Fix memory leaks on VapourSynth

Author: msg7086

delogohd_filter.hpp

@@ -64,6 +64,7 @@ class DelogoHDFilter: public Interface {
       engine->template processImage<uint16_t>(dst->GetWritePtr(PLANAR_V), this->stride(dst, PLANAR_V), this->width(dst, PLANAR_V), this->height(dst, PLANAR_V), 2, opacity);
 
     }
+    this->FreeFrame(src);
 
     return dst;
   }

wrapper/avs_filter.hpp

@@ -48,6 +48,8 @@ class AVSFilter : public IClip {
     _env->MakeWritable(&frame);
     return frame;
   }
+
+  void FreeFrame(const PVideoFrame frame) { }
   int ssw() const { return vi.GetPlaneWidthSubsampling(PLANAR_U); }
   int ssh() const { return vi.GetPlaneHeightSubsampling(PLANAR_U); }
 

wrapper/vs_filter.hpp

@@ -147,6 +147,10 @@ class VSFilter {
   AFrame* Dup(AFrame* frame) {
     return frame->dup();
   }
+
+  void FreeFrame(AFrame* frame) {
+    _vsapi->freeFrame(frame->_frame);
+  }
   int ssw() const { return vi._vi.format->subSamplingW; }
   int ssh() const { return vi._vi.format->subSamplingH; }