Add getVideoPlaybackQuality API (#225)

CHANGELOG.md

@@ -2,7 +2,7 @@ CHANGELOG
 =========
 
 ## HEAD (Unreleased)
-_(none)_
+* Add getVideoPlaybackQuality API
 
 --------------------
 

src/VideoJS.as

@@ -313,6 +313,9 @@ package{
                 case "rtmpStream":
                     return _app.model.rtmpStream;
                     break;
+                case "getVideoPlaybackQuality":
+                    return _app.model.videoPlaybackQuality;
+                    break;
             }
             return null;
         }

src/com/videojs/VideoJSModel.as

@@ -407,6 +407,13 @@ package com.videojs{
             return true;
         }
 
+        public function get videoPlaybackQuality():Object{
+            if(_provider){
+                return _provider.videoPlaybackQuality;
+            }
+            return {};
+        }
+
         /**
          * Allows this model to act as a centralized event bus to which other classes can subscribe.
          *

src/com/videojs/providers/HTTPAudioProvider.as

@@ -170,6 +170,11 @@ package com.videojs.providers{
             return _metadata;
         }
 
+        public function get videoPlaybackQuality():Object{
+          // only meant for video
+          return {};
+        }
+
         public function get srcAsString():String{
             if(_src != null && _src.path != undefined){
                 return _src.path;

src/com/videojs/providers/HTTPVideoProvider.as

@@ -271,6 +271,18 @@ package com.videojs.providers{
             return _metadata;
         }
 
+        public function get videoPlaybackQuality():Object{
+            if (_ns != null &&
+                _ns.hasOwnProperty('decodedFrames') &&
+                _ns.info.hasOwnProperty('droppedFrames')) {
+                return {
+                    droppedVideoFrames: _ns.info.droppedFrames,
+                    totalVideoFrames: _ns.decodedFrames + _ns.info.droppedFrames
+                };
+            }
+            return {};
+        }
+
         public function set src(pSrc:Object):void{
             init(pSrc, false);
         }

src/com/videojs/providers/IProvider.as

@@ -124,6 +124,12 @@ package com.videojs.providers{
          */
         function get metadata():Object;
 
+        /**
+         * Should return an object that contains playback quality details, following the
+         * form of https://w3c.github.io/media-source/#VideoPlaybackQuality
+         */
+        function get videoPlaybackQuality():Object;
+
         /**
          * Should return the most reasonable string representation of the current assets source location.
          */

src/com/videojs/providers/RTMPVideoProvider.as

@@ -202,6 +202,18 @@ package com.videojs.providers{
             return _metadata;
         }
 
+        public function get videoPlaybackQuality():Object{
+            if (_ns != null &&
+                _ns.hasOwnProperty('decodedFrames') &&
+                _ns.info.hasOwnProperty('droppedFrames')) {
+                return {
+                    droppedVideoFrames: _ns.info.droppedFrames,
+                    totalVideoFrames: _ns.decodedFrames + _ns.info.droppedFrames
+                };
+            }
+            return {};
+        }
+
         public function set src(pSrc:Object):void{
             _hasDuration = false;
             if(_isPlaying){