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authorMauro Carvalho Chehab <mchehab@redhat.com>2011-05-31 23:27:44 +0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-07-28 00:52:05 +0400
commit4266129964b8238526936d723de65b419d8069c6 (patch)
tree38c6b5cd3dc99b8599391ffad3b87e399bef56a2 /Documentation/DocBook/v4l/vidioc-encoder-cmd.xml
parent04893043ae9ea8aa82b712491ed25ba6c4ffbca3 (diff)
downloadlinux-4266129964b8238526936d723de65b419d8069c6.tar.xz
[media] DocBook: Move all media docbook stuff into its own directory
This patch addresses several issues pointed by Randy Dunlap <rdunlap@xenotime.net> at changeset ece722c: - In the generated index.html file, "media" is listed first, but it should be listed in alphabetical order, not first. - The generated files are (hidden) in .tmpmedia/ - The link from the top-level index.html file to "media" is to media/index.html, but the file is actually in .tmpmedia/media/index.html - Please build docs with and without using "O=builddir" and test that. - Would it be possible for media to have its own Makefile instead of merging into this one? Due to the way cleandocs target works, I had to rename the media DocBook to media_api, otherwise cleandocs would remove the /media directory. Thanks-to: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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diff --git a/Documentation/DocBook/v4l/vidioc-encoder-cmd.xml b/Documentation/DocBook/v4l/vidioc-encoder-cmd.xml
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--- a/Documentation/DocBook/v4l/vidioc-encoder-cmd.xml
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@@ -1,204 +0,0 @@
-<refentry id="vidioc-encoder-cmd">
- <refmeta>
- <refentrytitle>ioctl VIDIOC_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD</refentrytitle>
- &manvol;
- </refmeta>
-
- <refnamediv>
- <refname>VIDIOC_ENCODER_CMD</refname>
- <refname>VIDIOC_TRY_ENCODER_CMD</refname>
- <refpurpose>Execute an encoder command</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_encoder_cmd *<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_ENCODER_CMD, VIDIOC_TRY_ENCODER_CMD</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 control an audio/video (usually MPEG-) encoder.
-<constant>VIDIOC_ENCODER_CMD</constant> sends a command to the
-encoder, <constant>VIDIOC_TRY_ENCODER_CMD</constant> can be used to
-try a command without actually executing it.</para>
-
- <para>To send a command applications must initialize all fields of a
- &v4l2-encoder-cmd; and call
- <constant>VIDIOC_ENCODER_CMD</constant> or
- <constant>VIDIOC_TRY_ENCODER_CMD</constant> with a pointer to this
- structure.</para>
-
- <para>The <structfield>cmd</structfield> field must contain the
-command code. The <structfield>flags</structfield> field is currently
-only used by the STOP command and contains one bit: If the
-<constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant> flag is set,
-encoding will continue until the end of the current <wordasword>Group
-Of Pictures</wordasword>, otherwise it will stop immediately.</para>
-
- <para>A <function>read</function>() call sends a START command to
-the encoder if it has not been started yet. After a STOP command,
-<function>read</function>() calls will read the remaining data
-buffered by the driver. When the buffer is empty,
-<function>read</function>() will return zero and the next
-<function>read</function>() call will restart the encoder.</para>
-
- <para>A <function>close</function>() call sends an immediate STOP
-to the encoder, and all buffered data is discarded.</para>
-
- <para>These ioctls are optional, not all drivers may support
-them. They were introduced in Linux 2.6.21.</para>
-
- <table pgwide="1" frame="none" id="v4l2-encoder-cmd">
- <title>struct <structname>v4l2_encoder_cmd</structname></title>
- <tgroup cols="3">
- &cs-str;
- <tbody valign="top">
- <row>
- <entry>__u32</entry>
- <entry><structfield>cmd</structfield></entry>
- <entry>The encoder command, see <xref linkend="encoder-cmds" />.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>flags</structfield></entry>
- <entry>Flags to go with the command, see <xref
- linkend="encoder-flags" />. If no flags are defined for
-this command, drivers and applications must set this field to
-zero.</entry>
- </row>
- <row>
- <entry>__u32</entry>
- <entry><structfield>data</structfield>[8]</entry>
- <entry>Reserved for future extensions. Drivers and
-applications must set the array to zero.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="encoder-cmds">
- <title>Encoder Commands</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_ENC_CMD_START</constant></entry>
- <entry>0</entry>
- <entry>Start the encoder. When the encoder is already
-running or paused, this command does nothing. No flags are defined for
-this command.</entry>
- </row>
- <row>
- <entry><constant>V4L2_ENC_CMD_STOP</constant></entry>
- <entry>1</entry>
- <entry>Stop the encoder. When the
-<constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant> flag is set,
-encoding will continue until the end of the current <wordasword>Group
-Of Pictures</wordasword>, otherwise encoding will stop immediately.
-When the encoder is already stopped, this command does
-nothing.</entry>
- </row>
- <row>
- <entry><constant>V4L2_ENC_CMD_PAUSE</constant></entry>
- <entry>2</entry>
- <entry>Pause the encoder. When the encoder has not been
-started yet, the driver will return an &EPERM;. When the encoder is
-already paused, this command does nothing. No flags are defined for
-this command.</entry>
- </row>
- <row>
- <entry><constant>V4L2_ENC_CMD_RESUME</constant></entry>
- <entry>3</entry>
- <entry>Resume encoding after a PAUSE command. When the
-encoder has not been started yet, the driver will return an &EPERM;.
-When the encoder is already running, this command does nothing. No
-flags are defined for this command.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
-
- <table pgwide="1" frame="none" id="encoder-flags">
- <title>Encoder Command Flags</title>
- <tgroup cols="3">
- &cs-def;
- <tbody valign="top">
- <row>
- <entry><constant>V4L2_ENC_CMD_STOP_AT_GOP_END</constant></entry>
- <entry>0x0001</entry>
- <entry>Stop encoding at the end of the current <wordasword>Group Of
-Pictures</wordasword>, rather than immediately.</entry>
- </row>
- </tbody>
- </tgroup>
- </table>
- </refsect1>
-
- <refsect1>
- &return-value;
-
- <variablelist>
- <varlistentry>
- <term><errorcode>EINVAL</errorcode></term>
- <listitem>
- <para>The driver does not support this ioctl, or the
-<structfield>cmd</structfield> field is invalid.</para>
- </listitem>
- </varlistentry>
- <varlistentry>
- <term><errorcode>EPERM</errorcode></term>
- <listitem>
- <para>The application sent a PAUSE or RESUME command when
-the encoder was not running.</para>
- </listitem>
- </varlistentry>
- </variablelist>
- </refsect1>
-</refentry>
-
-<!--
-Local Variables:
-mode: sgml
-sgml-parent-document: "v4l2.sgml"
-indent-tabs-mode: nil
-End:
--->