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# Class interface to the CD module.
import cd, CD
Error = 'Readcd.Error'
_Stop = 'Readcd.Stop'
def _doatime(self, type, data):
if ((data[0] * 60) + data[1]) * 75 + data[2] > self.end:
## print 'done with list entry',`self.listindex`
raise _Stop
func, arg = self.callbacks[type]
if func:
func(arg, type, data)
def _dopnum(self, type, data):
if data > self.end:
## print 'done with list entry',`self.listindex`
raise _Stop
func, arg = self.callbacks[type]
if func:
func(arg, 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
return self
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]
try:
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'
except TypeError:
if end < self.status[5] or end > self.status[6]:
raise Error, 'range error'
try:
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'
except TypeError:
if start < self.status[5] or start > self.status[6]:
raise Error, 'range error'
if len(self.list) > 0:
s, e = self.list[-1]
try:
l = len(e)
except TypeError:
if start == e+1:
start = s
del self.list[-1]
self.list.append((start, end))
def settracks(self, list):
self.list = []
for track in list:
self.appendtrack(track)
def setcallback(self, type, func, arg):
if type < 0 or type >= 8:
raise Error, 'type out of range'
self.callbacks[type] = (func, arg)
if self.playing:
try:
l = len(end)
if type <> CD.ATIME:
self.parser.setcallback(type, func, arg)
except TypeError:
if type <> CD.PNUM:
self.parser.setcallback(type, func, arg)
def removecallback(self, type):
if type < 0 or type >= 8:
raise Error, 'type out of range'
self.callbacks[type] = (None, None)
if self.playing:
try:
l = len(end)
if type <> CD.ATIME:
self.parser.removecallback(type)
except TypeError:
if type <> CD.PNUM:
self.parser.removecallback(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)
while 1:
if not self.playing:
if self.listindex >= len(self.list):
return
start, end = self.list[self.listindex]
## print 'starting with',`(start, end)`
try:
min, sec, frame = start
dummy = self.player.seek(min, sec, frame)
except TypeError:
dummy = self.player.seektrack(start)
try:
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)
except TypeError:
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)
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
|
