void rtp_session_run_rtcp_send_scheduler(RtpSession *session) {
uint64_t tc = ortp_get_cur_time_ms();
OrtpRtcpSendAlgorithm *sa = &session->rtcp.send_algo;
if (tc >= sa->tn) {
compute_rtcp_interval(session);
sa->tn = sa->tp + sa->T_rr;
if (tc >= sa->tn) {
if (sa->t_rr_last == 0) {
rtp_session_schedule_first_rtcp_send(session);
} else {
if (sa->T_rr_interval != 0) {
sa->T_rr_current_interval = (uint32_t)rtcp_rand((float)sa->T_rr_interval);
} else {
sa->T_rr_current_interval = 0;
}
if (sa->tn >= (sa->t_rr_last + sa->T_rr_current_interval)) {
rtp_session_send_regular_rtcp_packet_and_reschedule(session, tc);
} else if (rtp_session_has_fb_packets_to_send(session) == TRUE) {
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
} else {
rtp_session_reschedule(session, tc);
}
}
}
}
}
void rtp_session_send_rtcp_fb_generic_nack(RtpSession *session, uint16_t pid, uint16_t blp) {
mblk_t *m;
if ((rtp_session_avpf_enabled(session) == TRUE) && (rtp_session_avpf_feature_enabled(session, ORTP_AVPF_FEATURE_GENERIC_NACK) == TRUE)) {
m = make_rtcp_fb_generic_nack(session, pid, blp);
rtp_session_add_fb_packet_to_send(session, m);
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
}
void rtp_session_send_rtcp_fb_rpsi(RtpSession *session, uint8_t *bit_string, uint16_t bit_string_len) {
mblk_t *m;
if ((rtp_session_avpf_enabled(session) == TRUE) && (rtp_session_avpf_payload_type_feature_enabled(session, PAYLOAD_TYPE_AVPF_RPSI) == TRUE)) {
m = make_rtcp_fb_rpsi(session, bit_string, bit_string_len);
rtp_session_add_fb_packet_to_send(session, m);
if (is_fb_packet_to_be_sent_immediately(session) == TRUE) {
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
}
}
void rtp_session_send_rtcp_fb_tmmbn(RtpSession *session, uint32_t ssrc) {
mblk_t *m;
if ((rtp_session_avpf_enabled(session) == TRUE) && (rtp_session_avpf_feature_enabled(session, ORTP_AVPF_FEATURE_TMMBR) == TRUE)) {
m = make_rtcp_fb_tmmbn(session, ssrc);
if (m) {
rtp_session_add_fb_packet_to_send(session, m);
session->rtcp.send_algo.tmmbn_scheduled = TRUE;
}
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
}
void rtp_session_send_rtcp_fb_tmmbr(RtpSession *session, uint64_t mxtbr) {
mblk_t *m;
if ((rtp_session_avpf_enabled(session) == TRUE) && (rtp_session_avpf_feature_enabled(session, ORTP_AVPF_FEATURE_TMMBR) == TRUE)) {
if ((rtp_session_rtcp_rtpfb_scheduled(session, RTCP_RTPFB_TMMBR) != TRUE) && (rtp_session_get_recv_ssrc(session) != 0)) {
uint16_t overhead = (session->rtp.gs.sockfamily == AF_INET6) ? IP6_UDP_OVERHEAD : IP_UDP_OVERHEAD;
m = make_rtcp_fb_tmmbr(session, mxtbr, overhead);
rtp_session_add_fb_packet_to_send(session, m);
session->rtcp.send_algo.tmmbr_scheduled = TRUE;
}
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
}
void rtp_session_send_rtcp_fb_fir(RtpSession *session) {
mblk_t *m;
if ((rtp_session_avpf_enabled(session) == TRUE) && (rtp_session_avpf_payload_type_feature_enabled(session, PAYLOAD_TYPE_AVPF_FIR) == TRUE)) {
if (rtp_session_rtcp_psfb_scheduled(session, RTCP_PSFB_FIR) != TRUE) {
m = make_rtcp_fb_fir(session);
rtp_session_add_fb_packet_to_send(session, m);
}
if (is_fb_packet_to_be_sent_immediately(session) == TRUE) {
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
}
}
void rtp_session_send_rtcp_fb_sli(RtpSession *session, uint16_t first, uint16_t number, uint8_t picture_id) {
mblk_t *m;
if (rtp_session_avpf_enabled(session) == TRUE) {
/* Only send SLI if SLI and RPSI features have been enabled. SLI without RPSI is not really useful. */
if ((rtp_session_avpf_payload_type_feature_enabled(session, PAYLOAD_TYPE_AVPF_SLI) == TRUE)
&& (rtp_session_avpf_payload_type_feature_enabled(session, PAYLOAD_TYPE_AVPF_RPSI) == TRUE)) {
m = make_rtcp_fb_sli(session, first, number, picture_id);
rtp_session_add_fb_packet_to_send(session, m);
if (is_fb_packet_to_be_sent_immediately(session) == TRUE) {
rtp_session_send_fb_rtcp_packet_and_reschedule(session);
}
} else {
// Try to fallback to sending a PLI if the SLI feature has not been enabled.
rtp_session_send_rtcp_fb_pli(session);
}
}
}
