| # Class interface to the CD module. |
| from warnings import warnpy3k |
| warnpy3k("the readcd module has been removed in Python 3.0", stacklevel=2) |
| del warnpy3k |
| |
| 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 |
