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

It is undefined to left-shift a negative value.
3 years ago · c02dd59cd3
parent aa1babc59a
commit c02dd59cd3
1 changed files with 1 additions and 1 deletions
--- a/libavcodec/dovi_rpu.c
+++ b/libavcodec/dovi_rpu.c
@ -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);