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/* -----------------------------------------------------------------------------
*
* Monocasual Utils
*
* -----------------------------------------------------------------------------
*
* Copyright (C) 2021-2025 Giovanni A. Zuliani | Monocasual
*
* This file is part of Monocasual Utils.
*
* Monocasual Utils 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 3 of the License, or (at your option) any later version.
*
* Monocasual Utils 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 Giada - Monocasual Utils. If not, see
* <http://www.gnu.org/licenses/>.
*
* -------------------------------------------------------------------------- */
#ifndef MONOCASUAL_UTILS_MATH_H
#define MONOCASUAL_UTILS_MATH_H
#include <type_traits>
namespace mcl::utils::math
{
float linearToDB(float f);
float dBtoLinear(float f);
int quantize(int x, int step);
/* -------------------------------------------------------------------------- */
/* map (1)
Maps 'x' in range [a, b] to a new range [w, z]. Source:
https://en.wikipedia.org/wiki/Linear_equation#Two-point_form*/
template <typename TI, typename TO>
constexpr TO map(TI x, TI a, TI b, TO w, TO z)
{
static_assert(std::is_arithmetic_v<TI>);
static_assert(std::is_arithmetic_v<TO>);
if (a == b) // Prevents division by zero (undefined behavior)
return x;
return (((x - a) / (double)(b - a)) * (z - w)) + w;
}
/* map (2)
Maps 'x' in range [0, b) to a new range [0, z]. */
template <typename TI, typename TO>
constexpr TO map(TI x, TI b, TO z)
{
return map(x, static_cast<TI>(0), b, static_cast<TO>(0), z);
}
} // namespace mcl::utils::math
#endif
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