Merge commit 'ff79f6b35a94dde69b3d52bd2abdfdb793f525c3' into release/2.2

* commit 'ff79f6b35a94dde69b3d52bd2abdfdb793f525c3':
  avfilter: Add missing emms_c when needed

Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavfilter/af_volume.c

@@ -389,6 +389,8 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *buf)
         }
     }
 
+    emms_c();
+
     if (buf != out_buf)
         av_frame_free(&buf);
 

libavfilter/vf_hqdn3d.c

@@ -147,6 +147,7 @@ static void denoise_depth(HQDN3DContext *s,
     else
         denoise_temporal(src, dst, frame_ant,
                          w, h, sstride, dstride, temporal, depth);
+    emms_c();
 }
 
 #define denoise(...) \