Tone.js/Tone/component/analysis/MeterBase.ts

import { InputNode, OutputNode, ToneAudioNode, ToneAudioNodeOptions } from "../../core/context/ToneAudioNode";
import { optionsFromArguments } from "../../core/util/Defaults";
import { Analyser } from "./Analyser";

export type MeterBaseOptions = ToneAudioNodeOptions;

/**
 * The base class for Metering classes.
 */
export class MeterBase<Options extends MeterBaseOptions> extends ToneAudioNode<Options> {

	readonly name: string = "MeterBase";

	/**
	 * The signal to be analysed
	 */
	input: InputNode;

	/**
	 * The output is just a pass through of the input
	 */
	output: OutputNode;

	/**
	 * The analyser node for the incoming signal
	 */
	protected _analyser: Analyser;

	constructor(options?: Partial<MeterBaseOptions>);
	constructor() {
		super(optionsFromArguments(MeterBase.getDefaults(), arguments));

		this.input = this.output = this._analyser = new Analyser({
			context: this.context,
			size: 256,
			type: "waveform",
		});
	}

	dispose(): this {
		super.dispose();
		this._analyser.dispose();
		return this;
	}
}