import { PositionalAudio } from "three";
import { Behaviour } from "./Component.js";
/**
 * The AudioRolloffMode enum describes different ways that audio can attenuate with distance.
 */
export declare enum AudioRolloffMode {
    Logarithmic = 0,
    Linear = 1,
    Custom = 2
}
/** The AudioSource can be used to play audio in the scene.
 * Use `clip` to set the audio file to play.
 * @category Multimedia
 * @group Components
 */
export declare class AudioSource extends Behaviour {
    /** Check if the user has interacted with the page to allow audio playback.
     * Internally calling {@link Application.userInteractionRegistered}
     */
    static get userInteractionRegistered(): boolean;
    /** Register a callback that is called when the user has interacted with the page to allow audio playback.
     * Internally calling {@link Application.registerWaitForInteraction}
     */
    static registerWaitForAllowAudio(cb: Function): void;
    /**
     * The audio clip to play. Can be a string (URL) or a MediaStream.
     */
    clip: string | MediaStream;
    /**
     * If true, the audio source will start playing as soon as the scene starts.
     * If false, you can call play() to start the audio.
     * @default false
    */
    playOnAwake: boolean;
    /**
     * If true, the audio source will start loading the audio clip as soon as the scene starts.
     * If false, the audio clip will be loaded when play() is called.
     * @default false
     */
    preload: boolean;
    /**
     * When true, the audio will play in the background. This means it will continue playing if the browser tab is not focused/active or minimized
     * @default true
     */
    playInBackground: boolean;
    /**
     * If true, the audio is currently playing.
     */
    get isPlaying(): boolean;
    /** The duration of the audio clip in seconds. */
    get duration(): number | undefined;
    /** The current time of the audio clip in 0-1 range. */
    get time01(): number;
    set time01(val: number);
    /**
     * The current time of the audio clip in seconds.
     */
    get time(): number;
    set time(val: number);
    /**
     * If true, the audio source will loop the audio clip.
     * If false, the audio clip will play once.
     * @default false
     */
    get loop(): boolean;
    set loop(val: boolean);
    /** Can be used to play the audio clip in 2D or 3D space.
     * 2D Playback is currently not fully supported.
     * 0 = 2D, 1 = 3D
     * */
    get spatialBlend(): number;
    set spatialBlend(val: number);
    get minDistance(): number;
    set minDistance(val: number);
    get maxDistance(): number;
    set maxDistance(val: number);
    private _spatialBlend;
    private _minDistance;
    private _maxDistance;
    get volume(): number;
    set volume(val: number);
    private _volume;
    set pitch(val: number);
    get pitch(): number;
    rollOffMode: AudioRolloffMode;
    private _loop;
    private sound;
    private helper;
    private wasPlaying;
    private audioLoader;
    private shouldPlay;
    private _lastClipStartedLoading;
    private _audioElement;
    get Sound(): PositionalAudio | null;
    get ShouldPlay(): boolean;
    /** Get the audio context from the Sound */
    get audioContext(): AudioContext | undefined;
    /** @internal */
    awake(): void;
    /** @internal */
    onEnable(): void;
    /** @internal */
    onDisable(): void;
    private onVisibilityChanged;
    private onApplicationMuteChanged;
    private createAudio;
    private __onAllowAudioCallback;
    private applySpatialDistanceSettings;
    private onNewClip;
    /** Play a audioclip or mediastream */
    play(clip?: string | MediaStream | undefined): void;
    /**
     * Pause the audio
     */
    pause(): void;
    /**
     * Stop the audio and reset the time to 0
     */
    stop(): void;
    private _lastContextTime;
    private _hasEnded;
    private _needUpdateSpatialDistanceSettings;
    /** @internal */
    update(): void;
}