1 files changed, 6 insertions, 0 deletions
diff --git a/libavutil/common.h b/libavutil/common.h
index 954cb5c06e..89f8a01f52 100644
--- a/libavutil/common.h
+++ b/libavutil/common.h
@@ -337,6 +337,12 @@ tend= read_time();\
  * CPU). av_malloc(0) must return a non NULL pointer.
  */
 void *av_malloc(unsigned int size);
+
+/**
+ * av_realloc semantics (same as glibc): if ptr is NULL and size > 0,
+ * identical to malloc(size). If size is zero, it is identical to
+ * free(ptr) and NULL is returned.
+ */
 void *av_realloc(void *ptr, unsigned int size);
 void av_free(void *ptr);