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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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258 lines
5.1 KiB
Text
258 lines
5.1 KiB
Text
<!-- ##### SECTION Title ##### -->
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GstPlugin
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<!-- ##### SECTION Short_Description ##### -->
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Dynamically loadable Elements
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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GStreamer is extensible so <classname>GstElements</classname> can be loaded at runtime. A plugin
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system can provide one or more of the basic <application>GStreamer</application>
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#GstPluginFeature subclasses.
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</para>
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<para>
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A plugin should export a symbol plugin_desc that is a struct of type #GstPluginDesc.
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the plugin loader will check the version of the core library the plugin was linked against
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and will create a new #GstPlugin. It will then call the #GstPluginInitFunc function
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that was provided in the plugin_desc.
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</para>
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<para>
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Once you have a handle to a #GstPlugin, you can add any object that subclasses #GstPluginFeature.
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</para>
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<para>
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use gst_plugin_find_feature() and gst_plugin_get_feature_list() to find features in a plugin.
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</para>
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<para>
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Usually plugins are always automaticlly loaded so you don't need to call gst_plugin_load() explicitly
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to bring it into memory. There are options to statically link plugins to an app or even
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use GStreamer without a plugin repository in which case gst_plugin_load() can be needed
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to bring the plugin into memory.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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#GstPluginFeature, #GstType, #GstAutoplug, #GstElementFactory
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</para>
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<!-- ##### MACRO GST_PLUGIN_ERROR ##### -->
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<para>
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The error quark
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</para>
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<!-- ##### FUNCTION gst_plugin_error_quark ##### -->
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<para>
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Get the error quark
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</para>
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@Returns: The error quark used in GError messages
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<!-- ##### ENUM GstPluginError ##### -->
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<para>
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The plugin loading errors
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</para>
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@GST_PLUGIN_ERROR_MODULE: The plugin could not be loaded
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@GST_PLUGIN_ERROR_DEPENDENCIES: The plugin has unresolved dependencies
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<!-- ##### STRUCT GstPlugin ##### -->
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<para>
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The plugin object
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</para>
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@name:
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@longname:
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@filename:
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@features:
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@numfeatures:
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@manager:
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@module:
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@init_called:
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<!-- ##### USER_FUNCTION GstPluginInitFunc ##### -->
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<para>
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A plugin should provide a pointer to a function of this type in the plugin_desc struct.
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It will be called by the loader at statup.
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</para>
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@module: The <classname>GModule</classname> it was loaded from
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@plugin: The plugin object that can be used to register stuff for this plugin.
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@Returns: A boolean indicating success or failure.
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<!-- ##### STRUCT GstPluginDesc ##### -->
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<para>
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A plugins should export a variable of this type called plugin_desc. This plugin
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loaded will use this variable to initialize the plugin.
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</para>
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@major_version: The minor version of the gstreamer library this plugin was created with
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@minor_version: The minor version of the gstreamer library this plugin was created with
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@name: The name of the plugin
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@plugin_init: The init function of this plugin.
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<!-- ##### MACRO GST_PLUGIN_DESC ##### -->
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<para>
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A handy macro to define a plugin description. This macro handles with all the issues
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involved with the different linking methods for this plugin.
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</para>
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@major: The major version of GStreamer this plugin was compiled against.
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@minor: The minor version of GStreamer this plugin was compiled against.
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@name: The name of the plugin.
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@init: The init function of this plugin.
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<!-- ##### MACRO GST_PLUGIN_DESC_DYNAMIC ##### -->
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<para>
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The macro used to define dynamically loaded plugins.
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</para>
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@major: The major version of GStreamer this plugin was compiled against.
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@minor: The minor version of GStreamer this plugin was compiled against.
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@name: The name of the plugin.
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@init: The init function of this plugin.
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<!-- ##### MACRO GST_PLUGIN_DESC_STATIC ##### -->
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<para>
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A macro used to define a statically linked plugin.
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</para>
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@major: The major version of GStreamer this plugin was compiled against.
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@minor: The minor version of GStreamer this plugin was compiled against.
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@name: The name of the plugin.
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@init: The init function of this plugin.
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<!-- ##### FUNCTION gst_plugin_new ##### -->
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<para>
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</para>
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@filename:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_set_name ##### -->
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<para>
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</para>
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@plugin:
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@name:
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<!-- ##### FUNCTION gst_plugin_get_name ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_get_longname ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_set_longname ##### -->
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<para>
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</para>
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@plugin:
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@longname:
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<!-- ##### FUNCTION gst_plugin_get_filename ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_is_loaded ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_get_feature_list ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_find_feature ##### -->
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<para>
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</para>
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@plugin:
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@name:
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@type:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_load_plugin ##### -->
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<para>
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</para>
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@plugin:
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@error:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_unload_plugin ##### -->
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<para>
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</para>
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@plugin:
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@Returns:
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<!-- ##### FUNCTION gst_plugin_add_feature ##### -->
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<para>
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</para>
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@plugin:
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@feature:
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<!-- ##### FUNCTION gst_plugin_load ##### -->
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<para>
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</para>
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@name:
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@Returns:
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<!-- ##### FUNCTION gst_library_load ##### -->
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<para>
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</para>
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@name:
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@Returns:
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