image-in-browser/lib/formats/webp/vp8l-bit-reader.d.ts

Package for encoding / decoding images, transforming images, applying filters, drawing primitives on images on the client side (no need for server Node.js)

/** @format */
import { InputBuffer } from '../../common/input-buffer.js';
/**
 * Class representing a VP8L Bit Reader.
 */
export declare class VP8LBitReader {
    /**
     * Input buffer for reading bits.
     */
    private readonly _input;
    /**
     * Buffer for storing bits.
     */
    private readonly _buffer;
    /**
     * 8-bit view of the buffer.
     */
    private readonly _buffer8;
    /**
     * Current bit position in the buffer.
     */
    private _bitPos;
    /**
     * Gets the current bit position.
     * @returns {number} The current bit position.
     */
    get bitPos(): number;
    /**
     * Sets the current bit position.
     * @param {number} v - The new bit position.
     */
    set bitPos(v: number);
    /**
     * Checks if end of stream is reached.
     * @returns {boolean} True if end of stream is reached, otherwise false.
     */
    get isEOS(): boolean;
    /**
     * Creates an instance of VP8LBitReader.
     * @param {InputBuffer<Uint8Array>} input - The input buffer.
     */
    constructor(input: InputBuffer<Uint8Array>);
    /**
     * If not at EOS, reload up to lBits byte-by-byte.
     */
    private shiftBytes;
    /**
     * Return the prefetched bits, so they can be looked up.
     * @returns {number} The prefetched bits.
     */
    prefetchBits(): number;
    /**
     * Advances the read buffer by 4 bytes to make room for reading next 32 bits.
     */
    fillBitWindow(): void;
    /**
     * Reads the specified number of bits from Read Buffer.
     * @param {number} numBits - The number of bits to read.
     * @returns {number} The bits read.
     * @throws {LibError} If not enough data in input.
     */
    readBits(numBits: number): number;
    /**
     * The number of bytes used for the bit buffer.
     */
    private static readonly valueSize;
    /**
     * Maximum number of bits that can be read.
     */
    private static readonly maxNumBitRead;
    /**
     * Number of bits prefetched.
     */
    private static readonly lBits;
    /**
     * Minimum number of bytes needed after **fillBitWindow**.
     */
    private static readonly wBits;
    /**
     * Number of bytes needed to store wBits bits.
     */
    private static readonly log8WBits;
    /**
     * Bit masks for reading bits.
     */
    private static readonly bitMask;
}