import fs from 'fs';
import { CVType } from '../../types';
import { ClientOption } from '../../types';
/**
 * Class for compiling information about audio
 */
export declare class AudioAssets {
    /**
     * Audio base URL of mihoyo
     */
    private static readonly AUDIO_BASE_URL_MIHOYO;
    /**
     * Fetch option
     */
    private static fetchOption;
    /**
     * Audio base URL by regex
     */
    private static audioBaseURLByRegex;
    /**
     * Default audio base URL
     */
    private static defaultAudioBaseURL;
    /**
     * Whether to cache the audio
     */
    private static autoCacheAudio;
    /**
     * Audio folder path
     */
    private static audioFolderPath;
    /**
     * Audio name
     */
    readonly name: string;
    /**
     * Audio base URL
     */
    readonly audioBaseURL: string;
    /**
     * Audio URL
     */
    readonly url: string;
    /**
     * Audio cv
     */
    readonly cv?: CVType;
    /**
     * Character ID
     */
    readonly characterId?: number;
    /**
     * Audio URL of mihoyo
     */
    readonly mihoyoURL: string;
    /**
     * Classes for handling audios
     * @param name Audio name
     * @param cv Audio cv
     * @param characterId Character ID
     */
    constructor(name: string, cv?: CVType, characterId?: number);
    /**
     * Classes for handling audios
     * @param option Client option
     */
    static deploy(option: ClientOption): void;
    /**
     * Fetch audio buffer
     * @returns Audio buffer
     */
    fetchBuffer(): Promise<Buffer>;
    /**
     * Fetch audio stream
     * @param highWaterMark HighWaterMark
     * @returns Audio stream
     */
    fetchStream(highWaterMark?: number): Promise<fs.ReadStream>;
    /**
     * Check if the OGG file is corrupted
     * @warning This function is not perfect, it may not be able to detect all corrupted OGG files. because it only checks the last OggS header.
     * @param filePath File path
     * @returns is OGG file corrupted
     */
    private isOGGCorrupted;
}