- enum bt_component_class_type upstream_comp_class_type;
- struct bt_notification_iterator *iterator = NULL;
- struct bt_port *upstream_port = NULL;
- struct bt_component *upstream_component = NULL;
- struct bt_component_class *upstream_comp_class = NULL;
- struct bt_connection *connection = NULL;
- bt_component_class_notification_iterator_init_method init_method = NULL;
- static const enum bt_notification_type all_notif_types[] = {
- BT_NOTIFICATION_TYPE_ALL,
- BT_NOTIFICATION_TYPE_SENTINEL,
- };
-
- if (!private_connection) {
- BT_LOGW_STR("Invalid parameter: private connection is NULL.");
- goto error;
- }
-
- if (!notification_types) {
- BT_LOGD_STR("No notification types: subscribing to all notifications.");
- notification_types = all_notif_types;
- }
-
- connection = bt_connection_from_private(private_connection);
- if (!connection->upstream_port || !connection->downstream_port) {
- BT_LOGW("Invalid parameter: connection is ended: "
- "conn-addr=%p", connection);
- goto error;
- }
-
- upstream_port = connection->upstream_port;
- assert(upstream_port);
- upstream_component = bt_port_get_component(upstream_port);
- assert(upstream_component);
- upstream_comp_class = upstream_component->class;
- BT_LOGD("Creating notification iterator from connection: "
- "conn-addr=%p, upstream-port-addr=%p, "
- "upstream-port-name=\"%s\", upstream-comp-addr=%p, "
- "upstream-comp-name=\"%s\"",
- connection, connection->upstream_port,
- bt_port_get_name(connection->upstream_port),
- upstream_component, bt_component_get_name(upstream_component));
- upstream_comp_class_type =
- bt_component_get_class_type(upstream_component);
- if (upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_SOURCE &&
- upstream_comp_class_type != BT_COMPONENT_CLASS_TYPE_FILTER) {
- /* Unsupported operation. */
- BT_LOGW("Upstream component's class is not a source or filter component class: "
- "comp-class-type=%s",
- bt_component_class_type_string(upstream_comp_class_type));
- goto error;
- }
-
- iterator = bt_notification_iterator_create(upstream_component,
- upstream_port, notification_types, connection);
- if (!iterator) {
- BT_LOGW("Cannot create notification iterator from connection.");
- goto error;
- }
-
- switch (upstream_comp_class_type) {
- case BT_COMPONENT_CLASS_TYPE_SOURCE:
- {
- struct bt_component_class_source *source_class =
- container_of(upstream_comp_class,
- struct bt_component_class_source, parent);
- init_method = source_class->methods.iterator.init;
- break;
- }
- case BT_COMPONENT_CLASS_TYPE_FILTER:
- {
- struct bt_component_class_filter *filter_class =
- container_of(upstream_comp_class,
- struct bt_component_class_filter, parent);
- init_method = filter_class->methods.iterator.init;
- break;
- }
- default:
- /* Unreachable. */
- assert(0);
- }
-
- if (init_method) {
- enum bt_notification_iterator_status status;
-
- BT_LOGD("Calling user's initialization method: iter-addr=%p",
- iterator);
- status = init_method(
- bt_private_notification_iterator_from_notification_iterator(iterator),
- bt_private_port_from_port(upstream_port));
- BT_LOGD("User method returned: status=%s",
- bt_notification_iterator_status_string(status));
- if (status < 0) {
- BT_LOGW_STR("Initialization method failed.");
- goto error;
- }
- }
-
- g_ptr_array_add(connection->iterators, iterator);
- BT_LOGD("Created notification iterator from connection: "
- "conn-addr=%p, upstream-port-addr=%p, "
- "upstream-port-name=\"%s\", upstream-comp-addr=%p, "
- "upstream-comp-name=\"%s\", iter-addr=%p",
- connection, connection->upstream_port,
- bt_port_get_name(connection->upstream_port),
- upstream_component, bt_component_get_name(upstream_component),
- iterator);
- goto end;
-
-error:
- BT_PUT(iterator);
-
-end:
- bt_put(upstream_component);
- return iterator;