mipvideoframestorage.h

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/*
    
  This file is a part of EMIPLIB, the EDM Media over IP Library.
  
  Copyright (C) 2006-2011  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  This library is free software; you can redistribute it and/or
  modify it under the terms of the GNU Lesser General Public
  License as published by the Free Software Foundation; either
  version 2.1 of the License, or (at your option) any later version.

  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 St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef MIPVIDEOFRAMESTORAGE_H

#define MIPVIDEOFRAMESTORAGE_H

#include "mipconfig.h"
#include "mipcomponent.h"
#include "miptime.h"
#include <list>
#include <map>

class EMIPLIB_IMPORTEXPORT MIPVideoFrameStorage : public MIPComponent
{
public:
        MIPVideoFrameStorage();
        ~MIPVideoFrameStorage();

        bool init();

        bool destroy();
        
        bool getData(uint64_t sourceID, uint8_t *pDest, int *width, int *height, MIPTime *t = 0);

        bool getSourceIDs(std::list<uint64_t> &sourceIDs);

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        class VideoFrameInfo
        {
        public:
                VideoFrameInfo(uint8_t *pData, int width, int height, size_t length)                    { m_pData = pData; m_length = length; m_width = width; m_height = height; m_time = MIPTime::getCurrentTime(); }
                ~VideoFrameInfo()                                                                       { delete [] m_pData; }
                const uint8_t *getData() const                                                          { return m_pData; }
                int getWidth() const                                                                    { return m_width; }
                int getHeight() const                                                                   { return m_height; }
                size_t getDataLength() const                                                            { return m_length; }
                MIPTime getCreationTime() const                                                         { return m_time; }
        private:
                uint8_t *m_pData;
                int m_width, m_height;
                size_t m_length;
                
                MIPTime m_time;
        };

        void expire();
        
        bool m_init;
        MIPTime m_lastExpireTime;
        std::map<uint64_t, VideoFrameInfo *> m_frames;
};

#endif // MIPVIDEOFRAMESTORAGE_H