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| <a href="#" class="shortcut">Top</a><span id="nav_description"> <span class="dim">|</span> |
| <a href="#gstreamer-GstMeta.description" class="shortcut">Description</a></span> |
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| <div class="refentry"> |
| <a name="gstreamer-GstMeta"></a><div class="titlepage"></div> |
| <div class="refnamediv"><table width="100%"><tr> |
| <td valign="top"> |
| <h2><span class="refentrytitle"><a name="gstreamer-GstMeta.top_of_page"></a>GstMeta</span></h2> |
| <p>GstMeta — Buffer metadata</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.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="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#GST-META-FLAGS:CAPS" title="GST_META_FLAGS()">GST_META_FLAGS</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#GST-META-FLAG-IS-SET:CAPS" title="GST_META_FLAG_IS_SET()">GST_META_FLAG_IS_SET</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#GST-META-FLAG-SET:CAPS" title="GST_META_FLAG_SET()">GST_META_FLAG_SET</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#GST-META-FLAG-UNSET:CAPS" title="GST_META_FLAG_UNSET()">GST_META_FLAG_UNSET</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <span class="c_punctuation">(</span><a class="link" href="gstreamer-GstMeta.html#GstMetaInitFunction" title="GstMetaInitFunction ()">*GstMetaInitFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <span class="returnvalue">void</span> |
| </td> |
| <td class="function_name"> |
| <span class="c_punctuation">(</span><a class="link" href="gstreamer-GstMeta.html#GstMetaFreeFunction" title="GstMetaFreeFunction ()">*GstMetaFreeFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <span class="c_punctuation">(</span><a class="link" href="gstreamer-GstMeta.html#GstMetaTransformFunction" title="GstMetaTransformFunction ()">*GstMetaTransformFunction</a><span class="c_punctuation">)</span> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#GST-META-TRANSFORM-IS-COPY:CAPS" title="GST_META_TRANSFORM_IS_COPY()">GST_META_TRANSFORM_IS_COPY</a><span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="returnvalue">GType</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#gst-meta-api-type-register" title="gst_meta_api_type_register ()">gst_meta_api_type_register</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#gst-meta-api-type-has-tag" title="gst_meta_api_type_has_tag ()">gst_meta_api_type_has_tag</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type">const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * const* |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#gst-meta-api-type-get-tags" title="gst_meta_api_type_get_tags ()">gst_meta_api_type_get_tags</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type">const <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#gst-meta-register" title="gst_meta_register ()">gst_meta_register</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type">const <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gstreamer-GstMeta.html#gst-meta-get-info" title="gst_meta_get_info ()">gst_meta_get_info</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.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="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta">GstMeta</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword">enum</td> |
| <td class="function_name"><a class="link" href="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags">GstMetaFlags</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword">struct</td> |
| <td class="function_name"><a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo">GstMetaInfo</a></td> |
| </tr> |
| <tr> |
| <td class="datatype_keyword"> </td> |
| <td class="function_name"><a class="link" href="gstreamer-GstMeta.html#GstMetaTransformCopy" title="GstMetaTransformCopy">GstMetaTransformCopy</a></td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"><a class="link" href="gstreamer-GstMeta.html#GST-META-TAG-MEMORY:CAPS" title="GST_META_TAG_MEMORY">GST_META_TAG_MEMORY</a></td> |
| </tr> |
| <tr> |
| <td class="define_keyword">#define</td> |
| <td class="function_name"><a class="link" href="gstreamer-GstMeta.html#GST-META-TAG-MEMORY-STR:CAPS" title="GST_META_TAG_MEMORY_STR">GST_META_TAG_MEMORY_STR</a></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gst/gst.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.description"></a><h2>Description</h2> |
| <p>The <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> structure should be included as the first member of a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> |
| metadata structure. The structure defines the API of the metadata and should |
| be accessible to all elements using the metadata.</p> |
| <p>A metadata API is registered with <a class="link" href="gstreamer-GstMeta.html#gst-meta-api-type-register" title="gst_meta_api_type_register ()"><code class="function">gst_meta_api_type_register()</code></a> which takes a |
| name for the metadata API and some tags associated with the metadata. |
| With <a class="link" href="gstreamer-GstMeta.html#gst-meta-api-type-has-tag" title="gst_meta_api_type_has_tag ()"><code class="function">gst_meta_api_type_has_tag()</code></a> one can check if a certain metadata API |
| contains a given tag.</p> |
| <p>Multiple implementations of a metadata API can be registered. |
| To implement a metadata API, <a class="link" href="gstreamer-GstMeta.html#gst-meta-register" title="gst_meta_register ()"><code class="function">gst_meta_register()</code></a> should be used. This |
| function takes all parameters needed to create, free and transform metadata |
| along with the size of the metadata. The function returns a <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a> |
| structure that contains the information for the implementation of the API.</p> |
| <p>A specific implementation can be retrieved by name with <a class="link" href="gstreamer-GstMeta.html#gst-meta-get-info" title="gst_meta_get_info ()"><code class="function">gst_meta_get_info()</code></a>.</p> |
| <p>See <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> for how the metadata can be added, retrieved and removed from |
| buffers.</p> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="GST-META-FLAGS:CAPS"></a><h3>GST_META_FLAGS()</h3> |
| <pre class="programlisting">#define GST_META_FLAGS(meta) (GST_META_CAST (meta)->flags) |
| </pre> |
| <p>A flags word containing <a class="link" href="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags"><span class="type">GstMetaFlags</span></a> flags set on <em class="parameter"><code>meta</code></em> |
| </p> |
| <div class="refsect3"> |
| <a name="GST-META-FLAGS.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-FLAG-IS-SET:CAPS"></a><h3>GST_META_FLAG_IS_SET()</h3> |
| <pre class="programlisting">#define GST_META_FLAG_IS_SET(meta,flag) !!(GST_META_FLAGS (meta) & (flag)) |
| </pre> |
| <p>Gives the status of a specific flag on a metadata.</p> |
| <div class="refsect3"> |
| <a name="GST-META-FLAG-IS-SET.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flag</p></td> |
| <td class="parameter_description"><p>the <a class="link" href="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags"><span class="type">GstMetaFlags</span></a> to check.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-FLAG-SET:CAPS"></a><h3>GST_META_FLAG_SET()</h3> |
| <pre class="programlisting">#define GST_META_FLAG_SET(meta,flag) (GST_META_FLAGS (meta) |= (flag)) |
| </pre> |
| <p>Sets a metadata flag on a metadata.</p> |
| <div class="refsect3"> |
| <a name="GST-META-FLAG-SET.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flag</p></td> |
| <td class="parameter_description"><p>the <a class="link" href="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags"><span class="type">GstMetaFlags</span></a> to set.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-FLAG-UNSET:CAPS"></a><h3>GST_META_FLAG_UNSET()</h3> |
| <pre class="programlisting">#define GST_META_FLAG_UNSET(meta,flag) (GST_META_FLAGS (meta) &= ~(flag)) |
| </pre> |
| <p>Clears a metadata flag.</p> |
| <div class="refsect3"> |
| <a name="GST-META-FLAG-UNSET.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a>.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>flag</p></td> |
| <td class="parameter_description"><p>the <a class="link" href="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags"><span class="type">GstMetaFlags</span></a> to clear.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaInitFunction"></a><h3>GstMetaInitFunction ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| <span class="c_punctuation">(</span>*GstMetaInitFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> *meta</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> params</code></em>, |
| <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre> |
| <p>Function called when <em class="parameter"><code>meta</code></em> |
| is initialized in <em class="parameter"><code>buffer</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="GstMetaInitFunction.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>params</p></td> |
| <td class="parameter_description"><p>parameters passed to the init function</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>buffer</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaFreeFunction"></a><h3>GstMetaFreeFunction ()</h3> |
| <pre class="programlisting"><span class="returnvalue">void</span> |
| <span class="c_punctuation">(</span>*GstMetaFreeFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> *meta</code></em>, |
| <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>);</pre> |
| <p>Function called when <em class="parameter"><code>meta</code></em> |
| is freed in <em class="parameter"><code>buffer</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="GstMetaFreeFunction.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>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>buffer</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaTransformFunction"></a><h3>GstMetaTransformFunction ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| <span class="c_punctuation">(</span>*GstMetaTransformFunction<span class="c_punctuation">)</span> (<em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *transbuf</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> *meta</code></em>, |
| <em class="parameter"><code><a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a> *buffer</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Quarks.html#GQuark"><span class="type">GQuark</span></a> type</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gpointer"><span class="type">gpointer</span></a> data</code></em>);</pre> |
| <p>Function called for each <em class="parameter"><code>meta</code></em> |
| in <em class="parameter"><code>buffer</code></em> |
| as a result of performing a |
| transformation on <em class="parameter"><code>transbuf</code></em> |
| . Additional <em class="parameter"><code>type</code></em> |
| specific transform data |
| is passed to the function as <em class="parameter"><code>data</code></em> |
| .</p> |
| <p>Implementations should check the <em class="parameter"><code>type</code></em> |
| of the transform and parse |
| additional type specific fields in <em class="parameter"><code>data</code></em> |
| that should be used to update |
| the metadata on <em class="parameter"><code>transbuf</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="GstMetaTransformFunction.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>transbuf</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>meta</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>buffer</p></td> |
| <td class="parameter_description"><p>a <a class="link" href="GstBuffer.html" title="GstBuffer"><span class="type">GstBuffer</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>type</p></td> |
| <td class="parameter_description"><p>the transform type</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>data</p></td> |
| <td class="parameter_description"><p>transform specific data.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="GstMetaTransformFunction.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the transform could be performed</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-TRANSFORM-IS-COPY:CAPS"></a><h3>GST_META_TRANSFORM_IS_COPY()</h3> |
| <pre class="programlisting">#define GST_META_TRANSFORM_IS_COPY(type) ((type) == _gst_meta_transform_copy) |
| </pre> |
| <p>Check if the transform type is a copy transform</p> |
| <div class="refsect3"> |
| <a name="GST-META-TRANSFORM-IS-COPY.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>type</p></td> |
| <td class="parameter_description"><p>a transform type</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-meta-api-type-register"></a><h3>gst_meta_api_type_register ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="returnvalue">GType</span></a> |
| gst_meta_api_type_register (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *api</code></em>, |
| <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> **tags</code></em>);</pre> |
| <p>Register and return a GType for the <em class="parameter"><code>api</code></em> |
| and associate it with |
| <em class="parameter"><code>tags</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-register.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>api</p></td> |
| <td class="parameter_description"><p>an API to register</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>tags</p></td> |
| <td class="parameter_description"><p>tags for <em class="parameter"><code>api</code></em> |
| </p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-register.returns"></a><h4>Returns</h4> |
| <p> a unique GType for <em class="parameter"><code>api</code></em> |
| .</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-meta-api-type-has-tag"></a><h3>gst_meta_api_type_has_tag ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_meta_api_type_has_tag (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="type">GType</span></a> api</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Quarks.html#GQuark"><span class="type">GQuark</span></a> tag</code></em>);</pre> |
| <p>Check if <em class="parameter"><code>api</code></em> |
| was registered with <em class="parameter"><code>tag</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-has-tag.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>api</p></td> |
| <td class="parameter_description"><p>an API</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>tag</p></td> |
| <td class="parameter_description"><p>the tag to check</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-has-tag.returns"></a><h4>Returns</h4> |
| <p> <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if <em class="parameter"><code>api</code></em> |
| was registered with <em class="parameter"><code>tag</code></em> |
| .</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-meta-api-type-get-tags"></a><h3>gst_meta_api_type_get_tags ()</h3> |
| <pre class="programlisting">const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * const* |
| gst_meta_api_type_get_tags (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="type">GType</span></a> api</code></em>);</pre> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-get-tags.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>api</p></td> |
| <td class="parameter_description"><p>an API</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-meta-api-type-get-tags.returns"></a><h4>Returns</h4> |
| <p> an array of tags as strings. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="Parameter points to an array of items."><span class="acronym">array</span></acronym> zero-terminated=1][<acronym title="Generics and defining elements of containers and arrays."><span class="acronym">element-type</span></acronym> utf8]</span></p> |
| </div> |
| <p class="since">Since: <a class="link" href="ix06.html#api-index-1.2">1.2</a></p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-meta-register"></a><h3>gst_meta_register ()</h3> |
| <pre class="programlisting">const <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| gst_meta_register (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="type">GType</span></a> api</code></em>, |
| <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *impl</code></em>, |
| <em class="parameter"><code><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gsize"><span class="type">gsize</span></a> size</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMetaInitFunction" title="GstMetaInitFunction ()"><span class="type">GstMetaInitFunction</span></a> init_func</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMetaFreeFunction" title="GstMetaFreeFunction ()"><span class="type">GstMetaFreeFunction</span></a> free_func</code></em>, |
| <em class="parameter"><code><a class="link" href="gstreamer-GstMeta.html#GstMetaTransformFunction" title="GstMetaTransformFunction ()"><span class="type">GstMetaTransformFunction</span></a> transform_func</code></em>);</pre> |
| <p>Register a new <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> implementation.</p> |
| <p>The same <em class="parameter"><code>info</code></em> |
| can be retrieved later with <a class="link" href="gstreamer-GstMeta.html#gst-meta-get-info" title="gst_meta_get_info ()"><code class="function">gst_meta_get_info()</code></a> by using |
| <em class="parameter"><code>impl</code></em> |
| as the key.</p> |
| <div class="refsect3"> |
| <a name="gst-meta-register.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>api</p></td> |
| <td class="parameter_description"><p>the type of the <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> API</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>impl</p></td> |
| <td class="parameter_description"><p>the name of the <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> implementation</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>size</p></td> |
| <td class="parameter_description"><p>the size of the <a class="link" href="gstreamer-GstMeta.html#GstMeta" title="struct GstMeta"><span class="type">GstMeta</span></a> structure</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>init_func</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gstreamer-GstMeta.html#GstMetaInitFunction" title="GstMetaInitFunction ()"><span class="type">GstMetaInitFunction</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>free_func</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gstreamer-GstMeta.html#GstMetaFreeFunction" title="GstMetaFreeFunction ()"><span class="type">GstMetaFreeFunction</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>transform_func</p></td> |
| <td class="parameter_description"><p> a <a class="link" href="gstreamer-GstMeta.html#GstMetaTransformFunction" title="GstMetaTransformFunction ()"><span class="type">GstMetaTransformFunction</span></a>. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="The callback is valid until first called."><span class="acronym">scope async</span></acronym>]</span></td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-meta-register.returns"></a><h4>Returns</h4> |
| <p> a <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a> that can be used to access metadata. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>]</span></p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-meta-get-info"></a><h3>gst_meta_get_info ()</h3> |
| <pre class="programlisting">const <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="returnvalue">GstMetaInfo</span></a> * |
| gst_meta_get_info (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *impl</code></em>);</pre> |
| <p>Lookup a previously registered meta info structure by its implementation name |
| <em class="parameter"><code>impl</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-meta-get-info.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>impl</p></td> |
| <td class="parameter_description"><p>the name</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-meta-get-info.returns"></a><h4>Returns</h4> |
| <p> a <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a> with <em class="parameter"><code>impl</code></em> |
| , or |
| <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a> when no such metainfo exists. </p> |
| <p><span class="annotation">[<acronym title="Don't free data after the code is done."><span class="acronym">transfer none</span></acronym>][<acronym title="NULL may be passed as the value in, out, in-out; or as a return value."><span class="acronym">nullable</span></acronym>]</span></p> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gstreamer-GstMeta.other_details"></a><h2>Types and Values</h2> |
| <div class="refsect2"> |
| <a name="GstMeta"></a><h3>struct GstMeta</h3> |
| <pre class="programlisting">struct GstMeta { |
| GstMetaFlags flags; |
| const GstMetaInfo *info; |
| }; |
| </pre> |
| <p>Base structure for metadata. Custom metadata will put this structure |
| as the first member of their structure.</p> |
| <div class="refsect3"> |
| <a name="GstMeta.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="gstreamer-GstMeta.html#GstMetaFlags" title="enum GstMetaFlags"><span class="type">GstMetaFlags</span></a> <em class="structfield"><code><a name="GstMeta.flags"></a>flags</code></em>;</p></td> |
| <td class="struct_member_description"><p>extra flags for the metadata</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p>const <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a> *<em class="structfield"><code><a name="GstMeta.info"></a>info</code></em>;</p></td> |
| <td class="struct_member_description"><p>pointer to the <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a></p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaFlags"></a><h3>enum GstMetaFlags</h3> |
| <p>Extra metadata flags.</p> |
| <div class="refsect3"> |
| <a name="GstMetaFlags.members"></a><h4>Members</h4> |
| <div class="informaltable"><table class="informaltable" width="100%" border="0"> |
| <colgroup> |
| <col width="300px" class="enum_members_name"> |
| <col class="enum_members_description"> |
| <col width="200px" class="enum_members_annotations"> |
| </colgroup> |
| <tbody> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-META-FLAG-NONE:CAPS"></a>GST_META_FLAG_NONE</p></td> |
| <td class="enum_member_description"> |
| <p>no flags</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-META-FLAG-READONLY:CAPS"></a>GST_META_FLAG_READONLY</p></td> |
| <td class="enum_member_description"> |
| <p>metadata should not be modified</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-META-FLAG-POOLED:CAPS"></a>GST_META_FLAG_POOLED</p></td> |
| <td class="enum_member_description"> |
| <p>metadata is managed by a bufferpool</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-META-FLAG-LOCKED:CAPS"></a>GST_META_FLAG_LOCKED</p></td> |
| <td class="enum_member_description"> |
| <p>metadata should not be removed</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="enum_member_name"><p><a name="GST-META-FLAG-LAST:CAPS"></a>GST_META_FLAG_LAST</p></td> |
| <td class="enum_member_description"> |
| <p>additional flags can be added starting from this flag.</p> |
| </td> |
| <td class="enum_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaInfo"></a><h3>struct GstMetaInfo</h3> |
| <pre class="programlisting">struct GstMetaInfo { |
| GType api; |
| GType type; |
| gsize size; |
| |
| GstMetaInitFunction init_func; |
| GstMetaFreeFunction free_func; |
| GstMetaTransformFunction transform_func; |
| }; |
| </pre> |
| <p>The <a class="link" href="gstreamer-GstMeta.html#GstMetaInfo" title="struct GstMetaInfo"><span class="type">GstMetaInfo</span></a> provides information about a specific metadata |
| structure.</p> |
| <div class="refsect3"> |
| <a name="GstMetaInfo.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 href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="type">GType</span></a> <em class="structfield"><code><a name="GstMetaInfo.api"></a>api</code></em>;</p></td> |
| <td class="struct_member_description"><p>tag identifying the metadata structure and api</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/gobjectgobject-Type-Information.html#GType"><span class="type">GType</span></a> <em class="structfield"><code><a name="GstMetaInfo.type"></a>type</code></em>;</p></td> |
| <td class="struct_member_description"><p>type identifying the implementor of the api</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gsize"><span class="type">gsize</span></a> <em class="structfield"><code><a name="GstMetaInfo.size"></a>size</code></em>;</p></td> |
| <td class="struct_member_description"><p>size of the metadata</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a class="link" href="gstreamer-GstMeta.html#GstMetaInitFunction" title="GstMetaInitFunction ()"><span class="type">GstMetaInitFunction</span></a> <em class="structfield"><code><a name="GstMetaInfo.init-func"></a>init_func</code></em>;</p></td> |
| <td class="struct_member_description"><p>function for initializing the metadata</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a class="link" href="gstreamer-GstMeta.html#GstMetaFreeFunction" title="GstMetaFreeFunction ()"><span class="type">GstMetaFreeFunction</span></a> <em class="structfield"><code><a name="GstMetaInfo.free-func"></a>free_func</code></em>;</p></td> |
| <td class="struct_member_description"><p>function for freeing the metadata</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a class="link" href="gstreamer-GstMeta.html#GstMetaTransformFunction" title="GstMetaTransformFunction ()"><span class="type">GstMetaTransformFunction</span></a> <em class="structfield"><code><a name="GstMetaInfo.transform-func"></a>transform_func</code></em>;</p></td> |
| <td class="struct_member_description"><p>function for transforming the metadata</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GstMetaTransformCopy"></a><h3>GstMetaTransformCopy</h3> |
| <pre class="programlisting">typedef struct { |
| gboolean region; |
| gsize offset; |
| gsize size; |
| } GstMetaTransformCopy; |
| </pre> |
| <p>Extra data passed to a "gst-copy" transform <a class="link" href="gstreamer-GstMeta.html#GstMetaTransformFunction" title="GstMetaTransformFunction ()"><span class="type">GstMetaTransformFunction</span></a>.</p> |
| <div class="refsect3"> |
| <a name="GstMetaTransformCopy.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 href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="type">gboolean</span></a> <em class="structfield"><code><a name="GstMetaTransformCopy.region"></a>region</code></em>;</p></td> |
| <td class="struct_member_description"><p><a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if only region is copied</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gsize"><span class="type">gsize</span></a> <em class="structfield"><code><a name="GstMetaTransformCopy.offset"></a>offset</code></em>;</p></td> |
| <td class="struct_member_description"><p>the offset to copy, 0 if <em class="parameter"><code>region</code></em> |
| is <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a>, otherwise > 0</p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="struct_member_name"><p><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gsize"><span class="type">gsize</span></a> <em class="structfield"><code><a name="GstMetaTransformCopy.size"></a>size</code></em>;</p></td> |
| <td class="struct_member_description"><p>the size to copy, -1 or the buffer size when <em class="parameter"><code>region</code></em> |
| is <a href="/usr/share/gtk-doc/html/glibglib-Standard-Macros.html#FALSE:CAPS"><code class="literal">FALSE</code></a></p></td> |
| <td class="struct_member_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-TAG-MEMORY:CAPS"></a><h3>GST_META_TAG_MEMORY</h3> |
| <pre class="programlisting">#define GST_META_TAG_MEMORY (_gst_meta_tag_memory) |
| </pre> |
| <div class="warning"> |
| <p><code class="literal">GST_META_TAG_MEMORY</code> is deprecated and should not be used in newly-written code.</p> |
| <p>The GQuarks are not exported by any public API, use |
| GST_META_TAG_MEMORY_STR instead.</p> |
| </div> |
| <p>Metadata tagged with this tag depends on the particular memory |
| or buffer that it is on.</p> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="GST-META-TAG-MEMORY-STR:CAPS"></a><h3>GST_META_TAG_MEMORY_STR</h3> |
| <pre class="programlisting">#define GST_META_TAG_MEMORY_STR "memory" |
| </pre> |
| <p>This metadata stays relevant as long as memory layout is unchanged.</p> |
| <p class="since">Since: <a class="link" href="ix06.html#api-index-1.2">1.2</a></p> |
| </div> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.25</div> |
| </body> |
| </html> |
