import { IReturnResult } from '../../type/base';
export declare const ANALYSER_LOCAL_PREFIX = "LOCAL_PREFIX_";
/**
 * 获取浏览器支持的约束配置字段
 *
 * @returns { MediaTrackConstraints } 约束配置列表
 */
export declare const getSupportConstraints: () => MediaTrackConstraints;
/**
 * 获取Video/Audio的兼容性约束配置
 *
 * @param { MediaTrackConstraints } supportConstraints - 浏览器支持的约束配置列表
 * @param { MediaTrackConstraints } baseConstraint - 通过分辨率匹配的默认约束设置
 * @returns { MediaTrackConstraints | boolean }
 */
export declare const getCompatibleConstraints: (supportConstraints: any, baseConstraint?: any) => any;
/**
 * 针对约束做浏览器兼容检测&合并
 *
 * @param { any } baseConstraints - 基础约束配置列表
 * @returns { MediaStreamConstraints } 合并最终的约束配置
 */
export declare const mergeCompatibleConstraints: (baseConstraints?: any) => {
    video: any;
    audio: any;
};
/**
 * 处理采集视频流错误码
 *
 * @param { any } err - 错误信息
 * @returns { IReturnResult } 错误码
 */
export declare const handleCreateMediaStreamError: (err: any) => {
    code: string;
    msg: string;
    detail: string;
};
/**
 * 处理采集Content桌面流错误码
 *
 * @param { any } err - 错误信息
 * @returns { IReturnResult } 错误码
 */
export declare const handleCreateContentStreamError: (err: any) => IReturnResult;