avfilter/af_astats: clip input value to prevent overflow

libavfilter/af_astats.c

@@ -329,7 +329,7 @@ static inline void update_stat(AudioStatsContext *s, ChannelStats *p, double d,
 
     drop = p->win_samples[p->win_pos];
     p->win_samples[p->win_pos] = nd;
-    index = av_clip(FFABS(nd) * HISTOGRAM_MAX, 0, HISTOGRAM_MAX);
+    index = av_clip(FFABS(av_clipd(nd, -1.0, 1.0)) * HISTOGRAM_MAX, 0, HISTOGRAM_MAX);
     p->max_index = FFMAX(p->max_index, index);
     p->histogram[index]++;
     if (!isnan(p->noise_floor))