基于V4L2的视频设备驱动开发  

Video driver development based on V4L2

作　　者：徐家[1] 陈奇[1] 

机构地区：[1]浙江大学计算机科学与技术学院,浙江杭州310027

出　　处：《计算机工程与设计》2010年第16期3569-3572,共4页Computer Engineering and Design

摘　　要：在嵌入式系统上,特别是系统资源相对较少的情况下,良好的驱动结构设计能够有效地减少驱动的内存和CPU占用量,从而提高系统性能。V4L2是Linux下视频设备驱动开发的新框架,深入分析了V4L2的运行机制,在充分利用其特性的基础上,从减少系统资源消耗和提高驱动性能的角度出发,给出了一套有效的视频设备V4L2驱动开发方法。实验结果表明了该方法的有效性。In embedded system,especially with low system resources,good driver structural design can effectively reduce memory and CPU occupation,hence improve the system’s performance.V4L2 is a new framework for video device driver development under Linux,and a in-depth study on the running mechanism of V4L2 is given.By making full use of its properties,a V4L2 driver develop method is presented for video device based on reducing system resource consumption and promoting driver’s behavior,and its validity is proven by experiment.

关 键 词：V4L2 LINUX 视频设备 驱动性能 资源消耗 

分 类 号：TP316[自动化与计算机技术—计算机软件与理论] TP311[自动化与计算机技术—计算机科学与技术]