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Slightly increase the safety margin for opus_pcm_soft_clip()

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No values outside of +/-1 detected now.
This commit is contained in:
Jean-Marc Valin 2016-07-15 14:29:16 -04:00
parent bca70b87ef
commit aa32042a50
1 changed files with 2 additions and 2 deletions
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4
src/opus.c
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@ -104,10 +104,10 @@ OPUS_EXPORT void opus_pcm_soft_clip(float *_x, int N, int C, float *declip_mem)
/* Compute a such that maxval + a*maxval^2 = 1 */ /* Compute a such that maxval + a*maxval^2 = 1 */
a=(maxval-1)/(maxval*maxval); a=(maxval-1)/(maxval*maxval);
/* Slightly boost "a" by 2^-24. This is just enough to ensure -ffast-math /* Slightly boost "a" by 2^-22. This is just enough to ensure -ffast-math
does not cause output values larger than +/-1, but small enough not does not cause output values larger than +/-1, but small enough not
to matter even for 24-bit output. */ to matter even for 24-bit output. */
a += a*6e-8; a += a*2.4e-7;
if (x[i*C]>0) if (x[i*C]>0)
a = -a; a = -a;
/* Apply soft clipping */ /* Apply soft clipping */