phaser/Phaser/sound/SoundManager.ts

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/// <reference path="../Game.ts" />
/// <reference path="Sound.ts" />
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/**
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* Phaser - SoundManager
*
* This is an embroyonic web audio sound management class. There is a lot of work still to do here.
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*/
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module Phaser {
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export class SoundManager {
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/**
* SoundManager constructor
* Create a new <code>SoundManager</code>.
*/
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constructor(game: Game) {
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this._game = game;
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if (window['PhaserGlobal'] && window['PhaserGlobal'].disableAudio == true)
{
return;
}
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if (game.device.webaudio == true)
{
if (!!window['AudioContext'])
{
this._context = new window['AudioContext']();
}
else if (!!window['webkitAudioContext'])
{
this._context = new window['webkitAudioContext']();
}
if (this._context !== null)
{
this._gainNode = this._context.createGainNode();
this._gainNode.connect(this._context.destination);
this._volume = 1;
}
}
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}
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/**
* Local private reference to game.
*/
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private _game: Game;
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/**
* Reference to AudioContext instance.
*/
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private _context = null;
/**
* Gain node created from audio context.
*/
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private _gainNode;
/**
* Volume of sounds.
* @type {number}
*/
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private _volume: number;
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/**
* Mute sounds.
*/
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public mute() {
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this._gainNode.gain.value = 0;
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}
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/**
* Enable sounds.
*/
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public unmute() {
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this._gainNode.gain.value = this._volume;
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}
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public set volume(value: number) {
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this._volume = value;
this._gainNode.gain.value = this._volume;
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}
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public get volume(): number {
return this._volume;
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}
/**
* Decode a sound with its assets key.
* @param key {string} Assets key of the sound to be decoded.
* @param callback {function} This will be invoked when finished decoding.
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* @param [sound] {Sound} its bufer will be set to decoded data.
*/
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public decode(key: string, callback = null, sound?: Sound = null) {
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var soundData = this._game.cache.getSound(key);
if (soundData)
{
if (this._game.cache.isSoundDecoded(key) === false)
{
var that = this;
this._context.decodeAudioData(soundData, function (buffer) {
that._game.cache.decodedSound(key, buffer);
if (sound)
{
sound.setDecodedBuffer(buffer);
}
callback();
});
}
}
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}
/**
* Play a sound with its assets key.
* @param key {string} Assets key of the sound you want to play.
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* @param [volume] {number} volume of the sound you want to play.
* @param [loop] {boolean} loop when it finished playing? (Default to false)
* @return {Sound} The playing sound object.
*/
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public play(key: string, volume?: number = 1, loop?: bool = false): Sound {
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if (this._context === null)
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{
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return;
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}
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var soundData = this._game.cache.getSound(key);
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if (soundData)
{
// Does the sound need decoding?
if (this._game.cache.isSoundDecoded(key) === true)
{
return new Sound(this._context, this._gainNode, soundData, volume, loop);
}
else
{
var tempSound: Sound = new Sound(this._context, this._gainNode, null, volume, loop);
// this is an async process, so we can return the Sound object anyway, it just won't be playing yet
this.decode(key, () => tempSound.play(), tempSound);
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return tempSound;
}
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}
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}
}
}