import type { SpeechToTextClient } from "../../api/resources/speechToText/client/Client";
import { RealtimeConnection } from "./connection";
export declare enum AudioFormat {
    PCM_8000 = "pcm_8000",
    PCM_16000 = "pcm_16000",
    PCM_22050 = "pcm_22050",
    PCM_24000 = "pcm_24000",
    PCM_44100 = "pcm_44100",
    PCM_48000 = "pcm_48000",
    ULAW_8000 = "ulaw_8000"
}
export declare enum CommitStrategy {
    MANUAL = "manual",
    VAD = "vad"
}
interface BaseOptions {
    /**
     * Strategy for committing transcriptions.
     * @default CommitStrategy.MANUAL
     */
    commitStrategy?: CommitStrategy;
    /**
     * Silence threshold in seconds for VAD (Voice Activity Detection).
     * Must be a positive number between 0.3 and 3.0
     */
    vadSilenceThresholdSecs?: number;
    /**
     * Threshold for voice activity detection.
     * Must be between 0.1 and 0.9.
     */
    vadThreshold?: number;
    /**
     * Minimum speech duration in milliseconds.
     * Must be a positive integer between 50 and 2000.
     */
    minSpeechDurationMs?: number;
    /**
     * Minimum silence duration in milliseconds.
     * Must be a positive integer between 50 and 2000.
     */
    minSilenceDurationMs?: number;
    /**
     * Model ID to use for transcription.
     * Must be a valid model ID.
     */
    modelId: string;
    /**
     * An ISO-639-1 or ISO-639-3 language_code corresponding to the language of the audio file.
     * Can sometimes improve transcription performance if known beforehand.
     */
    languageCode?: string;
    /**
     * Whether to receive a committed_transcript_with_timestamps event which includes word-level timestamps.
     * @default false
     */
    includeTimestamps?: boolean;
}
export interface AudioOptions extends BaseOptions {
    audioFormat: AudioFormat;
    sampleRate: number;
    url?: never;
}
/**
 * Options for streaming audio from a URL.
 * @remarks
 * **Node.js only**: Requires ffmpeg to be installed and available in PATH.
 * This will not work in browsers, Deno, or Cloudflare Workers.
 */
export interface UrlOptions extends BaseOptions {
    url: string;
    audioFormat?: never;
    sampleRate?: never;
}
/**
 * Real-time speech-to-text transcription client.
 * @remarks
 * **Node.js only**: This class uses Node.js-specific APIs (WebSocket from 'ws', child_process).
 * It will not work in browsers, Deno, or Cloudflare Workers without modifications.
 */
export declare class ScribeRealtime {
    private options;
    constructor(options?: SpeechToTextClient.Options);
    private getWebSocketUri;
    private checkFfmpegInstalled;
    private buildWebSocketUri;
    /**
     * Establishes a WebSocket connection for real-time speech-to-text transcription.
     *
     * @param options - Configuration options for the connection
     * @returns A promise that resolves to a RealtimeConnection instance
     *
     * @remarks
     * **Node.js only**: This method uses Node.js-specific APIs.
     *
     * When using `UrlOptions` with a URL, ffmpeg must be installed and available in PATH.
     * The SDK will automatically convert the stream to 16kHz mono PCM format.
     *
     * @example
     * ```typescript
     * // Manual audio streaming
     * const connection = await client.speechToText.realtime.connect({
     *     modelId: "scribe_v2_realtime",
     *     audioFormat: AudioFormat.PCM_16000,
     *     sampleRate: 16000,
     * });
     *
     * // Automatic URL streaming (requires ffmpeg)
     * const connection = await client.speechToText.realtime.connect({
     *     modelId: "scribe_v2_realtime",
     *     url: "https://example.com/stream.mp3",
     * });
     * ```
     */
    connect(options: AudioOptions | UrlOptions): Promise<RealtimeConnection>;
    private streamFromUrl;
}
export {};