import { BitWriter } from './bit-writer';
import { BlockSplit } from './block-splitter';
import { HistogramLiteral, HistogramCommand, HistogramDistance } from './histogram';
import { Command } from './command';
export declare const NUM_BLOCK_LEN_SYMBOLS = 26;
export declare const MAX_BLOCK_TYPE_SYMBOLS = 258;
export declare const LITERAL_CONTEXT_BITS = 6;
export declare const DISTANCE_CONTEXT_BITS = 2;
export interface MetaBlockSplit {
    literalSplit: BlockSplit;
    commandSplit: BlockSplit;
    distanceSplit: BlockSplit;
    literalContextMap: Uint32Array | null;
    literalContextMapSize: number;
    distanceContextMap: Uint32Array | null;
    distanceContextMapSize: number;
    literalHistograms: HistogramLiteral[];
    commandHistograms: HistogramCommand[];
    distanceHistograms: HistogramDistance[];
}
export declare function createMetaBlockSplit(): MetaBlockSplit;
export declare function blockLengthPrefixCode(len: number): number;
export declare function getBlockLengthPrefixCode(len: number): [number, number, number];
export declare class BlockTypeCodeCalculator {
    lastType: number;
    secondLastType: number;
    nextCode(type: number): number;
}
export interface BlockSplitCode {
    typeDepths: Uint8Array;
    typeBits: Uint16Array;
    lengthDepths: Uint8Array;
    lengthBits: Uint16Array;
    typeCalculator: BlockTypeCodeCalculator;
}
export declare function buildAndStoreBlockSplitCode(writer: BitWriter, types: Uint8Array, lengths: Uint32Array, numBlocks: number, numTypes: number): BlockSplitCode;
export declare function storeBlockSwitch(writer: BitWriter, code: BlockSplitCode, blockLen: number, blockType: number, isFirstBlock: boolean): void;
export declare function encodeMlen(length: number): {
    bits: number;
    numBits: number;
    nibblesBits: number;
};
export declare function storeCompressedMetaBlockHeader(writer: BitWriter, isLast: boolean, length: number): void;
export declare function storeUncompressedMetaBlockHeader(writer: BitWriter, length: number): void;
export declare function storeCommandExtra(writer: BitWriter, cmd: Command): void;
export declare function storeMetaBlockTrivial(writer: BitWriter, input: Uint8Array, startPos: number, length: number, mask: number, isLast: boolean, commands: Command[], distanceAlphabetSize: number, npostfix?: number, ndirect?: number): void;
export declare function storeMetaBlock(writer: BitWriter, input: Uint8Array, startPos: number, length: number, mask: number, isLast: boolean, commands: Command[], distanceAlphabetSize: number, quality: number, npostfix?: number, ndirect?: number): void;
export declare function storeUncompressedMetaBlock(writer: BitWriter, input: Uint8Array, position: number, mask: number, length: number, isFinal: boolean): void;
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