import { TransportTopology } from '../transport/Transport';
/** связанный с операцией `first_media_received` тип логируемого звонка */
declare enum ECallType {
    DirectOutgoing = "direct_outgoing",
    DirectIncoming = "direct_incoming",
    ServerIncoming = "server_incoming",
    ServerJoinServer = "server_join_server",
    ServerChangeTopology = "server_change_topology"
}
export declare class StatFirstMediaReceived {
    /** уже поставили засечку на приём звонка */
    protected _isCallMarked: boolean;
    protected _isFinished: boolean;
    protected _callType: ECallType | null;
    markAcceptCall(topology: TransportTopology): void;
    markAcceptedCall(topology?: TransportTopology): void;
    markParticipantJoined(topology: TransportTopology): void;
    markOnJoin(topology: TransportTopology): void;
    private mark;
    measure(): void;
}
export {};