roiTracker.h

/* Copyright (c) 2009       Maxim Makhinya
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License version 2.1 as published
 * by the Free Software Foundation.
 *  
 * This library is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 * details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef EQ_ROI_TRACKER_H
#define EQ_ROI_TRACKER_H

#include <eq/client/pixelViewport.h>
#include <eq/client/types.h>
#include <eq/base/stdExt.h>

#include <vector>
#include <string>


namespace eq
{
    class EQ_EXPORT ROITracker
    {
    public:
        ROITracker();
        virtual ~ROITracker();

        bool useROIFinder( const PixelViewport&   pvp,
                            const uint32_t        stage,
                            const uint32_t        frameID,
                                  uint8_t*&       ticket );

        void updateDelay( const PixelViewportVector& pvps,
                          const uint8_t*             ticket );

    protected:

    private:
        struct Area
        {
            Area( const PixelViewport& pvp_,
                        uint32_t       lastSkip_ = 0,
                        uint32_t       skip_     = 0 );

            PixelViewport pvp;
            uint32_t      lastSkip; 
            uint32_t      skip;     
        };
        struct Stage
        {
            std::vector< Area > areas;
        };
        stde::hash_map< uint32_t, Stage >* _curFrame;

        stde::hash_map< uint32_t, Stage >* _prvFrame;

        uint8_t* _ticket; 
        bool     _needsUpdate; 
        uint32_t _lastFrameID; 
        uint32_t _lastStage;   

        bool _returnPositive( uint8_t*& ticket );
    };
}

#endif //EQ_ROI_TRACKER_H