/// <reference types="node" />
/**
 * @file Wrappers around the node-usb stuff to be a node.js stream
 */
import { Readable, Writable } from 'stream';
import * as usb from 'usb';
export declare class InStream extends Readable {
    private endpoint;
    polling: boolean;
    /**
     * Stream from dongle --> PC
     */
    constructor(endpoint: usb.InEndpoint);
    _read(size: number): void;
    private onData(chunk);
    private onError(err);
    private onEnd();
}
export declare class OutStream extends Writable {
    private endpoint;
    /**
     * Stream from PC --> dongle
     */
    constructor(endpoint: usb.OutEndpoint);
    _write(chunk: Buffer, encoding: string, callback: (err?: Error) => void): void;
    private onError(err);
}