The following commit has been merged in the experimental branch:
commit 80944df720da98d6e5ee0e355db5814735914ec9
Author: Mans Rullgard <mans at mansr.com>
Date: Mon Jan 24 23:24:28 2011 +0000
x86: fix overflow in h264 8x8 planar prediction
Signed-off-by: Mans Rullgard <mans at mansr.com>
diff --git a/libavcodec/x86/h264_intrapred.asm b/libavcodec/x86/h264_intrapred.asm
index dbe6b8a..28c2f39 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
--
Libav/FFmpeg packaging