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