Demo/sgi/al/listen.py

   1 # Listen to the input on host argv[1].
   2
   3 import sys, al, AL, posix
   4
   5 BUFSIZE = 2000
   6 QSIZE = 4000
   7
   8 def main():
   9         if len(sys.argv) <> 2:
  10                 sys.stderr.write('usage: ' + sys.argv[0] + ' hostname\n')
  11                 sys.exit(2)
  12         hostname = sys.argv[1]
  13         cmd = 'exec rsh </dev/null ' + hostname + \
  14                 ' "cd /ufs/guido/mm/demo/audio; ' + \
  15                 'exec /ufs/guido/bin/sgi/python record.py"'
  16         pipe = posix.popen(cmd, 'r')
  17         config = al.newconfig()
  18         config.setchannels(AL.MONO)
  19         config.setqueuesize(QSIZE)
  20         port = al.openport('', 'w', config)
  21         while 1:
  22                 data = pipe.read(BUFSIZE)
  23                 if not data:
  24                         sts = pipe.close()
  25                         sys.stderr.write(sys.argv[0] + ': end of data\n')
  26                         if sts: sys.stderr.write('rsh exit status '+`sts`+'\n')
  27                         sys.exit(1)
  28                 port.writesamps(data)
  29                 del data
  30
  31 try:
  32         main()
  33 except KeyboardInterrupt:
  34         sys.exit(1)