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avcodec/exr: Fix undefined left shifts of negative numbers

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Affected the FATE-tests exr-rgb-scanline-pxr24-half-uint32-13x9 and
exr-rgb-scanline-pxr24-uint32.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Andreas Rheinhardt 2019-09-25 00:03:07 +02:00 • committed by Michael Niedermayer
parent 58aa0ed8f1
commit 8b0f949906
1 changed files with 1 additions and 1 deletions
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libavcodec/exr.c
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@ -881,7 +881,7 @@ static int pxr24_uncompress(EXRContext *s, const uint8_t *src,
in = ptr[3] + s->xdelta;
for (j = 0; j < s->xdelta; ++j) {
uint32_t diff = (*(ptr[0]++) << 24) |
uint32_t diff = ((uint32_t)*(ptr[0]++) << 24) |
(*(ptr[1]++) << 16) |
(*(ptr[2]++) << 8 ) |
(*(ptr[3]++));