1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/** 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 CSession_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 */
|
