Re: [Live-devel] AAC/H264 Closing Down

Goran Ambardziev Thu, 24 Apr 2014 17:28:25 -0700

Hello Warren and thanks.

>/  On this line VS says: "HEAP: Free Heap block 3043560 modified at 304361c
/>/  after it was freed"
/
What does the stack trace look like when this happens?

Here's the call stack:

MFVideoGenerator Test.exe!_free_base(void * pBlock=0x039505f8)Line 109 + 0x12 bytes CMFVideoGenerator Test.exe!_free_dbg_nolock(void *pUserData=0x03950618, int nBlockUse=0x00000001) Line 1426 + 0x9bytes C++MFVideoGenerator Test.exe!_free_dbg(void * pUserData=0x03950618,int nBlockUse=0x00000001) Line 1258 + 0xd bytes C++MFVideoGenerator Test.exe!operator delete(void * p=0x03950618)Line 373 + 0xb bytes C++MFVideoGenerator Test.exe!BasicHashTable::`scalar deletingdestructor'() + 0x3c bytes C++MFVideoGeneratorTest.exe!RTCPMemberDatabase::~RTCPMemberDatabase() Line 35 + 0x37bytes C++MFVideoGenerator Test.exe!RTCPMemberDatabase::`scalar deletingdestructor'() + 0x2b bytes C++MFVideoGenerator Test.exe!RTCPInstance::~RTCPInstance() Line 194+ 0x3a bytes C++MFVideoGenerator Test.exe!RTCPInstance::`scalar deletingdestructor'() + 0x2b bytes C++MFVideoGenerator Test.exe!MediaLookupTable::remove(const char *name=0x0398bcb8) Line 151 + 0x35 bytes C++MFVideoGenerator Test.exe!Medium::close(UsageEnvironment &env={...}, const char * name=0x0398bcb8) Line 54 C++MFVideoGenerator Test.exe!Medium::close(Medium *medium=0x0398bcb0) Line 59 + 0x17 bytes C++MFVideoGeneratorTest.exe!CMulticastH264Streamer::StreamerThread() Line 232 + 0xcbytes C++

It sounds like the opposite of a leak, where you're either
double-free'ing something or freeing something too early.

I posted the code in the first post in this thread. Basically,everything is in one thread (StreamerThread from the stack) and fortesting I disabled any methods that are called from otherthreads from outside (basically, threads that add H264/AAC data to thesources).

Can you run the app on Linux?  If your app has a GUI, you should be able
to strip out the core of the app so that it will build and run on Linux
without the GUI.  (If not, it means you have application logic mixed in
with your display code, which is bad design from the start.)

I have couple of abstraction layers in separate libs until the code isused by GUI (which is there (the GUI) for testing purposes only).live555 is wrapped in separate lib, then one MediaFoundation componentthat uses it, thenMediaFoundation component(lib) that creates and run the stream flow etc.Unfortunately, I cannot run the app on linux, because I do not have anydeveloper experience with it, nor can I run MediaFoundation componentfor encoding H264/AAC in linux.



Anyway, if you could look, here's my code from StreamerThread

    // Begin by setting up our usage environment:

    // Create 'groupsocks' for RTP and RTCP:

    // Create RTSP server

    // Create server media session

    // Video stream groupsock's

    RTCPInstance* rtcp = NULL;
    // Add H264 stream
    if( m_settings.VideoStream )
    {
        // Create a 'H264 Video RTP' sink from the RTP 'groupsock':

        // Create (and start) a 'RTCP instance' for this RTP sink:

sms->addSubsession( PassiveServerMediaSubsession::createNew(*m_pRtpVideoSink, rtcp ) );

    }

    // Audio stream groupsock's

    RTCPInstance* rtcpAudio = NULL;

    // Add AAC Stream
    if( m_settings.AudioStream )
    {
        // Create (and start) a 'RTCP instance' for this RTP sink:

sms->addSubsession( PassiveServerMediaSubsession::createNew(*m_pRtpAudioSink, rtcpAudio ) );

    }

    rtspServer->addServerMediaSession( sms );

    // Get the streaming URL
    m_streamingURL = rtspServer->rtspURL( sms );

*m_pUsageEnv << "Play this stream using the URL \"" <<m_streamingURL << "\"\n";


    if( m_settings.VideoStream )
    {

m_pH264FramedSource = CH264FramedSource::createNew(*m_pUsageEnv, 0, 40000 );


        FramedSource* framedSource = m_pH264FramedSource;

m_pH264DiscreteFramer =H264VideoStreamDiscreteFramer::createNew( *m_pUsageEnv, framedSource );

m_pRtpVideoSink->startPlaying( *m_pH264DiscreteFramer,afterPlayback, this );

    }

    if( m_settings.AudioStream )
    {
        timeval pTime;
        if( m_settings.VideoStream )
        {
            m_pH264FramedSource->GetPresentationTime(pTime);
        }

m_pAacFrameedSource = AACFramedSource::createNew( *m_pUsageEnv,0, 40000, pTime );

m_pRtpAudioSink->startPlaying( *m_pAacFrameedSource,afterPlayback, this );

m_pUsageEnv->taskScheduler().doEventLoop( &m_doneFlag ); // doesnot return


    // Close everything
    //
    if(m_pRtpVideoSink != NULL)
    {
        m_pRtpVideoSink->stopPlaying();
    }
    if(m_pRtpAudioSink != NULL)
    {
        m_pRtpAudioSink->stopPlaying();
    }

    Medium::close( m_pRtpVideoSink );
    Medium::close( m_pRtpAudioSink );

    Medium::close( m_pH264FramedSource );
    Medium::close( m_pAacFrameedSource );

    Medium::close(rtcp);
    Medium::close(rtcpAudio);

    rtpVideoGroupsock->removeAllDestinations();
    rtcpVideoGroupsock->removeAllDestinations();
    delete rtpVideoGroupsock;
    delete rtcpVideoGroupsock;

    rtpAudioGroupsock->removeAllDestinations();
    rtcpAudioGroupsock->removeAllDestinations();
    delete rtpAudioGroupsock;
    delete rtcpAudioGroupsock;

    Medium::close(rtspServer);

    m_pUsageEnv->reclaim();

    delete scheduler;

    SetEvent( m_hCloseEvt );

Thanks.

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