| <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> |
| <html> |
| <head> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| <title>GstVideoAggregator: GStreamer Bad Plugins 1.0 Library Reference Manual</title> |
| <meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> |
| <link rel="home" href="index.html" title="GStreamer Bad Plugins 1.0 Library Reference Manual"> |
| <link rel="up" href="video.html" title="Video helpers and baseclasses"> |
| <link rel="prev" href="video.html" title="Video helpers and baseclasses"> |
| <link rel="next" href="gst-plugins-bad-libs-GstVideoAggregatorPad.html" title="GstVideoAggregatorPad"> |
| <meta name="generator" content="GTK-Doc V1.25 (XML mode)"> |
| <link rel="stylesheet" href="style.css" type="text/css"> |
| </head> |
| <body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> |
| <table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="5"><tr valign="middle"> |
| <td width="100%" align="left" class="shortcuts"> |
| <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> |
| </td> |
| <td><a accesskey="h" href="index.html"><img src="home.png" width="16" height="16" border="0" alt="Home"></a></td> |
| <td><a accesskey="u" href="video.html"><img src="up.png" width="16" height="16" border="0" alt="Up"></a></td> |
| <td><a accesskey="p" href="video.html"><img src="left.png" width="16" height="16" border="0" alt="Prev"></a></td> |
| <td><a accesskey="n" href="gst-plugins-bad-libs-GstVideoAggregatorPad.html"><img src="right.png" width="16" height="16" border="0" alt="Next"></a></td> |
| </tr></table> |
| <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 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-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> |
| <p></p> |
| </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="GstVideoAggregator.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" 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-1.0gst-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-1.0gst-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 { |
| GstCaps * (*update_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps, |
| GstCaps * filter_caps); |
| GstCaps * (*fixate_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps); |
| GstFlowReturn (*aggregate_frames) (GstVideoAggregator * videoaggregator, |
| GstBuffer * outbuffer); |
| GstFlowReturn (*get_output_buffer) (GstVideoAggregator * videoaggregator, |
| GstBuffer ** outbuffer); |
| gboolean (*negotiated_caps) (GstVideoAggregator * videoaggregator, |
| GstCaps * caps); |
| void (*find_best_format) (GstVideoAggregator * vagg, |
| GstCaps * downstream_caps, |
| GstVideoInfo * best_info, |
| gboolean * at_least_one_alpha); |
| |
| GstCaps *sink_non_alpha_caps; |
| }; |
| </pre> |
| <div class="refsect3"> |
| <a name="GstVideoAggregatorClass.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" 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><em class="structfield"><code><a name="GstVideoAggregatorClass.update-caps"></a>update_caps</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Optional. |
| Lets subclasses update the <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> representing |
| the src pad caps before usage. Return <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> to indicate failure.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.fixate-caps"></a>fixate_caps</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Fixate and return the src pad caps provided. The function takes |
| ownership of <em class="parameter"><code>caps</code></em> |
| and returns a fixated version of |
| <em class="parameter"><code>caps</code></em> |
| . <em class="parameter"><code>caps</code></em> |
| is not guaranteed to be writable.</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-1.0gst-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-1.0GstBuffer.html#GstBuffer-struct"><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-1.0GstBuffer.html#GstBuffer-struct"><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> |
| <tr> |
| <td class="struct_member_name"><p><em class="structfield"><code><a name="GstVideoAggregatorClass.find-best-format"></a>find_best_format</code></em> ()</p></td> |
| <td class="struct_member_description"><p>Optional. |
| Lets subclasses decide of the best common format to use.</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> *<em class="structfield"><code><a name="GstVideoAggregatorClass.sink-non-alpha-caps"></a>sink_non_alpha_caps</code></em>;</p></td> |
| <td> </td> |
| <td> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.25</div> |
| </body> |
| </html> |
