mirror of https://github.com/python/cpython
Interface to audio hardware for SGI and Sun.
This commit is contained in:
Sjoerd Mullender
parent
21a3ff9d5d
commit
aa14837bd0
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import AL, SUNAUDIODEV
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error = 'audiodev.error'
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class Play_Audio_sgi:
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# Private instance variables
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access frameratelist, nchannelslist, sampwidthlist, oldparams, \
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params, config, inited_outrate, inited_width, \
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inited_nchannels, port, converter: private
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frameratelist = [(48000, AL.RATE_48000),
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(44100, AL.RATE_44100),
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(32000, AL.RATE_32000),
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(22050, AL.RATE_22050),
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(16000, AL.RATE_16000),
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(11025, AL.RATE_11025),
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( 8000, AL.RATE_8000)]
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nchannelslist = [(1, AL.MONO),
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(2, AL.STEREO)]
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sampwidthlist = [(1, AL.SAMPLE_8),
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(2, AL.SAMPLE_16),
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(3, AL.SAMPLE_24)]
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def __init__(self):
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import al
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self.oldparams = []
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self.params = [AL.OUTPUT_RATE, 0]
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self.config = al.newconfig()
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self.inited_outrate = 0
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self.inited_width = 0
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self.inited_nchannels = 0
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self.converter = None
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self.port = None
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return
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def __del__(self):
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if self.port:
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self.stop()
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if self.oldparams:
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import al
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al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
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self.oldparams = []
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def wait(self):
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if not self.port:
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return
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import time
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while self.port.getfilled() > 0:
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time.sleep(0.1)
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self.stop()
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def stop(self):
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if self.port:
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self.port.closeport()
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self.port = None
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if self.oldparams:
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import al
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al.setparams(AL.DEFAULT_DEVICE, self.oldparams)
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self.oldparams = []
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def setoutrate(self, rate):
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for (raw, cooked) in self.frameratelist:
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if rate == raw:
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self.params[1] = cooked
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self.inited_outrate = 1
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break
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else:
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raise error, 'bad output rate'
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def setsampwidth(self, width):
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for (raw, cooked) in self.sampwidthlist:
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if width == raw:
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self.config.setwidth(cooked)
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self.inited_width = 1
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break
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else:
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if width == 0:
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self.inited_width = 0
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self.config.setwidth(AL.SAMPLE_16)
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self.converter = self.ulaw2lin
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else:
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raise error, 'bad sample width'
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def setnchannels(self, nchannels):
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for (raw, cooked) in self.nchannelslist:
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if nchannels == raw:
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self.config.setchannels(cooked)
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self.inited_nchannels = 1
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break
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else:
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raise error, 'bad # of channels'
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def writeframes(self, data):
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if not (self.inited_outrate and self.inited_nchannels):
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raise error, 'params not specified'
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if not self.port:
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import al
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self.port = al.openport('Python', 'w', self.config)
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self.oldparams = self.params[:]
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al.getparams(AL.DEFAULT_DEVICE, self.oldparams)
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al.setparams(AL.DEFAULT_DEVICE, self.params)
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if self.converter:
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data = self.converter(data)
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self.port.writesamps(data)
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def getfilled(self):
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if self.port:
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return self.port.getfilled()
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else:
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return 0
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def getfillable(self):
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if self.port:
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return self.port.getfillable()
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else:
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return self.config.getqueuesize()
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# private methods
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access *: private
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def ulaw2lin(self, data):
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import audioop
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return audioop.ulaw2lin(data, 2)
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class Play_Audio_sun:
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access outrate, sampwidth, nchannels, inited_outrate, inited_width, \
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inited_nchannels, converter: private
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def __init__(self):
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self.outrate = 0
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self.sampwidth = 0
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self.nchannels = 0
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self.inited_outrate = 0
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self.inited_width = 0
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self.inited_nchannels = 0
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self.converter = None
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self.port = None
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return
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def __del__(self):
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self.stop()
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def setoutrate(self, rate):
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self.outrate = rate
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self.inited_outrate = 1
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def setsampwidth(self, width):
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self.sampwidth = width
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self.inited_width = 1
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def setnchannels(self, nchannels):
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self.nchannels = nchannels
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self.inited_nchannels = 1
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def writeframes(self, data):
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if not (self.inited_outrate and self.inited_width and self.inited_nchannels):
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raise error, 'params not specified'
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if not self.port:
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import sunaudiodev
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self.port = sunaudiodev.open('w')
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info = self.port.getinfo()
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info.o_sample_rate = self.outrate
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info.o_channels = self.nchannels
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if self.sampwidth == 0:
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info.o_precision = 8
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self.o_encoding = ENCODING_ULAW
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else:
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info.o_precision = 8 * self.sampwidth
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info.o_encoding = SUNAUDIODEV.ENCODING_LINEAR
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self.port.setinfo(info)
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if self.converter:
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data = self.converter(data)
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self.port.write(data)
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def wait(self):
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if not self.port:
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return
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self.port.drain()
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self.stop()
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def stop(self):
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if self.port:
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self.port.flush()
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self.port.close()
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self.port = None
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def getfilled(self):
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if self.port:
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return self.port.obufcount()
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else:
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return 0
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def getfillable(self):
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return BUFFERSIZE - self.getfilled()
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def AudioDev():
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try:
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import al
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return Play_Audio_sgi()
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except ImportError:
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try:
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import sunaudiodev
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return Play_Audio_sun()
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except ImportError:
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raise error, 'no audio device'
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