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77 lines
2.5 KiB
XML
77 lines
2.5 KiB
XML
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<chapter id="chapter-compiling">
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<title>Compiling</title>
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<para>
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This section talks about the different things you can do when building
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and shipping your applications and plugins.
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</para>
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<sect1 id="section-compiling-embedding">
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<title>Embedding static elements in your application</title>
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<para>
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The <ulink type="http"
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url="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/pwg/html/index.html">Plugin
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Writer's Guide</ulink> describes in great detail how to write elements
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for the &GStreamer; framework. In this section, we will solely discuss
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how to embed such elements statically in your application. This can be
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useful for application-specific elements that have no use elsewhere in
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&GStreamer;.
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</para>
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<para>
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Dynamically loaded plugins contain a structure that's defined using
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<function>GST_PLUGIN_DEFINE ()</function>. This structure is loaded
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when the plugin is loaded by the &GStreamer; core. The structure
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contains an initialization function (usually called
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<function>plugin_init</function>) that will be called right after that.
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It's purpose is to register the elements provided by the plugin with
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the &GStreamer; framework.
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If you want to embed elements directly in
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your application, the only thing you need to do is to replace
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<function>GST_PLUGIN_DEFINE ()</function> with a call to
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<function>gst_plugin_register_static ()</function>. As soon as you
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call <function>gst_plugin_register_static ()</function>, the elements
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will from then on be available like any other element, without them
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having to be dynamically loadable libraries. In the example below, you
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would be able to call <function>gst_element_factory_make
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("my-element-name", "some-name")</function> to create an instance of the
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element.
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</para>
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<programlisting>
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<![CDATA[
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/*
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* Here, you would write the actual plugin code.
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*/
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[..]
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static gboolean
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register_elements (GstPlugin *plugin)
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{
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return gst_element_register (plugin, "my-element-name",
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GST_RANK_NONE, MY_PLUGIN_TYPE);
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}
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static
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my_code_init (void)
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{
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...
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gst_plugin_register_static (
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GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"my-private-plugins",
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"Private elements of my application",
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register_elements,
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VERSION,
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"LGPL",
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"my-application-source",
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"my-application",
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"http://www.my-application.net/")
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...
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}
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]]>
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</programlisting>
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</sect1>
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</chapter>
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