import { WebCameraCore } from "./webcam-core";
/**
 * This will open default user facing camera
 * Feature
 * - flip left/right as an option in flipImage
 */
export default class UserWebCamera extends WebCameraCore {
    protected _flipImage: boolean;
    /**
     * Opend default user facing camera
     * @param webcamElement
     * @param flipImage Flip left-right
     * @param canvasElement
     * @param snapSoundElement
     */
    constructor(webcamElement: HTMLVideoElement, flipImage?: boolean, canvasElement?: HTMLCanvasElement | null, snapSoundElement?: HTMLAudioElement | null);
    /**
    * Start Web Camera
    * @returns
    */
    start(): Promise<void>;
    /**
     * This will try to mount media to webcamElement and will automatically
     * change index number to find the next working media, if it cannot open specific media at provided index.
     * It will stop finding next media then throw error if no media can be mount.
     *
     * @param index Index of media to run in webcamList array
     * @param remountIndex internal use only
     */
    protected mountWebCam(): Promise<void>;
    protected getUserFacingMediaConstraints(): MediaStreamConstraints;
    /**
     * Flip context left to right before drawing to canvas
     * @param context
     */
    protected beforeSnapContext(context: CanvasRenderingContext2D): void;
}