]> 105106.c2e0p.group Git - sound.git/blobdiff - sound.js
Use ES6 Classes for Sound.
[sound.git] / sound.js
index f823be31f00e5338f75967e0ec7c3564ac09c844..0db080c5f914bb4c40d828ca2951976564286822 100644 (file)
--- a/sound.js
+++ b/sound.js
-function Sound() {
-
-       if (Sound.audioContext === undefined)
-               Sound.audioContext = new webkitAudioContext();
-
-       this._src = null;
-       this._networkState = this.NETWORK.EMPTY;
-       this._preload = true;
-       this._buffered = {};
-       this._readyState = this.READY.NOTHING;
-       this._seeking = false;
-       this._paused = true;
-       this._defaultPlaybackRate = 1;
-       this._playbackRate = 1;
-       this._played = {};
-       this._seekable = {};
-       this._ended = false;
-       this._autoplay = false;
-       this._loop = false;
-       this._volume = 1;
-       this._muted = false;
-       this._defaultMuted = false;
-
-       this.buffer = null;
-       this.node = null;
-       this.gainNode = null;
-
-       this.ajax = null;
-       this.eventListeners = { }; 
-       this.shouldBePlaying = 0;
-       this.startTime = 0;
-       this.nextStartTime = 0;
-       this.load();
+/* Copyright (c) 2014-2016 Jer Noble
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+class Sound {
+    constructor(src) {
+        if (Sound.audioContext === undefined) {
+            var AudioContext = window.AudioContext || window.webkitAudioContext || window.mozAudioContext;
+            Sound.audioContext = new AudioContext();
+        }
+
+        this._networkState = this.NETWORK.EMPTY;
+        this._preload = this.PRELOAD.AUTO;
+        this._buffered = {};
+        this._readyState = this.READY.NOTHING;
+        this._seeking = false;
+        this._paused = true;
+        this._defaultPlaybackRate = 1;
+        this._playbackRate = 1;
+        this._played = {};
+        this._seekable = {};
+        this._autoplay = true;
+        this._loop = false;
+        this._volume = 1;
+        this._muted = false;
+        this._defaultMuted = false;
+
+        this.selectResourceTimer = null;
+        this.fetchResourceTimer = null;
+        this.timeUpdateTimer = null;
+
+        this.buffer = null;
+        this.node = null;
+        this.gainNode = null;
+
+        this.ajax = null;
+        this.eventListeners = { };
+        this.startTime = 0;
+        this.nextStartTime = 0;
+
+        this.autoplaying = false;
+        this.delayingTheLoadEvent = false;
+        this.sentLoadedData = false;
+
+        this.src = src;
+    }
+
+    load() {
+        if (this.networkState === this.NETWORK.LOADING || this.networkState === this.NETWORK.IDLE)
+            this.dispatchEventAsync(new CustomEvent('abort'));
+
+        if (this.networkState !== this.NETWORK.EMPTY) {
+            this.dispatchEventAsync(new CustomEvent('emptied'));
+
+            if (this.ajax)
+                this.ajax.abort();
+
+            if (this.selectResourceTimer) {
+                clearTimeout(this.selectResourceTimer);
+                this.selectResourceTimer = null;
+            }
+
+            if (this.fetchResourceTimer) {
+                clearTimeout(this.fetchResourceTimer);
+                this.fetchResourceTimer = null;
+            }
+
+            if (this._readyState != this.READY.NOTHING)
+                this.readyState = this.READY.NOTHING;
+
+            if (!this._paused)
+                this.pause();
+
+            if (!this._seeking)
+                this._seeking = false;
+            this.currentTime = 0;
+            this.buffer = null;
+        }
+
+        this.playbackRate = this.defaultPlaybackRate;
+        this._error = null;
+        this.autoplaying = true;
+        this.stopInternal();
+        this.sentLoadedData = false;
+
+        this.selectResource();
+    }
+
+    selectResource() {
+        this.networkState = this.NETWORK.NO_SOURCE;
+        this.delayingTheLoadEvent = true;
+
+        this.selectResourceTimer = setTimeout(this.selectResourceAsync.bind(this), 0);
+    }
+
+    selectResourceAsync() {
+        this.selectResourceTimer = null;
+
+        if (!this._src) {
+            this.networkState = this.NETWORK.EMPTY;
+            return;
+        }
+
+        this.networkState = this.NETWORK.LOADING;
+        this.dispatchEventAsync(new CustomEvent('loadstart'));
+
+        this.fetchResourceTimer = setTimeout(this.fetchResource(), 0);
+    }
+
+    fetchResource() {
+        this.fetchResourceTimer = null;
+
+        if (this._preload === this.PRELOAD.NONE) {
+            this.networkState = this.NETWORK.IDLE;
+            this.dispatchEventAsync(new CustomEvent('suspend'));
+            this.delayingTheLoadEvent = false;
+            return;
+        }
+
+        this.ajax = new XMLHttpRequest();
+        this.ajax.open("GET", this._src, true);
+        this.ajax.responseType = "arraybuffer";
+        this.ajax.onprogress = this.resourceFetchingProgressed.bind(this);
+        this.ajax.onload = this.resourceFetchingSucceeded.bind(this);
+        this.ajax.onerror = this.resourceFetchingFailed.bind(this);
+        this.ajax.send();
+    }
+
+    resourceFetchingProgressed() {
+        this.dispatchEventAsync(new CustomEvent('progress'));
+    }
+
+    resourceFetchingSucceeded() {
+        if (!this.ajax.response)
+            return;
+
+        this.networkState = this.NETWORK.IDLE;
+        this.dispatchEventAsync(new CustomEvent('suspend'));
+        this.readyState = this.READY.METADATA;
+
+        try {
+            Sound.audioContext.decodeAudioData(
+                this.ajax.response,
+                this.resourceDecodingSucceeded.bind(this),
+                this.resourceDecodingFailed.bind(this)
+            );
+        } catch(exception) {
+            console.log(exception);
+        }
+    }
+
+    resourceFetchingFailed() {
+        this.error = { code: MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED };
+        this.networkState = this.NETWORK.NO_SOURCE;
+        this.dispatchEventAsync(new CustomEvent('error'));
+        this.delayingTheLoadEvent = false;
+    }
+
+    resourceDecodingSucceeded(buffer) {
+        this.buffer = buffer;
+
+        this.currentTime = 0;
+        this.dispatchEventAsync(new CustomEvent('durationchange'));
+        this.readyState = this.READY.ENOUGH_DATA;
+
+        if (this.autoplaying && this._paused && this._autoplay)
+            this.play();
+        this.dispatchEventAsync(new CustomEvent('canplaythrough'));
+    }
+
+    resourceDecodingFailed(error) {
+        this._error = { code: HTMLMediaElement.MEDIA_ERR_DECODE };
+        this.dispatchEventAsync(new CustomEvent('error'));
+        if (this._readyState === this.READY.NOTHING) {
+            this.networkState = this.NETWORK.EMPTY;
+            this.dispatchEventAsync('emptied');
+        } else
+            this.networkState = this.NETWORK.IDLE;
+    }
+
+    play() {
+        if (this._networkState === this.NETWORK.EMPTY)
+            this.loadResource();
+
+        if (!this.buffer) {
+            this.autoplaying = true;
+            return;
+        }
+
+        if (this.node)
+            return;
+
+        if (this.endedPlayback()) {
+            if (this._playbackRate > 0)
+                this.currentTime = 0;
+            else
+                this.currentTime = this.duration
+        }
+
+        if (this._paused || this.endedPlayback()) {
+            this._paused = false;
+            this.dispatchEventAsync(new CustomEvent('play'));
+
+            if (this._readyState < this.READY.FUTURE_DATA)
+                this.dispatchEventAsync(new CustomEvent('waiting'));
+            else
+                this.dispatchEventAsync(new CustomEvent('playing'));
+        }
+
+        this._autoplay = false;
+
+        this.playInternal();
+    }
+
+    playInternal() {
+        this.gainNode = Sound.audioContext.createGainNode();
+        this.gainNode.gain.value = this._muted ? 0 : this._volume;
+        this.gainNode.connect(Sound.audioContext.destination);
+
+        this.startTime = Sound.audioContext.currentTime;
+
+        this.node = Sound.audioContext.createBufferSource();
+        this.node.connect(this.gainNode);
+        this.node.buffer = this.buffer;
+        this.node.playbackRate.value = this._playbackRate;
+        this.node.onended = this.onended.bind(this);
+        if (this._playbackRate < 0)
+            this.node.start(0, 0, this.nextStartTime);
+        else
+            this.node.start(0, this.nextStartTime, this.buffer.duration - this.nextStartTime);
+
+        this.timeUpdateTimer = setInterval(this.sendTimeUpdate.bind(this), 250);
+    }
+
+    sendTimeUpdate() {
+        this.dispatchEventAsync(new CustomEvent('timeupdate'));
+    }
+
+    pause() {
+        if (this._networkState === this.NETWORK.EMPTY)
+            this.loadResource();
+
+        this._autoplay = false;
+
+        if (!this._paused) {
+            this._paused = true;
+            this.dispatchEventAsync(new CustomEvent('timeupdate'));
+            this.dispatchEventAsync(new CustomEvent('pause'));
+        }
+
+        if (!this.buffer || !this.node)
+            return;
+
+        this.nextStartTime = this._playbackRate * (Sound.audioContext.currentTime - this.startTime);
+        this.stopInternal();
+    }
+
+    stopInternal() {
+        if (this.node) {
+            this.node.disconnect();
+            delete this.node;
+        }
+        if (this.gainNode) {
+            this.gainNode.disconnect();
+            delete this.gainNode;
+        }
+
+        clearInterval(this.timeUpdateTimer);
+    }
+
+    onended() {
+        if (this._loop) {
+            this.nextStartTime = this._playbackRate < 0 ? this.duration : 0;
+            this.stopInternal();
+            this.playInternal();
+            return;
+        }
+
+        this.nextStartTime = this._playbackRate < 0 ? 0 : this.duration;
+        this.stopInternal();
+        this.dispatchEventAsync(new CustomEvent('ended'));
+    }
+
+    endedPlayback() {
+        if (this._readyState < this.READY.METADATA)
+            return false;
+
+        if (this.currentTime >= this.duration && this._playbackRate >= 0 && !this._loop)
+            return true;
+
+        if (this.currentTime <= 0 && this._playbackRate <= 0)
+            return true;
+    }
+
+    get ended() {
+        return this.endedPlayback() && this._playbackRate >= 0;
+    }
+
+    addEventListener(eventName, handler) {
+        if (!this.eventListeners[eventName])
+            this.eventListeners[eventName] = [];
+
+        var listeners = this.eventListeners[eventName];
+        if (listeners.indexOf(handler) !== -1)
+            return;
+
+        listeners.push(handler);
+    }
+
+    removeEventListener(eventName, handler) {
+        if (!this.eventListeners[eventName])
+            return;
+
+        var listeners = this.eventListeners[eventName];
+        var index = listeners.indexOf(handler);
+        if (index === -1)
+            return;
+
+        listeners.splice(index, 1);
+    }
+
+    dispatchEventAsync(event) {
+        window.setTimeout(this.dispatchEvent.bind(this, event), 0);
+    }
+
+    dispatchEvent(event) {
+        if (!this.eventListeners[event.type])
+            return;
+
+        var listeners = this.eventListeners[event.type];
+        listeners.forEach(function(listener) {
+            listener.call(this, event);
+        });
+    }
+
+    get src() {
+        return this._src;
+    }
+
+    set src(src) {
+        this._src = src;
+        if (this._src)
+            this.load();
+    }
+
+    get currentSrc() {
+        return this._src;
+    }
+
+    get setworkState() {
+        return this._networkState;
+    }
+
+    set networkState(value) {
+        this._networkState = value;
+    }
+
+    get readyState() {
+        return this._readyState;
+    }
+
+    set readyState(value) {
+        var oldState = this._readyState;
+        var newState = this._readyState = value;
+
+        if (this._networkState === this.NETWORK.EMPTY)
+            return;
+
+        if (oldState === this.READY.NOTHING && newState === this.READY.METADATA)
+            this.dispatchEventAsync('loadedmetadata');
+
+        if (oldState === this.READY.METADATA && newState >= this.READY.CURRENT_DATA) {
+            if (!this.sentLoadedData)
+                this.dispatchEventAsync('loadeddata');
+        }
+
+        if (oldState >= this.READY.FUTURE_DATA && newState <= this.READY.CURRENT_DATA) {
+            if (this.autoplaying && this._paused && this._autoplay && !this.endedPlayback() && !this._error) {
+                this.dispatchEventAsync('timeupdate');
+                this.dispatchEventAsync('waiting');
+                this.nextStartTime = this._playbackRate * (Sound.audioContext.currentTime - this.startTime);
+                this.stopInternal();
+            }
+        }
+
+        if (oldState <= this.READY.CURRENT_DATA && newState === this.READY.FUTURE_DATA) {
+            this.dispatchEventAsync('canplay');
+            if (!this._paused)
+                this.dispatchEventAsync('playing');
+        }
+
+        if (oldState <= this.READY.CURRENT_DATA && newState === this.READY.FUTURE_DATA) {
+            this.dispatchEventAsync('canplay');
+            if (!this._paused) {
+                this.dispatchEventAsync('playing');
+                this.playInternal();
+            }
+
+            if (this.autoplaying && this._paused && this._autoplay)
+                this.play();
+        }
+    }
+
+    get preload() {
+        switch (this._preload) {
+            case this.PRELOAD.NONE: return 'none';
+            case this.PRELOAD.METADATA: return 'metadata';
+            case this.PRELOAD.AUTO: return 'auto';
+            default: return '';
+        }
+    }
+
+    set preload(preload) {
+        switch (preload) {
+            default:
+            case 'none':
+                this._preload = this.PRELOAD.NONE;
+                break;
+            case 'metadata':
+                this._preload = this.PRELOAD.METADATA;
+                if (this._networkState === this.NETWORK.EMPTY)
+                    this.load();
+                break;
+            case 'auto':
+                this._preload = this.PRELOAD.auto;
+                if (this._networkState === this.NETWORK.EMPTY)
+                    this.load();
+                break;
+        }
+    }
+
+    get currentTime() {
+        if (!this.node)
+            return this.nextStartTime;
+        return this.nextStartTime + this._playbackRate * (Sound.audioContext.currentTime - this.startTime);
+    }
+
+    set currentTime(time) {
+        this.nextStartTime = parseFloat(time);
+        this.dispatchEventAsync(new CustomEvent('timeupdate'));
+        if (!this.node)
+            return;
+
+        this.stopInternal();
+        this.playInternal();
+    }
+
+    get duration() {
+        if (!this.buffer)
+            return NaN;
+
+        return this.buffer.duration;
+    }
+
+    get paused() {
+        return this._paused;
+    }
+
+    get playbackRate() {
+        return this._playbackRate;
+    }
+
+    set playbackRate(rate) {
+        var oldPlaybackRate = this._playbackRate;
+        this._playbackRate = parseFloat(rate);
+        this.dispatchEventAsync(new CustomEvent('ratechange'));
+
+        if (this.node) {
+            var currentTime = Sound.audioContext.currentTime
+            this.nextStartTime += oldPlaybackRate * (currentTime - this.startTime);
+            this.startTime = currentTime;
+            this.node.playbackRate.value = this._playbackRate;
+
+            if ((oldPlaybackRate <= 0) != (this._playbackRate <= 0)) {
+                this.stopInternal();
+                this.playInternal();
+            }
+        }
+    }
+
+    get defaultPlaybackRate() {
+        return this._defaultPlaybackRate;
+    }
+
+    set defaultPlaybackRate(rate) {
+        this._defaultPlaybackRate = parseFloat(rate);
+        this.dispatchEventAsync(new CustomEvent('ratechange'));
+    }
+
+    get volume() {
+        return this._volume;
+    }
+
+    set volume(volume) {
+        if (this._volume === volume)
+            return;
+
+        this._volume = parseFloat(volume);
+        this.dispatchEventAsync(new CustomEvent('volumechange'));
+
+        if (this.gainNode)
+            this.gainNode.gain.value = this._muted ? 0 : this._volume;
+    }
+
+    get muted() {
+        return this._muted;
+    }
+
+    set muted(muted) {
+        if (this._muted === muted)
+            return;
+
+        this._muted = muted;
+        this.dispatchEventAsync(new CustomEvent('volumechange'));
+
+        if (this.gainNode)
+            this.gainNode.gain.value = this._muted ? 0 : this._volume;
+    }
+
+    get autoplay() {
+        return this._autoplay;
+    }
+
+    set autoplay(autoplay) {
+        if (this._autoplay === autoplay)
+            return;
+
+        this._autoplay = autoplay;
+        if (this._autoplay && this._networkState === this.NETWORK.EMPTY)
+            this.load();
+    }
+
+    get loop() {
+        return this._loop;
+    }
+
+    set loop(loop) {
+        this._loop = loop;
+    }
 }
 
-Sound.prototype = {
-       /* Constants */
-       ERR: {
-               NONE: 0,
-               ABORTED: 1,
-               NETWORK: 2,
-               DECODE: 3,
-               SRC_NOT_SUPPORTED: 4,
-       },
-
-       NETWORK: {
-               EMPTY: 0,
-               IDLE: 1,
-               LOADING: 2,
-               NO_SOURCE: 3,
-       },
-
-       READY: {
-               NOTHING: 0,
-               METADATA: 1,
-               CURRENT_DATA: 2,
-               FUTURE_DATA: 3,
-               ENOUGH_DATA: 4,
-       },
-
-       load: function() {
-               if (this.ajax)
-                       this.ajax.abort();
-
-               if (this.networkState === this.NETWORK.LOADING || this.networkState === this.NETWORK.IDLE) {
-                       this.dispatchEventAsync(new CustomEvent('emptied'));
-                       this.setReadyState(this.READY.NOTHING);
-                       if (!this._paused)
-                               this.pause();
-                       if (!this._seeking)
-                               this._seeking = false;
-                       this.setCurrentTime(0);
-                       this.buffer = null;
-               }
-
-               this.setPlaybackRate(this.defaultPlaybackRate);
-               this._error = null;
-               this._autoplay = true;
-               this.stopInternal();
-
-               if (!this._src) {
-                       this._networkState = this.NETWORK.EMPTY;
-                       return;
-               }
-
-               this._networkState = this.NETWORK.LOADING;
-               this.dispatchEventAsync(new CustomEvent('loadstart'));
-
-               this.ajax = new XMLHttpRequest();
-               this.ajax.open("GET", this._src, true);
-               this.ajax.responseType = "arraybuffer";
-               this.ajax.onload = function() {
-                       if (!this.ajax.response)
-                               return;
-                       
-                       this.setReadyState(this.READY.FUTURE_DATA);
-
-                       try {
-                               Sound.audioContext.decodeAudioData(
-                                       this.ajax.response, 
-                                       function(buffer) {
-                                               this.buffer = buffer;
-                                               if (this.shouldBePlaying)
-                                                       this.play();
-                                       }.bind(this), 
-                                       function(error) { 
-                                               console.log("Error in creating buffer for sound '" + this._src + "': " + error); 
-                                       }.bind(this)
-                               );
-                       } catch(exception) {
-                               console.log(exception);
-                       }
-               }.bind(this);
-               this.ajax.onprogress = function() {
-                       this.dispatchEventAsync(new CustomEvent('progress'));
-               }.bind(this);
-               this.ajax.send();
-       },
-
-       play: function() {
-               if (!this.buffer) {
-                       this.shouldBePlaying = true;                    
-                       return;
-               }
-
-               if (this.node)
-                       return;
-
-               if (this._ended && this._playbackRate > 0)
-                       this.setCurrentTime(0);
-
-               if (this._paused) {
-                       this._paused = false;
-                       this.dispatchEventAsync(new CustomEvent('play'));
-
-                       if (this._readyState < this.READY.FUTURE_DATA)
-                               this.dispatchEventAsync(new CustomEvent('waiting'));
-                       else
-                               this.dispatchEventAsync(new CustomEvent('playing'));
-               }
-
-               this._autoplay = false;
-
-               this.playInternal();
-       },
-
-       playInternal: function() {
-               this.gainNode = Sound.audioContext.createGainNode();
-               this.gainNode.gain.value = this._volume;
-               this.gainNode.connect(Sound.audioContext.destination);
-
-               this.node = Sound.audioContext.createBufferSource();
-               this.node.connect(this.gainNode);
-               this.node.buffer = this.buffer;
-               this.node.playbackRate.value = this._playbackRate;
-               this.node.start(0, this.nextStartTime);
-               this.node.onended = this.onended.bind(this);
-       },
-
-
-       pause: function() {
-               this._autoplay = false;
-
-               if (!this._paused) {
-                       this._paused = false;
-                       this.dispatchEventAsync(new CustomEvent('timeupdate'));
-                       this.dispatchEventAsync(new CustomEvent('pause'));
-               }
-
-               if (!this.buffer || !this.node)
-                       return;
-
-               this.nextStartTime = Sound.audioContext.currentTime - this.startTime;
-               this.stopInternal();
-       },
-
-       stopInternal: function() {
-               if (this.node) {
-                       this.node.disconnect();
-                       delete this.node;
-               }
-               if (this.gainNode) {
-                       this.gainNode.disconnect();
-                       delete this.gainNode;
-               }
-       },
-
-       onended: function() {
-               this._ended = true;
-               this.nextStartTime = 0;
-               this.stopInternal();
-               this.dispatchEventAsync(new CustomEvent('ended'));
-       },
-
-       addEventListener: function(eventName, handler) {
-               if (!this.eventListeners[eventName])
-                       this.eventListeners[eventName] = [];
-
-               var listeners = this.eventListeners[eventName];
-               if (listeners.indexOf(handler) !== -1)
-                       return;
-
-               listeners.push(handler);
-       },
-
-       removeEventListener: function(eventName, handler) {
-               if (!this.eventListeners[eventName])
-                       return;
-
-               var listeners = this.eventListeners[eventName];
-               var index = listeners.indexOf(handler);
-               if (index === -1)
-                       return;
-
-               listeners.splice(index, 1);
-       },
-
-       dispatchEventAsync: function(event) {
-               window.setTimeout(this.dispatchEvent.bind(this, event), 0);
-       },
-
-       dispatchEvent: function(event) {
-               if (!this.eventListeners[event.type])
-                       return;
-
-               event.target = this;
-               var listeners = this.eventListeners[event.type];
-               listeners.forEach(function(listener) {
-                       listener.call(this, event);
-               });
-       },
-
-       getSrc: function() {
-               return this._src;
-       },
-
-       setSrc: function(src) {
-               this._src = src;
-               this.load();
-       },
-
-       getCurrentSrc: function() {
-               return this._src;
-       },
-
-       getNetworkState: function() {
-               return this._networkState;
-       },
-
-       getReadyState: function() {
-               return this._readyState;
-       },
-
-       setReadyState: function(value) {
-               this._readyState = value;
-       },
-
-       getPreload: function() {
-               if (!this._preload)
-                       return 'none';
-               return 'auto';
-       },
-
-       setPreload: function(preload) {
-               switch (preload) {
-               case 'none':
-                       this._preload = false;
-                       break;
-               default:
-                       this._preload = true;
-                       if (!this.buffer)
-                               load();
-                       break;
-               }
-       },
-
-       getCurrentTime: function() {
-               if (!this.node)
-                       return this.nextStartTime;
-               return this.nextStartTime + Sound.audioContext.currentTIme - this.startTime;
-       },
-
-       setCurrentTime: function(time) { 
-               this.nextStartTime = time;
-               this.dispatchEventAsync(new CustomEvent('timeupdate'));
-               if (!this.node)
-                       return;
-
-               this.stopInternal();
-               this.playInternal();
-       },
-
-       getDuration: function() {
-               if (!this.buffer)
-                       return NaN;
-
-               return this.buffer.duration;
-       },
-
-       getPaused: function() {
-               return this._paused;
-       },
-
-       getPlaybackRate: function() {
-               return this._playbackRate;
-       },
-
-       setPlaybackRate: function(rate) {
-               this._playbackRate = rate;
-               
-               if (this.buffer) {
-                       this.stopInternal();
-                       this.playInternal();
-               }
-       },
-
-       getVolume: function() {
-               return this._volume;
-       },
-
-       setVolume: function(volume) {
-               this._volume = volume;
-               if (!this.gainNode)
-                       return;
-
-               this.gainNode.gain.value = volume;
-               this.dispatchEventAsync(new CustomEvent('volumechange'));
-       },
+Sound.prototype.ERR = {
+    NONE: 0,
+    ABORTED: 1,
+    NETWORK: 2,
+    DECODE: 3,
+    SRC_NOT_SUPPORTED: 4,
 };
 
-Object.defineProperty(Sound.prototype, 'src', {
-       get: Sound.prototype.getSrc,
-       set: Sound.prototype.setSrc,
-});
-
-Object.defineProperty(Sound.prototype, 'currentSrc', {
-       get: Sound.prototype.getCurrentSrc,
-});
-
-Object.defineProperty(Sound.prototype, 'networkState', {
-       get: Sound.prototype.getNetworkState,
-});
-
-Object.defineProperty(Sound.prototype, 'preload', {
-       get: Sound.prototype.getPreload,
-       set: Sound.prototype.setPreload,
-});
-
-Object.defineProperty(Sound.prototype, 'buffered', {
-       get: Sound.prototype.getBuffered,
-});
-
-Object.defineProperty(Sound.prototype, 'readyState', {
-       get: Sound.prototype.getReadyState,
-});
-
-Object.defineProperty(Sound.prototype, 'seeking', {
-       get: Sound.prototype.getSeeking,
-});
-
-Object.defineProperty(Sound.prototype, 'currentTime', {
-       get: Sound.prototype.getCurrentTime,
-       set: Sound.prototype.setCurrentTime,
-});
-
-Object.defineProperty(Sound.prototype, 'duration', {
-       get: Sound.prototype.getDuration,
-});
-
-Object.defineProperty(Sound.prototype, 'paused', {
-       get: Sound.prototype.getPaused,
-});
-
-Object.defineProperty(Sound.prototype, 'defaultPlaybackRate', {
-       get: Sound.prototype.getDefaultPlaybackRate,
-       set: Sound.prototype.setDefaultPlaybackRate,
-});
-
-Object.defineProperty(Sound.prototype, 'playbackRate', {
-       get: Sound.prototype.getPlaybackRate,
-       set: Sound.prototype.setPlaybackRate,
-});
-
-Object.defineProperty(Sound.prototype, 'played', {
-       get: Sound.prototype.getPlayed,
-});
-
-Object.defineProperty(Sound.prototype, 'seekable', {
-       get: Sound.prototype.getSeekable,
-});
-
-Object.defineProperty(Sound.prototype, 'ended', {
-       get: Sound.prototype.getEnded,
-});
-
-Object.defineProperty(Sound.prototype, 'autoplay', {
-       get: Sound.prototype.getAutoplay,
-       set: Sound.prototype.setAutoplay,
-});
-
-Object.defineProperty(Sound.prototype, 'loop', {
-       get: Sound.prototype.getLoop,
-       set: Sound.prototype.setLoop,
-});
-
-Object.defineProperty(Sound.prototype, 'controls', {
-       get: Sound.prototype.getControls,
-       set: Sound.prototype.setControls,
-});
-
-Object.defineProperty(Sound.prototype, 'volume', {
-       get: Sound.prototype.getVolume,
-       set: Sound.prototype.setVolume,
-});
-
-Object.defineProperty(Sound.prototype, 'muted', {
-       get: Sound.prototype.getMuted,
-       set: Sound.prototype.setMuted,
-});
-
-Object.defineProperty(Sound.prototype, 'defaultMuted', {
-       get: Sound.prototype.getDefaultMuted,
-       set: Sound.prototype.setDefaultMuted,
-});
+Sound.prototype.NETWORK = {
+    EMPTY: 0,
+    IDLE: 1,
+    LOADING: 2,
+    NO_SOURCE: 3,
+};
+
+Sound.prototype.READY = {
+    NOTHING: 0,
+    METADATA: 1,
+    CURRENT_DATA: 2,
+    FUTURE_DATA: 3,
+    ENOUGH_DATA: 4,
+};
+
+Sound.prototype.PRELOAD = {
+    NONE: 0,
+    METADATA: 1,
+    AUTO: 2,
+};
 
 document.createElement = function(elementName) {
-       if (elementName === "Audio" || elementName === "audio")
-               return new Sound();
-       return Document.prototype.createElement.call(this, elementName);
+    if (elementName === "Audio" || elementName === "audio")
+        return new Sound();
+    return Document.prototype.createElement.call(this, elementName);
+};
+
+window.Audio = function(src) {
+    return new Sound(src);
 };
\ No newline at end of file