// ITU-R 601 -- broadcast NTSC/PAL
const V4L2_COLORSPACE_SMPTE170M = 1

// 1125-Line (US) HDTV
const V4L2_COLORSPACE_SMPTE240M = 2

// HD and modern captures.
const V4L2_COLORSPACE_REC709 = 3

// broken BT878 extents (601, luma range 16-253 instead of 16-235)
const V4L2_COLORSPACE_BT878 = 4

// These should be useful.  Assume 601 extents.
const V4L2_COLORSPACE_470_SYSTEM_M = 5
const V4L2_COLORSPACE_470_SYSTEM_BG = 6

// I know there will be cameras that send this.  So, this is
// unspecified chromaticities and full 0-255 on each of the
// Y'CbCr components
const V4L2_COLORSPACE_JPEG = 7

// For RGB colourspaces, this is probably a good start.
const V4L2_COLORSPACE_SRGB = 8

const V4L2_FIELD_ANY = 0
// driver can choose from none, top, bottom, interlaced
// depending on whatever it thinks is approximate ...
const V4L2_FIELD_NONE = 1
// this device has no fields ...
const V4L2_FIELD_TOP = 2
// top field only
const V4L2_FIELD_BOTTOM = 3
// bottom field only
const V4L2_FIELD_INTERLACED = 4
// both fields interlaced
const V4L2_FIELD_SEQ_TB = 5
// both fields sequential into one
// buffer, top-bottom order
const V4L2_FIELD_SEQ_BT = 6
// same as above + bottom-top order
const V4L2_FIELD_ALTERNATE = 7
// both fields alternating into separate buffers
const V4L2_FIELD_INTERLACED_TB = 8
// both fields interlaced, top field
// first and the top field is transmitted first
const V4L2_FIELD_INTERLACED_BT = 9
// both fields interlaced, top field
// first and the bottom field is transmitted first