说明：  hi3510的api说明.用户不用关心内部队建设buffer，通道等复杂的实现细节；针对多种产品形态，提供统一的接口；最终目标：API实现者进行不断的内部优化工作，API调用者把精力更多的集中在产品的应用开发上
(hi3510 s api description. Users do not care about the internal buffer, channel and other complex implementation details a variety of product forms, providing a unified interface the ultimate goal: API to achieve those ongoing internal optimization, API caller to concentrate more of focus on product application development on the)