import { ParticipantId } from '../../types/Participant';
import { IScreenShareStat } from '../../types/ScreenSharingStat';
import { StatScreenShareFirstFrame } from '../stat/StatScreenShareFirstFrame';
import { FrameChunk } from './Utils';
export type IOnStat = (stat: IScreenShareStat) => void;
export type IOnStream = (stream: MediaStream) => void;
export declare abstract class BaseStreamBuilder {
    protected readonly _participantId: ParticipantId;
    protected readonly _onStream: IOnStream;
    protected readonly _onStat: IOnStat;
    protected readonly _onKeyFrameRequested?: VoidFunction;
    protected readonly _statScreenShareFirstFrame: StatScreenShareFirstFrame;
    protected _chunks: FrameChunk[];
    protected constructor(participantId: ParticipantId, onStream: IOnStream, onStat: IOnStat, onKeyFrameRequested?: VoidFunction);
    appendChunk(chunk: FrameChunk): void;
    destroy(): void;
    protected abstract _processFrame(frame: FrameData): void;
    private _processFrameData;
    static getFrameSize(frameData: Uint8Array<ArrayBuffer>): {
        width: number;
        height: number;
    };
    static isBrowserSupported(): boolean;
    private _measureFreezeDuration;
}
export interface FrameData {
    timestamp: number;
    frameData: Uint8Array;
    isVP9: boolean;
    keyframe: boolean;
    width: number;
    height: number;
}