avfilter/af_dynaudnorm: remove wasteful pow

[ffmpeg] / libavcodec / snowenc.c

diff --git a/libavcodec/snowenc.c b/libavcodec/snowenc.c
index 7e8269cd925824aeeff3ec6575ba5e97f54f867e..fb0cd3f47419f6043e1420fdbc213c01e5801a9e 100644 (file)
--- a/libavcodec/snowenc.c
+++ b/libavcodec/snowenc.c
@@ -1547,7 +1547,7 @@ static void calculate_visual_weight(SnowContext *s, Plane *p){
                 }
             }
 
-            b->qlog= (int)(log(352256.0/sqrt(error)) / log(pow(2.0, 1.0/QROOT))+0.5);
+            b->qlog= (int)(QROOT * log2(352256.0/sqrt(error)) + 0.5);
         }
     }
 }