export type SpeechActivityEvent = 'started' | 'ended';
export interface SpeechActivityEventData {
    event: SpeechActivityEvent;
}
export interface EngineStateEventData {
    isPlayoutEnabled: boolean;
    isRecordingEnabled: boolean;
}
export interface AudioProcessingStateEventData {
    voiceProcessingEnabled: boolean;
    voiceProcessingBypassed: boolean;
    voiceProcessingAGCEnabled: boolean;
    stereoPlayoutEnabled: boolean;
}
export type AudioDeviceModuleEventData = SpeechActivityEventData | EngineStateEventData | AudioProcessingStateEventData | Record<string, never>;
/**
 * Event emitter for RTCAudioDeviceModule delegate callbacks.
 * Speech activity events are supported on iOS, macOS, and Android.
 * Engine/audio-processing-state events remain iOS/macOS only.
 */
declare class AudioDeviceModuleEventEmitter {
    private eventEmitter;
    setupListeners(): void;
    /**
     * Subscribe to speech activity events (started/ended).
     * Supported on iOS, macOS, and Android.
     */
    addSpeechActivityListener(listener: (data: SpeechActivityEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to devices updated event (input/output devices changed)
     */
    addDevicesUpdatedListener(listener: () => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to audio processing state updated event
     */
    addAudioProcessingStateUpdatedListener(listener: (data: AudioProcessingStateEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine created event
     */
    addEngineCreatedListener(listener: () => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine will enable event
     */
    addEngineWillEnableListener(listener: (data: EngineStateEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine will start event
     */
    addEngineWillStartListener(listener: (data: EngineStateEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine did stop event
     */
    addEngineDidStopListener(listener: (data: EngineStateEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine did disable event
     */
    addEngineDidDisableListener(listener: (data: EngineStateEventData) => void): import("react-native").EmitterSubscription;
    /**
     * Subscribe to engine will release event
     */
    addEngineWillReleaseListener(listener: () => void): import("react-native").EmitterSubscription;
}
export declare const audioDeviceModuleEvents: AudioDeviceModuleEventEmitter;
export {};