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Code Issues Releases Activity

postproc: fix unaligned access

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QP_store is only 8-bit-aligned, so accessing it as uint32_t causes
SIGBUS crashes on sparc.
The AV_RN32/AV_WN32 macros only do unaligned access in the
HAVE_FAST_UNALIGNED case.

Reviewed-by: Michael Niedermayer <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
This commit is contained in:
Andreas Cadhalpun 2015-06-18 20:15:12 +02:00
parent d216b9debd
commit 590743101d
1 changed files with 2 additions and 1 deletions
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3
libpostproc/postprocess.c
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@ -76,6 +76,7 @@ try to unroll inner for(x=0 ... loop to avoid these damn if(x ... checks
#include "config.h" #include "config.h"
#include "libavutil/avutil.h" #include "libavutil/avutil.h"
#include "libavutil/avassert.h" #include "libavutil/avassert.h"
#include "libavutil/intreadwrite.h"
#include <inttypes.h> #include <inttypes.h>
#include <stdio.h> #include <stdio.h>
#include <stdlib.h> #include <stdlib.h>
@ -997,7 +998,7 @@ void pp_postprocess(const uint8_t * src[3], const int srcStride[3],
int i; int i;
const int count= FFMAX(mbHeight * QPStride, mbWidth); const int count= FFMAX(mbHeight * QPStride, mbWidth);
for(i=0; i<(count>>2); i++){ for(i=0; i<(count>>2); i++){
((uint32_t*)c->nonBQPTable)[i] = ((const uint32_t*)QP_store)[i] & 0x3F3F3F3F; AV_WN32(c->nonBQPTable + (i<<2), AV_RN32(QP_store + (i<<2)) & 0x3F3F3F3F);
} }
for(i<<=2; i<count; i++){ for(i<<=2; i<count; i++){
c->nonBQPTable[i] = QP_store[i] & 0x3F; c->nonBQPTable[i] = QP_store[i] & 0x3F;