int IMFVideoPresenter.ProcessMessage(MFVPMessageType eMessage, IntPtr ulParam)
{
// Make sure we *never* leave this entry point with an exception
try
{
lock (this)
{
//Debug.WriteLine(eMessage);
CheckShutdown();
switch (eMessage)
{
// Flush all pending samples.
case MFVPMessageType.Flush:
Flush();
break;
// Renegotiate the media type with the mixer.
case MFVPMessageType.InvalidateMediaType:
RenegotiateMediaType();
break;
// The mixer received a new input sample.
case MFVPMessageType.ProcessInputNotify:
ProcessInputNotify();
break;
// Streaming is about to start.
case MFVPMessageType.BeginStreaming:
BeginStreaming();
break;
// Streaming has ended. (The EVR has stopped.)
case MFVPMessageType.EndStreaming:
EndStreaming();
break;
// All input streams have ended.
case MFVPMessageType.EndOfStream:
// Set the EOS flag.
m_bEndStreaming = true;
// Check if it's time to send the EC_COMPLETE event to the EVR.
CheckEndOfStream();
break;
// Frame-stepping is starting.
case MFVPMessageType.Step:
PrepareFrameStep(ulParam.ToInt32());
break;
// Cancels frame-stepping.
case MFVPMessageType.CancelStep:
CancelFrameStep();
break;
default:
throw new COMException("ProcessMessage", E_InvalidArgument); // Unknown message. (This case should never occur.)
}
}
return S_Ok;
}
catch (Exception e)
{
return Marshal.GetHRForException(e);
}
}
public int ProcessMessage(MFVPMessageType eMessage, IntPtr ulParam)
{
Wrapper.CCallbackHandler _handler =
new Wrapper.ProcessMessageHandler(m_Caller, eMessage, ulParam);
_handler.Invoke();
return _handler.m_Result;
}
public int ProcessMessageImpl(MFVPMessageType eMessage, IntPtr ulParam)
{
try
{
HRESULT hr = S_OK;
lock (m_ObjectLock)
{
hr = CheckShutdown();
if (hr.Failed) return hr;
switch (eMessage)
{
// Flush all pending samples.
case MFVPMessageType.Flush:
hr = Flush();
break;
// Renegotiate the media type with the mixer.
case MFVPMessageType.InvalidateMediaType:
hr = RenegotiateMediaType();
break;
// The mixer received a new input sample.
case MFVPMessageType.ProcessInputNotify:
hr = ProcessInputNotify();
break;
// Streaming is about to start.
case MFVPMessageType.BeginStreaming:
hr = BeginStreaming();
break;
// Streaming has ended. (The EVR has stopped.)
case MFVPMessageType.EndStreaming:
hr = EndStreaming();
break;
// All input streams have ended.
case MFVPMessageType.EndOfStream:
// Set the EOS flag.
m_bEndStreaming = TRUE;
// Check if it's time to send the EC_COMPLETE event to the EVR.
hr = CheckEndOfStream();
break;
// Frame-stepping is starting.
case MFVPMessageType.Step:
hr = E_NOTIMPL;
break;
// Cancels frame-stepping.
case MFVPMessageType.CancelStep:
hr = E_NOTIMPL;
break;
default:
hr = E_INVALIDARG; // Unknown message. (This case should never occur.)
break;
}
}
return hr;
}
catch (Exception _exception)
{
throw _exception;
}
}
public ProcessMessageHandler(Wrapper _Invoker, MFVPMessageType _eMessage, IntPtr _ulParam)
: base(_Invoker)
{
eMessage = _eMessage;
ulParam = _ulParam;
m_Type = CallType.ProcessMessage;
}
