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debug: Instantiate GType when dumping debug categories.

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A lot of debug categories are declared in element class_init
functions, which don't get run until the element is first created
(not just registered in the plugin load function). This means
that --gst-debug-help doesn't print out a lot of categories.

Creating an instance of each element from the element factory
makes them visible, at some extra cost - 2-3 times longer, which can
be a full second or two of extra waiting. Yikes!

https://bugzilla.gnome.org/show_bug.cgi?id=741001
This commit is contained in:
Jan Schmidt 2016-04-02 01:05:39 +11:00
parent 5e43ee5989
commit fe3180dcca
1 changed files with 33 additions and 0 deletions
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33
gst/gst.c
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@ -763,8 +763,41 @@ gst_debug_help (void)
/* FIXME this is gross. why don't debug have categories PluginFeatures? */
for (g = list2; g; g = g_list_next (g)) {
GstPlugin *plugin = GST_PLUGIN_CAST (g->data);
GList *features, *orig_features;
if (GST_OBJECT_FLAG_IS_SET (plugin, GST_PLUGIN_FLAG_BLACKLISTED))
continue;
gst_plugin_load (plugin);
/* Now create one of each feature so the class_init functions
* are called, as that's where most debug categories are
* registered. FIXME: If debug categories were a plugin feature,
* this would be unneeded */
orig_features = features =
gst_registry_get_feature_list_by_plugin (gst_registry_get (),
gst_plugin_get_name (plugin));
while (features) {
GstPluginFeature *feature;
if (G_UNLIKELY (features->data == NULL))
goto next;
feature = GST_PLUGIN_FEATURE (features->data);
if (GST_IS_ELEMENT_FACTORY (feature)) {
GstElementFactory *factory;
GstElement *e;
factory = GST_ELEMENT_FACTORY (feature);
e = gst_element_factory_create (factory, NULL);
if (e)
gst_object_unref (e);
}
next:
features = g_list_next (features);
}
gst_plugin_feature_list_free (orig_features);
}
g_list_free (list2);