Exposes methods for obtaining stream SSRCs and audio levels.

modules/statistics/statistics.js

@@ -137,6 +137,22 @@ var statistics = {
                 CallStats.sendAddIceCandidateFailed(e, pc);
             }
         );
+    },
+    /**
+     * Obtains audio level reported in the stats for specified peer.
+     * @param peerJid full MUC jid of the user for whom we want to obtain last
+     *        audio level.
+     * @param ssrc the SSRC of audio stream for which we want to obtain audio
+     *        level.
+     * @returns {*} a float form 0 to 1 that represents current audio level or
+     *              <tt>null</tt> if for any reason the value is not available
+     *              at this time.
+     */
+    getPeerSSRCAudioLevel: function (peerJid, ssrc) {
+
+        var peerStats = rtpStats.jid2stats[peerJid];
+
+        return peerStats ? peerStats.ssrc2AudioLevel[ssrc] : null;
     }
 };
 

modules/xmpp/JingleSessionPC.js

@@ -40,6 +40,11 @@ function JingleSessionPC(me, sid, connection, service, eventEmitter) {
     this.switchstreams = false;
 
     this.wait = true;
+    /**
+     * A map that stores SSRCs of local streams
+     * @type {{}} maps media type('audio' or 'video') to SSRC number
+     */
+    this.localStreamsSSRC = {};
     this.ssrcOwners = {};
     this.ssrcVideoTypes = {};
     this.eventEmitter = eventEmitter;
@@ -552,6 +557,15 @@ JingleSessionPC.prototype.getSsrcOwner = function (ssrc) {
     return this.ssrcOwners[ssrc];
 };
 
+/**
+ * Returns the SSRC of local audio stream.
+ * @param mediaType 'audio' or 'video' media type
+ * @returns {*} the SSRC number of local audio or video stream.
+ */
+JingleSessionPC.prototype.getLocalSSRC = function (mediaType) {
+    return this.localStreamsSSRC[mediaType];
+};
+
 JingleSessionPC.prototype.setRemoteDescription = function (elem, desctype) {
     this.remoteSDP = new SDP('');
     if (config.webrtcIceTcpDisable) {
@@ -1424,6 +1438,8 @@ JingleSessionPC.prototype.setLocalDescription = function () {
                     'ssrc': ssrc.id,
                     'type': media.type
                 });
+                // FIXME allows for only one SSRC per media type
+                self.localStreamsSSRC[media.type] = ssrc.id;
             });
         }
 

modules/xmpp/xmpp.js

@@ -596,6 +596,19 @@ var XMPP = {
             return null;
         return connection.jingle.activecall.getSsrcOwner(ssrc);
     },
+    /**
+     * Gets the SSRC of local media stream.
+     * @param mediaType the media type that tells whether we want to get
+     *        the SSRC of local audio or video stream.
+     * @returns {*} the SSRC number for local media stream or <tt>null</tt> if
+     *              not available.
+     */
+    getLocalSSRC: function (mediaType) {
+        if (!this.isConferenceInProgress()) {
+            return null;
+        }
+        return connection.jingle.activecall.getLocalSSRC(mediaType);
+    },
     // Returns true iff we have joined the MUC.
     isMUCJoined: function () {
         return connection === null ? false : connection.emuc.joined;