import type { QualityLevel } from '@vizor-vr/shared';
import type { IStreamingAdapter, DrmContext } from './types.js';
/**
 * Progressive MP4/WebM adapter.
 * Sets the video source directly — no adaptive bitrate.
 */
export declare class ProgressiveAdapter implements IStreamingAdapter {
    private videoElement;
    private _isAttached;
    get supportsABR(): boolean;
    get isAttached(): boolean;
    attach(videoElement: HTMLVideoElement): void;
    load(url: string, _drm?: DrmContext): void;
    getQualityLevels(): QualityLevel[];
    setQualityLevel(_index: number): void;
    destroy(): void;
}
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