cuda::StreamAccessor::wrapStream and cuda::EventAccessor::wrapEvent

to import existed CUDA stream or CUDA event to OpenCV

modules/core/include/opencv2/core/cuda.hpp

@@ -528,6 +528,7 @@ public:
 
 private:
     Ptr<Impl> impl_;
+    Event(const Ptr<Impl>& impl);
 
     friend struct EventAccessor;
 };

modules/core/include/opencv2/core/cuda.inl.hpp

@@ -540,6 +540,16 @@ Stream::Stream(const Ptr<Impl>& impl)
 {
 }
 
+//===================================================================================
+// Event
+//===================================================================================
+
+inline
+Event::Event(const Ptr<Impl>& impl)
+    : impl_(impl)
+{
+}
+
 //===================================================================================
 // Initialization & Info
 //===================================================================================

modules/core/include/opencv2/core/cuda_stream_accessor.hpp

@@ -52,7 +52,7 @@
  */
 
 #include <cuda_runtime.h>
-#include "opencv2/core/cvdef.h"
+#include "opencv2/core/cuda.hpp"
 
 namespace cv
 {
@@ -62,14 +62,12 @@ namespace cv
 //! @addtogroup cudacore_struct
 //! @{
 
-        class Stream;
-        class Event;
-
         /** @brief Class that enables getting cudaStream_t from cuda::Stream
          */
         struct StreamAccessor
         {
             CV_EXPORTS static cudaStream_t getStream(const Stream& stream);
+            CV_EXPORTS static Stream wrapStream(cudaStream_t stream);
         };
 
         /** @brief Class that enables getting cudaEvent_t from cuda::Event
@@ -77,6 +75,7 @@ namespace cv
         struct EventAccessor
         {
             CV_EXPORTS static cudaEvent_t getEvent(const Event& event);
+            CV_EXPORTS static Event wrapEvent(cudaEvent_t event);
         };
 
 //! @}