/** @format */
/**
 * Class representing a VP8 random number generator.
 */
export declare class VP8Random {
    /**
     * A table of random values.
     * @private
     */
    private readonly _table;
    /**
     * Index 1 for the random table.
     * @private
     */
    private _index1;
    /**
     * Index 2 for the random table.
     * @private
     */
    private _index2;
    /**
     * Amplitude for dithering.
     * @private
     */
    private _amplitude;
    /**
     * Initializes random generator with an amplitude 'dithering' in range [0..1].
     * @param {number} dithering - The dithering amplitude.
     */
    constructor(dithering: number);
    /**
     * Returns a centered pseudo-random number with **numBits** amplitude.
     * (uses D.Knuth's Difference-based random generator).
     * **amp** is in randomDitherFix fixed-point precision.
     * @param {number} numBits - The number of bits for the random number.
     * @param {number} amp - The amplitude in fixed-point precision.
     * @returns {number} The generated random number.
     */
    randomBits2(numBits: number, amp: number): number;
    /**
     * Returns a centered pseudo-random number with **numBits** amplitude.
     * @param {number} numBits - The number of bits for the random number.
     * @returns {number} The generated random number.
     */
    randomBits(numBits: number): number;
    /**
     * Fixed-point precision for dithering.
     * @private
     * @constant {number}
     */
    private static readonly randomDitherFix;
    /**
     * Size of the random table.
     * @private
     * @constant {number}
     */
    private static readonly randomTableSize;
    /**
     * A table of 31-bit range values.
     * @private
     * @constant {Uint32Array}
     */
    private static readonly randomTable;
}