/**
 * Decode literals section: Raw, RLE, Compressed, Treeless.
 */
import { buildHuffmanDecodeTable } from '../entropy/huffman.js';
export type LiteralsBlockType = 0 | 1 | 2 | 3;
export interface LiteralsSectionHeader {
    blockType: LiteralsBlockType;
    regeneratedSize: number;
    compressedSize?: number;
    numStreams: 1 | 4;
    headerSize: number;
}
/**
 * Parse Literals_Section_Header from compressed block.
 * Returns header info and the byte offset after the header.
 */
export declare function parseLiteralsSectionHeader(data: Uint8Array, offset: number): {
    header: LiteralsSectionHeader;
    dataOffset: number;
};
/**
 * Decode raw literals block - direct copy.
 */
export declare function decodeRawLiterals(data: Uint8Array, offset: number, size: number): Uint8Array;
/**
 * Decode RLE literals block - single byte repeated.
 */
export declare function decodeRLELiterals(data: Uint8Array, offset: number, size: number): Uint8Array;
/**
 * Decode compressed literals (Huffman). Requires Huffman table from tree description.
 */
export declare function decodeCompressedLiterals(data: Uint8Array, offset: number, compressedSize: number, regeneratedSize: number, numStreams: 1 | 4): {
    literals: Uint8Array;
    huffmanTable: {
        table: ReturnType<typeof buildHuffmanDecodeTable>;
        maxNumBits: number;
    };
    bytesRead: number;
};
/**
 * Decode treeless literals (reuse previous Huffman table).
 */
export declare function decodeTreelessLiterals(data: Uint8Array, offset: number, compressedSize: number, regeneratedSize: number, numStreams: 1 | 4, huffmanTable: {
    table: ReturnType<typeof buildHuffmanDecodeTable>;
    maxNumBits: number;
}): {
    literals: Uint8Array;
    bytesRead: number;
};