/*
 * Copyright (C) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { ErrorCallback, AsyncCallback } from './@ohos.base';
import type Context from './application/BaseContext';
import image from './@ohos.multimedia.image';

/**
 * @namespace camera
 * @syscap SystemCapability.Multimedia.Camera.Core
 * @since 10
 */
declare namespace camera {
  /**
   * Creates a CameraManager instance.
   *
   * @param { Context } context - Current application context.
   * @returns { CameraManager } CameraManager instance.
   * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
   * @throws { BusinessError } 7400201 - Camera service fatal error.
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  function getCameraManager(context: Context): CameraManager;

  /**
   * Enum for camera status.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum CameraStatus {
    /**
     * Appear status.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_STATUS_APPEAR = 0,
    /**
     * Disappear status.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_STATUS_DISAPPEAR = 1,
    /**
     * Available status.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_STATUS_AVAILABLE = 2,
    /**
     * Unavailable status.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_STATUS_UNAVAILABLE = 3
  }

  /**
   * Profile for camera streams.
   *
   * @typedef Profile
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface Profile {
    /**
     * Camera format.
     *
     * @type { CameraFormat }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly format: CameraFormat;
    /**
     * Picture size.
     *
     * @type { Size }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly size: Size;
  }

  /**
   * Frame rate range.
   *
   * @typedef FrameRateRange
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface FrameRateRange {
    /**
     * Min frame rate.
     *
     * @type { number }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly min: number;
    /**
     * Max frame rate.
     *
     * @type { number }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly max: number;
  }

  /**
   * Video profile.
   *
   * @typedef VideoProfile
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface VideoProfile extends Profile {
    /**
     * Frame rate in unit fps (frames per second).
     *
     * @type { FrameRateRange }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly frameRateRange: FrameRateRange;
  }

  /**
   * Camera output capability.
   *
   * @typedef CameraOutputCapability
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraOutputCapability {
    /**
     * Preview profiles.
     *
     * @type { Array<Profile> }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly previewProfiles: Array<Profile>;
    /**
     * Photo profiles.
     *
     * @type { Array<Profile> }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly photoProfiles: Array<Profile>;
    /**
     * Video profiles.
     *
     * @type { Array<VideoProfile> }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly videoProfiles: Array<VideoProfile>;
    /**
     * All the supported metadata Object Types.
     *
     * @type { Array<MetadataObjectType> }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly supportedMetadataObjectTypes: Array<MetadataObjectType>;
  }

  /**
   * Enum for camera error code.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum CameraErrorCode {
    /**
     * Parameter missing or parameter type incorrect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    INVALID_ARGUMENT = 7400101,
    /**
     * Operation not allowed.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    OPERATION_NOT_ALLOWED = 7400102,
    /**
     * Session not config.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    SESSION_NOT_CONFIG = 7400103,
    /**
     * Session not running.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    SESSION_NOT_RUNNING = 7400104,
    /**
     * Session config locked.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    SESSION_CONFIG_LOCKED = 7400105,
    /**
     * Device setting locked.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    DEVICE_SETTING_LOCKED = 7400106,
    /**
     * Can not use camera cause of conflict.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CONFLICT_CAMERA = 7400107,
    /**
     * Camera disabled cause of security reason.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    DEVICE_DISABLED = 7400108,
    /**
     * Can not use camera cause of preempted.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    DEVICE_PREEMPTED = 7400109,
    /**
     * Camera service fatal error.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    SERVICE_FATAL_ERROR = 7400201
  }

  /**
   * Prelaunch config object.
   *
   * @typedef PrelaunchConfig
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  interface PrelaunchConfig {
    /**
     * Camera instance.
     *
     * @type { CameraDevice }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    cameraDevice: CameraDevice;
  }

  /**
   * Camera manager object.
   *
   * @interface CameraManager
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraManager {
    /**
     * Gets supported camera descriptions.
     *
     * @returns { Array<CameraDevice> } An array of supported cameras.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getSupportedCameras(): Array<CameraDevice>;

    /**
     * Gets supported output capability for specific camera.
     *
     * @param { CameraDevice } camera - Camera device.
     * @returns { CameraOutputCapability } The camera output capability.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getSupportedOutputCapability(camera: CameraDevice): CameraOutputCapability;

    /**
     * Determine whether camera is muted.
     *
     * @returns { boolean } Is camera muted.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isCameraMuted(): boolean;

    /**
     * Determine whether camera mute is supported.
     *
     * @returns { boolean } Is camera mute supported.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    isCameraMuteSupported(): boolean;

    /**
     * Mute camera.
     *
     * @param { boolean } mute - Mute camera if TRUE, otherwise unmute camera.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    muteCamera(mute: boolean): void;

    /**
     * Creates a CameraInput instance by camera.
     *
     * @permission ohos.permission.CAMERA
     * @param { CameraDevice } camera - Camera device used to create the instance.
     * @returns { CameraInput } The CameraInput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createCameraInput(camera: CameraDevice): CameraInput;

    /**
     * Creates a CameraInput instance by camera position and type.
     *
     * @permission ohos.permission.CAMERA
     * @param { CameraPosition } position - Target camera position.
     * @param { CameraType } type - Target camera type.
     * @returns { CameraInput } The CameraInput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createCameraInput(position: CameraPosition, type: CameraType): CameraInput;

    /**
     * Creates a PreviewOutput instance.
     *
     * @param { Profile } profile - Preview output profile.
     * @param { string } surfaceId - Surface object id used in camera photo output.
     * @returns { PreviewOutput } The PreviewOutput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createPreviewOutput(profile: Profile, surfaceId: string): PreviewOutput;

    /**
     * Creates a PhotoOutput instance.
     *
     * @param { Profile } profile - Photo output profile.
     * @param { string } surfaceId - Surface object id used in camera photo output.
     * @returns { PhotoOutput } The PhotoOutput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createPhotoOutput(profile: Profile, surfaceId: string): PhotoOutput;

    /**
     * Creates a VideoOutput instance.
     *
     * @param { VideoProfile } profile - Video profile.
     * @param { string } surfaceId - Surface object id used in camera video output.
     * @returns { VideoOutput } The VideoOutput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createVideoOutput(profile: VideoProfile, surfaceId: string): VideoOutput;

    /**
     * Creates a MetadataOutput instance.
     *
     * @param { Array<MetadataObjectType> } metadataObjectTypes - Array of MetadataObjectType.
     * @returns { MetadataOutput } The MetadataOutput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createMetadataOutput(metadataObjectTypes: Array<MetadataObjectType>): MetadataOutput;

    /**
     * Gets a CaptureSession instance.
     *
     * @returns { CaptureSession } The CaptureSession instance.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    createCaptureSession(): CaptureSession;

    /**
     * Subscribes camera status change event callback.
     *
     * @param { 'cameraStatus' } type - Event type.
     * @param { AsyncCallback<CameraStatusInfo> } callback - Callback used to get the camera status change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'cameraStatus', callback: AsyncCallback<CameraStatusInfo>): void;

    /**
     * Unsubscribes from camera status change event callback.
     *
     * @param { 'cameraStatus' } type - Event type.
     * @param { AsyncCallback<CameraStatusInfo> } callback - Callback used to get the camera status change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'cameraStatus', callback?: AsyncCallback<CameraStatusInfo>): void;

    /**
     * Subscribes camera mute change event callback.
     *
     * @param { 'cameraMute' } type - Event type.
     * @param { AsyncCallback<boolean> } callback - Callback used to get the camera mute change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    on(type: 'cameraMute', callback: AsyncCallback<boolean>): void;

    /**
     * Unsubscribes from camera mute change event callback.
     *
     * @param { 'cameraMute' } type - Event type.
     * @param { AsyncCallback<boolean> } callback - Callback used to get the camera mute change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    off(type: 'cameraMute', callback?: AsyncCallback<boolean>): void;

    /**
     * Determines whether the camera device supports prelaunch.
     * This function must be called in prior to the setPrelaunchConfig and prelaunch functions.
     *
     * @param { CameraDevice } camera - Camera device.
     * @returns { boolean } Whether prelaunch is supported.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    isPrelaunchSupported(camera: CameraDevice): boolean;

    /**
     * Sets the camera prelaunch configuration.
     * The configuration is sent to the camera service when you exit the camera or change the configuration next time.
     *
     * @permission ohos.permission.CAMERA
     * @param { PrelaunchConfig } prelaunchConfig - Prelaunch configuration info.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    setPrelaunchConfig(prelaunchConfig: PrelaunchConfig): void;

    /**
     * Enable the camera to prelaunch and start.
     * This function is called when the user clicks the system camera icon to start the camera application.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    prelaunch(): void;

    /**
     * Creates a deferred PreviewOutput instance.
     *
     * @param { Profile } profile - Preview output profile.
     * @returns { PreviewOutput } the PreviewOutput instance.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    createDeferredPreviewOutput(profile: Profile): PreviewOutput;
  }

  /**
   * Camera status info.
   *
   * @typedef CameraStatusInfo
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraStatusInfo {
    /**
     * Camera instance.
     *
     * @type { CameraDevice }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    camera: CameraDevice;
    /**
     * Current camera status.
     *
     * @type { CameraStatus }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    status: CameraStatus;
  }

  /**
   * Enum for camera position.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum CameraPosition {
    /**
     * Unspecified position.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_POSITION_UNSPECIFIED = 0,
    /**
     * Back position.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_POSITION_BACK = 1,
    /**
     * Front position.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_POSITION_FRONT = 2
  }

  /**
   * Enum for camera type.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum CameraType {
    /**
     * Default camera type
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_TYPE_DEFAULT = 0,

    /**
     * Wide camera
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_TYPE_WIDE_ANGLE = 1,

    /**
     * Ultra wide camera
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_TYPE_ULTRA_WIDE = 2,

    /**
     * Telephoto camera
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_TYPE_TELEPHOTO = 3,

    /**
     * True depth camera
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_TYPE_TRUE_DEPTH = 4
  }

  /**
   * Enum for camera connection type.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum ConnectionType {
    /**
     * Built-in camera.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_CONNECTION_BUILT_IN = 0,

    /**
     * Camera connected using USB
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_CONNECTION_USB_PLUGIN = 1,

    /**
     * Remote camera
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_CONNECTION_REMOTE = 2
  }

  /**
   * Enum for remote camera device type.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  enum HostDeviceType {
    /**
     * Indicates an unknown device camera.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    UNKNOWN_TYPE = 0,
    /**
     * Indicates a smartphone camera.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    PHONE = 0x0E,
    /**
     * Indicates a tablet camera.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    TABLET = 0x11
  }

  /**
   * Camera device object.
   *
   * @typedef CameraDevice
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraDevice {
    /**
     * Camera id attribute.
     *
     * @type { string }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly cameraId: string;
    /**
     * Camera position attribute.
     *
     * @type { CameraPosition }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly cameraPosition: CameraPosition;
    /**
     * Camera type attribute.
     *
     * @type { CameraType }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly cameraType: CameraType;
    /**
     * Camera connection type attribute.
     *
     * @type { ConnectionType }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly connectionType: ConnectionType;
    /**
     * Camera remote camera device name attribute.
     *
     * @type { string }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    readonly hostDeviceName: string;
    /**
     * Camera remote camera device type attribute.
     *
     * @type { HostDeviceType }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    readonly hostDeviceType: HostDeviceType;
  }

  /**
   * Size parameter.
   *
   * @typedef Size
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface Size {
    /**
     * Height.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    height: number;
    /**
     * Width.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    width: number;
  }

  /**
   * Point parameter.
   *
   * @typedef Point
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface Point {
    /**
     * x co-ordinate
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    x: number;
    /**
     * y co-ordinate
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    y: number;
  }

  /**
   * Camera input object.
   *
   * @interface CameraInput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraInput {
    /**
     * Open camera.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400107 - Can not use camera cause of conflict.
     * @throws { BusinessError } 7400108 - Camera disabled cause of security reason.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    open(callback: AsyncCallback<void>): void;

    /**
     * Open camera.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400107 - Can not use camera cause of conflict.
     * @throws { BusinessError } 7400108 - Camera disabled cause of security reason.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    open(): Promise<void>;

    /**
     * Close camera.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    close(callback: AsyncCallback<void>): void;

    /**
     * Close camera.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    close(): Promise<void>;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { CameraDevice } camera - Camera device.
     * @param { ErrorCallback } callback - Callback used to get the camera input errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', camera: CameraDevice, callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { CameraDevice } camera - Camera device.
     * @param { ErrorCallback } callback - Callback used to get the camera input errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', camera: CameraDevice, callback?: ErrorCallback): void;
  }

  /**
   * Enum for camera format type.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum CameraFormat {
    /**
     * RGBA 8888 Format.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_FORMAT_RGBA_8888 = 3,

    /**
     * YUV 420 Format.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_FORMAT_YUV_420_SP = 1003,

    /**
     * JPEG Format.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    CAMERA_FORMAT_JPEG = 2000
  }

  /**
   * Enum for flash mode.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum FlashMode {
    /**
     * Close mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FLASH_MODE_CLOSE = 0,
    /**
     * Open mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FLASH_MODE_OPEN = 1,
    /**
     * Auto mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FLASH_MODE_AUTO = 2,
    /**
     * Always open mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FLASH_MODE_ALWAYS_OPEN = 3
  }

  /**
   * Enum for exposure mode.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum ExposureMode {
    /**
     * Lock exposure mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    EXPOSURE_MODE_LOCKED = 0,
    /**
     * Auto exposure mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    EXPOSURE_MODE_AUTO = 1,
    /**
     * Continuous automatic exposure.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    EXPOSURE_MODE_CONTINUOUS_AUTO = 2
  }

  /**
   * Enum for focus mode.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum FocusMode {
    /**
     * Manual mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_MODE_MANUAL = 0,
    /**
     * Continuous auto mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_MODE_CONTINUOUS_AUTO = 1,
    /**
     * Auto mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_MODE_AUTO = 2,
    /**
     * Locked mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_MODE_LOCKED = 3
  }

  /**
   * Enum for focus state.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum FocusState {
    /**
     * Scan state.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_STATE_SCAN = 0,
    /**
     * Focused state.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_STATE_FOCUSED = 1,
    /**
     * Unfocused state.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    FOCUS_STATE_UNFOCUSED = 2
  }

  /**
   * Enum for video stabilization mode.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum VideoStabilizationMode {
    /**
     * Turn off video stablization.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    OFF = 0,
    /**
     * LOW mode provides basic stabilization effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    LOW = 1,
    /**
     * MIDDLE mode means algorithms can achieve better effects than LOW mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    MIDDLE = 2,
    /**
     * HIGH mode means algorithms can achieve better effects than MIDDLE mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    HIGH = 3,
    /**
     * Camera HDF can select mode automatically.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    AUTO = 4
  }

  /**
   * Enumerates the camera filter types.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  enum FilterType {
    /**
     * Filter disabled. No filter effect is provided.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    NONE = 0,

    /**
     * Classic filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    CLASSIC = 1,

    /**
     * Dawn filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    DAWN = 2,

    /**
     * Pure filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    PURE = 3,

    /**
     * Grey filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    GREY = 4,

    /**
     * Natural filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    NATURAL = 5,

    /**
     * Mori filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    MORI = 6,

    /**
     * Fair filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    FAIR = 7,

    /**
     * Pink filter effect.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    PINK = 8
  }

  /**
   * Enumerates the camera beauty effect types.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  enum BeautyType {
    /**
     * Auto beauty type.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    AUTO = 0,

    /**
     * Skin smooth beauty type.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    SKIN_SMOOTH = 1,

    /**
     * Face slender beauty type.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    FACE_SLENDER = 2,

    /**
     * Skin tone beauty type.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    SKIN_TONE = 3
  }

  /**
   * Capture session object.
   *
   * @interface CaptureSession
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CaptureSession {
    /**
     * Begin capture session config.
     *
     * @throws { BusinessError } 7400105 - Session config locked.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    beginConfig(): void;

    /**
     * Commit capture session config.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    commitConfig(callback: AsyncCallback<void>): void;

    /**
     * Commit capture session config.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    commitConfig(): Promise<void>;

    /**
     * Adds a camera input.
     *
     * @param { CameraInput } cameraInput - Target camera input to add.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    addInput(cameraInput: CameraInput): void;

    /**
     * Removes a camera input.
     *
     * @param { CameraInput } cameraInput - Target camera input to remove.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    removeInput(cameraInput: CameraInput): void;

    /**
     * Adds a camera output.
     *
     * @param { CameraOutput } cameraOutput - Target camera output to add.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    addOutput(cameraOutput: CameraOutput): void;

    /**
     * Removes a camera output.
     *
     * @param { CameraOutput } cameraOutput - Target camera output to remove.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400102 - Operation not allowed.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    removeOutput(cameraOutput: CameraOutput): void;

    /**
     * Starts capture session.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(callback: AsyncCallback<void>): void;

    /**
     * Starts capture session.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(): Promise<void>;

    /**
     * Stops capture session.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(callback: AsyncCallback<void>): void;

    /**
     * Stops capture session.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(): Promise<void>;

    /**
     * Release capture session instance.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    release(callback: AsyncCallback<void>): void;

    /**
     * Release capture session instance.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    release(): Promise<void>;

    /**
     * Check if device has flash light.
     *
     * @returns { boolean } The flash light support status.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    hasFlash(): boolean;

    /**
     * Checks whether a specified flash mode is supported.
     *
     * @param { FlashMode } flashMode - Flash mode
     * @returns { boolean } Is the flash mode supported.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isFlashModeSupported(flashMode: FlashMode): boolean;

    /**
     * Gets current flash mode.
     *
     * @returns { FlashMode } The current flash mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getFlashMode(): FlashMode;

    /**
     * Sets flash mode.
     *
     * @param { FlashMode } flashMode - Target flash mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setFlashMode(flashMode: FlashMode): void;

    /**
     * Checks whether a specified exposure mode is supported.
     *
     * @param { ExposureMode } aeMode - Exposure mode
     * @returns { boolean } Is the exposure mode supported.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isExposureModeSupported(aeMode: ExposureMode): boolean;

    /**
     * Gets current exposure mode.
     *
     * @returns { ExposureMode } The current exposure mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getExposureMode(): ExposureMode;

    /**
     * Sets Exposure mode.
     *
     * @param { ExposureMode } aeMode - Exposure mode
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setExposureMode(aeMode: ExposureMode): void;

    /**
     * Gets current metering point.
     *
     * @returns { Point } The current metering point.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getMeteringPoint(): Point;

    /**
     * Set the center point of the metering area.
     *
     * @param { Point } point - metering point
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setMeteringPoint(point: Point): void;

    /**
     * Query the exposure compensation range.
     *
     * @returns { Array<number> } The array of compensation range.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getExposureBiasRange(): Array<number>;

    /**
     * Set exposure compensation.
     *
     * @param { number } exposureBias - Exposure compensation
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setExposureBias(exposureBias: number): void;

    /**
     * Query the exposure value.
     *
     * @returns { number } The exposure value.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getExposureValue(): number;

    /**
     * Checks whether a specified focus mode is supported.
     *
     * @param { FocusMode } afMode - Focus mode.
     * @returns { boolean } Is the focus mode supported.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isFocusModeSupported(afMode: FocusMode): boolean;

    /**
     * Gets current focus mode.
     *
     * @returns { FocusMode } The current focus mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getFocusMode(): FocusMode;

    /**
     * Sets focus mode.
     *
     * @param { FocusMode } afMode - Target focus mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setFocusMode(afMode: FocusMode): void;

    /**
     * Sets focus point.
     *
     * @param { Point } point - Target focus point.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setFocusPoint(point: Point): void;

    /**
     * Gets current focus point.
     *
     * @returns { Point } The current focus point.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getFocusPoint(): Point;

    /**
     * Gets current focal length.
     *
     * @returns { number } The current focal point.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getFocalLength(): number;

    /**
     * Gets all supported zoom ratio range.
     *
     * @returns { Array<number> } The zoom ratio range.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getZoomRatioRange(): Array<number>;

    /**
     * Gets zoom ratio.
     *
     * @returns { number } The zoom ratio value.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getZoomRatio(): number;

    /**
     * Sets zoom ratio.
     *
     * @param { number } zoomRatio - Target zoom ratio.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setZoomRatio(zoomRatio: number): void;

    /**
     * Check whether the specified video stabilization mode is supported.
     *
     * @param { VideoStabilizationMode } vsMode - Video Stabilization mode.
     * @returns { boolean } Is flash mode supported.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isVideoStabilizationModeSupported(vsMode: VideoStabilizationMode): boolean;

    /**
     * Query the video stabilization mode currently in use.
     *
     * @returns { VideoStabilizationMode } The current video stabilization mode.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    getActiveVideoStabilizationMode(): VideoStabilizationMode;

    /**
     * Set video stabilization mode.
     *
     * @param { VideoStabilizationMode } mode - video stabilization mode to set.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    setVideoStabilizationMode(mode: VideoStabilizationMode): void;

    /**
     * Subscribes focus status change event callback.
     *
     * @param { 'focusStateChange' } type - Event type.
     * @param { AsyncCallback<FocusState> } callback - Callback used to get the focus state change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'focusStateChange', callback: AsyncCallback<FocusState>): void;

    /**
     * Unsubscribes from focus status change event callback.
     *
     * @param { 'focusStateChange' } type - Event type.
     * @param { AsyncCallback<FocusState> } callback - Callback used to get the focus state change.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'focusStateChange', callback?: AsyncCallback<FocusState>): void;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the capture session errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the capture session errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;

    /**
     * Gets the supported filter effects.
     * 
     * @returns { Array<number> } List of filter effects, the list must be a subset of {@link FilterType}
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedFilters(): Array<number>;

    /**
     * Gets the filter effect in use.
     *
     * @returns { number } the filter effect in use, included in {@link FilterType}
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getFilter(): number;

    /**
     * Sets a filter effect for a camera device.
     *
     * @param { number } filter - Filter effect to set. The filter must be included in {@link FilterType}
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    setFilter(filter: number): void;

    /**
     * Gets supported beauty effect types.
     *
     * @returns { Array<BeautyType> } List of beauty effect types.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedBeautyTypes(): Array<BeautyType>;

    /**
     * Gets the specific beauty effect type range.
     *
     * @param { BeautyType } type - The type of beauty effect.
     * @returns { Array<number> } The array of the specific beauty effect range.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedBeautyRange(type: BeautyType): Array<number>;

    /**
     * Gets the beauty effect in use.
     *
     * @param { BeautyType } type - The type of beauty effect.
     * @returns { number } the beauty effect in use.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getBeauty(type: BeautyType): number;

    /**
     * Sets a beauty effect for a camera device.
     *
     * @param { BeautyType } type - The type of beauty effect.
     * @param { number } value The number of beauty effect.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    setBeauty(type: BeautyType, value: number): void;
  }

  /**
   * Enumerates the camera modes.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  enum CameraMode {
    /**
     * portrait mode.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    PORTRAIT = 1
  }

  /**
   * Creates a ModeManager instance.
   *
   * @param { Context } context - Current application context.
   * @returns { ModeManager } ModeManager instance.
   * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
   * @throws { BusinessError } 7400201 - Camera service fatal error.
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  function getModeManager(context: Context): ModeManager;

  /**
   * Camera mode manager object.
   *
   * @interface ModeManager
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  interface ModeManager {
    /**
     * Gets the modes supported by the specified camera.
     *
     * @param { CameraDevice } device - Camera device.
     * @returns { Array<CameraMode> } List of modes supported by the camera device.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedModes(device: CameraDevice): Array<CameraMode>;

    /**
     * Gets the supported output capability for the specific camera and specific mode.
     *
     * @param { CameraDevice } device - Camera device.
     * @param { CameraMode } mode - Camera mode.
     * @returns { CameraOutputCapability } The camera output capability.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedOutputCapability(device: CameraDevice, mode: CameraMode): CameraOutputCapability;

    /**
     * Gets a CaptureSession instance for the specific camera mode.
     *
     * @param { CameraMode } mode - Camera mode.
     * @returns { CaptureSession } The CaptureSession instance for specific camera mode.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    createCaptureSession(mode: CameraMode): CaptureSession;
  }

  /**
   * Enumerates the camera portrait effects.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  enum PortraitEffect {
    /**
     * portrait effect off.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    OFF = 0,

    /**
     * circular blurring for portrait.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    CIRCLES = 1
  }

  /**
   * Portrait session object.
   *
   * @interface PortraitSession
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @systemapi
   * @since 10
   */
  interface PortraitSession extends CaptureSession {
    /**
     * Gets supported portrait effect.
     *
     * @returns { Array<PortraitEffect> } List of portrait effect.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getSupportedPortraitEffects(): Array<PortraitEffect>;

    /**
     * Gets the portrait effect in use.
     *
     * @returns { PortraitEffect } The portrait effect in use.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    getPortraitEffect(): PortraitEffect;

    /**
     * Sets a portrait effect for a camera device.
     *
     * @param { PortraitEffect } effect - Effect Portrait effect to set.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    setPortraitEffect(effect: PortraitEffect): void;
  }

  /**
   * Camera output object.
   *
   * @interface CameraOutput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CameraOutput {
    /**
     * Release output instance.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    release(callback: AsyncCallback<void>): void;

    /**
     * Release output instance.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    release(): Promise<void>;
  }

  /**
   * Preview output object.
   *
   * @interface PreviewOutput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface PreviewOutput extends CameraOutput {
    /**
     * Start output instance.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(callback: AsyncCallback<void>): void;

    /**
     * Start output instance.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(): Promise<void>;

    /**
     * Stop output instance.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(callback: AsyncCallback<void>): void;

    /**
     * Stop output instance.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(): Promise<void>;

    /**
     * Subscribes frame start event callback.
     *
     * @param { 'frameStart' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'frameStart', callback: AsyncCallback<void>): void;

    /**
     * Unsubscribes from frame start event callback.
     *
     * @param { 'frameStart' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'frameStart', callback?: AsyncCallback<void>): void;

    /**
     * Subscribes frame end event callback.
     *
     * @param { 'frameEnd' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'frameEnd', callback: AsyncCallback<void>): void;

    /**
     * Unsubscribes from frame end event callback.
     *
     * @param { 'frameEnd' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'frameEnd', callback?: AsyncCallback<void>): void;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the preview output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the preview output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;

    /**
     * Adds a deferred surface.
     *
     * @param { string } surfaceId - Surface object id used in camera photo output.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    addDeferredSurface(surfaceId: string): void;
  }

  /**
   * Enumerates the image rotation angles.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum ImageRotation {
    /**
     * The capture image rotates 0 degrees.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    ROTATION_0 = 0,

    /**
     * The capture image rotates 90 degrees.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    ROTATION_90 = 90,

    /**
     * The capture image rotates 180 degrees.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    ROTATION_180 = 180,

    /**
     * The capture image rotates 270 degrees.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    ROTATION_270 = 270
  }

  /**
   * Photo capture location
   *
   * @typedef Location
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface Location {
    /**
     * Latitude.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    latitude: number;

    /**
     * Longitude.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    longitude: number;

    /**
     * Altitude.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    altitude: number;
  }

  /**
   * Enumerates the image quality levels.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum QualityLevel {
    /**
     * High image quality.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    QUALITY_LEVEL_HIGH = 0,

    /**
     * Medium image quality.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    QUALITY_LEVEL_MEDIUM = 1,

    /**
     * Low image quality.
     *
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    QUALITY_LEVEL_LOW = 2
  }

  /**
   * Photo capture options to set.
   *
   * @typedef PhotoCaptureSetting
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface PhotoCaptureSetting {
    /**
     * Photo image quality.
     *
     * @type { ?QualityLevel }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    quality?: QualityLevel;

    /**
     * Photo rotation.
     *
     * @type { ?ImageRotation }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    rotation?: ImageRotation;

    /**
     * Photo location.
     *
     * @type { ?Location }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    location?: Location;

    /**
     * Set the mirror photo function switch, default to false.
     *
     * @type { ?boolean }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    mirror?: boolean;
  }

  /**
   * Photo output object.
   *
   * @interface PhotoOutput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface PhotoOutput extends CameraOutput {
    /**
     * Start capture output.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400104 - Session not running.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    capture(callback: AsyncCallback<void>): void;

    /**
     * Start capture output.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400104 - Session not running.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    capture(): Promise<void>;

    /**
     * Start capture output.
     *
     * @param { PhotoCaptureSetting } setting - Photo capture settings.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400104 - Session not running.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    capture(setting: PhotoCaptureSetting, callback: AsyncCallback<void>): void;

    /**
     * Start capture output.
     *
     * @param { PhotoCaptureSetting } setting - Photo capture settings.
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400101 - Parameter missing or parameter type incorrect.
     * @throws { BusinessError } 7400104 - Session not running.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    capture(setting?: PhotoCaptureSetting): Promise<void>;

    /**
     * Check whether to support mirror photo.
     *
     * @returns { boolean } Is the mirror supported.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    isMirrorSupported(): boolean;

    /**
     * Subscribes capture start event callback.
     *
     * @param { 'captureStart' } type - Event type.
     * @param { AsyncCallback<number> } callback - Callback used to get the capture ID.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'captureStart', callback: AsyncCallback<number>): void;

    /**
     * Unsubscribes from capture start event callback.
     *
     * @param { 'captureStart' } type - Event type.
     * @param { AsyncCallback<number> } callback - Callback used to get the capture ID.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'captureStart', callback?: AsyncCallback<number>): void;

    /**
     * Subscribes frame shutter event callback.
     *
     * @param { 'frameShutter' } type - Event type.
     * @param { AsyncCallback<FrameShutterInfo> } callback - Callback used to get the frame shutter information.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'frameShutter', callback: AsyncCallback<FrameShutterInfo>): void;

    /**
     * Unsubscribes from frame shutter event callback.
     *
     * @param { 'frameShutter' } type - Event type.
     * @param { AsyncCallback<FrameShutterInfo> } callback - Callback used to get the frame shutter information.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'frameShutter', callback?: AsyncCallback<FrameShutterInfo>): void;

    /**
     * Subscribes capture end event callback.
     *
     * @param { 'captureEnd' } type - Event type.
     * @param { AsyncCallback<CaptureEndInfo> } callback - Callback used to get the capture end information.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'captureEnd', callback: AsyncCallback<CaptureEndInfo>): void;

    /**
     * Unsubscribes from capture end event callback.
     *
     * @param { 'captureEnd' } type - Event type.
     * @param { AsyncCallback<CaptureEndInfo> } callback - Callback used to get the capture end information.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'captureEnd', callback?: AsyncCallback<CaptureEndInfo>): void;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the photo output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the photo output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;

    /**
     * Checks whether PhotoOutput supports quick thumbnail.
     * This method is valid after CaptureSession.addInput() and CaptureSession.addOutput(photoOutput) are called.
     *
     * @returns { boolean } Whether quick thumbnail is supported.
     * @throws { BusinessError } 7400104 - session is not running.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    isQuickThumbnailSupported(): boolean;

    /**
     * Enables or disables quick thumbnail.
     * The method must be called after CaptureSession.addInput() and CaptureSession.addOutput(photoOutput) are called.
     * To avoid stream reconfiguration and performance loss,
     * you are advised to call the method before CaptureSession.commitConfig().
     * 
     * @param { boolean } enabled - The value TRUE means to enable quick thumbnail, and FALSE means the opposite.
     * @throws { BusinessError } 7400104 - session is not running.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    enableQuickThumbnail(enabled: boolean): void;

    /**
     * Subscribes to camera thumbnail events.
     * This method is valid only after enableQuickThumbnail(true) is called.
     *
     * @param { 'quickThumbnail' } type - Event type.
     * @param { AsyncCallback<image.PixelMap> } callback - Callback used to get the quick thumbnail.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    on(type: 'quickThumbnail', callback: AsyncCallback<image.PixelMap>): void;

    /**
     * Unsubscribes from camera thumbnail events.
     * This method is valid only after enableQuickThumbnail(true) is called.
     *
     * @param { 'quickThumbnail' } type - Event type.
     * @param { AsyncCallback<image.PixelMap> } callback - Callback used to get the quick thumbnail.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @systemapi
     * @since 10
     */
    off(type: 'quickThumbnail', callback?: AsyncCallback<image.PixelMap>): void;
  }

  /**
   * Frame shutter callback info.
   *
   * @typedef FrameShutterInfo
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface FrameShutterInfo {
    /**
     * Capture id.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    captureId: number;
    /**
     * Timestamp for frame.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    timestamp: number;
  }

  /**
   * Capture end info.
   *
   * @typedef CaptureEndInfo
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface CaptureEndInfo {
    /**
     * Capture id.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    captureId: number;
    /**
     * Frame count.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    frameCount: number;
  }

  /**
   * Video output object.
   *
   * @interface VideoOutput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface VideoOutput extends CameraOutput {
    /**
     * Start video output.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(callback: AsyncCallback<void>): void;

    /**
     * Start video output.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(): Promise<void>;

    /**
     * Stop video output.
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(callback: AsyncCallback<void>): void;

    /**
     * Stop video output.
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(): Promise<void>;

    /**
     * Subscribes frame start event callback.
     *
     * @param { 'frameStart' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'frameStart', callback: AsyncCallback<void>): void;

    /**
     * Unsubscribes from frame start event callback.
     *
     * @param { 'frameStart' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'frameStart', callback?: AsyncCallback<void>): void;

    /**
     * Subscribes frame end event callback.
     *
     * @param { 'frameEnd' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'frameEnd', callback: AsyncCallback<void>): void;

    /**
     * Unsubscribes from frame end event callback.
     *
     * @param { 'frameEnd' } type - Event type.
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'frameEnd', callback?: AsyncCallback<void>): void;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the video output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the video output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }

  /**
   * Metadata object type.
   *
   * @enum { number }
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  enum MetadataObjectType {
    FACE_DETECTION = 0
  }

  /**
   * Rectangle definition.
   *
   * @typedef Rect
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface Rect {
    /**
     * X coordinator of top left point.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    topLeftX: number;
    /**
     * Y coordinator of top left point.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    topLeftY: number;
    /**
     * Width of this rectangle.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    width: number;
    /**
     * Height of this rectangle.
     *
     * @type { number }
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    height: number;
  }

  /**
   * Metadata object basis.
   *
   * @typedef MetadataObject
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface MetadataObject {
    /**
     * Metadata object type.
     *
     * @type { MetadataObjectType }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly type: MetadataObjectType;
    /**
     * Metadata object timestamp in milliseconds.
     *
     * @type { number }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly timestamp: number;
    /**
     * The axis-aligned bounding box of detected metadata object.
     *
     * @type { Rect }
     * @readonly
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    readonly boundingBox: Rect;
  }

  /**
   * Metadata Output object
   *
   * @interface MetadataOutput
   * @syscap SystemCapability.Multimedia.Camera.Core
   * @since 10
   */
  interface MetadataOutput extends CameraOutput {
    /**
     * Start output metadata
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(callback: AsyncCallback<void>): void;

    /**
     * Start output metadata
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @throws { BusinessError } 7400103 - Session not config.
     * @throws { BusinessError } 7400201 - Camera service fatal error.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    start(): Promise<void>;

    /**
     * Stop output metadata
     *
     * @param { AsyncCallback<void> } callback - Callback used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(callback: AsyncCallback<void>): void;

    /**
     * Stop output metadata
     *
     * @returns { Promise<void> } Promise used to return the result.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    stop(): Promise<void>;

    /**
     * Subscribes to metadata objects available event callback.
     *
     * @param { 'metadataObjectsAvailable' } type - Event type.
     * @param { AsyncCallback<Array<MetadataObject>> } callback - Callback used to get the available metadata objects.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'metadataObjectsAvailable', callback: AsyncCallback<Array<MetadataObject>>): void;

    /**
     * Unsubscribes from metadata objects available event callback.
     *
     * @param { 'metadataObjectsAvailable' } type - Event type.
     * @param { AsyncCallback<Array<MetadataObject>> } callback - Callback used to get the available metadata objects.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'metadataObjectsAvailable', callback?: AsyncCallback<Array<MetadataObject>>): void;

    /**
     * Subscribes to error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the video output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    on(type: 'error', callback: ErrorCallback): void;

    /**
     * Unsubscribes from error events.
     *
     * @param { 'error' } type - Event type.
     * @param { ErrorCallback } callback - Callback used to get the video output errors.
     * @syscap SystemCapability.Multimedia.Camera.Core
     * @since 10
     */
    off(type: 'error', callback?: ErrorCallback): void;
  }
}

export default camera;