import { Transform, TransformCallback } from 'stream';
export declare class CounterStream extends Transform {
    private bytesProcessed;
    _transform(chunk: unknown, encoding: BufferEncoding, callback: TransformCallback): void;
    _flush(callback: TransformCallback): void;
    getBytesProcessed(): number;
}
export declare class ProgressStream extends Transform {
    private bytesProcessed;
    private lastReportedProgress;
    private readonly reportInterval;
    private readonly onProgress?;
    constructor(reportIntervalBytes?: number, onProgress?: (bytes: number) => void);
    _transform(chunk: unknown, encoding: BufferEncoding, callback: TransformCallback): void;
    _flush(callback: TransformCallback): void;
    getBytesProcessed(): number;
}