My application (see code snippet) sometimes crashes deep in [QTMovie
setMovie] when I use 'callBackAtTime', the crash goes away when
using 'callBackAtTime | callBackAtInterrupt' and
performSelectorOnMainThread.
It looks suspeciously like some weird threading issue.
Does Quicktime call the callback-routine on the mainthread when
using 'callBackAtTime'?
I've also found a bug, the callback-routine (CallMeWhen returns
noErr) is never called when using 'callBackAtTime |
callBackAtDeferredTask'.
-------
void NextMovieCallBack(QTCallBack cb, long refCon)
{
#ifdef RANDOMCRASH
[(MainController*)refCon startNextMovie: nil];
#else
[(NSObject*)refCon performSelectorOnMainThread:
@selector(startNextMovie:) withObject: nil waitUntilDone: NO];
#endif
}
-(void) startNextMovie: (id) sender
{
[self startMovie: [self getNextMovie]];
}
-(void) startMovie: (QTMovie*) movie
{
if(!callBackProcUPPL) {
callBackProcUPP = NewQTCallBackUPP(NextMovieCallBack);
}
if(movieCallBack) {
// cancel & dispose the previous callback
DisposeCallBack(movieCallBack);
movieCallBack = 0;
}
if(movie) {
#ifdef RANDOMCRASH
movieCallBack = NewCallBack(GetMovieTimeBase([movie
quickTimeMovie]), callBackAtTime);
#else
movieCallBack = NewCallBack(GetMovieTimeBase([movie
quickTimeMovie]), callBackAtTime | callBackAtInterrupt);
#endif
CallMeWhen(movieCallBack, callBackProcUPP,(long)self,
triggerTimeFwd, 10*[movie duration].timeScale, [movie
duration].timeScale);
}
[movieView setMovie: movie]; <-- crashes here
}
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