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libavcodec/mpegaudio_tablegen: clip value before casting

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Avoids FPE on alpha

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-22 12:48:47 +02:00
parent c68faca68e
commit da30d0cec3
1 changed files with 1 additions and 1 deletions
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libavcodec/mpegaudio_tablegen.h
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@ -63,7 +63,7 @@ static void mpegaudio_tableinit(void)
/* cbrtf() isn't available on all systems, so we use powf(). */ /* cbrtf() isn't available on all systems, so we use powf(). */
double f = (double)value * pow(value, 1.0 / 3.0) * pow(2, (exponent - 400) * 0.25 + FRAC_BITS + 5) / IMDCT_SCALAR; double f = (double)value * pow(value, 1.0 / 3.0) * pow(2, (exponent - 400) * 0.25 + FRAC_BITS + 5) / IMDCT_SCALAR;
/* llrint() isn't always available, so round and cast manually. */ /* llrint() isn't always available, so round and cast manually. */
expval_table_fixed[exponent][value] = (long long int) floor(f + 0.5); expval_table_fixed[exponent][value] = (long long int) FFMIN(floor(f + 0.5), 0xFFFFFFFF);
expval_table_float[exponent][value] = f; expval_table_float[exponent][value] = f;
} }
exp_table_fixed[exponent] = expval_table_fixed[exponent][1]; exp_table_fixed[exponent] = expval_table_fixed[exponent][1];