(API Change) libobs: Make obs_service refcounted

libobs/obs-service.c

@@ -60,6 +60,9 @@ obs_service_t *obs_service_create(const char *id, const char *name,
 		return NULL;
 	}
 
+	service->control = bzalloc(sizeof(obs_weak_service_t));
+	service->control->service = service;
+
 	obs_context_data_insert(&service->context,
 			&obs->data.services_mutex,
 			&obs->data.first_service);
@@ -247,3 +250,78 @@ void obs_service_apply_encoder_settings(obs_service_t *service,
 		service->info.apply_encoder_settings(service->context.data,
 				video_encoder_settings, audio_encoder_settings);
 }
+
+void obs_service_addref(obs_service_t *service)
+{
+	if (!service)
+		return;
+
+	obs_ref_addref(&service->control->ref);
+}
+
+void obs_service_release(obs_service_t *service)
+{
+	if (!service)
+		return;
+
+	obs_weak_service_t *control = service->control;
+	if (obs_ref_release(&control->ref)) {
+		// The order of operations is important here since
+		// get_context_by_name in obs.c relies on weak refs
+		// being alive while the context is listed
+		obs_service_destroy(service);
+		obs_weak_service_release(control);
+	}
+}
+
+void obs_weak_service_addref(obs_weak_service_t *weak)
+{
+	if (!weak)
+		return;
+
+	obs_weak_ref_addref(&weak->ref);
+}
+
+void obs_weak_service_release(obs_weak_service_t *weak)
+{
+	if (!weak)
+		return;
+
+	if (obs_weak_ref_release(&weak->ref))
+		bfree(weak);
+}
+
+obs_service_t *obs_service_get_ref(obs_service_t *service)
+{
+	if (!service)
+		return NULL;
+
+	return obs_weak_service_get_service(service->control);
+}
+
+obs_weak_service_t *obs_service_get_weak_service(obs_service_t *service)
+{
+	if (!service)
+		return NULL;
+
+	obs_weak_service_t *weak = service->control;
+	obs_weak_service_addref(weak);
+	return weak;
+}
+
+obs_service_t *obs_weak_service_get_service(obs_weak_service_t *weak)
+{
+	if (!weak)
+		return NULL;
+
+	if (obs_weak_ref_get_ref(&weak->ref))
+		return weak->service;
+
+	return NULL;
+}
+
+bool obs_weak_service_references_service(obs_weak_service_t *weak,
+		obs_service_t *service)
+{
+	return weak && service && weak->service == service;
+}