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avcodec/aacdec_template: Avoid undefined negation in imdct_and_windowing_eld() 

Fixes: negation of -2147483648 cannot be represented in type 'INTFLOAT' (aka 'int'); cast to an unsigned type to negate this value to itself
Fixes: 29057/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_AAC_FIXED_fuzzer-5642758933053440

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 633924539a)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-01-20 23:56:43 +01:00
parent 27406e2286
commit 47edf812a8
1 changed files with 1 additions and 1 deletions
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libavcodec/aacdec_template.c
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@ -2807,7 +2807,7 @@ static void imdct_and_windowing_ld(AACContext *ac, SingleChannelElement *sce)
static void imdct_and_windowing_eld(AACContext *ac, SingleChannelElement *sce)
{
INTFLOAT *in = sce->coeffs;
UINTFLOAT *in = sce->coeffs;
INTFLOAT *out = sce->ret;
INTFLOAT *saved = sce->saved;
INTFLOAT *buf = ac->buf_mdct;