Merge commit '84adab333cddeefc3cfd843089dee23f58bd372c'

[ffmpeg] / libswscale / utils.c

diff --git a/libswscale/utils.c b/libswscale/utils.c
index 8fd0ab6921e68f0530c77da8326b4c6b4644ecf4..db937b160f90bded884287e43d56441f5b324440 100644 (file)
--- 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) {