added cv::countNonZero to T-API

modules/core/src/opencl/count_non_zero.cl

+////////////////////////////////////////////////////////////////////////////////////////
+//
+//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
+//
+//  By downloading, copying, installing or using the software you agree to this license.
+//  If you do not agree to this license, do not download, install,
+//  copy or use the software.
+//
+//
+//                           License Agreement
+//                For Open Source Computer Vision Library
+//
+// Copyright (C) 2010-2012, Institute Of Software Chinese Academy Of Science, all rights reserved.
+// Copyright (C) 2010-2012, Advanced Micro Devices, Inc., all rights reserved.
+// Third party copyrights are property of their respective owners.
+//
+// @Authors
+//    Shengen Yan,yanshengen@gmail.com
+//
+// Redistribution and use in source and binary forms, with or without modification,
+// are permitted provided that the following conditions are met:
+//
+//   * Redistribution's of source code must retain the above copyright notice,
+//     this list of conditions and the following disclaimer.
+//
+//   * Redistribution's in binary form must reproduce the above copyright notice,
+//     this list of conditions and the following disclaimer in the documentation
+//     and/or other materials provided with the distribution.
+//
+//   * The name of the copyright holders may not be used to endorse or promote products
+//     derived from this software without specific prior written permission.
+//
+// This software is provided by the copyright holders and contributors as is and
+// any express or implied warranties, including, but not limited to, the implied
+// warranties of merchantability and fitness for a particular purpose are disclaimed.
+// In no event shall the Intel Corporation or contributors be liable for any direct,
+// indirect, incidental, special, exemplary, or consequential damages
+// (including, but not limited to, procurement of substitute goods or services;
+// loss of use, data, or profits; or business interruption) however caused
+// and on any theory of liability, whether in contract, strict liability,
+// or tort (including negligence or otherwise) arising in any way out of
+// the use of this software, even if advised of the possibility of such damage.
+//
+
+#ifdef DOUBLE_SUPPORT
+#ifdef cl_amd_fp64
+#pragma OPENCL EXTENSION cl_amd_fp64:enable
+#elif defined (cl_khr_fp64)
+#pragma OPENCL EXTENSION cl_khr_fp64:enable
+#endif
+#endif
+
+/**************************************Count NonZero**************************************/
+
+__kernel void count_non_zero(__global const uchar * srcptr, int step, int offset, int cols,
+                            int total, int groupnum, __global uchar * dstptr)
+{
+    int lid = get_local_id(0);
+    int gid = get_group_id(0);
+    int  id = get_global_id(0);
+
+    __local int localmem[WGS2_ALIGNED];
+    if (lid < WGS2_ALIGNED)
+        localmem[lid] = 0;
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    int nonzero = (int)(0), src_index;
+    srcT zero = (srcT)(0), one = (srcT)(1);
+
+    for (int grain = groupnum * WGS; id < total; id += grain)
+    {
+        src_index = mad24(id / cols, step, offset + (id % cols) * (int)sizeof(srcT));
+        __global const srcT * src = (__global const srcT *)(srcptr + src_index);
+        nonzero += src[0] == zero ? zero : one;
+    }
+
+    if (lid >= WGS2_ALIGNED)
+        localmem[lid - WGS2_ALIGNED] = nonzero;
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    if (lid < WGS2_ALIGNED)
+        localmem[lid] = nonzero + localmem[lid];
+    barrier(CLK_LOCAL_MEM_FENCE);
+
+    for (int lsize = WGS2_ALIGNED >> 1; lsize > 0; lsize >>= 1)
+    {
+        if (lid < lsize)
+        {
+           int lid2 = lsize + lid;
+           localmem[lid] = localmem[lid] + localmem[lid2];
+        }
+        barrier(CLK_LOCAL_MEM_FENCE);
+    }
+
+    if (lid == 0)
+    {
+        __global int * dst = (__global int *)(dstptr + (int)sizeof(int) * gid);
+        dst[0] = localmem[0];
+    }
+}

modules/core/src/stat.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencl_kernels.hpp"
 #include <climits>
 #include <limits>
 
@@ -542,12 +543,51 @@ cv::Scalar cv::sum( InputArray _src )
     return s;
 }
 
+namespace cv {
+
+static bool ocl_countNonZero( InputArray _src, int & res )
+{
+    int depth = _src.depth();
+    bool doubleSupport = ocl::Device::getDefault().doubleFPConfig() > 0;
+
+    if (depth == CV_64F && !doubleSupport)
+        return false;
+
+    int dbsize = ocl::Device::getDefault().maxComputeUnits();
+    size_t wgs = ocl::Device::getDefault().maxWorkGroupSize();
+    UMat src = _src.getUMat(), db(1, dbsize, CV_32SC1);
+
+    int wgs2_aligned = 1;
+    while (wgs2_aligned < (int)wgs)
+        wgs2_aligned <<= 1;
+    wgs2_aligned >>= 1;
+
+    ocl::Kernel k("count_non_zero", ocl::core::count_non_zero_oclsrc,
+                  format("-D srcT=%s -D WGS=%d -D WGS2_ALIGNED=%d%s", ocl::typeToStr(src.type()), (int)wgs,
+                         wgs2_aligned, doubleSupport ? " -D DOUBLE_SUPPORT" : ""));
+    k.args(ocl::KernelArg::ReadOnlyNoSize(src), src.cols, (int)src.total(),
+           dbsize, ocl::KernelArg::PtrWriteOnly(db));
+
+    size_t globalsize = dbsize * wgs;
+    if (k.run(1, &globalsize, &wgs, true))
+        return res = cv::sum(db.getMat(ACCESS_READ))[0], true;
+    return false;
+}
+
+}
+
 int cv::countNonZero( InputArray _src )
 {
+    CV_Assert( _src.channels() == 1 );
+
+    int res = -1;
+    if (ocl::useOpenCL() && _src.isUMat() && ocl_countNonZero(_src, res))
+        return res;
+
     Mat src = _src.getMat();
     CountNonZeroFunc func = getCountNonZeroTab(src.depth());
 
-    CV_Assert( src.channels() == 1 && func != 0 );
+    CV_Assert( func != 0 );
 
     const Mat* arrays[] = {&src, 0};
     uchar* ptrs[1];

modules/core/test/ocl/test_arithm.cpp

@@ -969,10 +969,6 @@ OCL_TEST_P(Magnitude, Mat)
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Lut, Combine(::testing::Values(CV_8U, CV_8S), OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool(), Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Add, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Subtract, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
-OCL_INSTANTIATE_TEST_CASE_P(Arithm, Log, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
-OCL_INSTANTIATE_TEST_CASE_P(Arithm, Exp, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
-OCL_INSTANTIATE_TEST_CASE_P(Arithm, Phase, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
-OCL_INSTANTIATE_TEST_CASE_P(Arithm, Magnitude, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Mul, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Div, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Min, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
@@ -993,6 +989,10 @@ OCL_INSTANTIATE_TEST_CASE_P(Arithm, Repeat, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHAN
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, CountNonZero, Combine(OCL_ALL_DEPTHS, testing::Values(Channels(1)), Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, Sum, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
 OCL_INSTANTIATE_TEST_CASE_P(Arithm, MeanStdDev, Combine(OCL_ALL_DEPTHS, OCL_ALL_CHANNELS, Bool()));
+OCL_INSTANTIATE_TEST_CASE_P(Arithm, Log, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
+OCL_INSTANTIATE_TEST_CASE_P(Arithm, Exp, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
+OCL_INSTANTIATE_TEST_CASE_P(Arithm, Phase, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
+OCL_INSTANTIATE_TEST_CASE_P(Arithm, Magnitude, Combine(::testing::Values(CV_32F, CV_64F), OCL_ALL_CHANNELS, Bool()));
 
 } } // namespace cvtest::ocl