public HResult GetEvent(MFEventFlag dwFlags, out IMFMediaEvent ppEvent)
{
// NOTE:
// GetEvent can block indefinitely, so we don't hold the lock.
// This requires some juggling with the event queue pointer.
HResult hr = HResult.S_OK;
IMFMediaEventQueue spQueue = null;
ppEvent = null;
lock (_spSource)
{
// Check shutdown
hr = CheckShutdown();
// Get the pointer to the event queue.
if (MFError.Succeeded(hr))
{
spQueue = _spEventQueue;
}
}
// Now get the event.
if (MFError.Succeeded(hr))
{
hr = spQueue.GetEvent(dwFlags, out ppEvent);
}
return(hr);
}
public static extern void MFCreateEventQueue(
out IMFMediaEventQueue ppMediaEventQueue
);
public void Dispose()
{
if (m_pRiff != null)
{
m_pRiff.Dispose();
m_pRiff = null;
}
if (m_pStream != null)
{
m_pStream.Dispose();
m_pStream = null;
}
if (m_pEventQueue != null)
{
Marshal.ReleaseComObject(m_pEventQueue);
m_pEventQueue = null;
}
if (m_pPresentationDescriptor != null)
{
Marshal.ReleaseComObject(m_pPresentationDescriptor);
m_pPresentationDescriptor = null;
}
if (m_Log != null)
{
m_Log.Dispose();
m_Log = null;
}
GC.SuppressFinalize(this);
}