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<div class="refentry">
<a name="gst-plugins-base-libs-gsttagvorbis"></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-gsttagvorbis.top_of_page"></a>gsttagvorbis</span></h2>
<p>gsttagvorbis — tag mappings and support functions for plugins
dealing with vorbiscomments</p>
</td>
<td class="gallery_image" valign="top" align="right"></td>
</tr></table></div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.functions"></a><h2>Functions</h2>
<div class="informaltable"><table width="100%" border="0">
<colgroup>
<col width="150px" class="functions_return">
<col class="functions_name">
</colgroup>
<tbody>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-from-vorbis-tag" title="gst_tag_from_vorbis_tag ()">gst_tag_from_vorbis_tag</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-to-vorbis-tag" title="gst_tag_to_vorbis_tag ()">gst_tag_to_vorbis_tag</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-gsttagvorbis.html#gst-vorbis-tag-add" title="gst_vorbis_tag_add ()">gst_vorbis_tag_add</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-to-vorbis-comments" title="gst_tag_to_vorbis_comments ()">gst_tag_to_vorbis_comments</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-list-from-vorbiscomment" title="gst_tag_list_from_vorbiscomment ()">gst_tag_list_from_vorbiscomment</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-list-from-vorbiscomment-buffer" title="gst_tag_list_from_vorbiscomment_buffer ()">gst_tag_list_from_vorbiscomment_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
<tr>
<td class="function_type">
<a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
</td>
<td class="function_name">
<a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-list-to-vorbiscomment-buffer" title="gst_tag_list_to_vorbiscomment_buffer ()">gst_tag_list_to_vorbiscomment_buffer</a> <span class="c_punctuation">()</span>
</td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.object-hierarchy"></a><h2>Object Hierarchy</h2>
<pre class="screen">
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.includes"></a><h2>Includes</h2>
<pre class="synopsis">#include <gst/tag/tag.h>
</pre>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.description"></a><h2>Description</h2>
<div class="refsect2">
<a name="id-1.2.12.4.6.2"></a><p>
Contains various utility functions for plugins to parse or create
vorbiscomments and map them to and from <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a>s.
</p>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.functions_details"></a><h2>Functions</h2>
<div class="refsect2">
<a name="gst-tag-from-vorbis-tag"></a><h3>gst_tag_from_vorbis_tag ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_tag_from_vorbis_tag (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *vorbis_tag</code></em>);</pre>
<p>Looks up the GStreamer tag for a vorbiscomment tag.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.2.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>vorbis_tag</p></td>
<td class="parameter_description"><p>vorbiscomment tag to convert to GStreamer tag</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.2.6"></a><h4>Returns</h4>
<p> The corresponding GStreamer tag or NULL if none exists.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-tag-to-vorbis-tag"></a><h3>gst_tag_to_vorbis_tag ()</h3>
<pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *
gst_tag_to_vorbis_tag (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *gst_tag</code></em>);</pre>
<p>Looks up the vorbiscomment tag for a GStreamer tag.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.3.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>gst_tag</p></td>
<td class="parameter_description"><p>GStreamer tag to convert to vorbiscomment tag</p></td>
<td class="parameter_annotations"> </td>
</tr></tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.3.6"></a><h4>Returns</h4>
<p> The corresponding vorbiscomment tag or NULL if none exists.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-vorbis-tag-add"></a><h3>gst_vorbis_tag_add ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span>
gst_vorbis_tag_add (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *list</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *tag</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *value</code></em>);</pre>
<p>Convenience function using <a class="link" href="gst-plugins-base-libs-gsttagvorbis.html#gst-tag-from-vorbis-tag" title="gst_tag_from_vorbis_tag ()"><code class="function">gst_tag_from_vorbis_tag()</code></a>, parsing
a vorbis comment string into the right type and adding it to the
given taglist <em class="parameter"><code>list</code></em>
.</p>
<p>Unknown vorbiscomment tags will be added to the tag list in form
of a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GST-TAG-EXTENDED-COMMENT:CAPS"><span class="type">GST_TAG_EXTENDED_COMMENT</span></a>.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.4.6"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>list</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tag</p></td>
<td class="parameter_description"><p>a vorbiscomment tag string (key in key=value), must be valid UTF-8</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>value</p></td>
<td class="parameter_description"><p>a vorbiscomment value string (value in key=value), must be valid UTF-8</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-tag-to-vorbis-comments"></a><h3>gst_tag_to_vorbis_comments ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="returnvalue">GList</span></a> *
gst_tag_to_vorbis_comments (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *list</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *tag</code></em>);</pre>
<p>Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.5.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>list</p></td>
<td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>tag</p></td>
<td class="parameter_description"><p>a GStreamer tag identifier, such as <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GST-TAG-ARTIST:CAPS"><span class="type">GST_TAG_ARTIST</span></a></p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.5.6"></a><h4>Returns</h4>
<p> A <a href="/usr/share/gtk-doc/html/glib/glib-Doubly-Linked-Lists.html#GList"><span class="type">GList</span></a> of newly-allocated
key=value strings. Free with g_list_foreach (list, (GFunc) g_free, NULL)
plus g_list_free (list). </p>
<p><span class="annotation">[<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8][<acronym title="Free data after the code is done."><span class="acronym">transfer full</span></acronym>]</span></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-tag-list-from-vorbiscomment"></a><h3>gst_tag_list_from_vorbiscomment ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> *
gst_tag_list_from_vorbiscomment (<em class="parameter"><code>const <span class="type">guint8</span> *data</code></em>,
<em class="parameter"><code><span class="type">gsize</span> size</code></em>,
<em class="parameter"><code>const <span class="type">guint8</span> *id_data</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> id_data_length</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **vendor_string</code></em>);</pre>
<p>Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.6.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>data</p></td>
<td class="parameter_description"><p>data to convert</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>size</p></td>
<td class="parameter_description"><p>size of <em class="parameter"><code>data</code></em>
</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data</p></td>
<td class="parameter_description"><p>identification data at start of stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data_length</p></td>
<td class="parameter_description"><p>length of identification data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>vendor_string</p></td>
<td class="parameter_description"><p>pointer to a string that should take the vendor string
of this vorbis comment or NULL if you don't need it.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.6.6"></a><h4>Returns</h4>
<p> A new <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> with all tags that could be extracted from the
given vorbiscomment buffer or NULL on error.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-tag-list-from-vorbiscomment-buffer"></a><h3>gst_tag_list_from_vorbiscomment_buffer ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="returnvalue">GstTagList</span></a> *
gst_tag_list_from_vorbiscomment_buffer
(<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>,
<em class="parameter"><code>const <span class="type">guint8</span> *id_data</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> id_data_length</code></em>,
<em class="parameter"><code><a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **vendor_string</code></em>);</pre>
<p>Creates a new tag list that contains the information parsed out of a
vorbiscomment packet.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.7.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>buffer</p></td>
<td class="parameter_description"><p>buffer to convert</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data</p></td>
<td class="parameter_description"><p>identification data at start of stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data_length</p></td>
<td class="parameter_description"><p>length of identification data</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>vendor_string</p></td>
<td class="parameter_description"><p>pointer to a string that should take the vendor string
of this vorbis comment or NULL if you don't need it.</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.7.6"></a><h4>Returns</h4>
<p> A new <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> with all tags that could be extracted from the
given vorbiscomment buffer or NULL on error.</p>
<p></p>
</div>
</div>
<hr>
<div class="refsect2">
<a name="gst-tag-list-to-vorbiscomment-buffer"></a><h3>gst_tag_list_to_vorbiscomment_buffer ()</h3>
<pre class="programlisting"><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="returnvalue">GstBuffer</span></a> *
gst_tag_list_to_vorbiscomment_buffer (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a> *list</code></em>,
<em class="parameter"><code>const <span class="type">guint8</span> *id_data</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> id_data_length</code></em>,
<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *vendor_string</code></em>);</pre>
<p>Creates a new vorbiscomment buffer from a tag list.</p>
<div class="refsect3">
<a name="id-1.2.12.4.7.8.5"></a><h4>Parameters</h4>
<div class="informaltable"><table 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>list</p></td>
<td class="parameter_description"><p>tag list to convert</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data</p></td>
<td class="parameter_description"><p>identification data at start of stream</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>id_data_length</p></td>
<td class="parameter_description"><p>length of identification data, may be 0 if <em class="parameter"><code>id_data</code></em>
is NULL</p></td>
<td class="parameter_annotations"> </td>
</tr>
<tr>
<td class="parameter_name"><p>vendor_string</p></td>
<td class="parameter_description"><p>string that describes the vendor string or NULL</p></td>
<td class="parameter_annotations"> </td>
</tr>
</tbody>
</table></div>
</div>
<div class="refsect3">
<a name="id-1.2.12.4.7.8.6"></a><h4>Returns</h4>
<p> A new <a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstBuffer.html#GstBuffer"><span class="type">GstBuffer</span></a> containing a vorbiscomment buffer with all tags
that could be converted from the given tag list.</p>
<p></p>
</div>
</div>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.other_details"></a><h2>Types and Values</h2>
</div>
<div class="refsect1">
<a name="gst-plugins-base-libs-gsttagvorbis.see-also"></a><h2>See Also</h2>
<p><a href="/usr/share/gtk-doc/html/gstreamer-1.0/gstreamer-GstTagList.html#GstTagList"><span class="type">GstTagList</span></a></p>
</div>
</div>
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