//
//  ctranscoder.h
//  xlxd
//
//  Created by Jean-Luc Deltombe (LX3JL) on 13/04/2017.
//  Copyright © 2015 Jean-Luc Deltombe (LX3JL). All rights reserved.
//
// ----------------------------------------------------------------------------
//    This file is part of xlxd.
//
//    xlxd is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    xlxd 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 for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
// ----------------------------------------------------------------------------

#ifndef ctranscoder_h
#define ctranscoder_h

#include "csemaphore.h"
#include "ccodecstream.h"
#include "cudpsocket.h"

////////////////////////////////////////////////////////////////////////////////////////
// define


////////////////////////////////////////////////////////////////////////////////////////
// class

class CPacketStream;

class CTranscoder
{
public:
    // constructor
    CTranscoder();
    
    // destructor
    virtual ~CTranscoder();

    // initialization
    bool Init(void);
    void Close(void);

    // locks
    void Lock(void)                     { m_Mutex.lock(); }
    void Unlock(void)                   { m_Mutex.unlock(); }
    
    // manage streams
    CCodecStream *GetStream(CPacketStream *, uint8);
    void ReleaseStream(CCodecStream *);
    
    // task
    static void Thread(CTranscoder *);
    void Task(void);

protected:
    // keepalive helpers
    void HandleKeepalives(void);

    // packet decoding helpers
    bool IsValidKeepAlivePacket(const CBuffer &);
    bool IsValidStreamDescrPacket(const CBuffer &, uint16 *, uint16 *);
    bool IsValidNoStreamAvailablePacket(const CBuffer&);

    // packet encoding helpers
    void EncodeKeepAlivePacket(CBuffer *);
    void EncodeOpenstreamPacket(CBuffer *, uint8, uint8);
    void EncodeClosestreamPacket(CBuffer *, uint16);
    
protected:
    // streams
    std::mutex                  m_Mutex;
    std::vector<CCodecStream *> m_Streams;

    // sync objects for Openstream
    CSemaphore      m_SemaphoreOpenStream;
    bool            m_bStreamOpened;
    uint16          m_StreamidOpenStream;
    uint16          m_PortOpenStream;
    
    // thread
    bool            m_bStopThread;
    std::thread     *m_pThread;

    // socket
    CIp             m_Ip;
    CUdpSocket      m_Socket;
    bool            m_bConnected;

    // time
    CTimePoint      m_LastKeepaliveTime;
    CTimePoint      m_LastActivityTime;
};


////////////////////////////////////////////////////////////////////////////////////////
#endif /* ctranscoder_h */