@@ -72,7 +72,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)

         dst += channels;

         src += channels;

         s->index++;

-        if (s->index >= inlink->sample_rate)

+        if (s->index >= inlink->sample_rate / s->freq)

             s->index = 0;

     }

@@ -125,11 +125,11 @@ static int config_input(AVFilterLink *inlink)

     const double offset = 1. - s->depth / 2.;

     int i;

-    s->table = av_malloc_array(inlink->sample_rate, sizeof(*s->table));

+    s->table = av_malloc_array(inlink->sample_rate / s->freq, sizeof(*s->table));

     if (!s->table)

         return AVERROR(ENOMEM);

-    for (i = 0; i < inlink->sample_rate; i++) {

+    for (i = 0; i < inlink->sample_rate / s->freq; i++) {

         double env = s->freq * i / inlink->sample_rate;

         env = sin(2 * M_PI * fmod(env + 0.25, 1.0));

         s->table[i] = env * (1 - fabs(offset)) + offset;