mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 16:48:00 +00:00
102 lines
2.4 KiB
JavaScript
102 lines
2.4 KiB
JavaScript
define(["Tone/core/Tone", "Tone/signal/Signal", "Tone/signal/Expr", "Tone/signal/EqualPowerGain"], function(Tone){
|
|
|
|
"use strict";
|
|
|
|
/**
|
|
* @class Equal power fading control values:<br>
|
|
* 0 = 100% input 0<br>
|
|
* 1 = 100% input 1<br>
|
|
*
|
|
* @constructor
|
|
* @extends {Tone}
|
|
* @param {number} [initialFade=0.5]
|
|
* @example
|
|
* var crossFade = new Tone.CrossFade(0.5);
|
|
* effectA.connect(crossFade, 0, 0);
|
|
* effectB.connect(crossFade, 0, 1);
|
|
* crossFade.fade.value = 0;
|
|
* // ^ only effectA is output
|
|
* crossFade.fade.value = 1;
|
|
* // ^ only effectB is output
|
|
* crossFade.fade.value = 0.5;
|
|
* // ^ the two signals are mixed equally.
|
|
*/
|
|
Tone.CrossFade = function(initialFade){
|
|
|
|
Tone.call(this, 2, 1);
|
|
|
|
/**
|
|
* the first input. input "a".
|
|
* @type {GainNode}
|
|
*/
|
|
this.a = this.input[0] = this.context.createGain();
|
|
|
|
/**
|
|
* the second input. input "b"
|
|
* @type {GainNode}
|
|
*/
|
|
this.b = this.input[1] = this.context.createGain();
|
|
|
|
/**
|
|
* 0 is 100% signal `a` (input 0) and 1 is 100% signal `b` (input 1).
|
|
* Values between 0-1.
|
|
*
|
|
* @type {Tone.Signal}
|
|
*/
|
|
this.fade = new Tone.Signal(this.defaultArg(initialFade, 0.5), Tone.Signal.Units.Normal);
|
|
|
|
/**
|
|
* equal power gain cross fade
|
|
* @private
|
|
* @type {Tone.EqualPowerGain}
|
|
*/
|
|
this._equalPowerA = new Tone.EqualPowerGain();
|
|
|
|
/**
|
|
* equal power gain cross fade
|
|
* @private
|
|
* @type {Tone.EqualPowerGain}
|
|
*/
|
|
this._equalPowerB = new Tone.EqualPowerGain();
|
|
|
|
/**
|
|
* invert the incoming signal
|
|
* @private
|
|
* @type {Tone}
|
|
*/
|
|
this._invert = new Tone.Expr("1 - $0");
|
|
|
|
//connections
|
|
this.a.connect(this.output);
|
|
this.b.connect(this.output);
|
|
this.fade.chain(this._equalPowerB, this.b.gain);
|
|
this.fade.chain(this._invert, this._equalPowerA, this.a.gain);
|
|
this._readOnly("fade");
|
|
};
|
|
|
|
Tone.extend(Tone.CrossFade);
|
|
|
|
/**
|
|
* clean up
|
|
* @returns {Tone.CrossFade} `this`
|
|
*/
|
|
Tone.CrossFade.prototype.dispose = function(){
|
|
Tone.prototype.dispose.call(this);
|
|
this._writable("fade");
|
|
this._equalPowerA.dispose();
|
|
this._equalPowerA = null;
|
|
this._equalPowerB.dispose();
|
|
this._equalPowerB = null;
|
|
this.fade.dispose();
|
|
this.fade = null;
|
|
this._invert.dispose();
|
|
this._invert = null;
|
|
this.a.disconnect();
|
|
this.a = null;
|
|
this.b.disconnect();
|
|
this.b = null;
|
|
return this;
|
|
};
|
|
|
|
return Tone.CrossFade;
|
|
});
|