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385b9ee5c4
Original commit message from CVS: merge in tagging Includes: - gsttag.[ch] - The definition of GstTagList and tag registering/querying - gsttaginterface.[ch] - Interface for elements that can handle setting of tags - updates and merges to gststructure.[ch] and gstvalue.[ch] - testsuite/tags - some tests for tagging - bugfixes - updates to make make distcheck work - updates the version number to 0.7.2.1 Does not include: - including tagging stuff in docs - extensive tests
117 lines
2.3 KiB
Plaintext
117 lines
2.3 KiB
Plaintext
<!-- ##### SECTION Title ##### -->
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GstElementFactory
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<!-- ##### SECTION Short_Description ##### -->
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Create GstElements from a factory
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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GstElementFactory is used to create instances of elements. A GstElementfactory
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can be added to a #GstPlugin as it is also a #GstPluginFeature.
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</para>
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<para>
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Use gst_element_factory_new() to create a new factory which can be added to a plugin
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with gst_plugin_add_feature().
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</para>
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<para>
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gst_element_factory_add_pad_template() is used to add a padtemplate to the factory.
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This function will enable the application to query for elementfactories that handle
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a specific media type.
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</para>
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<para>
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Use the gst_element_factory_find() and gst_element_factory_create() functions
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to create element instances or use gst_element_factory_make() as a convenient
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shortcut.
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</para>
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<para>
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The following code example shows you how to create a GstFileSrc element.
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</para>
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<para>
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<programlisting role="C">
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#include <gst/gst.h>
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GstElement *src;
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GstElementFactory *srcfactory;
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gst_init(&argc,&argv);
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srcfactory = gst_element_factory_find("filesrc");
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g_return_if_fail(srcfactory != NULL);
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src = gst_element_factory_create(srcfactory,"src");
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g_return_if_fail(src != NULL);
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...
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</programlisting>
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</para>
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<para>
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An elementfactory can be assigned a rank with gst_element_factory_set_rank()
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so that the autopluggers can select a plugin more appropriatly
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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#GstElement, #GstPlugin, #GstPluginFeature, #GstPadTemplate.
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</para>
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<!-- ##### STRUCT GstElementDetails ##### -->
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<para>
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This struct is used to define public information about the element. It
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describes the element, mostly for the benefit of editors.
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</para>
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@longname:
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@klass:
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@description:
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@author:
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<!-- ##### FUNCTION gst_element_factory_find ##### -->
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<para>
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</para>
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@name:
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@Returns:
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<!-- ##### FUNCTION gst_element_factory_can_src_caps ##### -->
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<para>
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</para>
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@factory:
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@caps:
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@Returns:
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<!-- ##### FUNCTION gst_element_factory_can_sink_caps ##### -->
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<para>
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</para>
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@factory:
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@caps:
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@Returns:
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<!-- ##### FUNCTION gst_element_factory_create ##### -->
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<para>
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</para>
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@factory:
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@name:
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@Returns:
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<!-- ##### FUNCTION gst_element_factory_make ##### -->
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<para>
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</para>
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@factoryname:
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@name:
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@Returns:
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