Tone.js/Tone/core/Delay.js

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define(["../core/Tone", "../core/Param", "../core/AudioNode"], function(Tone){
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"use strict";
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/**
* @class Wrapper around Web Audio's native [DelayNode](http://webaudio.github.io/web-audio-api/#the-delaynode-interface).
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* @extends {Tone}
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* @param {Time=} delayTime The delay applied to the incoming signal.
* @param {Time=} maxDelay The maximum delay time.
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*/
Tone.Delay = function(){
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var options = Tone.defaults(arguments, ["delayTime", "maxDelay"], Tone.Delay);
Tone.AudioNode.call(this, options);
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/**
* The maximum delay time initialized with the node
* @type {Number}
* @private
*/
this._maxDelay = Math.max(this.toSeconds(options.maxDelay), this.toSeconds(options.delayTime));
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/**
* The native delay node
* @type {DelayNode}
* @private
*/
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this._delayNode = this.input = this.output = this.context.createDelay(this._maxDelay);
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/**
* The amount of time the incoming signal is
* delayed.
* @type {Time}
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* @signal
*/
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this.delayTime = new Tone.Param({
"param" : this._delayNode.delayTime,
"units" : Tone.Type.Time,
"value" : options.delayTime
});
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this._readOnly("delayTime");
};
Tone.extend(Tone.Delay, Tone.AudioNode);
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/**
* The defaults
* @const
* @type {Object}
*/
Tone.Delay.defaults = {
"maxDelay" : 1,
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"delayTime" : 0
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};
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/**
* The maximum delay time. This cannot be changed. The value is passed into the constructor.
* @memberof Tone.Delay#
* @type {Time}
* @name maxDelay
* @readOnly
*/
Object.defineProperty(Tone.Delay.prototype, "maxDelay", {
get : function(){
return this._maxDelay;
}
});
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/**
* Clean up.
* @return {Tone.Delay} this
*/
Tone.Delay.prototype.dispose = function(){
Tone.AudioNode.prototype.dispose.call(this);
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this._delayNode.disconnect();
this._delayNode = null;
this._writable("delayTime");
this.delayTime = null;
return this;
};
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return Tone.Delay;
});