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摄像头控制
error997 (error997)    2014-11-20 20:21:07      目标    课题
切换到: 纯代码  
   
//VC-摄像头控制SDK源码
#include <windows.h>
#include <stdio.h>
#include <vfw.h>
#pragma comment(lib,"vfw32.lib")

HWND ghWndCap ; //捕获窗的句柄 
CAPDRIVERCAPS gCapDriverCaps ; //视频驱动器的能力 
CAPSTATUS gCapStatus ; //捕获窗的状态 
char szCaptureFile[] = "MYCAP.AVI";
char gachBuffer[20];

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

LRESULT CALLBACK StatusCallbackProc(HWND hWnd,int nID,LPSTR lpStatusText)
{
    if(!ghWndCap) return FALSE;//获得捕获窗的状态
    capGetStatus(ghWndCap,&gCapStatus,sizeof(CAPSTATUS));//更新捕获窗的大小
    SetWindowPos(ghWndCap,NULL,0,0,gCapStatus.uiImageWidth,gCapStatus.uiImageHeight,SWP_NOZORDER|SWP_NOMOVE);
    if(nID==0)
    {
        //清除旧的状态信息
        SetWindowText(ghWndCap,(LPSTR)"hello");
        return (LRESULT)TRUE;
    }
    //显示状态ID和状态文本
    wsprintf(gachBuffer,"Status# %d: %s",nID,lpStatusText);
    SetWindowText(ghWndCap,(LPSTR)gachBuffer);
    return (LRESULT)TRUE;
}

LRESULT CALLBACK ErrorCallbackProc(HWND hWnd,int nErrID,LPSTR lpErrorText)
{
    if(!ghWndCap)return FALSE;
    if(nErrID==0)return TRUE;//清除旧的错误
    wsprintf(gachBuffer,"Error# %d",nErrID);//显示错误标识和文本
    MessageBox(hWnd, lpErrorText, gachBuffer,MB_OK | MB_ICONEXCLAMATION); 
    return (LRESULT) TRUE;
} 

LRESULT CALLBACK FrameCallbackProc(HWND hWnd,LPVIDEOHDR lpVHdr)
{
    FILE *fp;
    fp=fopen("caram.dat","w");
    if(!ghWndCap)return FALSE;//假设fp为一打开的.dat文件指针
    fwrite(lpVHdr->lpData,1,lpVHdr->dwBufferLength,fp);
    return (LRESULT)TRUE;
} 


int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR szCmdLine,int iCmdShow)
{
    static TCHAR szAppName[]=TEXT("HelloWin");
    HWND hwnd;
    MSG msg;
    WNDCLASS wndclass;
    wndclass.style=CS_HREDRAW|CS_VREDRAW;
    wndclass.lpfnWndProc=WndProc;
    wndclass.cbClsExtra=0;
    wndclass.cbWndExtra=0;
    wndclass.hInstance=hInstance;
    wndclass.hIcon=LoadIcon(NULL,IDI_APPLICATION);
    wndclass.hCursor=LoadCursor(NULL,IDC_ARROW);
    wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
    wndclass.lpszMenuName=NULL;
    wndclass.lpszClassName=szAppName;
    if(!RegisterClass(&wndclass))
    {
        MessageBox(NULL,TEXT("This program requires WindowsNT!"),szAppName,MB_ICONERROR);
        return 0;
    }
    hwnd=CreateWindow(szAppName,TEXT("The Hello Program"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,hInstance,NULL);
    ShowWindow(hwnd,iCmdShow);
    UpdateWindow(hwnd);
    while(GetMessage(&msg,NULL,0,0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
    HDC hdc;
    PAINTSTRUCT ps;
    RECT rect;
    switch(message)
    {
    case WM_CREATE:
        {
            ghWndCap=capCreateCaptureWindow((LPSTR)"Capture  Window",WS_CHILD|WS_VISIBLE,0,0,300,240,(HWND)hwnd,(int)0); 
            capSetCallbackOnError(ghWndCap,(FARPROC)ErrorCallbackProc); 
            capSetCallbackOnStatus(ghWndCap,(FARPROC)StatusCallbackProc);
            capSetCallbackOnFrame(ghWndCap,(FARPROC)FrameCallbackProc);
            capDriverConnect(ghWndCap,0); // 将捕获窗同驱动器连接  
            //获得驱动器的能力,相关的信息放在结构变量gCapDriverCaps中
            capDriverGetCaps(ghWndCap,&gCapDriverCaps,sizeof(CAPDRIVERCAPS));
            capPreviewRate(ghWndCap, 66); // 设置Preview模式的显示速率 
            capPreview(ghWndCap, TRUE); //启动Preview模式
            if(gCapDriverCaps.fHasOverlay) //检查驱动器是否有叠加能力 
                capOverlay(ghWndCap,TRUE); //启动Overlay模式
            if(gCapDriverCaps.fHasDlgVideoSource)capDlgVideoSource(ghWndCap); //Video source 对话框 
            if(gCapDriverCaps.fHasDlgVideoFormat)capDlgVideoFormat(ghWndCap); // Video format 对话框 
            if(gCapDriverCaps.fHasDlgVideoDisplay)capDlgVideoDisplay(ghWndCap); // Video display 对话框
            capFileSetCaptureFile( ghWndCap, szCaptureFile); //指定捕获文件名 
            capFileAlloc(ghWndCap, (1024L * 1024L * 5)); //为捕获文件分配存储空间 
            capCaptureSequence(ghWndCap); //开始捕获视频序列
            capGrabFrame(ghWndCap); //捕获单帧图像 
            
        }
        return 0;
    case WM_PAINT:
        hdc=BeginPaint(hwnd,&ps);
        GetClientRect(hwnd,&rect);
        DrawText(hdc,TEXT("Hello,Windows98!"),-1,&rect,DT_SINGLELINE|DT_CENTER|DT_VCENTER);
        EndPaint(hwnd,&ps);
        return 0;
    case WM_DESTROY:
        {
            capSetCallbackOnStatus(ghWndCap,NULL);
            capSetCallbackOnError(ghWndCap,NULL); 
            capSetCallbackOnFrame(ghWndCap,NULL);
            capCaptureAbort(ghWndCap);//停止捕获 
            capDriverDisconnect(ghWndCap); //将捕获窗同驱动器断开 
            PostQuitMessage(0);
        }
        return 0;
    }
    return DefWindowProc(hwnd,message,wParam,lParam);
}


转自 http://blog.csdn.net/y___y/article/details/1658399
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