v4l.c摄像头采集驱动程序，包括各种函数，以及yuv转为bmp文件的函数-v4l.c camera capture driver, including a variety of functions, as well as the yuv into the function of the bmp file

在linux环境下，打开摄像头采集yuyv格式图片，然后转为rgb格式，最后将图片保存为bmp格式输出-In the linux environment, open the camera image acquisition yuyv format, then converted to rgb format, and save the image as bmp format output