gis-tools-ts/dist/readers/las/laz/arithmeticDecoder.d.ts

A collection of geospatial tools primarily designed for WGS84, Web Mercator, and S2.

import type { Reader } from '../..';
export declare const AC_HEADER_BYTE = 2;
export declare const AC_BUFFER_SIZE = 4096;
export declare const AC__MinLength = 16777216;
export declare const AC__MaxLength = 4294967295;
export declare const BM__LengthShift = 13;
export declare const BM__MaxCount = 8192;
export declare const DM__LengthShift = 15;
export declare const DM__MaxCount = 32768;
/**
 * https://github.com/LASzip/LASzip/blob/master/src/arithmeticdecoder.cpp
 */
export declare class ArithmeticDecoder {
    readonly reader: Reader;
    value: number;
    length: number;
    /** @param reader - The input reader */
    constructor(reader: Reader);
    /** @param reallyInit - if set to true, initializes the value */
    init(reallyInit?: boolean): void;
    /**
     * @param m - The arithmetic bit model
     * @returns - The decoded bit
     */
    decodeBit(m: ArithmeticBitModel): number;
    /**
     * @param m - The arithmetic model
     * @returns - The decoded symbol
     */
    decodeSymbol(m: ArithmeticModel): number;
    /**
     * @param bits - The number of bits
     * @returns - The decoded bits
     */
    readBits(bits: number): number;
    /** @returns - The decoded short */
    readShort(): number;
    /** @returns - The decoded int */
    readInt(): number;
    /** @returns - The decoded int64 */
    readInt64(): bigint;
    /** Renormalize the decoder interval */
    renormDecInterval(): void;
}
/** Arithmetic Model */
export declare class ArithmeticModel {
    readonly symbols: number;
    readonly compress: boolean;
    distribution: number[];
    symbolCountIndex: number;
    decoderTableIndex: number;
    totalCount: number;
    updateCycle: number;
    symbolsUntilUpdate: number;
    lastSymbol: number;
    tableSize: number;
    tableShift: number;
    /**
     * @param symbols - The number of symbols
     * @param compress - If the model has been compressed
     */
    constructor(symbols: number, compress?: boolean);
    /** @param table - The table */
    init(table?: number[]): void;
    /** Update the model */
    update(): void;
}
/** Arithmetic Bit Model */
export declare class ArithmeticBitModel {
    updateCycle: number;
    bitsUntilUpdate: number;
    bit0Prob: number;
    bit0Count: number;
    bitCount: number;
    /** @returns - 0 */
    init(): number;
    /** Update the model */
    update(): void;
}
//# sourceMappingURL=arithmeticDecoder.d.ts.map