fix packet storm of vid refresh in edge case

src/mod/applications/mod_conference/mod_conference.c

@@ -1230,7 +1230,6 @@ static void *SWITCH_THREAD_FUNC conference_video_thread_run(switch_thread_t *thr
 	int yield = 0;
 	uint32_t last_member = 0;
 	switch_core_session_t *session;
-	switch_channel_t *channel;
 	switch_core_session_message_t msg = { 0 };
 
 	conference->video_running = 1;
@@ -1258,7 +1257,6 @@ static void *SWITCH_THREAD_FUNC conference_video_thread_run(switch_thread_t *thr
 			goto do_continue;
 		}
 
-		channel = NULL;
 		session = conference->floor_holder->session;
 		switch_core_session_read_lock(session);
 		switch_mutex_unlock(conference->member_mutex);
@@ -1271,8 +1269,6 @@ static void *SWITCH_THREAD_FUNC conference_video_thread_run(switch_thread_t *thr
 			goto do_continue;
 		}
 
-		channel = switch_core_session_get_channel(session);
-		
 		if (conference->floor_holder->id != last_member) {
 			int iframe = 0;
 
@@ -1315,17 +1311,10 @@ static void *SWITCH_THREAD_FUNC conference_video_thread_run(switch_thread_t *thr
 
 			if (imember->session && switch_channel_test_flag(ichannel, CF_VIDEO)) {
 				has_vid++;
-				if (switch_channel_test_flag(channel, CF_VIDEO_REFRESH_REQ)) {
-					switch_core_session_receive_message(imember->session, &msg);
-				}
 				switch_core_session_write_video_frame(imember->session, vid_frame, SWITCH_IO_FLAG_NONE, 0);
 			}
 		}
 		
-		if (switch_channel_test_flag(channel, CF_VIDEO_REFRESH_REQ)) {
-			switch_channel_clear_flag(channel, CF_VIDEO_REFRESH_REQ);
-		}
-
 		if (want_refresh) {
 			switch_core_session_receive_message(session, &msg);
 			want_refresh = 0;

src/mod/endpoints/mod_sofia/sofia.c

@@ -7137,11 +7137,13 @@ void sofia_handle_sip_i_info(nua_t *nua, sofia_profile_t *profile, nua_handle_t
 			if (!strncasecmp(sip->sip_content_type->c_type, "application", 11) && !strcasecmp(sip->sip_content_type->c_subtype, "media_control+xml")) {
 				switch_core_session_t *other_session;
 				
-				switch_channel_set_flag(channel, CF_VIDEO_REFRESH_REQ);
-
-				if (switch_core_session_get_partner(session, &other_session) == SWITCH_STATUS_SUCCESS) {
-					sofia_glue_build_vid_refresh_message(other_session, sip->sip_payload->pl_data);
-					switch_core_session_rwunlock(other_session);
+				if (switch_channel_test_flag(channel, CF_VIDEO)) {
+					if (switch_core_session_get_partner(session, &other_session) == SWITCH_STATUS_SUCCESS) {
+						sofia_glue_build_vid_refresh_message(other_session, sip->sip_payload->pl_data);
+						switch_core_session_rwunlock(other_session);
+					} else {
+						switch_channel_set_flag(channel, CF_VIDEO_REFRESH_REQ);
+					}
 				}
 
 			} else if (!strncasecmp(sip->sip_content_type->c_type, "application", 11) && !strcasecmp(sip->sip_content_type->c_subtype, "dtmf-relay")) {