mirror of
https://github.com/Tonejs/Tone.js
synced 2024-11-16 00:27:58 +00:00
ed71d8141b
no longer using AMD (require.js) style imports, and beginning to move to es6 "import/export" statements everywhere.
110 lines
2.2 KiB
JavaScript
110 lines
2.2 KiB
JavaScript
import Tone from "../core/Tone";
|
|
import "../signal/Add";
|
|
import "../signal/Multiply";
|
|
|
|
/**
|
|
* @class Normalize takes an input min and max and maps it linearly to NormalRange [0,1]
|
|
*
|
|
* @extends {Tone.SignalBase}
|
|
* @constructor
|
|
* @param {number} inputMin the min input value
|
|
* @param {number} inputMax the max input value
|
|
* @example
|
|
* var norm = new Tone.Normalize(2, 4);
|
|
* var sig = new Tone.Signal(3).connect(norm);
|
|
* //output of norm is 0.5.
|
|
*/
|
|
Tone.Normalize = function(inputMin, inputMax){
|
|
|
|
Tone.SignalBase.call(this);
|
|
|
|
/**
|
|
* the min input value
|
|
* @type {number}
|
|
* @private
|
|
*/
|
|
this._inputMin = Tone.defaultArg(inputMin, 0);
|
|
|
|
/**
|
|
* the max input value
|
|
* @type {number}
|
|
* @private
|
|
*/
|
|
this._inputMax = Tone.defaultArg(inputMax, 1);
|
|
|
|
/**
|
|
* subtract the min from the input
|
|
* @type {Tone.Add}
|
|
* @private
|
|
*/
|
|
this._sub = this.input = new Tone.Add(0);
|
|
|
|
/**
|
|
* divide by the difference between the input and output
|
|
* @type {Tone.Multiply}
|
|
* @private
|
|
*/
|
|
this._div = this.output = new Tone.Multiply(1);
|
|
|
|
this._sub.connect(this._div);
|
|
this._setRange();
|
|
};
|
|
|
|
Tone.extend(Tone.Normalize, Tone.SignalBase);
|
|
|
|
/**
|
|
* The minimum value the input signal will reach.
|
|
* @memberOf Tone.Normalize#
|
|
* @type {number}
|
|
* @name min
|
|
*/
|
|
Object.defineProperty(Tone.Normalize.prototype, "min", {
|
|
get : function(){
|
|
return this._inputMin;
|
|
},
|
|
set : function(min){
|
|
this._inputMin = min;
|
|
this._setRange();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* The maximum value the input signal will reach.
|
|
* @memberOf Tone.Normalize#
|
|
* @type {number}
|
|
* @name max
|
|
*/
|
|
Object.defineProperty(Tone.Normalize.prototype, "max", {
|
|
get : function(){
|
|
return this._inputMax;
|
|
},
|
|
set : function(max){
|
|
this._inputMax = max;
|
|
this._setRange();
|
|
}
|
|
});
|
|
|
|
/**
|
|
* set the values
|
|
* @private
|
|
*/
|
|
Tone.Normalize.prototype._setRange = function(){
|
|
this._sub.value = -this._inputMin;
|
|
this._div.value = 1 / (this._inputMax - this._inputMin);
|
|
};
|
|
|
|
/**
|
|
* clean up
|
|
* @returns {Tone.Normalize} this
|
|
*/
|
|
Tone.Normalize.prototype.dispose = function(){
|
|
Tone.SignalBase.prototype.dispose.call(this);
|
|
this._sub.dispose();
|
|
this._sub = null;
|
|
this._div.dispose();
|
|
this._div = null;
|
|
return this;
|
|
};
|
|
|
|
export default Tone.Normalize;
|
|
|