export declare const DEFAULTS: {
    rmsEmaAlpha: number;
    noiseEmaAlpha: number;
    thresholdOffset: number;
    activityWindowMs: number;
    holdMs: number;
};
type SpeakerId = number;
interface FrameInput {
    id: SpeakerId;
    rms: number;
    timestamp: number;
}
export interface SpeakerState {
    streamId: number;
    emaRms: number;
    noiseFloor: number;
    lastAboveThresholdTs: number;
    activeSince: number;
    active: boolean;
}
interface ActiveSpeakerDetectorOptions {
    rmsEmaAlpha: number;
    noiseEmaAlpha: number;
    thresholdOffset: number;
    activityWindowMs: number;
    holdMs: number;
}
export declare class ActiveSpeakerDetector {
    private opts;
    private speakers;
    private activeSpeaker;
    constructor(opts: ActiveSpeakerDetectorOptions);
    onFrame({ id, rms, timestamp }: FrameInput): SpeakerState[];
    private selectActiveSpeakers;
    private getOrCreateState;
}
export {};