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avcodec/g729postfilter: avoid potential negative shift

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Fixes CID1194402

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2014-04-27 23:12:42 +02:00
parent d03defa778
commit 1fc28cf164
1 changed files with 1 additions and 1 deletions
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libavcodec/g729postfilter.c
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@ -389,7 +389,7 @@ static int16_t long_term_filter(DSPContext *dsp, int pitch_delay_int,
lt_filt_factor_a = (gain_den << 15) / (gain_den + gain_num);
}
#else
L64_temp0 = ((int64_t)gain_num) << (sh_gain_num - 1);
L64_temp0 = (((int64_t)gain_num) << sh_gain_num) >> 1;
L64_temp1 = ((int64_t)gain_den) << sh_gain_den;
lt_filt_factor_a = FFMAX((L64_temp1 << 15) / (L64_temp1 + L64_temp0), MIN_LT_FILT_FACTOR_A);
#endif