/**
 * Primes the document with an active microphone stream.
 *
 * Opens (and immediately stops) a media stream so the document holds an
 * active mic permission for this session. In Firefox this is what makes
 * real deviceIds and labels appear in subsequent enumerateDevices() calls.
 * Throws early if the user has already denied permission.
 *
 * @returns A promise that resolves once the stream has been opened and stopped.
 * @throws Error if microphone access is denied or unavailable.
 */
export declare function primeMicStream(): Promise<void>;
/**
 * Retrieves available audio input devices.
 *
 * Enumerates devices first; if the result looks like Firefox's pre-permission
 * placeholder (an entry with empty deviceId/label even though the Permissions
 * API reports access), primes the document with getUserMedia and re-enumerates.
 * Browsers that already return populated entries (Chrome, Safari) skip the
 * priming call entirely.
 *
 * @returns A promise that resolves with an object containing:
 *  - `devices`: an array of MediaDeviceInfo objects for audio inputs.
 *  - `defaultDevice`: the first audio input device, if available.
 * @throws Error if mediaDevices API is unavailable or device enumeration fails.
 */
export declare function getAudioDevices(): Promise<{
    devices: MediaDeviceInfo[];
    defaultDevice?: MediaDeviceInfo;
}>;