void CPPageExternalFilters::OnDoubleClickFilter()
{
if (FilterOverride* f = GetCurFilter()) {
CComPtr<IBaseFilter> pBF;
CString name;
if (f->type == FilterOverride::REGISTERED) {
CStringW namew;
if (CreateFilter(f->dispname, &pBF, namew)) {
name = namew;
}
} else if (f->type == FilterOverride::EXTERNAL) {
if (SUCCEEDED(LoadExternalFilter(f->path, f->clsid, &pBF))) {
name = f->name;
}
}
if (CComQIPtr<ISpecifyPropertyPages> pSPP = pBF) {
CComPropertySheet ps(name, this);
if (ps.AddPages(pSPP) > 0) {
CComPtr<IFilterGraph> pFG;
if (SUCCEEDED(pFG.CoCreateInstance(CLSID_FilterGraph))) {
pFG->AddFilter(pBF, L"");
}
ps.DoModal();
}
}
}
}
HRESULT
CGraphManager::CreateCaptureGraphInternal()
{
HRESULT hr = S_OK;
CComVariant varCamName;
CPropertyBag PropBag;
OAEVENT oaEvent;
WCHAR wzDeviceName[ MAX_PATH + 1 ];
CComPtr<IMediaEvent> pMediaEvent;
CComPtr<IGraphBuilder> pFilterGraph;
CComPtr<IPersistPropertyBag> pPropertyBag;
CComPtr<IDMOWrapperFilter> pWrapperFilter;
CComPtr<IBaseFilter> pImageSinkFilter;
//
// Create the capture graph builder and register the filtergraph manager.
//
CHK( m_pCaptureGraphBuilder.CoCreateInstance( CLSID_CaptureGraphBuilder ));
CHK( pFilterGraph.CoCreateInstance( CLSID_FilterGraph ));
CHK( m_pCaptureGraphBuilder->SetFiltergraph( pFilterGraph ));
//
// Create and initialize the video capture filter
//
CHK( m_pVideoCaptureFilter.CoCreateInstance( CLSID_VideoCapture ));
CHK( m_pVideoCaptureFilter.QueryInterface( &pPropertyBag ));
// We are loading the driver CAM1 in the video capture filter.
CHK( GetFirstCameraDriver( wzDeviceName ));
varCamName = wzDeviceName;
if( varCamName.vt != VT_BSTR )
{
ERR( E_OUTOFMEMORY );
}
CHK( PropBag.Write( L"VCapName", &varCamName ));
CHK( pPropertyBag->Load( &PropBag, NULL ));
// Everything succeeded, the video capture filter is added to the filtergraph
CHK( pFilterGraph->AddFilter( m_pVideoCaptureFilter, L"Video Capture Filter Source" ));
//
// Create the still image filter, and connect it to the video capture filter
//
CHK( pImageSinkFilter.CoCreateInstance( CLSID_IMGSinkFilter ));
CHK( pFilterGraph->AddFilter( pImageSinkFilter, L"Still image filter" ));
CHK( m_pCaptureGraphBuilder->RenderStream( &PIN_CATEGORY_STILL, &MEDIATYPE_Video, m_pVideoCaptureFilter, NULL, pImageSinkFilter ));
CHK( pImageSinkFilter.QueryInterface( &m_pImageSinkFilter ));
//
// Prevent the data from flowing into the capture stream
//
// CHK( m_pCaptureGraphBuilder->ControlStream( &PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video, m_pVideoCaptureFilter, 0, 0 ,0,0 ));
//
// Let's get the handle for DShow events. The main loop will listen to both notifications from
// the UI thread and for DShow notifications
//
CHK( pFilterGraph->QueryInterface( IID_IMediaEvent, (void**) &pMediaEvent ));
CHK( pMediaEvent->GetEventHandle( &oaEvent ));
m_handle[1] = (HANDLE) oaEvent;
m_fGraphBuilt = TRUE;
NotifyMessage( MESSAGE_INFO, L"Builing the graph completed" );
Cleanup:
if( FAILED( hr ))
{
NotifyMessage( MESSAGE_ERROR, L"Builing the graph failed" );
}
return hr;
}
bool DShowAudioSource::load(const RString& path)
{
mPath = path;
HRESULT hr = S_OK;
// Create the graph builder
CComPtr<IGraphBuilder> pGraphBuilder;
hr = pGraphBuilder.CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER);
if(FAILED(hr))
return false;
// Create the sample grabber filter
CComPtr<IBaseFilter> pSampleGrabberBaseFilter;
hr = pSampleGrabberBaseFilter.CoCreateInstance(CLSID_SampleGrabber, NULL, CLSCTX_INPROC_SERVER);
if(FAILED(hr))
return false;
// Add the sample grabber filter to the graph
hr = pGraphBuilder->AddFilter(pSampleGrabberBaseFilter, L"Sample Grabber");
if(FAILED(hr))
return false;
// Get the Sample Grabber interface
CComQIPtr<ISampleGrabber> pSampleGrabberFilter(pSampleGrabberBaseFilter);
if(pSampleGrabberFilter == 0)
return false;
// Set the sample grabber's media type
AM_MEDIA_TYPE mt;
ZeroMemory(&mt, sizeof(AM_MEDIA_TYPE));
mt.majortype = MEDIATYPE_Audio;
mt.subtype = MEDIASUBTYPE_PCM;
mt.formattype = FORMAT_WaveFormatEx;
hr = pSampleGrabberFilter->SetMediaType(&mt);
if(FAILED(hr))
return false;
// Create the sample grabber callback
mpSampleGrabberCallback.Attach(new SampleGrabberCallback(this));
hr = pSampleGrabberFilter->SetCallback(mpSampleGrabberCallback, 1);
if(FAILED(hr))
return false;
// Add the source filter to the graph
WCHAR filename[MAX_PATH];
MultiByteToWideChar(CP_ACP, 0,mPath.c_str(), -1, filename, MAX_PATH);
CComPtr<IBaseFilter> pSourceFilter;
hr = pGraphBuilder->AddSourceFilter(filename, L"Audio Source", &pSourceFilter);
if(FAILED(hr))
return false;
// Create the NULL renderer. We are only decoding
CComPtr<IBaseFilter> pNullRenderer;
hr = pNullRenderer.CoCreateInstance(CLSID_NullRenderer, NULL, CLSCTX_INPROC_SERVER);
hr = pGraphBuilder->AddFilter(pNullRenderer, L"NULL Renderer");
// Connect input to sample grabber
hr = ConnectFilters(pGraphBuilder, pSourceFilter, pSampleGrabberBaseFilter);
if(FAILED(hr))
return false;
// Connect sample grabber to NULL renderer
hr = ConnectFilters(pGraphBuilder, pSampleGrabberBaseFilter, pNullRenderer);
if(FAILED(hr))
return false;
// Get some useful interfaces
mpMediaControl = pGraphBuilder;
if(mpMediaControl == 0)
return false;
mpMediaEvent = pGraphBuilder;
if(mpMediaEvent == 0)
return false;
mpMediaSeeking = pGraphBuilder;
if(mpMediaSeeking == 0)
return false;
// Get the waveformatex structure
pSampleGrabberFilter->GetConnectedMediaType(&mt);
mpWaveFormatEx = reinterpret_cast<WAVEFORMATEX*>(mt.pbFormat);
hr = mpMediaSeeking->SetTimeFormat(&TIME_FORMAT_MEDIA_TIME);
if(FAILED(hr))
return false;
CComQIPtr<IMediaFilter> pMediaFilter(pGraphBuilder);
pMediaFilter->SetSyncSource(0);
mCurrentPosition = 0;
mEOF = false;
printf("# channels = %d\n", mpWaveFormatEx->nChannels);
printf("Sample rate = %d\n", mpWaveFormatEx->nSamplesPerSec);
return true;
}
