-function Sound() {
+/* Copyright (c) 2014 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.
+ */
+
+function Sound(src) {
+
+ if (Sound.audioContext === undefined) {
+ var AudioContext = window.AudioContext || window.webkitAudioContext || window.mozAudioContext;
+ Sound.audioContext = new AudioContext();
+ }
- if (Sound.audioContext === undefined)
- Sound.audioContext = new webkitAudioContext();
-
- this._src = null;
this._networkState = this.NETWORK.EMPTY;
- this._preload = true;
+ this._preload = this.PRELOAD.AUTO;
this._buffered = {};
this._readyState = this.READY.NOTHING;
this._seeking = false;
this._played = {};
this._seekable = {};
this._ended = false;
- this._autoplay = false;
+ this._autoplay = true;
this._loop = false;
this._volume = 1;
this._muted = false;
this.gainNode = null;
this.ajax = null;
- this.eventListeners = { };
- this.shouldBePlaying = 0;
+ this.eventListeners = { };
this.startTime = 0;
this.nextStartTime = 0;
+
+ this.autoplaying = false;
+ this.delayingTheLoadEvent = false;
+
+ this.setSrc(src);
}
Sound.prototype = {
ENOUGH_DATA: 4,
},
+ PRELOAD: {
+ NONE: 0,
+ METADATA: 1,
+ AUTO: 2,
+ },
+
load: function() {
if (this.ajax)
this.ajax.abort();
this.setPlaybackRate(this.defaultPlaybackRate);
this._error = null;
- this._autoplay = true;
+ this.autoplaying = true;
this.stopInternal();
+ this.selectResource();
+
+ },
+
+ selectResource: function() {
+ this._networkState = this.NETWORK.NO_SOURCE;
+ this.delayingTheLoadEvent = true;
+
+ setTimeout(this.selectResourceAsync.bind(this), 0);
+ },
+
+ selectResourceAsync: function() {
if (!this._src) {
this._networkState = this.NETWORK.EMPTY;
return;
this._networkState = this.NETWORK.LOADING;
this.dispatchEventAsync(new CustomEvent('loadstart'));
+ setTimeout(this.fetchResource(), 0);
+ },
+
+ fetchResource: function() {
+ 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";
if (!this.ajax.response)
return;
+ this._networkState = this.NETWORK.IDLE;
+ this.dispatchEventAsync(new CustomEvent('suspend'));
this.setReadyState(this.READY.FUTURE_DATA);
try {
Sound.audioContext.decodeAudioData(
- this.ajax.response,
+ this.ajax.response,
function(buffer) {
this.buffer = buffer;
- if (this.shouldBePlaying)
+ if (this.autoplaying && this._paused && this._autoplay)
this.play();
- }.bind(this),
- function(error) {
- console.log("Error in creating buffer for sound '" + this._src + "': " + error);
+ this.dispatchEventAsync(new CustomEvent('canplaythrough'));
+ }.bind(this),
+ function(error) {
+ console.log("Error in creating buffer for sound '" + this._src + "': " + error);
}.bind(this)
);
} catch(exception) {
this.ajax.onprogress = function() {
this.dispatchEventAsync(new CustomEvent('progress'));
}.bind(this);
+ this.ajax.onerror = function() {
+ this.error = { code: MediaError.MEDIA_ERR_SRC_NOT_SUPPORTED };
+ this._networkState = this.NETWORK.NO_SOURCE;
+ this.dispatchEventAsync(new CustomEvent('error'));
+ this.delayingTheLoadEvent = false;
+ }.bind(this);
this.ajax.send();
},
play: function() {
+ if (this._networkState === this.NETWORK.EMPTY)
+ this.loadResource();
+
if (!this.buffer) {
- this.shouldBePlaying = true;
+ this.autoplaying = true;
return;
}
playInternal: function() {
this.gainNode = Sound.audioContext.createGainNode();
- this.gainNode.gain.value = this._volume;
+ 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;
pause: function() {
+ if (this._networkState === this.NETWORK.EMPTY)
+ this.loadResource();
+
this._autoplay = false;
if (!this._paused) {
setSrc: function(src) {
this._src = src;
- if (this._autoplay && this._src != null)
+ if (this._src)
this.load();
},
},
getPreload: function() {
- if (!this._preload)
- return 'none';
- return 'auto';
+ switch (this._preload) {
+ case this.PRELOAD.NONE: return 'none';
+ case this.PRELOAD.METADATA: return 'metadata';
+ case this.PRELOAD.AUTO: return 'auto';
+ default: return '';
+ }
},
setPreload: function(preload) {
switch (preload) {
- case 'none':
- this._preload = false;
- break;
- default:
- this._preload = true;
- if (!this.buffer)
- load();
- break;
+ 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;
}
},
getCurrentTime: function() {
if (!this.node)
return this.nextStartTime;
- return this.nextStartTime + Sound.audioContext.currentTIme - this.startTime;
+ return this.nextStartTime + Sound.audioContext.currentTime - this.startTime;
},
- setCurrentTime: function(time) {
+ setCurrentTime: function(time) {
this.nextStartTime = time;
this.dispatchEventAsync(new CustomEvent('timeupdate'));
if (!this.node)
},
setVolume: function(volume) {
- if (this._volume == volume)
+ if (this._volume === volume)
return;
this._volume = volume;
},
setMuted: function(muted) {
- if (this._muted == muted)
+ if (this._muted === muted)
return;
this._muted = muted;
},
setAutoplay: function(autoplay) {
- if (this._autoplay == autoplay)
+ if (this._autoplay === autoplay)
return;
this._autoplay = autoplay;
- if (this._autoplay && this._src != null)
+ if (this._autoplay && this._networkState === this.NETWORK.EMPTY)
this.load();
},
set: Sound.prototype.setDefaultMuted,
});
+Object.defineProperty(Sound.prototype, 'preload', {
+ get: Sound.prototype.getPreload,
+ set: Sound.prototype.setPreload,
+});
+
document.createElement = function(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
git://105106.c2e0p.group / sound.git / blobdiff