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docs: document environment variables

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https://bugzilla.gnome.org/show_bug.cgi?id=773544
This commit is contained in:
Víctor Manuel Jáquez Leal 2016-10-27 12:53:54 +02:00
parent 74a9f76d32
commit 2e1f69898b
3 changed files with 74 additions and 1 deletions
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2
docs/plugins/Makefile.am
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@ -61,7 +61,7 @@ EXAMPLE_CFILES =
HTML_IMAGES =
# Extra SGML files that are included by $(DOC_MAIN_SGML_FILE).
content_files =
content_files = running.xml
# Other files to distribute.
extra_files =

5
docs/plugins/gstreamer-vaapi-plugins-docs.xml.in
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@ -9,6 +9,11 @@
<title>GStreamer VA-API Plugins @GST_API_VERSION@ Plugins Reference Manual</title>
</bookinfo>
<chapter>
<title>gstremaer-vaapi Overview</title>
<xi:include href="running.xml"/>
</chapter>
<chapter>
<title>gstreamer-vaapi Elements</title>
<xi:include href="xml/element-vaapijpegdec.xml"/>

68
docs/plugins/running.xml Normal file
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@ -0,0 +1,68 @@
<?xml version="1.0"?>
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.3//EN"
"http://www.oasis-open.org/docbook/xml/4.3/docbookx.dtd" [
<!ENTITY % version-entities SYSTEM "version.entities">
%version-entities;
<!ENTITY % local.common.attrib "xmlns:xi CDATA #FIXED 'http://www.w3.org/2003/XInclude'">
]>
<refentry id="gstreamer-vaapi-running">
<refmeta>
<refentrytitle>Running GStreamer VAAPI Applications</refentrytitle>
</refmeta>
<refnamediv>
<refname>Running GStreamer VAAPI Applications</refname>
<refpurpose>
How to run GStreamer application with VAAPI elements.
</refpurpose>
</refnamediv>
<refsect1>
<title>Running GStreamer VAAPI Applications</title>
<refsect2>
<title>Environment variables</title>
<para>
GStreamer-VAAPI inspects a few of environment variables to define it usage.
</para>
<formalpara id="GST_VAAPI_ALL_DRIVERS">
<title><envar>GST_VAAPI_ALL_DRIVERS</envar></title>
<para>
This environment variable can be set, independently of its value, to disable
the drivers white list. By default only intel and mesa va drivers are loaded
if they are available. The rest are ignored. With this environment variable
defined, all the available va drivers are loaded, even if they are deprecated.
</para>
</formalpara>
<formalpara id="LIBVA_DRIVER_NAME">
<title><envar>LIBVA_DRIVER_NAME</envar></title>
<para>
This environment variable can be set with the drivers name to load. For
example, intel's driver is <userinput>i915</userinput>, meanwhile mesa is
<userinput>gallium</userinput>.
</para>
</formalpara>
<formalpara id="LIBVA_DRIVERS_PATH">
<title><envar>LIBVA_DRIVERS_PATH</envar></title>
<para>
This environment variable can be set to a colon-separated list of paths (or a
semicolon-separated list on Windows). libva will scan these paths for va
drivers.
</para>
</formalpara>
</refsect2>
</refsect1>
</refentry>