From 9254e6176c1a7e1498f1305619f46a3ab979816f Mon Sep 17 00:00:00 2001 From: Ganesh Ajjanagadde Date: Fri, 15 Jan 2016 13:38:43 -0500 Subject: lavc/atrac3plusdsp: change pow(2,x) to exp2f(x) Much faster generation possible; but array is small so don't want to bloat the binary. Reviewed-by: Michael Niedermayer Signed-off-by: Ganesh Ajjanagadde --- libavcodec/atrac3plusdsp.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/atrac3plusdsp.c b/libavcodec/atrac3plusdsp.c index 17c6437..d089588 100644 --- a/libavcodec/atrac3plusdsp.c +++ b/libavcodec/atrac3plusdsp.c @@ -28,6 +28,7 @@ #include #include "libavutil/float_dsp.h" +#include "libavutil/libm.h" #include "avcodec.h" #include "sinewin.h" #include "fft.h" @@ -107,7 +108,7 @@ av_cold void ff_atrac3p_init_wave_synth(void) /* generate amplitude scalefactors table */ for (i = 0; i < 64; i++) - amp_sf_tab[i] = pow(2.0f, ((double)i - 3) / 4.0f); + amp_sf_tab[i] = exp2f((i - 3) / 4.0f); } /** -- cgit v1.1