mipavcodecframeconverter.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 MIPAVCODECFRAMECONVERTER_H

#define MIPAVCODECFRAMECONVERTER_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_AVCODEC

#include "mipcomponent.h"
#include "miptime.h"
#if defined(WIN32) || defined(_WIN32_WCE)
        #include <hash_map>
#else
        #include <ext/hash_map>
#endif // Win32

#ifdef MIPCONFIG_SUPPORT_AVCODEC_OLD
        #include <ffmpeg/avcodec.h>     
        #include <ffmpeg/avutil.h>      
#else
        extern "C" 
        {       
                #include <libavcodec/avcodec.h>
                #include <libswscale/swscale.h>
        }
#endif // MIPCONFIG_SUPPORT_AVCODEC_OLD

#include <list>

class MIPVideoMessage;

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

        bool init(int targetWidth, int targetHeight, uint32_t targetSubtype);

        bool destroy();

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);

        static void initAVCodec();
private:
        void clearMessages();
        void expire();
        void clearCache();

        bool m_init;
        std::list<MIPVideoMessage *> m_messages;
        std::list<MIPVideoMessage *>::const_iterator m_msgIt;
        int64_t m_lastIteration;

        int m_targetWidth;
        int m_targetHeight;
        uint32_t m_targetSubtype;
        PixelFormat m_targetPixFmt;

#ifdef MIPCONFIG_SUPPORT_AVCODEC_OLD
        void *m_pTargetAVFrame;
        void *m_pSrcAVFrame;
#else 
        class ConvertCache 
        {
        public:
                ConvertCache(int srcWidth, int srcHeight, uint32_t srcSubtype, SwsContext *pSwsContext)
                {
                        m_srcWidth = srcWidth;
                        m_srcHeight = srcHeight;
                        m_srcSubtype = srcSubtype;
                        m_pSwsContext = pSwsContext;
                        m_lastTime = MIPTime::getCurrentTime();
                }

                ~ConvertCache()
                {
                        sws_freeContext(m_pSwsContext);
                }

                int getSourceWidth() const                                              { return m_srcWidth; }
                int getSourceHeight() const                                             { return m_srcHeight; }
                uint32_t getSourceSubtype() const                                       { return m_srcSubtype; }
                SwsContext *getSwsContext()                                             { return m_pSwsContext; }

                MIPTime getLastUpdateTime() const                                       { return m_lastTime; }
                void setLastUpdateTime(MIPTime t)                                       { m_lastTime = t; }
        private:
                SwsContext *m_pSwsContext;
                int m_srcWidth;
                int m_srcHeight;
                uint32_t m_srcSubtype;
                MIPTime m_lastTime;
        };
#if defined(WIN32) || defined(_WIN32_WCE)
        stdext::hash_map<uint64_t, ConvertCache *> m_convertCache;
#else
        __gnu_cxx::hash_map<uint64_t, ConvertCache *, __gnu_cxx::hash<uint32_t> > m_convertCache;
#endif // Win32
        MIPTime m_lastExpireTime;
#endif // MIPCONFIG_SUPPORT_AVCODEC_OLD
};

#endif // MIPCONFIG_SUPPORT_AVCODEC

#endif // MIPAVCODECFRAMECONVERTER_H