import { IsomMessage } from '../message';
/**
 * Parser class with a public method that takes a data chunk and returns the
 * next box, or null of there is no complete box. The parser keeps track of the
 * added chunks internally in an array and only concatenates chunks when data is
 * needed to construct a message.
 * @type {[type]}
 */
export declare class Parser {
    private _chunks;
    private _length;
    private _box?;
    private _ftyp?;
    /**
     * Create a new Parser object.
     */
    constructor();
    /**
     * Initialize the internal properties to their default starting
     * values.
     */
    _init(): void;
    _push(chunk: Buffer): void;
    /**
     * Extract MP4 boxes.
     * @return {Array} An array of messages, possibly empty.
     */
    _parseBox(): Buffer | null;
    /**
     * Add the next chunk of data to the parser and extract messages.
     * If no message can be extracted, an empty array is returned, otherwise
     * an array of messages is returned.
     * @param  chunk - The next piece of data.
     * @return An array of messages, possibly empty.
     */
    parse(chunk: Buffer): IsomMessage[];
}