/*
 * Copyright 2000-2008 Ingo Weinhold <ingo_weinhold@gmx.de> All rights reserved.
 * Distributed under the terms of the MIT license.
 */

/*!	Derived classes are video consumer targets. Each time the consumer
	has received a frame (that is not late and thus dropped) it calls
	SetBitmap(). This method should immediately do whatever has to be done.
	Until the next call to SetBitmap() the bitmap can be used -- thereafter
	it is not allowed to use it any longer. Therefore the bitmap variable
	is protected by a lock. Anytime it is going to be accessed, the object
	must be locked.
*/
#ifndef VIDEO_TARGET_H
#define VIDEO_TARGET_H


#include <Locker.h>


class BBitmap;


class VideoTarget {
 public:
								VideoTarget();
	virtual						~VideoTarget();

			bool				LockBitmap();
			void				UnlockBitmap();

	virtual	void				SetBitmap(const BBitmap* bitmap);
			const BBitmap*		GetBitmap() const;

 protected:
			BLocker				fBitmapLock;
			const BBitmap* volatile	fBitmap;
};

#endif	// VIDEO_TARGET_H