import { ProctoringSessionOptions } from "../../proctoring/options/ProctoringOptions";
import { ProctoringVideoOptions } from "../../proctoring/options/ProctoringVideoOptions";
import { ProctoringContext } from "../../proctoring/proctoring";
export interface checkDevicesReturn {
    cameraId?: string;
    microphoneId?: string;
    volumeRange?: number;
    allowedResolution?: boolean;
    allowedAmbient?: boolean;
    allowedPositionFace?: boolean;
    allowedMicrophone?: boolean;
    allowedSpyScan?: boolean | null;
    result: boolean;
    faceDetectionAlerts?: {
        status: string;
        description: string;
    };
}
export declare class DeviceCheckerService {
    private deviceCheckResult;
    private static isModalOpen;
    private options;
    private videoOptions;
    private cameraRecorder;
    private DeviceCheckerUI;
    private volumeMeter;
    private volumeMedia;
    private volumeSum;
    private volumeCounter;
    private faceDetection;
    private faceDetectionAlerts;
    private microphoneMinThreshold;
    private allowedResolution;
    private allowedAmbient;
    private allowedPositionFace;
    private allowedMicrophone;
    private allowedSpyScan;
    private readonly backend;
    private readonly context;
    private noiseLimit;
    private onUpdateCb;
    private spycam;
    private spydevices;
    constructor(context: ProctoringContext);
    getDeviceCheckResult(): any;
    runCheckDevicesFlow(options: ProctoringSessionOptions, _videoOptions: Partial<ProctoringVideoOptions>, onModalConfirm: (resolve: (cameraId: string, microphoneId: string) => void) => void, onModalCancel: (reject: (error: Error) => void) => void, onUpdate: (feedback: any) => void): Promise<any>;
    private onUpdateCallback;
    checkDevices(options?: ProctoringSessionOptions, _videoOptions?: ProctoringVideoOptions): Promise<checkDevicesReturn>;
    private isUnderResolution;
    private realtimeAlerts;
    private videoDeviceInterface;
    private audioDeviceInterface;
    changeSelectedDevice({ cameraId, microphoneId }: any): Promise<{
        cameraStream: MediaStream;
    }>;
    startCheckDevices(options: ProctoringSessionOptions | undefined, _videoOptions: Partial<ProctoringVideoOptions>): Promise<{
        cameraStream: MediaStream;
    }>;
    closeCheckDevices(): Promise<void>;
    private checkSpyScan;
}