fix vid switching in webrtc

src/mod/applications/mod_conference/mod_conference.c

@@ -1599,7 +1599,7 @@ static switch_status_t conference_add_member(conference_obj_t *conference, confe
 static void conference_set_video_floor_holder(conference_obj_t *conference, conference_member_t *member, switch_bool_t force)
 {
 	switch_event_t *event;
-	conference_member_t *old_member = NULL;
+	conference_member_t *old_member = NULL, *imember = NULL;
 	int old_id = 0;
 
 	if (!member) {
@@ -1623,8 +1623,6 @@ static void conference_set_video_floor_holder(conference_obj_t *conference, conf
 
 	switch_mutex_lock(conference->mutex);
 	if (!member) {
-		conference_member_t *imember;
-
 		for (imember = conference->members; imember; imember = imember->next) {
 			if (imember != conference->video_floor_holder && imember->channel && switch_channel_test_flag(imember->channel, CF_VIDEO)) {
 				member = imember;
@@ -1648,6 +1646,20 @@ static void conference_set_video_floor_holder(conference_obj_t *conference, conf
 		//switch_channel_clear_flag(old_member->channel, CF_VIDEO_PASSIVE);
 	}
 
+	for (imember = conference->members; imember; imember = imember->next) {
+		if (!imember->channel || !switch_channel_test_flag(imember->channel, CF_VIDEO)) {
+			continue;
+		}
+		switch_channel_clear_flag(imember->channel, CF_VIDEO_ECHO);
+
+		if (imember == conference->video_floor_holder) {
+			switch_channel_set_flag(imember->channel, CF_VIDEO_PASSIVE);
+		} else {
+			switch_channel_clear_flag(imember->channel, CF_VIDEO_PASSIVE);
+		}
+		switch_core_session_refresh_video(imember->session);
+	}
+
 	switch_set_flag(conference, CFLAG_FLOOR_CHANGE);
 	switch_mutex_unlock(conference->mutex);
 
@@ -7505,6 +7517,7 @@ SWITCH_STANDARD_APP(conference_function)
 	switch_channel_set_flag(channel, CF_CONFERENCE);
 	switch_channel_set_flag(channel, CF_VIDEO_PASSIVE);
 
+
 	if (switch_channel_answer(channel) != SWITCH_STATUS_SUCCESS) {
 		switch_log_printf(SWITCH_CHANNEL_SESSION_LOG(session), SWITCH_LOG_ERROR, "Channel answer failed.\n");
         goto end;

src/switch_rtp.c

@@ -54,7 +54,7 @@
 #include <switch_version.h>
 #include <switch_ssl.h>
 
-#define FIR_COUNTDOWN 50
+#define FIR_COUNTDOWN 25
 
 #define READ_INC(rtp_session) switch_mutex_lock(rtp_session->read_mutex); rtp_session->reading++
 #define READ_DEC(rtp_session)  switch_mutex_unlock(rtp_session->read_mutex); rtp_session->reading--
@@ -1527,6 +1527,20 @@ static int check_rtcp_and_ice(switch_rtp_t *rtp_session)
 	int rtcp_ok = 1;
 	switch_time_t now = switch_micro_time_now();
 
+
+	if (rtp_session->fir_countdown) {
+		if (rtp_session->fir_countdown == FIR_COUNTDOWN) {
+			do_flush(rtp_session, SWITCH_TRUE);
+		}
+
+		if (rtp_session->fir_countdown == FIR_COUNTDOWN || rtp_session->fir_countdown == 1) {
+			send_fir(rtp_session);
+			//send_pli(rtp_session);
+		}
+
+		rtp_session->fir_countdown--;
+	}
+
 	if (rtp_session->flags[SWITCH_RTP_FLAG_AUTO_CNG] && rtp_session->send_msg.header.ts &&
 		rtp_session->timer.samplecount >= (rtp_session->last_write_samplecount + (rtp_session->samples_per_interval * 60))) {
 		uint8_t data[10] = { 0 };
@@ -4621,8 +4635,10 @@ static int rtp_common_read(switch_rtp_t *rtp_session, switch_payload_t *payload_
 				pt = 100000;
 			}
 
+
 			poll_status = switch_poll(rtp_session->read_pollfd, 1, &fdr, pt);
-			
+
+
 			if (rtp_session->dtmf_data.out_digit_dur > 0) {
 				return_cng_frame();
 			}
@@ -5282,15 +5298,6 @@ SWITCH_DECLARE(switch_status_t) switch_rtp_zerocopy_read_frame(switch_rtp_t *rtp
 		return SWITCH_STATUS_FALSE;
 	}
 
-	if (rtp_session->fir_countdown) {
-		rtp_session->fir_countdown--;
-
-		if (rtp_session->fir_countdown == FIR_COUNTDOWN / 2 || rtp_session->fir_countdown == 0) {
-			send_fir(rtp_session);
-			//send_pli(rtp_session);
-		}
-	}
-
 	bytes = rtp_common_read(rtp_session, &frame->payload, &frame->flags, io_flags);
 
 	frame->data = RTP_BODY(rtp_session);
@@ -5524,7 +5531,7 @@ static int rtp_common_write(switch_rtp_t *rtp_session,
 				rtp_session->ts_norm.delta_percent = (double)((double)rtp_session->ts_norm.delta / (double)rtp_session->ts_norm.delta_avg) * 100.0f;
 
 
-				if (rtp_session->ts_norm.delta_ct > 50 && rtp_session->ts_norm.delta_percent > 125.0) {
+				if (rtp_session->ts_norm.delta_ct > 50 && rtp_session->ts_norm.delta_percent > 150.0) {
 					//printf("%s diff %d %d (%.2f)\n", switch_core_session_get_name(rtp_session->session),
 					//rtp_session->ts_norm.delta, rtp_session->ts_norm.delta_avg, rtp_session->ts_norm.delta_percent);
 					switch_rtp_video_refresh(rtp_session);