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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
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<title>GstVideoPool: GStreamer Base Plugins 1.0 Library Reference Manual</title>
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<link rel="home" href="index.html" title="GStreamer Base Plugins 1.0 Library Reference Manual">
<link rel="up" href="gstreamer-video.html" title="Video Library">
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<a href="#" class="shortcut">Top</a><span id="nav_description">  <span class="dim">|</span> 
                  <a href="#gst-plugins-base-libs-GstVideoPool.description" class="shortcut">Description</a></span>
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<td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td>
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<div class="refentry">
<a name="gst-plugins-base-libs-GstVideoPool"></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-GstVideoPool.top_of_page"></a>GstVideoPool</span></h2>
<p>GstVideoPool — GstBufferPool for raw video buffers</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.functions"></a><h2>Functions</h2>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBufferPool.html#GstBufferPool-struct"><span class="returnvalue">GstBufferPool</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstVideoPool.html#gst-video-buffer-pool-new" title="gst_video_buffer_pool_new ()">gst_video_buffer_pool_new</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstVideoPool.html#gst-buffer-pool-config-get-video-alignment" title="gst_buffer_pool_config_get_video_alignment ()">gst_buffer_pool_config_get_video_alignment</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<span class="returnvalue">void</span>
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-GstVideoPool.html#gst-buffer-pool-config-set-video-alignment" title="gst_buffer_pool_config_set_video_alignment ()">gst_buffer_pool_config_set_video_alignment</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.other"></a><h2>Types and Values</h2>
<div class="informaltable"><table class="informaltable" 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-base-libs-GstVideoPool.html#GstVideoBufferPool" title="struct GstVideoBufferPool">GstVideoBufferPool</a></td>
</tr>
<tr>
<td class="datatype_keyword">struct</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstVideoPool.html#GstVideoBufferPoolClass" title="struct GstVideoBufferPoolClass">GstVideoBufferPoolClass</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstVideoPool.html#GST-BUFFER-POOL-OPTION-VIDEO-ALIGNMENT:CAPS" title="GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT">GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT</a></td>
</tr>
<tr>
<td class="define_keyword">#define</td>
<td class="function_name"><a class="link" href="gst-plugins-base-libs-GstVideoPool.html#GST-BUFFER-POOL-OPTION-VIDEO-META:CAPS" title="GST_BUFFER_POOL_OPTION_VIDEO_META">GST_BUFFER_POOL_OPTION_VIDEO_META</a></td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include &lt;gst/video/gstvideopool.h&gt;
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.description"></a><h2>Description</h2>
<p>Special GstBufferPool subclass for raw video buffers.</p>
<p>Allows configuration of video-specific requirements such as
stride alignments or pixel padding, and can also be configured
to automatically add <a class="link" href="gst-plugins-base-libs-gstvideometa.html#GstVideoMeta" title="struct GstVideoMeta"><span class="type">GstVideoMeta</span></a> to the buffers.</p>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-video-buffer-pool-new"></a><h3>gst_video_buffer_pool_new ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBufferPool.html#GstBufferPool-struct"><span class="returnvalue">GstBufferPool</span></a> *
gst_video_buffer_pool_new (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>Create a new bufferpool that can allocate video frames. This bufferpool
supports all the video bufferpool options.</p>
<div class="refsect3">
<a name="gst-video-buffer-pool-new.returns"></a><h4>Returns</h4>
<p> a new <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBufferPool.html#GstBufferPool-struct"><span class="type">GstBufferPool</span></a> to allocate video frames. </p>
<p><span class="annotation">[<acronym title="Alias for transfer none, used for objects with floating refs."><span class="acronym">transfer floating</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-buffer-pool-config-get-video-alignment"></a><h3>gst_buffer_pool_config_get_video_alignment ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a>
gst_buffer_pool_config_get_video_alignment
                               (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> *config</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoAlignment" title="struct GstVideoAlignment"><span class="type">GstVideoAlignment</span></a> *align</code></em>);</pre>
<p>Get the video alignment from the bufferpool configuration <em class="parameter"><code>config</code></em>
 in
in <em class="parameter"><code>align</code></em>
</p>
<div class="refsect3">
<a name="gst-buffer-pool-config-get-video-alignment.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>config</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>align</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoAlignment" title="struct GstVideoAlignment"><span class="type">GstVideoAlignment</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="gst-buffer-pool-config-get-video-alignment.returns"></a><h4>Returns</h4>
<p> <a href="/usr/share/gtk-doc/html/glib/glib-Standard-Macros.html#TRUE:CAPS"><span class="type">TRUE</span></a> if <em class="parameter"><code>config</code></em>
could be parsed correctly.</p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-buffer-pool-config-set-video-alignment"></a><h3>gst_buffer_pool_config_set_video_alignment ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_buffer_pool_config_set_video_alignment
                               (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a> *config</code></em>,
                                <em class="parameter"><code><a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoAlignment" title="struct GstVideoAlignment"><span class="type">GstVideoAlignment</span></a> *align</code></em>);</pre>
<p>Set the video alignment in <em class="parameter"><code>align</code></em>
 to the bufferpool configuration
<em class="parameter"><code>config</code></em>
</p>
<div class="refsect3">
<a name="gst-buffer-pool-config-set-video-alignment.parameters"></a><h4>Parameters</h4>
<div class="informaltable"><table class="informaltable" width="100%" border="0">
<colgroup>
<col width="150px" class="parameters_name">
<col class="parameters_description">
<col width="200px" class="parameters_annotations">
</colgroup>
<tbody>
<tr>
<td class="parameter_name"><p>config</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstStructure.html#GstStructure-struct"><span class="type">GstStructure</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>align</p></td>
<td class="parameter_description"><p>a <a class="link" href="gst-plugins-base-libs-gstvideo.html#GstVideoAlignment" title="struct GstVideoAlignment"><span class="type">GstVideoAlignment</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.other_details"></a><h2>Types and Values</h2>
<div class="refsect2">
<a name="GstVideoBufferPool"></a><h3>struct GstVideoBufferPool</h3>
<pre class="programlisting">struct GstVideoBufferPool {
  GstBufferPool bufferpool;

  GstVideoBufferPoolPrivate *priv;
};
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstVideoBufferPoolClass"></a><h3>struct GstVideoBufferPoolClass</h3>
<pre class="programlisting">struct GstVideoBufferPoolClass {
  GstBufferPoolClass parent_class;
};
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-BUFFER-POOL-OPTION-VIDEO-ALIGNMENT:CAPS"></a><h3>GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT</h3>
<pre class="programlisting">#define GST_BUFFER_POOL_OPTION_VIDEO_ALIGNMENT "GstBufferPoolOptionVideoAlignment"
</pre>
<p>A bufferpool option to enable extra padding. When a bufferpool supports this
option, <a class="link" href="gst-plugins-base-libs-GstVideoPool.html#gst-buffer-pool-config-set-video-alignment" title="gst_buffer_pool_config_set_video_alignment ()"><code class="function">gst_buffer_pool_config_set_video_alignment()</code></a> can be called.</p>
<p>When this option is enabled on the bufferpool,
<a class="link" href="gst-plugins-base-libs-GstVideoPool.html#GST-BUFFER-POOL-OPTION-VIDEO-META:CAPS" title="GST_BUFFER_POOL_OPTION_VIDEO_META"><span class="type">GST_BUFFER_POOL_OPTION_VIDEO_META</span></a> should also be enabled.</p>
</div>
<hr>
<div class="refsect2">
<a name="GST-BUFFER-POOL-OPTION-VIDEO-META:CAPS"></a><h3>GST_BUFFER_POOL_OPTION_VIDEO_META</h3>
<pre class="programlisting">#define GST_BUFFER_POOL_OPTION_VIDEO_META "GstBufferPoolOptionVideoMeta"
</pre>
<p>An option that can be activated on bufferpool to request video metadata
on buffers from the pool.</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-GstVideoPool.see-also"></a><h2>See Also</h2>
<p><a href="/usr/share/gtk-doc/html/gstreamer-1.0/GstBufferPool.html#GstBufferPool-struct"><span class="type">GstBufferPool</span></a></p>
</div>
</div>
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