import type { StatsReport } from './types';
import { CallState } from '../store';
import { Publisher, Subscriber } from '../rtc';
export type StatsReporterOpts = {
    subscriber: Subscriber;
    publisher?: Publisher;
    state: CallState;
    datacenter: string;
    pollingIntervalInMs?: number;
};
type PeerConnectionKind = 'subscriber' | 'publisher';
export type StatsReporter = {
    /**
     * Will turn on stats reporting for a given sessionId.
     *
     * @param sessionId the session id.
     */
    startReportingStatsFor: (sessionId: string) => void;
    /**
     * Will turn off stats reporting for a given sessionId.
     *
     * @param sessionId the session id.
     */
    stopReportingStatsFor: (sessionId: string) => void;
    /**
     * Helper method for retrieving stats for a given peer connection kind
     * and media stream flowing through it.
     *
     * @param kind the peer connection kind (subscriber or publisher).
     * @param mediaStream the media stream.
     */
    getStatsForStream: (kind: PeerConnectionKind, tracks: MediaStreamTrack[]) => Promise<StatsReport[]>;
    /**
     * Helper method for retrieving raw stats for a given peer connection kind.
     *
     * @param kind the peer connection kind (subscriber or publisher).
     * @param selector the track selector. If not provided, stats for all tracks will be returned.
     */
    getRawStatsForTrack: (kind: PeerConnectionKind, selector?: MediaStreamTrack) => Promise<RTCStatsReport | undefined>;
    /**
     * Stops the stats reporter and releases all resources.
     */
    stop: () => void;
};
/**
 * Creates a new StatsReporter instance that collects metrics about the ongoing call and reports them to the state store
 */
export declare const createStatsReporter: ({ subscriber, publisher, state, datacenter, pollingIntervalInMs, }: StatsReporterOpts) => StatsReporter;
export type StatsTransformOpts = {
    /**
     * The kind of track we are transforming stats for.
     */
    trackKind: 'audio' | 'video';
    /**
     * The kind of peer connection we are transforming stats for.
     */
    kind: PeerConnectionKind;
    /**
     * The publisher instance.
     */
    publisher: Publisher | undefined;
};
export {};