import { VoiceActor, Talk } from '../../../types';
/**
 * Common interface for voice engines
 */
export interface VoiceEngine {
    /**
     * Get voice data
     * @param input script
     * @param speaker speaker ID
     * @param apiKey API key (if needed)
     * @param voiceActor voice actor information (for NijiVoice)
     * @returns ArrayBuffer of voice data
     */
    fetchAudio(input: Talk, speaker: string, apiKey?: string, voiceActor?: VoiceActor): Promise<ArrayBuffer>;
    /**
     * Get a test message
     * @returns test message
     */
    getTestMessage(textVoiceText?: string): string;
    /**
     * Set custom API endpoint URL
     * @param apiUrl custom API endpoint URL
     */
    setApiEndpoint?(apiUrl: string): void;
}