import { AgoraRteAudioSourceType, AgoraRteMediaSourceState } from '../../type';
import { AgoraRteLoopbackObserver, AgoraRteObservableTrack } from './type';
/**
 * Interface for a loopback audio track in Agora RTE SDK.
 */
export interface AgoraRteLoopbackTrack extends AgoraRteObservableTrack<AgoraRteLoopbackObserver> {
    /**
     * Gets the device ID of the loopback audio track.
     * @returns The device ID of the loopback audio track.
     */
    getDeviceId(): string;
    /**
     * Gets the state of the loopback audio track.
     * @returns The state of the loopback audio track.
     */
    getState(): AgoraRteMediaSourceState;
    /**
     * Gets the audio source type of the loopback audio track.
     */
    getAudioSourceType(): AgoraRteAudioSourceType;
    /**
     * Starts the loopback audio track.
     */
    start(): number;
    /**
     * Stops the loopback audio track.
     */
    stop(): number;
    /**
     * Updates the signal volume for the loopback audio track.
     * @param volume The volume level to set.
     */
    adjustVolume(volume: number): number;
}