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This is a packed grey-scale image format with a depth of 14 bits per pixel. Every four consecutive samples are packed into seven bytes. Each of the first four bytes contain the eight high order bits of the pixels, and the three following bytes contains the six least significants bits of each pixel, in the same order. As the other formats only needed 5 bytes before, append two bytes in the documentation array. Signed-off-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
212 lines
4.3 KiB
ReStructuredText
212 lines
4.3 KiB
ReStructuredText
.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
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.. _yuv-luma-only:
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*****************
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Luma-Only Formats
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*****************
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This family of formats only store the luma component of a Y'CbCr image. They
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are often referred to as greyscale formats.
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.. note::
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- In all the tables that follow, bit 7 is the most significant bit in a byte.
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- Formats are described with the minimum number of pixels needed to create a
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byte-aligned repeating pattern. `...` indicates repetition of the pattern.
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- Y'\ :sub:`x`\ [9:2] denotes bits 9 to 2 of the Y' value for pixel at column
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`x`.
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- `0` denotes padding bits set to 0.
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.. raw:: latex
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\scriptsize
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.. tabularcolumns:: |p{3.6cm}|p{3.0cm}|p{1.3cm}|p{2.6cm}|p{1.3cm}|p{1.3cm}|p{1.3cm}|
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.. flat-table:: Luma-Only Image Formats
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:header-rows: 1
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:stub-columns: 0
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* - Identifier
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- Code
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- Byte 0
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- Byte 1
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- Byte 2
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- Byte 3
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- Byte 4
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- Byte 5
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- Byte 6
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* .. _V4L2-PIX-FMT-GREY:
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- ``V4L2_PIX_FMT_GREY``
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- 'GREY'
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- Y'\ :sub:`0`\ [7:0]
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- ...
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-IPU3-Y10:
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- ``V4L2_PIX_FMT_IPU3_Y10``
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- 'ip3y'
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- Y'\ :sub:`0`\ [7:0]
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- Y'\ :sub:`1`\ [5:0] Y'\ :sub:`0`\ [9:8]
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- Y'\ :sub:`2`\ [3:0] Y'\ :sub:`1`\ [9:6]
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- Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [9:4]
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- Y'\ :sub:`3`\ [9:2]
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y10:
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- ``V4L2_PIX_FMT_Y10``
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- 'Y10 '
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- Y'\ :sub:`0`\ [7:0]
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- `000000` Y'\ :sub:`0`\ [9:8]
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y10BPACK:
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- ``V4L2_PIX_FMT_Y10BPACK``
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- 'Y10B'
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- Y'\ :sub:`0`\ [9:2]
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- Y'\ :sub:`0`\ [1:0] Y'\ :sub:`1`\ [9:4]
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- Y'\ :sub:`1`\ [3:0] Y'\ :sub:`2`\ [9:6]
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- Y'\ :sub:`2`\ [5:0] Y'\ :sub:`3`\ [9:8]
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- Y'\ :sub:`3`\ [7:0]
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y10P:
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- ``V4L2_PIX_FMT_Y10P``
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- 'Y10P'
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- Y'\ :sub:`0`\ [9:2]
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- Y'\ :sub:`1`\ [9:2]
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- Y'\ :sub:`2`\ [9:2]
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- Y'\ :sub:`3`\ [9:2]
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- Y'\ :sub:`3`\ [1:0] Y'\ :sub:`2`\ [1:0] Y'\ :sub:`1`\ [1:0] Y'\ :sub:`0`\ [1:0]
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y12:
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- ``V4L2_PIX_FMT_Y12``
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- 'Y12 '
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- Y'\ :sub:`0`\ [7:0]
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- `0000` Y'\ :sub:`0`\ [11:8]
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y012:
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- ``V4L2_PIX_FMT_Y012``
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- 'Y012'
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- Y'\ :sub:`0`\ [3:0] `0000`
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- Y'\ :sub:`0`\ [11:4]
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y12P:
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- ``V4L2_PIX_FMT_Y12P``
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- 'Y12P'
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- Y'\ :sub:`0`\ [11:4]
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- Y'\ :sub:`1`\ [11:4]
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- Y'\ :sub:`1`\ [3:0] Y'\ :sub:`0`\ [3:0]
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y14:
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- ``V4L2_PIX_FMT_Y14``
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- 'Y14 '
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- Y'\ :sub:`0`\ [7:0]
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- `00` Y'\ :sub:`0`\ [13:8]
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y14P:
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- ``V4L2_PIX_FMT_Y14P``
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- 'Y14P'
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- Y'\ :sub:`0`\ [13:6]
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- Y'\ :sub:`1`\ [13:6]
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- Y'\ :sub:`2`\ [13:6]
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- Y'\ :sub:`3`\ [13:6]
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- Y'\ :sub:`1`\ [1:0] Y'\ :sub:`0`\ [5:0]
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- Y'\ :sub:`2`\ [3:0] Y'\ :sub:`1`\ [5:2]
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- Y'\ :sub:`3`\ [5:0] Y'\ :sub:`2`\ [5:4]
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* .. _V4L2-PIX-FMT-Y16:
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- ``V4L2_PIX_FMT_Y16``
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- 'Y16 '
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- Y'\ :sub:`0`\ [7:0]
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- Y'\ :sub:`0`\ [15:8]
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- ...
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- ...
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- ...
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- ...
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- ...
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* .. _V4L2-PIX-FMT-Y16-BE:
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- ``V4L2_PIX_FMT_Y16_BE``
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- 'Y16 ' | (1U << 31)
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- Y'\ :sub:`0`\ [15:8]
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- Y'\ :sub:`0`\ [7:0]
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- ...
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- ...
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- ...
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- ...
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- ...
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.. raw:: latex
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\normalsize
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.. note::
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For the Y16 and Y16_BE formats, the actual sampling precision may be lower
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than 16 bits. For example, 10 bits per pixel uses values in the range 0 to
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1023. For the IPU3_Y10 format 25 pixels are packed into 32 bytes, which
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leaves the 6 most significant bits of the last byte padded with 0.
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For Y012 and Y12 formats, Y012 places its data in the 12 high bits, with
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padding zeros in the 4 low bits, in contrast to the Y12 format, which has
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its padding located in the most significant bits of the 16 bit word.
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