VC中实现VFW的时时视频捕捉

Visual C++ Code

#include <AFX.h> #include "StdAfx.h" #include <VFW.H> #include <stdio.h> #pragma comment(lib,"VFW32.LIB") HWND AVIhWnd = 0; HWND hWnd = 0; HDC hDC = 0; HDC ScenehDC = 0; DWORD AVIWidth = 640; DWORD AVIHeight = 480; DWORD DCColorBits = 32; BYTE BmpByte[1920*480]; BITMAPINFO DCitmap; HBITMAP SceneBitmap; HGDIOBJ AboriginaalObject; LPCSTR szClassName; LPCSTR szWindowTitle; long X; long Y; long OutWidth; long InputWidth; long cR; long cG; long cB; static LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM); static LRESULT CALLBACK FrameCallbackProc(HWND, LPVIDEOHDR); int APIENTRY WinMain(HINSTANCE hInstance,                      HINSTANCE hPrevInstance,                      LPSTR     lpCmdLine,                      int       nCmdShow) {     szClassName = "myClass";     szWindowTitle = "MyWindow";     WNDCLASS  wc;     wc.style = CS_HREDRAW|CS_VREDRAW;     wc.lpfnWndProc = MainWndProc;     wc.cbClsExtra = 0;     wc.cbWndExtra = 0;     wc.hInstance = hInstance;     wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);     wc.hCursor = LoadCursor(NULL, IDC_ARROW);     wc.hbrBackground = (HBRUSH)(COLOR_3DSHADOW);     wc.lpszMenuName =  NULL;     wc.lpszClassName = szClassName;     RegisterClass(&wc);     hWnd = CreateWindow(szClassName,                         szWindowTitle,                         WS_OVERLAPPEDWINDOW,                         CW_USEDEFAULT,                         CW_USEDEFAULT,                         AVIWidth,                         AVIHeight,                         NULL,                         NULL,                         hInstance,                         NULL);     if (!hWnd){         MessageBox(0,TEXT("创建窗口失败！/r/n"),"", MB_OK);          return (FALSE);     }     ShowWindow(hWnd, SW_SHOWNORMAL);     UpdateWindow(hWnd);     ScenehDC = CreateCompatibleDC(hDC);     ZeroMemory(&DCitmap.bmiHeader, sizeof(BITMAPINFOHEADER));     DCitmap.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);     DCitmap.bmiHeader.biBitCount = 24;     DCitmap.bmiHeader.biWidth = AVIWidth;     DCitmap.bmiHeader.biHeight = AVIHeight;     DCitmap.bmiHeader.biPlanes = 1;     DCitmap.bmiHeader.biClrUsed = 0;     DCitmap.bmiHeader.biClrImportant = 0;     DCitmap.bmiHeader.biSizeImage = AVIWidth * AVIHeight * (DCitmap.bmiHeader.biBitCount / 8);     SceneBitmap = CreateDIBSection(ScenehDC, &DCitmap, DIB_RGB_COLORS, NULL ,0 , 0);     AboriginaalObject = SelectObject(ScenehDC, (HGDIOBJ)SceneBitmap);     OutWidth = AVIWidth * 3;     InputWidth = AVIWidth * 3;     int rd;     BITMAPINFOHEADER bmpFormat;     AVIhWnd = capCreateCaptureWindow((LPSTR)"视频追踪",                                      WS_CHILD  | WS_VISIBLE,                                      0, 0, AVIWidth, AVIHeight,                                      hWnd,                                      1);     if (AVIhWnd==0)     {         MessageBox(hWnd, "创建AVI窗口失败","提示",64);     }else{         hDC = GetWindowDC(hWnd);         capSetCallbackOnFrame(AVIhWnd,(FARPROC)FrameCallbackProc);         rd = capDriverConnect(AVIhWnd,0);         if(rd != 0){             CAPDRIVERCAPS *Caps;             capDriverGetCaps(AVIhWnd,sizeof(CAPDRIVERCAPS),&Caps);             capPreviewRate(AVIhWnd, 30);         }else{             MessageBox(hWnd, "不能打开设备驱动。","提示",64);         }     }     MSG msg;     while (GetMessage(&msg, NULL, 0, 0)) {         TranslateMessage(&msg);         DispatchMessage(&msg);     }     SelectObject(ScenehDC, AboriginaalObject);     DeleteObject((HGDIOBJ)SceneBitmap);     DeleteDC(ScenehDC);     return 0; } LRESULT CALLBACK MainWndProc(HWND hWnd,UINT Message,WPARAM wParam,LPARAM lParam) {     switch (Message) {     case WM_DESTROY:         PostQuitMessage(0);         break;     default:         return (DefWindowProc(hWnd, Message, wParam, lParam));     }     return 0; } LRESULT CALLBACK FrameCallbackProc(HWND ghWnd,LPVIDEOHDR lpVData) {     for(Y=1; Y<=AVIHeight; Y++)     {         for(X=1; X<=AVIWidth; X++)         {             cB = lpVData->lpData[((AVIHeight-Y)*InputWidth)+(X*3)];             cG = lpVData->lpData[((AVIHeight-Y)*InputWidth)+(X*3)+1];             cR = lpVData->lpData[((AVIHeight-Y)*InputWidth)+(X*3)+2];             BmpByte[((Y-1)*OutWidth)+(X*3)]=cB;             BmpByte[((Y-1)*OutWidth)+(X*3)+1]=cG;             BmpByte[((Y-1)*OutWidth)+(X*3)+2]=cR;         }     }     SetBitmapBits(SceneBitmap,sizeof(BmpByte),BmpByte);     BitBlt(hDC, 0, 0, AVIWidth, AVIHeight, ScenehDC, 0, 0, SRCCOPY);     return 0; }