absdiff_scalar.cu 3.91 KB
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/*M///////////////////////////////////////////////////////////////////////////////////////
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//
//                           License Agreement
//                For Open Source Computer Vision Library
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// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Third party copyrights are property of their respective owners.
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#include "opencv2/opencv_modules.hpp"

#ifndef HAVE_OPENCV_CUDEV

#error "opencv_cudev is required"

#else

#include "opencv2/cudev.hpp"

using namespace cv::cudev;

void absDiffScalar(const GpuMat& src, cv::Scalar val, bool, GpuMat& dst, const GpuMat&, double, Stream& stream, int);

namespace
{
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    template <typename T, typename S> struct AbsDiffScalarOp : unary_function<T, T>
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    {
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        S val;
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        __device__ __forceinline__ T operator ()(T a) const
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        {
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            abs_func<S> f;
            return saturate_cast<T>(f(a - val));
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        }
    };

    template <typename ScalarDepth> struct TransformPolicy : DefaultTransformPolicy
    {
    };
    template <> struct TransformPolicy<double> : DefaultTransformPolicy
    {
        enum {
            shift = 1
        };
    };

    template <typename SrcType, typename ScalarDepth>
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    void absDiffScalarImpl(const GpuMat& src, double value, GpuMat& dst, Stream& stream)
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    {
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        AbsDiffScalarOp<SrcType, ScalarDepth> op;
        op.val = static_cast<ScalarDepth>(value);
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        gridTransformUnary_< TransformPolicy<ScalarDepth> >(globPtr<SrcType>(src), globPtr<SrcType>(dst), op, stream);
    }
}

void absDiffScalar(const GpuMat& src, cv::Scalar val, bool, GpuMat& dst, const GpuMat&, double, Stream& stream, int)
{
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    typedef void (*func_t)(const GpuMat& src, double val, GpuMat& dst, Stream& stream);
    static const func_t funcs[] =
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    {
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        absDiffScalarImpl<uchar, float>,
        absDiffScalarImpl<schar, float>,
        absDiffScalarImpl<ushort, float>,
        absDiffScalarImpl<short, float>,
        absDiffScalarImpl<int, float>,
        absDiffScalarImpl<float, float>,
        absDiffScalarImpl<double, double>
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    };

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    const int depth = src.depth();
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    CV_DbgAssert( depth <= CV_64F );
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    funcs[depth](src, val[0], dst, stream);
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}

#endif