export declare const MAX_HUFFMAN_BITS = 15;
export declare const MAX_CODE_LENGTH_BITS = 7;
export declare const REPEAT_PREVIOUS_CODE_LENGTH = 16;
export declare const REPEAT_ZERO_CODE_LENGTH = 17;
export declare const CODE_LENGTH_CODES = 18;
export declare const INITIAL_REPEATED_CODE_LENGTH = 8;
export interface HuffmanTree {
    depths: Uint8Array;
    bits: Uint16Array;
}
export declare function createHuffmanTree(histogram: Uint32Array, treeLimit?: number): HuffmanTree;
export declare function convertBitDepthsToSymbols(depths: Uint8Array, bits: Uint16Array): void;
export declare function optimizeHuffmanCountsForRle(counts: Uint32Array): void;
export interface HuffmanTreeRle {
    symbols: Uint8Array;
    extraBits: Uint8Array;
    length: number;
}
export declare function writeHuffmanTree(depths: Uint8Array): HuffmanTreeRle;
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