blob: 750dcb3bb95fa4126e80f72bd96deb85e7d6294d (
plain)
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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
|
/* $Header: /pjproject/pjmedia/src/pjmedia/rtcp.h 5 8/24/05 10:30a Bennylp $ */
#ifndef __PJMEDIA_RTCP_H__
#define __PJMEDIA_RTCP_H__
/**
* @file rtcp.h
* @brief RTCP implementation.
*/
#include <pj/types.h>
#include <pjmedia/rtp.h>
PJ_BEGIN_DECL
/**
* @defgroup PJMED_RTCP RTCP
* @ingroup PJMEDIA
* @{
*/
/**
* RTCP sender report.
*/
struct pj_rtcp_sr
{
pj_uint32_t ssrc;
pj_uint32_t ntp_sec;
pj_uint32_t ntp_frac;
pj_uint32_t rtp_ts;
pj_uint32_t sender_pcount;
pj_uint32_t sender_bcount;
};
typedef struct pj_rtcp_sr pj_rtcp_sr;
/**
* RTCP receiver report.
*/
struct pj_rtcp_rr
{
pj_uint32_t ssrc;
#if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0
pj_uint32_t fract_lost:8;
pj_uint32_t total_lost_2:8;
pj_uint32_t total_lost_1:8;
pj_uint32_t total_lost_0:8;
#else
pj_uint32_t fract_lost:8;
pj_uint32_t total_lost_0:8;
pj_uint32_t total_lost_1:8;
pj_uint32_t total_lost_2:8;
#endif
pj_uint32_t last_seq;
pj_uint32_t jitter;
pj_uint32_t lsr;
pj_uint32_t dlsr;
};
typedef struct pj_rtcp_rr pj_rtcp_rr;
/**
* RTCP common header.
*/
struct pj_rtcp_common
{
#if defined(PJ_IS_BIG_ENDIAN) && PJ_IS_BIG_ENDIAN!=0
unsigned version:2; /* packet type */
unsigned p:1; /* padding flag */
unsigned count:5; /* varies by payload type */
unsigned pt:8; /* payload type */
#else
unsigned count:5; /* varies by payload type */
unsigned p:1; /* padding flag */
unsigned version:2; /* packet type */
unsigned pt:8; /* payload type */
#endif
pj_uint16_t length; /* packet length */
};
typedef struct pj_rtcp_common pj_rtcp_common;
/**
* RTCP packet.
*/
struct pj_rtcp_pkt
{
pj_rtcp_common common;
pj_rtcp_sr sr;
pj_rtcp_rr rr; /* variable-length list */
};
typedef struct pj_rtcp_pkt pj_rtcp_pkt;
/**
* NTP time representation.
*/
struct pj_rtcp_ntp_rec
{
pj_uint32_t hi;
pj_uint32_t lo;
};
typedef struct pj_rtcp_ntp_rec pj_rtcp_ntp_rec;
/**
* RTCP session.
*/
struct pj_rtcp_session
{
pj_rtcp_pkt rtcp_pkt;
pj_rtp_seq_session seq_ctrl;
pj_uint32_t received; /* packets received */
pj_uint32_t expected_prior; /* packet expected at last interval */
pj_uint32_t received_prior; /* packet received at last interval */
pj_int32_t transit; /* relative trans time for prev pkt */
pj_uint32_t jitter; /* estimated jitter */
pj_rtcp_ntp_rec rtcp_lsr; /* NTP timestamp in last sender report received */
unsigned rtcp_lsr_time; /* Time when last RTCP SR is received. */
unsigned peer_ssrc; /* Peer SSRC */
};
typedef struct pj_rtcp_session pj_rtcp_session;
/**
* Init RTCP session.
* @param session The session
* @param ssrc The SSRC used in to identify the session.
*/
PJ_DECL(void) pj_rtcp_init( pj_rtcp_session *session, pj_uint32_t ssrc );
/**
* Deinit RTCP session.
* @param session The session.
*/
PJ_DECL(void) pj_rtcp_fini( pj_rtcp_session *session);
/**
* Call this function everytime an RTP packet is received to let the RTCP
* session do its internal calculations.
* @param session The session.
* @param seq The RTP packet sequence number, in host byte order.
* @param ts The RTP packet timestamp, in host byte order.
*/
PJ_DECL(void) pj_rtcp_rx_rtp( pj_rtcp_session *session, pj_uint16_t seq, pj_uint32_t ts );
/**
* Call this function everytime an RTP packet is sent to let the RTCP session
* do its internal calculations.
* @param session The session.
* @param bytes_payload_size The payload size of the RTP packet (ie packet minus
* RTP header).
*/
PJ_DECL(void) pj_rtcp_tx_rtp( pj_rtcp_session *session, pj_uint16_t bytes_payload_size );
/**
* Build a RTCP SR/RR packet to be transmitted to remote RTP peer.
* @param session The session.
* @param rtcp_pkt [output] Upon return, it will contain pointer to the RTCP packet.
* @param len [output] Upon return, it will indicate the size of the RTCP packet.
*/
PJ_DECL(void) pj_rtcp_build_rtcp( pj_rtcp_session *session, pj_rtcp_pkt **rtcp_pkt, int *len );
/**
* @}
*/
PJ_END_DECL
#endif /* __PJMEDIA_RTCP_H__ */
|
