import { ISyncReadable } from '../types.js';
/** a bit reader that reads bits from a byte-aligned stream */
export declare class BitReader implements ISyncReadable {
    #private;
    /** @param readable  fuman readable stream */
    constructor(readable: ISyncReadable);
    /** Whether the reader is currently aligned on a byte boundary */
    get isAligned(): boolean;
    /** Skip any remaining bits in the current byte. No-op if already aligned */
    align(): void;
    /** The current bit position within the last consumed byte */
    get bitPosition(): number;
    readSync(bytes: number): Uint8Array;
    /** read a number of bits from the stream, and return them as a number */
    readBits(size: number): number;
    /** read a number of bits from the stream, and return them as a bigint */
    readBitsBig(size: number): bigint;
    /** skip a number of bits from the stream */
    skipBits(size: number): void;
}