[Reprint] VC-camera control SDK source code

Reprinted] VC-camera control SDK source code

Information Source: FIG http://www.cnasm.com/

# Include <windows. h>
# Include <stdio. h>
# Include <VFW. h>
# Pragma comment (Lib, "vfw32.lib ")

Hwnd ghwndcap; // capture window handle
Capdrivercaps gcapdrivercaps; // video drive capability
Capstatus gcapstatus; // The status of the capture window.
Char szcapturefile [] = "mycap. Avi ";
Char gachbuffer [20];

Lresult callback wndproc (hwnd, uint, wparam, lparam );

Lresult callback statuscallbackproc (hwnd, int NID, lpstr lpstatustext)
{
If (! Ghwndcap) return false; // get the capture window status
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 the 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, int nerrid, lpstr lperrortext)
{
If (! Ghwndcap) return false;
If (nerrid = 0) return true; // clear the old error
Wsprintf (gachbuffer, "Error # % d", nerrid); // display the error ID and text
MessageBox (hwnd, lperrortext, gachbuffer, mb_ OK | mb_iconexclamation );
Return (lresult) true;
}

Lresult callback framecallbackproc (hwnd, lpvideohdr lpvhdr)
{
File * FP;
Fp = fopen ("CARAM. dat", "W ");
If (! Ghwndcap) return false; // assume FP is an open. dat file pointer.
Fwrite (lpvhdr-> lpdata, 1, lpvhdr-> dwbufferlength, FP );
Return (lresult) true;
}

Int winapi winmain (hinstance, hinstance hprevinstance, pstr sz1_line, int icmdshow)
{
Static tchar szappname [] = text ("hellowin ");
Hwnd;
MSG;
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, 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, uint message, wparam, lparam)
{
HDC;
Paintstruct pS;
Rect;
Switch (Message)
{
Case wm_create:
{
Ghwndcap = capcreatecapturewindow (lpstr) "Capture window", ws_child | ws_visible, 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 drive
// Obtain the drive capability and put the relevant information in the Structure Variable gcapdrivercaps.
Capdrivergetcaps (ghwndcap, & gcapdrivercaps, sizeof (capdrivercaps ));
Cappreviewrate (ghwndcap, 66); // sets the display rate in preview mode.
Cappreview (ghwndcap, true); // start Preview mode
If (gcapdrivercaps. fhasoverlay) // check whether the drive has the overlay capability
Capoverlay (ghwndcap, true); // enable overlay Mode
If (gcapdrivercaps. fhasdlgvideosource) capdlgvideosource (ghwndcap); // video source dialog box
If (gcapdrivercaps. fhasdlgvideoformat) capdlgvideoformat (ghwndcap); // video format dialog box
If (gcapdrivercaps. fhasdlgvideodisplay) capdlgvideodisplay (ghwndcap); // video display dialog box
Capfilesetcapturefile (ghwndcap, szcapturefile); // specify the capture file name
Capfilealloc (ghwndcap, (1024l * 1024l * 5); // allocate storage space for captured files
Capcapturesequence (ghwndcap); // starts to capture the video sequence
Capgrabframe (ghwndcap); // capture a 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 capture
Capdriverdisconnect (ghwndcap); // disconnect the capture window from the drive
Postquitmessage (0 );
}
Return 0;
}
Return defwindowproc (hwnd, message, wparam, lparam );
}

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