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| author | Vitor Sessak <vitor1001@gmail.com> | 2008-09-24 20:03:58 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2008-09-24 20:03:58 +0000 |
| commit | a987a126fd29bb234e82a7ea699d4ca3326c684c (patch) | |
| tree | 39c70319dd22dbee3c314a575f8b711713e34e00 | |
| parent | 4e240985d8b856e62e4e0377283138cf51cc398e (diff) | |
| download | ffmpeg-a987a126fd29bb234e82a7ea699d4ca3326c684c.tar.gz | |
Simplify: move division by constant off the loop
Originally committed as revision 15402 to svn://svn.ffmpeg.org/ffmpeg/trunk
| -rw-r--r-- | libavcodec/ra288.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c index f7e1af55a0..bfc2b37665 100644 --- a/libavcodec/ra288.c +++ b/libavcodec/ra288.c @@ -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; |