gst: Mark caps parameters in ALLOCATION query API as nullable

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3752>

diff --git a/subprojects/gstreamer/gst/gstquery.c b/subprojects/gstreamer/gst/gstquery.c
index 1c6da5d..106c450 100644 (file)
--- a/subprojects/gstreamer/gst/gstquery.c
+++ b/subprojects/gstreamer/gst/gstquery.c
@@ -1530,7 +1530,7 @@ gst_query_parse_uri_redirection_permanent (GstQuery * query,
 
 /**
  * gst_query_new_allocation:
- * @caps: the negotiated caps
+ * @caps: (nullable): the negotiated caps
  * @need_pool: return a pool
  *
  * Constructs a new query object for querying the allocation properties.
@@ -1557,7 +1557,7 @@ gst_query_new_allocation (GstCaps * caps, gboolean need_pool)
 /**
  * gst_query_parse_allocation:
  * @query: a #GstQuery
- * @caps: (out) (transfer none) (optional): The #GstCaps
+ * @caps: (out) (transfer none) (optional) (nullable): The #GstCaps
  * @need_pool: (out) (optional): Whether a #GstBufferPool is needed
  *
  * Parse an allocation query, writing the requested caps in @caps and