import { LitElement } from 'lit';
import type { Call, DeviceController } from '../types/index.js';
/**
 * Context provider element that bridges an external `Call` and/or
 * `DeviceController` into Lit context so any descendant web component
 * (sw-call-media, sw-call-controls, sw-participants, etc.) receives live
 * state without manual property wiring.
 *
 * Usage:
 *   ```html
 *   <sw-call-provider id="provider">
 *     <sw-call-media></sw-call-media>
 *     <sw-call-controls></sw-call-controls>
 *   </sw-call-provider>
 *   ```
 *   ```js
 *   provider.call = activeCall;
 *   provider.deviceController = signalWireClient;
 *   ```
 *
 * @prop {Call}             call             - Active call object
 * @prop {DeviceController} deviceController - Device controller for input/output device management
 *
 * @slot - Default slot. Descendants consume the provided contexts.
 */
export declare class SwCallProvider extends LitElement {
    static styles: import("lit").CSSResult;
    call: Call | undefined;
    deviceController: DeviceController | undefined;
    private _callState;
    private _devices;
    protected updated(changed: Map<string, unknown>): void;
    disconnectedCallback(): void;
    render(): import("lit-html").TemplateResult<1>;
}
declare global {
    interface HTMLElementTagNameMap {
        'sw-call-provider': SwCallProvider;
    }
}
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