import type { Device, types } from 'mediasoup-client';
import { TrackLabel } from '../types/common';
export declare const detectHandlerName: (userAgent?: string) => types.BuiltinHandlerName | undefined;
export declare const getNewAudioContext: (contextOptions?: AudioContextOptions) => AudioContext | null;
export declare const getSupportedCodecsMimeTypes: (device: Device) => string[];
export declare const isVp9: (codecOrMimeType: string) => boolean;
export declare const isTrackLabel: (value: unknown) => value is TrackLabel;