portapack-mayhem/firmware/common/complex.hpp

115 lines
2.7 KiB
C++

/*
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifndef __COMPLEX_H__
#define __COMPLEX_H__
#include <cstdint>
#include <complex>
#include <cmath>
constexpr float pi{3.141592653589793238462643383279502884f};
namespace std {
template <>
struct complex<int8_t> {
public:
typedef int8_t value_type;
typedef uint16_t rep_type;
constexpr complex(
int8_t re = 0,
int8_t im = 0)
: _v{re, im} {
}
constexpr int8_t real() const { return _v[0]; }
constexpr int8_t imag() const { return _v[1]; }
void real(int8_t v) { _v[0] = v; }
void imag(int8_t v) { _v[1] = v; }
constexpr uint16_t __rep() const {
return _rep;
}
private:
union {
value_type _v[2];
rep_type _rep;
};
};
template <>
struct complex<int16_t> {
public:
typedef int16_t value_type;
typedef uint32_t rep_type;
constexpr complex(
int16_t re = 0,
int16_t im = 0)
: _v{re, im} {
}
constexpr int16_t real() const { return _v[0]; }
constexpr int16_t imag() const { return _v[1]; }
void real(int16_t v) { _v[0] = v; }
void imag(int16_t v) { _v[1] = v; }
template <class X>
complex<int16_t>& operator+=(const complex<X>& other) {
_v[0] += other.real();
_v[1] += other.imag();
return *this;
}
constexpr uint32_t __rep() const {
return _rep;
}
constexpr operator std::complex<float>() const {
return {
static_cast<float>(_v[0]),
static_cast<float>(_v[1])};
}
private:
union {
value_type _v[2];
rep_type _rep;
};
};
} /* namespace std */
using complex8_t = std::complex<int8_t>;
using complex16_t = std::complex<int16_t>;
using complex32_t = std::complex<int32_t>;
static_assert(sizeof(complex8_t) == 2, "complex8_t size wrong");
static_assert(sizeof(complex16_t) == 4, "complex16_t size wrong");
static_assert(sizeof(complex32_t) == 8, "complex32_t size wrong");
#endif /*__COMPLEX_H__*/