import { PLVQosLoadingTraceEvent, PLVQosLoadingTraceEventType } from '../../../common/player/qos/PLVQosLoadingTracer';
import { LifecycleAwareDependComponent } from '@polyvharmony/media-player-foundation';
import { PLVPlaybackMediaPlayerPromiseScope } from '../promise/PLVPlaybackMediaPlayerPromiseScope';
import { PLVPlaybackMediaPlayerDataMediator } from '../../model/mediator/PLVPlaybackMediaPlayerDataMediator';
import { PLVPlaybackMediaPlayerRepo } from '../../model/PLVPlaybackMediaPlayerRepo';
export declare class PlaybackQosTraceUseCase implements LifecycleAwareDependComponent {
    private readonly promiseScope;
    private readonly mediator;
    private readonly repo;
    private readonly qosLoadingTracer;
    private readonly eventMap;
    private loadingEventObserver;
    private bufferingEventObserver;
    private stallingEventObserver;
    private errorEventObserver;
    private bufferStartTimestamp;
    private waitStallingTimeout;
    constructor(promiseScope: PLVPlaybackMediaPlayerPromiseScope, mediator: PLVPlaybackMediaPlayerDataMediator, repo: PLVPlaybackMediaPlayerRepo);
    markEventStart(type: PLVQosLoadingTraceEventType): PLVQosLoadingTraceEvent;
    markEventEnd(type: PLVQosLoadingTraceEventType): void;
    notifyPlayerStart(): void;
    private observePlayerLoading;
    private sendQosLoadingEvent;
    private observePlayerBuffering;
    private sendQosBufferingEvent;
    private observePlayerStalling;
    private sendQosStallingEvent;
    private observeBusinessError;
    private sendErrorEvent;
    onDestroy(): void;
}