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/* rtp_message.h
*
* Rtp Message handler. It handles message/header parsing.
* Refer to RTP: A Transport Protocol for Real-Time Applications ( RFC 3550 ) for more info. !Red!
*
*
* Copyright (C) 2013 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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 3 of the License, or
* (at your option) any later version.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef _RTP__MESSAGE_H_
#define _RTP__MESSAGE_H_
#include "../toxcore/network.h"
#include "toxrtp_helper.h"
#include "../toxcore/tox.h"
/* Defines */
#define _MAX_SEQU_NUM 65535
/* Minimum size */
#define _MIN_HEADER_LENGTH 12
#define _MIN_EXT_HEADER_LENGTH 4
/* End of defines */
typedef struct rtp_dest_list_s {
tox_IP_Port _dest;
struct rtp_dest_list_s* next;
} rtp_dest_list_t;
typedef struct rtp_header_s {
uint8_t _flags; /* Version(2),Padding(1), Ext(1), Cc(4) */
uint8_t _marker_payload_t; /* Marker(1), PlayLoad Type(7) */
uint16_t _sequence_number; /* Sequence Number */
uint32_t _timestamp; /* Timestamp */
uint32_t _ssrc; /* SSRC */
uint32_t* _csrc; /* CSRC's table */
uint32_t _length; /* A little something for allocation */
} rtp_header_t;
typedef struct rtp_ext_header_s {
uint16_t _ext_type; /* Extension profile */
uint16_t _ext_len; /* Number of extensions */
uint32_t* _hd_ext; /* Extension's table */
} rtp_ext_header_t;
typedef struct rtp_msg_s {
struct rtp_header_s* _header;
struct rtp_ext_header_s* _ext_header;
uint32_t _header_lenght;
uint8_t* _data;
uint32_t _length;
tox_IP_Port _from;
struct rtp_msg_s* _next;
} rtp_msg_t;
/* Extracts the header from the payload starting at _from */
rtp_header_t* rtp_extract_header ( const uint8_t* _payload, size_t _bytes );
rtp_ext_header_t* rtp_extract_ext_header ( const uint8_t* _payload, size_t _bytes );
uint8_t* rtp_add_header ( rtp_header_t* _header, uint8_t* _payload );
uint8_t* rtp_add_extention_header ( rtp_ext_header_t* _header, uint8_t* _payload );
/* Gets the size of the header _header in bytes */
size_t rtp_header_get_size ( const rtp_header_t* _header );
void rtp_header_print (const rtp_header_t* _header);
/* Adding flags and settings */
void rtp_header_add_flag_version ( rtp_header_t* _header, uint32_t value );
void rtp_header_add_flag_padding ( rtp_header_t* _header, uint32_t value );
void rtp_header_add_flag_extension ( rtp_header_t* _header, uint32_t value );
void rtp_header_add_flag_CSRC_count ( rtp_header_t* _header, uint32_t value );
void rtp_header_add_setting_marker ( rtp_header_t* _header, uint32_t value );
void rtp_header_add_setting_payload ( rtp_header_t* _header, uint32_t value );
/* Getting values from flags and settings */
uint8_t rtp_header_get_flag_version ( const rtp_header_t* _header );
uint8_t rtp_header_get_flag_padding ( const rtp_header_t* _header );
uint8_t rtp_header_get_flag_extension ( const rtp_header_t* _header );
uint8_t rtp_header_get_flag_CSRC_count ( const rtp_header_t* _header );
uint8_t rtp_header_get_setting_marker ( const rtp_header_t* _header );
uint8_t rtp_header_get_setting_payload_type ( const rtp_header_t* _header );
#endif /* _RTP__MESSAGE_H_ */
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