import * as grpc from '@grpc/grpc-js';
import { DeepPartial, Voice } from './generated/TTSTypes.js';
import { PhonesetRequest, PhonesetResponse, SpeechRequest, SpeechResponse, TranscriptionRequest, TranscriptionResponse, VoiceListRequest } from './generated/TTSServices.js';
export * from './generated/TTSTypes.js';
export { PhonesetRequest, PhonesetResponse, SpeechRequest, SpeechResponse, SpeechServiceClient, TranscriptionRequest, TranscriptionResponse, VoiceListRequest } from './generated/TTSServices.js';
export type Stream = grpc.ClientReadableStream<SpeechResponse>;
export interface ConnectionOptions {
    /**
     * The Aristech TTS-Server uri e.g. tts.example.com
     */
    host?: string;
    /**
     * Whether to use SSL/TLS. Automatically enabled when rootCert is provided
     */
    ssl?: boolean;
    /**
     * Allows providing a custom root certificate that might not exist
     * in the root certificate chain
     */
    rootCert?: string;
    /**
     * Optionally instead of providing a root cert path via `rootCert` the root cert content can be provided directly
     */
    rootCertContent?: string;
    /**
     * Further grpc client options
     */
    grpcClientOptions?: grpc.ClientOptions;
    /**
     * Authentication options.
     * **Note:** Can only be used in combination with SSL/TLS.
     */
    auth?: {
        token: string;
        secret: string;
    };
}
export declare class TtsClient {
    private cOptions;
    constructor(options: ConnectionOptions);
    /**
     * Lists all available voices.
     */
    listVoices(request?: DeepPartial<VoiceListRequest>): Promise<Array<Voice>>;
    /**
     * Creates a stream of audio data from the given text.
     * @param request The request object
     * @returns A tuple containing the stream and the voice used for the audio generation
     */
    streamAudio(request: DeepPartial<SpeechRequest>): Promise<[Stream, Voice]>;
    /**
     * Creates an audio buffer from the given text.
     * @param request The request object
     * @returns The audio buffer
     */
    synthesize(request: DeepPartial<SpeechRequest>): Promise<Buffer>;
    /**
     * This is an alias for the `synthesize` method.
     */
    audioBuffer(request: DeepPartial<SpeechRequest>): Promise<Buffer>;
    /**
     * Retrieves the phoneset for the given voice.
     * @param request The request object
     * @returns The phoneset response
     */
    getPhoneset(request: DeepPartial<PhonesetRequest>): Promise<PhonesetResponse>;
    /**
     * Retrieves the transcription for the given request.
     * @param request The request object
     * @returns The transcription response
     */
    getTranscription(request: DeepPartial<TranscriptionRequest>): Promise<TranscriptionResponse>;
    private getClient;
}
/**
 * A helper function to create a WAV header for the given audio data.
 * @param dataLength The length of the audio data in bytes
 * @param sampleRate Sample rate in Hz
 * @param numChannels Number of channels
 * @param bitsPerSample Bits per sample
 * @returns The WAV header as a buffer
 */
export declare function createWaveHeader(dataLength: number, sampleRate: number, numChannels: number, bitsPerSample: number): Buffer;