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#ifndef __OPENCV_HAL_HPP__
#define __OPENCV_HAL_HPP__

#include "opencv2/hal/defs.h"

/**
  @defgroup hal Hardware Acceleration Layer
  @{
    @defgroup hal_intrin Universal intrinsics
    @{
      @defgroup hal_intrin_impl Private implementation helpers
    @}
    @defgroup hal_utils Platform-dependent utils
  @}
*/


namespace cv { namespace hal {

//! @addtogroup hal
//! @{

namespace Error {

enum
{
    Ok = 0,
    Unknown = -1
};

}

int normHamming(const uchar* a, int n);
int normHamming(const uchar* a, const uchar* b, int n);

int normHamming(const uchar* a, int n, int cellSize);
int normHamming(const uchar* a, const uchar* b, int n, int cellSize);

//////////////////////////////// low-level functions ////////////////////////////////

int LU(float* A, size_t astep, int m, float* b, size_t bstep, int n);
int LU(double* A, size_t astep, int m, double* b, size_t bstep, int n);
bool Cholesky(float* A, size_t astep, int m, float* b, size_t bstep, int n);
bool Cholesky(double* A, size_t astep, int m, double* b, size_t bstep, int n);

int normL1_(const uchar* a, const uchar* b, int n);
float normL1_(const float* a, const float* b, int n);
float normL2Sqr_(const float* a, const float* b, int n);

void exp(const float* src, float* dst, int n);
void exp(const double* src, double* dst, int n);
void log(const float* src, float* dst, int n);
void log(const double* src, double* dst, int n);

void fastAtan2(const float* y, const float* x, float* dst, int n, bool angleInDegrees);
void magnitude(const float* x, const float* y, float* dst, int n);
void magnitude(const double* x, const double* y, double* dst, int n);
void sqrt(const float* src, float* dst, int len);
void sqrt(const double* src, double* dst, int len);
void invSqrt(const float* src, float* dst, int len);
void invSqrt(const double* src, double* dst, int len);

//! @}

}} //cv::hal

#endif //__OPENCV_HAL_HPP__