Exposes methods for obtaining stream SSRCs and audio levels.

modules/statistics/statistics.js

@@ -84,7 +84,24 @@ Statistics.prototype.stopRemote = function () {
         this.eventEmitter.emit(StatisticsEvents.STOP);
         this.rtpStats = null;
     }
-}
+};
+
+/**
+ * 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.
+ */
+Statistics.prototype.getPeerSSRCAudioLevel = function (peerJid, ssrc) {
+
+    var peerStats = this.rtpStats.jid2stats[peerJid];
+
+    return peerStats ? peerStats.ssrc2AudioLevel[ssrc] : null;
+};
 
 Statistics.LOCAL_JID = require("../../service/statistics/constants").LOCAL_JID;
 

modules/xmpp/JingleSessionPC.js

@@ -42,6 +42,11 @@ function JingleSessionPC(me, sid, connection, service) {
     this.addingStreams = 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 = {};
 
@@ -550,6 +555,15 @@ JingleSessionPC.prototype.readSsrcInfo = function (contents) {
     });
 };
 
+/**
+ * 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.getSsrcOwner = function (ssrc) {
     return this.ssrcOwners[ssrc];
 };
@@ -1505,6 +1519,8 @@ 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

@@ -299,5 +299,20 @@ XMPP.prototype.disconnect = function () {
     this.connection.disconnect();
 };
 
+/**
+ * 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.
+ */
+XMPP.prototype.getLocalSSRC = function (mediaType) {
+    if (this.connection.jingle.activecall &&
+        this.connection.jingle.activecall.peerconnection) {
+        return this.connection.jingle.activecall.getLocalSSRC(mediaType);
+    } else {
+        return null;
+    }
+};
 
 module.exports = XMPP;