/* 构建滤波器链表，添加各个滤波器，链接并运行链表*/
HRESULT CVMR_Capture::Init(int iDeviceID,HWND hWnd, int iWidth, int iHeight)
{
HRESULT hr;
//再次调用函数，释放已经建立的链表
CloseInterfaces();
// 创建IGraphBuilder
hr = CoCreateInstance(CLSID_FilterGraph, NULL,
CLSCTX_INPROC_SERVER,
IID_IGraphBuilder, (void **)&m_pGB);
if (SUCCEEDED(hr))
{
// 创建VMR并添加到Graph中
InitializeWindowlessVMR(hWnd);
// 把指定的设备捆绑到一个滤波器
if(!BindFilter(iDeviceID, &m_pDF))
return S_FALSE;
// 添加采集设备滤波器到Graph中
hr = m_pGB->AddFilter(m_pDF, L"Video Capture");
if (FAILED(hr)) return hr;
// 获取捕获滤波器的引脚
IEnumPins *pEnum;
m_pDF->EnumPins(&pEnum);
hr |= pEnum->Reset();
hr |= pEnum->Next(1, &m_pCamOutPin, NULL);
// 获取媒体控制和事件接口
hr |= m_pGB->QueryInterface(IID_IMediaControl, (void **)&m_pMC);
hr |= m_pGB->QueryInterface(IID_IMediaEventEx, (void **)&m_pME);
// 设置窗口通知消息处理
//hr = pME->SetNotifyWindow((OAHWND)hWnd, WM_GRAPHNOTIFY, 0);
// 匹配视频分辨率，对视频显示窗口设置
hr |= InitVideoWindow(hWnd,iWidth, iHeight);
// 为捕获图像帧申请内存
m_nFramelen=iWidth*iHeight*3;
m_pFrame=(BYTE*) new BYTE[m_nFramelen];
// 运行Graph,捕获视频
m_psCurrent = STOPPED;
hr |= m_pGB->Render(m_pCamOutPin);
hr |= m_pMC->Run();
if (FAILED(hr)) return hr;
m_psCurrent = RUNNING;
}
return hr;
}
HRESULT CVMR_Capture::Init(int iDeviceID,HWND hWnd, int iWidth, int iHeight)
{
HRESULT hr;
// Get the interface for DirectShow's GraphBuilder
hr=CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
IID_IGraphBuilder, (void **)&m_pGB);
if(SUCCEEDED(hr))
{
// Create the Video Mixing Renderer and add it to the graph
InitializeWindowlessVMR(hWnd);
// Bind Device Filter. We know the device because the id was passed in
if(!BindFilter(iDeviceID, &m_pDF))
return S_FALSE;
hr=m_pGB->AddFilter(m_pDF, L"Video Capture");
if (FAILED(hr))
return hr;
CComPtr<IEnumPins> pEnum;
m_pDF->EnumPins(&pEnum);
hr = pEnum->Reset();
hr = pEnum->Next(1, &m_pCamOutPin, NULL);
// QueryInterface for DirectShow interfaces
hr = m_pGB->QueryInterface(IID_IMediaControl, (void **)&m_pMC);
hr = m_pGB->QueryInterface(IID_IMediaEventEx, (void **)&m_pME);
// Have the graph signal event via window callbacks for performance
//hr = pME->SetNotifyWindow((OAHWND)hWnd, WM_GRAPHNOTIFY, 0);
hr = InitVideoWindow(hWnd,iWidth, iHeight);
m_nFramelen=iWidth*iHeight*3;
m_pFrame=(BYTE*) new BYTE[m_nFramelen];
// Run the graph to play the media file
m_psCurrent=Stopped;
hr = m_pGB->Render(m_pCamOutPin);
hr = m_pMC->Run();
m_psCurrent=Running;
}
return hr;
}
HRESULT ConfigureMultiFileVMR9(WCHAR *wFile1, WCHAR *wFile2)
{
HRESULT hr=S_OK;
CComPtr <IBaseFilter> pVmr;
// Create the Video Mixing Renderer and add it to the graph
JIF(InitializeWindowlessVMR(&pVmr));
// Render the files programmatically to use the VMR9 as renderer
if (SUCCEEDED(hr = RenderFileToVMR9(pGB, wFile1, pVmr)))
hr = RenderFileToVMR9(pGB, wFile2, pVmr);
return hr;
}
HRESULT PlayMovieInWindow(LPTSTR szFile)
{
USES_CONVERSION;
WCHAR wFile[MAX_PATH];
HRESULT hr;
// Check input string
if (szFile == NULL)
return E_POINTER;
// Clear open dialog remnants before calling RenderFile()
UpdateWindow(ghApp);
// Convert filename to wide character string
wcsncpy(wFile, T2W(szFile), NUMELMS(wFile)-1);
wFile[MAX_PATH-1] = 0;
// Get the interface for DirectShow's GraphBuilder
JIF(CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
IID_IGraphBuilder, (void **)&pGB));
if(SUCCEEDED(hr))
{
// Create the Video Mixing Renderer and add it to the graph
JIF(InitializeWindowlessVMR());
// Have the graph builder construct its the appropriate graph automatically
JIF(pGB->RenderFile(wFile, NULL));
// QueryInterface for DirectShow interfaces
JIF(pGB->QueryInterface(IID_IMediaControl, (void **)&pMC));
JIF(pGB->QueryInterface(IID_IMediaEventEx, (void **)&pME));
JIF(pGB->QueryInterface(IID_IMediaSeeking, (void **)&pMS));
// Is this an audio-only file (no video component)?
if (CheckVideoVisibility())
{
JIF(InitVideoWindow(1, 1));
}
else
{
// This sample requires a video clip to be loaded
Msg(TEXT("This sample requires media with a video component. ")
TEXT("Please select another file."));
return E_FAIL;
}
// Have the graph signal event via window callbacks for performance
JIF(pME->SetNotifyWindow((OAHWND)ghApp, WM_GRAPHNOTIFY, 0));
// Add the bitmap (static image or dynamic text) to the VMR's input
if (g_dwTickerFlags & MARK_STATIC_IMAGE)
{
hr = BlendApplicationImage(ghApp);
if (FAILED(hr))
PostMessage(ghApp, WM_CLOSE, 0, 0);
CheckMenuItem(ghMenu, ID_TICKER_STATIC_IMAGE, MF_CHECKED);
CheckMenuItem(ghMenu, ID_TICKER_DYNAMIC_TEXT, MF_UNCHECKED);
}
else // MARK_DYNAMIC_TEXT
{
if (!g_hFont)
g_hFont = SetTextFont(FALSE); // Don't display the Windows Font Select dialog
// If the initial blend fails, post a close message to exit the app
hr = BlendApplicationText(ghApp, g_szAppText);
if (FAILED(hr))
PostMessage(ghApp, WM_CLOSE, 0, 0);
CheckMenuItem(ghMenu, ID_TICKER_STATIC_IMAGE, MF_UNCHECKED);
CheckMenuItem(ghMenu, ID_TICKER_DYNAMIC_TEXT, MF_CHECKED);
}
// Complete the window setup
ShowWindow(ghApp, SW_SHOWNORMAL);
UpdateWindow(ghApp);
SetForegroundWindow(ghApp);
SetFocus(ghApp);
#ifdef REGISTER_FILTERGRAPH
if (FAILED(AddGraphToRot(pGB, &g_dwGraphRegister)))
{
Msg(TEXT("Failed to register filter graph with ROT!"));
g_dwGraphRegister = 0;
}
#endif
// Run the graph to play the media file
JIF(pMC->Run());
// Start animation by default
PostMessage(ghApp, WM_COMMAND, ID_SLIDE, 0);
}
return hr;
}
HRESULT PlayMovieInWindow(LPTSTR szFile)
{
HRESULT hr;
// Check input string
if (szFile == NULL)
return E_POINTER;
// Clear open dialog remnants before calling RenderFile()
UpdateWindow(ghApp);
// Get the interface for DirectShow's GraphBuilder
JIF(CoCreateInstance(CLSID_FilterGraph, NULL, CLSCTX_INPROC_SERVER,
IID_IGraphBuilder, (void **)&pGB));
if(SUCCEEDED(hr))
{
SmartPtr <IBaseFilter> pVmr;
// Create the Video Mixing Renderer and add it to the graph
JIF(InitializeWindowlessVMR(&pVmr));
// Render the file programmatically to use the VMR9 as renderer.
// Pass TRUE to create an audio renderer also.
if (FAILED(hr = RenderFileToVideoRenderer(pGB, szFile, TRUE)))
return hr;
// QueryInterface for DirectShow interfaces
JIF(pGB->QueryInterface(IID_IMediaControl, (void **)&pMC));
JIF(pGB->QueryInterface(IID_IMediaEventEx, (void **)&pME));
JIF(pGB->QueryInterface(IID_IMediaSeeking, (void **)&pMS));
JIF(pGB->QueryInterface(IID_IBasicAudio, (void **)&pBA));
// Is this an audio-only file (no video component)?
if (CheckVideoVisibility())
{
JIF(InitVideoWindow(1, 1));
}
else
{
// This sample requires a video clip to be loaded
Msg(TEXT("This sample requires media with a video component. ")
TEXT("Please select another file."));
return E_FAIL;
}
// Add the bitmap to the VMR's input
BlendApplicationImage(ghApp);
// Have the graph signal event via window callbacks for performance
JIF(pME->SetNotifyWindow((OAHWND)ghApp, WM_GRAPHNOTIFY, 0));
// Complete the window setup
ShowWindow(ghApp, SW_SHOWNORMAL);
UpdateWindow(ghApp);
SetForegroundWindow(ghApp);
SetFocus(ghApp);
UpdateMainTitle();
#ifdef REGISTER_FILTERGRAPH
hr = AddGraphToRot(pGB, &g_dwGraphRegister);
if (FAILED(hr))
{
Msg(TEXT("Failed to register filter graph with ROT! hr=0x%x"), hr);
g_dwGraphRegister = 0;
}
#endif
// Run the graph to play the media file
JIF(pMC->Run());
g_psCurrent=Running;
}
return hr;
}
