mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-29 07:34:06 +08:00
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>
127 lines
3.0 KiB
ReStructuredText
127 lines
3.0 KiB
ReStructuredText
.. -*- coding: utf-8; mode: rst -*-
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.. _VIDIOC_G_JPEGCOMP:
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******************************************
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ioctl VIDIOC_G_JPEGCOMP, VIDIOC_S_JPEGCOMP
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******************************************
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Name
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====
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VIDIOC_G_JPEGCOMP - VIDIOC_S_JPEGCOMP
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Synopsis
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========
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.. c:function:: int ioctl( int fd, VIDIOC_G_JPEGCOMP, v4l2_jpegcompression *argp )
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:name: VIDIOC_G_JPEGCOMP
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.. c:function:: int ioctl( int fd, VIDIOC_S_JPEGCOMP, const v4l2_jpegcompression *argp )
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:name: VIDIOC_S_JPEGCOMP
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Arguments
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=========
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``fd``
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File descriptor returned by :ref:`open() <func-open>`.
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``argp``
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Description
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===========
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These ioctls are **deprecated**. New drivers and applications should use
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:ref:`JPEG class controls <jpeg-controls>` for image quality and JPEG
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markers control.
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[to do]
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Ronald Bultje elaborates:
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APP is some application-specific information. The application can set it
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itself, and it'll be stored in the JPEG-encoded fields (eg; interlacing
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information for in an AVI or so). COM is the same, but it's comments,
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like 'encoded by me' or so.
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jpeg_markers describes whether the huffman tables, quantization tables
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and the restart interval information (all JPEG-specific stuff) should be
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stored in the JPEG-encoded fields. These define how the JPEG field is
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encoded. If you omit them, applications assume you've used standard
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encoding. You usually do want to add them.
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.. tabularcolumns:: |p{1.2cm}|p{3.0cm}|p{13.3cm}|
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.. c:type:: v4l2_jpegcompression
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.. flat-table:: struct v4l2_jpegcompression
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:header-rows: 0
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:stub-columns: 0
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:widths: 1 1 2
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* - int
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- ``quality``
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- Deprecated. If
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:ref:`V4L2_CID_JPEG_COMPRESSION_QUALITY <jpeg-quality-control>`
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control is exposed by a driver applications should use it instead
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and ignore this field.
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* - int
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- ``APPn``
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-
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* - int
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- ``APP_len``
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-
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* - char
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- ``APP_data``\ [60]
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-
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* - int
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- ``COM_len``
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-
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* - char
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- ``COM_data``\ [60]
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-
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* - __u32
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- ``jpeg_markers``
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- See :ref:`jpeg-markers`. Deprecated. If
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:ref:`V4L2_CID_JPEG_ACTIVE_MARKER <jpeg-active-marker-control>`
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control is exposed by a driver applications should use it instead
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and ignore this field.
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.. tabularcolumns:: |p{6.6cm}|p{2.2cm}|p{8.7cm}|
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.. _jpeg-markers:
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.. flat-table:: JPEG Markers Flags
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:header-rows: 0
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:stub-columns: 0
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:widths: 3 1 4
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* - ``V4L2_JPEG_MARKER_DHT``
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- (1<<3)
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- Define Huffman Tables
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* - ``V4L2_JPEG_MARKER_DQT``
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- (1<<4)
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- Define Quantization Tables
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* - ``V4L2_JPEG_MARKER_DRI``
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- (1<<5)
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- Define Restart Interval
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* - ``V4L2_JPEG_MARKER_COM``
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- (1<<6)
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- Comment segment
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* - ``V4L2_JPEG_MARKER_APP``
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- (1<<7)
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- App segment, driver will always use APP0
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Return Value
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============
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On success 0 is returned, on error -1 and the ``errno`` variable is set
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appropriately. The generic error codes are described at the
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:ref:`Generic Error Codes <gen-errors>` chapter.
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