V4L2_FWHT_FL_PIXENC_OFFSET
#define V4L2_FWHT_FL_PIXENC_YUV (1 << V4L2_FWHT_FL_PIXENC_OFFSET)
#define V4L2_FWHT_FL_PIXENC_RGB (2 << V4L2_FWHT_FL_PIXENC_OFFSET)
#define V4L2_FWHT_FL_PIXENC_HSV (3 << V4L2_FWHT_FL_PIXENC_OFFSET)