Interface to audio hardware for SGI and Sun.
diff --git a/Lib/audiodev.py b/Lib/audiodev.py
new file mode 100644
index 0000000..d0dcfed
--- /dev/null
+++ b/Lib/audiodev.py
@@ -0,0 +1,205 @@
+import AL, SUNAUDIODEV
+
+error = 'audiodev.error'
+
+class Play_Audio_sgi:
+ # Private instance variables
+ access frameratelist, nchannelslist, sampwidthlist, oldparams, \
+ params, config, inited_outrate, inited_width, \
+ inited_nchannels, port, converter: private
+
+ frameratelist = [(48000, AL.RATE_48000),
+ (44100, AL.RATE_44100),
+ (32000, AL.RATE_32000),
+ (22050, AL.RATE_22050),
+ (16000, AL.RATE_16000),
+ (11025, AL.RATE_11025),
+ ( 8000, AL.RATE_8000)]
+ nchannelslist = [(1, AL.MONO),
+ (2, AL.STEREO)]
+ sampwidthlist = [(1, AL.SAMPLE_8),
+ (2, AL.SAMPLE_16),
+ (3, AL.SAMPLE_24)]
+
+ def __init__(self):
+ import al
+ self.oldparams = []
+ self.params = [AL.OUTPUT_RATE, 0]
+ self.config = al.newconfig()
+ self.inited_outrate = 0
+ self.inited_width = 0
+ self.inited_nchannels = 0
+ self.converter = None
+ self.port = None
+ return
+
+ def __del__(self):
+ if self.port:
+ self.stop()
+ if self.oldparams:
+ import al
+ al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
+ self.oldparams = []
+
+ def wait(self):
+ if not self.port:
+ return
+ import time
+ while self.port.getfilled() > 0:
+ time.sleep(0.1)
+ self.stop()
+
+ def stop(self):
+ if self.port:
+ self.port.closeport()
+ self.port = None
+ if self.oldparams:
+ import al
+ al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
+ self.oldparams = []
+
+ def setoutrate(self, rate):
+ for (raw, cooked) in self.frameratelist:
+ if rate == raw:
+ self.params[1] = cooked
+ self.inited_outrate = 1
+ break
+ else:
+ raise error, 'bad output rate'
+
+ def setsampwidth(self, width):
+ for (raw, cooked) in self.sampwidthlist:
+ if width == raw:
+ self.config.setwidth(cooked)
+ self.inited_width = 1
+ break
+ else:
+ if width == 0:
+ self.inited_width = 0
+ self.config.setwidth(AL.SAMPLE_16)
+ self.converter = self.ulaw2lin
+ else:
+ raise error, 'bad sample width'
+
+ def setnchannels(self, nchannels):
+ for (raw, cooked) in self.nchannelslist:
+ if nchannels == raw:
+ self.config.setchannels(cooked)
+ self.inited_nchannels = 1
+ break
+ else:
+ raise error, 'bad # of channels'
+
+ def writeframes(self, data):
+ if not (self.inited_outrate and self.inited_nchannels):
+ raise error, 'params not specified'
+ if not self.port:
+ import al
+ self.port = al.openport('Python', 'w', self.config)
+ self.oldparams = self.params[:]
+ al.getparams(AL.DEFAULT_DEVICE, self.oldparams)
+ al.setparams(AL.DEFAULT_DEVICE, self.params)
+ if self.converter:
+ data = self.converter(data)
+ self.port.writesamps(data)
+
+ def getfilled(self):
+ if self.port:
+ return self.port.getfilled()
+ else:
+ return 0
+
+ def getfillable(self):
+ if self.port:
+ return self.port.getfillable()
+ else:
+ return self.config.getqueuesize()
+
+ # private methods
+ access *: private
+
+ def ulaw2lin(self, data):
+ import audioop
+ return audioop.ulaw2lin(data, 2)
+
+class Play_Audio_sun:
+ access outrate, sampwidth, nchannels, inited_outrate, inited_width, \
+ inited_nchannels, converter: private
+
+ def __init__(self):
+ self.outrate = 0
+ self.sampwidth = 0
+ self.nchannels = 0
+ self.inited_outrate = 0
+ self.inited_width = 0
+ self.inited_nchannels = 0
+ self.converter = None
+ self.port = None
+ return
+
+ def __del__(self):
+ self.stop()
+
+ def setoutrate(self, rate):
+ self.outrate = rate
+ self.inited_outrate = 1
+
+ def setsampwidth(self, width):
+ self.sampwidth = width
+ self.inited_width = 1
+
+ def setnchannels(self, nchannels):
+ self.nchannels = nchannels
+ self.inited_nchannels = 1
+
+ def writeframes(self, data):
+ if not (self.inited_outrate and self.inited_width and self.inited_nchannels):
+ raise error, 'params not specified'
+ if not self.port:
+ import sunaudiodev
+ self.port = sunaudiodev.open('w')
+ info = self.port.getinfo()
+ info.o_sample_rate = self.outrate
+ info.o_channels = self.nchannels
+ if self.sampwidth == 0:
+ info.o_precision = 8
+ self.o_encoding = ENCODING_ULAW
+ else:
+ info.o_precision = 8 * self.sampwidth
+ info.o_encoding = SUNAUDIODEV.ENCODING_LINEAR
+ self.port.setinfo(info)
+ if self.converter:
+ data = self.converter(data)
+ self.port.write(data)
+
+ def wait(self):
+ if not self.port:
+ return
+ self.port.drain()
+ self.stop()
+
+ def stop(self):
+ if self.port:
+ self.port.flush()
+ self.port.close()
+ self.port = None
+
+ def getfilled(self):
+ if self.port:
+ return self.port.obufcount()
+ else:
+ return 0
+
+ def getfillable(self):
+ return BUFFERSIZE - self.getfilled()
+
+def AudioDev():
+ try:
+ import al
+ return Play_Audio_sgi()
+ except ImportError:
+ try:
+ import sunaudiodev
+ return Play_Audio_sun()
+ except ImportError:
+ raise error, 'no audio device'