ref: 02e6003fc87ca7ace27beef200813426dd954852
dir: /sys/lib/python/plat-irix5/readcd.py/
# Class interface to the CD module. import cd, CD class Error(Exception): pass class _Stop(Exception): pass def _doatime(self, cb_type, data): if ((data[0] * 60) + data[1]) * 75 + data[2] > self.end: ## print 'done with list entry', repr(self.listindex) raise _Stop func, arg = self.callbacks[cb_type] if func: func(arg, cb_type, data) def _dopnum(self, cb_type, data): if data > self.end: ## print 'done with list entry', repr(self.listindex) raise _Stop func, arg = self.callbacks[cb_type] if func: func(arg, cb_type, data) class Readcd: def __init__(self, *arg): if len(arg) == 0: self.player = cd.open() elif len(arg) == 1: self.player = cd.open(arg[0]) elif len(arg) == 2: self.player = cd.open(arg[0], arg[1]) else: raise Error, 'bad __init__ call' self.list = [] self.callbacks = [(None, None)] * 8 self.parser = cd.createparser() self.playing = 0 self.end = 0 self.status = None self.trackinfo = None def eject(self): self.player.eject() self.list = [] self.end = 0 self.listindex = 0 self.status = None self.trackinfo = None if self.playing: ## print 'stop playing from eject' raise _Stop def pmsf2msf(self, track, min, sec, frame): if not self.status: self.cachestatus() if track < self.status[5] or track > self.status[6]: raise Error, 'track number out of range' if not self.trackinfo: self.cacheinfo() start, total = self.trackinfo[track] start = ((start[0] * 60) + start[1]) * 75 + start[2] total = ((total[0] * 60) + total[1]) * 75 + total[2] block = ((min * 60) + sec) * 75 + frame if block > total: raise Error, 'out of range' block = start + block min, block = divmod(block, 75*60) sec, frame = divmod(block, 75) return min, sec, frame def reset(self): self.list = [] def appendtrack(self, track): self.appendstretch(track, track) def appendstretch(self, start, end): if not self.status: self.cachestatus() if not start: start = 1 if not end: end = self.status[6] if type(end) == type(0): if end < self.status[5] or end > self.status[6]: raise Error, 'range error' else: l = len(end) if l == 4: prog, min, sec, frame = end if prog < self.status[5] or prog > self.status[6]: raise Error, 'range error' end = self.pmsf2msf(prog, min, sec, frame) elif l != 3: raise Error, 'syntax error' if type(start) == type(0): if start < self.status[5] or start > self.status[6]: raise Error, 'range error' if len(self.list) > 0: s, e = self.list[-1] if type(e) == type(0): if start == e+1: start = s del self.list[-1] else: l = len(start) if l == 4: prog, min, sec, frame = start if prog < self.status[5] or prog > self.status[6]: raise Error, 'range error' start = self.pmsf2msf(prog, min, sec, frame) elif l != 3: raise Error, 'syntax error' self.list.append((start, end)) def settracks(self, list): self.list = [] for track in list: self.appendtrack(track) def setcallback(self, cb_type, func, arg): if cb_type < 0 or cb_type >= 8: raise Error, 'type out of range' self.callbacks[cb_type] = (func, arg) if self.playing: start, end = self.list[self.listindex] if type(end) == type(0): if cb_type != CD.PNUM: self.parser.setcallback(cb_type, func, arg) else: if cb_type != CD.ATIME: self.parser.setcallback(cb_type, func, arg) def removecallback(self, cb_type): if cb_type < 0 or cb_type >= 8: raise Error, 'type out of range' self.callbacks[cb_type] = (None, None) if self.playing: start, end = self.list[self.listindex] if type(end) == type(0): if cb_type != CD.PNUM: self.parser.removecallback(cb_type) else: if cb_type != CD.ATIME: self.parser.removecallback(cb_type) def gettrackinfo(self, *arg): if not self.status: self.cachestatus() if not self.trackinfo: self.cacheinfo() if len(arg) == 0: return self.trackinfo[self.status[5]:self.status[6]+1] result = [] for i in arg: if i < self.status[5] or i > self.status[6]: raise Error, 'range error' result.append(self.trackinfo[i]) return result def cacheinfo(self): if not self.status: self.cachestatus() self.trackinfo = [] for i in range(self.status[5]): self.trackinfo.append(None) for i in range(self.status[5], self.status[6]+1): self.trackinfo.append(self.player.gettrackinfo(i)) def cachestatus(self): self.status = self.player.getstatus() if self.status[0] == CD.NODISC: self.status = None raise Error, 'no disc in player' def getstatus(self): return self.player.getstatus() def play(self): if not self.status: self.cachestatus() size = self.player.bestreadsize() self.listindex = 0 self.playing = 0 for i in range(8): func, arg = self.callbacks[i] if func: self.parser.setcallback(i, func, arg) else: self.parser.removecallback(i) if len(self.list) == 0: for i in range(self.status[5], self.status[6]+1): self.appendtrack(i) try: while 1: if not self.playing: if self.listindex >= len(self.list): return start, end = self.list[self.listindex] if type(start) == type(0): dummy = self.player.seektrack( start) else: min, sec, frame = start dummy = self.player.seek( min, sec, frame) if type(end) == type(0): self.parser.setcallback( CD.PNUM, _dopnum, self) self.end = end func, arg = \ self.callbacks[CD.ATIME] if func: self.parser.setcallback(CD.ATIME, func, arg) else: self.parser.removecallback(CD.ATIME) else: min, sec, frame = end self.parser.setcallback( CD.ATIME, _doatime, self) self.end = (min * 60 + sec) * \ 75 + frame func, arg = \ self.callbacks[CD.PNUM] if func: self.parser.setcallback(CD.PNUM, func, arg) else: self.parser.removecallback(CD.PNUM) self.playing = 1 data = self.player.readda(size) if data == '': self.playing = 0 self.listindex = self.listindex + 1 continue try: self.parser.parseframe(data) except _Stop: self.playing = 0 self.listindex = self.listindex + 1 finally: self.playing = 0