/**
 * AudioVad — voice-activity detection via the server's /v1/audio/vad route.
 *
 * The browser SDK is server-route-only; there is no local C-ABI native
 * execution. This facade POSTs PCM-f32 audio bytes (as base64) to the
 * hosted native backend and returns typed VAD transition events.
 *
 * Python reference: octomil-python/octomil/audio/vad.py
 * Route: POST /v1/audio/vad (octomil-python/octomil/serve/app.py:1423)
 *
 * Request body:
 *   { audio_pcm_f32_base64: string, sample_rate_hz: number, deadline_ms?: number }
 *
 * Response body:
 *   { object: "audio.vad", model: string, sample_rate_hz: number,
 *     transitions: VadTransition[] }
 */
/** A single voice-activity transition event. */
export interface VadTransition {
    /** "speech_start" | "speech_end" — mirrors the native VadTransition.kind. */
    kind: string;
    /** Milliseconds from the start of the audio clip. */
    timestampMs: number;
    /** Detection confidence in [0, 1]. */
    confidence: number;
}
export interface VadDetectRequest {
    /**
     * Raw mono PCM-f32 audio as ArrayBuffer / Uint8Array.
     * The bytes must be float32-LE (matching the native backend expectation).
     */
    audioBytes: ArrayBuffer | Uint8Array;
    /** Sample rate of the audio, in Hz (e.g. 16000). */
    sampleRateHz: number;
    /** Per-request deadline in milliseconds. Defaults to 300 000 server-side. */
    deadlineMs?: number;
}
export interface VadDetectResponse {
    readonly object: "audio.vad";
    readonly model: string;
    readonly sampleRateHz: number;
    readonly transitions: VadTransition[];
}
export declare class AudioVad {
    private readonly serverUrl;
    private readonly apiKey;
    constructor(serverUrl: string, apiKey: string);
    /**
     * Detect voice activity in the provided PCM-f32 audio clip.
     *
     * Sends the audio to the server's /v1/audio/vad endpoint (backed by
     * the native silero-VAD runtime). Returns the sequence of speech-start /
     * speech-end transitions found in the clip.
     */
    detect(request: VadDetectRequest): Promise<VadDetectResponse>;
}
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