export declare class V4l2Error extends Error {
    readonly errno: number;
    readonly message: string;
    constructor(errno: number, message: string);
}
export interface PollEvents {
    pollin?: boolean;
    pollout?: boolean;
    pollpri?: boolean;
}
export interface PollEventResults {
    pollin: boolean;
    pollout: boolean;
    pollpri: boolean;
}
export declare function v4l2_open(path: string, flags: number): number;
export declare function v4l2_ioctl(fd: number, request: number, arg: Buffer): number;
export declare function v4l2_mmap(length: number, prot: number, flags: number, fd: number, offset: number): Buffer;
export declare function v4l2_munmap(addr: Buffer): null;
export declare function v4l2_close(fd: number): null;
export declare function v2l4_dup(fd: number): number;
export declare function v4l2_read(fd: number, buf: Buffer, count: number): number;
export declare function v4l2_write(fd: number, buf: Buffer, count: number): number;
export declare function v4l2_set_control(fd: number, cid: number, value: number): number;
export declare function v4l2_get_control(fd: number, cid: number): number;
export declare function v4l2_fd_open(fd: number, v4l2_flags: number): number;
export declare const v4l2_fourcc: (a: string, b: string, c: string, d: string) => number;
export declare function poll(fd: number, timeout: number, events: PollEvents): PollEventResults | null;
export declare function poll_async(fd: number, timeout: number, events: PollEvents): Promise<PollEventResults | null>;
export declare function is_readable(fd: number, timeout: number): boolean;
export declare function is_readable_async(fd: number, timeout: number): Promise<boolean>;
export declare function disable_errors<T extends (...args: any[]) => number>(fn: T): (...args: Parameters<T>) => number;