added cv::LUT to T-API

modules/core/src/convert.cpp

@@ -41,6 +41,7 @@
 //M*/
 
 #include "precomp.hpp"
+#include "opencl_kernels.hpp"
 
 namespace cv
 {
@@ -1209,16 +1210,45 @@ static LUTFunc lutTab[] =
 
 }
 
+namespace cv {
+
+static bool ocl_LUT(InputArray _src, InputArray _lut, OutputArray _dst)
+{
+    int dcn = _dst.channels(), lcn = _lut.channels(), dtype = _dst.type();
+
+    if (_src.dims() > 2)
+        return false;
+
+    UMat src = _src.getUMat(), lut = _lut.getUMat();
+    _dst.create(src.size(), dtype);
+    UMat dst = _dst.getUMat();
+
+    ocl::Kernel k("LUT", ocl::core::lut_oclsrc,
+                  format("-D dcn=%d -D lcn=%d -D srcT=%s -D dstT=%s", dcn, lcn,
+                         ocl::typeToStr(src.depth()), ocl::typeToStr(dst.depth())));
+    k.args(ocl::KernelArg::ReadOnlyNoSize(src), ocl::KernelArg::ReadOnlyNoSize(lut),
+           ocl::KernelArg::WriteOnly(dst));
+
+    size_t globalSize[2] = { dst.cols, dst.rows };
+    return k.run(2, globalSize, NULL, false);
+}
+
+} // cv
+
 void cv::LUT( InputArray _src, InputArray _lut, OutputArray _dst )
 {
-    Mat src = _src.getMat(), lut = _lut.getMat();
-    int cn = src.channels();
-    int lutcn = lut.channels();
+    int cn = _src.channels(), depth = _src.depth();
+    int lutcn = _lut.channels();
 
     CV_Assert( (lutcn == cn || lutcn == 1) &&
-        lut.total() == 256 && lut.isContinuous() &&
-        (src.depth() == CV_8U || src.depth() == CV_8S) );
-    _dst.create( src.dims, src.size, CV_MAKETYPE(lut.depth(), cn));
+        _lut.total() == 256 && _lut.isContinuous() &&
+        (depth == CV_8U || depth == CV_8S) );
+
+    if (ocl::useOpenCL() && _dst.isUMat() && ocl_LUT(_src, _lut, _dst))
+        return;
+
+    Mat src = _src.getMat(), lut = _lut.getMat();
+    _dst.create(src.dims, src.size, CV_MAKETYPE(_lut.depth(), cn));
     Mat dst = _dst.getMat();
 
     LUTFunc func = lutTab[lut.depth()];

modules/core/src/opencl/lut.cl

@@ -0,0 +1,71 @@
+//                           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
+//    Niko Li, newlife20080214@gmail.com
+//    Rock Li, Rock.li@amd.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
+
+__kernel void LUT(__global const uchar * srcptr, int src_step, int src_offset,
+                  __global const uchar * lutptr, int lut_step, int lut_offset,
+                  __global uchar * dstptr, int dst_step, int dst_offset, int rows, int cols)
+{
+    int x = get_global_id(0);
+    int y = get_global_id(1);
+
+    if (x < cols && y < rows)
+    {
+        int src_index = mad24(y, src_step, src_offset + x * (int)sizeof(srcT) * dcn);
+        int dst_index = mad24(y, dst_step, dst_offset + x * (int)sizeof(dstT) * dcn);
+
+        __global const srcT * src = (__global const srcT *)(srcptr + src_index);
+        __global const dstT * lut = (__global const dstT *)(lutptr + lut_offset);
+        __global dstT * dst = (__global dstT *)(dstptr + dst_index);
+
+#if lcn == 1
+        #pragma unroll
+        for (int cn = 0; cn < dcn; ++cn)
+            dst[cn] = lut[src[cn]];
+#else
+        #pragma unroll
+        for (int cn = 0; cn < dcn; ++cn)
+            dst[cn] = lut[src[cn] * dcn + cn];
+#endif
+    }
+}