+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();
+}
+
+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'));
+ },
+};
+
+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,
+});
+
+document.createElement = function(elementName) {
+ if (elementName === "Audio" || elementName === "audio")
+ return new Sound();
+ return Document.prototype.createElement.call(this, elementName);
+};
\ No newline at end of file
git://105106.c2e0p.group / sound.git / commitdiff