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242 lines
6.1 KiB
Python
242 lines
6.1 KiB
Python
# Class interface to the CD module.
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import cd, CD
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Error = 'Readcd.Error'
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_Stop = 'Readcd.Stop'
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def _doatime(self, cb_type, data):
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if ((data[0] * 60) + data[1]) * 75 + data[2] > self.end:
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## print 'done with list entry',`self.listindex`
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raise _Stop
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func, arg = self.callbacks[cb_type]
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if func:
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func(arg, cb_type, data)
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def _dopnum(self, cb_type, data):
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if data > self.end:
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## print 'done with list entry',`self.listindex`
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raise _Stop
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func, arg = self.callbacks[cb_type]
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if func:
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func(arg, cb_type, data)
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class Readcd:
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def __init__(self, *arg):
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if len(arg) == 0:
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self.player = cd.open()
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elif len(arg) == 1:
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self.player = cd.open(arg[0])
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elif len(arg) == 2:
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self.player = cd.open(arg[0], arg[1])
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else:
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raise Error, 'bad __init__ call'
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self.list = []
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self.callbacks = [(None, None)] * 8
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self.parser = cd.createparser()
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self.playing = 0
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self.end = 0
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self.status = None
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self.trackinfo = None
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def eject(self):
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self.player.eject()
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self.list = []
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self.end = 0
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self.listindex = 0
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self.status = None
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self.trackinfo = None
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if self.playing:
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## print 'stop playing from eject'
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raise _Stop
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def pmsf2msf(self, track, min, sec, frame):
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if not self.status:
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self.cachestatus()
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if track < self.status[5] or track > self.status[6]:
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raise Error, 'track number out of range'
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if not self.trackinfo:
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self.cacheinfo()
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start, total = self.trackinfo[track]
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start = ((start[0] * 60) + start[1]) * 75 + start[2]
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total = ((total[0] * 60) + total[1]) * 75 + total[2]
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block = ((min * 60) + sec) * 75 + frame
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if block > total:
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raise Error, 'out of range'
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block = start + block
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min, block = divmod(block, 75*60)
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sec, frame = divmod(block, 75)
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return min, sec, frame
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def reset(self):
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self.list = []
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def appendtrack(self, track):
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self.appendstretch(track, track)
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def appendstretch(self, start, end):
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if not self.status:
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self.cachestatus()
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if not start:
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start = 1
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if not end:
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end = self.status[6]
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if type(end) == type(0):
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if end < self.status[5] or end > self.status[6]:
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raise Error, 'range error'
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else:
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l = len(end)
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if l == 4:
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prog, min, sec, frame = end
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if prog < self.status[5] or prog > self.status[6]:
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raise Error, 'range error'
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end = self.pmsf2msf(prog, min, sec, frame)
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elif l <> 3:
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raise Error, 'syntax error'
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if type(start) == type(0):
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if start < self.status[5] or start > self.status[6]:
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raise Error, 'range error'
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if len(self.list) > 0:
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s, e = self.list[-1]
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if type(e) == type(0):
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if start == e+1:
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start = s
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del self.list[-1]
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else:
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l = len(start)
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if l == 4:
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prog, min, sec, frame = start
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if prog < self.status[5] or prog > self.status[6]:
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raise Error, 'range error'
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start = self.pmsf2msf(prog, min, sec, frame)
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elif l <> 3:
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raise Error, 'syntax error'
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self.list.append((start, end))
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def settracks(self, list):
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self.list = []
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for track in list:
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self.appendtrack(track)
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def setcallback(self, cb_type, func, arg):
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if cb_type < 0 or cb_type >= 8:
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raise Error, 'type out of range'
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self.callbacks[cb_type] = (func, arg)
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if self.playing:
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start, end = self.list[self.listindex]
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if type(end) == type(0):
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if cb_type <> CD.PNUM:
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self.parser.setcallback(cb_type, func, arg)
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else:
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if cb_type <> CD.ATIME:
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self.parser.setcallback(cb_type, func, arg)
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def removecallback(self, cb_type):
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if cb_type < 0 or cb_type >= 8:
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raise Error, 'type out of range'
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self.callbacks[cb_type] = (None, None)
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if self.playing:
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start, end = self.list[self.listindex]
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if type(end) == type(0):
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if cb_type <> CD.PNUM:
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self.parser.removecallback(cb_type)
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else:
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if cb_type <> CD.ATIME:
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self.parser.removecallback(cb_type)
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def gettrackinfo(self, *arg):
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if not self.status:
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self.cachestatus()
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if not self.trackinfo:
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self.cacheinfo()
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if len(arg) == 0:
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return self.trackinfo[self.status[5]:self.status[6]+1]
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result = []
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for i in arg:
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if i < self.status[5] or i > self.status[6]:
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raise Error, 'range error'
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result.append(self.trackinfo[i])
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return result
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def cacheinfo(self):
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if not self.status:
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self.cachestatus()
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self.trackinfo = []
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for i in range(self.status[5]):
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self.trackinfo.append(None)
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for i in range(self.status[5], self.status[6]+1):
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self.trackinfo.append(self.player.gettrackinfo(i))
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def cachestatus(self):
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self.status = self.player.getstatus()
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if self.status[0] == CD.NODISC:
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self.status = None
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raise Error, 'no disc in player'
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def getstatus(self):
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return self.player.getstatus()
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def play(self):
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if not self.status:
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self.cachestatus()
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size = self.player.bestreadsize()
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self.listindex = 0
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self.playing = 0
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for i in range(8):
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func, arg = self.callbacks[i]
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if func:
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self.parser.setcallback(i, func, arg)
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else:
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self.parser.removecallback(i)
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if len(self.list) == 0:
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for i in range(self.status[5], self.status[6]+1):
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self.appendtrack(i)
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try:
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while 1:
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if not self.playing:
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if self.listindex >= len(self.list):
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return
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start, end = self.list[self.listindex]
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if type(start) == type(0):
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dummy = self.player.seektrack(
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start)
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else:
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min, sec, frame = start
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dummy = self.player.seek(
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min, sec, frame)
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if type(end) == type(0):
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self.parser.setcallback(
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CD.PNUM, _dopnum, self)
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self.end = end
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func, arg = \
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self.callbacks[CD.ATIME]
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if func:
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self.parser.setcallback(CD.ATIME, func, arg)
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else:
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self.parser.removecallback(CD.ATIME)
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else:
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min, sec, frame = end
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self.parser.setcallback(
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CD.ATIME, _doatime,
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self)
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self.end = (min * 60 + sec) * \
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75 + frame
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func, arg = \
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self.callbacks[CD.PNUM]
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if func:
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self.parser.setcallback(CD.PNUM, func, arg)
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else:
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self.parser.removecallback(CD.PNUM)
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self.playing = 1
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data = self.player.readda(size)
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if data == '':
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self.playing = 0
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self.listindex = self.listindex + 1
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continue
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try:
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self.parser.parseframe(data)
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except _Stop:
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self.playing = 0
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self.listindex = self.listindex + 1
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finally:
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self.playing = 0
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