C++ (Cpp) IMFMediaEventQueue Exemples

Exemple #1

Fichier : WavSource.cpp Projet : AbdoSalem95/WindowsSDK7-Samples

HRESULT WavSource::GetEvent(DWORD dwFlags, IMFMediaEvent** ppEvent)
{
    // NOTE: GetEvent can block indefinitely, so we don't hold the
    //       WavSource lock. This requires some juggling with the
    //       event queue pointer.

    HRESULT hr = S_OK;

    IMFMediaEventQueue *pQueue = NULL;

    EnterCriticalSection(&m_critSec);

    // Check shutdown
    hr = CheckShutdown();

    if (SUCCEEDED(hr))
    {
        pQueue = m_pEventQueue;
        pQueue->AddRef();
    }

    LeaveCriticalSection(&m_critSec);

    if (SUCCEEDED(hr))
    {   
        hr = pQueue->GetEvent(dwFlags, ppEvent);
    }

    SafeRelease(&pQueue);
    return hr;
}

Exemple #2

Fichier : WavSource.cpp Projet : AbdoSalem95/WindowsSDK7-Samples

HRESULT WavStream::GetEvent(DWORD dwFlags, IMFMediaEvent** ppEvent)
{
    HRESULT hr = S_OK;

    IMFMediaEventQueue *pQueue = NULL;
    
    EnterCriticalSection(&m_critSec);

    hr = CheckShutdown();

    if (SUCCEEDED(hr))
    {   
        pQueue = m_pEventQueue;
        pQueue->AddRef();
    }

    LeaveCriticalSection(&m_critSec);

    if (SUCCEEDED(hr))
    {   
        hr = pQueue->GetEvent(dwFlags, ppEvent);
    }

    SafeRelease(&pQueue);
    return hr;
}

Exemple #3

Fichier : MPEG1Stream.cpp Projet : Essjay1/Windows-classic-samples

HRESULT MPEG1Stream::GetEvent(DWORD dwFlags, IMFMediaEvent** ppEvent)
{
    HRESULT hr = S_OK;

    IMFMediaEventQueue *pQueue = NULL;

    { // scope for lock
      
        SourceLock lock(m_pSource);

        // Check shutdown
        CHECK_HR(hr = CheckShutdown());

        // Cache a local pointer to the queue.
        pQueue = m_pEventQueue;
        pQueue->AddRef();

    }   // release lock

    // Use the local pointer to call GetEvent.
    CHECK_HR(hr = pQueue->GetEvent(dwFlags, ppEvent));

done:
    SAFE_RELEASE(pQueue);
    return hr;
}

Exemple #4

Fichier : mftpeventgenerator.cpp Projet : CM44/Windows-driver-samples

STDMETHODIMP CMediaEventGenerator::GetEvent(
    _In_ DWORD dwFlags,
    _Outptr_result_maybenull_ IMFMediaEvent** ppEvent
    )
{
    //
    // Because GetEvent can block indefinitely, it requires
    // a slightly different locking strategy.
    //
    HRESULT hr = S_OK;
    //MFWMITRACE(DH_THIS_FILE, TP_NORMAL, __FUNCTION__ " : MultiPinMFT GetEvent called");
    IMFMediaEventQueue *pQueue = NULL;

    m_critSec.Lock();

    hr = CheckShutdown();
    //
    // Store the pointer in a local variable, so that another thread
    // does not release it after we leave the critical section.
    //
    if (SUCCEEDED(hr))
    {
        pQueue = m_pQueue;
    }
    
    m_critSec.Unlock();
    
    if (SUCCEEDED(hr))
    {
        hr = pQueue->GetEvent(dwFlags, ppEvent);
    }
        
    return hr;
}

Exemple #5

Fichier : PpboxStream.cpp Projet : huangyt/MyProjects

HRESULT PpboxStream::GetEvent(DWORD dwFlags, IMFMediaEvent** ppEvent)
{
    HRESULT hr = S_OK;

    IMFMediaEventQueue *pQueue = NULL;

    { // scope for lock

        SourceLock lock(m_pSource);

        // Check shutdown
        hr = CheckShutdown();

        // Cache a local pointer to the queue.
        if (SUCCEEDED(hr))
        {
            pQueue = m_pEventQueue;
            pQueue->AddRef();
        }
    }   // release lock

    // Use the local pointer to call GetEvent.
    if (SUCCEEDED(hr))
    {
        hr = pQueue->GetEvent(dwFlags, ppEvent);
    }

    SafeRelease(&pQueue);
    return hr;
}