import { EventBus } from '../events/EventBus';
import { DeviceMap, SelectedDevices } from '../interfaces';
import { IStore } from '../sdk/store';
interface HMSDeviceManager extends DeviceMap {
    outputDevice?: MediaDeviceInfo;
    hasWebcamPermission: boolean;
    hasMicrophonePermission: boolean;
}
export declare class DeviceManager implements HMSDeviceManager {
    private store;
    private eventBus;
    audioInput: MediaDeviceInfo[];
    audioOutput: MediaDeviceInfo[];
    videoInput: MediaDeviceInfo[];
    outputDevice?: MediaDeviceInfo;
    hasWebcamPermission: boolean;
    hasMicrophonePermission: boolean;
    private readonly TAG;
    private initialized;
    private videoInputChanged;
    private audioInputChanged;
    constructor(store: IStore, eventBus: EventBus);
    updateOutputDevice: (deviceId?: string) => Promise<MediaDeviceInfo | undefined>;
    init(force?: boolean): Promise<void>;
    getDevices(): DeviceMap;
    cleanup(): void;
    getCurrentSelection: () => SelectedDevices;
    private createIdentifier;
    private computeChange;
    private enumerateDevices;
    private handleDeviceChange;
    /**
     * Function to get the device after device change
     * Chrome and Edge provide a default device from which we select the actual device
     * Firefox and safari give 0th device as system default
     * @returns {MediaDeviceInfo}
     */
    getNewAudioInputDevice(): MediaDeviceInfo | undefined;
    /**
     * This method is to select the input/output from same group
     * same group meaning both input/output are of same device
     * This method might override the default coming from browser and system so as to select options from same
     * device type. This is required in certain cases where browser's default is not correct.
     * Algo:
     * 1. find the non default input device if selected one is default by matching device label
     * 2. find the corresponding output device which has the same group id or same label
     * 3. select the previous selected device if nothing was found
     * 4. select the default one if no matching device was found and previous device doesn't exist anymore
     * 5. select the first option if there is no default
     */
    setOutputDevice(deviceChange?: boolean): Promise<void>;
    private handleAudioInputDeviceChange;
    private handleVideoInputDeviceChange;
    private getAudioOutputDeviceMatchingInput;
    private logDevices;
}
export {};