Lib/plat-irix5/readcd.py

   1 # Class interface to the CD module.
   2 from warnings import warnpy3k
   3 warnpy3k("the readcd module has been removed in Python 3.0", stacklevel=2)
   4 del warnpy3k
   5
   6 import cd, CD
   7
   8 class Error(Exception):
   9     pass
  10 class _Stop(Exception):
  11     pass
  12
  13 def _doatime(self, cb_type, data):
  14     if ((data[0] * 60) + data[1]) * 75 + data[2] > self.end:
  15 ##              print 'done with list entry', repr(self.listindex)
  16         raise _Stop
  17     func, arg = self.callbacks[cb_type]
  18     if func:
  19         func(arg, cb_type, data)
  20
  21 def _dopnum(self, cb_type, data):
  22     if data > self.end:
  23 ##              print 'done with list entry', repr(self.listindex)
  24         raise _Stop
  25     func, arg = self.callbacks[cb_type]
  26     if func:
  27         func(arg, cb_type, data)
  28
  29 class Readcd:
  30     def __init__(self, *arg):
  31         if len(arg) == 0:
  32             self.player = cd.open()
  33         elif len(arg) == 1:
  34             self.player = cd.open(arg[0])
  35         elif len(arg) == 2:
  36             self.player = cd.open(arg[0], arg[1])
  37         else:
  38             raise Error, 'bad __init__ call'
  39         self.list = []
  40         self.callbacks = [(None, None)] * 8
  41         self.parser = cd.createparser()
  42         self.playing = 0
  43         self.end = 0
  44         self.status = None
  45         self.trackinfo = None
  46
  47     def eject(self):
  48         self.player.eject()
  49         self.list = []
  50         self.end = 0
  51         self.listindex = 0
  52         self.status = None
  53         self.trackinfo = None
  54         if self.playing:
  55 ##                      print 'stop playing from eject'
  56             raise _Stop
  57
  58     def pmsf2msf(self, track, min, sec, frame):
  59         if not self.status:
  60             self.cachestatus()
  61         if track < self.status[5] or track > self.status[6]:
  62             raise Error, 'track number out of range'
  63         if not self.trackinfo:
  64             self.cacheinfo()
  65         start, total = self.trackinfo[track]
  66         start = ((start[0] * 60) + start[1]) * 75 + start[2]
  67         total = ((total[0] * 60) + total[1]) * 75 + total[2]
  68         block = ((min * 60) + sec) * 75 + frame
  69         if block > total:
  70             raise Error, 'out of range'
  71         block = start + block
  72         min, block = divmod(block, 75*60)
  73         sec, frame = divmod(block, 75)
  74         return min, sec, frame
  75
  76     def reset(self):
  77         self.list = []
  78
  79     def appendtrack(self, track):
  80         self.appendstretch(track, track)
  81
  82     def appendstretch(self, start, end):
  83         if not self.status:
  84             self.cachestatus()
  85         if not start:
  86             start = 1
  87         if not end:
  88             end = self.status[6]
  89         if type(end) == type(0):
  90             if end < self.status[5] or end > self.status[6]:
  91                 raise Error, 'range error'
  92         else:
  93             l = len(end)
  94             if l == 4:
  95                 prog, min, sec, frame = end
  96                 if prog < self.status[5] or prog > self.status[6]:
  97                     raise Error, 'range error'
  98                 end = self.pmsf2msf(prog, min, sec, frame)
  99             elif l != 3:
 100                 raise Error, 'syntax error'
 101         if type(start) == type(0):
 102             if start < self.status[5] or start > self.status[6]:
 103                 raise Error, 'range error'
 104             if len(self.list) > 0:
 105                 s, e = self.list[-1]
 106                 if type(e) == type(0):
 107                     if start == e+1:
 108                         start = s
 109                         del self.list[-1]
 110         else:
 111             l = len(start)
 112             if l == 4:
 113                 prog, min, sec, frame = start
 114                 if prog < self.status[5] or prog > self.status[6]:
 115                     raise Error, 'range error'
 116                 start = self.pmsf2msf(prog, min, sec, frame)
 117             elif l != 3:
 118                 raise Error, 'syntax error'
 119         self.list.append((start, end))
 120
 121     def settracks(self, list):
 122         self.list = []
 123         for track in list:
 124             self.appendtrack(track)
 125
 126     def setcallback(self, cb_type, func, arg):
 127         if cb_type < 0 or cb_type >= 8:
 128             raise Error, 'type out of range'
 129         self.callbacks[cb_type] = (func, arg)
 130         if self.playing:
 131             start, end = self.list[self.listindex]
 132             if type(end) == type(0):
 133                 if cb_type != CD.PNUM:
 134                     self.parser.setcallback(cb_type, func, arg)
 135             else:
 136                 if cb_type != CD.ATIME:
 137                     self.parser.setcallback(cb_type, func, arg)
 138
 139     def removecallback(self, cb_type):
 140         if cb_type < 0 or cb_type >= 8:
 141             raise Error, 'type out of range'
 142         self.callbacks[cb_type] = (None, None)
 143         if self.playing:
 144             start, end = self.list[self.listindex]
 145             if type(end) == type(0):
 146                 if cb_type != CD.PNUM:
 147                     self.parser.removecallback(cb_type)
 148             else:
 149                 if cb_type != CD.ATIME:
 150                     self.parser.removecallback(cb_type)
 151
 152     def gettrackinfo(self, *arg):
 153         if not self.status:
 154             self.cachestatus()
 155         if not self.trackinfo:
 156             self.cacheinfo()
 157         if len(arg) == 0:
 158             return self.trackinfo[self.status[5]:self.status[6]+1]
 159         result = []
 160         for i in arg:
 161             if i < self.status[5] or i > self.status[6]:
 162                 raise Error, 'range error'
 163             result.append(self.trackinfo[i])
 164         return result
 165
 166     def cacheinfo(self):
 167         if not self.status:
 168             self.cachestatus()
 169         self.trackinfo = []
 170         for i in range(self.status[5]):
 171             self.trackinfo.append(None)
 172         for i in range(self.status[5], self.status[6]+1):
 173             self.trackinfo.append(self.player.gettrackinfo(i))
 174
 175     def cachestatus(self):
 176         self.status = self.player.getstatus()
 177         if self.status[0] == CD.NODISC:
 178             self.status = None
 179             raise Error, 'no disc in player'
 180
 181     def getstatus(self):
 182         return self.player.getstatus()
 183
 184     def play(self):
 185         if not self.status:
 186             self.cachestatus()
 187         size = self.player.bestreadsize()
 188         self.listindex = 0
 189         self.playing = 0
 190         for i in range(8):
 191             func, arg = self.callbacks[i]
 192             if func:
 193                 self.parser.setcallback(i, func, arg)
 194             else:
 195                 self.parser.removecallback(i)
 196         if len(self.list) == 0:
 197             for i in range(self.status[5], self.status[6]+1):
 198                 self.appendtrack(i)
 199         try:
 200             while 1:
 201                 if not self.playing:
 202                     if self.listindex >= len(self.list):
 203                         return
 204                     start, end = self.list[self.listindex]
 205                     if type(start) == type(0):
 206                         dummy = self.player.seektrack(
 207                                 start)
 208                     else:
 209                         min, sec, frame = start
 210                         dummy = self.player.seek(
 211                                 min, sec, frame)
 212                     if type(end) == type(0):
 213                         self.parser.setcallback(
 214                                 CD.PNUM, _dopnum, self)
 215                         self.end = end
 216                         func, arg = \
 217                               self.callbacks[CD.ATIME]
 218                         if func:
 219                             self.parser.setcallback(CD.ATIME, func, arg)
 220                         else:
 221                             self.parser.removecallback(CD.ATIME)
 222                     else:
 223                         min, sec, frame = end
 224                         self.parser.setcallback(
 225                                 CD.ATIME, _doatime,
 226                                 self)
 227                         self.end = (min * 60 + sec) * \
 228                                    75 + frame
 229                         func, arg = \
 230                               self.callbacks[CD.PNUM]
 231                         if func:
 232                             self.parser.setcallback(CD.PNUM, func, arg)
 233                         else:
 234                             self.parser.removecallback(CD.PNUM)
 235                     self.playing = 1
 236                 data = self.player.readda(size)
 237                 if data == '':
 238                     self.playing = 0
 239                     self.listindex = self.listindex + 1
 240                     continue
 241                 try:
 242                     self.parser.parseframe(data)
 243                 except _Stop:
 244                     self.playing = 0
 245                     self.listindex = self.listindex + 1
 246         finally:
 247             self.playing = 0