gst-plugin: Provide option to include plugin statically

When building with -Dbuiltin-loaders=true (default false, due to some
external components depending on it), the clapper gst plugin will be
built as static library and linked into libclapper-gtk.

Author: sp1ritCS

meson_options.txt

@@ -35,6 +35,12 @@ option('doc',
   description: 'Build documentation'
 )
 
+option('builtin-loaders',
+  type: 'boolean',
+  value: false,
+  description: 'Include the gst-plugin statically'
+)
+
 # Functionalities
 option('enhancers-loader',
   type: 'feature',

src/lib/clapper-gtk/clapper-gtk-video.c

@@ -102,6 +102,10 @@
 #include "clapper-gtk-buffering-animation-private.h"
 #include "clapper-gtk-video-placeholder-private.h"
 
+#ifdef CLAPPER_GTK_STATIC_GST_PLUGIN
+#include "gstclapperplugin.h"
+#endif
+
 #define PERCENTAGE_ROUND(a) (round ((gdouble) a / 0.01) * 0.01)
 
 #define DEFAULT_FADE_DELAY 3000
@@ -1553,6 +1557,10 @@ clapper_gtk_video_class_init (ClapperGtkVideoClass *klass)
   GObjectClass *gobject_class = (GObjectClass *) klass;
   GtkWidgetClass *widget_class = (GtkWidgetClass *) klass;
 
+#ifdef CLAPPER_GTK_STATIC_GST_PLUGIN
+  GST_PLUGIN_STATIC_REGISTER (clapper);
+#endif
+
   GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clappergtkvideo", GST_DEBUG_FG_MAGENTA,
       "Clapper GTK Video");
 

src/lib/clapper-gtk/meson.build

@@ -141,6 +141,10 @@ if get_option('default_library') == 'static'
   clappergtk_c_args += ['-DCLAPPER_GTK_STATIC_COMPILATION']
 endif
 
+if static_gst_plugin
+  clappergtk_c_args += ['-DCLAPPER_GTK_STATIC_GST_PLUGIN']
+endif
+
 clappergtk_headers_dir = join_paths(includedir, clapper_api_name, 'clapper-gtk')
 
 clappergtk_enums = gnome.mkenums_simple(
@@ -176,6 +180,7 @@ if build_gir
       clappergtk_enums,
     ],
     extra_args: [
+      gir_init_section,
       '--quiet',
       '--warn-all',
       '-DCLAPPER_GTK_COMPILATION',

src/lib/gst/plugin/gstplugin.c src/lib/gst/plugin/gstclapperplugin.csrc/lib/gst/plugin/gstplugin.c renamed to src/lib/gst/plugin/gstclapperplugin.c

@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2025 Florian "sp1rit" <[email protected]>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include <glib.h>
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+
+GST_PLUGIN_STATIC_DECLARE (clapper);
+
+G_END_DECLS

src/lib/gst/plugin/gstclapperplugin.h

@@ -26,7 +26,7 @@ gst_clapper_plugin_args = [
   '-DGST_USE_UNSTABLE_API',
 ]
 
-if get_option('default_library') == 'static'
+if static_gst_plugin
   gst_clapper_plugin_args += [
     '-DGST_STATIC_COMPILATION',
     '-DCLAPPER_GST_STATIC_COMPILATION',
@@ -73,7 +73,7 @@ gst_clapper_plugin_sources = [
   'gstclappersink.c',
   'gstclapperpaintable.c',
   'gstgtkutils.c',
-  'gstplugin.c',
+  'gstclapperplugin.c',
   'gstclappercontexthandler.c',
   'gstclapperimporter.c',
   'gstclapperimporterloader.c',
@@ -113,12 +113,13 @@ endif
 
 if build_gst_plugin
   gst_clapper_sink_dep = declare_dependency(
-    link_with: library('gstclapper',
+    link_with: build_target('gstclapper',
       gst_clapper_plugin_sources,
+      target_type: static_gst_plugin ? 'static_library' : 'shared_library',
       c_args: gst_clapper_plugin_args,
       include_directories: gst_plugin_conf_inc,
       dependencies: gst_clapper_plugin_deps + gst_clapper_plugin_private_deps,
-      install: true,
+      install: not static_gst_plugin,
       install_dir: gst_plugins_libdir,
     ),
     include_directories: gst_plugin_conf_inc,

src/lib/gst/plugin/meson.build

@@ -11,6 +11,8 @@ gir_init_section = '--add-init-section=extern void gst_init(gint*,gchar**);' + \
   'g_setenv("GST_PLUGIN_SYSTEM_PATH_1_0", "", TRUE);' + \
   'gst_init(NULL,NULL);'
 
+static_gst_plugin = get_option('builtin-loaders')
+
 subdir('gst')
 subdir('clapper')
 subdir('clapper-gtk')