信息技术.多媒体服务平台技术.第2部分:MPEG可扩展中间件(MXM)API

[中文适用范围]： 本文件规定了一组应用程序编程接口（简称MXM API），以便运行在MPEG-M设备上的MPEG-M应用程序可以访问其中间件中包含的标准多媒体技术作为MPEG-M引擎，如ISO/IEC 23006-1所规定。 MXM API分为两类： — MPEG-M引擎API，即提供对单个MPEG技术（例如视频编码）或一组MPEG技术（如果方便）访问的单个MPEG-M引擎API的集合； — MPEG-M编排器API，即特殊MPEG-M引擎（称为编排器引擎）的API，能够创建MPEG-M引擎链以执行高级应用程序调用，例如“播放视频”，与通常的低级MPEG-M引擎API调用相对。 [外文原描述]： ISO/IEC 23006-2:2016 specifies a set of Application Programming Interfaces (called for short MXM APIs) so that MPEG-M Applications running on an MPEG-M Device can access the standard multimedia technologies contained in its Middleware as MPEG-M Engines, as specified by ISO/IEC 23006‑1. The MXM APIs belong to two classes: - the MPEG-M Engine APIs, i.e. the collection of the individual MPEG-M Engine APIs providing access to a single MPEG technology (e.g. video coding) or to a group of MPEG technologies where this is convenient; - the MPEG-M Orchestrator API, i.e. the API of the special MPEG-M Engine (called Orchestrator Engine) that is capable of creating chains of MPEG-M Engines to execute high-level application calls such as "Play a video", as opposed to the typically low-level MPEG-M Engine API calls.