Fixes problems with the adaptive simulcast.

app.js

     }
 );
 
-$(document).bind("video.selected", function(event, isPresentation, userJid) {
-    if (!isPresentation && _dataChannels && _dataChannels.length != 0) {
+function onSelectedEndpointChanged(userJid)
+{
+    console.log('selected endpoint changed: ', userJid);
+    if (_dataChannels && _dataChannels.length != 0) {
         _dataChannels[0].send(JSON.stringify({
             'colibriClass': 'SelectedEndpointChangedEvent',
-            'selectedEndpoint': (isPresentation || !userJid)
-                // TODO(gp) hmm.. I wonder which one of the Strophe methods to use..
-                ? null : userJid.split('/')[1]
+            'selectedEndpoint': (!userJid || userJid == null)
+                ? null : Strophe.getResourceFromJid(userJid)
         }));
     }
+}
+
+$(document).bind("selectedendpointchanged", function(event, userJid) {
+    onSelectedEndpointChanged(userJid);
 });
 
 function callSipButtonClicked()

data_channels.js

         // Sends 12 bytes binary message to the bridge
         //dataChannel.send(new ArrayBuffer(12));
 
-        // TODO(gp) we are supposed to tell the bridge about video selections
-        // so that it can do adaptive simulcast, What if a video selection has
-        // been made while the data channels are down or broken?
+        // when the data channel becomes available, tell the bridge about video
+        // selections so that it can do adaptive simulcast,
+        var largeVideoSrc = $('#largeVideo').attr('src');
+        var userJid = getJidFromVideoSrc(largeVideoSrc);
+        // we want the notification to trigger even if userJid is undefined,
+        // or null.
+        onSelectedEndpointChanged(userJid);
     };
 
     dataChannel.onerror = function (error)

simulcast.js

         var ssrc = simulcastLayer.primarySSRC;
         var simulcast = new Simulcast();
         simulcast._startLocalVideoStream(ssrc);
+        $(document).trigger('simulcastlayerstarted');
     });
 
     $(document).bind('stopsimulcastlayer', function(event, simulcastLayer) {
         var ssrc = simulcastLayer.primarySSRC;
         var simulcast = new Simulcast();
         simulcast._stopLocalVideoStream(ssrc);
+        $(document).trigger('simulcastlayerstopped');
     });
 }());

videolayout.js

     var currentDominantSpeaker = null;
     var lastNCount = config.channelLastN;
     var lastNEndpointsCache = [];
+    var largeVideoNewSrc = '';
 
     my.changeLocalAudio = function(stream) {
         connection.jingle.localAudio = stream;
         console.log('hover in', newSrc);
 
         if ($('#largeVideo').attr('src') != newSrc) {
+            largeVideoNewSrc = newSrc;
 
             var isVisible = $('#largeVideo').is(':visible');
 
             // changed.
             var isDesktop = isVideoSrcDesktop(newSrc);
 
+            var userJid = getJidFromVideoSrc(newSrc);
+            // we want the notification to trigger even if userJid is undefined,
+            // or null.
+            $(document).trigger("selectedendpointchanged", [userJid]);
+
             $('#largeVideo').fadeOut(300, function () {
                 var oldSrc = $(this).attr('src');
 
 
         // Triggers a "video.selected" event. The "false" parameter indicates
         // this isn't a prezi.
-        $(document).trigger("video.selected", [false, userJid]);
+        $(document).trigger("video.selected", [false]);
 
         VideoLayout.updateLargeVideo(videoSrc, 1);
 
         }
     });
 
-    $(document).bind('startsimulcastlayer', function(event, simulcastLayer) {
+    $(document).bind('simulcastlayerstarted', function(event) {
         var localVideoSelector = $('#' + 'localVideo_' + connection.jingle.localVideo.id);
         var simulcast = new Simulcast();
         var stream = simulcast.getLocalVideoStream();
         localVideoSrc = $(localVideoSelector).attr('src');
     });
 
-    $(document).bind('stopsimulcastlayer', function(event, simulcastLayer) {
+    $(document).bind('simulcastlayerstopped', function(event) {
         var localVideoSelector = $('#' + 'localVideo_' + connection.jingle.localVideo.id);
         var simulcast = new Simulcast();
         var stream = simulcast.getLocalVideoStream();
                 var selRemoteVideo = $(['#', 'remoteVideo_', session.sid, '_', msidParts[0]].join(''));
 
                 var updateLargeVideo = (ssrc2jid[videoSrcToSsrc[selRemoteVideo.attr('src')]]
-                    == ssrc2jid[videoSrcToSsrc[$('#largeVideo').attr('src')]]);
+                    == ssrc2jid[videoSrcToSsrc[largeVideoNewSrc]]);
                 var updateFocusedVideoSrc = (selRemoteVideo.attr('src') == focusedVideoSrc);
 
                 var electedStreamUrl = webkitURL.createObjectURL(electedStream);