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| author | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-12-07 23:05:05 -0500 |
|---|---|---|
| committer | Ganesh Ajjanagadde <gajjanagadde@gmail.com> | 2015-12-08 22:00:05 -0500 |
| commit | c8905e0d67f54b3228ea0aec57b7087925c0508b (patch) | |
| tree | 783d46a0a2ae60f28a515eec23668aa653a04937 /libswscale | |
| parent | 42868ca569f33b91b0e61ecc3065e7199e9ca58a (diff) | |
| download | ffmpeg-streaming-c8905e0d67f54b3228ea0aec57b7087925c0508b.zip ffmpeg-streaming-c8905e0d67f54b3228ea0aec57b7087925c0508b.tar.gz | |
swscale/utils: replace pow by exp2
exp2 is a faster function.
Reviewed-by: Michael Niedermayer <michael@niedermayer.cc>
Signed-off-by: Ganesh Ajjanagadde <gajjanagadde@gmail.com>
Diffstat (limited to 'libswscale')
| -rw-r--r-- | libswscale/utils.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/libswscale/utils.c b/libswscale/utils.c index 8fd0ab6..db937b1 100644 --- a/libswscale/utils.c +++ b/libswscale/utils.c @@ -45,6 +45,7 @@ #include "libavutil/cpu.h" #include "libavutil/imgutils.h" #include "libavutil/intreadwrite.h" +#include "libavutil/libm.h" #include "libavutil/mathematics.h" #include "libavutil/opt.h" #include "libavutil/pixdesc.h" @@ -451,7 +452,7 @@ static av_cold int initFilter(int16_t **outFilter, int32_t **filterPos, coeff *= fone >> (30 + 16); } else if (flags & SWS_GAUSS) { double p = param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; - coeff = (pow(2.0, -p * floatd * floatd)) * fone; + coeff = exp2(-p * floatd * floatd) * fone; } else if (flags & SWS_SINC) { coeff = (d ? sin(floatd * M_PI) / (floatd * M_PI) : 1.0) * fone; } else if (flags & SWS_LANCZOS) { |
