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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>
154 lines
2.7 KiB
ReStructuredText
154 lines
2.7 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _V4L2-PIX-FMT-NV16:
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.. _V4L2-PIX-FMT-NV61:
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******************************************************
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V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')
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******************************************************
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V4L2_PIX_FMT_NV61
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Formats with ½ horizontal chroma resolution, also known as YUV 4:2:2.
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One luminance and one chrominance plane with alternating chroma samples
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as opposed to ``V4L2_PIX_FMT_YVU420``
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Description
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===========
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These are two-plane versions of the YUV 4:2:2 format. The three
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components are separated into two sub-images or planes. The Y plane is
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first. The Y plane has one byte per pixel. For ``V4L2_PIX_FMT_NV16``, a
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combined CbCr plane immediately follows the Y plane in memory. The CbCr
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plane is the same width and height, in bytes, as the Y plane (and of the
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image). Each CbCr pair belongs to two pixels. For example,
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Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`.
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``V4L2_PIX_FMT_NV61`` is the same except the Cb and Cr bytes are
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swapped, the CrCb plane starts with a Cr byte.
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If the Y plane has pad bytes after each row, then the CbCr plane has as
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many pad bytes after its rows.
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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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- Cr\ :sub:`00`
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- Cb\ :sub:`01`
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- Cr\ :sub:`01`
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* - start + 20:
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- Cb\ :sub:`10`
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- Cr\ :sub:`10`
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- Cb\ :sub:`11`
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- Cr\ :sub:`11`
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* - start + 24:
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- Cb\ :sub:`20`
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- Cr\ :sub:`20`
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- Cb\ :sub:`21`
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- Cr\ :sub:`21`
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* - start + 28:
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- Cb\ :sub:`30`
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- Cr\ :sub:`30`
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- Cb\ :sub:`31`
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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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-
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- Y
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- Y
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-
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- Y
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* -
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-
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- C
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-
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-
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- C
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-
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* - 1
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- Y
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-
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- Y
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- Y
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-
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- Y
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* -
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-
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- C
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-
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-
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- C
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-
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* -
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* - 2
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- Y
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-
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- Y
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- Y
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-
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- Y
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* -
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-
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- C
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-
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-
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- C
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-
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* - 3
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- Y
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-
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- Y
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- Y
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-
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- Y
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* -
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-
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- C
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-
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-
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- C
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-
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