import { Signal } from "@moq/signals";
import { Track } from "./track";
/** A track a subscriber asked for, along with its requested delivery priority. */
export interface TrackRequest {
    track: Track;
    priority: number;
}
/** Reactive backing state for a {@link Broadcast}: requested tracks plus a closed flag. */
export declare class BroadcastState {
    requested: Signal<TrackRequest[]>;
    closed: Signal<boolean | Error>;
}
/**
 * Handles writing and managing tracks in a broadcast.
 *
 * @public
 */
export declare class Broadcast {
    /** Reactive backing state. */
    state: BroadcastState;
    /** Resolves with the abort error (or undefined) once closed. */
    readonly closed: Promise<Error | undefined>;
    constructor();
    /**
     * A track requested over the network.
     */
    requested(): Promise<TrackRequest | undefined>;
    /**
     * Populates the provided track over the network.
     */
    subscribe(name: string, priority: number): Track;
    /**
     * Closes the writer and all associated tracks.
     *
     * @param abort - If provided, throw this exception instead of returning undefined.
     */
    close(abort?: Error): void;
}
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