Copy ocl::queryDeviceInfo interface from master to 2.4.

Affected functions surf.ocl, pyrlk.ocl and hog.ocl are updated with the change.

modules/nonfree/src/surf.ocl.cpp

@@ -60,27 +60,24 @@ namespace cv
 
         const char noImage2dOption [] = "-D DISABLE_IMAGE2D";
 
-        static char SURF_OPTIONS [1024] = ""; 
-        static bool USE_IMAGE2d = false;
+        static bool use_image2d = false;
+
         static void openCLExecuteKernelSURF(Context *clCxt , const char **source, string kernelName, size_t globalThreads[3],
             size_t localThreads[3],  vector< pair<size_t, const void *> > &args, int channels, int depth)
         {
-            char * pSURF_OPTIONS = SURF_OPTIONS;
-            static bool OPTION_INIT = false;
-            if(!OPTION_INIT)
+            char optBuf [100] = {0};
+            char * optBufPtr = optBuf;
+            if( !use_image2d )
             {
-                if( !USE_IMAGE2d )
-                {
-                    strcat(pSURF_OPTIONS, noImage2dOption);
-                    pSURF_OPTIONS += strlen(noImage2dOption);
-                }
-
-                size_t wave_size = 0;
-                queryDeviceInfo(WAVEFRONT_SIZE, &wave_size);
-                std::sprintf(pSURF_OPTIONS, "-D WAVE_SIZE=%d", static_cast<int>(wave_size));
-                OPTION_INIT = true;
+                strcat(optBufPtr, noImage2dOption);
+                optBufPtr += strlen(noImage2dOption);
             }
-            openCLExecuteKernel(clCxt, source, kernelName, globalThreads, localThreads, args, channels, depth, SURF_OPTIONS);
+            cl_kernel kernel;
+            kernel = openCLGetKernelFromSource(clCxt, source, kernelName, optBufPtr);
+            size_t wave_size = queryDeviceInfo<WAVEFRONT_SIZE, size_t>(kernel);
+            CV_Assert(clReleaseKernel(kernel) == CL_SUCCESS);
+            sprintf(optBufPtr, "-D WAVE_SIZE=%d", static_cast<int>(wave_size));
+            openCLExecuteKernel(clCxt, source, kernelName, globalThreads, localThreads, args, channels, depth, optBufPtr);
         }
     }
 }
@@ -161,22 +158,12 @@ public:
         counters.setTo(Scalar::all(0));
 
         integral(img, surf_.sum);
-        if(support_image2d())
+        use_image2d = support_image2d();
+        if(use_image2d)
         {
-            try
-            {
-                bindImgTex(img, imgTex);
-                bindImgTex(surf_.sum, sumTex);
-                USE_IMAGE2d = true;
-            }
-            catch (const cv::Exception& e)
-            {
-                USE_IMAGE2d = false;
-                if(e.code != CL_IMAGE_FORMAT_NOT_SUPPORTED && e.code != -217)
-                {
-                    throw e;
-                }
-            }
+            bindImgTex(img, imgTex);
+            bindImgTex(surf_.sum, sumTex);
+            finish();
         }
 
         maskSumTex = 0;

modules/ocl/include/opencv2/ocl/private/util.hpp

@@ -128,11 +128,17 @@ namespace cv
         enum DEVICE_INFO
         {
             WAVEFRONT_SIZE,             //in AMD speak
-            WARP_SIZE = WAVEFRONT_SIZE, //in nvidia speak
             IS_CPU_DEVICE               //check if the device is CPU
         };
+        template<DEVICE_INFO _it, typename _ty>
+        _ty queryDeviceInfo(cl_kernel kernel = NULL);
         //info should have been pre-allocated
-        void CV_EXPORTS queryDeviceInfo(DEVICE_INFO info_type, void* info);
+        template<>
+        int CV_EXPORTS queryDeviceInfo<WAVEFRONT_SIZE, int>(cl_kernel kernel);
+        template<>
+        size_t CV_EXPORTS queryDeviceInfo<WAVEFRONT_SIZE, size_t>(cl_kernel kernel);
+        template<>
+        bool CV_EXPORTS queryDeviceInfo<IS_CPU_DEVICE, bool>(cl_kernel kernel);
 
     }//namespace ocl
 

modules/ocl/src/hog.cpp

@@ -1578,8 +1578,7 @@ static void openCLExecuteKernel_hog(Context *clCxt , const char **source, string
                                     size_t globalThreads[3], size_t localThreads[3], 
                                     vector< pair<size_t, const void *> > &args)
 {
-    size_t wave_size = 0;
-    queryDeviceInfo(WAVEFRONT_SIZE, &wave_size);
+    size_t wave_size = queryDeviceInfo<WAVEFRONT_SIZE, size_t>();
     if (wave_size <= 16)
     {
         char build_options[64];

modules/ocl/src/initialization.cpp

@@ -363,64 +363,43 @@ namespace cv
             clFinish(Context::getContext()->impl->clCmdQueue);
         }
 
-        void queryDeviceInfo(DEVICE_INFO info_type, void* info)
+        //template specializations of queryDeviceInfo
+        template<>
+        bool queryDeviceInfo<IS_CPU_DEVICE, bool>(cl_kernel)
         {
-            static Info::Impl* impl = Context::getContext()->impl;
-            switch(info_type)
-            {
-            case WAVEFRONT_SIZE:
-                {
-                    bool is_cpu = false;
-                    queryDeviceInfo(IS_CPU_DEVICE, &is_cpu);
-                    if(is_cpu)
-                    {
-                        *(int*)info = 1;
-                        return;
-                    }
-#ifdef CL_DEVICE_WAVEFRONT_WIDTH_AMD
-                    try
-                    {
-                        openCLSafeCall(clGetDeviceInfo(Context::getContext()->impl->devices[0], 
-                            CL_DEVICE_WAVEFRONT_WIDTH_AMD, sizeof(size_t), info, 0));
-                    }
-                    catch(const cv::Exception&)
-#elif defined (CL_DEVICE_WARP_SIZE_NV)
-                    const int EXT_LEN = 4096 + 1 ;
-                    char extends_set[EXT_LEN];
-                    size_t extends_size;
-                    openCLSafeCall(clGetDeviceInfo(impl->devices[impl->devnum], CL_DEVICE_EXTENSIONS, EXT_LEN, (void *)extends_set, &extends_size));
-                    extends_set[EXT_LEN - 1] = 0;
-                    if(std::string(extends_set).find("cl_nv_device_attribute_query") != std::string::npos)
-                    {
-                        openCLSafeCall(clGetDeviceInfo(Context::getContext()->impl->devices[0], 
-                            CL_DEVICE_WARP_SIZE_NV, sizeof(size_t), info, 0));
-                    }
-                    else
-#endif
-                    {
-                        // if no way left for us to query the warp size, we can get it from kernel group info
-                        static const char * _kernel_string = "__kernel void test_func() {}";
-                        cl_kernel kernel;
-                        kernel = openCLGetKernelFromSource(Context::getContext(), &_kernel_string, "test_func");
-                        openCLSafeCall(clGetKernelWorkGroupInfo(kernel, impl->devices[impl->devnum],
-                            CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE, sizeof(size_t), info, NULL));
-                    }
+            Info::Impl* impl = Context::getContext()->impl;
+            cl_device_type devicetype;
+            openCLSafeCall(clGetDeviceInfo(impl->devices[impl->devnum],
+                CL_DEVICE_TYPE, sizeof(cl_device_type),
+                &devicetype, NULL));
+            return (devicetype == CVCL_DEVICE_TYPE_CPU);
+        }
 
-                }
-                break;
-            case IS_CPU_DEVICE:
-                {
-                    cl_device_type devicetype;
-                    openCLSafeCall(clGetDeviceInfo(impl->devices[impl->devnum], 
-                                    CL_DEVICE_TYPE, sizeof(cl_device_type), 
-                                    &devicetype, NULL));
-                    *(bool*)info = (devicetype == CVCL_DEVICE_TYPE_CPU);
-                }
-                break;
-            default:
-                CV_Error(-1, "Invalid device info type");
-                break;
+        template<typename _ty>
+        static _ty queryWavesize(cl_kernel kernel)
+        {
+            size_t info = 0;
+            Info::Impl* impl = Context::getContext()->impl;
+            bool is_cpu = queryDeviceInfo<IS_CPU_DEVICE, bool>();
+            if(is_cpu)
+            {
+                return 1;
             }
+            CV_Assert(kernel != NULL);
+            openCLSafeCall(clGetKernelWorkGroupInfo(kernel, impl->devices[impl->devnum],
+                CL_KERNEL_PREFERRED_WORK_GROUP_SIZE_MULTIPLE, sizeof(size_t), &info, NULL));
+            return static_cast<_ty>(info);
+        }
+
+        template<>
+        size_t queryDeviceInfo<WAVEFRONT_SIZE, size_t>(cl_kernel kernel)
+        {
+            return queryWavesize<size_t>(kernel);
+        }
+        template<>
+        int queryDeviceInfo<WAVEFRONT_SIZE, int>(cl_kernel kernel)
+        {
+            return queryWavesize<int>(kernel);
         }
 
         void openCLReadBuffer(Context *clCxt, cl_mem dst_buffer, void *host_buffer, size_t size)

modules/ocl/src/pyrlk.cpp

@@ -187,8 +187,7 @@ static void lkSparse_run(oclMat &I, oclMat &J,
     args.push_back( make_pair( sizeof(cl_int), (void *)&iters ));
     args.push_back( make_pair( sizeof(cl_char), (void *)&calcErr ));
 
-    bool is_cpu;
-    queryDeviceInfo(IS_CPU_DEVICE, &is_cpu);
+    bool is_cpu = queryDeviceInfo<IS_CPU_DEVICE, bool>();
     if (is_cpu)
     {
         openCLExecuteKernel(clCxt, &pyrlk, kernelName, globalThreads, localThreads, args, I.oclchannels(), I.depth(), (char*)" -D CPU");