Demo/sgi/audio/play.py

   1 #! /usr/bin/env python
   2
   3 import sys
   4 import audio
   5
   6 import string
   7 import getopt
   8 import auds
   9
  10 debug = []
  11
  12 DEF_RATE = 3
  13
  14 def main():
  15         #
  16         gain = 100
  17         rate = 0
  18         starter = audio.write
  19         stopper = 0
  20         #
  21         optlist, args = getopt.getopt(sys.argv[1:], 'adg:r:')
  22         #
  23         for optname, optarg in optlist:
  24                 if 0:
  25                         pass
  26                 elif optname == '-d':
  27                         debug.append(1)
  28                 elif optname == '-g':
  29                         gain = string.atoi(optarg)
  30                         if not (0 < gain < 256):
  31                                 raise optarg.error, '-g gain out of range'
  32                 elif optname == '-r':
  33                         rate = string.atoi(optarg)
  34                         if not (1 <= rate <= 3):
  35                                 raise optarg.error, '-r rate out of range'
  36                 elif optname == '-a':
  37                         starter = audio.start_playing
  38                         stopper = audio.wait_playing
  39         #
  40         audio.setoutgain(gain)
  41         audio.setrate(rate)
  42         #
  43         if not args:
  44                 play(starter, rate, auds.loadfp(sys.stdin))
  45         else:
  46                 real_stopper = 0
  47                 for file in args:
  48                         if real_stopper:
  49                                 real_stopper()
  50                         play(starter, rate, auds.load(file))
  51                         real_stopper = stopper
  52
  53 def play(starter, rate, data):
  54         magic = data[:4]
  55         if magic == '0008':
  56                 mrate = 3
  57         elif magic == '0016':
  58                 mrate = 2
  59         elif magic == '0032':
  60                 mrate = 1
  61         else:
  62                 mrate = 0
  63         if mrate:
  64                 data = data[4:]
  65         else:
  66                 mrate = DEF_RATE
  67         if not rate: rate = mrate
  68         audio.setrate(rate)
  69         starter(data)
  70
  71 try:
  72         main()
  73 finally:
  74         audio.setoutgain(0)
  75         audio.done()