projects / OpenSPARC-T2-SAM / blame
| Commit | Line | Data |
|---|---|---|
| 920dae64 AT |
1 | """Classes for manipulating audio devices (currently only for Sun and SGI)""" |
| 2 | ||
| 3 | __all__ = ["error","AudioDev"] | |
| 4 | ||
| 5 | class error(Exception): | |
| 6 | pass | |
| 7 | ||
| 8 | class Play_Audio_sgi: | |
| 9 | # Private instance variables | |
| 10 | ## if 0: access frameratelist, nchannelslist, sampwidthlist, oldparams, \ | |
| 11 | ## params, config, inited_outrate, inited_width, \ | |
| 12 | ## inited_nchannels, port, converter, classinited: private | |
| 13 | ||
| 14 | classinited = 0 | |
| 15 | frameratelist = nchannelslist = sampwidthlist = None | |
| 16 | ||
| 17 | def initclass(self): | |
| 18 | import AL | |
| 19 | self.frameratelist = [ | |
| 20 | (48000, AL.RATE_48000), | |
| 21 | (44100, AL.RATE_44100), | |
| 22 | (32000, AL.RATE_32000), | |
| 23 | (22050, AL.RATE_22050), | |
| 24 | (16000, AL.RATE_16000), | |
| 25 | (11025, AL.RATE_11025), | |
| 26 | ( 8000, AL.RATE_8000), | |
| 27 | ] | |
| 28 | self.nchannelslist = [ | |
| 29 | (1, AL.MONO), | |
| 30 | (2, AL.STEREO), | |
| 31 | (4, AL.QUADRO), | |
| 32 | ] | |
| 33 | self.sampwidthlist = [ | |
| 34 | (1, AL.SAMPLE_8), | |
| 35 | (2, AL.SAMPLE_16), | |
| 36 | (3, AL.SAMPLE_24), | |
| 37 | ] | |
| 38 | self.classinited = 1 | |
| 39 | ||
| 40 | def __init__(self): | |
| 41 | import al, AL | |
| 42 | if not self.classinited: | |
| 43 | self.initclass() | |
| 44 | self.oldparams = [] | |
| 45 | self.params = [AL.OUTPUT_RATE, 0] | |
| 46 | self.config = al.newconfig() | |
| 47 | self.inited_outrate = 0 | |
| 48 | self.inited_width = 0 | |
| 49 | self.inited_nchannels = 0 | |
| 50 | self.converter = None | |
| 51 | self.port = None | |
| 52 | return | |
| 53 | ||
| 54 | def __del__(self): | |
| 55 | if self.port: | |
| 56 | self.stop() | |
| 57 | if self.oldparams: | |
| 58 | import al, AL | |
| 59 | al.setparams(AL.DEFAULT_DEVICE, self.oldparams) | |
| 60 | self.oldparams = [] | |
| 61 | ||
| 62 | def wait(self): | |
| 63 | if not self.port: | |
| 64 | return | |
| 65 | import time | |
| 66 | while self.port.getfilled() > 0: | |
| 67 | time.sleep(0.1) | |
| 68 | self.stop() | |
| 69 | ||
| 70 | def stop(self): | |
| 71 | if self.port: | |
| 72 | self.port.closeport() | |
| 73 | self.port = None | |
| 74 | if self.oldparams: | |
| 75 | import al, AL | |
| 76 | al.setparams(AL.DEFAULT_DEVICE, self.oldparams) | |
| 77 | self.oldparams = [] | |
| 78 | ||
| 79 | def setoutrate(self, rate): | |
| 80 | for (raw, cooked) in self.frameratelist: | |
| 81 | if rate == raw: | |
| 82 | self.params[1] = cooked | |
| 83 | self.inited_outrate = 1 | |
| 84 | break | |
| 85 | else: | |
| 86 | raise error, 'bad output rate' | |
| 87 | ||
| 88 | def setsampwidth(self, width): | |
| 89 | for (raw, cooked) in self.sampwidthlist: | |
| 90 | if width == raw: | |
| 91 | self.config.setwidth(cooked) | |
| 92 | self.inited_width = 1 | |
| 93 | break | |
| 94 | else: | |
| 95 | if width == 0: | |
| 96 | import AL | |
| 97 | self.inited_width = 0 | |
| 98 | self.config.setwidth(AL.SAMPLE_16) | |
| 99 | self.converter = self.ulaw2lin | |
| 100 | else: | |
| 101 | raise error, 'bad sample width' | |
| 102 | ||
| 103 | def setnchannels(self, nchannels): | |
| 104 | for (raw, cooked) in self.nchannelslist: | |
| 105 | if nchannels == raw: | |
| 106 | self.config.setchannels(cooked) | |
| 107 | self.inited_nchannels = 1 | |
| 108 | break | |
| 109 | else: | |
| 110 | raise error, 'bad # of channels' | |
| 111 | ||
| 112 | def writeframes(self, data): | |
| 113 | if not (self.inited_outrate and self.inited_nchannels): | |
| 114 | raise error, 'params not specified' | |
| 115 | if not self.port: | |
| 116 | import al, AL | |
| 117 | self.port = al.openport('Python', 'w', self.config) | |
| 118 | self.oldparams = self.params[:] | |
| 119 | al.getparams(AL.DEFAULT_DEVICE, self.oldparams) | |
| 120 | al.setparams(AL.DEFAULT_DEVICE, self.params) | |
| 121 | if self.converter: | |
| 122 | data = self.converter(data) | |
| 123 | self.port.writesamps(data) | |
| 124 | ||
| 125 | def getfilled(self): | |
| 126 | if self.port: | |
| 127 | return self.port.getfilled() | |
| 128 | else: | |
| 129 | return 0 | |
| 130 | ||
| 131 | def getfillable(self): | |
| 132 | if self.port: | |
| 133 | return self.port.getfillable() | |
| 134 | else: | |
| 135 | return self.config.getqueuesize() | |
| 136 | ||
| 137 | # private methods | |
| 138 | ## if 0: access *: private | |
| 139 | ||
| 140 | def ulaw2lin(self, data): | |
| 141 | import audioop | |
| 142 | return audioop.ulaw2lin(data, 2) | |
| 143 | ||
| 144 | class Play_Audio_sun: | |
| 145 | ## if 0: access outrate, sampwidth, nchannels, inited_outrate, inited_width, \ | |
| 146 | ## inited_nchannels, converter: private | |
| 147 | ||
| 148 | def __init__(self): | |
| 149 | self.outrate = 0 | |
| 150 | self.sampwidth = 0 | |
| 151 | self.nchannels = 0 | |
| 152 | self.inited_outrate = 0 | |
| 153 | self.inited_width = 0 | |
| 154 | self.inited_nchannels = 0 | |
| 155 | self.converter = None | |
| 156 | self.port = None | |
| 157 | return | |
| 158 | ||
| 159 | def __del__(self): | |
| 160 | self.stop() | |
| 161 | ||
| 162 | def setoutrate(self, rate): | |
| 163 | self.outrate = rate | |
| 164 | self.inited_outrate = 1 | |
| 165 | ||
| 166 | def setsampwidth(self, width): | |
| 167 | self.sampwidth = width | |
| 168 | self.inited_width = 1 | |
| 169 | ||
| 170 | def setnchannels(self, nchannels): | |
| 171 | self.nchannels = nchannels | |
| 172 | self.inited_nchannels = 1 | |
| 173 | ||
| 174 | def writeframes(self, data): | |
| 175 | if not (self.inited_outrate and self.inited_width and self.inited_nchannels): | |
| 176 | raise error, 'params not specified' | |
| 177 | if not self.port: | |
| 178 | import sunaudiodev, SUNAUDIODEV | |
| 179 | self.port = sunaudiodev.open('w') | |
| 180 | info = self.port.getinfo() | |
| 181 | info.o_sample_rate = self.outrate | |
| 182 | info.o_channels = self.nchannels | |
| 183 | if self.sampwidth == 0: | |
| 184 | info.o_precision = 8 | |
| 185 | self.o_encoding = SUNAUDIODEV.ENCODING_ULAW | |
| 186 | # XXX Hack, hack -- leave defaults | |
| 187 | else: | |
| 188 | info.o_precision = 8 * self.sampwidth | |
| 189 | info.o_encoding = SUNAUDIODEV.ENCODING_LINEAR | |
| 190 | self.port.setinfo(info) | |
| 191 | if self.converter: | |
| 192 | data = self.converter(data) | |
| 193 | self.port.write(data) | |
| 194 | ||
| 195 | def wait(self): | |
| 196 | if not self.port: | |
| 197 | return | |
| 198 | self.port.drain() | |
| 199 | self.stop() | |
| 200 | ||
| 201 | def stop(self): | |
| 202 | if self.port: | |
| 203 | self.port.flush() | |
| 204 | self.port.close() | |
| 205 | self.port = None | |
| 206 | ||
| 207 | def getfilled(self): | |
| 208 | if self.port: | |
| 209 | return self.port.obufcount() | |
| 210 | else: | |
| 211 | return 0 | |
| 212 | ||
| 213 | ## # Nobody remembers what this method does, and it's broken. :-( | |
| 214 | ## def getfillable(self): | |
| 215 | ## return BUFFERSIZE - self.getfilled() | |
| 216 | ||
| 217 | def AudioDev(): | |
| 218 | # Dynamically try to import and use a platform specific module. | |
| 219 | try: | |
| 220 | import al | |
| 221 | except ImportError: | |
| 222 | try: | |
| 223 | import sunaudiodev | |
| 224 | return Play_Audio_sun() | |
| 225 | except ImportError: | |
| 226 | try: | |
| 227 | import Audio_mac | |
| 228 | except ImportError: | |
| 229 | raise error, 'no audio device' | |
| 230 | else: | |
| 231 | return Audio_mac.Play_Audio_mac() | |
| 232 | else: | |
| 233 | return Play_Audio_sgi() | |
| 234 | ||
| 235 | def test(fn = None): | |
| 236 | import sys | |
| 237 | if sys.argv[1:]: | |
| 238 | fn = sys.argv[1] | |
| 239 | else: | |
| 240 | fn = 'f:just samples:just.aif' | |
| 241 | import aifc | |
| 242 | af = aifc.open(fn, 'r') | |
| 243 | print fn, af.getparams() | |
| 244 | p = AudioDev() | |
| 245 | p.setoutrate(af.getframerate()) | |
| 246 | p.setsampwidth(af.getsampwidth()) | |
| 247 | p.setnchannels(af.getnchannels()) | |
| 248 | BUFSIZ = af.getframerate()/af.getsampwidth()/af.getnchannels() | |
| 249 | while 1: | |
| 250 | data = af.readframes(BUFSIZ) | |
| 251 | if not data: break | |
| 252 | print len(data) | |
| 253 | p.writeframes(data) | |
| 254 | p.wait() | |
| 255 | ||
| 256 | if __name__ == '__main__': | |
| 257 | test() |