import { PLVQosLoadingTraceEvent, PLVQosLoadingTraceEventType } from "../../../common/player/qos/PLVQosLoadingTracer";
import { PLVLiveMediaPlayerPromiseScope } from "../promise/PLVLiveMediaPlayerPromiseScope";
import { PLVLiveMediaPlayerDataMediator } from "../../model/mediator/PLVLiveMediaPlayerDataMediator";
import { PLVLiveMediaPlayerRepo } from "../../model/PLVLiveMediaPlayerRepo";
export declare class LiveQosTraceUseCase {
    private readonly promiseScope;
    private readonly mediator;
    private readonly repo;
    private readonly qosLoadingTracer;
    private readonly eventMap;
    private loadingEventObserver;
    private bufferingEventObserver;
    private errorEventObserver;
    private bufferStartTimestamp;
    constructor(promiseScope: PLVLiveMediaPlayerPromiseScope, mediator: PLVLiveMediaPlayerDataMediator, repo: PLVLiveMediaPlayerRepo);
    markEventStart(type: PLVQosLoadingTraceEventType): PLVQosLoadingTraceEvent;
    markEventEnd(type: PLVQosLoadingTraceEventType): void;
    notifyPlayerStart(): void;
    private observePlayerLoading;
    private sendQosLoadingEvent;
    private observePlayerBuffering;
    private sendQosBufferingEvent;
    private observeBusinessError;
    private sendErrorEvent;
}