ROHC compression/decompression library: rtp.h Source File

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 2 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * This program is distributed in the hope that it will be useful,
00008  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00009  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00010  * GNU General Public License for more details.
00011  *
00012  * You should have received a copy of the GNU General Public License
00013  * along with this program; if not, write to the Free Software
00014  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00015  */
00016 
00017 /**
00018  * @file rtp.h
00019  * @brief RTP header
00020  * @author David Moreau from TAS
00021  *
00022  * See section 5.1 of RFC 1889 for details.
00023  */
00024 
00025 #ifndef RTP_H
00026 #define RTP_H
00027 
00028 #include <sys/types.h>
00029 
00030 
00031 /**
00032  * @brief RTP header
00033  *
00034  * See section 5.1 of RFC 1889 for details.
00035  */
00036 struct rtphdr
00037 {
00038 #if __BYTE_ORDER == __LITTLE_ENDIAN
00039         u_int16_t cc:4;          ///< CSRC Count
00040         u_int16_t extension:1;   ///< Extension bit
00041         u_int16_t padding:1;     ///< Padding bit
00042         u_int16_t version:2;     ///< RTP version
00043         u_int16_t pt:7;          ///< Payload Type
00044         u_int16_t m:1;           ///< Marker
00045 #elif __BYTE_ORDER == __BIG_ENDIAN
00046         u_int16_t version:2;
00047         u_int16_t padding:1;
00048         u_int16_t extension:1;
00049         u_int16_t cc:4;
00050         u_int16_t m:1;
00051         u_int16_t pt:7;
00052 #else
00053 #       error "Adjust your <bits/endian.h> defines"
00054 #endif
00055         u_int16_t sn;            ///< Sequence Number
00056         u_int32_t timestamp;     ///< Timestamp
00057         u_int32_t ssrc;          ///< Synchronization SouRCe (SSRC) identifier
00058 } __attribute__((packed));
00059 
00060 
00061 #endif
00062