X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Famrwbdec.c;h=47fe7eb55e1882e1f381caf007dd80de69fc8fd7;hb=0a319bcce5714f7183b0537892f7d37d7a31493a;hp=7f2874d35f39c9205780602e891fc3bdae819eab;hpb=75aa14b870226536d38ec90857ab741e196f70f3;p=ffmpeg

diff --git a/libavcodec/amrwbdec.c b/libavcodec/amrwbdec.c
index 7f2874d35f3..47fe7eb55e1 100644
--- a/libavcodec/amrwbdec.c
+++ b/libavcodec/amrwbdec.c
@@ -862,15 +862,20 @@ static float find_hb_gain(AMRWBContext *ctx, const float *synth,
 {
     int wsp = (vad > 0);
     float tilt;
+    float tmp;
 
     if (ctx->fr_cur_mode == MODE_23k85)
         return qua_hb_gain[hb_idx] * (1.0f / (1 << 14));
 
-    tilt = ctx->celpm_ctx.dot_productf(synth, synth + 1, AMRWB_SFR_SIZE - 1) /
-           ctx->celpm_ctx.dot_productf(synth, synth, AMRWB_SFR_SIZE);
+    tmp = ctx->celpm_ctx.dot_productf(synth, synth + 1, AMRWB_SFR_SIZE - 1);
+
+    if (tmp > 0) {
+        tilt = tmp / ctx->celpm_ctx.dot_productf(synth, synth, AMRWB_SFR_SIZE);
+    } else
+        tilt = 0;
 
     /* return gain bounded by [0.1, 1.0] */
-    return av_clipf((1.0 - FFMAX(0.0, tilt)) * (1.25 - 0.25 * wsp), 0.1, 1.0);
+    return av_clipf((1.0 - tilt) * (1.25 - 0.25 * wsp), 0.1, 1.0);
 }
 
 /**