop(self): |
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205 | if self.port: |
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206 | self.port.flush() |
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207 | self.port.close() |
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208 | self.port = None |
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209 | |
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210 | def getfilled(self): |
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211 | if self.port: |
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212 | return self.port.obufcount() |
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213 | else: |
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214 | return 0 |
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215 | |
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216 | ## # Nobody remembers what this method does, and it's broken. :-( |
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217 | ## def getfillable(self): |
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218 | ## return BUFFERSIZE - self.getfilled() |
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219 | |
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220 | def AudioDev(): |
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221 | # Dynamically try to import and use a platform specific module. |
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222 | try: |
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223 | import al |
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224 | except ImportError: |
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225 | try: |
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226 | import sunaudiodev |
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227 | return Play_Audio_sun() |
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228 | except ImportError: |
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229 | try: |
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230 | import Audio_mac |
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231 | except ImportError: |
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232 | raise error, 'no audio device' |
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233 | else: |
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234 | return Audio_mac.Play_Audio_mac() |
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235 | else: |
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236 | return Play_Audio_sgi() |
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237 | |
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238 | def test(fn = None): |
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239 | import sys |
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240 | if sys.argv[1:]: |
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241 | fn = sys.argv[1] |
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242 | else: |
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243 | fn = 'f:just samples:just.aif' |
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244 | import aifc |
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245 | af = aifc.open(fn, 'r') |
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246 | print fn, af.getparams() |
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247 | p = AudioDev() |
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248 | p.setoutrate(af.getframerate()) |
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249 | p.setsampwidth(af.getsampwidth()) |
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250 | p.setnchannels(af.getnchannels()) |
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251 | BUFSIZ = af.getframerate()/af.getsampwidth()/af.getnchannels() |
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252 | while 1: |
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253 | data = af.readframes(BUFSIZ) |
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254 | if not data: break |
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255 | print len(data) |
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256 | p.writeframes(data) |
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257 | p.wait() |
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258 | |
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259 | if __name__ == '__main__': |
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260 | test() |
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