directxShow的視頻採集,9.0版本之後的sdk把directshow從中分離出來了,所以本人下了後面的幾個版本都沒有找到要的SDK,汗啊.......
所以下載9.0b,在微軟的網站上有,後面好像有個(2003)字樣.去下吧.
好了,從裏面提出一個只採集視頻的程序.
1.
// TestVideoDlg.h : 頭文件//#pragma once#include "afxwin.h"// CTestVideoDlg 對話框class CTestVideoDlg : public CDialog
...{
// 構造public: CTestVideoDlg(CWnd* pParent = NULL); // 標準構造函數// 對話框數據
enum ...{ IDD = IDD_TESTVIDEO_DIALOG }; protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持// 實現protected: HICON m_hIcon; // 生成的消息映射函數 virtual BOOL OnInitDialog(); afx_msg void OnSysCommand(UINT nID, LPARAM lParam); afx_msg void OnPaint(); afx_msg HCURSOR OnQueryDragIcon(); DECLARE_MESSAGE_MAP()public: CStatic m_wndVideo;protected: CComPtr< IGraphBuilder > m_pGraph; CComPtr< ISampleGrabber > m_pGrabber; HRESULT InitStillGraph( ); void Error( TCHAR * pText ); void GetDefaultCapDevice( IBaseFilter ** ppCap );
};
2.實現部分
// TestVideoDlg.cpp : 實現文件//#include "stdafx.h"#include "TestVideo.h"#include "TestVideoDlg.h"#include "......commondshowutil.h"#ifdef _DEBUG#define new DEBUG_NEW#endif#ifdef DEBUG#define REGISTER_FILTERGRAPH#endif// 用於應用程序“關於”菜單項的 CAboutDlg 對話框class CAboutDlg : public CDialog...{public: CAboutDlg();// 對話框數據 enum ...{ IDD = IDD_ABOUTBOX }; protected: virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV 支持// 實現protected: DECLARE_MESSAGE_MAP()};CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)...{}void CAboutDlg::DoDataExchange(CDataExchange* pDX)...{ CDialog::DoDataExchange(pDX);}BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)END_MESSAGE_MAP()// CTestVideoDlg 對話框HWND g_hwnd=0;DWORD g_dwGraphRegister=0; // For running object tableCTestVideoDlg::CTestVideoDlg(CWnd* pParent /**//*=NULL*/) : CDialog(CTestVideoDlg::IDD, pParent)...{ m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);}void CTestVideoDlg::DoDataExchange(CDataExchange* pDX)...{ CDialog::DoDataExchange(pDX); DDX_Control(pDX, IDC_STATIC_VIDEO, m_wndVideo);}BEGIN_MESSAGE_MAP(CTestVideoDlg, CDialog) ON_WM_SYSCOMMAND() ON_WM_PAINT() ON_WM_QUERYDRAGICON() //}}AFX_MSG_MAPEND_MESSAGE_MAP()// CTestVideoDlg 消息處理程序BOOL CTestVideoDlg::OnInitDialog()...{ CDialog::OnInitDialog(); // 將“關於...”菜單項添加到系統菜單中。 // IDM_ABOUTBOX 必須在系統命令範圍內。 ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX); ASSERT(IDM_ABOUTBOX < 0xF000); CMenu* pSysMenu = GetSystemMenu(FALSE); if (pSysMenu != NULL) ...{ CString strAboutMenu; strAboutMenu.LoadString(IDS_ABOUTBOX); if (!strAboutMenu.IsEmpty()) ...{ pSysMenu->AppendMenu(MF_SEPARATOR); pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
} } // 設置此對話框的圖標。當應用程序主窗口不是對話框時，框架將自動 // 執行此操作 SetIcon(m_hIcon, TRUE); // 設置大圖標 SetIcon(m_hIcon, FALSE); // 設置小圖標 // TODO: 在此添加額外的初始化代碼 CoInitializeEx(NULL, COINIT_APARTMENTTHREADED); g_hwnd = GetSafeHwnd(); // start up the still image capture graph // HRESULT hr = InitStillGraph( ); m_wndVideo.ModifyStyle(0, WS_CLIPCHILDREN); return TRUE; // 除非設置了控件的焦點，否則返回 TRUE}void CTestVideoDlg::OnSysCommand(UINT nID, LPARAM lParam)...{ if ((nID & 0xFFF0) == IDM_ABOUTBOX) ...{ CAboutDlg dlgAbout; dlgAbout.DoModal(); } else ...{ CDialog::OnSysCommand(nID, lParam); }}// 如果向對話框添加最小化按鈕，則需要下面的代碼// 來繪製該圖標。對於使用文檔/視圖模型的 MFC 應用程序，// 這將由框架自動完成。void CTestVideoDlg::OnPaint() ...{ if (IsIconic()) ...{ CPaintDC dc(this); // 用於繪製的設備上下文 SendMessage(WM_ICONERASEBKGND, reinterpret_cast<WPARAM>(dc.GetSafeHdc()), 0); // 使圖標在工作矩形中居中 int cxIcon = GetSystemMetrics(SM_CXICON); int cyIcon = GetSystemMetrics(SM_CYICON); CRect rect; GetClientRect(&rect); int x = (rect.Width() - cxIcon + 1) / 2; int y = (rect.Height() - cyIcon + 1) / 2; // 繪製圖標 dc.DrawIcon(x, y, m_hIcon); } else ...{ CDialog::OnPaint(); }}//當用戶拖動最小化窗口時系統調用此函數取得光標顯示。HCURSOR CTestVideoDlg::OnQueryDragIcon()...{ return static_cast<HCURSOR>(m_hIcon);}void CTestVideoDlg::Error( TCHAR * pText )...{ ::MessageBox( NULL, pText, TEXT("Error!"), MB_OK | MB_TASKMODAL | MB_SETFOREGROUND );}HRESULT CTestVideoDlg::InitStillGraph( )...{ HRESULT hr; // create a filter graph // hr = m_pGraph.CoCreateInstance( CLSID_FilterGraph ); if( !m_pGraph ) ...{ Error( TEXT("Could not create filter graph") ); return E_FAIL; } // get whatever capture device exists // CComPtr< IBaseFilter > pCap; GetDefaultCapDevice( &pCap ); if( !pCap ) ...{ Error( TEXT("No video capture device was detected on your system. ") TEXT("This sample requires a functional video capture device, such ") TEXT("as a USB web camera. Video capture will be disabled.") ); return E_FAIL; } // add the capture filter to the graph // hr = m_pGraph->AddFilter( pCap, L"Cap" ); if( FAILED( hr ) ) ...{ Error( TEXT("Could not put capture device in graph")); return E_FAIL; } // create a sample grabber // hr = m_pGrabber.CoCreateInstance( CLSID_SampleGrabber ); if( !m_pGrabber ) ...{ Error( TEXT("Could not create SampleGrabber (is qedit.dll registered?)")); return hr; } CComQIPtr< IBaseFilter, &IID_IBaseFilter > pGrabBase( m_pGrabber ); // force it to connect to video, 24 bit // CMediaType VideoType; VideoType.SetType( &MEDIATYPE_Video ); VideoType.SetSubtype( &MEDIASUBTYPE_RGB24 ); hr = m_pGrabber->SetMediaType( &VideoType ); // shouldn't fail if( FAILED( hr ) ) ...{ Error( TEXT("Could not set media type")); return hr; } // add the grabber to the graph // hr = m_pGraph->AddFilter( pGrabBase, L"Grabber" ); if( FAILED( hr ) ) ...{ Error( TEXT("Could not put sample grabber in graph")); return hr; } // build the graph CComPtr<ICaptureGraphBuilder2> pCGB2; hr = pCGB2.CoCreateInstance (CLSID_CaptureGraphBuilder2, NULL, CLSCTX_INPROC); if (FAILED( hr )) ...{ Error(TEXT ("Can't get a ICaptureGraphBuilder2 reference")); return hr; } hr = pCGB2->SetFiltergraph( m_pGraph ); if (FAILED( hr )) ...{ Error(TEXT("SetGraph failed")); return hr; } // If there is a VP pin present on the video device, then put the // renderer on CLSID_NullRenderer CComPtr<IPin> pVPPin; hr = pCGB2->FindPin( pCap, PINDIR_OUTPUT, &PIN_CATEGORY_VIDEOPORT, NULL, FALSE, 0, &pVPPin); // If there is a VP pin, put the renderer on NULL Renderer CComPtr<IBaseFilter> pRenderer; if (S_OK == hr) ...{ hr = pRenderer.CoCreateInstance(CLSID_NullRenderer); if (S_OK != hr) ...{ Error(TEXT("Unable to make a NULL renderer")); return S_OK; } hr = m_pGraph->AddFilter(pRenderer, L"NULL renderer"); if (FAILED (hr)) ...{ Error(TEXT("Can't add the filter to graph")); return hr; } } hr = pCGB2->RenderStream( &PIN_CATEGORY_PREVIEW, &MEDIATYPE_Interleaved, pCap, pGrabBase, pRenderer); if (FAILED (hr)) ...{ // try to render preview pin hr = pCGB2->RenderStream( &PIN_CATEGORY_PREVIEW, &MEDIATYPE_Video, pCap, pGrabBase, pRenderer); // try to render capture pin if( FAILED( hr ) ) ...{ hr = pCGB2->RenderStream( &PIN_CATEGORY_CAPTURE, &MEDIATYPE_Video, pCap, pGrabBase, pRenderer); } } if( FAILED( hr ) ) ...{ Error( TEXT("Can't build the graph") ); return hr; } // ask for the connection media type so we know how big // it is, so we can write out bitmaps // AM_MEDIA_TYPE mt; hr = m_pGrabber->GetConnectedMediaType( &mt ); if ( FAILED( hr) ) ...{ Error( TEXT("Could not read the connected media type")); return hr; } VIDEOINFOHEADER * vih = (VIDEOINFOHEADER*) mt.pbFormat; /**//* mCB.pOwner = this; mCB.lWidth = vih->bmiHeader.biWidth; mCB.lHeight = vih->bmiHeader.biHeight;*/ FreeMediaType( mt ); // don't buffer the samples as they pass through // hr = m_pGrabber->SetBufferSamples( FALSE ); // only grab one at a time, stop stream after // grabbing one sample // hr = m_pGrabber->SetOneShot( FALSE ); // set the callback, so we can grab the one sample // // hr = m_pGrabber->SetCallback( &mCB, 1 ); // find the video window and stuff it in our window // CComQIPtr< IVideoWindow, &IID_IVideoWindow > pWindow = m_pGraph; if( !pWindow ) ...{ Error( TEXT("Could not get video window interface")); return E_FAIL; } // set up the preview window to be in our dialog // instead of floating popup // HWND hwndPreview = NULL; GetDlgItem( IDC_STATIC_VIDEO, &hwndPreview ); RECT rc; ::GetWindowRect( hwndPreview, &rc ); hr = pWindow->put_Owner( (OAHWND) hwndPreview ); hr = pWindow->put_Left( 0 ); hr = pWindow->put_Top( 0 ); hr = pWindow->put_Width( rc.right - rc.left ); hr = pWindow->put_Height( rc.bottom - rc.top ); hr = pWindow->put_WindowStyle( WS_CHILD | WS_CLIPSIBLINGS ); hr = pWindow->put_Visible( OATRUE ); // Add our graph to the running object table, which will allow // the GraphEdit application to "spy" on our graph//#ifdef REGISTER_FILTERGRAPH// hr = AddGraphToRot(m_pGraph, &g_dwGraphRegister);// if (FAILED(hr))// {// Error(TEXT("Failed to register filter graph with ROT!"));// g_dwGraphRegister = 0;// }//#endif // run the graph // CComQIPtr< IMediaControl, &IID_IMediaControl > pControl = m_pGraph; hr = pControl->Run( ); if( FAILED( hr ) ) ...{ Error( TEXT("Could not run graph")); return hr; }// UpdateStatus(_T("Previewing Live Video")); return 0;}void CTestVideoDlg::GetDefaultCapDevice( IBaseFilter ** ppCap )...{ HRESULT hr; ASSERT(ppCap); if (!ppCap) return; *ppCap = NULL; // create an enumerator // CComPtr< ICreateDevEnum > pCreateDevEnum; pCreateDevEnum.CoCreateInstance( CLSID_SystemDeviceEnum ); ASSERT(pCreateDevEnum); if( !pCreateDevEnum ) return; // enumerate video capture devices // CComPtr< IEnumMoniker > pEm; pCreateDevEnum->CreateClassEnumerator( CLSID_VideoInputDeviceCategory, &pEm, 0 ); ASSERT(pEm); if( !pEm ) return; pEm->Reset( ); // go through and find first video capture device // while( 1 ) ...{ ULONG ulFetched = 0; CComPtr< IMoniker > pM; hr = pEm->Next( 1, &pM, &ulFetched ); if( hr != S_OK ) break; // get the property bag interface from the moniker // CComPtr< IPropertyBag > pBag; hr = pM->BindToStorage( 0, 0, IID_IPropertyBag, (void**) &pBag ); if( hr != S_OK ) continue; // ask for the english-readable name // CComVariant var; var.vt = VT_BSTR; hr = pBag->Read( L"FriendlyName", &var, NULL ); if( hr != S_OK ) continue; // set it in our UI // USES_CONVERSION;// SetDlgItemText( IDC_CAPOBJ, W2T( var.bstrVal ) ); // ask for the actual filter // hr = pM->BindToObject( 0, 0, IID_IBaseFilter, (void**) ppCap ); if( *ppCap ) break; } return;}
3.其中要的類庫都在directshow的SDK例子中能找到.