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Simplify: move division by constant off the loop

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Originally committed as revision 15402 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Vitor Sessak
2008-09-24 20:03:58 +00:00
parent 4e240985d8
commit a987a126fd
1 changed files with 3 additions and 2 deletions
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5
libavcodec/ra288.c
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@ -88,10 +88,11 @@ static void decode(RA288Context *ractx, float gain, int cb_coef)
sum = av_clipf(sum, 0, 60);
/* block 48 of G.728 spec */
sumsum = exp(sum * 0.1151292546497) * gain; /* pow(10.0,sum/20)*gain */
/* exp(sum * 0.1151292546497) == pow(10.0,sum/20) */
sumsum = exp(sum * 0.1151292546497) * gain / 2048.;
for (i=0; i < 5; i++)
buffer[i] = codetable[cb_coef][i] * sumsum * (1./2048.);
buffer[i] = codetable[cb_coef][i] * sumsum;
sum = scalar_product_float(buffer, buffer, 5) / 5;