Enables LocalStatsCollector for the local audio levels instead of rtp stats. Fixes issue with local audio level calculations.

app.js

@@ -445,33 +445,23 @@ function muteVideo(pc, unmute) {
 }
 
 /**
- * Callback called by {@link StatsCollector} in intervals supplied to it's
- * constructor.
- * @param statsCollector {@link StatsCollector} source of the event.
+ * Callback for audio levels changed.
+ * @param jid JID of the user
+ * @param audioLevel the audio level value
  */
-function statsUpdated(statsCollector)
+function audioLevelUpdated(jid, audioLevel)
 {
-    Object.keys(statsCollector.jid2stats).forEach(function (jid)
+    var resourceJid;
+    if(jid === LocalStatsCollector.LOCAL_JID)
     {
-        var peerStats = statsCollector.jid2stats[jid];
-        Object.keys(peerStats.ssrc2AudioLevel).forEach(function (ssrc)
-        {
-            AudioLevels.updateAudioLevel(   Strophe.getResourceFromJid(jid),
-                                            peerStats.ssrc2AudioLevel[ssrc]);
-        });
-    });
-}
+        resourceJid = AudioLevels.LOCAL_LEVEL;
+    }
+    else
+    {
+        resourceJid = Strophe.getResourceFromJid(jid);
+    }
 
-/**
- * Callback called by {@link LocalStatsCollector} in intervals supplied to it's
- * constructor.
- * @param statsCollector {@link LocalStatsCollector} source of the event.
- */
-function localStatsUpdated(statsCollector)
-{
-    AudioLevels.updateAudioLevel(
-            AudioLevels.LOCAL_LEVEL,
-            statsCollector.audioLevel);
+    AudioLevels.updateAudioLevel(resourceJid, audioLevel);
 }
 
 /**
@@ -483,10 +473,7 @@ function startRtpStatsCollector()
     if (config.enableRtpStats)
     {
         statsCollector = new StatsCollector(
-            getConferenceHandler().peerconnection, 200, statsUpdated);
-
-        stopLocalRtpStatsCollector();
-
+            getConferenceHandler().peerconnection, 200, audioLevelUpdated);
         statsCollector.start();
     }
 }
@@ -511,7 +498,7 @@ function startLocalRtpStatsCollector(stream)
 {
     if(config.enableRtpStats)
     {
-        localStatsCollector = new LocalStatsCollector(stream, 200, localStatsUpdated);
+        localStatsCollector = new LocalStatsCollector(stream, 100, audioLevelUpdated);
         localStatsCollector.start();
     }
 }
@@ -1123,11 +1110,7 @@ function disposeConference(onUnload) {
         handler.peerconnection.close();
     }
     stopRTPStatsCollector();
-    if(!onUnload) {
-        startLocalRtpStatsCollector(connection.jingle.localAudio);
-    }
-    else
-    {
+    if(onUnload) {
         stopLocalRtpStatsCollector();
     }
     focus = null;

local_stats.js

@@ -6,13 +6,13 @@ var LocalStatsCollector = (function() {
      * Size of the webaudio analizer buffer.
      * @type {number}
      */
-    var WEBAUDIO_ANALIZER_FFT_SIZE = 512;
+    var WEBAUDIO_ANALIZER_FFT_SIZE = 2048;
 
     /**
      * Value of the webaudio analizer smoothing time parameter.
      * @type {number}
      */
-    var WEBAUDIO_ANALIZER_SMOOTING_TIME = 0.1;
+    var WEBAUDIO_ANALIZER_SMOOTING_TIME = 0.8;
 
     /**
      * <tt>LocalStatsCollector</tt> calculates statistics for the local stream.
@@ -54,12 +54,16 @@ var LocalStatsCollector = (function() {
         this.intervalId = setInterval(
             function () {
                 var array = new Uint8Array(analyser.frequencyBinCount);
-                analyser.getByteFrequencyData(array);
-                self.audioLevel = FrequencyDataToAudioLevel(array);
-                self.updateCallback(self);
+                analyser.getByteTimeDomainData(array);
+                var audioLevel = TimeDomainDataToAudioLevel(array);
+                if(audioLevel != self.audioLevel) {
+                    self.audioLevel = animateLevel(audioLevel, self.audioLevel);
+                    self.updateCallback(LocalStatsCollectorProto.LOCAL_JID, self.audioLevel);
+                }
             },
             this.intervalMilis
         );
+
     };
 
     /**
@@ -73,22 +77,55 @@ var LocalStatsCollector = (function() {
     };
 
     /**
-     * Converts frequency data array to audio level.
-     * @param array the frequency data array.
+     * Converts time domain data array to audio level.
+     * @param array the time domain data array.
      * @returns {number} the audio level
      */
-    var FrequencyDataToAudioLevel = function (array) {
+    var TimeDomainDataToAudioLevel = function (samples) {
+
         var maxVolume = 0;
 
-        var length = array.length;
+        var length = samples.length;
 
         for (var i = 0; i < length; i++) {
-            if (maxVolume < array[i])
-                maxVolume = array[i];
+            if (maxVolume < samples[i])
+                maxVolume = samples[i];
         }
 
-        return maxVolume / 255;
+        return parseFloat(((maxVolume - 127) / 128).toFixed(3));
     };
 
+    /**
+     * Animates audio level change
+     * @param newLevel the new audio level
+     * @param lastLevel the last audio level
+     * @returns {Number} the audio level to be set
+     */
+    function animateLevel(newLevel, lastLevel)
+    {
+        var value = 0;
+        var diff = lastLevel - newLevel;
+        if(diff > 0.2)
+        {
+            value = lastLevel - 0.2;
+        }
+        else if(diff < -0.4)
+        {
+            value = lastLevel + 0.4;
+        }
+        else
+        {
+            value = newLevel;
+        }
+
+        return parseFloat(value.toFixed(3));
+    }
+
+    /**
+     * Indicates that this audio level is for local jid.
+     * @type {string}
+     */
+    LocalStatsCollectorProto.LOCAL_JID = 'local';
+
     return LocalStatsCollectorProto;
 })();

rtp_stats.js

@@ -213,6 +213,8 @@ StatsCollector.prototype.processReport = function ()
             // but it seems to vary between 0 and around 32k.
             audioLevel = audioLevel / 32767;
             jidStats.setSsrcAudioLevel(ssrc, audioLevel);
+            if(jid != connection.emuc.myroomjid)
+                this.updateCallback(jid, audioLevel);
         }
 
         var key = 'packetsReceived';
@@ -281,7 +283,5 @@ StatsCollector.prototype.processReport = function ()
         // bar indicator
         //console.info("Loss SMA3: " + outputAvg + " Q: " + quality);
     }
-
-    self.updateCallback(self);
 };