import { AnalyserConfig } from '../../type/index';
export declare class AudioAnalyser {
    level: number;
    private audioContext;
    private analyser;
    private sourceNode;
    private timeDomainData;
    private fftSize;
    private cardinalNumber;
    constructor(stream: MediaStream, config?: AnalyserConfig);
    getBaseInfo(): {
        cardinalNumber: number;
        fftSize: number;
        level: number;
    };
    /**
     * 初始化
     *
     * @param { MediaStream } stream - 媒体流
     */
    init(stream: MediaStream): void;
    /**
     * 销毁资源
     *
     * @param { boolean } isEnded - 是否已经断链SourceNode
     */
    destroy(isEnded?: boolean): Promise<void>;
    /**
     * 更新MediaStream数据
     *
     * @param { MediaStream } stream - 媒体流
     */
    updateStream(stream: MediaStream): void;
    /**
     * 暂停分析器
     */
    sourceNodeDisconnect(): void;
    /**
     * 获取声音Level数据
     * Rang: 0-100
     *
     * @return { number } - 音量等级，0-100
     */
    getAudioLevel(): number;
}