[+] CUDA path for NCVImagePyramid

modules/gpu/src/nvidia/core/NCV.hpp

@@ -331,6 +331,7 @@ enum
     NCV_HAAR_XML_LOADING_EXCEPTION,
 
     NCV_NOIMPL_HAAR_TILTED_FEATURES,
+    NCV_NOT_IMPLEMENTED,
 
     NCV_WARNING_HAAR_DETECTIONS_VECTOR_OVERFLOW,
 

modules/gpu/src/nvidia/core/NCVAlg.hpp

@@ -45,6 +45,15 @@
 #include "NCV.hpp"
 
 
+template <class T>
+static void swap(T &p1, T &p2)
+{
+    T tmp = p1;
+    p1 = p2;
+    p2 = tmp;
+}
+
+
 template<typename T>
 static T divUp(T a, T b)
 {