tone/build/esm/core/util/TimelineValue.js

A Web Audio framework for making interactive music in the browser.

import { Timeline } from "./Timeline.js";
import { Tone } from "../Tone.js";
/**
 * Represents a single value which is gettable and settable in a timed way
 */
export class TimelineValue extends Tone {
    /**
     * @param initialValue The value to return if there is no scheduled values
     */
    constructor(initialValue) {
        super();
        this.name = "TimelineValue";
        /**
         * The timeline which stores the values
         */
        this._timeline = new Timeline({
            memory: 10,
        });
        this._initialValue = initialValue;
    }
    /**
     * Set the value at the given time
     */
    set(value, time) {
        this._timeline.add({
            value,
            time,
        });
        return this;
    }
    /**
     * Get the value at the given time
     */
    get(time) {
        const event = this._timeline.get(time);
        if (event) {
            return event.value;
        }
        else {
            return this._initialValue;
        }
    }
}
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