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| <a href="#gst-plugins-base-libs-gstpbutilsdescriptions.description" class="shortcut">Description</a></span> |
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| <div class="refentry"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions"></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-gstpbutilsdescriptions.top_of_page"></a>gstpbutilsdescriptions</span></h2> |
| <p>gstpbutilsdescriptions — Provides human-readable descriptions for caps/codecs |
| and encoder, decoder, URI source and URI sink elements</p> |
| </td> |
| <td class="gallery_image" valign="top" align="right"></td> |
| </tr></table></div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions.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/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-source-description" title="gst_pb_utils_get_source_description ()">gst_pb_utils_get_source_description</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-sink-description" title="gst_pb_utils_get_sink_description ()">gst_pb_utils_get_sink_description</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-decoder-description" title="gst_pb_utils_get_decoder_description ()">gst_pb_utils_get_decoder_description</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-encoder-description" title="gst_pb_utils_get_encoder_description ()">gst_pb_utils_get_encoder_description</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-element-description" title="gst_pb_utils_get_element_description ()">gst_pb_utils_get_element_description</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="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-add-codec-description-to-tag-list" title="gst_pb_utils_add_codec_description_to_tag_list ()">gst_pb_utils_add_codec_description_to_tag_list</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| <tr> |
| <td class="function_type"> |
| <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| </td> |
| <td class="function_name"> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-get-codec-description" title="gst_pb_utils_get_codec_description ()">gst_pb_utils_get_codec_description</a> <span class="c_punctuation">()</span> |
| </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions.includes"></a><h2>Includes</h2> |
| <pre class="synopsis">#include <gst/pbutils/descriptions.h> |
| </pre> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions.description"></a><h2>Description</h2> |
| <div class="refsect2"> |
| <a name="id-1.2.14.6.5.2"></a><p> |
| The above functions provide human-readable strings for media formats |
| and decoder/demuxer/depayloader/encoder/muxer/payloader elements for use |
| in error dialogs or other messages shown to users. |
| </p> |
| <p> |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-add-codec-description-to-tag-list" title="gst_pb_utils_add_codec_description_to_tag_list ()"><code class="function">gst_pb_utils_add_codec_description_to_tag_list()</code></a> is a utility function |
| for demuxer and decoder elements to add audio/video codec tags from a |
| given (fixed) <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a>. |
| </p> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions.functions_details"></a><h2>Functions</h2> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-source-description"></a><h3>gst_pb_utils_get_source_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_source_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *protocol</code></em>);</pre> |
| <p>Returns a localised string describing a source element handling the protocol |
| specified in <em class="parameter"><code>protocol</code></em> |
| , for use in error dialogs or other messages to be |
| seen by the user. Should never return NULL unless <em class="parameter"><code>protocol</code></em> |
| is invalid.</p> |
| <p>This function is mainly for internal use, applications would typically |
| use <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-description" title="gst_missing_plugin_message_get_description ()"><code class="function">gst_missing_plugin_message_get_description()</code></a> to get a description of |
| a missing feature from a missing-plugin message.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-source-description.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>protocol</p></td> |
| <td class="parameter_description"><p>the protocol the source element needs to handle, e.g. "http"</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-source-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-sink-description"></a><h3>gst_pb_utils_get_sink_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_sink_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *protocol</code></em>);</pre> |
| <p>Returns a localised string describing a sink element handling the protocol |
| specified in <em class="parameter"><code>protocol</code></em> |
| , for use in error dialogs or other messages to be |
| seen by the user. Should never return NULL unless <em class="parameter"><code>protocol</code></em> |
| is invalid.</p> |
| <p>This function is mainly for internal use, applications would typically |
| use <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-description" title="gst_missing_plugin_message_get_description ()"><code class="function">gst_missing_plugin_message_get_description()</code></a> to get a description of |
| a missing feature from a missing-plugin message.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-sink-description.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>protocol</p></td> |
| <td class="parameter_description"><p>the protocol the sink element needs to handle, e.g. "http"</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-sink-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-decoder-description"></a><h3>gst_pb_utils_get_decoder_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_decoder_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> *caps</code></em>);</pre> |
| <p>Returns a localised string describing an decoder for the format specified |
| in <em class="parameter"><code>caps</code></em> |
| , for use in error dialogs or other messages to be seen by the user. |
| Should never return NULL unless <em class="parameter"><code>factory_name</code></em> |
| or <em class="parameter"><code>caps</code></em> |
| are invalid.</p> |
| <p>This function is mainly for internal use, applications would typically |
| use <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-description" title="gst_missing_plugin_message_get_description ()"><code class="function">gst_missing_plugin_message_get_description()</code></a> to get a description of |
| a missing feature from a missing-plugin message.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-decoder-description.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>caps</p></td> |
| <td class="parameter_description"><p>the (fixed) <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> for which an decoder description is needed</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-decoder-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-encoder-description"></a><h3>gst_pb_utils_get_encoder_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_encoder_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> *caps</code></em>);</pre> |
| <p>Returns a localised string describing an encoder for the format specified |
| in <em class="parameter"><code>caps</code></em> |
| , for use in error dialogs or other messages to be seen by the user. |
| Should never return NULL unless <em class="parameter"><code>factory_name</code></em> |
| or <em class="parameter"><code>caps</code></em> |
| are invalid.</p> |
| <p>This function is mainly for internal use, applications would typically |
| use <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-description" title="gst_missing_plugin_message_get_description ()"><code class="function">gst_missing_plugin_message_get_description()</code></a> to get a description of |
| a missing feature from a missing-plugin message.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-encoder-description.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>caps</p></td> |
| <td class="parameter_description"><p>the (fixed) <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> for which an encoder description is needed</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-encoder-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-element-description"></a><h3>gst_pb_utils_get_element_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_element_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="type">gchar</span></a> *factory_name</code></em>);</pre> |
| <p>Returns a localised string describing the given element, for use in |
| error dialogs or other messages to be seen by the user. Should never |
| return NULL unless <em class="parameter"><code>factory_name</code></em> |
| is invalid.</p> |
| <p>This function is mainly for internal use, applications would typically |
| use <a class="link" href="gst-plugins-base-libs-gstpbutilsmissingplugins.html#gst-missing-plugin-message-get-description" title="gst_missing_plugin_message_get_description ()"><code class="function">gst_missing_plugin_message_get_description()</code></a> to get a description of |
| a missing feature from a missing-plugin message.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-element-description.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>factory_name</p></td> |
| <td class="parameter_description"><p>the name of the element, e.g. "giosrc"</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-element-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-add-codec-description-to-tag-list"></a><h3>gst_pb_utils_add_codec_description_to_tag_list ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gboolean"><span class="returnvalue">gboolean</span></a> |
| gst_pb_utils_add_codec_description_to_tag_list |
| (<em class="parameter"><code><a href="/usr/share/gtk-doc/html/gstreamer-1.0GstTagList.html#GstTagList-struct"><span class="type">GstTagList</span></a> *taglist</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> *codec_tag</code></em>, |
| <em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> *caps</code></em>);</pre> |
| <p>Adds a codec tag describing the format specified by <em class="parameter"><code>caps</code></em> |
| to <em class="parameter"><code>taglist</code></em> |
| .</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-add-codec-description-to-tag-list.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>taglist</p></td> |
| <td class="parameter_description"><p>a <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstTagList.html#GstTagList-struct"><span class="type">GstTagList</span></a></p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>codec_tag</p></td> |
| <td class="parameter_description"><p> a GStreamer codec tag such as <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstTagList.html#GST-TAG-AUDIO-CODEC:CAPS"><span class="type">GST_TAG_AUDIO_CODEC</span></a>, |
| <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstTagList.html#GST-TAG-VIDEO-CODEC:CAPS"><span class="type">GST_TAG_VIDEO_CODEC</span></a> or <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstTagList.html#GST-TAG-CODEC:CAPS"><span class="type">GST_TAG_CODEC</span></a>. If none is specified, |
| the function will attempt to detect the appropriate category. </p></td> |
| <td class="parameter_annotations"><span class="annotation">[<acronym title="NULL is OK, both for passing and for returning."><span class="acronym">allow-none</span></acronym>]</span></td> |
| </tr> |
| <tr> |
| <td class="parameter_name"><p>caps</p></td> |
| <td class="parameter_description"><p>the (fixed) <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> for which a codec tag should be added.</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr> |
| </tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-add-codec-description-to-tag-list.returns"></a><h4>Returns</h4> |
| <p> TRUE if a codec tag was added, FALSE otherwise.</p> |
| </div> |
| </div> |
| <hr> |
| <div class="refsect2"> |
| <a name="gst-pb-utils-get-codec-description"></a><h3>gst_pb_utils_get_codec_description ()</h3> |
| <pre class="programlisting"><a href="/usr/share/gtk-doc/html/glibglib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> * |
| gst_pb_utils_get_codec_description (<em class="parameter"><code>const <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> *caps</code></em>);</pre> |
| <p>Returns a localised (as far as this is possible) string describing the |
| media format specified in <em class="parameter"><code>caps</code></em> |
| , for use in error dialogs or other messages |
| to be seen by the user. Should never return NULL unless <em class="parameter"><code>caps</code></em> |
| is invalid.</p> |
| <p>Also see the convenience function |
| <a class="link" href="gst-plugins-base-libs-gstpbutilsdescriptions.html#gst-pb-utils-add-codec-description-to-tag-list" title="gst_pb_utils_add_codec_description_to_tag_list ()"><code class="function">gst_pb_utils_add_codec_description_to_tag_list()</code></a>.</p> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-codec-description.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>caps</p></td> |
| <td class="parameter_description"><p>the (fixed) <a href="/usr/share/gtk-doc/html/gstreamer-1.0GstCaps.html#GstCaps-struct"><span class="type">GstCaps</span></a> for which an format description is needed</p></td> |
| <td class="parameter_annotations"> </td> |
| </tr></tbody> |
| </table></div> |
| </div> |
| <div class="refsect3"> |
| <a name="gst-pb-utils-get-codec-description.returns"></a><h4>Returns</h4> |
| <p> a newly-allocated description string, or NULL on error. Free |
| string with <a href="/usr/share/gtk-doc/html/glibglib-Memory-Allocation.html#g-free"><code class="function">g_free()</code></a> when not needed any longer.</p> |
| </div> |
| </div> |
| </div> |
| <div class="refsect1"> |
| <a name="gst-plugins-base-libs-gstpbutilsdescriptions.other_details"></a><h2>Types and Values</h2> |
| </div> |
| </div> |
| <div class="footer"> |
| <hr>Generated by GTK-Doc V1.25</div> |
| </body> |
| </html> |
