avfilter/af_anlmdn: ignore too small values

6 years ago · ed3b64402e
parent 8a1fc95840
commit ed3b64402e
1 changed files with 4 additions and 1 deletions
--- a/libavfilter/af_anlmdn.c
+++ b/libavfilter/af_anlmdn.c
@ -168,7 +168,10 @@ static int filter_channel(AVFilterContext *ctx, void *arg, int ch, int nb_jobs)
            float w;

            av_assert0(distance >= 0.f);
-            w = expf(-distance * sw);
+            w = -distance * sw;
+            if (w < -11.f)
+                continue;
+            w = expf(w);
            P += w * f[i - S + j + (j >= S)];
            Q += w;
        }