import type { VoiceEmbedding } from "../voice/types.js";
export interface SynthesisCacheOptions {
    /**
     * How many rendered chunks to keep per voice before evicting the least
     * recently used one.
     *
     * @defaultValue 32
     */
    maxEntriesPerVoice?: number;
}
/**
 * LRU cache of rendered audio, keyed by voice identity, text, speed and
 * expressiveness.
 *
 * Voices are compared by object identity (the `VoiceEmbedding` instance held
 * by `VoxShot`), so re-cloning the same reference audio starts a fresh cache.
 * Entries are held through a `WeakMap`, so dropping a voice frees its audio.
 */
export declare class SynthesisCache {
    #private;
    constructor(options?: SynthesisCacheOptions);
    get(voice: VoiceEmbedding, text: string, speed: number, expressiveness?: number): Float32Array | undefined;
    set(voice: VoiceEmbedding, text: string, speed: number, samples: Float32Array, expressiveness?: number): void;
}
//# sourceMappingURL=synthesis-cache.d.ts.map