mirror of
https://github.com/Tonejs/Tone.js
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101 lines
3.1 KiB
TypeScript
101 lines
3.1 KiB
TypeScript
import { StereoEffect, StereoEffectOptions } from "./StereoEffect";
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import { NormalRange } from "../core/type/Units";
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import { Signal } from "../signal/Signal";
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import { Gain } from "../core/context/Gain";
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import { readOnly } from "../core/util/Interface";
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import { Split } from "../component/channel/Split";
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import { Merge } from "../component/channel/Merge";
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export interface StereoFeedbackEffectOptions extends StereoEffectOptions {
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feedback: NormalRange;
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}
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/**
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* Just like a stereo feedback effect, but the feedback is routed from left to right
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* and right to left instead of on the same channel.
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* ```
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* +--------------------------------+ feedbackL <-----------------------------------+
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* | |
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* +--> +-----> +----> +---+
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* feedbackMerge +--> split (EFFECT) merge +--> feedbackSplit
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* +--> +-----> +----> +---+
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* | |
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* +--------------------------------+ feedbackR <-----------------------------------+
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* ```
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*/
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export class StereoFeedbackEffect<Options extends StereoFeedbackEffectOptions> extends StereoEffect<Options> {
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/**
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* The amount of feedback from the output
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* back into the input of the effect (routed
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* across left and right channels).
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*/
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readonly feedback: Signal<"normalRange">;
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/**
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* the left side feedback
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*/
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protected _feedbackL: Gain;
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/**
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* the right side feedback
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*/
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protected _feedbackR: Gain;
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/**
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* Split the channels for feedback
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*/
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protected _feedbackSplit: Split;
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/**
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* Merge the channels for feedback
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*/
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protected _feedbackMerge: Merge;
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constructor(options: StereoFeedbackEffectOptions) {
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super(options);
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this.feedback = new Signal({
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context: this.context,
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value: options.feedback,
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units: "normalRange"
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});
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this._feedbackL = new Gain({ context: this.context });
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this._feedbackR = new Gain({ context: this.context });
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this._feedbackSplit = new Split({ context: this.context, channels: 2 });
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this._feedbackMerge = new Merge({ context: this.context, channels: 2 });
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this._merge.connect(this._feedbackSplit);
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this._feedbackMerge.connect(this._split);
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// the left output connected to the left input
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this._feedbackSplit.connect(this._feedbackL, 0, 0);
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this._feedbackL.connect(this._feedbackMerge, 0, 0);
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// the right output connected to the right input
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this._feedbackSplit.connect(this._feedbackR, 1, 0);
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this._feedbackR.connect(this._feedbackMerge, 0, 1);
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// the feedback control
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this.feedback.fan(this._feedbackL.gain, this._feedbackR.gain);
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readOnly(this, ["feedback"]);
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}
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static getDefaults(): StereoFeedbackEffectOptions {
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return Object.assign(StereoEffect.getDefaults(), {
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feedback: 0.5,
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});
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}
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dispose(): this {
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super.dispose();
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this.feedback.dispose();
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this._feedbackL.dispose();
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this._feedbackR.dispose();
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this._feedbackSplit.dispose();
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this._feedbackMerge.dispose();
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return this;
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}
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}
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