Documentation/media/uapi/v4l/pixfmt-nv24.rst

   1 .. -*- coding: utf-8; mode: rst -*-
   2
   3 .. _V4L2-PIX-FMT-NV24:
   4 .. _V4L2-PIX-FMT-NV42:
   5
   6 ******************************************************
   7 V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')
   8 ******************************************************
   9
  10 V4L2_PIX_FMT_NV42
  11 Formats with full horizontal and vertical chroma resolutions, also known
  12 as YUV 4:4:4. One luminance and one chrominance plane with alternating
  13 chroma samples as opposed to ``V4L2_PIX_FMT_YVU420``
  14
  15
  16 Description
  17 ===========
  18
  19 These are two-plane versions of the YUV 4:4:4 format. The three
  20 components are separated into two sub-images or planes. The Y plane is
  21 first, with each Y sample stored in one byte per pixel. For
  22 ``V4L2_PIX_FMT_NV24``, a combined CbCr plane immediately follows the Y
  23 plane in memory. The CbCr plane has the same width and height, in
  24 pixels, as the Y plane (and the image). Each line contains one CbCr pair
  25 per pixel, with each Cb and Cr sample stored in one byte.
  26 ``V4L2_PIX_FMT_NV42`` is the same except that the Cb and Cr samples are
  27 swapped, the CrCb plane starts with a Cr sample.
  28
  29 If the Y plane has pad bytes after each row, then the CbCr plane has
  30 twice as many pad bytes after its rows.
  31
  32 **Byte Order.**
  33 Each cell is one byte.
  34
  35
  36 .. flat-table::
  37     :header-rows:  0
  38     :stub-columns: 0
  39
  40     -  .. row 1
  41
  42        -  start + 0:
  43
  44        -  Y'\ :sub:`00`
  45
  46        -  Y'\ :sub:`01`
  47
  48        -  Y'\ :sub:`02`
  49
  50        -  Y'\ :sub:`03`
  51
  52     -  .. row 2
  53
  54        -  start + 4:
  55
  56        -  Y'\ :sub:`10`
  57
  58        -  Y'\ :sub:`11`
  59
  60        -  Y'\ :sub:`12`
  61
  62        -  Y'\ :sub:`13`
  63
  64     -  .. row 3
  65
  66        -  start + 8:
  67
  68        -  Y'\ :sub:`20`
  69
  70        -  Y'\ :sub:`21`
  71
  72        -  Y'\ :sub:`22`
  73
  74        -  Y'\ :sub:`23`
  75
  76     -  .. row 4
  77
  78        -  start + 12:
  79
  80        -  Y'\ :sub:`30`
  81
  82        -  Y'\ :sub:`31`
  83
  84        -  Y'\ :sub:`32`
  85
  86        -  Y'\ :sub:`33`
  87
  88     -  .. row 5
  89
  90        -  start + 16:
  91
  92        -  Cb\ :sub:`00`
  93
  94        -  Cr\ :sub:`00`
  95
  96        -  Cb\ :sub:`01`
  97
  98        -  Cr\ :sub:`01`
  99
 100        -  Cb\ :sub:`02`
 101
 102        -  Cr\ :sub:`02`
 103
 104        -  Cb\ :sub:`03`
 105
 106        -  Cr\ :sub:`03`
 107
 108     -  .. row 6
 109
 110        -  start + 24:
 111
 112        -  Cb\ :sub:`10`
 113
 114        -  Cr\ :sub:`10`
 115
 116        -  Cb\ :sub:`11`
 117
 118        -  Cr\ :sub:`11`
 119
 120        -  Cb\ :sub:`12`
 121
 122        -  Cr\ :sub:`12`
 123
 124        -  Cb\ :sub:`13`
 125
 126        -  Cr\ :sub:`13`
 127
 128     -  .. row 7
 129
 130        -  start + 32:
 131
 132        -  Cb\ :sub:`20`
 133
 134        -  Cr\ :sub:`20`
 135
 136        -  Cb\ :sub:`21`
 137
 138        -  Cr\ :sub:`21`
 139
 140        -  Cb\ :sub:`22`
 141
 142        -  Cr\ :sub:`22`
 143
 144        -  Cb\ :sub:`23`
 145
 146        -  Cr\ :sub:`23`
 147
 148     -  .. row 8
 149
 150        -  start + 40:
 151
 152        -  Cb\ :sub:`30`
 153
 154        -  Cr\ :sub:`30`
 155
 156        -  Cb\ :sub:`31`
 157
 158        -  Cr\ :sub:`31`
 159
 160        -  Cb\ :sub:`32`
 161
 162        -  Cr\ :sub:`32`
 163
 164        -  Cb\ :sub:`33`
 165
 166        -  Cr\ :sub:`33`