import type { PerspectiveCamera } from 'three';
import type { PlayerState } from '../core/player-state.js';
import type { VzEventEmitter } from '../core/event-emitter.js';
export type AudioFormat = 'ambix' | 'stereo';
/**
 * Manages audio playback and spatial audio decoding.
 *
 * For standard stereo audio: passes through unchanged.
 * For AmbiX FOA audio: decodes 4-channel ambisonic stream to binaural stereo,
 * rotating the soundfield to match camera orientation each frame.
 */
export declare class AudioManager {
    private state;
    private events;
    private audioContext;
    private sourceNode;
    private ambisonicRenderer;
    private audioFormat;
    private videoElement;
    private initialized;
    constructor(state: PlayerState, events: VzEventEmitter);
    /**
     * Initialize audio processing for a video element.
     * Must be called after a user gesture (click/play) to satisfy autoplay policy.
     */
    init(videoElement: HTMLVideoElement, audioFormat?: AudioFormat): Promise<void>;
    /**
     * Resume AudioContext after user gesture.
     * Browsers require a user interaction before AudioContext can play.
     */
    resume(): Promise<void>;
    /**
     * Update listener orientation from camera.
     * Called each frame from the renderer tick loop.
     */
    updateOrientation(camera: PerspectiveCamera): void;
    /** Get the audio format */
    getAudioFormat(): AudioFormat;
    /** Check if initialized */
    isInitialized(): boolean;
    /** Dispose all audio resources */
    dispose(): void;
}
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