fixed compilation error and warnings under ubuntu

modules/gpu/include/opencv2/gpu/gpu.hpp

@@ -829,9 +829,9 @@ namespace cv
             // It queries current active device.
             static bool checkIfGpuCallReasonable();
 
+            int preset;
             int ndisp;
             int winSize;
-            int preset;
 
             // If avergeTexThreshold  == 0 => post procesing is disabled
             // If avergeTexThreshold != 0 then disparity is set 0 in each point (x,y) where for left image

modules/gpu/src/color.cpp

@@ -351,8 +351,7 @@ namespace
             
             case CV_XYZ2BGR: case CV_XYZ2RGB:
                 {
-                    typedef void (*func_t)(const DevMem2D& src, int srccn, const DevMem2D& dst, int dstcn, 
-                        const void* coeffs, cudaStream_t stream);
+                    typedef void (*func_t)(const DevMem2D& src, int srccn, const DevMem2D& dst, int dstcn, const void* coeffs, cudaStream_t stream);
                     static const func_t funcs[] = {color::XYZ2RGB_gpu_8u, 0, color::XYZ2RGB_gpu_16u, 0, 0, color::XYZ2RGB_gpu_32f};
 
                     if (dcn <= 0) dcn = 3;
@@ -392,7 +391,7 @@ namespace
                         
                     dst.create(sz, CV_MAKETYPE(depth, dcn));
                     
-                    const void* coeffs = depth == CV_32F ? (void*)coeffs_f : (void*)coeffs_i;
+                    //const void* coeffs = depth == CV_32F ? (void*)coeffs_f : (void*)coeffs_i;
 
                     funcs[depth](src, scn, dst, dcn, coeffs_i, stream);
                     break;

modules/gpu/src/error.cpp

@@ -67,7 +67,10 @@ namespace
         error_entry( NPP_NOT_SUPPORTED_MODE_ERROR ),
         error_entry( NPP_ROUND_MODE_NOT_SUPPORTED_ERROR ),
         error_entry( NPP_RESIZE_NO_OPERATION_ERROR ),
+
+#if defined (_MSC_VER)
         error_entry( NPP_NOT_SUFFICIENT_COMPUTE_CAPABILITY ),
+#endif
         error_entry( NPP_BAD_ARG_ERROR ),
         error_entry( NPP_LUT_NUMBER_OF_LEVELS_ERROR ),
         error_entry( NPP_TEXTURE_BIND_ERROR ),

modules/gpu/src/hog.cpp

@@ -313,7 +313,7 @@ void cv::gpu::HOGDescriptor::detectMultiScale(const GpuMat& img, vector<Rect>& f
     for (size_t i = 0; i < level_scale.size(); i++)
     {
         double scale = level_scale[i];
-        Size sz = Size_<double>(img.size()) * (1.0/scale);
+        Size sz(img.cols/scale, img.rows/scale);
         GpuMat smaller_img;
 
         if (sz == img.size())
@@ -328,10 +328,9 @@ void cv::gpu::HOGDescriptor::detectMultiScale(const GpuMat& img, vector<Rect>& f
         }
 
         detect(smaller_img, locations, hit_threshold, win_stride, padding);
-        Size scaled_win_size = Size_<double>(win_size) * scale;
+        Size scaled_win_size(win_size.width * scale, win_size.height * scale);
         for (size_t j = 0; j < locations.size(); j++)
-            all_candidates.push_back(Rect(Point2d(locations[j]) * scale, 
-                                          scaled_win_size));
+            all_candidates.push_back(Rect(Point2d((CvPoint)locations[j]) * scale, scaled_win_size));
     }
 
     found_locations.assign(all_candidates.begin(), all_candidates.end());