#value_indexed
#enum
#include <sys/time.h>
#include <linux/ioctl.h>
#include <linux/types.h>
#include <linux/videodev2.h>
V4L2_FIELD_ANY			0
V4L2_FIELD_NONE			1
V4L2_FIELD_TOP			2
V4L2_FIELD_BOTTOM		3
V4L2_FIELD_INTERLACED		4
V4L2_FIELD_SEQ_TB		5
V4L2_FIELD_SEQ_BT		6
V4L2_FIELD_ALTERNATE		7
V4L2_FIELD_INTERLACED_TB	8
V4L2_FIELD_INTERLACED_BT	9