import { VzMediaElement } from '../core/media-element.js';
/**
 * <vz-cinema> - Virtual cinema: flat video on a screen inside a panoramic room.
 *
 * @example
 * ```html
 * <vz-cinema
 *   room-src="cinema-room.jpg"
 *   screen-width="3"
 *   screen-height="1.8"
 *   screen-distance="2.5"
 *   style="width:100%; aspect-ratio:16/9"
 * >
 *   <source src="movie.mp4" type="video/mp4" />
 * </vz-cinema>
 * ```
 */
export declare class VzCinemaElement extends VzMediaElement {
    private cinemaProjection;
    private videoDataReady;
    /** Guard so the projection (cinema or flat fallback) is only built once. */
    private projectionSetup;
    static get observedAttributes(): string[];
    protected onMediaConnected(): void;
    /**
     * Cinema is a paid feature. The base class runs its own gates (format, webxr,
     * spatial audio) here; we add the cinema gate and (re)attempt projection
     * setup now that the license is known.
     */
    protected onLicenseResolved(): void;
    /**
     * Build the projection once BOTH the video data is ready AND the license has
     * resolved. Licensed → the cinema room projection. Unlicensed → graceful
     * downgrade to flat (mono) playback of the same clip.
     */
    private maybeSetupProjection;
    /**
     * Graceful downgrade when the tier lacks cinema: render the clip as an
     * ordinary flat video instead of projecting it onto a screen inside a room.
     */
    private setupFlatFallback;
    protected onMediaDisconnected(): void;
    private setupCinemaProjection;
    private getNumAttr;
}
/** Register the <vz-cinema> custom element */
export declare function registerCinema(): void;
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