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	1	/*
	2	* This file is part of DisOrder.
	3	* Copyright (C) 2007 Richard Kettlewell
	4	*
	5	* This program is free software: you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation, either version 3 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	17	*/
	18	/** @file lib/rtp.h
	19	* @brief RTP packet header format
	20	*
	21	* See <a href="http://www.ietf.org/rfc/rfc1889.txt">RFC1889</a>.
	22	*/
	23
	24	#ifndef RTP_H
	25	#define RTP_H
	26
	27	/** @brief RTP packet header format
	28	*
	29	* See <a href="http://www.ietf.org/rfc/rfc1889.txt">RFC1889</a> (now obsoleted
	30	* by <a href="http://www.ietf.org/rfc/rfc3550.txt">RFC3550</a>).
	31	*
	32	* All values in this structure are big-endian.
	33	*/
	34	struct attribute((packed)) rtp_header {
	35	/** @brief Version, padding, extension and CSRC
	36	*
	37	* Version is bits 6 and 7; currently always 2.
	38	*
	39	* Padding is bit 5; if set frame includes padding octets.
	40	*
	41	* eXtension is bit 4; if set there is a header extension.
	42	*
	43	* CSRC Count is bits 0-3 and is the number of CSRC identifiers following the
	44	* header.
	45	*/
	46	uint8_t vpxcc;
	47
	48	/** @brief Marker and payload type
	49	*
	50	* Marker is bit 7. Profile-defined.
	51	*
	52	* Payload Type is bits 0-6. Profile defined.
	53	*/
	54	uint8_t mpt;
	55
	56	/** @brief Sequence number */
	57	uint16_t seq;
	58
	59	/** @brief Timestamp */
	60	uint32_t timestamp;
	61
	62	/** @brief Synchronization source */
	63	uint32_t ssrc;
	64	};
	65
	66	/** @brief RTP packet header format
	67	*
	68	* See <a href="http://www.ietf.org/rfc/rfc1889.txt">RFC1889</a> (now obsoleted
	69	* by <a href="http://www.ietf.org/rfc/rfc3550.txt">RFC3550</a>).
	70	*
	71	* All values in this structure are big-endian.
	72	*/
	73	struct attribute((packed)) rtp_extension {
	74	/** @brief Profile-defined extension type */
	75	uint16_t type;
	76
	77	/** @brief Length of rest of extension */
	78	uint16_t length;
	79	};
	80
	81	#endif /* RTP_H */
	82
	83	/*
	84	Local Variables:
	85	c-basic-offset:2
	86	comment-column:40
	87	fill-column:79
	88	indent-tabs-mode:nil
	89	End:
	90	*/