miplpcdecoder.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 MIPLPCDECODER_H

#define MIPLPCDECODER_H

#include "mipconfig.h"

#ifdef MIPCONFIG_SUPPORT_LPC

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

class MIPAudioMessage;
class LPCDecoder;

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

        bool init();

        bool destroy();

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        void clearMessages();
        void expire();

        class LPCStateInfo
        {
        public:
                LPCStateInfo();
                ~LPCStateInfo();

                LPCDecoder *getDecoder()                                                { return m_pDecoder; }
                MIPTime getLastUpdateTime() const                                       { return m_lastTime; }
                void setUpdateTime()                                                    { m_lastTime = MIPTime::getCurrentTime(); }
        private:
                MIPTime m_lastTime;
                LPCDecoder *m_pDecoder;
        };

        bool m_init;

#if defined(WIN32) || defined(_WIN32_WCE)
        stdext::hash_map<uint64_t, LPCStateInfo *> m_lpcStates;
#else
        __gnu_cxx::hash_map<uint64_t, LPCStateInfo *, __gnu_cxx::hash<uint32_t> > m_lpcStates;
#endif // Win32
        
        int *m_pFrameBuffer;
        std::list<MIPAudioMessage *> m_messages;
        std::list<MIPAudioMessage *>::const_iterator m_msgIt;
        int64_t m_lastIteration;
        MIPTime m_lastExpireTime;
};      

#endif // MIPCONFIG_SUPPORT_LPC

#endif // MIPLPCDECODER_H