libobs: Add obs_scene_get_ref()

libobs/obs-scene.c

@@ -1649,6 +1649,15 @@ void obs_scene_addref(obs_scene_t *scene)
 		obs_source_addref(scene->source);
 }
 
+obs_scene_t *obs_scene_get_ref(obs_scene_t *scene)
+{
+	if (!scene)
+		return NULL;
+	if (obs_source_get_ref(scene->source) != NULL)
+		return scene;
+	return NULL;
+}
+
 void obs_scene_release(obs_scene_t *scene)
 {
 	if (scene)

libobs/obs.h

@@ -1593,6 +1593,8 @@ EXPORT obs_scene_t *obs_scene_duplicate(obs_scene_t *scene, const char *name,
 EXPORT void obs_scene_addref(obs_scene_t *scene);
 EXPORT void obs_scene_release(obs_scene_t *scene);
 
+EXPORT obs_scene_t *obs_scene_get_ref(obs_scene_t *scene);
+
 /** Gets the scene's source context */
 EXPORT obs_source_t *obs_scene_get_source(const obs_scene_t *scene);