testcases/kernel/device-drivers/v4l/user_space/dev_video.h

/*
 * v4l-test: Test environment for Video For Linux Two API
 *
 * 18 Dec 2008  0.1  First release
 *
 * Written by Márton Németh <nm127@freemail.hu>
 * Released under GPL
 */

int open_video(void);
int close_video(void);
int get_video_fd(void);