c2b66cafdf
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>
130 lines
2.4 KiB
ReStructuredText
130 lines
2.4 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _V4L2-PIX-FMT-YUV422P:
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*****************************
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V4L2_PIX_FMT_YUV422P ('422P')
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*****************************
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Format with ½ horizontal chroma resolution, also known as YUV 4:2:2.
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Planar layout as opposed to ``V4L2_PIX_FMT_YUYV``
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Description
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===========
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This format is not commonly used. This is a planar version of the YUYV
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format. The three components are separated into three sub-images or
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planes. The Y plane is first. The Y plane has one byte per pixel. The Cb
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plane immediately follows the Y plane in memory. The Cb plane is half
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the width of the Y plane (and of the image). Each Cb belongs to two
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pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`,
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Y'\ :sub:`01`. Following the Cb plane is the Cr plane, just like the Cb
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plane.
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If the Y plane has pad bytes after each row, then the Cr and Cb planes
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have half as many pad bytes after their rows. In other words, two Cx
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rows (including padding) is exactly as long as one Y row (including
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padding).
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**Byte Order.**
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Each cell is one byte.
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - start + 0:
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- Y'\ :sub:`00`
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- Y'\ :sub:`01`
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- Y'\ :sub:`02`
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- Y'\ :sub:`03`
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* - start + 4:
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- Y'\ :sub:`10`
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- Y'\ :sub:`11`
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- Y'\ :sub:`12`
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- Y'\ :sub:`13`
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* - start + 8:
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- Y'\ :sub:`20`
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- Y'\ :sub:`21`
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- Y'\ :sub:`22`
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- Y'\ :sub:`23`
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* - start + 12:
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- Y'\ :sub:`30`
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- Y'\ :sub:`31`
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- Y'\ :sub:`32`
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- Y'\ :sub:`33`
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* - start + 16:
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- Cb\ :sub:`00`
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- Cb\ :sub:`01`
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* - start + 18:
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- Cb\ :sub:`10`
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- Cb\ :sub:`11`
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* - start + 20:
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- Cb\ :sub:`20`
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- Cb\ :sub:`21`
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* - start + 22:
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- Cb\ :sub:`30`
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- Cb\ :sub:`31`
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* - start + 24:
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- Cr\ :sub:`00`
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- Cr\ :sub:`01`
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* - start + 26:
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- Cr\ :sub:`10`
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- Cr\ :sub:`11`
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* - start + 28:
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- Cr\ :sub:`20`
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- Cr\ :sub:`21`
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* - start + 30:
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- Cr\ :sub:`30`
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- Cr\ :sub:`31`
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**Color Sample Location..**
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* -
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- 0
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-
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- 1
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- 2
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-
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- 3
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* - 0
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- Y
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- C
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- Y
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- Y
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- C
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- Y
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* - 1
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- Y
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- C
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- Y
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- Y
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- C
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- Y
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* - 2
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- Y
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- C
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- Y
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- Y
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- C
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- Y
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* - 3
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- Y
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- C
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- Y
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- Y
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- C
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- Y
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