🚀 go-pugleaf

Hi Jon,

'busy' is unused throughout the rest of the application during execution. When
the user closes the main window, I set 'terminated' to true and wait until
'!grabbing'  Sorry for the confusion. I appended the total thread loop below.
'busy' is unused. Again, included for future use, not implemented in any other
part of the program.


'grab()' calls my camera supplier's video GrabSingleFrame() call which I have
been assured but cannot validate is thread-safe.


'process()' does nothing unless check marks are set in additional GUI window. No
functions are called from this routine as no checkmarks are checked.
ex. if (VideoForm->BlurImage->Checked) BlurVideoImage();


'display()' calls SendDIBitsToDevice()



Really, these threads should run independent of each other (I hope). The parent
thread (Main Application Thread embedded in Borland's TApplication?) listens for
Windows' events (WM_MOUSEMOVE, WM_CLOSE, etc.) and the child thread
Grab-And-Display video images. I guess I have no guarantee that the actual call
to the camera hardware to fill by bit-bucket (uchar buffer) is not causing the
problem. :(

Thanks,

Rob

___________________________________________________________________________


// background thread for live video display and processing
void VideoClass::LiveVideoGrabbingThread()
{
	// set semiphores
	terminated = false;
	busy       = false;
	grabbing   = true;

	// log event
	Global_UpdateStatusPrivate(String("entering ") + __FUNC__ + "()...");

	// grab, process, display live video as normal
	while (!terminated)
	{
		// give primary thread time to process frozen image
		if (frozen)
			Sleep(100);
	
		// grab, process, and display video data
		else
		{
			// set semiphore
			busy = true;

			// grab video frame from camera
			Grab();

			// process image data
			Process();

			// display current image on screen
			Display();

			// clear semiphore
			busy = false;

			// preserve process time
			Sleep(FrameRateTimeOut);
		}
	}
}

// log event
Global_UpdateStatusPrivate(String("exiting ") + __FUNC__ + "()...");

	// clear semiphore allowing main process to continue
	grabbing = false;
}
//---------------------------------------------------------------------------