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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#GstPluginFeature.synopsis" class="shortcut">Top</a>
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<a href="#GstPluginFeature.description" class="shortcut">Description</a>
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<a href="#GstPluginFeature.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry">
<a name="GstPluginFeature"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="GstPluginFeature.top_of_page"></a>GstPluginFeature</span></h2>
<p>GstPluginFeature — Base class for contents of a GstPlugin</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="GstPluginFeature.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/gst.h>
<a class="link" href="GstPluginFeature.html#GstPluginFeature-struct" title="GstPluginFeature">GstPluginFeature</a>;
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (<a class="link" href="GstPluginFeature.html#GstPluginFeatureFilter" title="GstPluginFeatureFilter ()">*GstPluginFeatureFilter</a>) (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);
enum <a class="link" href="GstPluginFeature.html#GstRank" title="enum GstRank">GstRank</a>;
<span class="returnvalue">void</span> <a class="link" href="GstPluginFeature.html#gst-plugin-feature-set-rank" title="gst_plugin_feature_set_rank ()">gst_plugin_feature_set_rank</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> rank</code></em>);
#define <a class="link" href="GstPluginFeature.html#gst-plugin-feature-set-name" title="gst_plugin_feature_set_name()">gst_plugin_feature_set_name</a> (feature,
name)
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> <a class="link" href="GstPluginFeature.html#gst-plugin-feature-get-rank" title="gst_plugin_feature_get_rank ()">gst_plugin_feature_get_rank</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);
#define <a class="link" href="GstPluginFeature.html#gst-plugin-feature-get-name" title="gst_plugin_feature_get_name()">gst_plugin_feature_get_name</a> (feature)
<a class="link" href="GstPlugin.html" title="GstPlugin"><span class="returnvalue">GstPlugin</span></a> * <a class="link" href="GstPluginFeature.html#gst-plugin-feature-get-plugin" title="gst_plugin_feature_get_plugin ()">gst_plugin_feature_get_plugin</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);
const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * <a class="link" href="GstPluginFeature.html#gst-plugin-feature-get-plugin-name" title="gst_plugin_feature_get_plugin_name ()">gst_plugin_feature_get_plugin_name</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);
<a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="returnvalue">GstPluginFeature</span></a> * <a class="link" href="GstPluginFeature.html#gst-plugin-feature-load" title="gst_plugin_feature_load ()">gst_plugin_feature_load</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * <a class="link" href="GstPluginFeature.html#gst-plugin-feature-list-copy" title="gst_plugin_feature_list_copy ()">gst_plugin_feature_list_copy</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>);
<span class="returnvalue">void</span> <a class="link" href="GstPluginFeature.html#gst-plugin-feature-list-free" title="gst_plugin_feature_list_free ()">gst_plugin_feature_list_free</a> (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>);
#define <a class="link" href="GstPluginFeature.html#GST-PLUGIN-FEATURE-LIST-DEBUG:CAPS" title="GST_PLUGIN_FEATURE_LIST_DEBUG()">GST_PLUGIN_FEATURE_LIST_DEBUG</a> (list)
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> <a class="link" href="GstPluginFeature.html#gst-plugin-feature-check-version" title="gst_plugin_feature_check_version ()">gst_plugin_feature_check_version</a> (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_major</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_minor</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_micro</code></em>);
<a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> <a class="link" href="GstPluginFeature.html#gst-plugin-feature-rank-compare-func" title="gst_plugin_feature_rank_compare_func ()">gst_plugin_feature_rank_compare_func</a>
(<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> p1</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> p2</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="GstPluginFeature.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GObject">GObject</a>
+----<a href="http://library.gnome.org/devel/gobject/unstable/gobject-The-Base-Object-Type.html#GInitiallyUnowned">GInitiallyUnowned</a>
+----<a class="link" href="GstObject.html" title="GstObject">GstObject</a>
+----GstPluginFeature
+----<a class="link" href="GstElementFactory.html" title="GstElementFactory">GstElementFactory</a>
+----<a class="link" href="GstTypeFindFactory.html" title="GstTypeFindFactory">GstTypeFindFactory</a>
</pre>
</div>
<div class="refsect1">
<a name="GstPluginFeature.description"></a><h2>Description</h2>
<p>
This is a base class for anything that can be added to a <a class="link" href="GstPlugin.html" title="GstPlugin"><span class="type">GstPlugin</span></a>.
</p>
</div>
<div class="refsect1">
<a name="GstPluginFeature.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstPluginFeature-struct"></a><h3>GstPluginFeature</h3>
<pre class="programlisting">typedef struct _GstPluginFeature GstPluginFeature;</pre>
<p>
Opaque <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> structure.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GstPluginFeatureFilter"></a><h3>GstPluginFeatureFilter ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> (*GstPluginFeatureFilter) (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> user_data</code></em>);</pre>
<p>
A function that can be used with e.g. <a class="link" href="GstRegistry.html#gst-registry-feature-filter" title="gst_registry_feature_filter ()"><code class="function">gst_registry_feature_filter()</code></a>
to get a list of pluginfeature that match certain criteria.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>the pluginfeature to check</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>user_data</code></em> :</span></p></td>
<td>the user_data that has been passed on e.g.
<a class="link" href="GstRegistry.html#gst-registry-feature-filter" title="gst_registry_feature_filter ()"><code class="function">gst_registry_feature_filter()</code></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> for a positive match, <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a> otherwise</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstRank"></a><h3>enum GstRank</h3>
<pre class="programlisting">typedef enum {
GST_RANK_NONE = 0,
GST_RANK_MARGINAL = 64,
GST_RANK_SECONDARY = 128,
GST_RANK_PRIMARY = 256
} GstRank;
</pre>
<p>
Element priority ranks. Defines the order in which the autoplugger (or
similar rank-picking mechanisms, such as e.g. <a class="link" href="gstreamer-GstUriHandler.html#gst-element-make-from-uri" title="gst_element_make_from_uri ()"><code class="function">gst_element_make_from_uri()</code></a>)
will choose this element over an alternative one with the same function.
</p>
<p>
These constants serve as a rough guidance for defining the rank of a
<a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a>. Any value is valid, including values bigger than
<em class="parameter"><code>GST_RANK_PRIMARY</code></em>.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><a name="GST-RANK-NONE:CAPS"></a><span class="term"><code class="literal">GST_RANK_NONE</code></span></p></td>
<td>will be chosen last or not at all
</td>
</tr>
<tr>
<td><p><a name="GST-RANK-MARGINAL:CAPS"></a><span class="term"><code class="literal">GST_RANK_MARGINAL</code></span></p></td>
<td>unlikely to be chosen
</td>
</tr>
<tr>
<td><p><a name="GST-RANK-SECONDARY:CAPS"></a><span class="term"><code class="literal">GST_RANK_SECONDARY</code></span></p></td>
<td>likely to be chosen
</td>
</tr>
<tr>
<td><p><a name="GST-RANK-PRIMARY:CAPS"></a><span class="term"><code class="literal">GST_RANK_PRIMARY</code></span></p></td>
<td>will be chosen first
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-set-rank"></a><h3>gst_plugin_feature_set_rank ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_plugin_feature_set_rank (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> rank</code></em>);</pre>
<p>
Specifies a rank for a plugin feature, so that autoplugging uses
the most appropriate feature.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>feature to rank</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>rank</code></em> :</span></p></td>
<td>rank value - higher number means more priority rank</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-set-name"></a><h3>gst_plugin_feature_set_name()</h3>
<pre class="programlisting">#define gst_plugin_feature_set_name(feature,name) gst_object_set_name(GST_OBJECT_CAST(feature),name)
</pre>
<p>
Sets the name of the plugin feature, getting rid of the old name if there was one.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> to set the name of.</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>name</code></em> :</span></p></td>
<td>the new name</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-get-rank"></a><h3>gst_plugin_feature_get_rank ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a> gst_plugin_feature_get_rank (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);</pre>
<p>
Gets the rank of a plugin feature.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a feature</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>The rank of the feature</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-get-name"></a><h3>gst_plugin_feature_get_name()</h3>
<pre class="programlisting">#define gst_plugin_feature_get_name(feature) GST_OBJECT_NAME(feature)
</pre>
<p>
Returns the name of <em class="parameter"><code>feature</code></em>.
For a nameless plugin feature, this returns NULL.
</p>
<div class="variablelist"><table border="0" class="variablelist">
<colgroup>
<col align="left" valign="top">
<col>
</colgroup>
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> to get the name of <em class="parameter"><code>feature</code></em>.</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the name of <em class="parameter"><code>feature</code></em>. MT safe. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-get-plugin"></a><h3>gst_plugin_feature_get_plugin ()</h3>
<pre class="programlisting"><a class="link" href="GstPlugin.html" title="GstPlugin"><span class="returnvalue">GstPlugin</span></a> * gst_plugin_feature_get_plugin (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);</pre>
<p>
Get the plugin that provides this feature.
</p>
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<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a feature</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the plugin that provides this feature, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>.
Unref with <a class="link" href="GstObject.html#gst-object-unref" title="gst_object_unref ()"><code class="function">gst_object_unref()</code></a> when no longer needed. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-get-plugin-name"></a><h3>gst_plugin_feature_get_plugin_name ()</h3>
<pre class="programlisting">const <a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * gst_plugin_feature_get_plugin_name (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);</pre>
<p>
Get the name of the plugin that provides this feature.
</p>
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<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a feature</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the name of the plugin that provides this feature, or <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> if
the feature is not associated with a plugin.</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-load"></a><h3>gst_plugin_feature_load ()</h3>
<pre class="programlisting"><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="returnvalue">GstPluginFeature</span></a> * gst_plugin_feature_load (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>);</pre>
<p>
Loads the plugin containing <em class="parameter"><code>feature</code></em> if it's not already loaded. <em class="parameter"><code>feature</code></em> is
unaffected; use the return value instead.
</p>
<p>
Normally this function is used like this:
</p>
<div class="informalexample">
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<td class="listing_lines" align="right"><pre>1
2
3
4
5
6</pre></td>
<td class="listing_code"><pre class="programlisting">GstPluginFeature <span class="gtkdoc opt">*</span>loaded_feature<span class="gtkdoc opt">;</span>
loaded_feature <span class="gtkdoc opt">=</span> <span class="function"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPluginFeature.html#gst-plugin-feature-load">gst_plugin_feature_load</a></span> <span class="gtkdoc opt">(</span>feature<span class="gtkdoc opt">);</span>
<span class="gtkdoc slc">// presumably, we're no longer interested in the potentially-unloaded feature</span>
<span class="function"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html#gst-object-unref">gst_object_unref</a></span> <span class="gtkdoc opt">(</span>feature<span class="gtkdoc opt">);</span>
feature <span class="gtkdoc opt">=</span> loaded_feature<span class="gtkdoc opt">;</span></pre></td>
</tr>
</tbody>
</table>
</div>
<p>
</p>
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<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>the plugin feature to check. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a reference to the loaded feature, or NULL on error. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-list-copy"></a><h3>gst_plugin_feature_list_copy ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> * gst_plugin_feature_list_copy (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>);</pre>
<p>
Copies the list of features. Caller should call <em class="parameter"><code>gst_plugin_feature_list_free</code></em>
when done with the list.
</p>
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<td><p><span class="term"><em class="parameter"><code>list</code></em> :</span></p></td>
<td>list
of <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a>. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gst.PluginFeature]</span>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a copy of <em class="parameter"><code>list</code></em>,
with each feature's reference count incremented. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gst.PluginFeature]</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-list-free"></a><h3>gst_plugin_feature_list_free ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> gst_plugin_feature_list_free (<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> *list</code></em>);</pre>
<p>
Unrefs each member of <em class="parameter"><code>list</code></em>, then frees the list.
</p>
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<td><p><span class="term"><em class="parameter"><code>list</code></em> :</span></p></td>
<td>list
of <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gst.PluginFeature]</span>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-PLUGIN-FEATURE-LIST-DEBUG:CAPS"></a><h3>GST_PLUGIN_FEATURE_LIST_DEBUG()</h3>
<pre class="programlisting">#define GST_PLUGIN_FEATURE_LIST_DEBUG(list) gst_plugin_feature_list_debug(list)
</pre>
<p>
Debug the plugin feature names in <em class="parameter"><code>list</code></em>.
</p>
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<td><p><span class="term"><em class="parameter"><code>list</code></em> :</span></p></td>
<td>a <a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> of
plugin features. <span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> Gst.PluginFeature]</span>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-check-version"></a><h3>gst_plugin_feature_check_version ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> gst_plugin_feature_check_version (<em class="parameter"><code><a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> *feature</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_major</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_minor</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> min_micro</code></em>);</pre>
<p>
Checks whether the given plugin feature is at least
the required version
</p>
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<td><p><span class="term"><em class="parameter"><code>feature</code></em> :</span></p></td>
<td>a feature</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>min_major</code></em> :</span></p></td>
<td>minimum required major version</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>min_minor</code></em> :</span></p></td>
<td>minimum required minor version</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>min_micro</code></em> :</span></p></td>
<td>minimum required micro version</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if the plugin feature has at least
the required version, otherwise <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>.</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="gst-plugin-feature-rank-compare-func"></a><h3>gst_plugin_feature_rank_compare_func ()</h3>
<pre class="programlisting"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gint"><span class="returnvalue">gint</span></a> gst_plugin_feature_rank_compare_func
(<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> p1</code></em>,
<em class="parameter"><code><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#gconstpointer"><span class="type">gconstpointer</span></a> p2</code></em>);</pre>
<p>
Compares the two given <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a> instances. This function can be
used as a <a href="http://library.gnome.org/devel/glib/unstable/glib-Doubly-Linked-Lists.html#GCompareFunc"><span class="type">GCompareFunc</span></a> when sorting by rank and then by name.
</p>
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<td><p><span class="term"><em class="parameter"><code>p1</code></em> :</span></p></td>
<td>a <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>p2</code></em> :</span></p></td>
<td>a <a class="link" href="GstPluginFeature.html" title="GstPluginFeature"><span class="type">GstPluginFeature</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>negative value if the rank of p1 > the rank of p2 or the ranks are
equal but the name of p1 comes before the name of p2; zero if the rank
and names are equal; positive value if the rank of p1 < the rank of p2 or the
ranks are equal but the name of p2 comes before the name of p1</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="GstPluginFeature.see-also"></a><h2>See Also</h2>
<a class="link" href="GstPlugin.html" title="GstPlugin"><span class="type">GstPlugin</span></a>
</div>
</div>
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