void CWinVideoGrabber::StartRecording(char *filename)
{
if (!inited) return;
StopRecording();
//StopPreviewing();
CAPTUREPARMS CaptureParms;
capCaptureGetSetup(videowindow, &CaptureParms, sizeof(CAPTUREPARMS));
CaptureParms.fYield = True;
CaptureParms.fAbortLeftMouse = False;
CaptureParms.fAbortRightMouse = False;
capCaptureSetSetup(videowindow, &CaptureParms, sizeof (CAPTUREPARMS));
capFileSetCaptureFile(videowindow, filename);
capCaptureSequence(videowindow);
videomode = VIDEOGRABBERMODE_RECORDING;
}
DWORD WINAPI ListeningRoutine(LPVOID lpParam)
{
const int SAMPLING_FRAME_RATE = 1; // per second
BOOL isCapturing = FALSE;
VideoGrabber* videoGrabber = (VideoGrabber*)lpParam;
static PTSTR captureFileName;
while (videoGrabber->IsEnabled())
{
videoGrabber->GrabFrame(isCapturing);
int recode;
if (videoGrabber->mMotionDetectedDuringLastSecond)
{
if (!isCapturing)
{
captureFileName = videoGrabber->GetNewDataFileName();
MakeSureDirectoryPathExists(captureFileName);
recode = capFileSetCaptureFile(videoGrabber->camhwnd, captureFileName);
recode = capCaptureSequence(videoGrabber->camhwnd);
isCapturing = TRUE;
}
}
else if (isCapturing)
{
// ISSUE: Sometimes motion detected when there is no motion in the scene actually.
// This is caused by automatic aperture enabled in webcam: the cam adjusting
// its aperture to avoid under/overexposition. Hence brightness of pixels is
// changed and motion detection mechanism makes false alarm. However this can
// be patched because the effect causes capture of 2-3 sec. video stream. So
// quick and dirty solution would be to filter all streams shorter than 4 sec.
recode = capCaptureStop(videoGrabber->camhwnd);
recode = GetLastError();
videoGrabber->GetDataAccumulator()->LogVideo(captureFileName);
isCapturing = FALSE;
}
Sleep(1000/SAMPLING_FRAME_RATE);
}
return FALSE;
}
BOOL CWebCam::StartRecord(const char* filename)
{
capFileSetCaptureFile(m_hCam, filename);
return capCaptureSequence(m_hCam);
}
