Hi,
I'm trying to write a DirectShow(DS acronyms) Source Filter that will
send the test.m4e (from live tests) over RTSP to VLC player.
In my CRTSPFilter::Run DS method of my DirectShow filter I'm creating a
new thread that follows testOnDemandRTSPServer.cpp
Except it addSubsession my MPEG4VideoLiveServerMediaSubsession
subsession
char const* streamName = "mpeg4ESVideoTest";
ServerMediaSession* sms = ServerMediaSession::createNew(*env,
streamName, streamName, descriptionString);
MPEG4VideoLiveServerMediaSubsession* mP4LiveSms =
MPEG4VideoLiveServerMediaSubsession::createNew(*env, streamName,
reuseFirstSource);
sms->addSubsession(mP4LiveSms);
rtspServer->addServerMediaSession(sms);
announceStreamLive(rtspServer, sms, streamName);
also instead of env->taskScheduler().doEventLoop(); // does not return
Tried to use the fWatchVariable the synchronized between 2 threads(1) DS
Graph,2) My testOnDemandRTSPServer ) when I'm getting new data
(IMediaSample) from the DS Filter I'm setting WatchVariable=1.
Question #1: How should Notify MPEG4LiveSource::doGetNextFrame ?
while(true)
{
fWatchVariable = 0;
dummyTask(NULL); // 100 ms to awake a sleeping server.
env->taskScheduler().doEventLoop(&fWatchVariable);
if (fWatchVariable =1)
{
// How to Invoke MPEG4LiveSource::doGetNextFrame?
printf("\nEventThrown=%d,",fWatchVariable);
}
}
Following live FAQ and testOnDemandRTSPServer I subclass the following
classes:
MPEG4LiveServerMediaSubsession : public OnDemandServerMediaSubsession
and MPEG4LiveSource : public FramedSource.
Observing MPEG4VideoFileServerMediaSubsession I Implement
createNewStreamSource :
FramedSource
<http://www.live555.com/liveMedia/doxygen/html/classFramedSource.html> *
MPEG4VideoFileServerMediaSubsession
<http://www.live555.com/liveMedia/doxygen/html/classMPEG4VideoFileServer
MediaSubsession.html#dea3048c120932abeac4c9ffd7fc2fa4>
::createNewStreamSource
<http://www.live555.com/liveMedia/doxygen/html/classMPEG4VideoFileServer
MediaSubsession.html#dea3048c120932abeac4c9ffd7fc2fa4> (unsigned
/*clientSessionId*/, unsigned& estBitrate)
{
estBitrate = 500; // kbps, estimate
DeviceParamters *params = new DeviceParamters(); // Empty not uses
// Create the video source:
MPEG4LiveSource * mpeg4LiveSource = MPEG4LiveSource::createNew
<http://www.live555.com/liveMedia/doxygen/html/classByteStreamFileSource
.html#56c59cbcdf5c0bda78ece747037c6ff0> (envir
<http://www.live555.com/liveMedia/doxygen/html/classMedium.html#df197ac4
3716f54ffaa5c30c282cf767> (),params);
if (mpeg4LiveSource == NULL
<http://www.live555.com/liveMedia/doxygen/html/UsageEnvironment_8hh.html
#070d2ce7b6bb7e5c05602aa8c308d0c4> ) return NULL
<http://www.live555.com/liveMedia/doxygen/html/UsageEnvironment_8hh.html
#070d2ce7b6bb7e5c05602aa8c308d0c4> ;
// fFileSize
<http://www.live555.com/liveMedia/doxygen/html/classFileServerMediaSubse
ssion.html#cb1211712e0a6328f2acad830d898bf6> = fileSource->fileSize
<http://www.live555.com/liveMedia/doxygen/html/classByteStreamFileSource
.html#bca441959007427a78e9d802e3bf2d16> (); Not used getting frames
from DS filter
// Create a framer for the Video Elementary Stream:
return MPEG4VideoStreamFramer::createNew
<http://www.live555.com/liveMedia/doxygen/html/classMPEG4VideoStreamFram
er.html#d9e0d387596bc7c94591b9c0b25a2b06> (envir
<http://www.live555.com/liveMedia/doxygen/html/classMedium.html#df197ac4
3716f54ffaa5c30c282cf767> (),mpeg4LiveSource);
}
Is the same in MPEG4VideoFileServerMediaSubsession:
RTPSink*
MPEG4VideoLiveServerMediaSubsession::createNewRTPSink(Groupsock*
rtpGroupsock,
unsigned char
rtpPayloadTypeIfDynamic,
FramedSource* /*inputSource*/) {
return MPEG4ESVideoRTPSink::createNew(envir(), rtpGroupsock,
rtpPayloadTypeIfDynamic);
}
Question #2: Is It ok to use MPEG4VideoStreamFramer or should I use
MPEG4VideoStreamDiscreteFramer in order to parse test.m4e file.?
void MPEG4LiveSource::doGetNextFrame() {
if (!isCurrentlyAwaitingData())
return; // we're not ready for the
data yet
// WaitForSingleObject( hEvent, INFINITE ); // Question
#3: Try to sync both thread Ignoring TaskScheduler::doEventLoop()
<http://www.live555.com/liveMedia/doxygen/html/classTaskScheduler.html>
, is that recommendable?
if (lGActualDataLength < fMaxSize) {
memcpy(fTo,pbGReadBuffer,lGActualDataLength);
}
else {
fNumTruncatedBytes = lGActualDataLength
- fMaxSize;
}
fFrameSize = lGActualDataLength;
gettimeofday(&fPresentationTime,NULL);
fDurationInMicroseconds = 1000000 / 25; // 25 fps
nextTask() =
envir().taskScheduler().scheduleDelayedTask(0,(TaskFunc*)FramedSource::a
fterGetting, this); // Question #4: Is that good to call suitable
here?
}
Question #5: Run over the Mailing list I could not found any example of
streaming from DirectShopw filter, Is there a problem with that
approach?
Thanks,
Shveky Eyal
Software Engineer at Aeronautics
E-Mail: ey...@aeronautics-sys.com <mailto:ey...@aeronautics-sys.com>
Ext: +972-8-9433600 #731
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