Training courses

Kernel and Embedded Linux

Bootlin training courses

Embedded Linux, kernel,
Yocto Project, Buildroot, real-time,
graphics, boot time, debugging...

Bootlin logo

Elixir Cross Referencer

Open Menu /Documentation/media/uapi/v4l/pixfmt-nv16m.rst 
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
.. -*- coding: utf-8; mode: rst -*-

.. _V4L2-PIX-FMT-NV16M:
.. _v4l2-pix-fmt-nv61m:

********************************************************
V4L2_PIX_FMT_NV16M ('NM16'), V4L2_PIX_FMT_NV61M ('NM61')
********************************************************

V4L2_PIX_FMT_NV61M
Variation of ``V4L2_PIX_FMT_NV16`` and ``V4L2_PIX_FMT_NV61`` with planes
non contiguous in memory.


Description
===========

This is a multi-planar, two-plane version of the YUV 4:2:2 format. The
three components are separated into two sub-images or planes.
``V4L2_PIX_FMT_NV16M`` differs from ``V4L2_PIX_FMT_NV16`` in that the
two planes are non-contiguous in memory, i.e. the chroma plane does not
necessarily immediately follow the luma plane. The luminance data
occupies the first plane. The Y plane has one byte per pixel. In the
second plane there is chrominance data with alternating chroma samples.
The CbCr plane is the same width and height, in bytes, as the Y plane.
Each CbCr pair belongs to two pixels. For example,
Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`.
``V4L2_PIX_FMT_NV61M`` is the same as ``V4L2_PIX_FMT_NV16M`` except the
Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte.

``V4L2_PIX_FMT_NV16M`` and ``V4L2_PIX_FMT_NV61M`` are intended to be
used only in drivers and applications that support the multi-planar API,
described in :ref:`planar-apis`.

**Byte Order.**
Each cell is one byte.


.. flat-table::
    :header-rows:  0
    :stub-columns: 0

    * - start0 + 0:
      - Y'\ :sub:`00`
      - Y'\ :sub:`01`
      - Y'\ :sub:`02`
      - Y'\ :sub:`03`
    * - start0 + 4:
      - Y'\ :sub:`10`
      - Y'\ :sub:`11`
      - Y'\ :sub:`12`
      - Y'\ :sub:`13`
    * - start0 + 8:
      - Y'\ :sub:`20`
      - Y'\ :sub:`21`
      - Y'\ :sub:`22`
      - Y'\ :sub:`23`
    * - start0 + 12:
      - Y'\ :sub:`30`
      - Y'\ :sub:`31`
      - Y'\ :sub:`32`
      - Y'\ :sub:`33`
    * -
    * - start1 + 0:
      - Cb\ :sub:`00`
      - Cr\ :sub:`00`
      - Cb\ :sub:`02`
      - Cr\ :sub:`02`
    * - start1 + 4:
      - Cb\ :sub:`10`
      - Cr\ :sub:`10`
      - Cb\ :sub:`12`
      - Cr\ :sub:`12`
    * - start1 + 8:
      - Cb\ :sub:`20`
      - Cr\ :sub:`20`
      - Cb\ :sub:`22`
      - Cr\ :sub:`22`
    * - start1 + 12:
      - Cb\ :sub:`30`
      - Cr\ :sub:`30`
      - Cb\ :sub:`32`
      - Cr\ :sub:`32`


**Color Sample Location..**



.. flat-table::
    :header-rows:  0
    :stub-columns: 0

    * -
      - 0
      -
      - 1
      - 2
      -
      - 3
    * - 0
      - Y
      -
      - Y
      - Y
      -
      - Y
    * -
      -
      - C
      -
      -
      - C
      -
    * - 1
      - Y
      -
      - Y
      - Y
      -
      - Y
    * -
      -
      - C
      -
      -
      - C
      -
    * -
    * - 2
      - Y
      -
      - Y
      - Y
      -
      - Y
    * -
      -
      - C
      -
      -
      - C
      -
    * - 3
      - Y
      -
      - Y
      - Y
      -
      - Y
    * -
      -
      - C
      -
      -
      - C
      -