/**
 * @file RTCSessionDescription.ts
 * @description Session Description Protocol (SDP) representation
 * @module sdp/RTCSessionDescription
 *
 * Implements the W3C RTCSessionDescription interface
 * (https://www.w3.org/TR/webrtc/#rtcsessiondescription-class).
 */
/**
 * RTCSdpType - Types of session descriptions
 * @readonly
 * @enum {string}
 */
export declare const RTCSdpType: Readonly<Record<string, string>>;
/**
 * Session description init object.
 */
export interface RTCSessionDescriptionInit {
    type?: string;
    sdp?: string;
}
/**
 * JSON representation of an RTCSessionDescription.
 */
export interface RTCSessionDescriptionJSON {
    type: string | null;
    sdp: string | null;
}
/**
 * @class RTCSessionDescription
 * @description Represents a WebRTC session description (offer/answer)
 *
 * @example
 * const desc = new RTCSessionDescription({
 *   type: 'offer',
 *   sdp: 'v=0\r\no=- 123456 2 IN IP4 127.0.0.1\r\n...'
 * });
 */
export declare class RTCSessionDescription {
    #private;
    /**
     * Create an RTCSessionDescription instance.
     * @param {Object} [init] - Session description init
     * @param {string} [init.type] - SDP type (offer/answer/pranswer/rollback)
     * @param {string} [init.sdp] - SDP string
     */
    constructor(init?: RTCSessionDescriptionInit);
    /**
     * Get the SDP type.
     * @returns {string|null} SDP type
     */
    get type(): string | null;
    /**
     * Set the SDP type.
     * @param {string} value - SDP type
     */
    set type(value: string | null);
    /**
     * Get the SDP string.
     * @returns {string|null} SDP string
     */
    get sdp(): string | null;
    /**
     * Set the SDP string.
     * @param {string} value - SDP string
     */
    set sdp(value: string | null);
    /**
     * Convert to JSON representation.
     * @returns {Object} JSON representation
     */
    toJSON(): RTCSessionDescriptionJSON;
}