virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-11-21 10:55:51 +02:00
Code Issues Releases Activity

avcodec/mathops: Set hidden visibility where advantageous

Browse Source 
It is advantageous for ff_crop_tab, as the base pointer used to
access this table is not the first element of it. But the real
base pointer is still at a constant offset from the code/the GOT
and can therefore be accessed relative to the instruction pointer
(if supported by the arch) or relative to the GOT; without this,
one has to first load address of ff_crop_tab (potentially via
the GOT) and then offset manually (which is what the earlier code
did).

Reviewed-by: Martin Storsjö <martin@martin.st>
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2022-09-02 22:54:04 +02:00
parent 6512dd6cb5
commit 0b95a6a1d0
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
libavcodec/mathops.h
View File

@ -24,6 +24,7 @@
#include <stdint.h>
#include "libavutil/attributes_internal.h"
#include "libavutil/common.h"
#include "config.h"
@ -32,7 +33,7 @@
extern const uint32_t ff_inverse[257];
extern const uint8_t ff_log2_run[41];
extern const uint8_t ff_sqrt_tab[256];
extern const uint8_t ff_crop_tab[256 + 2 * MAX_NEG_CROP];
extern const uint8_t attribute_visibility_hidden ff_crop_tab[256 + 2 * MAX_NEG_CROP];
extern const uint8_t ff_zigzag_direct[64];
extern const uint8_t ff_zigzag_scan[16+1];