export interface VoiceParticipant {
    userId: string;
    streamId?: string;
}
export interface VoiceRoute {
    fromUserId: string;
    channelId: string;
    gain: number;
}
/**
 * Signaling seam for voice: who is in a channel and which media stream
 * descriptor they published. The media plane (WebRTC, SFU, or anything else
 * that moves audio bytes) stays behind this seam, host-supplied — the engine
 * never touches it. subscribers delivers the channel roster on every change,
 * starting with the current roster.
 */
export interface VoiceTransport {
    join(channelId: string, streamId?: string): Promise<void>;
    leave(channelId: string): Promise<void>;
    publish(channelId: string, streamId: string): Promise<void>;
    subscribers(channelId: string, onChange: (participants: readonly VoiceParticipant[]) => void): () => void;
}
export declare function createLocalVoiceTransport(options?: {
    userId?: string;
}): {
    transport: VoiceTransport;
    participants(channelId: string): readonly VoiceParticipant[];
};
export type PushToTalkMode = "hold" | "toggle" | "openMic";
export type PushToTalkStatus = "idle" | "keyed" | "open";
export interface PushToTalk {
    mode(): PushToTalkMode;
    setMode(mode: PushToTalkMode): void;
    keyDown(): void;
    keyUp(): void;
    muted(): boolean;
    setMuted(muted: boolean): void;
    status(): PushToTalkStatus;
    transmitting(): boolean;
}
export declare function createPushToTalk(config?: {
    mode?: PushToTalkMode;
    onChange?: (transmitting: boolean) => void;
}): PushToTalk;