V4L2 is a major feature of the Linux kernel Version 2.6, which mainly provides the kernel driver of video equipment. This paper introduces driver model of V4L2 first, and analyzes the webcam driver of MediaTek Inc’s MT6229 chip according it. The memory mapping techniques of multi frame cache is adopted to increasing the speed of image acquisition greatly .Finally,the program is planted into the development board of EmbedSky TQ2440 and gives testing process under the network environment.There are is an impor...
【更新日期】
2010-06-30
【分类号】
TP316.81
【正文快照】
V4L2(Video For Linux Two)[1]是Linux内核中关于视频设备的API接口,主要用来对视频设备进行开关、采集、输出等操作。在嵌入式系统中多采用Linux作为其软件平台,V4L2是Linux2.6采用的内核驱动模型[2],与之前版本的V4L存在很大差别,因而有部分视频设备的驱动还无法支持新版本的
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