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ISound.js
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//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Sound Abstract class.
* Implement dynamic loading / unloading mechanism.
*
* @author Cedric Stoquer
*
*/
function ISound() {
// public properties
this.playing = false;
this.stopping = false;
this.fade = 0;
this.usedMemory = 0;
this.poolRef = null;
// the following properties are public but should NOT be assigned directly.
// instead, use the setter functions: setId, setVolume, setPan, setLoop, setPitch.
this.id = null;
this.volume = 1.0;
this.pan = 0.0;
this.loop = false;
this.pitch = 0.0;
// private properties
this._loaded = false;
this._loading = false;
this._unloading = false;
this._playTriggered = 0;
this._onLoadQueuedCallback = [];
}
module.exports = ISound;
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.init = function () { /* virtual function */ };
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.setId = function (value) {
this.id = value;
this._loaded = false;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.setVolume = function (value) {
this.volume = value;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.setPan = function (value) {
this.pan = value;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.setLoop = function (value) {
this.loop = value;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
ISound.prototype.setPitch = function (pitch) {
this.pitch = pitch;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Load sound. Abstract method to be overwritten
* @private
*/
ISound.prototype._load = function () {
console.log('ISound load call: ' + this.id);
return this._finalizeLoad(null);
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Load sound
*
* @param {Function} [cd] - optional callback function
*/
ISound.prototype.load = function (cb) {
if (!this.id) return cb && cb('noId');
if (this._loaded) return cb && cb(null, this);
if (cb) { this._onLoadQueuedCallback.push(cb); }
if (this._loading) return;
this._loading = true;
return this._load();
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Finalize sound loading
*
* @param {String} error - set when loading has failed
*/
ISound.prototype._finalizeLoad = function (error) {
var maxPlayLatency = this.audioManager.settings.maxPlayLatency;
this._loaded = !error;
this._loading = false;
for (var i = 0; i < this._onLoadQueuedCallback.length; i++) {
this._onLoadQueuedCallback[i](error, this);
}
this._onLoadQueuedCallback = [];
if (this._unloading) {
this._unloading = false;
this.unload();
return;
}
if (this._loaded && this._playTriggered) {
if (this.loop || Date.now() - this._playTriggered < maxPlayLatency) { this._play(); }
this._playTriggered = 0;
}
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Unload sound from memory */
ISound.prototype.unload = function () {
this._playTriggered = 0;
this.setLoop(false);
this.fade = 0;
this.pitch = 0;
this.stop();
if (this._loading) {
this._unloading = true;
return false;
}
this.audioManager.usedMemory -= this.usedMemory;
this.setVolume(1.0);
this.setPan(0.0);
this.id = null;
this._loaded = false;
this.usedMemory = 0;
return true;
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Remove callback set on load */
ISound.prototype.cancelOnLoadCallbacks = function () {
this._onLoadQueuedCallback = [];
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Play sound. If sound is not yet loaded, it is loaded in memory and flagged to be played
* once loading has finished. If loading take too much time, playback may be cancelled.
*
* @param {number} [vol] - optional volume
* @param {number} [pan] - optional panoramic
* @param {number} [pitch] - optional pitch value in semi-tone (available only if using webAudio)
*/
ISound.prototype.play = function (vol, pan, pitch) {
if (vol !== undefined && vol !== null) { this.setVolume(vol); }
if (pan !== undefined && pan !== null) { this.setPan(pan); }
if (!this._loaded) {
this._playTriggered = Date.now();
this.load();
return;
}
this._play(pitch);
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Play sound. Abstract method to be overwritten */
ISound.prototype._play = function () {
this.playing = true;
console.log('ISound play call: "' + this.id + '"');
};
//▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄
/** Stop sound
*
* @param {Function} [cb] - optional callback function (use it when sound has a fade out)
*/
ISound.prototype.stop = function (cb) {
this.playing = false;
return cb && cb();
};