RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

lavfi/gradfun: fix rounding in MMX code. 

Current code divide before increasing precision.
This commit is contained in:
Clément Bœsch 2012-12-07 00:36:29 +01:00
parent dd8a76ab08
commit 49de902a1e
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
libavfilter/x86/gradfun.c
View File

@ -62,8 +62,8 @@ static void gradfun_filter_line_mmxext(uint8_t *dst, const uint8_t *src, const u
"pminsw %%mm7, %%mm2 \n" // m = -max(0, 127-m) "pminsw %%mm7, %%mm2 \n" // m = -max(0, 127-m)
"pmullw %%mm2, %%mm2 \n" "pmullw %%mm2, %%mm2 \n"
"paddw %%mm4, %%mm0 \n" // pix += dither "paddw %%mm4, %%mm0 \n" // pix += dither
"pmulhw %%mm2, %%mm1 \n"
"psllw $2, %%mm1 \n" // m = m*m*delta >> 14 "psllw $2, %%mm1 \n" // m = m*m*delta >> 14
"pmulhw %%mm2, %%mm1 \n"
"paddw %%mm1, %%mm0 \n" // pix += m "paddw %%mm1, %%mm0 \n" // pix += m
"psraw $7, %%mm0 \n" "psraw $7, %%mm0 \n"
"packuswb %%mm0, %%mm0 \n" "packuswb %%mm0, %%mm0 \n"