/usr/include/bitstream/ietf/rtp2250.h is in libbitstream-dev 1.3-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* rtp2250.h: Real-time Transport Protocol for MPEG-1/MPEG-2 audio/video
*****************************************************************************
* Copyright (C) 2016 VideoLAN
*
* Authors: Christophe Massiot <massiot@via.ecp.fr>
*
* 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.
*****************************************************************************/
/*
* Normative references:
* - IETF RFC 2250 RTP Payload Format for MPEG1/MPEG2 Video (January 1998)
*/
#ifndef __BITSTREAM_IETF_RTP2250_H__
#define __BITSTREAM_IETF_RTP2250_H__
#include <stdint.h> /* uint8_t, uint16_t, etc... */
#include <stdbool.h> /* bool */
#include <bitstream/ietf/rtp.h>
#ifdef __cplusplus
extern "C"
{
#endif
/*
* Reminder : MPEG video-specific header
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MBZ |T| TR | |N|S|B|E| P | | BFC | | FFC |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
AN FBV FFV
*/
#define RTP2250V_HEADER_SIZE 4
static inline void rtp2250v_set_hdr(uint8_t *p_rtpv)
{
p_rtpv[0] = 0x0;
p_rtpv[1] = 0x0;
p_rtpv[2] = 0x0;
p_rtpv[3] = 0x0;
}
static inline bool rtp2250v_check_hdr(const uint8_t *p_rtpv)
{
return (p_rtpv[0] & 0xf8) == 0x0;
}
static inline void rtp2250v_set_mpeg2(uint8_t *p_rtpv)
{
p_rtpv[0] |= 0x4;
}
static inline bool rtp2250v_check_mpeg2(const uint8_t *p_rtpv)
{
return !!(p_rtpv[0] & 0x4);
}
/*
* Reminder : MPEG-2 video-specific header extension
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|X|E|f_[0,0]|f_[0,1]|f_[1,0]|f_[1,1]| DC| PS|T|P|C|Q|V|A|R|H|G|D|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define RTP2250VX_HEADER_SIZE 4
static inline void rtp2250v_set_mpeg2_hdr(uint8_t *p_rtpv)
{
p_rtpv[4] = 0x0;
p_rtpv[5] = 0x0;
p_rtpv[6] = 0x0;
p_rtpv[7] = 0x0;
}
/*
* Reminder : MPEG Audio-specific header
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MBZ | Frag_offset |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
#define RTP2250A_HEADER_SIZE 4
static inline void rtp2250a_set_hdr(uint8_t *p_rtpa)
{
p_rtpa[0] = 0x0;
p_rtpa[1] = 0x0;
p_rtpa[2] = 0x0;
p_rtpa[3] = 0x0;
}
static inline bool rtp2250a_check_hdr(const uint8_t *p_rtpa)
{
return p_rtpa[0] == 0x0 && p_rtpa[1] == 0x0;
}
#ifdef __cplusplus
}
#endif
#endif
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