/// <reference types="react" />
import * as Tone from 'tone';
import { OscilloscopeDataPoint } from '../main';
export interface UseOscilloscopeProps {
    fftSize?: number;
    onReady?: () => void;
    onError?: () => void;
}
/**
 * `useOscilloscope` is a custom React hook that integrates with Tone.js to create an oscilloscope.
 * It is designed to capture and display real-time waveform data from an audio source.
 *
 * @param {UseOscilloscopeProps} props - The configuration properties for the oscilloscope.
 * @param {number} [props.fftSize=1024] - The FFT size, must be a power of 2. Default is 1024.
 * @param {Function} props.onReady - Callback executed when the oscilloscope is ready.
 * @param {Function} props.onError - Callback executed in case of an error.
 *
 * @returns {object} An object containing various properties and methods for the oscilloscope:
 * - init: Method to initialize the oscilloscope.
 * - analyser: The Tone.Analyser instance used by the oscilloscope.
 * - data: The current waveform data captured by the oscilloscope.
 * - getData: Method to retrieve the current waveform data.
 * - observe: Method to start the data observation.
 * - cancelObserve: Method to stop the data observation.
 * - error: Boolean indicating if an error has occurred.
 * - errorMessage: The error message in case of an error.
 *
 * This hook can be useful in audio analysis applications, allowing for real-time visualization of waveform data.
 */
export declare const useOscilloscope: (props?: UseOscilloscopeProps) => {
    init: () => void;
    analyser: import("react").MutableRefObject<Tone.Analyser | null>;
    data: OscilloscopeDataPoint[];
    getData: () => void;
    observer: () => void;
    cancelObserve: () => void;
    error: boolean;
    errorMessage: string;
};