Tuner.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 __TUNER_H__
#define __TUNER_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 "mb/interface/IInputEventListener.h"
using namespace ::br::pucrio::telemidia::ginga::core::mb;

#include "mb/interface/CodeMap.h"
using namespace ::br::pucrio::telemidia::ginga::core::mb;

#include "ITuner.h"
#include "providers/Channel.h"
#include "NetworkInterface.h"
#include "ITunerListener.h"
#include "providers/IProviderListener.h"

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

namespace br {
namespace pucrio {
namespace telemidia {
namespace ginga {
namespace core {
namespace tuning {
    class Tuner : public ITuner, public IInputEventListener, public ITProviderListener, public Thread {
        private:
            bool receiving;
            ITunerListener* listener;
            ITunerListener* loopListener;
            map<int, INetworkInterface*> interfaces;
            int currentInterface;
            bool firstTune;
            int skipSize;
            unsigned char packetSize;
            string currentSpec;
            GingaScreenID screenId;

        public:
            Tuner(
                    GingaScreenID screenId,
                    string network = "",
                    string protocol = "",
                    string address = "");

            virtual ~Tuner();

            void setLoopListener(ITunerListener* loopListener);
            bool userEventReceived(IInputEvent* ev);

        private:
            void clearInterfaces();
            void receiveSignal(short signalCode);
            void initializeInterface(string niSpec);
            void initializeInterfaces();
            void createInterface(
                    string network, string protocol, string address);

            bool listenInterface(INetworkInterface* nInterface);
            void receiveInterface(INetworkInterface* nInterface);

        public:
            void setSpec(string ni, string ch);
            void tune();
            INetworkInterface* getCurrentInterface();
            void channelUp();
            void channelDown();
            void changeChannel(int factor);
            bool hasSignal();
            void setSkipSize(int size);
            void setPacketSize(unsigned char size);

        public:
            void setTunerListener(ITunerListener* listener);

        private:
            void notifyData(char* buff, unsigned int val);
            void notifyStatus(short newStatus, IChannel* channel);
            virtual void run();
    };
}
}
}
}
}
}

#endif //__TUNER_H__