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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>gstvideosink</title>
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<tr><td colspan="5" class="shortcuts">
<a href="#gst-plugins-base-libs-gstvideosink.synopsis" class="shortcut">Top</a>
                   | 
                  <a href="#gst-plugins-base-libs-gstvideosink.description" class="shortcut">Description</a>
                   | 
                  <a href="#gst-plugins-base-libs-gstvideosink.object-hierarchy" class="shortcut">Object Hierarchy</a>
                   | 
                  <a href="#gst-plugins-base-libs-gstvideosink.properties" class="shortcut">Properties</a>
</td></tr>
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<div class="refentry">
<a name="gst-plugins-base-libs-gstvideosink"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-base-libs-gstvideosink.top_of_page"></a>gstvideosink</span></h2>
<p>gstvideosink — Base class for video sinks</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-base-libs-gstvideosink.synopsis"></a><h2>Synopsis</h2>
<a name="GstVideoSink"></a><pre class="synopsis">
#include &lt;gst/video/gstvideosink.h&gt;

struct              <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink-struct" title="struct GstVideoSink">GstVideoSink</a>;
struct              <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSinkClass" title="struct GstVideoSinkClass">GstVideoSinkClass</a>;
struct              <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle">GstVideoRectangle</a>;
#define             <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-HEIGHT:CAPS" title="GST_VIDEO_SINK_HEIGHT()">GST_VIDEO_SINK_HEIGHT</a>               (obj)
#define             <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-PAD:CAPS" title="GST_VIDEO_SINK_PAD()">GST_VIDEO_SINK_PAD</a>                  (obj)
#define             <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GST-VIDEO-SINK-WIDTH:CAPS" title="GST_VIDEO_SINK_WIDTH()">GST_VIDEO_SINK_WIDTH</a>                (obj)
<span class="returnvalue">void</span>                <a class="link" href="gst-plugins-base-libs-gstvideosink.html#gst-video-sink-center-rect" title="gst_video_sink_center_rect ()">gst_video_sink_center_rect</a>          (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> src</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> dst</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> *result</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> scaling</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideosink.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="synopsis">
  <a href="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a>
   +----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstObject.html">GstObject</a>
         +----<a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstElement.html">GstElement</a>
               +----<a href="/usr/share/gtk-doc/html/gstreamer-libs-0.10/GstBaseSink.html">GstBaseSink</a>
                     +----GstVideoSink
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideosink.properties"></a><h2>Properties</h2>
<pre class="synopsis">
  "<a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink--show-preroll-frame" title='The "show-preroll-frame" property'>show-preroll-frame</a>"       <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideosink.description"></a><h2>Description</h2>
<p>
</p>
<div class="refsect2">
<a name="idp29609152"></a><p>
Provides useful functions and a base class for video sinks. 
</p>
<p>
GstVideoSink will configure the default base sink to drop frames that
arrive later than 20ms as this is considered the default threshold for
observing out-of-sync frames.
</p>
</div>
<p>
</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideosink.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GstVideoSink-struct"></a><h3>struct GstVideoSink</h3>
<pre class="programlisting">struct GstVideoSink {
  gint width, height;
};
</pre>
<p>
The video sink instance structure. Derived video sinks should set the
<em class="parameter"><code>height</code></em> and <em class="parameter"><code>width</code></em> members.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoSink-struct.width"></a>width</code></em>;</span></p></td>
<td>video width (derived class needs to set this)</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoSink-struct.height"></a>height</code></em>;</span></p></td>
<td>video height (derived class needs to set this)</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoSinkClass"></a><h3>struct GstVideoSinkClass</h3>
<pre class="programlisting">struct GstVideoSinkClass {
  GstBaseSinkClass parent_class;

  GstFlowReturn  (*show_frame) (GstVideoSink *video_sink, GstBuffer *buf);
};
</pre>
<p>
The video sink class structure. Derived classes should override the
<em class="parameter"><code>show_frame</code></em> virtual function.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/gstreamer-libs-0.10/GstBaseSink.html#GstBaseSinkClass"><span class="type">GstBaseSinkClass</span></a> <em class="structfield"><code><a name="GstVideoSinkClass.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="GstVideoSinkClass.show-frame"></a>show_frame</code></em> ()</span></p></td>
<td>render a video frame. Maps to <code class="function">GstBaseSinkClass.render()</code> and
<code class="function">GstBaseSinkClass.preroll()</code> vfuncs. Rendering during preroll will be
suppressed if the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink--show-preroll-frame" title='The "show-preroll-frame" property'><span class="type">"show-preroll-frame"</span></a> property is set to
<a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>. Since: 0.10.25</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoRectangle"></a><h3>struct GstVideoRectangle</h3>
<pre class="programlisting">struct GstVideoRectangle {
  gint x;
  gint y;
  gint w;
  gint h;
};
</pre>
<p>
Helper structure representing a rectangular area.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.x"></a>x</code></em>;</span></p></td>
<td>X coordinate of rectangle's top-left point</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.y"></a>y</code></em>;</span></p></td>
<td>Y coordinate of rectangle's top-left point</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.w"></a>w</code></em>;</span></p></td>
<td>width of the rectangle</td>
</tr>
<tr>
<td><p><span class="term"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gint"><span class="type">gint</span></a> <em class="structfield"><code><a name="GstVideoRectangle.h"></a>h</code></em>;</span></p></td>
<td>height of the rectangle</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-SINK-HEIGHT:CAPS"></a><h3>GST_VIDEO_SINK_HEIGHT()</h3>
<pre class="programlisting">#define GST_VIDEO_SINK_HEIGHT(obj) (GST_VIDEO_SINK_CAST (obj)-&gt;height)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-SINK-PAD:CAPS"></a><h3>GST_VIDEO_SINK_PAD()</h3>
<pre class="programlisting">#define GST_VIDEO_SINK_PAD(obj) GST_BASE_SINK_PAD(obj)
</pre>
<p>
Get the sink <a href="/usr/share/gtk-doc/html/gstreamer-0.10/GstPad.html"><span class="type">GstPad</span></a> of <em class="parameter"><code>obj</code></em>.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><em class="parameter"><code>obj</code></em> :</span></p></td>
<td>a <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoSink"><span class="type">GstVideoSink</span></a>
</td>
</tr></tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GST-VIDEO-SINK-WIDTH:CAPS"></a><h3>GST_VIDEO_SINK_WIDTH()</h3>
<pre class="programlisting">#define GST_VIDEO_SINK_WIDTH(obj) (GST_VIDEO_SINK_CAST (obj)-&gt;width)
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-video-sink-center-rect"></a><h3>gst_video_sink_center_rect ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>                gst_video_sink_center_rect          (<em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> src</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> dst</code></em>,
                                                         <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> *result</code></em>,
                                                         <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> scaling</code></em>);</pre>
<p>
Takes <em class="parameter"><code>src</code></em> rectangle and position it at the center of <em class="parameter"><code>dst</code></em> rectangle with or
without <em class="parameter"><code>scaling</code></em>. It handles clipping if the <em class="parameter"><code>src</code></em> rectangle is bigger than
the <em class="parameter"><code>dst</code></em> one and <em class="parameter"><code>scaling</code></em> is set to FALSE.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>src</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> describing the source area</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>dst</code></em> :</span></p></td>
<td>the <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> describing the destination area</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>result</code></em> :</span></p></td>
<td>a pointer to a <a class="link" href="gst-plugins-base-libs-gstvideosink.html#GstVideoRectangle" title="struct GstVideoRectangle"><span class="type">GstVideoRectangle</span></a> which will receive the result area</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>scaling</code></em> :</span></p></td>
<td>a <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> indicating if scaling should be applied or not</td>
</tr>
</tbody>
</table></div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gstvideosink.property-details"></a><h2>Property Details</h2>
<div class="refsect2">
<a name="GstVideoSink--show-preroll-frame"></a><h3>The <code class="literal">"show-preroll-frame"</code> property</h3>
<pre class="programlisting">  "show-preroll-frame"       <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a>              : Read / Write / Construct</pre>
<p>
Whether to show video frames during preroll. If set to <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#FALSE:CAPS"><span class="type">FALSE</span></a>, video
frames will only be rendered in PLAYING state.
</p>
<p>Default value: TRUE</p>
<p class="since">Since 0.10.25</p>
</div>
</div>
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