Camera Detection

programming flash
1

I built an FLAR and PV3D app and it is working well except I want to detect the state of the users camera. I either want to know if the camera is off or in use by a different program, or if they don’t have a camera installed. My attempts have been marginally successful, but don’t always work as expected, and don’t work at all if no camera driver is present at all.

See: http://www.danielbrian.com/christmas and http://www.danielbrian.com/christmas/test

How can I detect the aforementioned camera states?

This is what I have:



 private function cameraCheck():void
{
trace("***:", Camera.getCamera(), Camera.names.length);
	if (Camera.getCamera() == null || Camera.names.length == 0)
	{
		camName = "PV3D";
		doTrackLoaded();
		return;
	}
			
	var checkCam:Camera = Camera.getCamera();
	var repeat:uint = 20;
	camTimer = new Timer(50, repeat);
	var vid:Video = new Video();
	var camCount:Number = new Number();
			
	vid.visible = false;
	vid.attachCamera(checkCam);
	addChild(vid);
			
	//checkCam.addEventListener(StatusEvent.STATUS, statusEventHandler);
			
	camTimer.addEventListener(TimerEvent.TIMER, timerCheck);
	camTimer.addEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);
	camTimer.start();
			
	function statusEventHandler(se:StatusEvent):void
	{
		trace(se.code);
		switch (se.code) {
			case "Camera.Muted":
				trace("User denied access to camera.");
				break;
			case "Camera.Unmuted":
				trace("User allowed access to camera.");
				/* checkCam.removeEventListener(StatusEvent.STATUS, statusEventHandler);
						camTimer.removeEventListener(TimerEvent.TIMER, timerCheck);
						camTimer.removeEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);
				camTimer.stop(); */
						
				camName = "FLAR";
				doTrackLoaded();
				break;
                }
		}
			
	function timerCheck(te:TimerEvent):void
	{
		camCount += checkCam.currentFPS;
			
		// checks if the security panel is open
		closed = true;
		var dummy:BitmapData;
		dummy = new BitmapData(1, 1);
				
		try
		{
			// Try to capture the stage: triggers a Security error when the settings dialog box is open
			dummy.draw(stage);
		}
		catch (error:Error)
		{
			closed = false;
			camTimer.repeatCount ++;
			trace(camTimer.repeatCount);
		}
				
		trace("security panel open: " + closed);
		dummy.dispose();
		dummy = null;
	}
		
	function timerComplete(te:TimerEvent):void
	{
		var camActive:Number = camCount / repeat;
				
		if (camActive > 0)
		{
			cam = FLARcam;
			camName = "FLAR";
		}
		else
		{
			cam = PV3Dcam;
			camName = "PV3D";
			addCameraOffMessage();
		}
				
		camTimer.removeEventListener(TimerEvent.TIMER, timerCheck);
				camTimer.removeEventListener(TimerEvent.TIMER_COMPLETE, timerComplete);
		removeChild(vid);
		checkCam = null;
				
		cameraCheckComplete = true;
	}
}