fix warning in CUDA samples

modules/gpu/src/cuda/bf_knnmatch.cu

@@ -1034,7 +1034,7 @@ namespace cv { namespace gpu { namespace device
                 cudaSafeCall( cudaDeviceSynchronize() );
         }
 
-        void findKnnMatchDispatcher(int k, const PtrStepSzb& trainIdx, const PtrStepSzb& distance, const PtrStepSzf& allDist, int cc, cudaStream_t stream)
+        void findKnnMatchDispatcher(int k, const PtrStepSzb& trainIdx, const PtrStepSzb& distance, const PtrStepSzf& allDist, int /*cc*/, cudaStream_t stream)
         {
             findKnnMatch<256>(k, static_cast<PtrStepSzi>(trainIdx), static_cast<PtrStepSzf>(distance), allDist, stream);
         }

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

@@ -288,7 +288,7 @@ NCV_EXPORTS void ncvSetDebugOutputHandler(NCVDebugOutputHandler* func);
     do \
     { \
         cudaError_t res = cudacall; \
-        ncvAssertPrintReturn(cudaSuccess==res, "cudaError_t=" << res, errCode); \
+        ncvAssertPrintReturn(cudaSuccess==res, "cudaError_t=" << (int)res, errCode); \
     } while (0)
 
 

samples/gpu/cascadeclassifier_nvidia_api.cpp

@@ -30,7 +30,7 @@ const Size2i preferredVideoFrameSize(640, 480);
 const string wndTitle = "NVIDIA Computer Vision :: Haar Classifiers Cascade";
 
 
-void matPrint(Mat &img, int lineOffsY, Scalar fontColor, const string &ss)
+static void matPrint(Mat &img, int lineOffsY, Scalar fontColor, const string &ss)
 {
     int fontFace = FONT_HERSHEY_DUPLEX;
     double fontScale = 0.8;
@@ -45,7 +45,7 @@ void matPrint(Mat &img, int lineOffsY, Scalar fontColor, const string &ss)
 }
 
 
-void displayState(Mat &canvas, bool bHelp, bool bGpu, bool bLargestFace, bool bFilter, double fps)
+static void displayState(Mat &canvas, bool bHelp, bool bGpu, bool bLargestFace, bool bFilter, double fps)
 {
     Scalar fontColorRed = CV_RGB(255,0,0);
     Scalar fontColorNV  = CV_RGB(118,185,0);
@@ -74,7 +74,7 @@ void displayState(Mat &canvas, bool bHelp, bool bGpu, bool bLargestFace, bool bF
 }
 
 
-NCVStatus process(Mat *srcdst,
+static NCVStatus process(Mat *srcdst,
                   Ncv32u width, Ncv32u height,
                   NcvBool bFilterRects, NcvBool bLargestFace,
                   HaarClassifierCascadeDescriptor &haar,
@@ -281,7 +281,7 @@ int main(int argc, const char** argv)
     //==============================================================================
 
     namedWindow(wndTitle, 1);
-    Mat gray, frameDisp;
+    Mat frameDisp;
 
     do
     {

samples/gpu/opticalflow_nvidia_api.cpp

@@ -59,7 +59,7 @@ public:
 class RgbToR
 {
 public:
-    float operator ()(unsigned char b, unsigned char g, unsigned char r)
+    float operator ()(unsigned char /*b*/, unsigned char /*g*/, unsigned char r)
     {
         return static_cast<float>(r)/255.0f;
     }
@@ -69,7 +69,7 @@ public:
 class RgbToG
 {
 public:
-    float operator ()(unsigned char b, unsigned char g, unsigned char r)
+    float operator ()(unsigned char /*b*/, unsigned char g, unsigned char /*r*/)
     {
         return static_cast<float>(g)/255.0f;
     }
@@ -78,7 +78,7 @@ public:
 class RgbToB
 {
 public:
-    float operator ()(unsigned char b, unsigned char g, unsigned char r)
+    float operator ()(unsigned char b, unsigned char /*g*/, unsigned char /*r*/)
     {
         return static_cast<float>(b)/255.0f;
     }
@@ -135,7 +135,7 @@ NCVStatus CopyData(const IplImage *image, const NCVMatrixAlloc<Ncv32f> &dst)
     return NCV_SUCCESS;
 }
 
-NCVStatus LoadImages (const char *frame0Name,
+static NCVStatus LoadImages (const char *frame0Name,
                       const char *frame1Name,
                       int &width,
                       int &height,
@@ -186,7 +186,7 @@ inline T MapValue (T x, T a, T b, T c, T d)
     return c + (d - c) * (x - a) / (b - a);
 }
 
-NCVStatus ShowFlow (NCVMatrixAlloc<Ncv32f> &u, NCVMatrixAlloc<Ncv32f> &v, const char *name)
+static NCVStatus ShowFlow (NCVMatrixAlloc<Ncv32f> &u, NCVMatrixAlloc<Ncv32f> &v, const char *name)
 {
     IplImage *flowField;
 
@@ -246,7 +246,7 @@ NCVStatus ShowFlow (NCVMatrixAlloc<Ncv32f> &u, NCVMatrixAlloc<Ncv32f> &v, const
     return NCV_SUCCESS;
 }
 
-IplImage *CreateImage (NCVMatrixAlloc<Ncv32f> &h_r, NCVMatrixAlloc<Ncv32f> &h_g, NCVMatrixAlloc<Ncv32f> &h_b)
+static IplImage *CreateImage (NCVMatrixAlloc<Ncv32f> &h_r, NCVMatrixAlloc<Ncv32f> &h_g, NCVMatrixAlloc<Ncv32f> &h_b)
 {
     CvSize imageSize = cvSize (h_r.width (), h_r.height ());
     IplImage *image  = cvCreateImage (imageSize, IPL_DEPTH_8U, 4);
@@ -270,7 +270,7 @@ IplImage *CreateImage (NCVMatrixAlloc<Ncv32f> &h_r, NCVMatrixAlloc<Ncv32f> &h_g,
     return image;
 }
 
-void PrintHelp ()
+static void PrintHelp ()
 {
     std::cout << "Usage help:\n";
     std::cout << std::setiosflags(std::ios::left);
@@ -286,7 +286,7 @@ void PrintHelp ()
     std::cout << "\t" << std::setw(15) << PARAM_HELP << " - display this help message\n";
 }
 
-int ProcessCommandLine(int argc, char **argv,
+static int ProcessCommandLine(int argc, char **argv,
                        Ncv32f &timeStep,
                        char *&frame0Name,
                        char *&frame1Name,