import type { AsrBackendId } from '../config.js';
import type { BackendState, WhisperModelView } from './settings-controller.js';
export type MicUnavailableReason = {
    kind: 'backend';
    backendId: AsrBackendId;
} | {
    kind: 'model-downloading';
    percent: number | null;
} | {
    kind: 'model-not-downloaded';
};
/** Returns why the microphone is unavailable, or null if ready. */
export declare function micUnavailableReason(backend: AsrBackendId, backendState: BackendState, whisperView: WhisperModelView): MicUnavailableReason | null;