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avcodec/h2645_parse: Replace RNXYA by RNXY in ff_h2645_extract_rbsp()

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Fixes misaligned accesses
Found-by: Matt Wolenetz <wolenetz@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-03-10 21:32:51 +01:00
parent 0bd0401336
commit 7562567f41
1 changed files with 4 additions and 4 deletions
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8
libavcodec/h2645_parse.c
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@ -53,8 +53,8 @@ int ff_h2645_extract_rbsp(const uint8_t *src, int length,
i++
#if HAVE_FAST_64BIT
for (i = 0; i + 1 < length; i += 9) {
if (!((~AV_RN64A(src + i) &
(AV_RN64A(src + i) - 0x0100010001000101ULL)) &
if (!((~AV_RN64(src + i) &
(AV_RN64(src + i) - 0x0100010001000101ULL)) &
0x8000800080008080ULL))
continue;
FIND_FIRST_ZERO;
@ -63,8 +63,8 @@ int ff_h2645_extract_rbsp(const uint8_t *src, int length,
}
#else
for (i = 0; i + 1 < length; i += 5) {
if (!((~AV_RN32A(src + i) &
(AV_RN32A(src + i) - 0x01000101U)) &
if (!((~AV_RN32(src + i) &
(AV_RN32(src + i) - 0x01000101U)) &
0x80008080U))
continue;
FIND_FIRST_ZERO;