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122 lines
2.7 KiB
Python
122 lines
2.7 KiB
Python
QSIZE = 100000
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error='Audio_mac.error'
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class Play_Audio_mac:
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def __init__(self, qsize=QSIZE):
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self._chan = None
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self._qsize = qsize
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self._outrate = 22254
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self._sampwidth = 1
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self._nchannels = 1
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self._gc = []
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self._usercallback = None
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def __del__(self):
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self.stop()
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self._usercallback = None
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def wait(self):
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import time
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while self.getfilled():
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time.sleep(0.1)
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self._chan = None
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self._gc = []
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def stop(self, quietNow = 1):
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##chan = self._chan
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self._chan = None
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##chan.SndDisposeChannel(1)
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self._gc = []
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def setoutrate(self, outrate):
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self._outrate = outrate
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def setsampwidth(self, sampwidth):
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self._sampwidth = sampwidth
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def setnchannels(self, nchannels):
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self._nchannels = nchannels
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def writeframes(self, data):
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import time
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from Carbon.Sound import bufferCmd, callBackCmd, extSH
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import struct
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import MacOS
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if not self._chan:
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from Carbon import Snd
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self._chan = Snd.SndNewChannel(5, 0, self._callback)
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nframes = len(data) / self._nchannels / self._sampwidth
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if len(data) != nframes * self._nchannels * self._sampwidth:
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raise error, 'data is not a whole number of frames'
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while self._gc and \
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self.getfilled() + nframes > \
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self._qsize / self._nchannels / self._sampwidth:
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time.sleep(0.1)
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if self._sampwidth == 1:
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import audioop
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data = audioop.add(data, '\x80'*len(data), 1)
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h1 = struct.pack('llHhllbbl',
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id(data)+MacOS.string_id_to_buffer,
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self._nchannels,
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self._outrate, 0,
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0,
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0,
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extSH,
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60,
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nframes)
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h2 = 22*'\0'
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h3 = struct.pack('hhlll',
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self._sampwidth*8,
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0,
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0,
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0,
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0)
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header = h1+h2+h3
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self._gc.append((header, data))
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self._chan.SndDoCommand((bufferCmd, 0, header), 0)
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self._chan.SndDoCommand((callBackCmd, 0, 0), 0)
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def _callback(self, *args):
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del self._gc[0]
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if self._usercallback:
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self._usercallback()
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def setcallback(self, callback):
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self._usercallback = callback
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def getfilled(self):
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filled = 0
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for header, data in self._gc:
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filled = filled + len(data)
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return filled / self._nchannels / self._sampwidth
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def getfillable(self):
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return (self._qsize / self._nchannels / self._sampwidth) - self.getfilled()
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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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def test():
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import aifc
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import macfs
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fss, ok = macfs.PromptGetFile("Select an AIFF soundfile", "AIFF")
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if not ok: return
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fn = fss.as_pathname()
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af = aifc.open(fn, 'r')
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print af.getparams()
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p = Play_Audio_mac()
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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 = 10000
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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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p.writeframes(data)
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print 'wrote', len(data), 'space', p.getfillable()
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p.wait()
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if __name__ == '__main__':
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test()
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