Demo/sgi/cd/playcd.py

   1 # Play CD audio on speaker or headphones.
   2
   3 callbacktypes = ['audio','pnum','index','ptime','atime','catalog','ident','control']
   4
   5 def playaudio(port, type, audio):
   6         port.writesamps(audio)
   7
   8 def prtrack(cdinfo, type, pnum):
   9         if cdinfo.track[pnum] <> '':
  10                 print 'playing "' + cdinfo.track[pnum] + '"'
  11         else:
  12                 print callbacktypes[type]+': '+`pnum`
  13
  14 def callback(arg, type, data):
  15         print callbacktypes[type]+': '+`data`
  16
  17 def tcallback(arg, type, data):
  18         print callbacktypes[type]+': '+triple(data)
  19
  20 def triple((a, b, c)):
  21         return zfill(a) + ':' + zfill(b) + ':' + zfill(c)
  22
  23 def zfill(n):
  24         s = `n`
  25         return '0' * (2 - len(s)) + s
  26
  27 def prtrackinfo(info):
  28         for i in range(len(info)):
  29                 start, total = info[i]
  30                 print 'Track', zfill(i+1), triple(start), triple(total)
  31
  32 statedict = ['ERROR', 'NODISK', 'READY', 'PLAYING', 'PAUSED', 'STILL']
  33
  34 def prstatus(status):
  35         state, track, curtime, abstime, totaltime, first, last, \
  36                 scsi_audio, cur_block, dummy = status
  37         print 'Status:',
  38         if 0 <= state < len(statedict):
  39                 print statedict[state]
  40         else:
  41                 print state
  42         print 'Track: ', track
  43         print 'Time:  ', triple(curtime)
  44         print 'Abs:   ', triple(abstime)
  45         print 'Total: ', triple(totaltime)
  46         print 'First: ', first
  47         print 'Last:  ', last
  48         print 'SCSI:  ', scsi_audio
  49         print 'Block: ', cur_block
  50         print 'Future:', dummy
  51
  52 def main():
  53         import sys, readcd, al, AL, cd, cdplayer
  54         verbose = 0
  55         r = readcd.Readcd()
  56         prstatus(r.getstatus())
  57         prtrackinfo(r.gettrackinfo())
  58         cdinfo = cdplayer.Cdplayer(r.gettrackinfo())
  59         if cdinfo.title <> '':
  60                 print 'Title: "' + cdinfo.title + '"'
  61         if cdinfo.artist <> '':
  62                 print 'Artist: ' + cdinfo.artist
  63         for arg in sys.argv[1:]:
  64                 if arg == '-v':
  65                         verbose = 1
  66                         continue
  67                 x = eval(arg)
  68                 try:
  69                         l = len(x)
  70                         r.appendstretch(x[0], x[1])
  71                 except TypeError:
  72                         r.appendtrack(x)
  73         try:
  74                 oldparams = [AL.OUTPUT_RATE, 0]
  75                 params = oldparams[:]
  76                 al.getparams(AL.DEFAULT_DEVICE, oldparams)
  77                 params[1] = AL.RATE_44100
  78                 al.setparams(AL.DEFAULT_DEVICE, params)
  79                 config = al.newconfig()
  80                 config.setwidth(AL.SAMPLE_16)
  81                 config.setchannels(AL.STEREO)
  82                 port = al.openport('CD Player', 'w', config)
  83
  84                 for i in range(8):
  85                         r.setcallback(i, callback, None)
  86                 if verbose:
  87                         r.setcallback(cd.ptime, tcallback, None)
  88                         r.setcallback(cd.atime, tcallback, None)
  89                 else:
  90                         r.removecallback(cd.ptime)
  91                         r.removecallback(cd.atime)
  92                 r.setcallback(cd.pnum, prtrack, cdinfo)
  93                 r.setcallback(cd.audio, playaudio, port)
  94
  95                 data = r.play()
  96         except KeyboardInterrupt:
  97                 status = r.getstatus()
  98                 print 'Interrupted at '+triple(status[2])+' into track '+ \
  99                           `status[1]`+' (absolute time '+triple(status[3])+')'
 100         al.setparams(AL.DEFAULT_DEVICE, oldparams)
 101
 102 main()