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| author | Vitor Sessak <vitor1001@gmail.com> | 2008-09-24 20:31:24 +0000 |
|---|---|---|
| committer | Vitor Sessak <vitor1001@gmail.com> | 2008-09-24 20:31:24 +0000 |
| commit | b6c77581683c9ed0b5a72e2b598291162d12cf4b (patch) | |
| tree | 2293e923c109c785b38f4f01cd20caab5c5f64e8 /libavcodec | |
| parent | e60daa340b57040ecfeb888c8f917efecca97e49 (diff) | |
| download | ffmpeg-b6c77581683c9ed0b5a72e2b598291162d12cf4b.tar.gz | |
Move constant multiplication out of the loop
Originally committed as revision 15404 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec')
| -rw-r--r-- | libavcodec/ra288.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/libavcodec/ra288.c b/libavcodec/ra288.c index 3993c342ea..11d5e4c6ec 100644 --- a/libavcodec/ra288.c +++ b/libavcodec/ra288.c @@ -96,12 +96,12 @@ static void decode(RA288Context *ractx, float gain, int cb_coef) /* block 48 of G.728 spec */ /* exp(sum * 0.1151292546497) == pow(10.0,sum/20) */ - sumsum = exp(sum * 0.1151292546497) * gain / 2048.; + sumsum = exp(sum * 0.1151292546497) * gain / (2048 * 4096); for (i=0; i < 5; i++) buffer[i] = codetable[cb_coef][i] * sumsum; - sum = scalar_product_float(buffer, buffer, 5) / 5; + sum = (4096 * 4096) * scalar_product_float(buffer, buffer, 5) / 5; sum = FFMAX(sum, 1); @@ -118,7 +118,7 @@ static void decode(RA288Context *ractx, float gain, int cb_coef) /* output */ for (i=0; i < 5; i++) - block[i] = av_clipf(block[i], -4095, 4095); + block[i] = av_clipf(block[i], -4095./4096., 4095./4096.); } /** @@ -210,7 +210,7 @@ static int ra288_decode_frame(AVCodecContext * avctx, void *data, decode(ractx, gain, cb_coef); for (j=0; j < 5; j++) - *(out++) = (1/4096.) * ractx->sp_hist[70 + 36 + j]; + *(out++) = ractx->sp_hist[70 + 36 + j]; if ((i & 7) == 3) backward_filter(ractx); |