interface RecorderOptions {
    wsUrl: string;
    sampleRate?: number;
    onMessage?: (data: any) => void;
    onError?: (error: any) => void;
    onProcess?: (buffer: any, powerLevel: number, bufferDuration: number, bufferSampleRate: number, newBufferIdx: number, asyncEnd: any) => void;
}
export declare class RecorderCore {
    wsUrl: string;
    sampleRate: number;
    private socketTask;
    private rec;
    private readyState;
    private reconnectTimeout;
    private bitRate;
    private recStatus;
    private isNotAllow;
    onMessage: (data: any) => void;
    onError: (error: any) => void;
    onProcess: (buffer: any, powerLevel: number, bufferDuration: number, bufferSampleRate: number, newBufferIdx: number, asyncEnd: any) => void;
    constructor(options: RecorderOptions);
    init(): void;
    private bindEvents;
    start(): Promise<{
        success: boolean;
    }>;
    private open;
    close(): void;
    private reconnect;
    send(sampleBuf: string | ArrayBuffer): void;
}
export {};