import { CachedAudio } from "./types";
/**
 * Implementation of CachedAudio interface using class-based approach to avoid closure risks.
 * Supports reference counting to track active usage.
 */
export declare class CachedAudioImpl implements CachedAudio {
    private readonly audioBuffer;
    private alive;
    private refCount;
    constructor(audioBuffer: AudioBuffer);
    /**
     * Increment the reference count. Called when a token starts using this audio.
     */
    addRef(): void;
    /**
     * Decrement the reference count. Called when a token stops using this audio.
     */
    releaseRef(): void;
    /**
     * Get the current reference count.
     */
    getRefCount(): number;
    /**
     * Unload the cached audio. Will fail silently if tokens are still playing.
     */
    unload(): Promise<void>;
    /**
     * Force unload the cached audio, even if tokens are still playing.
     */
    forceUnload(): Promise<void>;
    /**
     * Check if the cached audio is still valid.
     */
    isAlive(): boolean;
    /**
     * Get the raw audio buffer.
     */
    raw(): AudioBuffer;
}