Camera switching problem

[slinx]

In my application, I uses camera switching ( between front and back camera ). My sample code pseudo-code is like

void SwitchCamera()
	{
	iCam->ReleaseCam();		// calls PowerOff() and Release() of CCamera
	iCam->AlterCamera();	// here construct CCamera changing camera index from current selection	
	iCam->ReserveCam();		// calls Reserve() of CCamera
	}

	
void ReserveComplete( TInt aError )			// From MCameraObserver 
{
	// I got (-14) KErrInUse here 
}

So Is there any other necessary step to follow in SwitchCamera() method? Thanks

[symbianyucca]

its likely that the releasing takes time, so, you should wait that it is free before trying to reserve it again.

[slinx]

its likely that the releasing takes time, so, you should wait that it is free before trying to reserve it again.

thanks symbianyucca for replying. yes I have checked that possiblity and uses timer to wait sometime after calling iCam->ReleaseCam(). But seems no effect on waiting before calling AlterCamera(), as getting same (-14, KErrInUse) error.

[TongMuan]

thanks symbianyucca for replying. yes I have checked that possiblity and uses timer to wait sometime after calling iCam->ReleaseCam(). But seems no effect on waiting before calling AlterCamera(), as getting same (-14, KErrInUse) error.

Hi,

You are using a proper asynchronous active object timer with a callback, right? User::After or similar is probably not good enough, because it might be that some camera related communication or active object completions need to happen in the UI thread before the previously used camera is really released and the other one can be reserved.

[slinx]

Hi,

You are using a proper asynchronous active object timer with a callback, right? User::After or similar is probably not good enough, because it might be that some camera related communication or active object completions need to happen in the UI thread before the previously used camera is really released and the other one can be reserved.

Thanks for your reply. The problem is already solved . Actually previous camera was using by some other resource and I was forgotten that part which causes the problem.