2016-06-30 16:18:56 +03:00
|
|
|
.. -*- coding: utf-8; mode: rst -*-
|
|
|
|
|
|
|
|
|
|
.. _V4L2-PIX-FMT-NV24:
|
2016-07-07 22:16:21 +03:00
|
|
|
.. _V4L2-PIX-FMT-NV42:
|
2016-06-30 16:18:56 +03:00
|
|
|
|
|
|
|
|
******************************************************
|
|
|
|
|
V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42')
|
|
|
|
|
******************************************************
|
|
|
|
|
|
|
|
|
|
V4L2_PIX_FMT_NV42
|
|
|
|
|
Formats with full horizontal and vertical chroma resolutions, also known
|
|
|
|
|
as YUV 4:4:4. One luminance and one chrominance plane with alternating
|
|
|
|
|
chroma samples as opposed to ``V4L2_PIX_FMT_YVU420``
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Description
|
|
|
|
|
===========
|
|
|
|
|
|
|
|
|
|
These are two-plane versions of the YUV 4:4:4 format. The three
|
|
|
|
|
components are separated into two sub-images or planes. The Y plane is
|
|
|
|
|
first, with each Y sample stored in one byte per pixel. For
|
|
|
|
|
``V4L2_PIX_FMT_NV24``, a combined CbCr plane immediately follows the Y
|
|
|
|
|
plane in memory. The CbCr plane has the same width and height, in
|
|
|
|
|
pixels, as the Y plane (and the image). Each line contains one CbCr pair
|
|
|
|
|
per pixel, with each Cb and Cr sample stored in one byte.
|
|
|
|
|
``V4L2_PIX_FMT_NV42`` is the same except that the Cb and Cr samples are
|
|
|
|
|
swapped, the CrCb plane starts with a Cr sample.
|
|
|
|
|
|
|
|
|
|
If the Y plane has pad bytes after each row, then the CbCr plane has
|
|
|
|
|
twice as many pad bytes after its rows.
|
|
|
|
|
|
2016-07-04 19:58:01 +03:00
|
|
|
**Byte Order.**
|
2016-06-30 16:18:56 +03:00
|
|
|
Each cell is one byte.
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
.. flat-table::
|
|
|
|
|
:header-rows: 0
|
|
|
|
|
:stub-columns: 0
|
|
|
|
|
|
[media] v4l: doc: Remove row numbers from tables
Shorten the tables by removing row numbers in comments, allowing for
later insertion of rows with minimal diffs.
All changes have been generated by the following script.
import io
import re
import sys
def process_table(fname, data):
if fname.endswith('hist-v4l2.rst'):
data = re.sub(u'\n{1,2}\t( ?) -( ?) ?', u'\n\t\\1 -\\2', data, flags = re.MULTILINE)
data = re.sub(u'\n(\t| )- \.\. row [0-9]+\n\t ?-( ?) ?', u'\\1* -\\2', data, flags = re.MULTILINE)
else:
data = re.sub(u'\n{1,2} -( ?) ?', u'\n -\\1', data, flags = re.MULTILINE)
data = re.sub(u'(\n?)(\n\n - \.\. row 1\n)', u'\n\\2', data, flags = re.MULTILINE)
data = re.sub(u'\n - \.\. row [0-9]+\n -( ?) ?', u' * -\\1', data, flags = re.MULTILINE)
data = re.sub(u'\n - \.\. row [0-9]+\n \.\. (_[A-Z0-9_`-]*:)', u'\n - .. \\1', data, flags = re.MULTILINE)
data = re.sub(u'\n - \.\. (_[A-Z0-9_`-]*:)\n -', u' * .. \\1\n\n -', data, flags = re.MULTILINE)
data = re.sub(u'^ - ', u' -', data, flags = re.MULTILINE)
data = re.sub(u'^(\t{1,2}) ', u'\\1', data, flags = re.MULTILINE)
return data
def process_file(fname, data):
buf = io.StringIO(data)
output = ''
in_table = False
table_separator = 0
for line in buf.readlines():
if line.find('.. flat-table::') != -1:
in_table = True
table = ''
elif in_table and not re.match('^[\t\n]|( )', line):
in_table = False
output += process_table(fname, table)
if in_table:
table += line
else:
output += line
if in_table:
in_table = False
output += process_table(fname, table)
return output
fname = sys.argv[1]
data = file(fname, 'rb').read().decode('utf-8')
data = process_file(fname, data)
file(fname, 'wb').write(data.encode('utf-8'))
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
2016-09-05 14:44:34 +03:00
|
|
|
* - 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:
|
|
|
|
|
- Cb\ :sub:`00`
|
|
|
|
|
- Cr\ :sub:`00`
|
|
|
|
|
- Cb\ :sub:`01`
|
|
|
|
|
- Cr\ :sub:`01`
|
|
|
|
|
- Cb\ :sub:`02`
|
|
|
|
|
- Cr\ :sub:`02`
|
|
|
|
|
- Cb\ :sub:`03`
|
|
|
|
|
- Cr\ :sub:`03`
|
|
|
|
|
* - start + 24:
|
|
|
|
|
- Cb\ :sub:`10`
|
|
|
|
|
- Cr\ :sub:`10`
|
|
|
|
|
- Cb\ :sub:`11`
|
|
|
|
|
- Cr\ :sub:`11`
|
|
|
|
|
- Cb\ :sub:`12`
|
|
|
|
|
- Cr\ :sub:`12`
|
|
|
|
|
- Cb\ :sub:`13`
|
|
|
|
|
- Cr\ :sub:`13`
|
|
|
|
|
* - start + 32:
|
|
|
|
|
- Cb\ :sub:`20`
|
|
|
|
|
- Cr\ :sub:`20`
|
|
|
|
|
- Cb\ :sub:`21`
|
|
|
|
|
- Cr\ :sub:`21`
|
|
|
|
|
- Cb\ :sub:`22`
|
|
|
|
|
- Cr\ :sub:`22`
|
|
|
|
|
- Cb\ :sub:`23`
|
|
|
|
|
- Cr\ :sub:`23`
|
|
|
|
|
* - start + 40:
|
|
|
|
|
- Cb\ :sub:`30`
|
|
|
|
|
- Cr\ :sub:`30`
|
|
|
|
|
- Cb\ :sub:`31`
|
|
|
|
|
- Cr\ :sub:`31`
|
|
|
|
|
- Cb\ :sub:`32`
|
|
|
|
|
- Cr\ :sub:`32`
|
|
|
|
|
- Cb\ :sub:`33`
|
|
|
|
|
- Cr\ :sub:`33`
|
