"""Classes for manipulating audio devices (currently only for Sun and SGI)"""

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from warnings import warnpy3k

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warnpy3k("the audiodev module has been removed in Python 3.0", stacklevel=2)

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del warnpy3k

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__all__ = ["error","AudioDev"]

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class error(Exception):

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pass

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class Play_Audio_sgi:

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# Private instance variables

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## if 0: access frameratelist, nchannelslist, sampwidthlist, oldparams, \

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## params, config, inited_outrate, inited_width, \

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## inited_nchannels, port, converter, classinited: private

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classinited = 0

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frameratelist = nchannelslist = sampwidthlist = None

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def initclass(self):

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import AL

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self.frameratelist = [

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(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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]

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self.nchannelslist = [

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(1, AL.MONO),

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(2, AL.STEREO),

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(4, AL.QUADRO),

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]

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self.sampwidthlist = [

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(1, AL.SAMPLE_8),

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(2, AL.SAMPLE_16),

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(3, AL.SAMPLE_24),

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]

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self.classinited = 1

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def __init__(self):

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import al, AL

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if not self.classinited:

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self.initclass()

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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, 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, 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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import AL

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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, 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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## if 0: 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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## if 0: 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, 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 = SUNAUDIODEV.ENCODING_ULAW

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# XXX Hack, hack -- leave defaults

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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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## # Nobody remembers what this method does, and it's broken. :-(

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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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# Dynamically try to import and use a platform specific module.

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try:

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import al

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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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try:

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import Audio_mac

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except ImportError:

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raise error, 'no audio device'

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else:

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return Audio_mac.Play_Audio_mac()

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else:

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return Play_Audio_sgi()

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def test(fn = None):

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import sys

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if sys.argv[1:]:

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fn = sys.argv[1]

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else:

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fn = 'f:just samples:just.aif'

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import aifc

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af = aifc.open(fn, 'r')

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print fn, af.getparams()

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p = AudioDev()

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p.setoutrate(af.getframerate())

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p.setsampwidth(af.getsampwidth())

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p.setnchannels(af.getnchannels())

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BUFSIZ = af.getframerate()/af.getsampwidth()/af.getnchannels()

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while 1:

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data = af.readframes(BUFSIZ)

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if not data: break

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print len(data)

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p.writeframes(data)

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p.wait()

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if __name__ == '__main__':

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test()

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