HRESULT CMFCamCapture::stop()
{
HRESULT hr = S_OK;
IMFMediaEvent *pEvent = NULL;
m_spSession->Stop();
// wait for session to finish.
while (1) {
HRESULT hrStatus = S_OK;
MediaEventType met;
CHECK_HR(hr = m_spSession->GetEvent(0, &pEvent));
CHECK_HR(hr = pEvent->GetStatus(&hrStatus));
CHECK_HR(hr = pEvent->GetType(&met));
if (FAILED(hrStatus)) {
DBGMSG(L"Session error: 0x%x (event id: %d)\n", hrStatus, met);
hr = hrStatus;
goto done;
}
if (met == MESessionEnded || met == MESessionStopped) {
break;
}
SafeRelease(&pEvent);
}
done:
return hr;
}
HRESULT CPlayer::Invoke(IMFAsyncResult *pResult)
{
HRESULT hr = S_OK;
MediaEventType meType = MEUnknown; // Event type
IMFMediaEvent *pEvent = NULL;
// Get the event from the event queue.
CHECK_HR(hr = m_pSession->EndGetEvent(pResult, &pEvent));
// Get the event type.
CHECK_HR(hr = pEvent->GetType(&meType));
// If the session is closed, the application is waiting on the
// m_hCloseEvent event handle. Also, do not get any more
// events from the session.
if (meType == MESessionClosed)
{
SetEvent(m_hCloseEvent);
}
else
{
// For all other events, ask the media session for the
// next event in the queue.
CHECK_HR(hr = m_pSession->BeginGetEvent(this, NULL));
}
// For most events, we post the event as a private window message to the
// application. This lets the application process the event on it's
// main thread.
// However, if call to IMFMediaSession::Close is pending, it means the
// application is waiting on the m_hCloseEvent event handle. (Blocking
// call.) In that case, we simply discard the event.
// NOTE: When IMFMediaSession::Close is called, MESessionClosed is NOT
// necessarily the next event that we will receive. We may receive
// any number of other events before receiving MESessionClosed.
if (m_state != Closing)
{
// Leave a reference count on the event.
pEvent->AddRef();
PostMessage(m_hwndEvent, WM_APP_PLAYER_EVENT, (WPARAM)pEvent, (LPARAM)0);
}
done:
SAFE_RELEASE(pEvent);
return S_OK;
}
HRESULT CPlayer::HandleEvent(UINT_PTR pEventPtr)
{
HRESULT hrStatus = S_OK;
HRESULT hr = S_OK;
MediaEventType meType = MEUnknown;
IMFMediaEvent *pEvent = (IMFMediaEvent*)pEventPtr;
if (pEvent == NULL)
{
return E_POINTER;
}
// Get the event type.
hr = pEvent->GetType(&meType);
CHECK_HR( hr );
// Get the event status. If the operation that triggered the event
// did not succeed, the status is a failure code.
hr = pEvent->GetStatus(&hrStatus);
// Check if the async operation succeeded.
if (SUCCEEDED(hr) && FAILED(hrStatus))
{
hr = hrStatus;
}
CHECK_HR( hr );
switch(meType)
{
case MESessionTopologyStatus:
hr = OnTopologyStatus(pEvent);
break;
case MEEndOfPresentation:
hr = OnPresentationEnded(pEvent);
CI_LOG_V("Presentation Ended");
break;
case MENewPresentation:
hr = OnNewPresentation(pEvent);
CI_LOG_V( "New Presentation" );
break;
case MESessionTopologySet:
IMFTopology * topology;
GetEventObject<IMFTopology> (pEvent,&topology);
WORD nodeCount;
topology->GetNodeCount(&nodeCount);
CI_LOG_V( "Topo set and we have " << nodeCount << " nodes" );
//cout << "Topo set and we have " << nodeCount << " nodes" << endl;
SafeRelease(&topology);
break;
case MESessionStarted:
CI_LOG_V( "Started Session" );
break;
case MEBufferingStarted:
CI_LOG_I( "Buffering..." );
break;
case MEBufferingStopped:
CI_LOG_I( "Finished Buffering..." );
break;
default:
hr = OnSessionEvent(pEvent, meType);
break;
}
done:
SafeRelease(&pEvent);
return hr;
}
// Callback for the asynchronous BeginGetEvent method.
HRESULT CPlayer::Invoke(IMFAsyncResult *pResult)
{
MediaEventType meType = MEUnknown; // Event type
IMFMediaEvent *pEvent = NULL;
HRESULT hr;
if ( !m_pSession ) {
CI_LOG_W("Called with a null session");
return -1; //Sometimes Invoke is called but m_pSession is closed
}
// Handle async-loading
if ( m_state == OpenAsyncPending ) {
if ( !&m_pSourceResolver ) {
CI_LOG_E("Async request returned with NULL session");
//ofLogError( "CPlayer::Invoke" ) << "Async request returned with NULL session";
return -1;
}
MF_OBJECT_TYPE ObjectType = MF_OBJECT_INVALID;
IUnknown *pSourceUnk = NULL;
//CheckPointer(m_pSource, E_POINTER);
hr = m_pSourceResolver->EndCreateObjectFromURL(
pResult, // Invoke result
&ObjectType, // Receives the created object type.
&pSourceUnk // Receives a pointer to the media source.
);
// Get the IMFMediaSource interface from the media source.
if ( SUCCEEDED( hr ) )
{
hr = pSourceUnk->QueryInterface( __uuidof( IMFMediaSource ), (void**) ( &m_pSource ) );
m_state = OpenAsyncComplete; // Session finished opening URL
}
SafeRelease( &pSourceUnk );
return hr;
}
// Get the event from the event queue.
hr = m_pSession->EndGetEvent(pResult, &pEvent);
CHECK_HR( hr );
// Get the event type.
hr = pEvent->GetType(&meType);
CHECK_HR( hr );
if (meType == MESessionClosed)
{
// The session was closed.
// The application is waiting on the m_hCloseEvent event handle.
SetEvent(m_hCloseEvent);
}
else
{
// For all other events, get the next event in the queue.
hr = m_pSession->BeginGetEvent(this, NULL);
CHECK_HR( hr );
}
// Check the application state.
// If a call to IMFMediaSession::Close is pending, it means the
// application is waiting on the m_hCloseEvent event and
// the application's message loop is blocked.
// Otherwise, post a private window message to the application.
if (m_state != Closing)
{
// Leave a reference count on the event.
pEvent->AddRef();
PostMessage(m_hwndEvent, WM_APP_PLAYER_EVENT,
(WPARAM)pEvent, (LPARAM)meType);
}
done:
SafeRelease(&pEvent);
return S_OK;
}
HRESULT CPlayer::HandleEvent(UINT_PTR pUnkPtr)
{
HRESULT hr = S_OK;
HRESULT hrStatus = S_OK; // Event status
MediaEventType meType = MEUnknown; // Event type
MF_TOPOSTATUS TopoStatus = MF_TOPOSTATUS_INVALID; // Used with MESessionTopologyStatus event.
IUnknown *pUnk = NULL;
IMFMediaEvent *pEvent = NULL;
// pUnkPtr is really an IUnknown pointer.
pUnk = (IUnknown*)pUnkPtr;
if (pUnk == NULL)
{
return E_POINTER;
}
CHECK_HR(hr = pUnk->QueryInterface(__uuidof(IMFMediaEvent), (void**)&pEvent));
// Get the event type.
CHECK_HR(hr = pEvent->GetType(&meType));
// Get the event status. If the operation that triggered the event did
// not succeed, the status is a failure code.
CHECK_HR(hr = pEvent->GetStatus(&hrStatus));
TRACE((L"Media event: %s\n", EventName(meType)));
// Check if the async operation succeeded.
if (SUCCEEDED(hrStatus))
{
// Switch on the event type. Update the internal state of the CPlayer as needed.
switch(meType)
{
case MESessionTopologyStatus:
// Get the status code.
CHECK_HR(hr = pEvent->GetUINT32(MF_EVENT_TOPOLOGY_STATUS, (UINT32*)&TopoStatus));
switch (TopoStatus)
{
case MF_TOPOSTATUS_READY:
hr = OnTopologyReady(pEvent);
break;
default:
// Nothing to do.
break;
}
break;
case MEEndOfPresentation:
CHECK_HR(hr = OnPresentationEnded(pEvent));
break;
}
}
else
{
hr = hrStatus;
}
done:
SAFE_RELEASE(pUnk);
SAFE_RELEASE(pEvent);
return hr;
}
HRESULT CTranscoder::Transcode()
{
assert (m_pSession);
IMFMediaEvent* pEvent = NULL;
MediaEventType meType = MEUnknown; // Event type
HRESULT hr = S_OK;
HRESULT hrStatus = S_OK; // Event status
//Get media session events synchronously
while (meType != MESessionClosed)
{
hr = m_pSession->GetEvent(0, &pEvent);
if (FAILED(hr)) { break; }
// Get the event type.
hr = pEvent->GetType(&meType);
if (FAILED(hr)) { break; }
hr = pEvent->GetStatus(&hrStatus);
if (FAILED(hr)) { break; }
if (FAILED(hrStatus))
{
wprintf_s(L"Failed. 0x%X error condition triggered this event.\n", hrStatus);
hr = hrStatus;
break;
}
switch (meType)
{
case MESessionTopologySet:
hr = Start();
if (SUCCEEDED(hr))
{
wprintf_s(L"Ready to start.\n");
}
break;
case MESessionStarted:
wprintf_s(L"Started encoding...\n");
break;
case MESessionEnded:
hr = m_pSession->Close();
if (SUCCEEDED(hr))
{
wprintf_s(L"Finished encoding.\n");
}
break;
case MESessionClosed:
wprintf_s(L"Output file created.\n");
break;
}
if (FAILED(hr))
{
break;
}
SafeRelease(&pEvent);
}
SafeRelease(&pEvent);
return hr;
}
/** Asyncronous callback */
HRESULT FImfVideoPlayer::Invoke( IMFAsyncResult* AsyncResult )
{
IMFMediaEvent* Event = NULL;
HRESULT HResult = MediaSession->EndGetEvent( AsyncResult, &Event );
if( FAILED( HResult ) )
{
Event->Release( );
return S_OK;
}
MediaEventType EventType = MEUnknown;
HResult = Event->GetType( &EventType );
//Moving lower because it is referenced below to GetStatus if there was a problem: Event->Release( );
if( FAILED( HResult ) )
{
Event->Release( );
return S_OK;
}
/* Closed */
if( EventType == MESessionClosed )
{
MovieIsFinished.Set( 1 );
CloseIsPosted.Set( 1 );
}
else
{
HResult = MediaSession->BeginGetEvent( this, NULL );
if( FAILED( HResult ) )
{
Event->Release( );
return S_OK;
}
if( MovieIsRunning( ) )
{
/* End of clip */
if( EventType == MEEndOfPresentation )
{
if( Looping )
StartPlayback( );
else
MovieIsFinished.Set( 1 );
}
/* Unknown error, dont continue */
else if( EventType == MEError )
{
HRESULT HReturnCode = S_OK;
Event->GetStatus( &HReturnCode );
/* Log error HResult */
UE_LOG( LogImfVideoPlayer, Log, TEXT( "ImfVideoPlayer error recieved: %i" ), HReturnCode );
MovieIsFinished.Set( 1 );
CloseIsPosted.Set( 1 );
}
}
/* DEBUG: Displays all event ID's in log */
//UE_LOG( LogImfVideoPlayer, Log, TEXT( "ImfVideoPlayer event id: %i" ), EventType );
}
Event->Release( );
return S_OK;
}
