Windows SDK 视频捕获

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#include <windows.h>#include <vfw.h>#include <TCHAR.H>#pragma comment(lib, "vfw32.lib")HWND AVIhwnd;HWND hwnd;HDC hdc, hdcScene;DWORD AVIwidth = 640, AVIheight = 480;BYTE BmpByte[1920*480];BITMAPINFO bmpInfo;HBITMAP hBmpScene;HGDIOBJ hGDIObj;long InputWidth, OutputWidth;long cB, cG, cR;long X, Y;TCHAR szClassName[] = TEXT("Vedio");TCHAR szWindowTitle[] = TEXT("Vedio Catch");LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);LRESULT CALLBACK FrameCallbackProc(HWND, LPVIDEOHDR);int WINAPI WinMain(HINSTANCE hInstance,   HINSTANCE hPrevInstance,   LPSTR lpCmdLine,   int nCmdShow){ WNDCLASS wc; MSG msg; wc.style = CS_HREDRAW | CS_VREDRAW; wc.lpfnWndProc = WndProc; 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 = 0; wc.lpszClassName = szClassName;  if (!RegisterClass(&wc)) { MessageBox(NULL, TEXT("This program requires Windows NT!"), TEXT("ERROR NOTE!"), MB_ICONERROR); return 0; }  hwnd = CreateWindow(szClassName, szWindowTitle, WS_OVERLAPPEDWINDOW,CW_USEDEFAULT, CW_USEDEFAULT, AVIwidth, AVIheight,NULL, NULL, hInstance, NULL); ShowWindow(hwnd, SW_SHOWNORMAL); UpdateWindow(hwnd); //DIB结构体的各种属性设置 ZeroMemory(&bmpInfo.bmiHeader, sizeof(BITMAPINFOHEADER)); bmpInfo.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bmpInfo.bmiHeader.biBitCount = 24; bmpInfo.bmiHeader.biWidth = AVIwidth; bmpInfo.bmiHeader.biHeight = AVIheight; bmpInfo.bmiHeader.biPlanes = 1; bmpInfo.bmiHeader.biClrUsed = 0; bmpInfo.bmiHeader.biClrImportant = 0; bmpInfo.bmiHeader.biSizeImage = AVIwidth * AVIheight * bmpInfo.bmiHeader.biBitCount / 8; //把上面的biSizeImage写成了和前面一样的biSize，调试结果视频画面不动；找了好久原因~~~~不能马虎啊！ //创建应用程序可以直接写入的、与设备无关的位图（DIB） hdcScene = CreateCompatibleDC(hdc); hBmpScene = CreateDIBSection(hdcScene, &bmpInfo, DIB_RGB_COLORS, NULL, 0, 0); hGDIObj = SelectObject(hdcScene, hBmpScene); OutputWidth = AVIwidth * 3; InputWidth = AVIwidth * 3; //创建视频捕获窗口 AVIhwnd = capCreateCaptureWindow(szWindowTitle, WS_CHILD | WS_VISIBLE, 0, 0, AVIwidth, AVIheight, hwnd, 1); if (NULL == AVIhwnd) { MessageBox(hwnd, TEXT("Create Failed!"), TEXT("视频捕获"), MB_ICONERROR); return 0; } else { hdc = GetWindowDC(hwnd); //设置回调函数macro capSetCallbackOnFrame(AVIhwnd, FrameCallbackProc); //The capDriverConnect macro connects a capture window to a capture driver. BOOL flag = capDriverConnect(AVIhwnd, 0); if (flag) { CAPDRIVERCAPS Cps; capDriverGetCaps(AVIhwnd, &Cps, sizeof(CAPDRIVERCAPS)); //The capPreviewRate macro sets the frame display rate in preview mode.  capPreviewRate(AVIhwnd, 30); } else { MessageBox(hwnd, TEXT("不能打开设备驱动!"), TEXT("提示"), MB_ICONERROR); return 0; } } while (GetMessage(&msg, NULL, 0, 0)) { TranslateMessage(&msg); DispatchMessage(&msg); } SelectObject(hdcScene, hGDIObj); DeleteObject(hBmpScene); DeleteDC(hdcScene); return msg.wParam;}LRESULT CALLBACK WndProc(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)*OutputWidth)+(X*3)]=cB;            BmpByte[((Y-1)*OutputWidth)+(X*3)+1]=cG;            BmpByte[((Y-1)*OutputWidth)+(X*3)+2]=cR;}}SetBitmapBits(hBmpScene, sizeof(BmpByte), BmpByte);BitBlt(hdc, 0, 0, AVIwidth, AVIheight, hdcScene, 0, 0, SRCCOPY);return 0;}
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