encapsultate bandwidth routine

@@ -58,6 +58,8 @@
         haveMetadata = function(error, xhr, url) {
           var parser, refreshDelay, update;
 
+          loader.bandwidth = request.bandwidth || xhr.bandwidth;
+
           // any in-flight request is now finished
           request = null;
 

@@ -409,12 +409,20 @@ videojs.Hls.prototype.fillBuffer = function(offset) {
   this.loadSegment(segmentUri, offset);
 };
 
+// Encapsulate the setBandwidth routine for future expansion
+videojs.Hls.prototype.setBandwidthByXHR = function(xhr) {
+  var tech = this;
+  // calculate the download bandwidth
+  tech.segmentXhrTime = xhr.roundTripTime;
+  tech.bandwidth = xhr.bandwidth;
+  tech.bytesReceived += xhr.bytesReceived;
+};
+
 videojs.Hls.prototype.loadSegment = function(segmentUri, offset) {
   var
     tech = this,
     player = this.player(),
-    settings = player.options().hls || {},
-    startTime = +new Date();
+    settings = player.options().hls || {};
 
   // request the next segment
   this.segmentXhr_ = videojs.Hls.xhr({
@@ -448,10 +456,7 @@ videojs.Hls.prototype.loadSegment = function(segmentUri, offset) {
       return;
     }
 
-    // calculate the download bandwidth
-    tech.segmentXhrTime = (+new Date()) - startTime;
-    tech.bandwidth = (this.response.byteLength / tech.segmentXhrTime) * 8 * 1000;
-    tech.bytesReceived += this.response.byteLength;
+    tech.setBandwidthByXHR(this);
 
     // package up all the work to append the segment
     // if the segment is the start of a timestamp discontinuity,

@@ -34,6 +34,7 @@
     request = new window.XMLHttpRequest();
     request.open(options.method, url);
     request.url = url;
+    request.requestTime = new Date().getTime();
 
     if (options.responseType) {
       request.responseType = options.responseType;
@@ -69,6 +70,13 @@
         return callback.call(this, true, url);
       }
 
+      if (this.response) {
+        this.responseTime = new Date().getTime();
+        this.roundTripTime = this.responseTime - this.requestTime;
+        this.bytesReceived = this.response.byteLength || this.response.length;
+        this.bandwidth = parseInt((this.bytesReceived / this.roundTripTime) * 8 * 1000,10);
+      }
+
       return callback.call(this, false, url);
     };
     request.send(null);