Based on kernel version 6.8. Page generated on 2024-03-11 21:26 EST.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 |
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
.. _yuv-luma-only:
*****************
Luma-Only Formats
*****************
This family of formats only store the luma component of a Y'CbCr image. They
are often referred to as greyscale formats.
.. note::
- In all the tables that follow, bit 7 is the most significant bit in a byte.
- Formats are described with the minimum number of pixels needed to create a
byte-aligned repeating pattern. `...` indicates repetition of the pattern.
- Y'\ :sub:`x`\ [9:2] denotes bits 9 to 2 of the Y' value for pixel at column
`x`.
- `0` denotes padding bits set to 0.
.. raw:: latex
\scriptsize
.. tabularcolumns:: |p{3.6cm}|p{3.0cm}|p{1.3cm}|p{2.6cm}|p{1.3cm}|p{1.3cm}|p{1.3cm}|
.. flat-table:: Luma-Only Image Formats
:header-rows: 1
:stub-columns: 0
* - Identifier
- Code
- Byte 0
- Byte 1
- Byte 2
- Byte 3
- Byte 4
* .. _V4L2-PIX-FMT-GREY:
- ``V4L2_PIX_FMT_GREY``
- 'GREY'
- Y'\ :sub:`0`\ [7:0]
- ...
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-IPU3-Y10:
- ``V4L2_PIX_FMT_IPU3_Y10``
- 'ip3y'
- Y'\ :sub:`0`\ [7:0]
- Y'\ :sub:`1`\ [5:0] Y'\ :sub:`0`\ [9:8]
- Y'\ :sub:`2`\ [3:0] Y'\ :sub:`1`\ [9:6]
- Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [9:4]
- Y'\ :sub:`3`\ [9:2]
* .. _V4L2-PIX-FMT-Y10:
- ``V4L2_PIX_FMT_Y10``
- 'Y10 '
- Y'\ :sub:`0`\ [7:0]
- `000000` Y'\ :sub:`0`\ [9:8]
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-Y10BPACK:
- ``V4L2_PIX_FMT_Y10BPACK``
- 'Y10B'
- Y'\ :sub:`0`\ [9:2]
- Y'\ :sub:`0`\ [1:0] Y'\ :sub:`1`\ [9:4]
- Y'\ :sub:`1`\ [3:0] Y'\ :sub:`2`\ [9:6]
- Y'\ :sub:`2`\ [5:0] Y'\ :sub:`3`\ [9:8]
- Y'\ :sub:`3`\ [7:0]
* .. _V4L2-PIX-FMT-Y10P:
- ``V4L2_PIX_FMT_Y10P``
- 'Y10P'
- Y'\ :sub:`0`\ [9:2]
- Y'\ :sub:`1`\ [9:2]
- Y'\ :sub:`2`\ [9:2]
- Y'\ :sub:`3`\ [9:2]
- Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [1:0] Y'\ :sub:`1`\ [1:0] Y'\ :sub:`0`\ [1:0]
* .. _V4L2-PIX-FMT-Y12:
- ``V4L2_PIX_FMT_Y12``
- 'Y12 '
- Y'\ :sub:`0`\ [7:0]
- `0000` Y'\ :sub:`0`\ [11:8]
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-Y012:
- ``V4L2_PIX_FMT_Y012``
- 'Y012'
- Y'\ :sub:`0`\ [3:0] `0000`
- Y'\ :sub:`0`\ [11:4]
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-Y14:
- ``V4L2_PIX_FMT_Y14``
- 'Y14 '
- Y'\ :sub:`0`\ [7:0]
- `00` Y'\ :sub:`0`\ [13:8]
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-Y16:
- ``V4L2_PIX_FMT_Y16``
- 'Y16 '
- Y'\ :sub:`0`\ [7:0]
- Y'\ :sub:`0`\ [15:8]
- ...
- ...
- ...
* .. _V4L2-PIX-FMT-Y16-BE:
- ``V4L2_PIX_FMT_Y16_BE``
- 'Y16 ' | (1U << 31)
- Y'\ :sub:`0`\ [15:8]
- Y'\ :sub:`0`\ [7:0]
- ...
- ...
- ...
.. raw:: latex
\normalsize
.. note::
For the Y16 and Y16_BE formats, the actual sampling precision may be lower
than 16 bits. For example, 10 bits per pixel uses values in the range 0 to
1023. For the IPU3_Y10 format 25 pixels are packed into 32 bytes, which
leaves the 6 most significant bits of the last byte padded with 0.
For Y012 and Y12 formats, Y012 places its data in the 12 high bits, with
padding zeros in the 4 low bits, in contrast to the Y12 format, which has
its padding located in the most significant bits of the 16 bit word.
|
