Squashed 'third_party/rawrtc/re/' content from commit f3163ce8b
Change-Id: I6a235e6ac0f03269d951026f9d195da05c40fdab
git-subtree-dir: third_party/rawrtc/re
git-subtree-split: f3163ce8b526a13b35ef71ce4dd6f43585064d8a
diff --git a/src/rtp/rtcp.h b/src/rtp/rtcp.h
new file mode 100644
index 0000000..3c22c24
--- /dev/null
+++ b/src/rtp/rtcp.h
@@ -0,0 +1,120 @@
+/**
+ * @file rtcp.h Internal interface to RTCP
+ *
+ * Copyright (C) 2010 Creytiv.com
+ */
+
+
+/** RTCP protocol values */
+enum {
+ RTCP_HDR_SIZE = 4, /**< Size of common RTCP header */
+ RTCP_SRC_SIZE = 4, /**< Size of Source field */
+ RTCP_SR_SIZE = 20, /**< Size of Sender Information */
+ RTCP_RR_SIZE = 24, /**< Size of Report Block */
+ RTCP_APP_SIZE = 8, /**< Size of Application packet */
+ RTCP_FIR_SIZE = 4, /**< Size of FIR packet */
+ RTCP_NACK_SIZE = 8, /**< Size of NACK packet */
+ RTCP_FB_SIZE = 8, /**< Size of Feedback packets */
+ RTCP_MAX_SDES = 255, /**< Maximum text length for SDES */
+ RTCP_HEADROOM = 4, /**< Headroom in RTCP packets */
+};
+
+/** NTP Time */
+struct ntp_time {
+ uint32_t hi; /**< Seconds since 0h UTC on 1 January 1900 */
+ uint32_t lo; /**< Fraction of seconds */
+};
+
+struct hash;
+
+/** Per-source state information */
+struct rtp_source {
+ struct sa rtp_peer; /**< IP-address of the RTP source */
+ uint16_t max_seq; /**< Highest seq. number seen */
+ uint32_t cycles; /**< Shifted count of seq. number cycles */
+ uint32_t base_seq; /**< Base seq number */
+ uint32_t bad_seq; /**< Last 'bad' seq number + 1 */
+ uint32_t probation; /**< Sequ. packets till source is valid */
+ uint32_t received; /**< Packets received */
+ uint32_t expected_prior; /**< Packet expected at last interval */
+ uint32_t received_prior; /**< Packet received at last interval */
+ int transit; /**< Relative trans time for prev pkt */
+ uint32_t jitter; /**< Estimated jitter */
+ size_t rtp_rx_bytes; /**< Number of RTP bytes received */
+ uint64_t sr_recv; /**< When the last SR was received */
+ struct ntp_time last_sr; /**< NTP Timestamp from last SR received */
+ uint32_t rtp_ts; /**< RTP timestamp */
+ uint32_t psent; /**< RTP packets sent */
+ uint32_t osent; /**< RTP octets sent */
+};
+
+/** RTP Member */
+struct rtp_member {
+ struct le le; /**< Hash-table element */
+ struct rtp_source *s; /**< RTP source state */
+ uint32_t src; /**< Source - used for hash-table lookup */
+ int cum_lost; /**< Cumulative number of packets lost */
+ uint32_t jit; /**< Jitter in [us] */
+ uint32_t rtt; /**< Round-trip time in [us] */
+};
+
+
+/* Member */
+struct rtp_member *member_add(struct hash *ht, uint32_t src);
+struct rtp_member *member_find(struct hash *ht, uint32_t src);
+
+/* Source */
+void source_init_seq(struct rtp_source *s, uint16_t seq);
+int source_update_seq(struct rtp_source *s, uint16_t seq);
+void source_calc_jitter(struct rtp_source *s, uint32_t rtp_ts,
+ uint32_t arrival);
+int source_calc_lost(const struct rtp_source *s);
+uint8_t source_calc_fraction_lost(struct rtp_source *s);
+
+/* RR (Reception report) */
+int rtcp_rr_alloc(struct rtcp_rr **rrp, size_t count);
+int rtcp_rr_encode(struct mbuf *mb, const struct rtcp_rr *rr);
+int rtcp_rr_decode(struct mbuf *mb, struct rtcp_rr *rr);
+
+/* SDES (Source Description) */
+int rtcp_sdes_decode(struct mbuf *mb, struct rtcp_sdes *sdes);
+
+/* RTCP Feedback */
+int rtcp_rtpfb_gnack_encode(struct mbuf *mb, uint16_t pid, uint16_t blp);
+int rtcp_psfb_sli_encode(struct mbuf *mb, uint16_t first, uint16_t number,
+ uint8_t picid);
+int rtcp_rtpfb_decode(struct mbuf *mb, struct rtcp_msg *msg);
+int rtcp_psfb_decode(struct mbuf *mb, struct rtcp_msg *msg);
+
+/** NTP Time */
+struct timeval;
+void unix2ntp(struct ntp_time *ntp, const struct timeval *tv);
+void ntp2unix(struct timeval *tv, const struct ntp_time *ntp);
+int ntp_time_get(struct ntp_time *ntp);
+uint32_t ntp_compact(const struct ntp_time *ntp);
+uint64_t ntp_compact2us(uint32_t ntpc);
+
+/* RTP Socket */
+struct rtcp_sess *rtp_rtcp_sess(const struct rtp_sock *rs);
+
+/* RTCP message */
+typedef int (rtcp_encode_h)(struct mbuf *mb, void *arg);
+
+int rtcp_hdr_encode(struct mbuf *mb, uint8_t count, enum rtcp_type type,
+ uint16_t length);
+int rtcp_hdr_decode(struct mbuf *mb, struct rtcp_hdr *hdr);
+int rtcp_vencode(struct mbuf *mb, enum rtcp_type type, uint32_t count,
+ va_list ap);
+
+/* RTCP Session */
+struct rtcp_sess;
+
+int rtcp_sess_alloc(struct rtcp_sess **sessp, struct rtp_sock *rs);
+int rtcp_enable(struct rtcp_sess *sess, bool enabled, const char *cname);
+int rtcp_send(struct rtp_sock *rs, struct mbuf *mb);
+void rtcp_handler(struct rtcp_sess *sess, struct rtcp_msg *msg);
+void rtcp_sess_tx_rtp(struct rtcp_sess *sess, uint32_t ts,
+ size_t payload_size);
+void rtcp_sess_rx_rtp(struct rtcp_sess *sess, uint16_t seq, uint32_t ts,
+ uint32_t src, size_t payload_size,
+ const struct sa *peer);