From 363d302ea30fcdeb230e77eae7fa5a876d3d8711 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 9 Sep 2012 12:58:43 +0200 Subject: [PATCH] imc: use exp2 instead of pow(2,...) Signed-off-by: Michael Niedermayer --- libavcodec/imc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/imc.c b/libavcodec/imc.c index ba48df7460..73f1de3ac7 100644 --- a/libavcodec/imc.c +++ b/libavcodec/imc.c @@ -40,6 +40,7 @@ #include "dsputil.h" #include "fft.h" #include "libavutil/audioconvert.h" +#include "libavutil/libm.h" #include "sinewin.h" #include "imcdata.h" @@ -341,7 +342,7 @@ static void imc_decode_level_coefficients(IMCContext *q, int *levlCoeffBuf, float tmp, tmp2; // maybe some frequency division thingy - flcoeffs1[0] = 20000.0 / pow (2, levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125 + flcoeffs1[0] = 20000.0 / exp2 (levlCoeffBuf[0] * 0.18945); // 0.18945 = log2(10) * 0.05703125 flcoeffs2[0] = log2f(flcoeffs1[0]); tmp = flcoeffs1[0]; tmp2 = flcoeffs2[0];