📄 rtp.h
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} rtcp_sdes_item_t;/* RTCP SDES */typedef struct { uint32_t ssrc; /* SSRC/CSRC identifier */ rtcp_sdes_item_t item[1]; /* SDES items */} rtcp_sdes_t;/* RTCP BYE */typedef struct { uint8_t rlen; /* reason length */ char *reason; /* reason for leaving */#ifdef WORDS_BIGENDIAN unsigned int ver: 2; /* RTP version */ unsigned int p: 1; /* padding flag */ unsigned int sc: 5; /* source count */#else unsigned int sc: 5; /* source count */ unsigned int p: 1; /* padding flag */ unsigned int ver: 2; /* RTP version */#endif uint8_t pt; /* packet type */ uint16_t len; /* length of rtcp packet */ uint32_t ssrc[1]; /* SSRC/CSRC identifier */} rtcp_bye_t;/* RTCP APP */typedef struct { char *data; /* application-dependent data */#ifdef WORDS_BIGENDIAN unsigned int ver: 2; /* RTP version */ unsigned int p: 1; /* padding flag */ unsigned int subtype: 5; /* subtype */#else unsigned int subtype: 5; /* subtype */ unsigned int p: 1; /* padding flag */ unsigned int ver: 2; /* RTP version */#endif uint8_t pt; /* packet type */ uint16_t len; /* length of rtcp packet */ uint32_t ssrc; /* SSRC/CSRC identifier */ char name[4]; /* name of APP packet */} rtcp_app_t;/* RTCP packet */typedef struct {#ifdef WORDS_BIGENDIAN unsigned int ver: 2; /* RTP version */ unsigned int p: 1; /* padding flag */ unsigned int count: 5; /* depends of packet type */#else unsigned int count: 5; /* depends of packet type */ unsigned int p: 1; /* padding flag */ unsigned int ver: 2; /* RTP version */#endif uint8_t pt; /* packet type */ uint16_t len; /* length of rtcp packet */ union { uint32_t ssrc; /* SSRC id */ rtcp_sr_t sr; /* sender report */ rtcp_rr_t rr; /* receiver report */ rtcp_sdes_t sdes; /* source description */ } r; /* rtcp report */} rtcp_packet_t;/* RTP session */typedef struct { pthread_mutex_t guard; /* session guard */ uint32_t ssrc; /* synchronization source */ unsigned int cc: 4; /* CSRC count */ uint32_t csrc[15]; /* CSRC list */ uint16_t seq; /* sequence number */ uint16_t cycles; /* sequence number cycles */ uint32_t pcount; /* packet count */ uint32_t ocount; /* octet count */ char cname[RTP_SDES_MAX]; /* canonical name */ char name[RTP_SDES_MAX]; /* user name */ char email[RTP_SDES_MAX]; /* electronic mail */ char phone[RTP_SDES_MAX]; /* phone number */ char loc[RTP_SDES_MAX]; /* user location */ char tool[RTP_SDES_MAX]; /* application/tool name */ char note[RTP_SDES_MAX]; /* notice/status */ ohtbl_t members; /* table of RTP sources */ int flags; /* RTP build flags */} rtp_t; /* RTP sender session *//* RTP source */typedef struct { pthread_mutex_t guard; /* session guard */ uint32_t ssrc; /* synchronization source */ uint16_t max_seq; /* sequence number */ uint16_t cycles; /* sequence number cycles */ uint32_t received; /* total packets received */ unsigned int lost: 24; /* cumulative number of packets lost */ uint8_t frac; /* fraction of packets lost */ uint32_t last_seq; /* extended last sequence number received */ long transit; /* relative transit time (prev packet) */ long jitter; /* estimated jitter */ long recv_jitter; /* estimated reception jitter */ uint32_t rtt; /* round trip time */ uint32_t lsr; /* last sender report */ uint32_t dlsr; /* delay since last sender report */ uint16_t min_seq; /* minimal sequence number received */ int fail_count; /* failed packet queries */ phtbl_t pqueue; /* queue of received packets */ char cname[RTP_SDES_MAX]; /* canonical name */ char name[RTP_SDES_MAX]; /* user name */ char email[RTP_SDES_MAX]; /* electronic mail */ char phone[RTP_SDES_MAX]; /* phone number */ char loc[RTP_SDES_MAX]; /* user location */ char tool[RTP_SDES_MAX]; /* application/tool name */ char note[RTP_SDES_MAX]; /* notice/status */} rtp_source_t; /* RTP source *//* RTP build parameters */typedef struct { uint8_t flags; /* RTP flags */ uint16_t xdef; /* header extension defined by profile */ uint16_t xlen; /* header extension lenght */ uint32_t *xhdr; /* header extension extra fields */ unsigned int pt: 7; /* payload type */ int len; /* payload lenght */ char *payload; /* payload */} rtp_param_t;/* Initializes a RTP 'session'. */void rtp_init (rtp_t *s, int flags);/* Destroy RTP session */void rtp_destroy (rtp_t *s);/* Adds CSRC to list. 'param' is the list of RTP parameters, and 'csrc' *//* is the CSRC id of contributing source. Returns 0 on fail, 1 on *//* success. On error, the error message will be send to 'stderr'. The *//* CSRC entries are saved in network byte order. */int rtp_add_csrc (rtp_t *s, uint32_t csrc);/* Deletes CSRC from list. 'param' is the list of RTP parameters, and *//* 'csrc' s the contributing source to be removed. Returns 0 on fail, 1 *//* on success. On error, the error message will be send to 'stderr'. The *//* CSRC entries are saved in network byte order. */int rtp_del_csrc (rtp_t *s, uint32_t csrc);/* Create a new RTP packet. 'param' is the struct containing all RTP *//* parameters, and 'session' is the RTP sender session. */void rtp_send (rtp_t *s, rtp_param_t *param, vstr_t *p);/* Free a received 'rtp_packet'. */void rtp_packet_free (rtp_packet_t *rtp_packet);/* Parses received network 'packet' and checks for validity. Returns *//* pointer to new parsed RTP packet. */rtp_packet_t *rtp_recv (rtp_t *s, vstr_t *packet);/* Creates a RTCP Sender Report + Receiver Reports */void rtcp_send_ctrl (rtp_t *s, vstr_t *vstr);/* Appends a RTCP Source Description report */void rtcp_append_sdes (rtp_t *s, vstr_t *vstr, int flags);/* Creates a RTCP Goodbye report */vstr_t *rtcp_bye (uint32_t *ssrc_list, int list_len, char *reason, int len);/* Creates a RTCP Application-Defined report *//* packet_t *rtcp_app (void); *//* Parses received RTCP packet, checks for validity and updates RTP session */int rtcp_recv (rtp_t *s, vstr_t *packet);/* Adds RTP packet to member packet queue */int rtp_enqueue (rtp_t *s, rtp_packet_t *rtp_packet);/* Get next RTP packet from packet queue */rtp_packet_t *rtp_dequeue (rtp_t *s, uint32_t ssrc);#endif /* RTP_H */⌨️ 快捷键说明
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