/**
 * Single source of truth for the `"ipv4"` / `"ipv6"` -> `node:dgram` translations the FFmpeg subsystem needs.
 *
 * Every call site in the FFmpeg subsystem that needs the ipFamily -> node:dgram translation routes through the table lookups exported here, rather than
 * hand-rolling `ipFamily === "ipv6" ? "udp6" : "udp4"` or `isIPv6 ? "::1" : "127.0.0.1"` inline. Keeping the mapping centralized means a future addition
 * (dual-stack socket types, SO_REUSEADDR flags, alternative loopback addresses in constrained test environments) has exactly one file to update, and
 * consumers - production or test - share the same vocabulary.
 *
 * @module
 */
import type { Socket } from "node:dgram";
/**
 * The two IP families the FFmpeg subsystem supports. Centralized here so consumers in `rtp.ts`, `stream.ts`, and the test fixtures share the same union rather than
 * re-declaring inline unions at every init-type boundary.
 *
 * @category FFmpeg
 */
export type IpFamily = "ipv4" | "ipv6";
declare const LOOPBACK_ADDRESS: {
    readonly ipv4: "127.0.0.1";
    readonly ipv6: "::1";
};
/**
 * Resolve the loopback address string for the supplied IP family. The returned literal is suitable for passing to `socket.bind(port, address)` or
 * `socket.send(..., address, ...)`.
 *
 * @param ipFamily - The IP family to resolve.
 *
 * @returns `"127.0.0.1"` for `"ipv4"` or `"::1"` for `"ipv6"`.
 *
 * @category FFmpeg
 */
export declare function loopbackAddress(ipFamily: IpFamily): (typeof LOOPBACK_ADDRESS)[IpFamily];
/**
 * Create a `node:dgram` socket for the supplied IP family. Equivalent to `createSocket("udp4")` / `createSocket("udp6")` but routes the family -> socket-type lookup
 * through the single table above, so every call site shares one mapping.
 *
 * @param ipFamily - The IP family for the new socket.
 *
 * @returns A fresh unbound {@link Socket}.
 *
 * @category FFmpeg
 */
export declare function createDgramSocket(ipFamily: IpFamily): Socket;
export {};
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