//open sequence grabber component instance and draw to window
CWinVideoGrabber::CWinVideoGrabber(HWND whichwindow)
{
parentwindow = whichwindow;
videomode = VIDEOGRABBERMODE_NONE;
videowindow = capCreateCaptureWindow("CAPTURE", WS_CHILD | WS_VISIBLE, 0, 0, 160, 120, (HWND) whichwindow, winid++);
SendMessage (videowindow, WM_CAP_DRIVER_CONNECT, 0, 0L);
capPreviewScale(videowindow,True);
capPreviewRate(videowindow, 50);
Init();
}
static int vfw_init (zbar_video_t *vdo,
uint32_t fmt)
{
if(vfw_set_format(vdo, fmt))
return(-1);
HWND hwnd = vdo->state->hwnd;
CAPTUREPARMS cp;
if(!capCaptureGetSetup(hwnd, &cp, sizeof(cp)))
return(err_capture(vdo, SEV_ERROR, ZBAR_ERR_WINAPI, __func__,
"retrieving capture parameters"));
cp.dwRequestMicroSecPerFrame = 33333;
cp.fMakeUserHitOKToCapture = 0;
cp.wPercentDropForError = 90;
cp.fYield = 1;
cp.wNumVideoRequested = vdo->num_images;
cp.fCaptureAudio = 0;
cp.vKeyAbort = 0;
cp.fAbortLeftMouse = 0;
cp.fAbortRightMouse = 0;
cp.fLimitEnabled = 0;
if(!capCaptureSetSetup(hwnd, &cp, sizeof(cp)))
return(err_capture(vdo, SEV_ERROR, ZBAR_ERR_WINAPI, __func__,
"setting capture parameters"));
if(!capCaptureGetSetup(hwnd, &cp, sizeof(cp)))
return(err_capture(vdo, SEV_ERROR, ZBAR_ERR_WINAPI, __func__,
"checking capture parameters"));
/* ignore errors since we skipped checking fHasOverlay */
capOverlay(hwnd, 0);
if(!capPreview(hwnd, 0) ||
!capPreviewScale(hwnd, 0))
err_capture(vdo, SEV_WARNING, ZBAR_ERR_WINAPI, __func__,
"disabling preview");
if(!capSetCallbackOnVideoStream(hwnd, vfw_stream_cb) ||
!capSetCallbackOnError(hwnd, vfw_error_cb))
return(err_capture(vdo, SEV_ERROR, ZBAR_ERR_BUSY, __func__,
"setting capture callbacks"));
vdo->num_images = cp.wNumVideoRequested;
vdo->iomode = VIDEO_MMAP; /* driver provides "locked" buffers */
zprintf(3, "initialized video capture: %d buffers %ldms/frame\n",
vdo->num_images, cp.dwRequestMicroSecPerFrame);
return(0);
}
// Initialize camera input
bool CvCaptureCAM_VFW::open( int wIndex )
{
char szDeviceName[80];
char szDeviceVersion[80];
HWND hWndC = 0;
close();
if( (unsigned)wIndex >= 10 )
wIndex = 0;
for( ; wIndex < 10; wIndex++ )
{
if( capGetDriverDescription( wIndex, szDeviceName,
sizeof (szDeviceName), szDeviceVersion,
sizeof (szDeviceVersion)))
{
hWndC = capCreateCaptureWindow ( "My Own Capture Window",
WS_POPUP | WS_CHILD, 0, 0, 320, 240, 0, 0);
if( capDriverConnect (hWndC, wIndex))
break;
DestroyWindow( hWndC );
hWndC = 0;
}
}
if( hWndC )
{
capWnd = hWndC;
hdr = 0;
hic = 0;
fourcc = (DWORD)-1;
memset( &caps, 0, sizeof(caps));
capDriverGetCaps( hWndC, &caps, sizeof(&caps));
::MoveWindow( hWndC, 0, 0, 320, 240, TRUE );
capSetUserData( hWndC, (size_t)this );
capSetCallbackOnFrame( hWndC, frameCallback );
CAPTUREPARMS p;
capCaptureGetSetup(hWndC,&p,sizeof(CAPTUREPARMS));
p.dwRequestMicroSecPerFrame = 66667/2;
capCaptureSetSetup(hWndC,&p,sizeof(CAPTUREPARMS));
//capPreview( hWndC, 1 );
capPreviewScale(hWndC,FALSE);
capPreviewRate(hWndC,1);
}
return capWnd != 0;
}
/**
* Set camera preview window
*/
static HWND camera_set_preview_window(javacall_handle handle,
int x, int y, int w, int h, BOOL visible)
{
#define DEFAULT_CAPTURE_DRIVER 0
#define DEFAULT_PREVIEW_RATE 150
/* ms unit => Increase this value to optimize performance */
BOOL ret;
camera_handle* pHandle = (camera_handle*)handle;
DWORD wsVisible = TRUE == visible ? WS_VISIBLE : 0;
camera_destroy_window(pHandle);
JAVA_DEBUG_PRINT4("[camera] capCreateCaptureWindow %d %d %d %d\n", x, y, w, h);
pHandle->hCapWnd = capCreateCaptureWindow(_T("Sun_Java_Cap_Window"),
wsVisible | WS_CHILD | WS_CLIPSIBLINGS,
x + X_SCREEN_OFFSET, y + Y_SCREEN_OFFSET + TOP_BAR_HEIGHT,
w, h, GET_MCIWND_HWND(), 0xffff);
JAVA_DEBUG_PRINT1("[camera] capCreateCaptureWindow %d\n", pHandle->hCapWnd);
if (pHandle->hCapWnd) {
ret = capDriverConnect(pHandle->hCapWnd, DEFAULT_CAPTURE_DRIVER);
if (FALSE == ret) {
JAVA_DEBUG_PRINT(
"[camera] capDriverConnect fail - is there camera attached?\n");
DestroyWindow(pHandle->hCapWnd);
pHandle->hCapWnd = NULL;
return NULL;
}
capSetCallbackOnFrame(pHandle->hCapWnd, camera_grabber_callback);
capPreviewScale(pHandle->hCapWnd, TRUE);
capPreviewRate(pHandle->hCapWnd, DEFAULT_PREVIEW_RATE);
}
return pHandle->hCapWnd;
}
// Initialize camera input
bool CvCaptureCAM_VFW::open( int wIndex )
{
char szDeviceName[80];
char szDeviceVersion[80];
HWND hWndC = 0;
close();
if( (unsigned)wIndex >= 10 )
wIndex = 0;
for( ; wIndex < 10; wIndex++ )
{
if( capGetDriverDescription( wIndex, szDeviceName,
sizeof (szDeviceName), szDeviceVersion,
sizeof (szDeviceVersion)))
{
hWndC = capCreateCaptureWindow ( "My Own Capture Window",
WS_POPUP | WS_CHILD, 0, 0, 320, 240, 0, 0);
if( capDriverConnect (hWndC, wIndex))
break;
DestroyWindow( hWndC );
hWndC = 0;
}
}
if( hWndC )
{
capWnd = hWndC;
hdr = 0;
hic = 0;
fourcc = (DWORD)-1;
memset( &caps, 0, sizeof(caps));
capDriverGetCaps( hWndC, &caps, sizeof(caps));
CAPSTATUS status = {};
capGetStatus(hWndC, &status, sizeof(status));
::SetWindowPos(hWndC, NULL, 0, 0, status.uiImageWidth, status.uiImageHeight, SWP_NOZORDER|SWP_NOMOVE);
capSetUserData( hWndC, (size_t)this );
capSetCallbackOnFrame( hWndC, frameCallback );
CAPTUREPARMS p;
capCaptureGetSetup(hWndC,&p,sizeof(CAPTUREPARMS));
p.dwRequestMicroSecPerFrame = 66667/2; // 30 FPS
capCaptureSetSetup(hWndC,&p,sizeof(CAPTUREPARMS));
//capPreview( hWndC, 1 );
capPreviewScale(hWndC,FALSE);
capPreviewRate(hWndC,1);
// Get frame initial parameters.
const DWORD size = capGetVideoFormatSize(capWnd);
if( size > 0 )
{
unsigned char *pbi = new unsigned char[size];
if( pbi )
{
if( capGetVideoFormat(capWnd, pbi, size) == size )
{
BITMAPINFOHEADER& vfmt = ((BITMAPINFO*)pbi)->bmiHeader;
widthSet = vfmt.biWidth;
heightSet = vfmt.biHeight;
fourcc = vfmt.biCompression;
}
delete []pbi;
}
}
// And alternative way in case of failure.
if( widthSet == 0 || heightSet == 0 )
{
widthSet = status.uiImageWidth;
heightSet = status.uiImageHeight;
}
}
return capWnd != 0;
}
long __stdcall DlgProc ( HWND hWnd , unsigned msg , unsigned wParam , long lParam )
{
switch(msg)
{
case WM_INITDIALOG:
//hEdit = GetDlgItem( hWnd , I_EDIT );
//GetClientRect( hEdit , &rect );
hWndCap = capCreateCaptureWindow ( NULL, WS_CHILD | WS_VISIBLE , 0, 0, 320, 240, hWnd, 1235 );
//hWndCap = capCreateCaptureWindow ( NULL, WS_CHILD | WS_VISIBLE , 0, 0, (rect.right-rect.left ), (rect.bottom-rect.top), hEdit, 1235);
// вручную заполняем структуру CapVar
ZeroMemory( &CapVar, sizeof(COMPVARS) );
CapVar.cbSize = sizeof(COMPVARS);
CapVar.dwFlags = ICMF_COMPVARS_VALID;
CapVar.cbState = 0;
CapVar.fccHandler = mmioFOURCC( 'x', '2', '6', '4' );
CapVar.fccType = ICTYPE_VIDEO;
// открываем декомпрессор (долго)
CapVar.hic = ICOpen( ICTYPE_VIDEO, CapVar.fccHandler, ICMODE_COMPRESS );
hThread = CreateThread( NULL, 0, (LPTHREAD_START_ROUTINE)SendThread, NULL, 0, 0 );
return -1 ;
case WM_COMMAND:
switch(LOWORD(wParam))
{
case I_BUTTON_CONN :
if( !capDriverConnect( hWndCap, 0 ) )
{
EndDialog ( hWnd, 0 );
return -1;
}
capCaptureGetSetup( hWndCap, &CapParms, sizeof(CAPTUREPARMS) );
CapParms.dwRequestMicroSecPerFrame = 66000;
CapParms.fLimitEnabled = FALSE;
CapParms.fCaptureAudio = FALSE;
CapParms.fMCIControl = FALSE;
CapParms.fYield = TRUE;
CapParms.vKeyAbort = VK_ESCAPE;
CapParms.fAbortLeftMouse = FALSE;
CapParms.fAbortRightMouse = FALSE;
capCaptureSetSetup( hWndCap, &CapParms, sizeof(CAPTUREPARMS) );
capPreviewScale( hWndCap, 1 );
capPreviewRate( hWndCap, 66 );
capPreviewScale( hWndCap, FALSE );
capPreview( hWndCap, 1 );
//added by jimmy
// OPTIONAL STEP: Setup resolution
capGetVideoFormat( hWndCap, &InputBmpInfo ,sizeof(InputBmpInfo) );
//InputBmpInfo.bmiHeader.biWidth = 320; //(rect.right-rect.left );
//InputBmpInfo.bmiHeader.biHeight = 240; //(rect.bottom-rect.top);
//InputBmpInfo.bmiHeader.biBitCount = 24;
capSetVideoFormat( hWndCap, &InputBmpInfo, sizeof(InputBmpInfo) );
//capDriverDisconnect (hWndCap, 0);//Can we do better?
//capDriverConnect (hWndCap, 0);
capSetCallbackOnFrame( hWndCap, FrameCallBack );
if(CapVar.hic > 0 )
{
OutFormatSize = ICCompressGetFormatSize( CapVar.hic, &InputBmpInfo.bmiHeader ); // BITMAPINFO возвращает размер структуры исходных данных InputBmpInfo
ICCompressGetFormat( CapVar.hic, &InputBmpInfo.bmiHeader, &OutputBmpInfo.bmiHeader ); // заполняет структуру получаемых данных OutputBmpInfo
OutBufferSize = ICCompressGetSize( CapVar.hic, &InputBmpInfo.bmiHeader, &OutputBmpInfo.bmiHeader ); // максимальный размер одного сжатого кадра (полученного)
ICSeqCompressFrameStart( &CapVar, &InputBmpInfo ); // начало сжатия
}
break;
case I_BUTTON_EXIT :
ICSeqCompressFrameEnd(&CapVar); // конец сжатия
ICCompressorFree(&CapVar);
ICClose(CapVar.hic);
capPreview( hWndCap , false );
capDriverDisconnect( hWndCap );
EndDialog ( hWnd , 0 ) ;
break;
}
return -1 ;
case WM_CLOSE :
ICSeqCompressFrameEnd(&CapVar); // конец сжатия
ICCompressorFree(&CapVar);
ICClose(CapVar.hic);
capPreview( hWndCap , false );
capDriverDisconnect( hWndCap );
EndDialog ( hWnd , 0 ) ;
return -1 ;
}
return 0 ;
}
