Programm in Visual Basic Programm einbetten [Archiv]

robocat

17.09.2007, 23:27

als ich noch eine webcam hatte, habe ich mir folgenden code abgewandelt (ist eigentlich für borland c++). je nachdem wie fit du mit win32 bist, kannst du damit evtl etwas anfangen.

//---------------------------------------------------------------------------
/*
* Copyright (c) Allan Petersen, 2001.
* This is a tutorial for a simple capture system using the win32 api
* for accessing your webcam
*
* (c) Copyright 2001, Allan Petersen
* ALL RIGHTS RESERVED
* Permission to use, copy, modify, and distribute this software for
* any purpose and without fee is hereby granted, provided that the above
* copyright notice appear in all copies and that both the copyright notice
* and this permission notice appear in supporting documentation, and that
* the name of Allan Petersen not be used in advertising
* or publicity pertaining to distribution of the software without specific,
* written prior permission.
*
* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL ALLAN
* PETERSEN BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
* THIRD PARTIES, WHETHER OR NOT ALLAN PETERSEN HAS BEEN
* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Contact Allan Petersen at <support@allanpetersen.com> or visit
* www.allanpetersen.com
*
*/
//---------------------------------------------------------------------------

#include <vcl.h>
#pragma hdrstop

#include <stdio.h>
#include "c_cap.h"

//---------------------------------------------------------------------------
#pragma package(smart_init)

__fastcall TCap::TCap (HWND Handle)
{
// create video capture window
ParentHandle = Handle;
hwndVideo = capCreateCaptureWindow(
(LPSTR) "My Capture Window",
WS_CHILD | WS_VISIBLE,
0, 0, 300, 200,
(HWND) Handle,
(int) 1);

pStringCapDrivers = new TStringList;
SelectedDevice = -1;
}

__fastcall TCap::~TCap ()
{

delete pStringCapDrivers;

capPreview(hwndVideo, FALSE); // end preview
capDriverConnect(hwndVideo, SelectedDevice);
capDriverDisconnect(hwndVideo); // disconnect from driver
}

//---------------------------------------------------------------------------
// enumerate the installed capture drivers
//---------------------------------------------------------------------------
int TCap::EnumCapDrv ()
{
char szDeviceName[80]; // driver name
char szDeviceVersion[80]; // driver version
char str[161]; // concatinated string
int xcap; // counter

xcap = 0;
pStringCapDrivers->Clear ();
do {
if (capGetDriverDescription(xcap, szDeviceName, sizeof(szDeviceName),
szDeviceVersion, sizeof(szDeviceVersion))){

sprintf (str, "%s, %s", szDeviceName, szDeviceVersion);
pStringCapDrivers->AddObject (str, (TObject *)xcap);
}
else {
break;
}
xcap++;
} while (true);

return 0;
}

//---------------------------------------------------------------------------
// connecting to selected device and starts preview
//---------------------------------------------------------------------------
void TCap::Connect (int Selected)
{
CAPSTATUS CapStatus;
int hsize;

// capDlgVideoDisplay(hwndVideo);
// connect to the driver
if (SelectedDevice != -1) {
capPreview (hwndVideo, FALSE);
capDriverConnect(hwndVideo, SelectedDevice);
}

if (!capDriverConnect(hwndVideo, Selected)) {
// ---- Unable to connect to driver
return;
}

// update the driver capabilities
capDriverGetCaps (hwndVideo, sizeof(CAPDRIVERCAPS), &CapDrvCaps);

capDlgVideoFormat(ParentHandle);

// Are there new image dimensions
capGetStatus(hwndVideo, &CapStatus, sizeof(CAPSTATUS));

hsize = GetSystemMetrics(SM_CYMENU);
hsize += GetSystemMetrics(SM_CYCAPTION);

// ---- Rescaling the windows
SetWindowPos(hwndVideo, NULL, 0, 0, CapStatus.uiImageWidth,
CapStatus.uiImageHeight, SWP_NOZORDER | SWP_NOMOVE);
SetWindowPos(ParentHandle, NULL, 0, hsize, CapStatus.uiImageWidth,
CapStatus.uiImageHeight+hsize, SWP_NOZORDER | SWP_NOMOVE);

// set preview rate to 33.3 miliseconds, or 30 FPS
capPreviewRate (hwndVideo, 33.3);

// start preview video
capPreview (hwndVideo, TRUE);

// ---- Remember selected device
SelectedDevice = Selected;
}

//---------------------------------------------------------------------------
// Get access to the video source format box
//---------------------------------------------------------------------------
void TCap::Format ()
{
int hsize;

CAPSTATUS CapStatus;

capDlgVideoFormat(hwndVideo);
// Are there new image dimensions
capGetStatus(hwndVideo, &CapStatus, sizeof(CAPSTATUS));

hsize = GetSystemMetrics(SM_CYMENU);
hsize += GetSystemMetrics(SM_CYCAPTION);

SetWindowPos(ParentHandle, NULL, 0, hsize, CapStatus.uiImageWidth,
CapStatus.uiImageHeight+hsize, SWP_NOZORDER | SWP_NOMOVE);
SetWindowPos(hwndVideo, NULL, 0, 0, CapStatus.uiImageWidth,
CapStatus.uiImageHeight, SWP_NOZORDER | SWP_NOMOVE);
}
//---------------------------------------------------------------------------
// Get access to the video source dialog box
//---------------------------------------------------------------------------
void TCap::Source ()
{
capDlgVideoSource(hwndVideo);
}

//---------------------------------------------------------------------------
// capture a frame and save it
//---------------------------------------------------------------------------
void TCap::CaptureFrame (char *FileName)
{
capFileSaveDIB (hwndVideo, FileName);
}

du kannst auch mit region-skinning ein loch in dein anwendungsfenster machen, so dass dort der inhalt des anderen fensters zu sehen ist. oder du kannst dir ein handle auf das begehrte fenster besorgen und den inhalt in dein eigenes streamen. das geht aber beides nur als dirty-workaround durch ;)