Guard against parameter updates from audio thread in Model Objects whilst processing

include/wrapper/NonRealtime.hpp

@@ -950,17 +950,22 @@ namespace impl {
       
       void next(int)
       {
-                    
+        Wrapper::getInterfaceTable()->fClearUnitOutputs(this, mNumOutputs);
         index id = static_cast<index>(in0(1));
         if(mID != id) init();
         if(!mInit) return;
+        if(mSpinlock.tryLock())
+        {
           if(auto ptr = mInst.lock())
           {
             auto& client = ptr->mClient;
             auto& params = ptr->mParams;
             mControls.reset(mInBuf + ControlOffset());
-          mDelegate.next(*this,client,params,mControls);
+            mDelegate.next(*this,client,params,mControls, ptr.use_count() == 2);
           }else printNotFound(id);
+          mSpinlock.unlock(); 
+        }
+        
       }
       
     private:

include/wrapper/RealTimeBase.hpp

@@ -122,14 +122,17 @@ namespace impl{
       }
    }
     
-   void next(SCUnit& unit, Client& client,Params& params,FloatControlsIter& controls)
+   void next(SCUnit& unit, Client& client,Params& params,FloatControlsIter& controls,bool updateParams = true)
    {   
      bool trig =  IsModel_t<Client>::value ? !mPrevTrig  && unit.in0(0) > 0 : false;
 
      mPrevTrig = trig;
      
+     if(updateParams)
+     {
       Wrapper::setParams(&unit, params, controls);
       params.constrainParameterValuesRT(nullptr);
+     }
      
      for (index i = 0; i < client.audioChannelsIn(); ++i)
      {