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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<a href="#gst-plugins-bad-libs-gstmpegvideometa.synopsis" class="shortcut">Top</a>
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<a href="#gst-plugins-bad-libs-gstmpegvideometa.description" class="shortcut">Description</a>
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<div class="refentry">
<a name="gst-plugins-bad-libs-gstmpegvideometa"></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-gstmpegvideometa.top_of_page"></a>gstmpegvideometa</span></h2>
<p>gstmpegvideometa</p>
</td>
<td valign="top" align="right"></td>
</tr></table></div>
<div class="refsynopsisdiv">
<a name="gst-plugins-bad-libs-gstmpegvideometa.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include <gst/codecparsers/gstmpegvideometa.h>
#define <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GST-MPEG-VIDEO-META-API-TYPE:CAPS" title="GST_MPEG_VIDEO_META_API_TYPE">GST_MPEG_VIDEO_META_API_TYPE</a>
#define <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GST-MPEG-VIDEO-META-INFO:CAPS" title="GST_MPEG_VIDEO_META_INFO">GST_MPEG_VIDEO_META_INFO</a>
struct <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta">GstMpegVideoMeta</a>;
<a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta"><span class="returnvalue">GstMpegVideoMeta</span></a> * <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#gst-buffer-add-mpeg-video-meta" title="gst_buffer_add_mpeg_video_meta ()">gst_buffer_add_mpeg_video_meta</a> (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceHdr" title="struct GstMpegVideoSequenceHdr"><span class="type">GstMpegVideoSequenceHdr</span></a> *seq_hdr</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceExt" title="struct GstMpegVideoSequenceExt"><span class="type">GstMpegVideoSequenceExt</span></a> *seq_ext</code></em>,
<em class="parameter"><code>const <span class="type">GstMpegVideoSequenceDisplayExt</span> *disp_ext</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureHdr" title="struct GstMpegVideoPictureHdr"><span class="type">GstMpegVideoPictureHdr</span></a> *pic_hdr</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureExt" title="struct GstMpegVideoPictureExt"><span class="type">GstMpegVideoPictureExt</span></a> *pic_ext</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoQuantMatrixExt" title="struct GstMpegVideoQuantMatrixExt"><span class="type">GstMpegVideoQuantMatrixExt</span></a> *quant_ext</code></em>);
#define <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#gst-buffer-get-mpeg-video-meta" title="gst_buffer_get_mpeg_video_meta()">gst_buffer_get_mpeg_video_meta</a> (b)
const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#gst-mpeg-video-meta-get-info" title="gst_mpeg_video_meta_get_info ()">gst_mpeg_video_meta_get_info</a> (<em class="parameter"><code><span class="type">void</span></code></em>);
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-gstmpegvideometa.description"></a><h2>Description</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-bad-libs-gstmpegvideometa.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="GST-MPEG-VIDEO-META-API-TYPE:CAPS"></a><h3>GST_MPEG_VIDEO_META_API_TYPE</h3>
<pre class="programlisting">#define GST_MPEG_VIDEO_META_API_TYPE (gst_mpeg_video_meta_api_get_type())
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GST-MPEG-VIDEO-META-INFO:CAPS"></a><h3>GST_MPEG_VIDEO_META_INFO</h3>
<pre class="programlisting">#define GST_MPEG_VIDEO_META_INFO (gst_mpeg_video_meta_get_info())
</pre>
</div>
<hr>
<div class="refsect2">
<a name="GstMpegVideoMeta"></a><h3>struct GstMpegVideoMeta</h3>
<pre class="programlisting">struct GstMpegVideoMeta {
GstMeta meta;
GstMpegVideoSequenceHdr *sequencehdr;
GstMpegVideoSequenceExt *sequenceext;
GstMpegVideoSequenceDisplayExt *sequencedispext;
GstMpegVideoPictureHdr *pichdr;
GstMpegVideoPictureExt *picext;
GstMpegVideoQuantMatrixExt *quantext;
guint num_slices;
gsize slice_offset;
};
</pre>
<p>
Extra buffer metadata describing the contents of a MPEG1/2 Video frame
</p>
<p>
Can be used by elements (mainly decoders) to avoid having to parse
Mpeg video 1/2 packets if it can be done upstream.
</p>
<p>
The various fields are only valid during the lifetime of the <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta"><span class="type">GstMpegVideoMeta</span></a>.
If elements wish to use those for longer, they are required to make a copy.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<col align="left" valign="top">
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<td><p><span class="term"><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a> <em class="structfield"><code><a name="GstMpegVideoMeta.meta"></a>meta</code></em>;</span></p></td>
<td>parent <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMeta"><span class="type">GstMeta</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceHdr" title="struct GstMpegVideoSequenceHdr"><span class="type">GstMpegVideoSequenceHdr</span></a> *<em class="structfield"><code><a name="GstMpegVideoMeta.sequencehdr"></a>sequencehdr</code></em>;</span></p></td>
<td>the <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceHdr" title="struct GstMpegVideoSequenceHdr"><span class="type">GstMpegVideoSequenceHdr</span></a> if present in the buffer</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceExt" title="struct GstMpegVideoSequenceExt"><span class="type">GstMpegVideoSequenceExt</span></a> *<em class="structfield"><code><a name="GstMpegVideoMeta.sequenceext"></a>sequenceext</code></em>;</span></p></td>
<td>the <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceExt" title="struct GstMpegVideoSequenceExt"><span class="type">GstMpegVideoSequenceExt</span></a> if present in the buffer</td>
</tr>
<tr>
<td><p><span class="term"><span class="type">GstMpegVideoSequenceDisplayExt</span> *<em class="structfield"><code><a name="GstMpegVideoMeta.sequencedispext"></a>sequencedispext</code></em>;</span></p></td>
<td>the <span class="type">GstMpegVideoSequenceDisplayExt</span> if present in the
buffer.</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureHdr" title="struct GstMpegVideoPictureHdr"><span class="type">GstMpegVideoPictureHdr</span></a> *<em class="structfield"><code><a name="GstMpegVideoMeta.pichdr"></a>pichdr</code></em>;</span></p></td>
<td>the <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureHdr" title="struct GstMpegVideoPictureHdr"><span class="type">GstMpegVideoPictureHdr</span></a> if present in the buffer.</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureExt" title="struct GstMpegVideoPictureExt"><span class="type">GstMpegVideoPictureExt</span></a> *<em class="structfield"><code><a name="GstMpegVideoMeta.picext"></a>picext</code></em>;</span></p></td>
<td>the <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureExt" title="struct GstMpegVideoPictureExt"><span class="type">GstMpegVideoPictureExt</span></a> if present in the buffer.</td>
</tr>
<tr>
<td><p><span class="term"><a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoQuantMatrixExt" title="struct GstMpegVideoQuantMatrixExt"><span class="type">GstMpegVideoQuantMatrixExt</span></a> *<em class="structfield"><code><a name="GstMpegVideoMeta.quantext"></a>quantext</code></em>;</span></p></td>
<td>the <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoQuantMatrixExt" title="struct GstMpegVideoQuantMatrixExt"><span class="type">GstMpegVideoQuantMatrixExt</span></a> if present in the buffer</td>
</tr>
<tr>
<td><p><span class="term"><a href="http://library.gnome.org/devel/glib/unstable/glib-Basic-Types.html#guint"><span class="type">guint</span></a> <em class="structfield"><code><a name="GstMpegVideoMeta.num-slices"></a>num_slices</code></em>;</span></p></td>
<td></td>
</tr>
<tr>
<td><p><span class="term"><span class="type">gsize</span> <em class="structfield"><code><a name="GstMpegVideoMeta.slice-offset"></a>slice_offset</code></em>;</span></p></td>
<td></td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-buffer-add-mpeg-video-meta"></a><h3>gst_buffer_add_mpeg_video_meta ()</h3>
<pre class="programlisting"><a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta"><span class="returnvalue">GstMpegVideoMeta</span></a> * gst_buffer_add_mpeg_video_meta (<em class="parameter"><code><a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceHdr" title="struct GstMpegVideoSequenceHdr"><span class="type">GstMpegVideoSequenceHdr</span></a> *seq_hdr</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoSequenceExt" title="struct GstMpegVideoSequenceExt"><span class="type">GstMpegVideoSequenceExt</span></a> *seq_ext</code></em>,
<em class="parameter"><code>const <span class="type">GstMpegVideoSequenceDisplayExt</span> *disp_ext</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureHdr" title="struct GstMpegVideoPictureHdr"><span class="type">GstMpegVideoPictureHdr</span></a> *pic_hdr</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoPictureExt" title="struct GstMpegVideoPictureExt"><span class="type">GstMpegVideoPictureExt</span></a> *pic_ext</code></em>,
<em class="parameter"><code>const <a class="link" href="gst-plugins-bad-libs-mpegvideoparser.html#GstMpegVideoQuantMatrixExt" title="struct GstMpegVideoQuantMatrixExt"><span class="type">GstMpegVideoQuantMatrixExt</span></a> *quant_ext</code></em>);</pre>
<p>
Creates and adds a <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta"><span class="type">GstMpegVideoMeta</span></a> to a <em class="parameter"><code>buffer</code></em>.
</p>
<p>
Provided structures must either be <a href="http://library.gnome.org/devel/glib/unstable/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> or GSlice-allocated.
</p>
<div class="variablelist"><table border="0" class="variablelist">
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<td><p><span class="term"><em class="parameter"><code>buffer</code></em> :</span></p></td>
<td>a <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a>
</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>a newly created <a class="link" href="gst-plugins-bad-libs-gstmpegvideometa.html#GstMpegVideoMeta" title="struct GstMpegVideoMeta"><span class="type">GstMpegVideoMeta</span></a>. <span class="annotation">[<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span>
</td>
</tr>
</tbody>
</table></div>
<p class="since">Since 1.2</p>
</div>
<hr>
<div class="refsect2">
<a name="gst-buffer-get-mpeg-video-meta"></a><h3>gst_buffer_get_mpeg_video_meta()</h3>
<pre class="programlisting">#define gst_buffer_get_mpeg_video_meta(b) ((GstMpegVideoMeta*)gst_buffer_get_meta((b),GST_MPEG_VIDEO_META_API_TYPE))
</pre>
</div>
<hr>
<div class="refsect2">
<a name="gst-mpeg-video-meta-get-info"></a><h3>gst_mpeg_video_meta_get_info ()</h3>
<pre class="programlisting">const <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstMeta.html#GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * gst_mpeg_video_meta_get_info (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
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