import { CameraOptions } from "./types/CameraOptions";
import { CaptureOptions } from "./types/CaptureOptions";
import { CaptureResult } from "./types/CaptureResult";
export declare class FaceVideo {
    private cameraManager;
    private photoManager;
    private onCameraStartedCallbacks;
    constructor(video: HTMLVideoElement);
    /**
     * Get all video input devices.
     */
    getDevices(): Promise<MediaDeviceInfo[]>;
    /**
     * Start video stream with optional deviceId.
     */
    start(options?: CameraOptions, deviceId?: string): Promise<void>;
    /**
     * Stop the video stream and clean up.
     */
    stop(): void;
    /**
     * Capture the current frame and return it as Blob.
     */
    capture(options: CaptureOptions): Promise<CaptureResult>;
    /**
     * Subscribe to the camera started event.
     */
    onCameraStarted(callback: () => void): void;
    /**
      * Unsubscribe from the camera started event.
      */
    offCameraStarted(callback: () => void): void;
    /**
     * Internal method to notify all subscribers.
     */
    private emitCameraStarted;
}