117 lines
3 KiB
C
117 lines
3 KiB
C
|
/*
|
||
|
|
RTP.H
|
||
|
|
|
||
|
|
RTP structures and prototypes
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _RTP_H_
|
||
|
|
#define _RTP_H_
|
||
|
|
|
||
|
|
#include <pshpack8.h> /* Assume 8 byte packing throughout */
|
||
|
|
|
||
|
|
#define RTP_VERSION 2
|
||
|
|
|
||
|
|
/* Defined in rrcm_dll.h
|
||
|
|
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_IMG = 9,
|
||
|
|
RTCP_SDES_DOOR = 10,
|
||
|
|
RTCP_SDES_SOURCE = 11
|
||
|
|
} SDES_TYPE;
|
||
|
|
*/
|
||
|
|
|
||
|
|
typedef enum {
|
||
|
|
RTCP_TYPE_SR = 200, // sender report
|
||
|
|
RTCP_TYPE_RR = 201, // receiver report
|
||
|
|
RTCP_TYPE_SDES = 202, // source description
|
||
|
|
RTCP_TYPE_BYE = 203, // end of session
|
||
|
|
RTCP_TYPE_APP = 204 // app. specific
|
||
|
|
} RTCP_TYPE;
|
||
|
|
|
||
|
|
typedef unsigned __int64 NTP_TS;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
// !!! WARNING !!!
|
||
|
|
// The following word doesn't need to be swapped for NtoH()
|
||
|
|
unsigned short cc:4; /* CSRC count */
|
||
|
|
unsigned short x:1; /* header extension flag */
|
||
|
|
unsigned short p:1; /* padding flag */
|
||
|
|
unsigned short version:2; /* protocol version */
|
||
|
|
unsigned short payload:7; /* payload type */
|
||
|
|
unsigned short m:1; /* marker bit */
|
||
|
|
|
||
|
|
WORD seq; /* sequence number */
|
||
|
|
DWORD ts; /* timestamp */
|
||
|
|
DWORD ssrc; /* synchronization source */
|
||
|
|
//DWORD csrc[1]; /* optional CSRC list */
|
||
|
|
} RTP_HDR;
|
||
|
|
|
||
|
|
// common part of RTCP header
|
||
|
|
typedef struct {
|
||
|
|
unsigned short version:2; /* protocol version */
|
||
|
|
unsigned short p:1; /* padding flag */
|
||
|
|
unsigned short count:5; /* varies by payload type */
|
||
|
|
unsigned short rtcpType:8; /* payload type */
|
||
|
|
WORD length; /* packet length in dwords, without this hdr */
|
||
|
|
} RTCP_HDR;
|
||
|
|
|
||
|
|
/* reception report */
|
||
|
|
typedef struct {
|
||
|
|
DWORD ssrc; /* data source being reported */
|
||
|
|
BYTE fracLost; /* fraction lost since last SR/RR */
|
||
|
|
BYTE lostHi; /* cumulative number of packets lost (signed!) */
|
||
|
|
WORD lostLo;
|
||
|
|
DWORD lastSeq; /* extended last sequence number received */
|
||
|
|
DWORD jitter; /* interarrival jitter */
|
||
|
|
DWORD lastSR; /* last SR packet from this source */
|
||
|
|
DWORD delayLastSR; /* delay since last SR packet */
|
||
|
|
} RTCP_RR;
|
||
|
|
|
||
|
|
/* sender report (SR) */
|
||
|
|
typedef struct {
|
||
|
|
DWORD ssrc; /* source this RTCP packet refers to */
|
||
|
|
DWORD ntpHi; /* NTP timestamp - seconds */
|
||
|
|
DWORD ntpLo; /* mantissa */
|
||
|
|
DWORD timestamp; /* RTP timestamp */
|
||
|
|
DWORD packetsSent; /* packets sent */
|
||
|
|
DWORD bytesSent; /* octets sent */
|
||
|
|
/* variable-length list */
|
||
|
|
//RTCP_RR rr[1];
|
||
|
|
} RTCP_SR;
|
||
|
|
|
||
|
|
/* BYE */
|
||
|
|
typedef struct {
|
||
|
|
DWORD src[1]; /* list of sources */
|
||
|
|
/* can't express trailing text */
|
||
|
|
} RTCP_BYE;
|
||
|
|
|
||
|
|
typedef struct {
|
||
|
|
BYTE type; /* type of SDES item (rtcp_sdes_type_t) */
|
||
|
|
BYTE length; /* length of SDES item (in octets) */
|
||
|
|
char data[1]; /* text, not zero-terminated */
|
||
|
|
} RTCP_SDES_ITEM;
|
||
|
|
|
||
|
|
/* source description (SDES) */
|
||
|
|
typedef struct {
|
||
|
|
DWORD src; /* first SSRC/CSRC */
|
||
|
|
RTCP_SDES_ITEM item[1]; /* list of SDES items */
|
||
|
|
} RTCP_SDES;
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
#define INVALID_RTP_SEQ_NUMBER 0xffffffff
|
||
|
|
|
||
|
|
#include <poppack.h> /* End byte packing */
|
||
|
|
|
||
|
|
#endif // _RTP_H_
|
||
|
|
|
||
|
|
|