aboutsummaryrefslogtreecommitdiffstats
path: root/libavcodec/imc.c
diff options
context:
space:
mode:
authorMichael Niedermayer <michaelni@gmx.at>2012-09-09 12:58:43 +0200
committerMichael Niedermayer <michaelni@gmx.at>2012-09-09 13:02:08 +0200
commit363d302ea30fcdeb230e77eae7fa5a876d3d8711 (patch)
tree1ea6a709a5c744c637129764e882e349ba346192 /libavcodec/imc.c
parenteab438eabbefb44b35d2db05f233509bec0c3502 (diff)
downloadffmpeg-363d302ea30fcdeb230e77eae7fa5a876d3d8711.tar.gz
imc: use exp2 instead of pow(2,...)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavcodec/imc.c')
-rw-r--r--libavcodec/imc.c3
1 files changed, 2 insertions, 1 deletions
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];