controller: Add/fix various annotations

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3194>

diff --git a/subprojects/gstreamer/libs/gst/controller/gsttimedvaluecontrolsource.c b/subprojects/gstreamer/libs/gst/controller/gsttimedvaluecontrolsource.c
index 1f9c599..080df32 100644 (file)
--- a/subprojects/gstreamer/libs/gst/controller/gsttimedvaluecontrolsource.c
+++ b/subprojects/gstreamer/libs/gst/controller/gsttimedvaluecontrolsource.c
@@ -87,7 +87,7 @@ gst_control_point_free (GstControlPoint * cp)
  *
  * Copies a #GstControlPoint
  *
- * Returns: A copy of @cp
+ * Returns: (transfer full): A copy of @cp
  */
 GstControlPoint *
 gst_control_point_copy (GstControlPoint * cp)
@@ -232,7 +232,7 @@ done:
  *
  * For use in control source implementations.
  *
- * Returns: (transfer none): the found #GSequenceIter or %NULL
+ * Returns: (transfer none) (nullable): the found #GSequenceIter or %NULL
  */
 GSequenceIter *gst_timed_value_control_source_find_control_point_iter
     (GstTimedValueControlSource * self, GstClockTime timestamp)