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lavc/dovi_rpu: Fix UB for possible left shift of negative values

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It is undefined to left-shift a negative value.
This commit is contained in:
Michael Goulet
2022-06-16 13:17:25 +02:00
committed by Thilo Borgmann
parent aa1babc59a
commit c02dd59cd3
1 changed files with 1 additions and 1 deletions
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libavcodec/dovi_rpu.c
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@@ -172,7 +172,7 @@ static inline int64_t get_se_coef(GetBitContext *gb, const AVDOVIRpuDataHeader *
case RPU_COEFF_FIXED:
ipart = get_se_golomb_long(gb);
fpart.u32 = get_bits_long(gb, hdr->coef_log2_denom);
return (ipart << hdr->coef_log2_denom) + fpart.u32;
return ipart * (1LL << hdr->coef_log2_denom) + fpart.u32;
case RPU_COEFF_FLOAT:
fpart.u32 = get_bits_long(gb, 32);