import { IMediaPlayerSourceObserver } from '../IAgoraMediaPlayerSource';
import { IAudioSpectrumObserver } from '../AgoraMediaBase';
import { IMediaPlayerImpl } from '../impl/IAgoraMediaPlayerImpl';
import { IMediaPlayerAudioFrameObserver, IMediaPlayerVideoFrameObserver } from '../IAgoraMediaPlayer';
export declare class MediaPlayerInternal extends IMediaPlayerImpl {
    static _source_observers: Map<number, IMediaPlayerSourceObserver[]>;
    static _audio_frame_observers: Map<number, IMediaPlayerAudioFrameObserver[]>;
    static _video_frame_observers: Map<number, IMediaPlayerVideoFrameObserver[]>;
    static _audio_spectrum_observers: Map<number, IAudioSpectrumObserver[]>;
    private readonly _mediaPlayerId;
    constructor(mediaPlayerId: number);
    getMediaPlayerId(): number;
    registerPlayerSourceObserver(observer: IMediaPlayerSourceObserver): number;
    unregisterPlayerSourceObserver(observer: IMediaPlayerSourceObserver): number;
    registerAudioFrameObserver(observer: IMediaPlayerAudioFrameObserver): number;
    unregisterAudioFrameObserver(observer: IMediaPlayerAudioFrameObserver): number;
    registerVideoFrameObserver(observer: IMediaPlayerVideoFrameObserver): number;
    unregisterVideoFrameObserver(observer: IMediaPlayerVideoFrameObserver): number;
    registerMediaPlayerAudioSpectrumObserver(observer: IAudioSpectrumObserver, intervalInMS: number): number;
    unregisterMediaPlayerAudioSpectrumObserver(observer: IAudioSpectrumObserver): number;
    protected getApiTypeFromSetPlayerOptionInInt(key: string, value: number): string;
    protected getApiTypeFromSetPlayerOptionInString(key: string, value: string): string;
}