/**
 * The SoundManager is used to load and play audio. It also applies system-wide settings like
 * global volume, suspend and resume.
 *
 * There is one per application at `app.soundManager`. It owns the Web Audio `context` that
 * every {@link SoundInstance} plays through and the listener from which positional sounds are
 * heard, applies the master {@link volume} on top of each instance's own, and `suspend` and
 * `resume` silence and restart all audio at once, for example when the page loses focus.
 *
 * @category Sound
 */
export class SoundManager extends EventHandler {
    /**
     * @type {AudioContext|null}
     * @private
     */
    private _context;
    /**
     * @type {() => void}
     * @private
     */
    private _unlockHandlerFunc;
    /** @private */
    private _userSuspended;
    /**
     * The listener associated with this manager.
     *
     * @type {Listener}
     */
    listener: Listener;
    /** @private */
    private _volume;
    /**
     * Sets the global volume for the manager. All {@link SoundInstance}s will scale their volume
     * with this volume. Valid between [0, 1].
     *
     * @type {number}
     */
    set volume(volume: number);
    /**
     * Gets the global volume for the manager.
     *
     * @type {number}
     */
    get volume(): number;
    get suspended(): boolean;
    /**
     * Get the Web Audio API context. Returns null if the environment does not support the Web
     * Audio API.
     *
     * @type {AudioContext|null}
     * @ignore
     */
    get context(): AudioContext | null;
    suspend(): void;
    resume(): void;
    destroy(): void;
    _resume(): void;
    _suspend(): void;
    _unlockHandler(): void;
    _registerUnlockListeners(): void;
    _removeUnlockListeners(): void;
}
import { EventHandler } from '../../core/event-handler.js';
import { Listener } from './listener.js';