[FFmpeg-cvslog] avcodec/me_cmp: Mark ff_square_tab as hidden

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Thu Oct  6 00:53:01 2022 +0200| [b9133bce0447bee9f5b4052c1467eb6908214acb] | committer: Andreas Rheinhardt

avcodec/me_cmp: Mark ff_square_tab as hidden

ff_square_tab is always used with an offset; if this table
is marked as hidden, the compiler can infer that it and
therefore also ff_square_tab + 256 have a fixed offset
from the code. This allows to avoid performing "+ 256"
at runtime by baking it into the offset from the code to
the table.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b9133bce0447bee9f5b4052c1467eb6908214acb
---

 libavcodec/me_cmp.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libavcodec/me_cmp.h b/libavcodec/me_cmp.h
index c6de2d0061..90ea76c891 100644
--- a/libavcodec/me_cmp.h
+++ b/libavcodec/me_cmp.h
@@ -21,9 +21,11 @@
 
 #include <stdint.h>
 
+#include "libavutil/attributes_internal.h"
+
 #include "avcodec.h"
 
-extern const uint32_t ff_square_tab[512];
+extern const uint32_t attribute_visibility_hidden ff_square_tab[512];
 
 
 /* minimum alignment rules ;)