import type Hls from 'hls.js';
import type { ErrorData, Events as HlsEvent, HlsConfig, LevelLoadedData } from 'hls.js';
import { type PropertyValues } from 'lit';
import { CanPlay, MediaType } from '../../media';
import { VideoElement } from '../video';
import type { DynamicHlsConstructorImport, HlsConstructor } from './types';
export declare const HLS_EXTENSIONS: RegExp;
export declare const HLS_TYPES: Set<string>;
/**
 * Embeds video content into documents via the native `<video>` element. It may contain
 * one or more video sources, represented using the `src` attribute or the `<source>` element: the
 * browser will choose the most suitable one.
 *
 * In addition, this element introduces support for HLS streaming via the popular `hls.js` library.
 * HLS streaming is either [supported natively](https://caniuse.com/?search=hls) (generally
 * on iOS), or in environments that [support the Media Stream API](https://caniuse.com/?search=mediastream).
 *
 * 💡 This element contains the exact same interface as the `<video>` element. It re-dispatches
 * all the native events if needed, but prefer the `vds-*` variants (eg: `vds-play`) as they
 * iron out any browser issues. It also dispatches all the `hls.js` events.
 *
 * 💡 This element re-dispatches all `hls.js` events so you can listen for them through the
 * native DOM interface (eg: `addEventListener('vds-hls-media-attaching', ...)`).
 *
 * @tagname vds-hls
 * @slot - Used to pass in `<source>` and `<track>` elements to the underlying HTML5 media player.
 * @csspart media - The video element (`<video>`).
 * @csspart video - Alias for `media` part.
 * @events ./events.ts
 * @example
 * ```html
 * <vds-hls src="/media/index.m3u8" poster="/media/poster.png">
 *   <!-- Additional media resources here. -->
 * </vds-hls>
 * ```
 * @example
 * ```html
 * <vds-hls src="/media/index.m3u8" poster="/media/poster.png">
 *   <track default kind="subtitles" src="/media/subs/en.vtt" srclang="en" label="English" />
 * </vds-hls>
 * ```
 */
export declare class HlsElement extends VideoElement {
    protected _hlsEngine: Hls | undefined;
    protected _isHlsEngineAttached: boolean;
    constructor();
    /**
     * The `hls.js` configuration object.
     *
     * @link https://github.com/video-dev/hls.js/blob/master/docs/API.md#fine-tuning
     */
    hlsConfig: Partial<HlsConfig | undefined>;
    /**
     * The `hls.js` constructor (supports dynamic imports) or a URL of where it can be found.
     *
     * @default DEV: 'https://cdn.jsdelivr.net/npm/hls.js@^1.0.0/dist/hls.js'
     * @default PROD: 'https://cdn.jsdelivr.net/npm/hls.js@^1.0.0/dist/hls.min.js'
     */
    hlsLibrary: HlsConstructor | DynamicHlsConstructorImport | string | undefined;
    protected _Hls: HlsConstructor | undefined;
    /**
     * The `hls.js` constructor.
     */
    get Hls(): typeof Hls | undefined;
    /**
     * The current `hls.js` instance.
     */
    get hlsEngine(): Hls | undefined;
    /**
     * Whether the `hls.js` instance has mounted the `HtmlMediaElement`.
     *
     * @default false
     */
    get isHlsEngineAttached(): boolean;
    get currentSrc(): string;
    connectedCallback(): void;
    protected update(changedProperties: PropertyValues): Promise<void>;
    disconnectedCallback(): void;
    handleMediaCanLoad(): Promise<void>;
    canPlayType(type: string): CanPlay;
    /**
     * Whether HLS streaming is supported in this environment.
     */
    get isHlsSupported(): boolean;
    /**
     * Whether the current src is using HLS.
     *
     * @default false
     */
    get isHlsStream(): boolean;
    /**
     * Whether the browser natively supports HLS, mostly only true in Safari. Only call this method
     * after the provider has connected to the DOM (wait for `MediaProviderConnectEvent`).
     */
    get hasNativeHlsSupport(): boolean;
    /**
     * Whether native HLS support is available and whether it should be used. Generally defaults
     * to `false` as long as `window.MediaSource` is defined to enforce consistency by
     * using `hls.js` where ever possible.
     *
     * @default false
     */
    get shouldUseNativeHlsSupport(): boolean;
    /**
     * Notifies the `VideoElement` whether the `src` attribute should be set on the rendered
     * `<video>` element. If we're using `hls.js` we don't want to override the `blob`.
     */
    protected _shouldSetVideoSrcAttr(): boolean;
    /**
     * Attempts to preconnect to the `hls.js` remote source given via `hlsLibrary`. This is
     * assuming `hls.js` is not bundled and `hlsLibrary` is a URL string pointing to where it
     * can be found.
     */
    protected _preconnectToHlsLibDownload(): void;
    protected _buildHlsEngine(forceRebuild?: boolean): Promise<void>;
    protected _destroyHlsEngine(): void;
    protected _prevHlsEngineSrc: string;
    protected _willAnotherEngineAttach(): boolean;
    protected _attachHlsEngine(): void;
    protected _detachHlsEngine(): void;
    protected _loadSrcOnHlsEngine(): void;
    protected _getMediaType(): MediaType;
    protected get _mediaReadyOnMetadataLoad(): boolean;
    protected _handleMediaSrcChange(): Promise<void>;
    protected _listenToHlsEngine(): void;
    protected _handleHlsError(eventType: string, data: ErrorData): void;
    protected _handleHlsNetworkError(): void;
    protected _handleHlsMediaError(): void;
    protected _handleHlsIrrecoverableError(): void;
    protected _handleHlsLevelLoaded(eventType: string, data: LevelLoadedData): void;
    protected _handleHlsMediaReady(eventType: string, data: LevelLoadedData): void;
    protected _hlsEventListeners: {
        listener: () => void;
        type: HlsEvent;
        options?: AddEventListenerOptions & {
            context: any;
        };
    }[];
    addEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, options?: boolean | (AddEventListenerOptions & {
        context: any;
    })): void;
    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | (AddEventListenerOptions & {
        context: any;
    })): void;
    removeEventListener<K extends keyof HTMLElementEventMap>(type: K, listener: (this: HTMLElement, ev: HTMLElementEventMap[K]) => any, options?: boolean | EventListenerOptions): void;
    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
}
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