From 363d302ea30fcdeb230e77eae7fa5a876d3d8711 Mon Sep 17 00:00:00 2001
From: Michael Niedermayer <michaelni@gmx.at>
Date: Sun, 9 Sep 2012 12:58:43 +0200
Subject: [PATCH] imc: use exp2 instead of pow(2,...)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
---
libavcodec/imc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/libavcodec/imc.c b/libavcodec/imc.c
index ba48df74607..73f1de3ac73 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];
--
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