import type Meeting from '.';
import SendSlotManager from '../multistream/sendSlotManager';
export declare const createBrbState: (meeting: Meeting, enabled: boolean) => BrbState;
/** The purpose of this class is to manage the local and remote brb state
 * and make sure that the server state always matches the last requested state by the client.
 */
export declare class BrbState {
    state: {
        client: {
            enabled: boolean;
        };
        server: {
            enabled: boolean;
        };
        syncToServerInProgress: boolean;
    };
    meeting: Meeting;
    /**
     * Constructor
     *
     * @param {Meeting} meeting - the meeting object
     * @param {boolean} enabled - whether the client audio/video is enabled at all
     */
    constructor(meeting: Meeting, enabled: boolean);
    /**
     * Enables/disables brb
     *
     * @param {boolean} enabled
     * @param {SendSlotManager} sendSlotManager
     * @returns {Promise}
     */
    enable(enabled: boolean, sendSlotManager: SendSlotManager): Promise<void>;
    /**
     * Updates the server local and remote brb values so that they match the current client desired state.
     *
     * @param {SendSlotManager} sendSlotManager
     * @returns {Promise}
     */
    private applyClientStateToServer;
    /**
     * Send the local brb state to the server
     *
     * @returns {Promise}
     */
    private sendLocalBrbStateToServer;
    /**
     * This method should be called whenever the server brb state is changed
     *
     * @param {Boolean} [enabled] true if user has brb enabled, false otherwise
     * @returns {undefined}
     */
    handleServerBrbUpdate(enabled?: boolean): void;
}