s2-tools/dist/readers/image/jpeg2000.d.ts

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

import type { Reader } from '..';
/** Component defined Image tile */
interface ComponentTile {
    left: number;
    top: number;
    width: number;
    height: number;
    items: Uint8ClampedArray;
}
/**
 * Jpeg2000 image decoder
 * @returns - the Jpeg2000 image
 */
export declare class JpxImage {
    failOnCorruptedImage: boolean;
    width: number;
    height: number;
    componentsCount: number;
    tiles: ComponentTile[];
    /** @param reader - the reader to parse from */
    constructor(reader: Reader | undefined);
    /**
     * parse the input data into components
     * @param reader - the reader to parse from
     */
    parse(reader: Reader): void;
    /**
     * parse the input data into components
     * @param data - compressed data
     * @param start - start index
     * @param end - end index
     */
    parseCodestream(data: Reader, start: number, end: number): void;
}
/**
 * This class implements the QM Coder decoding as defined in
 *   JPEG 2000 Part I Final Committee Draft Version 1.0
 *   Annex C.3 Arithmetic decoding procedure
 * available at http://www.jpeg.org/public/fcd15444-1.pdf
 *
 * The arithmetic decoder is used in conjunction with context models to decode
 * JPEG2000 and JBIG2 streams.
 */
export declare class ArithmeticDecoder {
    data: Uint8Array;
    start: number;
    end: number;
    a: number;
    chigh: number;
    ct: number;
    clow: number;
    /**
     * C.3.5 Initialisation of the decoder (INITDEC)
     * @param data - compressed data
     * @param start - start index
     * @param end - end index
     */
    constructor(data: Uint8Array, start: number, end: number);
    /** C.3.4 Compressed data input (BYTEIN) */
    byteIn(): void;
    /**
     * C.3.2 Decoding a decision (DECODE)
     * @param contexts - context models
     * @param pos - context model index
     * @returns 0 or 1
     */
    readBit(contexts: number[] | Int8Array, pos: number): number;
}
export {};
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