export declare const ASR_BACKEND_IDS: readonly ['web-speech', 'local-whisper', 'cloud-openai'];
export type AsrBackendId = typeof ASR_BACKEND_IDS[number];
export declare const CLOUD_ASR_PROVIDER_IDS: readonly ['groq', 'deepgram', 'bailian', 'tencent', 'mimo', 'siliconflow', 'volcengine', 'custom'];
export type CloudAsrProviderId = typeof CLOUD_ASR_PROVIDER_IDS[number];
export declare const SILICONFLOW_DEFAULT_MODEL = "FunAudioLLM/SenseVoiceSmall";
/** SiliconFlow `/models` filter that limits the catalog to transcription models. */
export declare const SILICONFLOW_ASR_SUB_TYPE = "speech-to-text";
/** Volcano Engine ASR service ids; the realtime service is one-way streaming recognition. */
export declare const VOLCENGINE_ASR_SERVICE_IDS: readonly ['recording-file', 'realtime'];
export type VolcengineAsrServiceId = typeof VOLCENGINE_ASR_SERVICE_IDS[number];
export declare const VOLCENGINE_ASR_DEFAULT_SERVICE: VolcengineAsrServiceId;
/** `X-Api-Resource-Id` values for one-way streaming recognition; `request.model_name` stays `bigmodel`. The concurrency-billed variants are not exposed: single-user dictation has no concurrency pool to draw on. */
export declare const VOLCENGINE_REALTIME_MODEL_IDS: readonly ['volc.seedasr.sauc.duration', 'volc.bigasr.sauc.duration'];
export type VolcengineRealtimeModelId = typeof VOLCENGINE_REALTIME_MODEL_IDS[number];
export declare const VOLCENGINE_REALTIME_DEFAULT_MODEL: VolcengineRealtimeModelId;
/** Volcano Engine speech API host; shared by the adapter and the registry display endpoint. */
export declare const VOLCENGINE_API_HOST = "openspeech.bytedance.com";
/** `X-Api-Resource-Id` values for big-model recording file recognition. */
export declare const VOLCENGINE_RECORDING_MODEL_IDS: readonly ['volc.seedasr.auc', 'volc.bigasr.auc'];
export type VolcengineRecordingModelId = typeof VOLCENGINE_RECORDING_MODEL_IDS[number];
export declare const VOLCENGINE_RECORDING_DEFAULT_MODEL: VolcengineRecordingModelId;
export declare const MIMO_DEFAULT_MODEL = "mimo-v2.5-asr";
export declare const MIMO_ASR_SERVICE_IDS: readonly ['api', 'token-plan'];
export type MimoAsrServiceId = typeof MIMO_ASR_SERVICE_IDS[number];
export declare const MIMO_ASR_DEFAULT_SERVICE: MimoAsrServiceId;
export declare const MIMO_ASR_CLUSTERS: readonly ['cn', 'sgp', 'ams'];
export type MimoAsrClusterId = typeof MIMO_ASR_CLUSTERS[number];
export declare const MIMO_ASR_DEFAULT_CLUSTER: MimoAsrClusterId;
/** Derive the transcription endpoint for a MiMo access method + cluster (client-safe, no Node globals). */
export declare function mimoEndpoint(service: string, cluster: string): string;
export declare const DEEPGRAM_DEFAULT_MODEL = "nova-3";
export declare const DEEPGRAM_ASR_SERVICE_IDS: readonly ['recording-file', 'realtime'];
export type DeepgramAsrServiceId = typeof DEEPGRAM_ASR_SERVICE_IDS[number];
export declare const DEEPGRAM_ASR_DEFAULT_SERVICE: DeepgramAsrServiceId;
export declare const BAILIAN_MAX_RECORDING_SECONDS = 300;
export declare const TENCENT_DEFAULT_ENGINE = "16k_zh";
export declare const TENCENT_ASR_SERVICE_IDS: readonly ['recording-file', 'realtime'];
export type TencentAsrServiceId = typeof TENCENT_ASR_SERVICE_IDS[number];
export declare const TENCENT_ASR_DEFAULT_SERVICE: TencentAsrServiceId;
export declare const WHISPER_MODEL_IDS: readonly ['tiny', 'base', 'small', 'medium', 'large', 'turbo'];
export type WhisperModelId = typeof WHISPER_MODEL_IDS[number];
export declare const WHISPER_ACCELERATION_IDS: readonly ['default', 'vulkan', 'cuda'];
export type WhisperAccelerationId = typeof WHISPER_ACCELERATION_IDS[number];
export interface RecognitionSettings {
    backend: AsrBackendId | string;
    webSpeech: {
        language: string;
    };
    localWhisper: {
        model: WhisperModelId | string;
        /** `default` is the Host-selected automatic native variant. */
        acceleration: WhisperAccelerationId | string;
        language: string;
    };
    cloudProvider: CloudAsrProviderId | string;
    maxRecordingSeconds: number;
}
export declare const DEFAULT_RECOGNITION_SETTINGS: RecognitionSettings;
export declare function isValidRecordingLimit(value: number): boolean;
/** Empty Web Speech recognition language follows the dsh English/中文 locale. A typed value wins. */
export declare function languageFromUiLocale(locale: string): string;
export declare function effectiveRecognitionLanguage(stored: string, uiLocale: string): string;
export declare function effectiveRecordingSeconds(settings: Pick<RecognitionSettings, 'backend' | 'cloudProvider' | 'maxRecordingSeconds'>): number;