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128 lines
3.2 KiB
C
128 lines
3.2 KiB
C
/** rtp.h
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*
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* Copyright (C) 2013 Tox project All Rights Reserved.
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*
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* This file is part of Tox.
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*
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* Tox is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Tox is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Tox. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef __TOXRTP
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#define __TOXRTP
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#define RTP_VERSION 2
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#include <inttypes.h>
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// #include <pthread.h>
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#include "../toxcore/Messenger.h"
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#define MAX_SEQU_NUM 65535
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#define MAX_RTP_SIZE 65535
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typedef enum {
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rtp_ErrorSending = -40
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} RTPError;
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/**
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* Standard rtp header
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*/
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typedef struct _RTPHeader {
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uint8_t flags; /* Version(2),Padding(1), Ext(1), Cc(4) */
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uint8_t marker_payloadt; /* Marker(1), PlayLoad Type(7) */
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uint16_t sequnum; /* Sequence Number */
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uint32_t timestamp; /* Timestamp */
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uint32_t ssrc; /* SSRC */
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uint32_t csrc[16]; /* CSRC's table */
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uint32_t length; /* Length of the header in payload string. */
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} RTPHeader;
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/**
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* Standard rtp extension header.
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*/
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typedef struct _RTPExtHeader {
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uint16_t type; /* Extension profile */
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uint16_t length; /* Number of extensions */
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uint32_t *table; /* Extension's table */
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} RTPExtHeader;
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/**
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* Standard rtp message.
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*/
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typedef struct _RTPMessage {
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RTPHeader *header;
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RTPExtHeader *ext_header;
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uint8_t data[MAX_RTP_SIZE];
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uint32_t length;
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struct _RTPMessage *next;
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} RTPMessage;
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/**
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* RTP control session.
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*/
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typedef struct _RTPSession {
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uint8_t version;
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uint8_t padding;
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uint8_t extension;
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uint8_t cc;
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uint8_t marker;
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uint8_t payload_type;
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uint16_t sequnum; /* Set when sending */
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uint16_t rsequnum; /* Check when recving msg */
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uint32_t timestamp;
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uint32_t ssrc;
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uint32_t *csrc;
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/* If some additional data must be sent via message
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* apply it here. Only by allocating this member you will be
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* automatically placing it within a message.
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*/
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RTPExtHeader *ext_header;
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/* Msg prefix for core to know when recving */
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uint8_t prefix;
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int dest;
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struct _CSSession *cs;
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} RTPSession;
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/**
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* Must be called before calling any other rtp function.
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*/
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RTPSession *rtp_new ( int payload_type, Messenger *messenger, int friend_num );
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/**
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* Terminate the session.
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*/
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void rtp_kill ( RTPSession *session, Messenger *messenger );
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/**
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* Sends msg to _RTPSession::dest
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*/
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int rtp_send_msg ( RTPSession *session, Messenger *messenger, const uint8_t *data, uint16_t length );
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/**
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* Dealloc msg.
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*/
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void rtp_free_msg ( RTPSession *session, RTPMessage *msg );
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#endif /* __TOXRTP */
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