int16_byte.h

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#pragma once
 
 
#include <stdint.h>
 
#ifdef USE_LIBDIVIDE
#include "src/libdivide/libdivide.h"
#endif
 
typedef uint8_t byte;
 
class int16_byte
{
public:
 
    constexpr int16_byte(uint8_t factor
#ifdef USE_LIBDIVIDE
    , const libdivide::libdivide_s16_t &divider
#endif
        )
        : _factor(factor)
#ifdef USE_LIBDIVIDE
        , _divider(divider)
#endif
    {
    }
 
#ifdef USE_LIBDIVIDE
    inline byte to_byte(int16_t value) const { return _factor==1 ? value : _factor==2 ? value>>1 : (byte)libdivide::libdivide_s16_do(value, &_divider); }
#else
    inline byte to_byte(int16_t value) const { return (byte)(value/_factor); }
#endif
    inline int16_t from_byte( byte in ) const { return (int16_t)in * _factor;  }
 
private:
    uint8_t _factor;
#ifdef USE_LIBDIVIDE
    libdivide::libdivide_s16_t _divider;
#endif
};