linux_old1/Documentation/media/uapi/v4l/v4l2-selection-flags.rst

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.. -*- coding: utf-8; mode: rst -*-
.. _v4l2-selection-flags:
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Selection flags
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.. tabularcolumns:: |p{5.2cm}|p{2.0cm}|p{6.5cm}|p{1.2cm}|p{1.6cm}|
.. _v4l2-selection-flags-table:
.. flat-table:: Selection flag definitions
:header-rows: 1
: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 19:44:34 +08:00
* - Flag name
- id
- Definition
- Valid for V4L2
- Valid for V4L2 subdev
* - ``V4L2_SEL_FLAG_GE``
- (1 << 0)
- Suggest the driver it should choose greater or equal rectangle (in
size) than was requested. Albeit the driver may choose a lesser
size, it will only do so due to hardware limitations. Without this
flag (and ``V4L2_SEL_FLAG_LE``) the behaviour is to choose the
closest possible rectangle.
- Yes
- Yes
* - ``V4L2_SEL_FLAG_LE``
- (1 << 1)
- Suggest the driver it should choose lesser or equal rectangle (in
size) than was requested. Albeit the driver may choose a greater
size, it will only do so due to hardware limitations.
- Yes
- Yes
* - ``V4L2_SEL_FLAG_KEEP_CONFIG``
- (1 << 2)
- The configuration must not be propagated to any further processing
steps. If this flag is not given, the configuration is propagated
inside the subdevice to all further processing steps.
- No
- Yes