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docs: update docs (format and search path).

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Remove obsolete xml registry cache extension. Tell that content and location is
internal detail. Docuemnt the plugin search order.
This commit is contained in:
Stefan Kost 2010-06-09 12:06:52 +03:00
parent 012cf2862f
commit fdbf9239b3
1 changed files with 27 additions and 7 deletions
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34
gst/gstregistry.c
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@ -36,7 +36,7 @@
* but the "default registry" is the only object that has any meaning to the
* core.
*
* The registry.xml file is actually a cache of plugin information. This is
* The registry file is actually a cache of plugin information. This is
* unlike versions prior to 0.10, where the registry file was the primary source
* of plugin information, and was created by the gst-register command.
*
@ -45,13 +45,33 @@
* or wants to search for a feature that satisfies given criteria, the primary
* means of doing so is to load every plugin and look at the resulting
* information that is gathered in the default registry. Clearly, this is a time
* consuming process, so we cache information in the registry.xml file.
* consuming process, so we cache information in the registry file. The format
* and location of the cache file is internal to gstreamer.
*
* On startup, plugins are searched for in the plugin search path. This path can
* be set directly using the GST_PLUGIN_PATH environment variable. The registry
* file is loaded from ~/.gstreamer-$GST_MAJORMINOR/registry-$ARCH.xml or the
* file listed in the GST_REGISTRY env var. The only reason to change the
* registry location is for testing.
* On startup, plugins are searched for in the plugin search path. The following
* locations are checked in this order:
* <itemizedlist>
* <listitem>
* <para>location from --gst-plugin-path commandline option.</para>
* </listitem>
* <listitem>
* <para>the GST_PLUGIN_PATH environment variable.</para>
* </listitem>
* <listitem>
* <para>the GST_PLUGIN_SYSTEM_PATH environment variable.</para>
* </listitem>
* <listitem>
* <para>default locations (if GST_PLUGIN_SYSTEM_PATH is not set). Those
* default locations are:
* <filename>~/.gstreamer-$GST_MAJORMINOR/plugins/</filename>
* and <filename>$prefix/libs/gstreamer-$GST_MAJORMINOR/</filename>.
* </para>
* </listitem>
* </itemizedlist>
* The registry cache file is loaded from
* <filename>~/.gstreamer-$GST_MAJORMINOR/registry-$ARCH.bin</filename> or the
* file listed in the GST_REGISTRY env var. One reason to change the registry
* location is for testing.
*
* For each plugin that is found in the plugin search path, there could be 3
* possibilities for cached information: