import { HMSMediaStreamPlugin } from '@100mslive/hms-video-store';
export declare type HMSEffectsBackground = string | MediaStream | MediaStreamTrack | HTMLVideoElement;
export declare class HMSEffectsPlugin implements HMSMediaStreamPlugin {
    private effects;
    private blurAmount;
    private background?;
    private backgroundType;
    private preset;
    private initPromise;
    private resolveInit;
    private onInit;
    private onResolutionChangeCallback?;
    private TAG;
    private operationQueue;
    private effectRequestId;
    constructor(effectsSDKKey: string, onInit?: () => void);
    getName(): string;
    isSupported(): boolean;
    private enqueueOperation;
    removeBlur(): void;
    removeBackground(): void;
    /**
     * @param blur ranges between 0 and 1
     */
    setBlur(blur: number): void;
    /**
     * @param preset can be 'quality' or 'balanced'. The 'quality' preset has better quality but higher CPU usage than 'balanced'
     */
    setPreset(preset: 'quality' | 'balanced'): Promise<unknown>;
    onResolutionChange(callback: (width: number, height: number) => void): void;
    getPreset(): "balanced" | "quality" | "lightning";
    removeEffects(): void;
    setBackground(url: HMSEffectsBackground): void;
    getBlurAmount(): number;
    getBackground(): string | HTMLVideoElement | MediaStream | MediaStreamTrack;
    /**
     * Get performance metrics from the effects SDK
     * @returns metrics object with fps, processing time, etc.
     */
    getMetrics(): import("effects-sdk/types/tsvb").Metrics;
    apply(stream: MediaStream): MediaStream;
    stop(): void;
    private applyEffect;
}