import { CamOrientation } from './webcam.types';
/**
 * Manage webcam functions
 */
export declare class Webcam {
  private mWebcamElement;
  private mFacingMode;
  private mWebcamList;
  private mStreamList;
  private mSelectedDeviceId;
  private mCanvasElement;
  private mSnapSoundElement;
  static instance: Webcam;
  private constructor();
  /**
   * Get the Webcam instance
   */
  static getInstance(): Webcam;
  /**
   * Initialize the Webcam instace
   * @param webcamElement
   * @param facingMode
   * @param canvasElement
   * @param snapSoundElement
   */
  static init(webcamElement: HTMLVideoElement, facingMode?: CamOrientation, canvasElement?: HTMLCanvasElement, snapSoundElement?: HTMLAudioElement): Webcam;
  get facingMode(): CamOrientation;
  set facingMode(value: CamOrientation);
  get webcamList(): MediaDeviceInfo[];
  get webcamCount(): number;
  get selectedDeviceId(): string;
  /**
   * Get all video input devices info
   * @param mediaDevices
   */
  getVideoInputs(mediaDevices: MediaDeviceInfo[]): MediaDeviceInfo[];
  /**
   * Get media constraints
   */
  getMediaConstraints(): MediaStreamConstraints;
  /**
   * Select camera based on facingMode
   */
  selectCamera(isFlip?: boolean): void;
  /**
   * Change Facing mode and selected camera
   */
  flip(): void;
  /**
   * Invert the webcam video vertically
   */
  transform(): void;
  /**
   * 1. Get permission from user
   * 2. Get all video input devices info
   * 3. Select camera based on facingMode
   * 4. Start stream
   * @param startStream
   */
  start(startStream?: boolean): Promise<string>;
  /**
   * Restart the Webcam
   * 1. Stop the webcam
   * 2. Start stream
   * @param startStream
   */
  restart(startStream?: boolean): Promise<string>;
  /**
   * Get all video input devices info
   */
  info(): Promise<MediaDeviceInfo[]>;
  /**
   * Start streaming webcam to video element
   */
  stream(): Promise<CamOrientation>;
  /**
   * Stop streaming webcam
   */
  stop(): void;
  /**
   * Take the picture
   */
  snap(): string;
}