NPTProcessor.h

/******************************************************************************
Este arquivo eh parte da implementacao do ambiente declarativo do middleware
Ginga (Ginga-NCL).

Direitos Autorais Reservados (c) 1989-2007 PUC-Rio/Laboratorio TeleMidia

Este programa eh software livre; voce pode redistribui-lo e/ou modificah-lo sob
os termos da Licenca Publica Geral GNU versao 2 conforme publicada pela Free
Software Foundation.

Este programa eh distribuido na expectativa de que seja util, porem, SEM
NENHUMA GARANTIA; nem mesmo a garantia implicita de COMERCIABILIDADE OU
ADEQUACAO A UMA FINALIDADE ESPECIFICA. Consulte a Licenca Publica Geral do
GNU versao 2 para mais detalhes.

Voce deve ter recebido uma copia da Licenca Publica Geral do GNU versao 2 junto
com este programa; se nao, escreva para a Free Software Foundation, Inc., no
endereco 59 Temple Street, Suite 330, Boston, MA 02111-1307 USA.

Para maiores informacoes:
ncl @ telemidia.puc-rio.br
http://www.ncl.org.br
http://www.ginga.org.br
http://www.telemidia.puc-rio.br
******************************************************************************
This file is part of the declarative environment of middleware Ginga (Ginga-NCL)

Copyright: 1989-2007 PUC-RIO/LABORATORIO TELEMIDIA, All Rights Reserved.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License version 2 as published by
the Free Software Foundation.

This program 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 General Public License version 2 for more
details.

You should have received a copy of the GNU General Public License version 2
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA

For further information contact:
ncl @ telemidia.puc-rio.br
http://www.ncl.org.br
http://www.ginga.org.br
http://www.telemidia.puc-rio.br
*******************************************************************************/

#ifndef NPTPROCESSOR_H_
#define NPTPROCESSOR_H_

#include "system/thread/Thread.h"
using namespace br::pucrio::telemidia::ginga::core::system::thread;

#include "system/compat/SystemCompat.h"
using namespace ::br::pucrio::telemidia::ginga::core::system::compat;

#include "system/time/ITimeBaseProvider.h"
using namespace br::pucrio::telemidia::ginga::core::system::time;

#include "tuner/providers/ISTCProvider.h"
using namespace br::pucrio::telemidia::ginga::core::tuning;

#include "DSMCCSectionPayload.h"
#include "MpegDescriptor.h"
#include "NPTReference.h"
#include "TimeBaseClock.h"

#include <set>
#include <map>
#include <iostream>
#include <string>
#include <cmath>
using namespace std;

namespace br {
namespace pucrio {
namespace telemidia {
namespace ginga {
namespace core {
namespace dataprocessing {
namespace dsmcc {
namespace npt {

class NPTProcessor : public Thread, public ITimeBaseProvider {
    
    struct TimeControl {
        double time;
        bool notified;
    };

    private:
        static const unsigned short MAX_NPT_VALUE       = 47721;
        static const char INVALID_CID          = -1;
        static const short NPT_ST_OCCURRING    = 0;
        static const short NPT_ST_PAUSED       = 1;

        ISTCProvider* stcProvider;
        bool running;
        bool loopControlMin;
        bool loopControlMax;
        unsigned char currentCid;
        unsigned char occurringTimeBaseId;

        pthread_mutex_t loopMutex;
        pthread_mutex_t schedMutex;
        pthread_mutex_t lifeMutex;

        map<unsigned char, NPTReference*> scheduledNpts;
        map<unsigned char, TimeBaseClock*> timeBaseClock;
        map<unsigned char, Stc*> timeBaseLife;
        map<unsigned char, set<ITimeBaseProvider*>*> loopListeners;
        map<unsigned char, map<TimeControl*, set<ITimeBaseProvider*>*>*> timeListeners;
        set<ITimeBaseProvider*> cidListeners;
        bool reScheduleIt;
        uint64_t firstStc;
        bool isFirstStc;
        bool nptPrinter;
        map<char,NPTReference*> lastNptList;

    public:
        NPTProcessor(ISTCProvider* stcProvider);
        virtual ~NPTProcessor();

        void setNptPrinter(bool nptPrinter);

    private:
        uint64_t getSTCValue();
        void clearUnusedTimebase();
        void clearTables();
        void detectLoop();

    public:
        bool addLoopListener(unsigned char cid, ITimeBaseListener* ltn);
        bool removeLoopListener(unsigned char cid, ITimeBaseListener* ltn);

        bool addTimeListener(
                unsigned char cid, double nptValue, ITimeBaseListener* ltn);

        bool removeTimeListener(unsigned char cid, ITimeBaseListener* ltn);

        bool addIdListener(ITimeBaseListener* ltn);
        bool removeIdListener(ITimeBaseListener* ltn);

        unsigned char getOccurringTimeBaseId();

    private:
        unsigned char getCurrentTimeBaseId();
        void notifyLoopToTimeListeners();
        void notifyTimeListeners(unsigned char cid, double nptValue);
        void notifyNaturalEndListeners(unsigned char cid, double nptValue);
        void notifyIdListeners(unsigned char oldCid, unsigned char newCid);
        TimeBaseClock* getTimeBaseClock(unsigned char cid);
        int updateTimeBase(TimeBaseClock* clk, NPTReference* npt);
        TimeBaseClock* getCurrentTimebase();
        double getCurrentTimeValue(unsigned char timeBaseId);

    public:
        int decodeDescriptors(vector<MpegDescriptor*>* list);
        double getNPTValue(unsigned char contentId);

    private:
        char getNextNptValue(char cid, double *nextNptValue, double* sleepTime);

        bool processNptValues();
        void run();
};

}
}
}
}
}
}
}
}

#endif /* NPTPROCESSOR_H_ */