128 lines
2.3 KiB
ReStructuredText
128 lines
2.3 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
|
|
|
|
.. _V4L2-PIX-FMT-YVU410:
|
|
.. _v4l2-pix-fmt-yuv410:
|
|
|
|
**********************************************************
|
|
V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')
|
|
**********************************************************
|
|
|
|
|
|
V4L2_PIX_FMT_YUV410
|
|
Planar formats with ¼ horizontal and vertical chroma resolution, also
|
|
known as YUV 4:1:0
|
|
|
|
|
|
Description
|
|
===========
|
|
|
|
These are planar formats, as opposed to a packed format. The three
|
|
components are separated into three sub-images or planes. The Y plane is
|
|
first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_YVU410``,
|
|
the Cr plane immediately follows the Y plane in memory. The Cr plane is
|
|
¼ the width and ¼ the height of the Y plane (and of the image). Each Cr
|
|
belongs to 16 pixels, a four-by-four square of the image. Following the
|
|
Cr plane is the Cb plane, just like the Cr plane.
|
|
``V4L2_PIX_FMT_YUV410`` is the same, except the Cb plane comes first,
|
|
then the Cr plane.
|
|
|
|
If the Y plane has pad bytes after each row, then the Cr and Cb planes
|
|
have ¼ as many pad bytes after their rows. In other words, four Cx rows
|
|
(including padding) are exactly as long as one Y row (including
|
|
padding).
|
|
|
|
**Byte Order.**
|
|
Each cell is one byte.
|
|
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* - start + 0:
|
|
- Y'\ :sub:`00`
|
|
- Y'\ :sub:`01`
|
|
- Y'\ :sub:`02`
|
|
- Y'\ :sub:`03`
|
|
* - start + 4:
|
|
- Y'\ :sub:`10`
|
|
- Y'\ :sub:`11`
|
|
- Y'\ :sub:`12`
|
|
- Y'\ :sub:`13`
|
|
* - start + 8:
|
|
- Y'\ :sub:`20`
|
|
- Y'\ :sub:`21`
|
|
- Y'\ :sub:`22`
|
|
- Y'\ :sub:`23`
|
|
* - start + 12:
|
|
- Y'\ :sub:`30`
|
|
- Y'\ :sub:`31`
|
|
- Y'\ :sub:`32`
|
|
- Y'\ :sub:`33`
|
|
* - start + 16:
|
|
- Cr\ :sub:`00`
|
|
* - start + 17:
|
|
- Cb\ :sub:`00`
|
|
|
|
|
|
**Color Sample Location:**
|
|
|
|
|
|
|
|
.. flat-table::
|
|
:header-rows: 0
|
|
:stub-columns: 0
|
|
|
|
* -
|
|
- 0
|
|
-
|
|
- 1
|
|
-
|
|
- 2
|
|
-
|
|
- 3
|
|
* - 0
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
* -
|
|
* - 1
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
* -
|
|
-
|
|
-
|
|
-
|
|
- C
|
|
-
|
|
-
|
|
-
|
|
* - 2
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
* -
|
|
* - 3
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|
|
-
|
|
- Y
|