/*
 * SoundLoader
 * Visit http://createjs.com/ for documentation, updates and examples.
 *
 *
 * Copyright (c) 2012 gskinner.com, inc.
 *
 * 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.
 */

/**
 * @module PreloadJS
 */

// namespace:
this.createjs = this.createjs || {};

(function () {
	"use strict";

	// constructor
	/**
	 * A loader for HTML audio files. PreloadJS can not load WebAudio files, as a WebAudio context is required, which
	 * should be created by either a library playing the sound (such as <a href="http://soundjs.com">SoundJS</a>, or an
	 * external framework that handles audio playback. To load content that can be played by WebAudio, use the
	 * {{#crossLink "BinaryLoader"}}{{/crossLink}}, and handle the audio context decoding manually.
	 * @class SoundLoader
	 * @param {LoadItem|Object} loadItem
	 * @param {Boolean} preferXHR
	 * @extends AbstractMediaLoader
	 * @constructor
	 */
	function SoundLoader(loadItem, preferXHR) {
		this.AbstractMediaLoader_constructor(loadItem, preferXHR, createjs.Types.SOUND);

		// protected properties
		if (createjs.DomUtils.isAudioTag(loadItem)) {
			this._tag = loadItem;
		} else if (createjs.DomUtils.isAudioTag(loadItem.src)) {
			this._tag = loadItem;
		} else if (createjs.DomUtils.isAudioTag(loadItem.tag)) {
			this._tag = createjs.DomUtils.isAudioTag(loadItem) ? loadItem : loadItem.src;
		}

		if (this._tag != null) {
			this._preferXHR = false;
		}
	};

	var p = createjs.extend(SoundLoader, createjs.AbstractMediaLoader);
	var s = SoundLoader;

	// static methods
	/**
	 * Determines if the loader can load a specific item. This loader can only load items that are of type
	 * {{#crossLink "Types/SOUND:property"}}{{/crossLink}}.
	 * @method canLoadItem
	 * @param {LoadItem|Object} item The LoadItem that a LoadQueue is trying to load.
	 * @returns {Boolean} Whether the loader can load the item.
	 * @static
	 */
	s.canLoadItem = function (item) {
		return item.type == createjs.Types.SOUND;
	};

	// protected methods
	p._createTag = function (src) {
		var tag = createjs.Elements.audio();
		tag.autoplay = false;
		tag.preload = "none";

		//LM: Firefox fails when this the preload="none" for other tags, but it needs to be "none" to ensure PreloadJS works.
		tag.src = src;
		return tag;
	};

	createjs.SoundLoader = createjs.promote(SoundLoader, "AbstractMediaLoader");

}());