//云手机事件的相关逻辑 aac解码
console.log("走到DGPlayer1");
function DGPlayer(root) {
 
console.log("走到DGPlayer2");
 var events = {},
     state = 'paused';
 

 new Image().src = "/dgplayer/resources/playbutton_active.png";
 new Image().src = "/dgplayer/resources/pausebutton.png";
 new Image().src = "/dgplayer/resources/pausebutton_active.png";
 new Image().src = "/dgplayer/resources/choosefile_pressed.png";
 
 // 阻止IE中的文本选择
 root.onselectstart = function() {
     return false
 }
 
 var seekBar = (function() {
     
     var loading = root.querySelector(".seek .track .loaded"),
         progress = root.querySelector(".seek .track .progress"),
         played = root.querySelector(".seek span:first-child"),
         remaining = root.querySelector(".seek span:last-child"),
         maxWidth = loading.parentNode.offsetWidth - 2,
         loaded = 0, currentTime = 0, trackLength = 0, oldSeconds = 0;
         
         
     function pad(input) {
         return ("00" + input).slice(-2);
     }
     
     return {
         getTrackLength: function() {
             return trackLength;
         },

         setTrackLength: function(time) {
             trackLength = time;
             this.seekTime = currentTime;
         },

         getCurrentTime: function() {
             return currentTime;
         },

         setCurrentTime: function(time) {
             oldSeconds = Math.floor(currentTime / 1000 % 60);;
             currentTime = time;
             
             if (currentTime >= trackLength && trackLength > 0)
                 emit("pause");

             var t = currentTime / 1000,
                 seconds = Math.floor(t % 60),
                 minutes = Math.floor((t /= 60) % 60);
                 
             if (seconds === oldSeconds)
                 return;
             
             played.innerHTML = minutes + ':' + pad(seconds);
             
             // 如果我们知道持续时间，只显示进度条和剩余时间
             if (trackLength > 0) {
                 var r = (trackLength - currentTime) / 1000,
                     remainingSeconds = Math.floor(r % 60),
                     remainingMinutes = Math.floor((r /= 60) % 60);
                 
                 remaining.innerHTML = '-' + remainingMinutes + ':' + pad(remainingSeconds);
                 position = Math.max(0, Math.min(1, currentTime / trackLength));
                 progress.style.width = maxWidth * position + 'px';
             } else {
                 remaining.innerHTML = '-0:00';
             }
         },
         
         getAmountLoaded: function() {
             return loaded;
         },
         
         setAmountLoaded: function(val) {
             loaded = Math.max(0, Math.min(100, val));
             loading.style.width = maxWidth * (loaded / 100) + 'px';
         }
     }
     
 })();
     
 var playpause = (function() {
     
     var button = root.querySelector(".button"),
         interval = null, playing = false;
         
     button.onclick = function() {
         emit(playing ? "pause" : "play");
     };

     root.addEventListener('keyup', function(e) {
         e.which === 32 && emit(playing ? "pause" : "play");
     });
     
     function setPlaying(play) {
         if (playing = play)
             button.classList.add("pause");
         else
             button.classList.remove("pause");
     }
     
     return {
         setPlaying: setPlaying,
         getPlaying: function() {
             return playing;
         }
     }
     
 })();
 
 var slider = (function() {
     
     var handle = root.querySelector(".volume .handle"),
         progress = root.querySelector(".volume .progress"),
         track = root.querySelector(".volume .track")
         volumeLeft = root.querySelector(".volume img:first-child"),
         volumeRight = root.querySelector(".volume img:last-child");
         
     var lastY = 0, 
         down = false,
         height = 65,
         handleSize = 20,
         min = -8,
         max = height - handleSize / 2 - 3,
         curY = Math.floor(height / 2 - handleSize / 2),
         value = 50;
         
     function update(dontEmit) {
         if ('webkitTransform' in handle.style)
             handle.style.webkitTransform = "translate3d(0, " + (-max - min + curY) + "px" + ", 0)";
         else
             handle.style.bottom = max + min - curY + "px";

         progress.style.height = max - curY + "px";
         value = Math.round(100 - (curY - min) / (max - min) * 100);
         
         if (!dontEmit)
             emit("volume", value);
     }
     update();
     
     handle.onmousedown = handle.ontouchstart = function(e) {
         lastY = e.targetTouches ? e.targetTouches[0].pageY : e.clientY;
         down = true;
         e.stopPropagation();
         handle.classList.add("active");
         e.preventDefault();
     }
     
     function onMove(e) {
         var eventY = e.targetTouches ? e.targetTouches[0].pageY : e.clientY;
         var y = Math.max(min, Math.min(max, curY + eventY - lastY));
         if (!down || y === curY) return;

         curY = y;
         lastY = eventY;
         update();
     }
     
     function onUp(e) {
         if(!down) return;
         down = false;
         handle.classList.remove("active");
     }
     
     document.addEventListener("mousemove", onMove, false);
     document.addEventListener("touchmove", onMove, false);
     document.addEventListener("mouseup", onUp, false);
     document.addEventListener("touchend", onUp, false);
     
     // Handle clicking on the minimum and maximum volume icons
     function animate() {
         handle.classList.add("animatable");
         progress.classList.add("animatable");

         update();

         setTimeout(function() {
             handle.classList.remove("animatable");
             progress.classList.remove("animatable");
         }, 250);
     }
     
     volumeLeft.onclick = function() {
         curY = min;
         animate();
     }

     volumeRight.onclick = function() {
         curY = max;
         animate();
     }
     
     // 控制点击轨迹
     track.onmousedown = track.ontouchstart = function(e) {
         var y = e.targetTouches ? e.targetTouches[0].pageY : e.clientY;
         
         // 得到轨道的绝对偏移量
         var offset = 0, obj = track;
         while (obj) {
             offset += obj.offsetTop - obj.scrollTop;
             obj = obj.offsetParent;
         }
         
         curY = Math.max(min, Math.min(max, y - offset - (handleSize + min)));
         handle.onmousedown(e);
         update();
     }
     
     return {
         getValue: function() {
             return value;
         },
         
         setValue: function(val) {
             val = Math.max(0, Math.min(100, val));
             curY = max - (val / 100) * (max - min);
             update(true);
         }
     }
     
 })();
 
 var filebutton = (function() {
     
     var button = root.querySelector('.file_button'),
         input = document.createElement('input');
         
     input.setAttribute('type', 'file');
     input.style.opacity = 0;
     input.style.position = 'absolute';
     input.style.left = '-1000px';
     
     input.onchange = function(e) {
         emit('file', input.files[0]);
     }
     
     button.onclick = function() {
         input.click();
		 console.log("bbbbbbbbbbbbb");
     }
     
 })();
 
 function emit(event) {
     if (!events[event]) return;
     
     var args = Array.prototype.slice.call(arguments, 1),
         callbacks = events[event];
         
     for (var i = 0, len = callbacks.length; i < len; i++) {
         callbacks[i].apply(null, args);
     }
 } 
 
 var API = {
     on: function(event, fn) {
         events[event] || (events[event] = []);
         events[event].push(fn);
     },
     
     off: function(event, fn) {
         var eventsOf = events[event],
             index = eventsOf.indexOf(fn);
             
         ~index && eventsOf.splice(index, 1);
     }
 };
 
 // Object.defineProperty Opera垫片
 Object.defineProperty || (Object.defineProperty = function(obj, prop, config) {
     if (config.get && obj.__defineGetter__)
         obj.__defineGetter__(prop, config.get);
         
     if (config.set && obj.__defineSetter__)
         obj.__defineSetter__(prop, config.set);
 })
 
 Object.defineProperty(API, "bufferProgress", {
     get: seekBar.getAmountLoaded,
     set: seekBar.setAmountLoaded
 });
 
 Object.defineProperty(API, "state", {
     set: function(newstate) {
         playpause.setPlaying(newstate == 'playing' || newstate == 'buffering');                
         state = newstate;
     },
     
     get: function() { 
         return state;
     }
 });
 
 Object.defineProperty(API, "duration", {
     get: seekBar.getTrackLength,
     set: seekBar.setTrackLength
 });
 
 Object.defineProperty(API, "seekTime", {
     get: seekBar.getCurrentTime,
     set: seekBar.setCurrentTime
 });
 
 Object.defineProperty(API, "volume", {
     get: slider.getValue,
     set: slider.setValue
 });
 
 var img = root.querySelector(".avatar img");
 Object.defineProperty(API, "coverArt", {
     get: function() {
         return img.src;
     },
     
     set: function(src) {
         img.src = src;
     }
 });
 
 var title = root.querySelector("span.title"),
     artist = root.querySelector("span.artist");
     
 Object.defineProperty(API, "songTitle", {
     get: function() {
         return title.innerHTML;
     },
     
     set: function(val) {
         title.innerHTML = val;
     }
 });
 
 Object.defineProperty(API, "songArtist", {
     get: function() {
         return artist.innerHTML;
     },
     
     set: function(val) {
         artist.innerHTML = val;
     }
 });
 
 var description = root.querySelector('.file_description');
 Object.defineProperty(API, "fileDescription", {
     get: function() {
         return description.innerHTML;
     },
     
     set: function(val) {
         description.innerHTML = val;
     }
 });
 
 return API;
 
}