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/** rtp.h
*
* Copyright (C) 2013-2015 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_H
#define RTP_H
#define RTP_VERSION 2
#include <inttypes.h>
// #include <pthread.h>
#include "../toxcore/Messenger.h"
#define MAX_SEQU_NUM 65535
#define MAX_RTP_SIZE 65535
/**
* Payload type identifier. Also used as rtp callback prefix.
*/
typedef enum {
rtp_TypeAudio = 192,
rtp_TypeVideo
} RTPPayloadType;
/**
* Standard rtp header
*/
typedef struct {
uint8_t flags; /* Version(2),Padding(1), Ext(1), Cc(4) */
uint8_t marker_payloadt; /* Marker(1), PlayLoad Type(7) */
uint16_t sequnum; /* Sequence Number */
uint32_t timestamp; /* Timestamp */
uint32_t ssrc; /* SSRC */
uint32_t csrc[16]; /* CSRC's table */
uint32_t length; /* Length of the header in payload string. */
} RTPHeader;
/**
* Standard rtp extension header.
*/
typedef struct {
uint16_t type; /* Extension profile */
uint16_t length; /* Number of extensions */
uint32_t *table; /* Extension's table */
} RTPExtHeader;
/**
* Standard rtp message.
*/
typedef struct {
RTPHeader *header;
RTPExtHeader *ext_header;
uint8_t data[MAX_RTP_SIZE];
uint32_t length;
} RTPMessage;
/**
* RTP control session.
*/
typedef struct {
uint8_t version;
uint8_t padding;
uint8_t extension;
uint8_t cc;
uint8_t marker;
uint8_t payload_type;
uint16_t sequnum; /* Set when sending */
uint16_t rsequnum; /* Check when recving msg */
uint32_t timestamp;
uint32_t ssrc;
uint32_t *csrc;
/* If some additional data must be sent via message
* apply it here. Only by allocating this member you will be
* automatically placing it within a message.
*/
RTPExtHeader *ext_header;
/* Msg prefix for core to know when recving */
uint8_t prefix;
int dest;
struct CSSession_s *cs;
Messenger *m;
} RTPSession;
/**
* Must be called before calling any other rtp function.
*/
RTPSession *rtp_new ( int payload_type, Messenger *messenger, int friend_num );
/**
* Terminate the session.
*/
void rtp_kill ( RTPSession* session );
/**
* By default rtp is not in receiving state
*/
int rtp_start_receiving (RTPSession *session);
/**
* Pause rtp receiving mode.
*/
int rtp_stop_receiving (RTPSession *session);
/**
* Sends msg to RTPSession::dest
*/
int rtp_send_msg ( RTPSession* session, const uint8_t* data, uint16_t length );
/**
* Dealloc msg.
*/
void rtp_free_msg ( RTPSession *session, RTPMessage *msg );
#endif /* RTP_H */
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