rtpexternaltransmitter.h

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/*

  This file is a part of JRTPLIB
  Copyright (c) 1999-2011 Jori Liesenborgs

  Contact: jori.liesenborgs@gmail.com

  This library was developed at the Expertise Centre for Digital Media
  (http://www.edm.uhasselt.be), a research center of the Hasselt University
  (http://www.uhasselt.be). The library is based upon work done for 
  my thesis at the School for Knowledge Technology (Belgium/The Netherlands).

  Permission is hereby granted, free of charge, to any person obtaining a
  copy of this software and associated documentation files (the "Software"),
  to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense,
  and/or sell copies of the Software, and to permit persons to whom the
  Software is furnished to do so, subject to the following conditions:

  The above copyright notice and this permission notice shall be included
  in all copies or substantial portions of the Software.

  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  IN THE SOFTWARE.

*/

#ifndef RTPEXTERNALTRANSMITTER_H

#define RTPEXTERNALTRANSMITTER_H

#include "rtpconfig.h"
#include "rtptransmitter.h"
#include <list>

#ifdef RTP_SUPPORT_THREAD
        #include <jthread/jmutex.h>
#endif // RTP_SUPPORT_THREAD

namespace jrtplib
{

class RTPExternalTransmitter;

class RTPExternalSender
{
public:
        RTPExternalSender()                                                                             { }
        virtual ~RTPExternalSender()                                                                    { }

        virtual bool SendRTP(const void *data, size_t len) = 0;

        virtual bool SendRTCP(const void *data, size_t len) = 0;

        virtual bool ComesFromThisSender(const RTPAddress *a) = 0;
};

class RTPExternalPacketInjecter
{
public:
        RTPExternalPacketInjecter(RTPExternalTransmitter *trans)                                        { transmitter = trans; }
        ~RTPExternalPacketInjecter()                                                                    { }

        void InjectRTP(const void *data, size_t len, const RTPAddress &a);

        void InjectRTCP(const void *data, size_t len, const RTPAddress &a);

        void InjectRTPorRTCP(const void *data, size_t len, const RTPAddress &a);
private:
        RTPExternalTransmitter *transmitter;
};

class RTPExternalTransmissionParams : public RTPTransmissionParams
{
public:
        RTPExternalTransmissionParams(RTPExternalSender *s, int headeroverhead):RTPTransmissionParams(RTPTransmitter::ExternalProto)    { sender = s; headersize = headeroverhead; }

        RTPExternalSender *GetSender() const                                                            { return sender; }
        int GetAdditionalHeaderSize() const                                                             { return headersize; }
private:
        RTPExternalSender *sender;
        int headersize;
};

class RTPExternalTransmissionInfo : public RTPTransmissionInfo
{
public:
        RTPExternalTransmissionInfo(RTPExternalPacketInjecter *p) : RTPTransmissionInfo(RTPTransmitter::ExternalProto) { packetinjector = p; }

        RTPExternalPacketInjecter *GetPacketInjector() const                                            { return packetinjector; }
private:
        RTPExternalPacketInjecter *packetinjector;
};
        
class RTPExternalTransmitter : public RTPTransmitter
{
public:
        RTPExternalTransmitter(RTPMemoryManager *mgr);
        ~RTPExternalTransmitter();

        int Init(bool treadsafe);
        int Create(size_t maxpacksize, const RTPTransmissionParams *transparams);
        void Destroy();
        RTPTransmissionInfo *GetTransmissionInfo();
        void DeleteTransmissionInfo(RTPTransmissionInfo *inf);

        int GetLocalHostName(uint8_t *buffer,size_t *bufferlength);
        bool ComesFromThisTransmitter(const RTPAddress *addr);
        size_t GetHeaderOverhead()                                                                      { return headersize; }
        
        int Poll();
        int WaitForIncomingData(const RTPTime &delay,bool *dataavailable = 0);
        int AbortWait();
        
        int SendRTPData(const void *data,size_t len);   
        int SendRTCPData(const void *data,size_t len);

        int AddDestination(const RTPAddress &addr);
        int DeleteDestination(const RTPAddress &addr);
        void ClearDestinations();

        bool SupportsMulticasting();
        int JoinMulticastGroup(const RTPAddress &addr);
        int LeaveMulticastGroup(const RTPAddress &addr);
        void LeaveAllMulticastGroups();

        int SetReceiveMode(RTPTransmitter::ReceiveMode m);
        int AddToIgnoreList(const RTPAddress &addr);
        int DeleteFromIgnoreList(const RTPAddress &addr);
        void ClearIgnoreList();
        int AddToAcceptList(const RTPAddress &addr);
        int DeleteFromAcceptList(const RTPAddress &addr);
        void ClearAcceptList();
        int SetMaximumPacketSize(size_t s);     
        
        bool NewDataAvailable();
        RTPRawPacket *GetNextPacket();
#ifdef RTPDEBUG
        void Dump();
#endif // RTPDEBUG

        void InjectRTP(const void *data, size_t len, const RTPAddress &a);
        void InjectRTCP(const void *data, size_t len, const RTPAddress &a);
        void InjectRTPorRTCP(const void *data, size_t len, const RTPAddress &a);
private:
        void FlushPackets();
        
        bool init;
        bool created;
        bool waitingfordata;
        RTPExternalSender *sender;
        RTPExternalPacketInjecter packetinjector;

        std::list<RTPRawPacket*> rawpacketlist;

        uint8_t *localhostname;
        size_t localhostnamelength;

        size_t maxpacksize;
        int headersize;

        // notification descriptors for AbortWait (0 is for reading, 1 for writing)
#if (defined(WIN32) || defined(_WIN32_WCE))
        SOCKET abortdesc[2];
#else
        int abortdesc[2];
#endif // WIN32
        int CreateAbortDescriptors();
        void DestroyAbortDescriptors();
        void AbortWaitInternal();
#ifdef RTP_SUPPORT_THREAD
        jthread::JMutex mainmutex,waitmutex;
        int threadsafe;
#endif // RTP_SUPPORT_THREAD
};

inline void RTPExternalPacketInjecter::InjectRTP(const void *data, size_t len, const RTPAddress &a)
{
        transmitter->InjectRTP(data, len, a); 
}

inline void RTPExternalPacketInjecter::InjectRTCP(const void *data, size_t len, const RTPAddress &a)
{ 
        transmitter->InjectRTCP(data, len, a); 
}

inline void RTPExternalPacketInjecter::InjectRTPorRTCP(const void *data, size_t len, const RTPAddress &a)
{ 
        transmitter->InjectRTPorRTCP(data, len, a); 
}

} // end namespace

#endif // RTPTCPSOCKETTRANSMITTER_H