2016-06-30 16:18:56 +03:00
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.. -*- coding: utf-8; mode: rst -*-
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.. _pixfmt-indexed:
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**************
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Indexed Format
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**************
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In this format each pixel is represented by an 8 bit index into a 256
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entry ARGB palette. It is intended for
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:ref:`Video Output Overlays <osd>` only. There are no ioctls to access
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the palette, this must be done with ioctls of the Linux framebuffer API.
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.. flat-table:: Indexed Image Format
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:header-rows: 2
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:stub-columns: 0
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[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
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* - Identifier
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- Code
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-
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- :cspan:`7` Byte 0
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* -
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-
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- Bit
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- 7
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- 6
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- 5
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- 4
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- 3
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- 2
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- 1
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- 0
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* .. _V4L2-PIX-FMT-PAL8:
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- ``V4L2_PIX_FMT_PAL8``
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- 'PAL8'
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-
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- i\ :sub:`7`
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- i\ :sub:`6`
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- i\ :sub:`5`
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- i\ :sub:`4`
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- i\ :sub:`3`
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- i\ :sub:`2`
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- i\ :sub:`1`
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- i\ :sub:`0`
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