cpython/Demo/sgi/cd/playcd.py

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# Play CD audio on speaker or headphones.
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callbacktypes = ['audio','pnum','index','ptime','atime','catalog','ident','control']
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def playaudio(port, type, audio):
port.writesamps(audio)
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def prtrack(cdinfo, type, pnum):
if cdinfo.track[pnum] <> '':
print 'playing "' + cdinfo.track[pnum] + '"'
else:
print callbacktypes[type]+': '+`pnum`
def callback(arg, type, data):
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print callbacktypes[type]+': '+`data`
def tcallback(arg, type, data):
print callbacktypes[type]+': '+triple(data)
def triple((a, b, c)):
return zfill(a) + ':' + zfill(b) + ':' + zfill(c)
def zfill(n):
s = `n`
return '0' * (2 - len(s)) + s
def prtrackinfo(info):
for i in range(len(info)):
start, total = info[i]
print 'Track', zfill(i+1), triple(start), triple(total)
statedict = ['ERROR', 'NODISK', 'READY', 'PLAYING', 'PAUSED', 'STILL']
def prstatus(status):
state, track, curtime, abstime, totaltime, first, last, \
scsi_audio, cur_block, dummy = status
print 'Status:',
if 0 <= state < len(statedict):
print statedict[state]
else:
print state
print 'Track: ', track
print 'Time: ', triple(curtime)
print 'Abs: ', triple(abstime)
print 'Total: ', triple(totaltime)
print 'First: ', first
print 'Last: ', last
print 'SCSI: ', scsi_audio
print 'Block: ', cur_block
print 'Future:', dummy
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def main():
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import sys, readcd, al, AL, CD, cdplayer
verbose = 0
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r = readcd.Readcd()
prstatus(r.getstatus())
prtrackinfo(r.gettrackinfo())
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cdinfo = cdplayer.Cdplayer(r.gettrackinfo())
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if cdinfo.title <> '':
print 'Title: "' + cdinfo.title + '"'
if cdinfo.artist <> '':
print 'Artist: ' + cdinfo.artist
for arg in sys.argv[1:]:
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if arg == '-v':
verbose = 1
continue
x = eval(arg)
try:
l = len(x)
r.appendstretch(x[0], x[1])
except TypeError:
r.appendtrack(x)
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try:
oldparams = [AL.OUTPUT_RATE, 0]
params = oldparams[:]
al.getparams(AL.DEFAULT_DEVICE, oldparams)
params[1] = AL.RATE_44100
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al.setparams(AL.DEFAULT_DEVICE, params)
config = al.newconfig()
config.setwidth(AL.SAMPLE_16)
config.setchannels(AL.STEREO)
port = al.openport('CD Player', 'w', config)
for i in range(8):
r.setcallback(i, callback, None)
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if verbose:
r.setcallback(CD.PTIME, tcallback, None)
r.setcallback(CD.ATIME, tcallback, None)
else:
r.removecallback(CD.PTIME)
r.removecallback(CD.ATIME)
r.setcallback(CD.PNUM, prtrack, cdinfo)
r.setcallback(CD.AUDIO, playaudio, port)
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data = r.play()
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except KeyboardInterrupt:
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status = r.getstatus()
print 'Interrupted at '+triple(status[2])+' into track '+ \
`status[1]`+' (absolute time '+triple(status[3])+')'
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al.setparams(AL.DEFAULT_DEVICE, oldparams)
main()