v4l2_format
usbvc_v4l2_get_format(usbvc_state_t *usbvcp, struct v4l2_format *format)
struct v4l2_format fmt;
struct v4l2_format fmt;
static int usbvc_v4l2_set_format(usbvc_state_t *, struct v4l2_format *);
static int usbvc_v4l2_get_format(usbvc_state_t *, struct v4l2_format *);
usbvc_v4l2_set_format(usbvc_state_t *usbvcp, struct v4l2_format *format)
_NOTE(SCHEME_PROTECTS_DATA("unshared data", v4l2_format))
#define VIDIOC_G_FMT _IOWR('V', 4, struct v4l2_format)
#define VIDIOC_S_FMT _IOWR('V', 5, struct v4l2_format)
#define VIDIOC_TRY_FMT _IOWR('V', 64, struct v4l2_format)