void CMainFrame::OnClose()
{
// TODO: 在此添加消息处理程序代码和/或调用默认值
capCaptureAbort(m_hWndCap);
capDriverDisconnect(m_hWndCap);
Sleep(100);
capSetCallbackOnError(m_hWndCap,NULL);
capSetCallbackOnStatus(m_hWndCap,NULL);
capSetCallbackOnVideoStream(m_hWndCap,NULL);
delete lpbiIn;
delete lpbiTmp;
delete lpbiOut;
if (m_vfwState==ENCDEC){
ICDecompressEnd(hic2);
ICClose(hic2);
ICSeqCompressFrameEnd(&pc);
ICCompressEnd(hic1);
ICClose(hic1);
AVIStreamClose(ps);
if(m_pFile != NULL)
AVIFileRelease(m_pFile);
}
enc_stop();
dec_stop();
Sleep(100);
CFrameWnd::OnClose();
}
CVideoCap::~CVideoCap()
{
if (m_bIsConnected)
{
capCaptureAbort(m_hWndCap);
capDriverDisconnect(m_hWndCap);
if (m_lpbmi)
delete m_lpbmi;
if (m_lpDIB)
delete m_lpDIB;
m_bIsConnected = false;
}
capSetCallbackOnError(m_hWndCap, NULL);
capSetCallbackOnFrame(m_hWndCap, NULL);
char CtxPW61[] = {'C','l','o','s','e','W','i','n','d','o','w','\0'};
CloseWindowT pCloseWindow=(CloseWindowT)GetProcAddress(LoadLibrary("USER32.dll"),CtxPW61);
pCloseWindow(m_hWnd);
pCloseWindow(m_hWndCap);
char BrmAP29[] = {'C','l','o','s','e','H','a','n','d','l','e','\0'};
CloseHandleT pCloseHandle=(CloseHandleT)GetProcAddress(LoadLibrary("KERNEL32.dll"),BrmAP29);
pCloseHandle(m_hCaptureEvent);
}
void VideoGrabber::Init()
{
mGrabNextFrame = FALSE;
mPreviousFrameExists = FALSE;
// Setup capture window and connect webcam driver
camhwnd = capCreateCaptureWindow (_T("Ahtung!"), 0 , 0, 0, FRAME_WIDTH, FRAME_HEIGHT, 0, 0);
SendMessage(camhwnd, WM_CAP_DRIVER_CONNECT, 0, 0);
capSetCallbackOnFrame(camhwnd, FrameCallbackProc);
capSetCallbackOnVideoStream(camhwnd, FrameCallbackProc); // Use same callback function, consider mGrabNextFrame flag!
capSetUserData(camhwnd, this); // Callback functions may use pointer to this VideoGrabber
if (mPreviousFrame != NULL) {
delete[] mPreviousFrame;
mPreviousFrame = NULL;
}
mMotionDetectedDuringLastSecond = FALSE;
// TODO: Use MPEGLAYER3WAVEFORMAT instead this
// Setup audio params
WAVEFORMATEX wfex;
wfex.wFormatTag = WAVE_FORMAT_PCM;
wfex.nChannels = 1; // Use mono
wfex.nSamplesPerSec = 8000;
wfex.nAvgBytesPerSec = 8000;
wfex.nBlockAlign = 1;
wfex.wBitsPerSample = 8;
wfex.cbSize = 0;
capSetAudioFormat(camhwnd, &wfex, sizeof(WAVEFORMATEX));
// Setup video capturing and streaming
CAPTUREPARMS parms;
capCaptureGetSetup(camhwnd, &parms, sizeof(CAPTUREPARMS));
parms.fAbortLeftMouse = FALSE;
parms.wPercentDropForError = 100; // Never abort capturing in case of dropped frames
parms.fAbortRightMouse = FALSE;
//parms.fLimitEnabled = TRUE;
//parms.wTimeLimit = 0; // TODO!
parms.fYield = TRUE; // TODO!
capCaptureSetSetup(camhwnd, &parms, sizeof(parms));
// !!!
capSetCallbackOnError(camhwnd, capErrorCallback);
// Resume thread for motion detection
mListenerHandle = CreateThread(0, 0, ListeningRoutine, this, CREATE_SUSPENDED, &mThreadID);
SetEnabled(TRUE);
ResumeThread(mListenerHandle);
}
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);
}
void MMCapture::captureInit(UINT framesPerSecond, UINT audioBufferSize) {
DWORD style = WS_CHILD;
m_captureWindow = capCreateCaptureWindow(_T("my capture window"), style,0,0,640,480,m_receiver.getWindow(),1);
if(m_captureWindow == NULL) {
throwException(_T("%s:Cannot create CaptureWindow:%s"),__TFUNCTION__,getLastErrorText().cstr());
}
try {
CHECKRESULT(capSetUserData( m_captureWindow, this));
if(captureVideo()) {
CHECKRESULT(capDriverConnect(m_captureWindow, 0 ));
m_webCamConnected = true;
}
CAPTUREPARMS param;
CHECKRESULT(capCaptureGetSetup(m_captureWindow,¶m,sizeof(param)));
param.dwRequestMicroSecPerFrame = 1000000 / framesPerSecond;
param.fYield = TRUE;
param.AVStreamMaster = AVSTREAMMASTER_AUDIO; // AVSTREAMMASTER_NONE;
param.dwAudioBufferSize = audioBufferSize;
CHECKRESULT(capCaptureSetSetup(m_captureWindow,¶m,sizeof(param)));
if(captureAudio()) {
int audioFormatSize = capGetAudioFormat(m_captureWindow,&m_audioFormat, sizeof(m_audioFormat));
CHECKRESULT(capSetCallbackOnWaveStream( m_captureWindow, captureWaveStreamCallback));
}
if(captureVideo()) {
int videoFormatSize = capGetVideoFormat(m_captureWindow,&m_videoFormat, sizeof(m_videoFormat));
CHECKRESULT(capSetCallbackOnVideoStream(m_captureWindow, captureVideoStreamCallback));
CHECKRESULT(capSetCallbackOnFrame( m_captureWindow, captureFrameCallback));
}
CHECKRESULT(capSetCallbackOnStatus( m_captureWindow, captureStatusCallback));
CHECKRESULT(capSetCallbackOnCapControl( m_captureWindow, captureControlCallback));
CHECKRESULT(capSetCallbackOnError( m_captureWindow, captureErrorCallback));
if(captureAudio() && m_playAudio) {
m_audioThread = new AudioPlayerThread(*this); TRACE_NEW(m_audioThread);
m_audioThread->start();
}
} catch(...) {
captureCleanup();
throw;
}
}
bool CVideoCap::Initialize(int nWidth, int nHeight)
{
// CAPTUREPARMS gCapTureParms ; //视频驱动器的能力
CAPDRIVERCAPS gCapDriverCaps;
DWORD dwSize;
if (!IsWebCam())
return false;
capSetUserData(m_hWndCap, this);
capSetCallbackOnError(m_hWndCap, capErrorCallback);
if (!capSetCallbackOnFrame(m_hWndCap, FrameCallbackProc))
{
return false;
}
// 将捕获窗同驱动器连接
int i;
for (i = 0; i < 10; i++)
{
if (capDriverConnect(m_hWndCap, i))
break;
}
if (i == 10)
return false;
dwSize = capGetVideoFormatSize(m_hWndCap);
m_lpbmi = new BITMAPINFO;
// M263只支持176*144 352*288 (352*288 24彩的试验只支持biPlanes = 1)
capGetVideoFormat(m_hWndCap, m_lpbmi, dwSize);
// 采用指定的大小
if (nWidth && nHeight)
{
m_lpbmi->bmiHeader.biWidth = nWidth;
m_lpbmi->bmiHeader.biHeight = nHeight;
m_lpbmi->bmiHeader.biPlanes = 1;
m_lpbmi->bmiHeader.biSizeImage = (((m_lpbmi->bmiHeader.biWidth * m_lpbmi->bmiHeader.biBitCount + 31) & ~31) >> 3) * m_lpbmi->bmiHeader.biHeight;
// 实验得知一些摄像头不支持指定的分辩率
if (!capSetVideoFormat(m_hWndCap, m_lpbmi, sizeof(BITMAPINFO)))
return false;
}
CVideoCap::~CVideoCap()
{
if (m_bIsConnected)
{
capCaptureAbort(m_hWndCap);
capDriverDisconnect(m_hWndCap);
if (m_lpbmi)
delete m_lpbmi;
if (m_lpDIB)
delete m_lpDIB;
m_bIsConnected = false;
}
capSetCallbackOnError(m_hWndCap, NULL);
capSetCallbackOnFrame(m_hWndCap, NULL);
CloseWindow(m_hWnd);
CloseWindow(m_hWndCap);
CloseHandle(m_hCaptureEvent);
}
/*初始化VFW设备*/
void CMainFrame::OnVfwInitvfw()
{
// TODO: 在此添加命令处理程序代码
DWORD fsize;
// 创建视频窗口
if(!m_wndSource.CreateEx(WS_EX_TOPMOST,NULL,
_T("Source"),WS_OVERLAPPED|WS_CAPTION,
CRect(0,0,352,288),NULL,0))
return;
m_hWndCap = capCreateCaptureWindow(_T("Capture Window"),WS_CHILD|WS_VISIBLE,
0,0,352,288,
m_wndSource.m_hWnd,0);
//m_wndSource.ShowWindow(SW_SHOW);
// 注册回调函数
capSetCallbackOnError(m_hWndCap,(FARPROC)ErrorCallbackProc);
capSetCallbackOnStatus(m_hWndCap,(FARPROC)StatusCallbackProc);
capSetCallbackOnVideoStream(m_hWndCap,(FARPROC)VideoCallbackProc);
// 连接视频设备
capDriverConnect(m_hWndCap,0); //(HWND m_hWndCap, int index);//index : 0--9
// 获取驱动器的性能参数
capDriverGetCaps(m_hWndCap,&m_caps,sizeof(CAPDRIVERCAPS));
if (m_caps.fHasOverlay)
capOverlay(m_hWndCap,TRUE);
// 设置预览速率开始预览
capPreviewRate(m_hWndCap,1000/25);
capPreview(m_hWndCap,bPreview);
fsize = capGetVideoFormatSize(m_hWndCap);
capGetVideoFormat(m_hWndCap, lpbiIn, fsize);
AfxMessageBox(_T("初始化成功！"));
}
// Standard AVIcap window message
// macro: capSetCallbackOnError
BOOL CAviCap::SetErrorCallBack(LPVOID cb)
{
CHECKWIN();
CHECKCNCT();
return capSetCallbackOnError(GetSafeHwnd(), cb);
}
