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
|
/*
* rtcp.h: RFC1889: RTCP
*
* See the main source file 'xineliboutput.c' for copyright information and
* how to reach the author.
*
* $Id: rtcp.h,v 1.4 2010/07/19 13:20:22 phintuka Exp $
*
*/
#ifndef XINELIBOUTPUT_RTCP_H_
#define XINELIBOUTPUT_RTCP_H_
#if defined(__APPLE__) || defined(__FreeBSD__)
# include <machine/endian.h>
#else
# include <endian.h>
#endif
#ifndef PACKED
# define PACKED __attribute__((packed))
#endif
#if __BYTE_ORDER == __BIG_ENDIAN
#elif __BYTE_ORDER == __LITTLE_ENDIAN
#else
# error __BYTE_ORDER not defined
#endif
#if defined __cplusplus
extern "C" {
#endif
/* RTCP packet types */
typedef enum {
RTCP_SR = 200,
RTCP_RR = 201,
RTCP_SDES = 202,
RTCP_BYE = 203,
RTCP_APP = 204
} rtcp_type_t;
/* RTCP SDES types */
typedef enum {
RTCP_SDES_END = 0,
RTCP_SDES_CNAME = 1,
RTCP_SDES_NAME = 2,
RTCP_SDES_EMAIL = 3,
RTCP_SDES_PHONE = 4,
RTCP_SDES_LOC = 5,
RTCP_SDES_TOOL = 6,
RTCP_SDES_NOTE = 7,
RTCP_SDES_PRIV = 8
} rtcp_sdes_type_t;
/* RTCP common header word */
typedef struct {
union {
uint8_t raw[4];
struct {
#if __BYTE_ORDER == __BIG_ENDIAN
unsigned int version:2; /* protocol version */
unsigned int padding:1; /* padding flag */
unsigned int count:5; /* varies by packet type */
#else
unsigned int count:5; /* varies by packet type */
unsigned int padding:1; /* padding flag */
unsigned int version:2; /* protocol version */
#endif
unsigned int ptype:8; /* RTCP packet type */
uint16_t length; /* pkt len in words, w/o this word */
} PACKED;
} PACKED;
} PACKED rtcp_common_t;
/* RTCP RR (Reception report) */
typedef struct {
uint32_t ssrc; /* data source being reported */
unsigned int fraction:8; /* fraction lost since last SR/RR */
int lost:24; /* cumul. no. pkts lost (signed!) */
uint32_t last_seq; /* extended last seq. no. received */
uint32_t jitter; /* interarrival jitter */
uint32_t lsr; /* last SR packet from this source */
uint32_t dlsr; /* delay since last SR packet */
} PACKED rtcp_rr_t;
/* RTCP SR (Sender report) */
typedef struct {
uint32_t ssrc;
uint32_t ntp_sec; /* NTP timestamp, most significant word / seconds */
uint32_t ntp_frac;
uint32_t rtp_ts;
uint32_t psent; /* packets sent */
uint32_t osent; /* octets sent */
rtcp_rr_t rr[0]; /* variable-length list */
} PACKED rtcp_sr_t;
/* RTCP SDES item */
typedef struct {
uint8_t type; /* type of item (rtcp_sdes_type_t) */
uint8_t length; /* length of item (in octets) */
char data[0]; /* text, not null-terminated */
} PACKED rtcp_sdes_item_t;
/* RTCP packet */
typedef struct {
rtcp_common_t hdr;
union {
rtcp_sr_t sr;
struct {
uint32_t ssrc;
rtcp_rr_t rr[0];
} PACKED rr;
struct {
uint32_t ssrc; /* first SSRC/CSRC */
rtcp_sdes_item_t item[0]; /* list of SDES items */
} PACKED sdes;
struct {
uint32_t src[0]; /* list of sources */
/* can't express trailing text for reason */
} PACKED bye;
} PACKED;
} PACKED rtcp_packet_t;
#if defined __cplusplus
};
#endif
#endif /* XINELIBOUTPUT_RTCP_H_ */
|