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

huffyuvdec: swap code blocks

Browse Source 
The effect is not really deterministic, as it seems to be a combination
on x86_64 of fewer registers used, different jump offsets and, for all
archs, of likely branches.

Speedup is around 15%.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Christophe Gisquet 2014-06-15 12:07:16 +02:00 committed by Michael Niedermayer
parent 083cd3d1f7
commit 9dc1791977
1 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
libavcodec/huffyuvdec.c
View File

@ -591,17 +591,17 @@ static av_cold int decode_init_thread_copy(AVCodecContext *avctx)
unsigned int index = SHOW_UBITS(name, gb, bits); \
int code, n = dtable[index][1]; \
\
if (n>0) { \
code = dtable[index][0]; \
OP(dst0, dst1, code); \
LAST_SKIP_BITS(name, gb, n); \
} else { \
if (n<=0) { \
int nb_bits; \
VLC_INTERN(dst0, table1, gb, name, bits, max_depth); \
\
UPDATE_CACHE(re, gb); \
index = SHOW_UBITS(name, gb, bits); \
VLC_INTERN(dst1, table2, gb, name, bits, max_depth); \
} else { \
code = dtable[index][0]; \
OP(dst0, dst1, code); \
LAST_SKIP_BITS(name, gb, n); \
} \
} while (0)