aboutsummaryrefslogtreecommitdiffstats
path: root/functest/core/feature.py
AgeCommit message (Expand)AuthorFilesLines
2018-02-09Unlink feature from constantsCédric Ollivier1-3/+2
2017-12-27Execute feature command by subprocess directlyLinda Wang1-4/+7
2017-12-20Remove logger_test_resultsCédric Ollivier1-3/+0
2017-06-21Define logger as Feature instance attributeJose Lausuch1-0/+18
2017-05-23Add docstrings in unitCédric Ollivier1-1/+1
2017-05-16Switch from generate_report to PrettyTableCédric Ollivier1-1/+0
2017-05-05Replace project_name by case_name in result file nameCédric Ollivier1-1/+1
2017-05-04Define loggers as class-private membersCédric Ollivier1-6/+8
2017-05-04Delete functest.utils.functest_loggerCédric Ollivier1-2/+3
2017-04-26Manage criteria in TestCaseCédric Ollivier1-2/+2
2017-04-26Switch TestCase attribute criteria to resultCédric Ollivier1-5/+5
2017-04-21Switch testcase to test case in docstringsCédric Ollivier1-1/+1
2017-04-20Minor changes in docstringsCédric Ollivier1-5/+7
2017-04-18Add docstings in feature.pyCédric Ollivier1-0/+52
2017-04-18Remove former cmd instance attributeCédric Ollivier1-1/+0
2017-04-14Add license in feature.pySerenaFeng1-0/+7
2017-04-14Remove deprecated feature modulesCédric Ollivier1-3/+13
2017-04-12Refactor the Feature frameworkCédric Ollivier1-42/+24
2017-04-11Modify TestCase constructor attributesCédric Ollivier1-5/+5
2017-04-04Add case_name as constructor argCédric Ollivier1-3/+2
2017-03-28rename FeatureBase to FeatureSerenaFeng1-2/+2
2017-03-28rename feature_base to featureSerenaFeng1-0/+63
"></refentrytitle> &manvol; </refmeta> <refnamediv> <refname>VIDIOC_SUBDEV_G_FMT</refname> <refname>VIDIOC_SUBDEV_S_FMT</refname> <refpurpose>Get or set the data format on a subdev pad</refpurpose> </refnamediv> <refsynopsisdiv> <funcsynopsis> <funcprototype> <funcdef>int <function>ioctl</function></funcdef> <paramdef>int <parameter>fd</parameter></paramdef> <paramdef>int <parameter>request</parameter></paramdef> <paramdef>struct v4l2_subdev_format *<parameter>argp</parameter> </paramdef> </funcprototype> </funcsynopsis> </refsynopsisdiv> <refsect1> <title>Arguments</title> <variablelist> <varlistentry> <term><parameter>fd</parameter></term> <listitem> <para>&fd;</para> </listitem> </varlistentry> <varlistentry> <term><parameter>request</parameter></term> <listitem> <para>VIDIOC_SUBDEV_G_FMT, VIDIOC_SUBDEV_S_FMT</para> </listitem> </varlistentry> <varlistentry> <term><parameter>argp</parameter></term> <listitem> <para></para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1> <title>Description</title> <note> <title>Experimental</title> <para>This is an <link linkend="experimental">experimental</link> interface and may change in the future.</para> </note> <para>These ioctls are used to negotiate the frame format at specific subdev pads in the image pipeline.</para> <para>To retrieve the current format applications set the <structfield>pad</structfield> field of a &v4l2-subdev-format; to the desired pad number as reported by the media API and the <structfield>which</structfield> field to <constant>V4L2_SUBDEV_FORMAT_ACTIVE</constant>. When they call the <constant>VIDIOC_SUBDEV_G_FMT</constant> ioctl with a pointer to this structure the driver fills the members of the <structfield>format</structfield> field.</para> <para>To change the current format applications set both the <structfield>pad</structfield> and <structfield>which</structfield> fields and all members of the <structfield>format</structfield> field. When they call the <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl with a pointer to this structure the driver verifies the requested format, adjusts it based on the hardware capabilities and configures the device. Upon return the &v4l2-subdev-format; contains the current format as would be returned by a <constant>VIDIOC_SUBDEV_G_FMT</constant> call.</para> <para>Applications can query the device capabilities by setting the <structfield>which</structfield> to <constant>V4L2_SUBDEV_FORMAT_TRY</constant>. When set, 'try' formats are not applied to the device by the driver, but are changed exactly as active formats and stored in the sub-device file handle. Two applications querying the same sub-device would thus not interact with each other.</para> <para>For instance, to try a format at the output pad of a sub-device, applications would first set the try format at the sub-device input with the <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl. They would then either retrieve the default format at the output pad with the <constant>VIDIOC_SUBDEV_G_FMT</constant> ioctl, or set the desired output pad format with the <constant>VIDIOC_SUBDEV_S_FMT</constant> ioctl and check the returned value.</para> <para>Try formats do not depend on active formats, but can depend on the current links configuration or sub-device controls value. For instance, a low-pass noise filter might crop pixels at the frame boundaries, modifying its output frame size.</para> <para>Drivers must not return an error solely because the requested format doesn't match the device capabilities. They must instead modify the format to match what the hardware can provide. The modified format should be as close as possible to the original request.</para> <table pgwide="1" frame="none" id="v4l2-subdev-format"> <title>struct <structname>v4l2_subdev_format</structname></title> <tgroup cols="3"> &cs-str; <tbody valign="top"> <row> <entry>__u32</entry> <entry><structfield>pad</structfield></entry> <entry>Pad number as reported by the media controller API.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>which</structfield></entry> <entry>Format to modified, from &v4l2-subdev-format-whence;.</entry> </row> <row> <entry>&v4l2-mbus-framefmt;</entry> <entry><structfield>format</structfield></entry> <entry>Definition of an image format, see <xref linkend="v4l2-mbus-framefmt" /> for details.</entry> </row> <row> <entry>__u32</entry> <entry><structfield>reserved</structfield>[8]</entry> <entry>Reserved for future extensions. Applications and drivers must set the array to zero.</entry> </row> </tbody> </tgroup> </table> <table pgwide="1" frame="none" id="v4l2-subdev-format-whence"> <title>enum <structname>v4l2_subdev_format_whence</structname></title> <tgroup cols="3"> &cs-def; <tbody valign="top"> <row> <entry>V4L2_SUBDEV_FORMAT_TRY</entry> <entry>0</entry> <entry>Try formats, used for querying device capabilities.</entry> </row> <row> <entry>V4L2_SUBDEV_FORMAT_ACTIVE</entry> <entry>1</entry> <entry>Active formats, applied to the hardware.</entry> </row> </tbody> </tgroup> </table> </refsect1> <refsect1> &return-value; <variablelist> <varlistentry> <term><errorcode>EBUSY</errorcode></term> <listitem> <para>The format can't be changed because the pad is currently busy. This can be caused, for instance, by an active video stream on the pad. The ioctl must not be retried without performing another action to fix the problem first. Only returned by <constant>VIDIOC_SUBDEV_S_FMT</constant></para> </listitem> </varlistentry> <varlistentry> <term><errorcode>EINVAL</errorcode></term> <listitem> <para>The &v4l2-subdev-format; <structfield>pad</structfield> references a non-existing pad, or the <structfield>which</structfield> field references a non-existing format.</para> </listitem> </varlistentry> </variablelist> </refsect1> <refsect1> &return-value; </refsect1> </refentry>