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avcodec/mpegaudiodec_template: make shift unsigned to avoid undefined behavior

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-05-09 12:45:17 +02:00
parent 341cacb9ac
commit 0be95996d0
1 changed files with 1 additions and 1 deletions
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libavcodec/mpegaudiodec_template.c
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@ -216,7 +216,7 @@ static inline int l1_unscale(int n, int mant, int scale_factor)
shift = scale_factor_modshift[scale_factor];
mod = shift & 3;
shift >>= 2;
val = MUL64(mant + (-1 << n) + 1, scale_factor_mult[n-1][mod]);
val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod]);
shift += n;
/* NOTE: at this point, 1 <= shift >= 21 + 15 */
return (int)((val + (1LL << (shift - 1))) >> shift);