Mac/Demo/sound/playaiff.py

   1 from Sound import *
   2 import Snd
   3
   4 import aifc, audioop
   5
   6 fn = 'f:just samples:2ndbeat.aif'
   7 af = aifc.open(fn, 'r')
   8 print af.getparams()
   9 print 'nframes  =', af.getnframes()
  10 print 'nchannels =', af.getnchannels()
  11 print 'framerate =', af.getframerate()
  12 nframes = min(af.getnframes(), 100000)
  13 frames = af.readframes(nframes)
  14 print 'len(frames) =', len(frames)
  15 print repr(frames[:100])
  16 frames = audioop.add(frames, '\x80'*len(frames), 1)
  17 print repr(frames[:100])
  18
  19 import struct
  20
  21 header1 = struct.pack('llhhllbbl',
  22                       0,
  23                       af.getnchannels(),
  24                       af.getframerate(),0,
  25                       0,
  26                       0,
  27                       0xFF,
  28                       60,
  29                       nframes)
  30 print repr(header1)
  31 header2 = struct.pack('llhlll', 0, 0, 0, 0, 0, 0)
  32 header3 = struct.pack('hhlll',
  33                       af.getsampwidth()*8,
  34                       0,
  35                       0,
  36                       0,
  37                       0)
  38 print repr(header3)
  39 header = header1 + header2 + header3
  40
  41 buffer = header + frames
  42
  43 chan = Snd.SndNewChannel(5,0x00C0)
  44
  45 Snd.SndDoCommand(chan, (bufferCmd, 0, buffer), 0)