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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<th width="100%" align="center">GStreamer Base Plugins 1.0 Library Reference Manual</th>
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<a href="#gst-plugins-base-libs-gstvideofilter.synopsis" class="shortcut">Top</a>
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<a href="#gst-plugins-base-libs-gstvideofilter.description" class="shortcut">Description</a>
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<a href="#gst-plugins-base-libs-gstvideofilter.object-hierarchy" class="shortcut">Object Hierarchy</a>
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<div class="refentry">
<a name="gst-plugins-base-libs-gstvideofilter"></a><div class="titlepage"></div>
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<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideofilter.top_of_page"></a>gstvideofilter</span></h2>
<p>gstvideofilter — Base class for video filters</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstvideofilter.synopsis"></a><h2>Synopsis</h2>
<a name="GstVideoFilter"></a><pre class="synopsis">
#include <gst/video/gstvideofilter.h>
struct <a class="link" href="gst-plugins-base-libs-gstvideofilter.html#GstVideoFilter-struct" title="struct GstVideoFilter">GstVideoFilter</a>;
struct <a class="link" href="gst-plugins-base-libs-gstvideofilter.html#GstVideoFilterClass" title="struct GstVideoFilterClass">GstVideoFilterClass</a>;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideofilter.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 href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstObject.html">GstObject</a>
+----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstElement.html">GstElement</a>
+----<a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseTransform.html">GstBaseTransform</a>
+----GstVideoFilter
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideofilter.description"></a><h2>Description</h2>
<p>
</p>
<div class="refsect2">
<a name="id-1.2.14.6.5.2.1"></a><p>
Provides useful functions and a base class for video filters.
</p>
<p>
The videofilter will by default enable QoS on the parent GstBaseTransform
to implement frame dropping.
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideofilter.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstVideoFilter-struct"></a><h3>struct GstVideoFilter</h3>
<pre class="programlisting">struct GstVideoFilter;</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoFilterClass"></a><h3>struct GstVideoFilterClass</h3>
<pre class="programlisting">struct GstVideoFilterClass {
GstBaseTransformClass parent_class;
gboolean (*set_info) (GstVideoFilter *filter,
GstCaps *incaps, GstVideoInfo *in_info,
GstCaps *outcaps, GstVideoInfo *out_info);
/* transform */
GstFlowReturn (*transform_frame) (GstVideoFilter *filter,
GstVideoFrame *inframe, GstVideoFrame *outframe);
GstFlowReturn (*transform_frame_ip) (GstVideoFilter *trans, GstVideoFrame *frame);
};
</pre>
<p>
The video filter class structure.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<td><p><span class="term"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer-libs/html/GstBaseTransform.html#GstBaseTransformClass"><span class="type">GstBaseTransformClass</span></a> <em class="structfield"><code><a name="GstVideoFilterClass.parent-class"></a>parent_class</code></em>;</span></p></td>
<td>the parent class structure</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstVideoFilterClass.set-info"></a>set_info</code></em> ()</span></p></td>
<td>function to be called with the negotiated caps and video infos</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstVideoFilterClass.transform-frame"></a>transform_frame</code></em> ()</span></p></td>
<td>transform a video frame</td>
</tr>
<tr>
<td><p><span class="term"><em class="structfield"><code><a name="GstVideoFilterClass.transform-frame-ip"></a>transform_frame_ip</code></em> ()</span></p></td>
<td>transform a video frame in place</td>
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