MpegDescriptor.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 MPEGDESCRIPTOR_H_
#define MPEGDESCRIPTOR_H_

#include <string.h>
#include <iostream>
#include <vector>
using namespace std;

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

class MpegDescriptor {
    public:
        static const unsigned short MAX_DESCRIPTOR_SIZE = 257;

    private:

    protected:
        unsigned char descriptorTag;
        unsigned char descriptorLength;
        char* stream;

        unsigned short currentSize;

        virtual int process();
        virtual int updateStream();

        virtual unsigned int calculateDescriptorSize();

    public:
        MpegDescriptor();
        MpegDescriptor(unsigned char tag);
        virtual ~MpegDescriptor();

        char addData(char* data, unsigned short length);
        unsigned char isConsolidated();

        unsigned char getDescriptorTag();
        unsigned char getDescriptorLength();

        int getStreamSize();
        int getStream(char** dataStream);

        void setDescriptorTag(unsigned char tag);

        static MpegDescriptor* getDescriptor(
                vector<MpegDescriptor*>* descriptors, unsigned char Tag);

        static vector<MpegDescriptor*>* getDescriptors(
                vector<MpegDescriptor*>* descriptors, unsigned char Tag);

        static int getDescriptorsLength(vector<MpegDescriptor*>* descriptors);
};

}
}
}
}
}
}
}
}

#endif /*MPEGDESCRIPTOR_H_*/