//
// Copyright (C) 2008 Andras Varga
// Copyright (C) 2001 Matthias Oppitz
//
// 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 2
// 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, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//

cplusplus {{
#include "inet/common/INETDefs.h"
}}

namespace inet::rtp;

enum RTPPacketEnums
{
    RTPPACKET_FIX_HEADERLENGTH = 12;
}

//
// This class represents an RTP data packet. Real data can either
// be encapsulated, or simulated by adding length.
//
// The following RTP header fields exist but aren't used:
// padding, extension, csrcCount. The csrcList can't be used
// because csrcCount is always 0.
//
packet RTPPacket
{
    @customize(true);  // see the generated C++ header for more info

    byteLength = RTPPACKET_FIX_HEADERLENGTH;  // 12-byte fixed header

    // The rtp version of this ~RTPPacket.
    uint8 version = 2;

    // Set to 1 if padding is used in this ~RTPPacket, 0 otherwise.
    // This implementation doesn't use padding bytes, so it is always 0.
    bool padding = false;

    // Set to 1, if this ~RTPPacket contains an rtp header extension, 0 otherwise.
    // This implementation doesn't support rtp header extensions, so it is always 0.
    bool extension = false;

    // The marker.
    bool marker = false;

    // The type of payload carried in this ~RTPPacket.
    int8 payloadType;

    // The sequence number of this ~RTPPacket.
    uint16 sequenceNumber;

    // The rtp time stamp of this ~RTPPacket.
    uint32 timeStamp;

    // The ssrc identifier of the creator of this ~RTPPacket.
    uint32 ssrc;

    // no mixers, no contributing sources
    uint32 csrc[];

    abstract int headerLength;

    abstract int payloadLength;
};
