void playNormalVideo()
{
IGraphBuilder *pGraphBuilder;
IMediaControl *pMediaControl;
IMediaEvent *pMediaEvent;
long eventCode;
CoInitialize(NULL);
CoCreateInstance(CLSID_FilterGraph,
NULL,
CLSCTX_INPROC,
IID_IGraphBuilder,
(LPVOID *)&pGraphBuilder);
pGraphBuilder->QueryInterface(IID_IMediaControl,
(LPVOID *)&pMediaControl);
pGraphBuilder->QueryInterface(IID_IMediaEvent,
(LPVOID *)&pMediaEvent);
pMediaControl->RenderFile(L"Rscreen_shortFinger.avi");
pMediaControl->Run();
FILTER_STATE fs;
HRESULT hr = pMediaControl->GetState(100, (OAFilterState*)&fs);
// The first argument is timeout value.
// If you change the "-1" part into "2",
// WaitForCompletion will timeout after 2 seconds.
pMediaEvent->WaitForCompletion(-1, &eventCode);
switch (eventCode) {
case 0:
printf("timeout\n");
break;
case EC_COMPLETE:
printf("complete\n");
break;
case EC_ERRORABORT:
printf("errorabort\n");
break;
case EC_USERABORT:
printf("userabort\n");
break;
}
hr = pMediaControl->GetState(100, (OAFilterState*)&fs);
pMediaControl->Run();
hr = pMediaControl->GetState(100, (OAFilterState*)&fs);
pMediaEvent->WaitForCompletion(-1, &eventCode);
pMediaControl->Release();
pGraphBuilder->Release();
CoUninitialize();
}
//
// Toggle the pause state for the media player. Returns true if the media player pauses, false if it runs.
//
bool CMediaPlayer::TogglePauseState()
{
bool isPaused = false;
IMediaControl *mediaControl;
HRESULT hr = _GraphBuilder->QueryInterface(IID_PPV_ARGS(&mediaControl));
if (SUCCEEDED(hr))
{
OAFilterState filterState;
hr = mediaControl->GetState(INFINITE, &filterState);
if (SUCCEEDED(hr))
{
if (filterState == State_Running)
{
mediaControl->Pause();
isPaused = true;
}
else if (filterState == State_Paused)
{
mediaControl->Run();
isPaused = false;
}
}
mediaControl->Release();
}
return isPaused;
}
void PlaybackControls::PlayPause()
{
IMediaControl *pControl = NULL;
FILTER_STATE fs;
HRESULT hr;
if (mpGraph)
{
hr = mpGraph->QueryInterface(IID_IMediaControl, (void **)&pControl);
pControl->GetState(50, (OAFilterState*)&fs);
if (fs == State_Running)
pControl->Pause();
else
pControl->Run();
pControl->Release();
}
}
bool DirectShowVideoWrapper::isPaused(void) const
{
if(isInitialized())
{
HRESULT hr;
IMediaControl* mediaControl;
hr = _pGraphBuilder->QueryInterface(IID_IMediaControl,(void**)&mediaControl);
OAFilterState GraphState;
if (SUCCEEDED(mediaControl->GetState(0.1f, &GraphState)))
{
return GraphState == State_Paused;
}
else
{
return false;
}
}
return false;
}