mirror of
https://github.com/Tonejs/Tone.js
synced 2024-12-29 13:03:06 +00:00
112 lines
3 KiB
TypeScript
112 lines
3 KiB
TypeScript
import { MidSideEffect, MidSideEffectOptions } from "../effect/MidSideEffect";
|
|
import { Signal } from "../signal/Signal";
|
|
import { Multiply } from "../signal/Multiply";
|
|
import { Subtract } from "../signal/Subtract";
|
|
import { NormalRange } from "../core/type/Units";
|
|
import { optionsFromArguments } from "../core/util/Defaults";
|
|
import { readOnly } from "../core/util/Interface";
|
|
import { connect } from "../core/context/ToneAudioNode";
|
|
|
|
export interface StereoWidenerOptions extends MidSideEffectOptions {
|
|
width: NormalRange;
|
|
}
|
|
|
|
/**
|
|
* Applies a width factor to the mid/side seperation.
|
|
* 0 is all mid and 1 is all side.
|
|
* Algorithm found in [kvraudio forums](http://www.kvraudio.com/forum/viewtopic.php?t=212587).
|
|
* ```
|
|
* Mid *= 2*(1-width)<br>
|
|
* Side *= 2*width
|
|
* ```
|
|
* @category Effect
|
|
*/
|
|
export class StereoWidener extends MidSideEffect<StereoWidenerOptions> {
|
|
|
|
readonly name: string = "StereoWidener";
|
|
|
|
/**
|
|
* The width control. 0 = 100% mid. 1 = 100% side. 0.5 = no change.
|
|
*/
|
|
readonly width: Signal<"normalRange">;
|
|
|
|
/**
|
|
* Two times the (1-width) for the mid channel
|
|
*/
|
|
private _twoTimesWidthMid: Multiply;
|
|
|
|
/**
|
|
* Two times the width for the side channel
|
|
*/
|
|
private _twoTimesWidthSide: Multiply;
|
|
|
|
/**
|
|
* Mid multiplier
|
|
*/
|
|
private _midMult: Multiply;
|
|
|
|
/**
|
|
* 1 - width
|
|
*/
|
|
private _oneMinusWidth: Subtract;
|
|
|
|
/**
|
|
* Side multiplier
|
|
*/
|
|
private _sideMult: Multiply;
|
|
|
|
/**
|
|
* @param width The stereo width. A width of 0 is mono and 1 is stereo. 0.5 is no change.
|
|
*/
|
|
constructor(width?: NormalRange);
|
|
constructor(options?: Partial<StereoWidenerOptions>);
|
|
constructor() {
|
|
|
|
super(optionsFromArguments(StereoWidener.getDefaults(), arguments, ["width"]));
|
|
const options = optionsFromArguments(StereoWidener.getDefaults(), arguments, ["width"]);
|
|
this.width = new Signal({
|
|
context: this.context,
|
|
value: options.width,
|
|
units: "normalRange",
|
|
});
|
|
readOnly(this, ["width"]);
|
|
this._twoTimesWidthMid = new Multiply({
|
|
context: this.context,
|
|
value: 2,
|
|
});
|
|
this._twoTimesWidthSide = new Multiply({
|
|
context: this.context,
|
|
value: 2,
|
|
});
|
|
this._midMult = new Multiply({ context: this.context });
|
|
this._twoTimesWidthMid.connect(this._midMult.factor);
|
|
this.connectEffectMid(this._midMult);
|
|
|
|
this._oneMinusWidth = new Subtract({ context: this.context });
|
|
this._oneMinusWidth.connect(this._twoTimesWidthMid);
|
|
connect(this.context.getConstant(1), this._oneMinusWidth);
|
|
this.width.connect(this._oneMinusWidth.subtrahend);
|
|
|
|
this._sideMult = new Multiply({ context: this.context });
|
|
this.width.connect(this._twoTimesWidthSide);
|
|
this._twoTimesWidthSide.connect(this._sideMult.factor);
|
|
this.connectEffectSide(this._sideMult);
|
|
}
|
|
|
|
static getDefaults(): StereoWidenerOptions {
|
|
return Object.assign(MidSideEffect.getDefaults(), {
|
|
width: 0.5,
|
|
});
|
|
}
|
|
|
|
dispose(): this {
|
|
super.dispose();
|
|
this.width.dispose();
|
|
this._midMult.dispose();
|
|
this._sideMult.dispose();
|
|
this._twoTimesWidthMid.dispose();
|
|
this._twoTimesWidthSide.dispose();
|
|
this._oneMinusWidth.dispose();
|
|
return this;
|
|
}
|
|
}
|