rtppacket.h

Go to the documentation of this file.

// ##########################################################################
// ####                                                                  ####
// ####                      RTP Audio Server Project                    ####
// ####                    ============================                  ####
// ####                                                                  ####
// #### RTP Packet                                                       ####
// ####                                                                  ####
// ####           Copyright (C) 1999-2012 by Thomas Dreibholz            ####
// ####                                                                  ####
// #### Contact:                                                         ####
// ####    EMail: dreibh@iem.uni-due.de                                  ####
// ####    WWW:   https://www.nntb.no/~dreibh/rtpaudio                ####
// ####                                                                  ####
// #### ---------------------------------------------------------------- ####
// ####                                                                  ####
// #### This program 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.              ####
// ####                                                                  ####
// #### 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 for more details.                     ####
// ####                                                                  ####
// #### You should have received a copy of the GNU General Public        ####
// #### License along with this program.  If not, see                    ####
// #### <http://www.gnu.org/licenses/>.                                  ####
// ####                                                                  ####
// ##########################################################################
// $Id: rtppacket.h 1314 2011-12-23 11:07:45Z dreibh $


#ifndef RTPPACKET_H
#define RTPPACKET_H


#include "tdsystem.h"
#include "tdsocket.h"


namespace RTPConstants {


const cardinal RTPMaxPayloadLimit = 8192;

const cardinal RTPDefaultMaxPayload = 1376;

const cardinal RTPDefaultHeaderSize = 12;

const card8 RTPVersion = 2;

const double RTPMicroSecondsPerTimeStamp = 1000.0 / 16.0;


#ifdef USE_TRANSPORTINFO

const cardinal RTPMaxQualityLayers = 4;

#else

const cardinal RTPMaxQualityLayers = 16;

#endif


}


struct RTPPacket
{
   // ====== Constructor ====================================================
   public:
   RTPPacket();


   // ====== Get methods ====================================================
   inline card8 getVersion() const;

   inline card8 getPadding() const;

   inline card8 getExtension() const;

   inline card8 getCSRCCount() const;

   inline bool getMarker() const;

   inline card8 getPayloadType() const;

   inline card16 getSequenceNumber() const;

   inline card32 getTimeStamp() const;

   inline card32 getSSRC() const;

   inline card32 getCSRC(cardinal index) const;


   inline cardinal calculateHeaderSize() const;

   inline char* getPayloadData() const;

   inline cardinal getMaxPayloadSize() const;


   // ====== Set methods ====================================================
   inline void setVersion(const card8 version);

   inline void setPadding(const card8 padding);

   inline void setExtension(const card8 extension);

   inline void setCSRCCount(const card8 count);

   inline void setMarker(const bool marker);

   inline void setPayloadType(const card8 payloadType);

   inline void setSequenceNumber(const card16 sequenceNumber);

   inline void setTimeStamp(const card32 timeStamp);

   inline void setSSRC(const card32 ssrc);

   inline void setCSRC(const cardinal index, const card32 csrc);


   friend std::ostream& operator<<(std::ostream& os, const RTPPacket& packet);


   // ====== Private data ===================================================
   private:
#if BYTE_ORDER == BIG_ENDIAN
   card8 V:2;                       // Version
   card8 P:1;                       // Padding
   card8 X:1;                       // Extension
   card8 CC:4;                      // CSRC Count
   card8 M:1;                       // Marker
   card8 PT:7;                      // Payload Type
#elif  BYTE_ORDER == LITTLE_ENDIAN
   card8 CC:4;                      // CSRC Count
   card8 X:1;                       // Extension
   card8 P:1;                       // Padding
   card8 V:2;                       // Version
   card8 PT:7;                      // Payload Type
   card8 M:1;                       // Marker
#else
#error "Unknown BYTE_ORDER setting!"
#endif
   card16 SequenceNumber;           // Sequence number
   card32 TimeStamp;                // TimeStamp
   card32 SSRC;                     // Synchronization Source (SSRC) identifier
   card32 CSRC[16];                 // Contributing Source (CSRC) identifiers
   char   Data[RTPConstants::RTPMaxPayloadLimit];   // Payload data
} __attribute__((packed));


#include "rtppacket.icc"


#endif