import { ICameraService, CameraInfo } from './interfaces/ICameraService';
import { IEventBus } from './interfaces/IEventBus';
export declare class CameraService implements ICameraService {
    private eventBus;
    private availableCameras;
    private selectedCameraId;
    private deviceType;
    private preferredCameraFacing;
    private preferredCamera;
    private static cameraCapabilitiesCache;
    private static deviceEnumerationCache;
    private static readonly CACHE_DURATION;
    private currentStreamPromise?;
    private lastStreamConstraints?;
    constructor(eventBus: IEventBus, preferredCamera?: 'auto' | 'front' | 'back');
    detectDeviceType(): Promise<'mobile' | 'desktop' | 'tablet'>;
    enumerateDevices(): Promise<MediaDeviceInfo[]>;
    getAvailableCameras(): MediaDeviceInfo[];
    isMultipleCamerasAvailable(): boolean;
    getSelectedCameraId(): string | null;
    setSelectedCamera(cameraId: string): Promise<void>;
    getPreferredFacing(): 'environment' | 'user' | null;
    setupCamera(constraints?: MediaTrackConstraints): Promise<MediaStream>;
    switchCamera(cameraId: string): Promise<void>;
    isRearCamera(stream: MediaStream): boolean;
    getCameraInfo(): Promise<{
        availableCameras: CameraInfo[];
        selectedCameraId: string | null;
        deviceType: string;
        isMultipleCamerasAvailable: boolean;
        preferredFacing: 'environment' | 'user' | null;
    }>;
    private checkCameraPermission;
    private handleCameraPermissionError;
    private setInitialCameraPreference;
    private checkCameraAutofocus;
    private selectFrontCamera;
    private selectBackCamera;
    private selectAutoCamera;
    private updatePreferredFacing;
    private getMaxResolution;
    private constraintsEqual;
    static clearCaches(): void;
    invalidateDeviceCache(): void;
    private isVirtualCamera;
}