fix: Avoids p2p when there are visitors in the meeting.

Author: damencho

JitsiConference.js

@@ -3074,6 +3074,13 @@ JitsiConference.prototype._updateProperties = function(properties = {}) {
                 });
             }
         });
+
+        const oldValue = this._hasVisitors;
+
+        this._hasVisitors = this.properties['visitor-count'] > 0;
+
+        // as this is visitor leaving, consider it leaving for _maybeStartOrStopP2P
+        oldValue && !this._hasVisitors && this._maybeStartOrStopP2P(true);
     }
 };
 
@@ -3266,7 +3273,8 @@ JitsiConference.prototype._maybeStartOrStopP2P = function(userLeftEvent) {
     if (!this.isP2PEnabled()
             || this.isP2PTestModeEnabled()
             || (browser.isFirefox() && !this._firefoxP2pEnabled)
-            || this.isE2EEEnabled()) {
+            || this.isE2EEEnabled()
+            || this._hasVisitors) {
         logger.info('Auto P2P disabled');
 
         return;