Stc.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 STC_H_
#define STC_H_

#define SYSTEM_CLOCK_FREQUENCY 27000000
#define SYSTEM_CLOCK_FREQUENCY_90 90000

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

#include <stdint.h>
#include <iostream>
using namespace std;

namespace br {
namespace pucrio {
namespace telemidia {
namespace ginga {
namespace core {
namespace system {
namespace time {
    class Stc {
        protected:
            uint64_t stc;
            struct timeval clockRef;

            uint64_t reference;

            virtual void refreshStcSample();

        public:
            Stc();
            virtual ~Stc();

            static int timevalSubtract(
                    struct timeval *result,
                    struct timeval *x,
                    struct timeval *y);

            static uint64_t baseExtToStc(uint64_t base, uint64_t ext);
            static uint64_t stcToBase(uint64_t stc);
            static uint64_t stcToExt(uint64_t stc);
            static double stcToSecond(uint64_t stc);
            static double baseToSecond(uint64_t base);
            static uint64_t secondToStc(double seconds);
            static uint64_t secondToBase(double seconds);

            uint64_t getReference();
            void setReference(uint64_t pcr);
            void setReference(uint64_t base, uint64_t ext);
            uint64_t getStc();
            uint64_t getStcBase();
            uint64_t getStcExt();
            double getBaseToSecond();
    };
}
}
}
}
}
}
}

#endif /* STC_H_ */