signal direction in issue #41

app.js

     // put our ssrcs into presence so other clients can identify our stream
     var sess = connection.jingle.sessions[sid];
     var newssrcs = {};
+    var directions = {};
     var localSDP = new SDP(sess.peerconnection.localDescription.sdp);
     localSDP.media.forEach(function (media) {
         var type = SDPUtil.parse_mline(media.split('\r\n')[0]).media;
+
         if (SDPUtil.find_line(media, 'a=ssrc:')) {
-            var ssrc = SDPUtil.find_line(media, 'a=ssrc:').substring(7).split(' ')[0];
             // assumes a single local ssrc
+            var ssrc = SDPUtil.find_line(media, 'a=ssrc:').substring(7).split(' ')[0];
             newssrcs[type] = ssrc;
+
+            directions[type] = (SDPUtil.find_line(media, 'a=sendrecv') || SDPUtil.find_line(media, 'a=recvonly') || SDPUtil.find_line('a=sendonly') || SDPUtil.find_line('a=inactive') || 'a=sendrecv').substr(2);
         }
     });
     console.log('new ssrcs', newssrcs);
     var i = 0;
     Object.keys(newssrcs).forEach(function (mtype) {
         i++;
-        connection.emuc.addMediaToPresence(i, mtype, newssrcs[mtype]);
+        connection.emuc.addMediaToPresence(i, mtype, newssrcs[mtype], directions[mtype]);
     });
     if (i > 0) {
         connection.emuc.sendPresence();

muc.js

                 }
             });
             if (sourceNumber > 0)
-                for (var i = 1; i <= sourceNumber/2; i ++) {
+                for (var i = 1; i <= sourceNumber/3; i ++) {
                     pres.c('source',
                            {type: this.presMap['source' + i + '_type'],
-                           ssrc: this.presMap['source' + i + '_ssrc']}).up();
+                           ssrc: this.presMap['source' + i + '_ssrc'],
+                           direction: this.presMap['source'+ i + '_direction'] || 'sendrecv' }
+                    ).up();
                 }
         }
         pres.up();
     addDisplayNameToPresence: function (displayName) {
         this.presMap['displayName'] = displayName;
     },
-    addMediaToPresence: function (sourceNumber, mtype, ssrcs) {
+    addMediaToPresence: function (sourceNumber, mtype, ssrcs, direction) {
         if (!this.presMap['medians'])
             this.presMap['medians'] = 'http://estos.de/ns/mjs';
 
         this.presMap['source' + sourceNumber + '_type'] = mtype;
         this.presMap['source' + sourceNumber + '_ssrc'] = ssrcs;
+        this.presMap['source' + sourceNumber + '_direction'] = direction;
     },
     addPreziToPresence: function (url, currentSlide) {
         this.presMap['prezins'] = 'http://jitsi.org/jitmeet/prezi';