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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
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<title>GStreamer Bad Plugins 1.0 Library Reference Manual: GstVideoAggregator</title>
<meta name="generator" content="DocBook XSL Stylesheets V1.78.1">
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gst-plugins-bad-libs-GstVideoAggregator.description" class="shortcut">Description</a></span>
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<div class="refentry">
<a name="gst-plugins-bad-libs-GstVideoAggregator"></a><div class="titlepage"></div>
<div class="refnamediv"><table width="100%"><tr>
<td valign="top">
<h2><span class="refentrytitle"><a name="gst-plugins-bad-libs-GstVideoAggregator.top_of_page"></a>GstVideoAggregator</span></h2>
<p>GstVideoAggregator — Base class for video aggregators</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-GstVideoAggregator.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="name">
<col class="description">
</colgroup>
<tbody>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gst-plugins-bad-libs-GstVideoAggregator.html#GstVideoAggregator" title="struct GstVideoAggregator">GstVideoAggregator</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gst-plugins-bad-libs-GstVideoAggregator.html#GstVideoAggregatorClass" title="struct GstVideoAggregatorClass">GstVideoAggregatorClass</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-GstVideoAggregator.description"></a><h2>Description</h2>
<p>VideoAggregator can accept AYUV, ARGB and BGRA video streams. For each of the requested
sink pads it will compare the incoming geometry and framerate to define the
output parameters. Indeed output video frames will have the geometry of the
biggest incoming video stream and the framerate of the fastest incoming one.</p>
<p>VideoAggregator will do colorspace conversion.</p>
<p>Zorder for each input stream can be configured on the
<a class="link" href="gst-plugins-bad-libs-GstVideoAggregatorPad.html#GstVideoAggregatorPad" title="struct GstVideoAggregatorPad"><span class="type">GstVideoAggregatorPad</span></a>.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-GstVideoAggregator.functions_details"></a><h2>Functions</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-GstVideoAggregator.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstVideoAggregator"></a><h3>struct GstVideoAggregator</h3>
<pre class="programlisting">struct GstVideoAggregator {
  GstAggregator aggregator;

  /* Output caps */
  GstVideoInfo info;
};
</pre>
<div class="refsect3">
<a name="id-1.2.8.2.6.2.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a class="link" href="gst-plugins-bad-libs-GstAggregator.html#GstAggregator" title="struct GstAggregator"><span class="type">GstAggregator</span></a> <em class="structfield"><code><a name="GstVideoAggregator.aggregator"></a>aggregator</code></em>;</p></td>
<td> </td>
<td> </td>
</tr>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstvideo.html#GstVideoInfo"><span class="type">GstVideoInfo</span></a> <em class="structfield"><code><a name="GstVideoAggregator.info"></a>info</code></em>;</p></td>
<td class="struct_member_description"><p>The <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstvideo.html#GstVideoInfo"><span class="type">GstVideoInfo</span></a> representing the currently set
srcpad caps.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoAggregatorClass"></a><h3>struct GstVideoAggregatorClass</h3>
<pre class="programlisting">struct GstVideoAggregatorClass {
  gboolean           disable_frame_conversion;

  gboolean           (*update_info)               (GstVideoAggregator *  videoaggregator,
                                                   GstVideoInfo       *  info);
  GstFlowReturn      (*aggregate_frames)          (GstVideoAggregator *  videoaggregator,
                                                   GstBuffer          *  outbuffer);
  GstFlowReturn      (*get_output_buffer)         (GstVideoAggregator *  videoaggregator,
                                                   GstBuffer          ** outbuffer);
  gboolean           (*negotiated_caps)           (GstVideoAggregator *  videoaggregator,
                                                   GstCaps            *  caps);
};
</pre>
<div class="refsect3">
<a name="id-1.2.8.2.6.3.4"></a><h4>Members</h4>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="300px" class="struct_members_name">
<col class="struct_members_description">
<col width="200px" class="struct_members_annotations">
</colgroup>
<tbody>
<tr>
<td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstVideoAggregatorClass.disable-frame-conversion"></a>disable_frame_conversion</code></em>;</p></td>
<td class="struct_member_description"><p>Optional.
Allows subclasses to disable the frame colorspace
conversion feature</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.update-info"></a>update_info</code></em> ()</p></td>
<td class="struct_member_description"><p>Optional.
Lets subclasses update the src <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstvideo.html#GstVideoInfo"><span class="type">GstVideoInfo</span></a> representing
the src pad caps before usage.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.aggregate-frames"></a>aggregate_frames</code></em> ()</p></td>
<td class="struct_member_description"><p>Lets subclasses aggregate frames that are ready. Subclasses
should iterate the GstElement.sinkpads and use the already
mapped <a href="/usr/share/gtk-doc/html/gst-plugins-base-libs-1.0/gst-plugins-base-libs-gstvideo.html#GstVideoFrame"><span class="type">GstVideoFrame</span></a> from GstVideoAggregatorPad.aggregated_frame
or directly use the <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBuffer.html"><span class="type">GstBuffer</span></a> from GstVideoAggregatorPad.buffer
if it needs to map the buffer in a special way. The result of the
aggregation should land in <em class="parameter"><code>outbuffer</code></em>
.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.get-output-buffer"></a>get_output_buffer</code></em> ()</p></td>
<td class="struct_member_description"><p>Optional.
Lets subclasses provide a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBuffer.html"><span class="type">GstBuffer</span></a> to be used as <em class="parameter"><code>outbuffer</code></em>
of
the <span class="type">aggregate_frames</span> vmethod.</p></td>
<td class="struct_member_annotations"> </td>
</tr>
<tr>
<td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.negotiated-caps"></a>negotiated_caps</code></em> ()</p></td>
<td class="struct_member_description"><p>Optional.
Notifies subclasses what caps format has been negotiated</p></td>
<td class="struct_member_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
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