import { EventBus } from '../events/EventBus';
import { DeviceMap, SelectedDevices } from '../interfaces';
import { Store } from '../sdk/store';
interface HMSDeviceManager extends DeviceMap {
    outputDevice?: MediaDeviceInfo;
    hasWebcamPermission: boolean;
    hasMicrophonePermission: boolean;
}
export declare class DeviceManager implements HMSDeviceManager {
    private store;
    private eventBus;
    audioInput: InputDeviceInfo[];
    audioOutput: MediaDeviceInfo[];
    videoInput: InputDeviceInfo[];
    outputDevice?: MediaDeviceInfo;
    hasWebcamPermission: boolean;
    hasMicrophonePermission: boolean;
    currentSelection: SelectedDevices;
    private readonly TAG;
    private initialized;
    private videoInputChanged;
    private audioInputChanged;
    private earpieceSelected;
    private timer;
    constructor(store: Store, eventBus: EventBus);
    updateOutputDevice: (deviceId?: string, isUserSelection?: boolean) => Promise<MediaDeviceInfo | undefined>;
    init(force?: boolean, logAnalytics?: boolean): Promise<void>;
    getDevices(): DeviceMap;
    cleanup(): void;
    getCurrentSelection: () => SelectedDevices;
    private createIdentifier;
    private computeChange;
    private enumerateDevices;
    /**
     * For example, if a different device, say OBS is selected as default from chrome settings, when you do getUserMedia with default, that is not the device
     * you get. So update to the browser settings default device
     * Update only when initial deviceId is not passed
     */
    private updateToActualDefaultDevice;
    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(): InputDeviceInfo | 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;
    getManuallySelectedAudioDevice(): InputDeviceInfo | undefined;
    categorizeAudioInputDevices(): {
        bluetoothDevice: InputDeviceInfo | null;
        speakerPhone: InputDeviceInfo | null;
        wired: InputDeviceInfo | null;
        earpiece: InputDeviceInfo | null;
    };
    private startPollingForDevices;
    /**
     * Mweb is not able to play via call channel by default, this is to switch from media channel to call channel
     */
    autoSelectAudioOutput: (delay?: number) => Promise<void>;
    private getAudioOutputDeviceMatchingInput;
    private logDevices;
}
export {};