import type { PredictorService, PredictionService } from "../../services";
import type { Acceleration } from "../../types";
export type SpeechResponseFormat = "aac" | "flac" | "mp3" | "opus" | "pcm" | "wav";
export type SpeechStreamFormat = "audio" | "sse";
export interface SpeechCreateParams {
    /**
     * The text to generate audio for.
     */
    input: string;
    /**
     * Speech generation predictor tag.
     */
    model: string;
    /**
     * The voice to use when generating the audio.
     */
    voice: string;
    /**
     * The format to return audio in.
     */
    response_format?: SpeechResponseFormat;
    /**
     * The speed of the generated audio.
     * Defaults to 1.0.
     */
    speed?: number;
    /**
     * The format to stream the audio in.
     */
    stream_format?: SpeechStreamFormat;
    /**
     * Prediction acceleration.
     */
    acceleration?: Acceleration;
}
export declare class SpeechService {
    private readonly predictors;
    private readonly predictions;
    private readonly cache;
    constructor(predictors: PredictorService, predictions: PredictionService);
    create({ model: tag, input, voice, response_format, speed, stream_format, acceleration }: SpeechCreateParams): Promise<Response>;
    private createDelegate;
}