import { AbstractTTSClient } from "../core/abstract-tts";
import type { SpeakOptions, TTSCredentials, UnifiedVoice } from "../types";
/**
 * AWS Polly TTS credentials
 */
export interface PollyTTSCredentials extends TTSCredentials {
    /**
     * AWS region
     */
    region: string;
    /**
     * AWS access key ID
     */
    accessKeyId: string;
    /**
     * AWS secret access key
     */
    secretAccessKey: string;
}
/**
 * AWS Polly TTS client
 */
export declare class PollyTTSClient extends AbstractTTSClient {
    /**
     * AWS Polly client
     */
    private client;
    /**
     * Create a new AWS Polly TTS client
     * @param credentials AWS credentials
     */
    constructor(credentials: PollyTTSCredentials);
    /**
     * Get available voices from the provider
     * @returns Promise resolving to an array of voice objects
     */
    protected _getVoices(): Promise<any[]>;
    /**
     * Map AWS Polly voice objects to unified format
     * @param rawVoices Array of AWS Polly voice objects
     * @returns Promise resolving to an array of unified voice objects
     */
    protected _mapVoicesToUnified(rawVoices: any[]): Promise<UnifiedVoice[]>;
    /**
     * Prepare SSML for AWS Polly
     * @param text Text or SSML to prepare
     * @param options Synthesis options
     * @returns Prepared SSML
     */
    private prepareSSML;
    /**
     * Convert text to audio bytes
     * @param text Text or SSML to synthesize
     * @param options Synthesis options
     * @returns Promise resolving to audio bytes
     */
    synthToBytes(text: string, options?: SpeakOptions): Promise<Uint8Array>;
    /**
     * Synthesize text to a byte stream with word boundaries
     * @param text Text or SSML to synthesize
     * @param options Synthesis options
     * @returns Promise resolving to a readable stream of audio bytes with word boundaries
     */
    synthToBytestream(text: string, options?: SpeakOptions): Promise<ReadableStream<Uint8Array> | {
        audioStream: ReadableStream<Uint8Array>;
        wordBoundaries: Array<{
            text: string;
            offset: number;
            duration: number;
        }>;
    }>;
    /**
     * Get speech marks (word boundaries) for text
     * @param inputText Text or SSML to get speech marks for
     * @param options Synthesis options
     * @returns Promise resolving to an array of word boundaries
     */
    private getSpeechMarks;
    /**
     * Check if credentials are valid
     * @returns Promise resolving to true if credentials are valid
     */
    checkCredentials(): Promise<boolean>;
}