import AudioMixObserver from '../audiomixobserver/AudioMixObserver';
import AudioMixControllerFacade from './AudioMixControllerFacade';
/**
 * An instance of [[AudioMixController]] is provided when constructing a
 * [[MeetingClient]] to allow for binding audio output.
 */
export default interface AudioMixController extends AudioMixControllerFacade {
    /**
     * Called when the audio mix element can be bound to a device and stream.
     */
    bindAudioElement(element: HTMLAudioElement): Promise<void>;
    /**
     * Called to unbind the audio element so that the audio output stream does not have a sink.
     */
    unbindAudioElement(): void;
    /**
     * Called when the audio mix stream can be bound to a device and element.
     *
     * This method rejects if you specify a device and the browser does not support `setSinkId`;
     * use {@link BrowserBehavior.supportsSetSinkId} to check before calling this method.
     */
    bindAudioStream(stream: MediaStream): Promise<void>;
    /**
     * Called when the audio mix device can be bound to an element and stream.
     *
     * This method rejects if you specify a device and the browser does not support `setSinkId`;
     * use {@link BrowserBehavior.supportsSetSinkId} to check before calling this method.
     */
    bindAudioDevice(device: MediaDeviceInfo | null): Promise<void>;
    /**
     * Returns the meeting audio stream currently bound to a HTMLAudioElement, or `null` if
     * there is no current audio stream. This method will typically never reject.
     */
    getCurrentMeetingAudioStream(): Promise<MediaStream | null>;
    /**
     * Add an observer to listen for changes to the current meeting audio stream. The observer
     * will be notified when a stream is bound or unbound from an audio element in the page.
     */
    addAudioMixObserver(observer: AudioMixObserver): void;
    /**
     * Remove an observer to stop listening for changes to the current meeting audio stream.
     */
    removeAudioMixObserver(observer: AudioMixObserver): void;
}