controls.h

sonic_snap是linux下的看webcam图像的软件

extern bool controls_enumerate(int fd);

extern void controls_set_gain(int fd, int val);

extern int  controls_get_gain(int fd);

extern int  controls_get_max_gain(int fd);

extern void controls_set_jpegcompr(int fd, int v);

extern int  controls_get_jpegcompr(int fd);