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Your question is a bit character, I don't understand what it is!
Go to the VC camera control SDK source code!
#include <windows.h>
#include <stdio.h>
#include <vfw.h>
#pragma comment(lib,"vfw32.lib")
HWND ghWndCap; //handle of capture window
CAPDRIVERCAPS gCapDriverCaps; //Capability of video driver
CAPSTATUS gCapStatus; //Capture the status of the window
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;//Get the status of the capture window
capGetStatus(ghWndCap,&gCapStatus,sizeof(CAPSTATUS));//Update the size of the capture window
SetWindowPos(ghWndCap,NULL,0,0,gCapStatus.uiImageWidth,gCapStatus.uiImageHeight,SWP_NOZORDER|SWP_NOMOVE);
if(nID==0){//Clear old status information
SetWindowText(ghWndCap,(LPSTR)"hello");
return (LRESULT)TRUE;
}//Display status ID and status text
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;//Remove the old error
wsprintf(gachBuffer,"Error# %d",nErrID);//Display error ID and text
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;//Assume that fp is an open .dat file pointer
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); // Connect the capture window to the driver
//Get the ability of the driver, the relevant information is placed in the structure variable gCapDriverCaps
capDriverGetCaps(ghWndCap,&gCapDriverCaps,sizeof(CAPDRIVERCAPS));
capPreviewRate(ghWndCap, 66); // Set the display rate of Preview mode
capPreview(ghWndCap, TRUE); //Start Preview mode
if(gCapDriverCaps.fHasOverlay) //Check if the drive has overlay capability
capOverlay(ghWndCap,TRUE); //Start Overlay mode
if(gCapDriverCaps.fHasDlgVideoSource)capDlgVideoSource(ghWndCap); //Video source dialog
if(gCapDriverCaps.fHasDlgVideoFormat)capDlgVideoFormat(ghWndCap); // Video format dialog
if(gCapDriverCaps.fHasDlgVideoDisplay)capDlgVideoDisplay(ghWndCap); // Video display dialog
capFileSetCaptureFile( ghWndCap, szCaptureFile); //Specify the capture file name
capFileAlloc(ghWndCap, (1024L * 1024L * 5)); //allocate storage space for the capture file
capCaptureSequence(ghWndCap); //Start capturing video sequence
capGrabFrame(ghWndCap); //Capture single frame image
}
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);//Stop capturing
capDriverDisconnect(ghWndCap); //Disconnect the capture window from the driver
PostQuitMessage(0);
}
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
} |
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Lithuania
Post time: 2020-1-2 19:30:01
Latvia
Author
United States