export declare type FacingMode = 'user' | 'environment' | 'left' | 'right' | 'any';
/**
 * Core Web Camera
 * This will handle HTMLElement
 */
export declare class WebCameraCore {
    protected _webcamElement: HTMLVideoElement;
    protected _facingMode: FacingMode;
    protected _webcamList: MediaDeviceInfo[];
    protected _cameraInit: boolean;
    protected _cameraHasLabel: boolean;
    protected _canvasElement: HTMLCanvasElement | null;
    protected _snapSoundElement: HTMLAudioElement;
    protected _currentStream: MediaStream;
    protected _dubuggerFunction: (message: string) => any;
    constructor(webcamElement: HTMLVideoElement, facingMode: FacingMode, canvasElement?: HTMLCanvasElement | null, snapSoundElement?: HTMLAudioElement | null);
    get facingMode(): FacingMode;
    set facingMode(value: FacingMode);
    protected debug(message: any, ...optionalParams: any[]): void;
    dispose(): void;
    unBindingDebugger(): void;
    bindDebugger(binder: (message: string) => any): void;
    protected stopSingleStream(stream: MediaStream): void;
    start(): Promise<void>;
    stop(): void;
    protected beforeSnapContext(context: CanvasRenderingContext2D): void;
    snap(megapixel?: number): string;
}