Documentation/media/uapi/v4l/pixfmt-y12i.rst

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _V4L2-PIX-FMT-Y12I:
   4
   5 **************************
   6 V4L2_PIX_FMT_Y12I ('Y12I')
   7 **************************
   8
   9 *man V4L2_PIX_FMT_Y12I(2)*
  10
  11 Interleaved grey-scale image, e.g. from a stereo-pair
  12
  13
  14 Description
  15 ===========
  16
  17 This is a grey-scale image with a depth of 12 bits per pixel, but with
  18 pixels from 2 sources interleaved and bit-packed. Each pixel is stored
  19 in a 24-bit word in the little-endian order. On a little-endian machine
  20 these pixels can be deinterlaced using
  21
  22 .. code-block:: c
  23
  24     __u8 *buf;
  25     left0 = 0xfff & *(__u16 *)buf;
  26     right0 = *(__u16 *)(buf + 1) >> 4;
  27
  28 **Bit-packed representation.**
  29 pixels cross the byte boundary and have a ratio of 3 bytes for each
  30 interleaved pixel.
  31
  32 .. flat-table::
  33     :header-rows:  0
  34     :stub-columns: 0
  35     :widths:       2 1 1
  36
  37
  38     -  .. row 1
  39
  40        -  Y'\ :sub:`0left[7:0]`
  41
  42        -  Y'\ :sub:`0right[3:0]`\ Y'\ :sub:`0left[11:8]`
  43
  44        -  Y'\ :sub:`0right[11:4]`