static int v4w_open_videodevice(V4wState *s, int format, MSVideoSize *vsize) { // Initialize COM CoInitialize(NULL); // get a Graph HRESULT hr=s->m_pGraph.CoCreateInstance(CLSID_FilterGraph); if(FAILED(hr)) { return -1; } // get a CaptureGraphBuilder2 #if !defined(_WIN32_WCE) hr=s->m_pBuilder.CoCreateInstance(CLSID_CaptureGraphBuilder2); #else hr=s->m_pBuilder.CoCreateInstance(CLSID_CaptureGraphBuilder); #endif if(FAILED(hr)) { return -2; } // connect capture graph builder with the graph s->m_pBuilder->SetFiltergraph(s->m_pGraph); // get mediacontrol so we can start and stop the filter graph hr=s->m_pGraph.QueryInterface(&(s->m_pControl)); if(FAILED(hr)) { return -3; } // get DXFilter s->m_pDXFilter = new CDXFilter(NULL, &hr, FALSE); if(s->m_pDXFilter==NULL) { return -4; } s->m_pDXFilter->AddRef(); if(FAILED(hr)) { return -4; } CMediaType mt; mt.SetType(&MEDIATYPE_Video); if (format==MS_YUV420P) { GUID m = (GUID)FOURCCMap(MAKEFOURCC('I','4','2','0')); mt.SetSubtype(&m); mt.SetSubtype(&MEDIASUBTYPE_YV12); } else //if (format==MS_RGB24) { mt.SetSubtype(&MEDIASUBTYPE_RGB24); } //mt.SetSubtype(&MEDIASUBTYPE_IYUV); //mt.SetSubtype(&MEDIASUBTYPE_YUYV); //mt.SetSubtype(&MEDIASUBTYPE_RGB24); //mt.SetSampleSize(); mt.formattype = FORMAT_VideoInfo; mt.SetTemporalCompression(FALSE); VIDEOINFO *pvi = (VIDEOINFO *) mt.AllocFormatBuffer(sizeof(VIDEOINFO)); if (NULL == pvi) return E_OUTOFMEMORY; ZeroMemory(pvi, sizeof(VIDEOINFO)); if (format==MS_YUV420P) { pvi->bmiHeader.biCompression = MAKEFOURCC('I','4','2','0'); pvi->bmiHeader.biCompression = MAKEFOURCC('Y','V','1','2'); pvi->bmiHeader.biBitCount = 12; } else { pvi->bmiHeader.biCompression = BI_RGB; pvi->bmiHeader.biBitCount = 24; } pvi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER); pvi->bmiHeader.biWidth = vsize->width; pvi->bmiHeader.biHeight = vsize->height; pvi->bmiHeader.biPlanes = 1; pvi->bmiHeader.biSizeImage = GetBitmapSize(&pvi->bmiHeader); pvi->bmiHeader.biClrImportant = 0; mt.SetSampleSize(pvi->bmiHeader.biSizeImage); mt.SetFormat((BYTE*)pvi, sizeof(VIDEOINFO)); hr = s->m_pDXFilter->SetAcceptedMediaType(&mt); if(FAILED(hr)) { return -5; } hr = s->m_pDXFilter->SetCallback(Callback); if(FAILED(hr)) { return -6; } hr = s->m_pDXFilter->QueryInterface(IID_IBaseFilter, (LPVOID *)&s->m_pIDXFilter); if(FAILED(hr)) { return -7; } hr = s->m_pGraph->AddFilter(s->m_pIDXFilter, L"DXFilter Filter"); if(FAILED(hr)) { return -8; } #ifdef WM6 ICreateDevEnum *pCreateDevEnum = NULL; IEnumMoniker *pEnumMoniker = NULL; IMoniker *pMoniker = NULL; ULONG nFetched = 0; hr = CoCreateInstance(CLSID_SystemDeviceEnum, NULL, CLSCTX_INPROC_SERVER, IID_ICreateDevEnum, (PVOID *)&pCreateDevEnum); if(FAILED(hr)) { return -9; } hr = pCreateDevEnum->CreateClassEnumerator(CLSID_VideoInputDeviceCategory, &pEnumMoniker, 0); if (FAILED(hr) || pEnumMoniker == NULL) { //printf("no device\n"); return -10; } pEnumMoniker->Reset(); hr = pEnumMoniker->Next(1, &pMoniker, &nFetched); if(FAILED(hr) || pMoniker==NULL) { return -11; } hr = pMoniker->BindToObject(0, 0, IID_IBaseFilter, (void**)&s->m_pDeviceFilter ); if(FAILED(hr)) { return -12; } s->m_pGraph->AddFilter(s->m_pDeviceFilter, L"Device Filter"); pMoniker->Release(); pEnumMoniker->Release(); pCreateDevEnum->Release(); #else WCHAR wzDeviceName[ MAX_PATH + 1 ]; CComVariant varCamName; CPropertyBag PropBag; CComPtr<IPersistPropertyBag> pPropertyBag; GetFirstCameraDriver(wzDeviceName); hr = s->m_pDeviceFilter.CoCreateInstance( CLSID_VideoCapture ); if (FAILED(hr)) { return -8; } s->m_pDeviceFilter.QueryInterface( &pPropertyBag ); varCamName = wzDeviceName; if(( varCamName.vt == VT_BSTR ) == NULL ) { return E_OUTOFMEMORY; } PropBag.Write( L"VCapName", &varCamName ); pPropertyBag->Load( &PropBag, NULL ); pPropertyBag.Release(); hr = s->m_pGraph->AddFilter( s->m_pDeviceFilter, L"Video capture source" ); #endif if (FAILED(hr)) { return -8; } // get null renderer s->m_pNullRenderer = NULL; #if 0 hr=s->m_pNullRenderer.CoCreateInstance(CLSID_NullRenderer); if(FAILED(hr)) { return -13; } #endif if (s->m_pNullRenderer!=NULL) { s->m_pGraph->AddFilter(s->m_pNullRenderer, L"Null Renderer"); } hr = s->m_pBuilder->RenderStream(&PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video, s->m_pDeviceFilter, s->m_pIDXFilter, s->m_pNullRenderer); if (FAILED(hr)) { //hr = s->m_pBuilder->RenderStream(&PIN_CATEGORY_CAPTURE, // &MEDIATYPE_Video, s->m_pDeviceFilter, s->m_pIDXFilter, s->m_pNullRenderer); if (FAILED(hr)) { return -14; } } //m_pDXFilter->SetBufferSamples(TRUE); // Create the System Device Enumerator. IFilterMapper *pMapper = NULL; //IEnumMoniker *pEnum = NULL; IEnumRegFilters *pEnum = NULL; hr = CoCreateInstance(CLSID_FilterMapper, NULL, CLSCTX_INPROC, IID_IFilterMapper, (void **) &pMapper); if (FAILED(hr)) { // Error handling omitted for clarity. } GUID arrayInTypes[2]; arrayInTypes[0] = MEDIATYPE_Video; arrayInTypes[1] = MEDIASUBTYPE_dvsd; hr = pMapper->EnumMatchingFilters( &pEnum, MERIT_HW_COMPRESSOR, // Minimum merit. FALSE, // At least one input pin? MEDIATYPE_NULL, MEDIASUBTYPE_NULL, FALSE, // Must be a renderer? FALSE, // At least one output pin? MEDIATYPE_NULL, MEDIASUBTYPE_NULL); // Enumerate the monikers. //IMoniker *pMoniker; REGFILTER *pMoniker; ULONG cFetched; while (pEnum->Next(1, &pMoniker, &cFetched) == S_OK) { IPropertyBag *pPropBag = NULL; #if 0 hr = pMoniker->BindToStorage(0, 0, IID_IPropertyBag, (void **)&pPropBag); if (SUCCEEDED(hr)) { // To retrieve the friendly name of the filter, do the following: VARIANT varName; VariantInit(&varName); hr = pPropBag->Read(L"FriendlyName", &varName, 0); if (SUCCEEDED(hr)) { // Display the name in your UI somehow. } VariantClear(&varName); // To create an instance of the filter, do the following: IBaseFilter *pFilter; hr = pMoniker->BindToObject(NULL, NULL, IID_IBaseFilter, (void**)&pFilter); // Now add the filter to the graph. Remember to release pFilter later. // Clean up. pPropBag->Release(); } pMoniker->Release(); #endif } // Clean up. pMapper->Release(); pEnum->Release(); s_callback = s; hr = s->m_pControl->Run(); if(FAILED(hr)) { return -15; } s->rotregvalue=1; s->pix_fmt = format; s->vsize.height = vsize->height; s->vsize.width = vsize->width; return 0; }
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; }