import { Readable, PassThrough } from 'node:stream';
import type { Uint8ArrayOrStreamRange } from './utils';
/**
 * Single buffer stream
 */
export declare class BufferStream extends Readable {
    private buffer;
    /**
     * Create a single buffer stream
     * @param buffer - content buffer or undefined if stream need to be empty
     */
    constructor(buffer?: Uint8Array);
    /**
     * Read implementation
     */
    _read(): void;
    /**
     * Destroy implementation
     * @param error - error or null
     * @param callback - callback to be called after destroy
     */
    _destroy(error: Error | null, callback: (err?: Error | null) => void): void;
}
/**
 * Multi stream
 */
export declare class MultiStream extends PassThrough {
    private readonly ranges;
    private readonly onNextStream;
    private readonly onDestroy;
    /**
     * Create a multi streams stream
     * @param ranges - array of Buffer or StreamRange
     * @param onNextStream - function creating the Readable when needed
     * @param onDestroy - function called on close to release resources
     */
    constructor(ranges: Uint8ArrayOrStreamRange[], onNextStream: (range: Uint8ArrayOrStreamRange) => Readable, onDestroy: () => Promise<void>);
    /**
     * Destroy implementation
     * @param error - error or null
     * @param callback - callback to be called after destroy
     */
    _destroy(error: Error | null, callback: (err?: Error | null) => void): void;
    private sendNextRange;
}