> I have been playing with the FramedFilter class for a while, and created a
> simple filter that will just deliver its input to its output. However, it is
> not working for some reason. Can you point me to the point that I'm missing?
[...]
> void HistoryFilter::doGetNextFrame()
> {
> fFrameSize=0;
You don't need to do this here (although it does no harm), because you are
(properly) setting "fFrameSize" later, in your 'after getting' function.
> void HistoryFilter::afterGettingFrame(void* clientData, unsigned
> frameSize, unsigned /*numTruncatedBytes*/, struct timeval
> presentationTime, unsigned /*durationInMicroseconds*/)
> {
> HistoryFilter* filter = (HistoryFilter*)clientData;
> filter->afterGettingFrame1(frameSize, presentationTime);
> }
>
> void HistoryFilter::afterGettingFrame1(unsigned frameSize, struct timeval
> presentationTime)
> {
> fFrameSize = frameSize;
> fPresentationTime = presentationTime;
> afterGetting(this);
> }
Your filter also needs to be setting "fNumTruncatedBytes" and
"fDurationInMicroseconds" (in your case, because you're making a direct copy,
these will be the values of the "numTruncatedBytes" and
"durationInMicroseconds" parameters, respectively).
> In my main server play() function, I put in this code:
>
> FramedSource* videoES = fileSource;
> // Create a framer for the Video Elementary Stream:
> videoSource = MPEG4VideoStreamFramer::createNew(*env, videoES);
> historyFilter = HistoryFilter::createNew(*env, videoSource, "history.mp4");
> // Finally, start playing:
> *env << "Beginning to read from file...\n";
> videoSink->startPlaying(*historyFilter, afterPlaying, videoSink);
That looks fine - but don't forget to enter the event loop, by calling
env->taskScheduler().doEventLoop();
at the end of this code, otherwise nothing will happen. (In a LIVE555-based
application, almost everything gets done within the event loop).
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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