X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavfilter%2Faf_tremolo.c;h=6baeb7f110664575876c03d3b17d1e44d7dd1c80;hb=339af976b6fd9c05d1e75e75a5323efdb3d6afa1;hp=8cbc79892d1236d6c224b1ffbc2f3c1551fe6669;hpb=b8eb0827f053230dd919bc73e25381b47b4fe1a7;p=ffmpeg

diff --git a/libavfilter/af_tremolo.c b/libavfilter/af_tremolo.c
index 8cbc79892d1..6baeb7f1106 100644
--- a/libavfilter/af_tremolo.c
+++ b/libavfilter/af_tremolo.c
@@ -28,6 +28,7 @@ typedef struct TremoloContext {
     double freq;
     double depth;
     double *table;
+    int table_size;
     int index;
 } TremoloContext;
 
@@ -72,7 +73,7 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
         dst += channels;
         src += channels;
         s->index++;
-        if (s->index >= inlink->sample_rate / s->freq)
+        if (s->index >= s->table_size)
             s->index = 0;
     }
 
@@ -125,11 +126,12 @@ static int config_input(AVFilterLink *inlink)
     const double offset = 1. - s->depth / 2.;
     int i;
 
-    s->table = av_malloc_array(inlink->sample_rate / s->freq, sizeof(*s->table));
+    s->table_size = lrint(inlink->sample_rate / s->freq + 0.5);
+    s->table = av_malloc_array(s->table_size, sizeof(*s->table));
     if (!s->table)
         return AVERROR(ENOMEM);
 
-    for (i = 0; i < inlink->sample_rate / s->freq; i++) {
+    for (i = 0; i < s->table_size; 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;