/**
+ * Delays execution for the specified duration
+ * @param milliseconds The time to sleep in milliseconds
+ * @throws {Error} If milliseconds is negative
+ * @returns Promise that resolves after the specified duration
+ */
export declare const sleep: (milliseconds: number) => Promise<void>;
/**
 * @deprecated use checkDevicePermission instead
 * Check microphone permission，return boolean
 */
export declare const checkPermission: ({ audio, video, }?: {
    audio?: boolean;
    video?: boolean;
}) => Promise<boolean>;
/**
 * Checks device permissions for audio and video
 * @param checkVideo Whether to check video permissions (default: false)
 * @returns Promise that resolves with the device permission status
 */
export declare const checkDevicePermission: (checkVideo?: boolean) => Promise<{
    video: boolean;
    audio: boolean;
    videoExceptionError?: DOMException | undefined;
    audioExceptionError?: DOMException | undefined;
}>;
/**
 * Get audio devices
 * @returns Promise<AudioDevices> Object containing arrays of audio input and output devices
 */
export declare const getAudioDevices: ({ video, }?: {
    video?: boolean;
}) => Promise<{
    audioInputs: MediaDeviceInfo[];
    audioOutputs: MediaDeviceInfo[];
    videoInputs: MediaDeviceInfo[];
}>;
export declare const isScreenShareDevice: (deviceId?: string) => boolean;
/**
 * 判断是否前后置摄像头
 * @param deviceId
 * @returns
 */
export declare const isMobileVideoDevice: (deviceId?: string) => boolean;
/**
 * Check if browser supports screen sharing
 * 检查浏览器是否支持屏幕共享
 */
export declare function isScreenShareSupported(): boolean;