opencv/modules/cudaarithm/src/cuda/absdiff_scalar.cu

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#if !defined CUDA_DISABLER

#include "opencv2/core/cuda/common.hpp"
#include "opencv2/core/cuda/functional.hpp"
#include "opencv2/core/cuda/transform.hpp"
#include "opencv2/core/cuda/saturate_cast.hpp"
#include "opencv2/core/cuda/simd_functions.hpp"

#include "arithm_func_traits.hpp"

using namespace cv::cuda;
using namespace cv::cuda::device;

namespace arithm
{
    template <typename T, typename S> struct AbsDiffScalar : unary_function<T, T>
    {
        S val;

        __host__ explicit AbsDiffScalar(S val_) : val(val_) {}

        __device__ __forceinline__ T operator ()(T a) const
        {
            abs_func<S> f;
            return saturate_cast<T>(f(a - val));
        }
    };
}

namespace cv { namespace cuda { namespace device
{
    template <typename T, typename S> struct TransformFunctorTraits< arithm::AbsDiffScalar<T, S> > : arithm::ArithmFuncTraits<sizeof(T), sizeof(T)>
    {
    };
}}}

namespace arithm
{
    template <typename T, typename S>
    void absDiffScalar(PtrStepSzb src1, double val, PtrStepSzb dst, cudaStream_t stream)
    {
        AbsDiffScalar<T, S> op(static_cast<S>(val));

        device::transform((PtrStepSz<T>) src1, (PtrStepSz<T>) dst, op, WithOutMask(), stream);
    }

    template void absDiffScalar<uchar, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<schar, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<ushort, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<short, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<int, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<float, float>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
    template void absDiffScalar<double, double>(PtrStepSzb src1, double src2, PtrStepSzb dst, cudaStream_t stream);
}

#endif // CUDA_DISABLER