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| author | Mans Rullgard <mans@mansr.com> | 2011-01-24 23:24:28 +0000 |
|---|---|---|
| committer | Mans Rullgard <mans@mansr.com> | 2011-01-24 23:24:28 +0000 |
| commit | 80944df720da98d6e5ee0e355db5814735914ec9 (patch) | |
| tree | 60783c9be0e8f9b83dc59f8359beaa86c51ce5c7 /libavcodec | |
| parent | e63dd5fb04ab831ca8f17fa824cfd703e317c1a1 (diff) | |
| download | ffmpeg-80944df720da98d6e5ee0e355db5814735914ec9.tar.gz | |
x86: fix overflow in h264 8x8 planar prediction
Signed-off-by: Mans Rullgard <mans@mansr.com>
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/x86/h264_intrapred.asm | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm index dbe6b8ad61..28c2f399c3 100644 --- a/libavcodec/x86/h264_intrapred.asm +++ b/libavcodec/x86/h264_intrapred.asm @@ -637,10 +637,6 @@ cglobal pred8x8_plane_%1, 2, 7, %2 %endif paddw m0, m1 ; sum of H coefficients - pmullw m0, [pw_17] - paddw m0, [pw_16] - psraw m0, 5 - lea r4, [r0+r2*4-1] lea r3, [r0 -1] add r4, r2 @@ -694,6 +690,10 @@ cglobal pred8x8_plane_%1, 2, 7, %2 shl r3, 4 movd r1d, m0 movsx r1d, r1w + imul r1d, 17 + add r1d, 16 + sar r1d, 5 + movd m0, r1d add r1d, r5d sub r3d, r1d add r1d, r1d |