aom_image.h: add lifetime note for img_data
The wrapped storage must exist for the duration of the aom_image_t
allocation.
Bug: aomedia:363806063
Change-Id: Ic6b79a56b6c07776222d1767490d873d7408ced0
diff --git a/aom/aom_image.h b/aom/aom_image.h
index 1b790d5..248b5b6 100644
--- a/aom/aom_image.h
+++ b/aom/aom_image.h
@@ -278,7 +278,9 @@
* (2^27).
* \param[in] align Alignment, in bytes, of each row in the image
* (stride). Must not exceed 65536.
- * \param[in] img_data Storage to use for the image
+ * \param[in] img_data Storage to use for the image. The storage must
+ * outlive the returned image descriptor; it can be
+ * disposed of after calling aom_img_free().
*
* \return Returns a pointer to the initialized image descriptor. If the img
* parameter is non-null, the value of the img parameter will be
