gst-full: register full features in a plugin

To offer the possibility to get information at plugin
level and get it from the registry, all the
full features are now registered in 'fullstaticfeatures'
meta plugin instead of NULL plugin.
In the case of gst-inspect, the features were not displayed
at plugin level because it was a NULL plugin.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5421>

meson.build

@@ -342,8 +342,10 @@ if building_full
   cdata = configuration_data()
   cdata.set_quoted('GST_API_VERSION', apiversion)
   cdata.set_quoted('GETTEXT_PACKAGE', 'gstreamer-full-1.0')
-  cdata.set_quoted('PACKAGE_VERSION', gst_version)
+  cdata.set_quoted('PACKAGE_VERSION', meson.project_version())
   cdata.set_quoted('GST_PACKAGE_ORIGIN', get_option('package-origin'))
+  cdata.set_quoted('GST_FULL_LICENSE', get_option('gstreamer-full-license'))
+  cdata.set_quoted('GST_PLUGIN_FULL_FEATURES_NAME', 'fullstaticfeatures')
   configure_file(output : 'config.h', configuration : cdata)
   configinc = include_directories('.')
   gst_c_args = ['-DHAVE_CONFIG_H']
@@ -441,7 +443,7 @@ if building_full
   # Build shared library
   gstfull = build_target('gstreamer-full-1.0',
     init_static_plugins_c,
-    c_args: ['-DBUILDING_GST'],
+    c_args: ['-DBUILDING_GST'] + gst_c_args,
     target_type: get_option('gst-full-target-type'),
     link_args: gstfull_link_args,
     link_whole : exposed_libs,

meson_options.txt

@@ -70,3 +70,5 @@ option('glib-checks', type : 'feature', value : 'enabled', yield : true,
 
 option('package-name', type : 'string', yield : true,
        description : 'package name to use in plugins')
+option('gstreamer-full-license', type : 'string', value : 'unknown',
+       description : 'gstreamer-full license (default unknown)')

scripts/generate_init_static_plugins.py

@@ -6,6 +6,9 @@ from string import Template
 
 TEMPLATE = Template('''
 #include <gst/gst.h>
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 $elements_declaration
 $typefind_funcs_declaration
@@ -14,16 +17,28 @@ $dynamic_types_declaration
 $plugins_declaration
 $giomodules_declaration
 
+ static
+gboolean register_features_full (GstPlugin* plugin)
+{
+    $elements_registration
+    $typefind_funcs_registration
+    $device_providers_registration
+    $dynamic_types_registration
+
+    return TRUE;
+}
+
 _GST_EXPORT
 void
 gst_init_static_plugins (void)
 {
   static gsize initialization_value = 0;
   if (g_once_init_enter (&initialization_value)) {
-    $elements_registration
-    $typefind_funcs_registration
-    $device_providers_registration
-    $dynamic_types_registration
+
+    gst_plugin_register_static (GST_VERSION_MAJOR, GST_VERSION_MINOR,
+        GST_PLUGIN_FULL_FEATURES_NAME, "features linked into the gstreamer-full library", register_features_full, PACKAGE_VERSION, GST_FULL_LICENSE,
+        "gstreamer-full", GETTEXT_PACKAGE, GST_PACKAGE_ORIGIN);
+
     $plugins_registration
     $giomodules_registration
 
@@ -57,7 +72,7 @@ def process_features(features_list, plugins, feature_prefix):
                 for feature in features:
                     feature = feature.replace("-", "_")
                     feature_declaration += ['%s_REGISTER_DECLARE(%s);' % (feature_prefix, feature)]
-                    feature_registration += ['%s_REGISTER(%s, NULL);' % (feature_prefix, feature)]
+                    feature_registration += ['%s_REGISTER(%s, plugin);' % (feature_prefix, feature)]
     return (plugins_list, feature_declaration, feature_registration)
 
 

tests/static-plugins/meson.build

@@ -1,8 +1,8 @@
 
 dep = dependency('gstreamer-full-1.0', required: get_option('default_library') == 'static')
 if dep.found()
-	test_gst_full_features = executable('test-gst-full-features', 'test-gst-full-features.c', dependencies : gst_full_dep)
+	test_gst_full_features = executable('test-gst-full-features', 'test-gst-full-features.c', dependencies : gst_full_dep, c_args: ['-DHAVE_CONFIG_H'])
 	test('test-gst-full-features', test_gst_full_features)
-	test_gst_full = executable('test-gst-full', 'test-gst-full.c', dependencies : gst_full_dep)
+	test_gst_full = executable('test-gst-full', 'test-gst-full.c', dependencies : gst_full_dep, c_args: ['-DHAVE_CONFIG_H'])
 	test('test-gst-full', test_gst_full)
 endif

tests/static-plugins/test-gst-full-features.c

@@ -1,4 +1,7 @@
 #include <gst/gst.h>
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
 
 
 void
@@ -14,10 +17,14 @@ assert_feature_names (gchar * names, GType feature_type, gboolean spook)
     for (i = 0; split[i]; i++) {
       feature = gst_registry_find_feature (gst_registry_get (),
           split[i], feature_type);
-      if (spook)
+      if (spook) {
         g_assert_null (feature);
-      else
+      } else {
         g_assert_nonnull (feature);
+        g_assert_cmpstr (gst_plugin_feature_get_plugin_name (feature), ==,
+            GST_PLUGIN_FULL_FEATURES_NAME);
+      }
+
       if (feature)
         gst_object_unref (feature);
     }