Bind pyfaust.opt_butterfly_faust to TransformHelper::optButterflyFaust and add...

Bind pyfaust.opt_butterfly_faust to TransformHelper::optButterflyFaust and add a (not yet implemented yet) GPU2 version of this function.

src/faust_linear_operator/GPU2/faust_TransformHelper_gpu.h

@@ -133,6 +133,7 @@ namespace Faust
 				virtual ~TransformHelper() {};
 				static TransformHelper<FPP,GPU2>* hadamardFaust(unsigned int n, const bool norma=true);
 				static TransformHelper<FPP,GPU2>* fourierFaust(unsigned int n, const bool norma=true);
+				static TransformHelper<FPP,GPU2>* optButterflyFaust(const TransformHelper<FPP, GPU2>* F);
 				static TransformHelper<FPP,GPU2>* eyeFaust(unsigned int n, unsigned int m);
 				TransformHelper<FPP,GPU2>* pruneout(const int nnz_tres, const int npasses=-1, const bool only_forward=false);
 

src/faust_linear_operator/GPU2/faust_TransformHelper_gpu.hpp

@@ -1003,6 +1003,13 @@ namespace Faust
 			return cpu_out;
 		}
 
+
+	template<typename FPP>
+		TransformHelper<FPP, Cpu>* TransformHelper<FPP,Cpu>::optButterflyFaust(const TransformHelper<FPP, GPU2>* F)
+		{
+			return TransformHelperButterfly<FPP, GPU2>::optFaust(F);
+		}
+
 }
 
 #include "faust_TransformHelper_cat_gpu.hpp"

wrapper/python/src/FaustCoreCpp.hpp

@@ -571,7 +571,7 @@ template<typename FPP, FDevice DEV>
 template<typename FPP, FDevice DEV>
   FaustCoreCpp<FPP,DEV>* FaustCoreCpp<FPP,DEV>::optimizeButterfly() const
 {
-      Faust::TransformHelper<FPP,DEV>* th = Faust::TransformHelperButterfly<FPP,DEV>::optFaust(this->transform);
+      Faust::TransformHelper<FPP,DEV>* th = Faust::TransformHelper<FPP,DEV>::optButterflyFaust(this->transform);
       if(!th) return NULL;
       FaustCoreCpp<FPP,DEV>* core = new FaustCoreCpp<FPP,DEV>(th);
       return core;