frame: allow align=0 (meaning automatic) for av_frame_get_buffer()

This will avoid every caller from hardcoding some specific alignment,
which may break in the future with new instruction sets.

1 files changed, 3 insertions, 1 deletions

diff --git a/libavutil/frame.h b/libavutil/frame.h
index c718f7bd62..4f63fb0249 100644
--- a/libavutil/frame.h
+++ b/libavutil/frame.h
@@ -475,7 +475,9 @@ void av_frame_move_ref(AVFrame *dst, AVFrame *src);
  *           cases.
  *
  * @param frame frame in which to store the new buffers.
- * @param align required buffer size alignment
+ * @param align Required buffer size alignment. If equal to 0, alignment will be
+ *              chosen automatically for the current CPU. It is highly
+ *              recommended to pass 0 here unless you know what you are doing.
  *
  * @return 0 on success, a negative AVERROR on error.
  */