import { AgoraObservable } from 'agora-foundation/lib/utilities/observable';
import { ILocalVideoTrack } from 'agora-rtc-sdk-ng';
import { AgoraRteBeautyOptions, AgoraRteCameraCaptureParams, AgoraRteVirtualBackgroundOptions } from '../../../../core/media/type';
import { AgoraRtcVideoCanvas } from '../../../../core/rtc';
import { AgoraRtcCameraPosition } from '../../../../core/rtc/type';
import { AgoraEffectState, AgoraRtcLocalTrackEventsObserver, AgoraWebRtcExtensionDelegate } from '../type';
export declare class AgoraRtcCameraControl {
    private _deviceId;
    private _localTrackObservable;
    private _extensionDelegate;
    private _effectState;
    private _captureParamsPreset?;
    private static readonly _DEFAULT_TRACK_KEY_;
    protected logger: import("agora-foundation/lib/logger").Logger;
    private _isCameraStarted;
    private _isDeviceStarting;
    private _isDeviceTesting;
    private _cameraPosition;
    private _cameraTracks;
    private _videoCanvases;
    private _videoContexts;
    private _captureParams?;
    private _isProcessing;
    private _currentFacingMode?;
    private _canvasToReplay;
    private _shouldRecreateCloneTracks;
    constructor(_deviceId: string, _localTrackObservable: AgoraObservable<AgoraRtcLocalTrackEventsObserver>, _extensionDelegate: AgoraWebRtcExtensionDelegate, _effectState: AgoraEffectState, _captureParamsPreset?: AgoraRteCameraCaptureParams | undefined);
    release(): number;
    get videoTrack(): ILocalVideoTrack | undefined;
    get deviceId(): string;
    get isStarted(): boolean;
    start(): void;
    stop(): void;
    startTest(): void;
    stopTest(): void;
    setCameraPosition(position: AgoraRtcCameraPosition): void;
    addVideoCanvas(canvas: AgoraRtcVideoCanvas): void;
    removeVideoCanvas(canvas: AgoraRtcVideoCanvas): void;
    takeSnapshot(): ImageData;
    setBeautyOptions(options: AgoraRteBeautyOptions): number;
    enableBeauty(): number;
    disableBeauty(): number;
    setVirtualBackgroundOptions(options: AgoraRteVirtualBackgroundOptions): number;
    enableVirtualBackground(): number;
    disableVirtualBackground(): number;
    setCameraCaptureParams(params: AgoraRteCameraCaptureParams): number;
    private _getFacingMode;
    private _getRenderMode;
    private _getEncoderConfig;
    private _isStateStale;
    private _syncState;
    private _deleteContext;
}