ROHC compression/decompression library: rtp.h Source File

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00001 /*
00002  * Copyright 2007,2008 CNES
00003  * Copyright 2011,2012,2013 Didier Barvaux
00004  * Copyright 2007,2008 Thales Alenia Space
00005  * Copyright 2007,2010 Viveris Technologies
00006  *
00007  * This library is free software; you can redistribute it and/or
00008  * modify it under the terms of the GNU Lesser General Public
00009  * License as published by the Free Software Foundation; either
00010  * version 2.1 of the License, or (at your option) any later version.
00011  *
00012  * This library is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00015  * Lesser General Public License for more details.
00016  *
00017  * You should have received a copy of the GNU Lesser General Public
00018  * License along with this library; if not, write to the Free Software
00019  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
00020  */
00021 
00022 /**
00023  * @file rtp.h
00024  * @brief RTP header
00025  * @author David Moreau from TAS
00026  * @author Didier Barvaux <didier@barvaux.org>
00027  *
00028  * See section 5.1 of RFC 1889 for details.
00029  */
00030 
00031 #ifndef ROHC_PROTOCOLS_RTP_H
00032 #define ROHC_PROTOCOLS_RTP_H
00033 
00034 #include <stdint.h>
00035 
00036 #ifdef __KERNEL__
00037 #       include <endian.h>
00038 #else
00039 #       include "config.h" /* for WORDS_BIGENDIAN */
00040 #endif
00041 
00042 
00043 /**
00044  * @brief The RTP header
00045  *
00046  * See section 5.1 of RFC 1889 for details.
00047  */
00048 struct rtphdr
00049 {
00050 #if WORDS_BIGENDIAN == 1
00051         uint16_t version:2;
00052         uint16_t padding:1;
00053         uint16_t extension:1;
00054         uint16_t cc:4;
00055         uint16_t m:1;
00056         uint16_t pt:7;
00057 #else
00058         uint16_t cc:4;          ///< CSRC Count
00059         uint16_t extension:1;   ///< Extension bit
00060         uint16_t padding:1;     ///< Padding bit
00061         uint16_t version:2;     ///< RTP version
00062         uint16_t pt:7;          ///< Payload Type
00063         uint16_t m:1;           ///< Marker
00064 #endif
00065         uint16_t sn;            ///< Sequence Number
00066         uint32_t timestamp;     ///< Timestamp
00067         uint32_t ssrc;          ///< Synchronization SouRCe (SSRC) identifier
00068 } __attribute__((packed));
00069 
00070 
00071 #endif
00072