import { STT } from '../../agents/providers.js';
import type { OpenAISTTModel } from './models.js';
/** Options for {@link OpenAISTT}. */
export type OpenAISTTOptions = {
    /** OpenAI API key. Defaults to the `OPENAI_API_KEY` environment variable. */
    apiKey?: string | null;
    /** Transcription model id. Default `'gpt-4o-transcribe'`. */
    model?: OpenAISTTModel | string;
    /** Spoken language as a BCP-47/ISO code. Default `'en'`. */
    language?: string;
    /** Stream partial transcripts as audio arrives. Default `true`. */
    stream?: boolean;
    /** Sample rate (Hz) of the audio sent in. Default `48000`. */
    inputSampleRate?: number;
    /** Sample rate in Hz that input audio is resampled to. Default `24000`. */
    outputSampleRate?: number;
    /** Optional prompt to bias transcription. Default `null`. */
    prompt?: string | null;
    /** Turn-detection mode. Default `'server_vad'`. */
    turnDetection?: string;
    /** VAD speech-probability threshold. Default `null` (provider default). */
    vadThreshold?: number | null;
    /** Audio padding (ms) prepended before detected speech. Default `null`. */
    vadPrefixPaddingMs?: number | null;
    /** Trailing silence (ms) that ends a turn. Default `null`. */
    vadSilenceDurationMs?: number | null;
    /** Noise-reduction profile, e.g. `'near_field'`/`'far_field'`. Default `'near_field'`. */
    noiseReduction?: string | null;
    /** Transcript response format. Default `'json'`. */
    responseFormat?: string;
    /** Override the API base URL. Default `null`. */
    baseUrl?: string | null;
};
declare class OpenAISTTImpl extends STT {
    static readonly displayName = "OpenAISTT";
    _providerName: string;
    apiKey: string | null;
    model: string;
    language: string;
    stream: boolean;
    inputSampleRate: number;
    outputSampleRate: number;
    prompt: string | null;
    turnDetection: string;
    vadThreshold: number | null;
    vadPrefixPaddingMs: number | null;
    vadSilenceDurationMs: number | null;
    noiseReduction: string | null;
    responseFormat: string;
    baseUrl: string | null;
    constructor(opts?: OpenAISTTOptions);
    getRuntimeConfig(): Record<string, any>;
}
export type OpenAISTT = OpenAISTTImpl;
/** OpenAI speech-to-text (STT) transcriber. */
export declare const OpenAISTT: (opts?: OpenAISTTOptions) => OpenAISTT;
export {};