Attempts to prevent from failure in case addSource/removeSource notification is received before localDescription is created.

libs/colibri/colibri.focus.js

 ColibriFocus.prototype.addSource = function (elem, fromJid) {
 
     var self = this;
+    // FIXME: dirty waiting
+    if (!this.peerconnection.localDescription)
+    {
+        console.warn("addSource - localDescription not ready yet")
+        setTimeout(function()
+            {
+                self.addSource(elem, fromJid);
+            },
+            200
+        );
+        return;
+    }
+
     this.peerconnection.addSource(elem);
 
     var peerSsrc = this.remotessrc[fromJid];
 ColibriFocus.prototype.removeSource = function (elem, fromJid) {
 
     var self = this;
+    // FIXME: dirty waiting
+    if (!self.peerconnection.localDescription)
+    {
+        console.warn("removeSource - localDescription not ready yet");
+        setTimeout(function()
+            {
+                self.removeSource(elem, fromJid);
+            },
+            200
+        );
+        return;
+    }
+
     this.peerconnection.removeSource(elem);
 
     var peerSsrc = this.remotessrc[fromJid];

libs/strophe/strophe.jingle.sessionbase.js

 
 SessionBase.prototype.addSource = function (elem, fromJid) {
 
+    var self = this;
+    // FIXME: dirty waiting
+    if (!this.peerconnection.localDescription)
+    {
+        console.warn("addSource - localDescription not ready yet")
+        setTimeout(function()
+            {
+                self.addSource(elem, fromJid);
+            },
+            200
+        );
+        return;
+    }
+
     this.peerconnection.addSource(elem);
 
     this.modifySources();
 
 SessionBase.prototype.removeSource = function (elem, fromJid) {
 
+    var self = this;
+    // FIXME: dirty waiting
+    if (!this.peerconnection.localDescription)
+    {
+        console.warn("removeSource - localDescription not ready yet")
+        setTimeout(function()
+            {
+                self.removeSource(elem, fromJid);
+            },
+            200
+        );
+        return;
+    }
+
     this.peerconnection.removeSource(elem);
 
     this.modifySources();