fixed gpu::LUT on multi device system

modules/gpu/src/arithm.cpp

@@ -319,40 +319,14 @@ void cv::gpu::flip(const GpuMat& src, GpuMat& dst, int flipCode, Stream& stream)
 
 void cv::gpu::LUT(const GpuMat& src, const Mat& lut, GpuMat& dst, Stream& s)
 {
-    class LevelsInit
-    {
-    public:
-        Npp32s pLevels[256];
-        const Npp32s* pLevels3[3];
-        int nValues3[3];
-
-#if (CUDA_VERSION > 4020)
-        GpuMat d_pLevels;
-#endif
-
-        LevelsInit()
-        {
-            nValues3[0] = nValues3[1] = nValues3[2] = 256;
-            for (int i = 0; i < 256; ++i)
-                pLevels[i] = i;
-
+    const int cn = src.channels();
 
-#if (CUDA_VERSION <= 4020)
-            pLevels3[0] = pLevels3[1] = pLevels3[2] = pLevels;
-#else
-            d_pLevels.upload(Mat(1, 256, CV_32S, pLevels));
-            pLevels3[0] = pLevels3[1] = pLevels3[2] = d_pLevels.ptr<Npp32s>();
-#endif
-        }
-    };
-    static LevelsInit lvls;
+    CV_Assert( src.type() == CV_8UC1 || src.type() == CV_8UC3 );
+    CV_Assert( lut.depth() == CV_8U );
+    CV_Assert( lut.channels() == 1 || lut.channels() == cn );
+    CV_Assert( lut.rows * lut.cols == 256 && lut.isContinuous() );
 
-    int cn = src.channels();
-
-    CV_Assert(src.type() == CV_8UC1 || src.type() == CV_8UC3);
-    CV_Assert(lut.depth() == CV_8U && (lut.channels() == 1 || lut.channels() == cn) && lut.rows * lut.cols == 256 && lut.isContinuous());
-
-    dst.create(src.size(), CV_MAKETYPE(lut.depth(), cn));
+    dst.create(src.size(), CV_MAKE_TYPE(lut.depth(), cn));
 
     NppiSize sz;
     sz.height = src.rows;
@@ -361,19 +335,34 @@ void cv::gpu::LUT(const GpuMat& src, const Mat& lut, GpuMat& dst, Stream& s)
     Mat nppLut;
     lut.convertTo(nppLut, CV_32S);
 
-    cudaStream_t stream = StreamAccessor::getStream(s);
+    int nValues3[] = {256, 256, 256};
+
+    Npp32s pLevels[256];
+    for (int i = 0; i < 256; ++i)
+        pLevels[i] = i;
+
+    const Npp32s* pLevels3[3];
 
+#if (CUDA_VERSION <= 4020)
+    pLevels3[0] = pLevels3[1] = pLevels3[2] = pLevels;
+#else
+    GpuMat d_pLevels;
+    d_pLevels.upload(Mat(1, 256, CV_32S, pLevels));
+    pLevels3[0] = pLevels3[1] = pLevels3[2] = d_pLevels.ptr<Npp32s>();
+#endif
+
+    cudaStream_t stream = StreamAccessor::getStream(s);
     NppStreamHandler h(stream);
 
     if (src.type() == CV_8UC1)
     {
 #if (CUDA_VERSION <= 4020)
         nppSafeCall( nppiLUT_Linear_8u_C1R(src.ptr<Npp8u>(), static_cast<int>(src.step),
-            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, nppLut.ptr<Npp32s>(), lvls.pLevels, 256) );
+            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, nppLut.ptr<Npp32s>(), pLevels, 256) );
 #else
         GpuMat d_nppLut(Mat(1, 256, CV_32S, nppLut.data));
         nppSafeCall( nppiLUT_Linear_8u_C1R(src.ptr<Npp8u>(), static_cast<int>(src.step),
-            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, d_nppLut.ptr<Npp32s>(), lvls.d_pLevels.ptr<Npp32s>(), 256) );
+            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, d_nppLut.ptr<Npp32s>(), d_pLevels.ptr<Npp32s>(), 256) );
 #endif
     }
     else
@@ -410,7 +399,7 @@ void cv::gpu::LUT(const GpuMat& src, const Mat& lut, GpuMat& dst, Stream& s)
         }
 
         nppSafeCall( nppiLUT_Linear_8u_C3R(src.ptr<Npp8u>(), static_cast<int>(src.step),
-            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, pValues3, lvls.pLevels3, lvls.nValues3) );
+            dst.ptr<Npp8u>(), static_cast<int>(dst.step), sz, pValues3, pLevels3, nValues3) );
     }
 
     if (stream == 0)