collection of audio DSP plugins
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/*
* Copyright (C) 2020 Alexandros Theodotou <alex at zrythm dot org>
*
* This file is part of ZPlugins
*
* ZPlugins is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* ZPlugins 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU General Affero Public License
* along with ZPlugins. If not, see <https://www.gnu.org/licenses/>.
*/
/**
* \file
*
* Math utilities.
*/
#ifndef __ZPLUGINS_MATH_UTILS_H__
#define __ZPLUGINS_MATH_UTILS_H__
#include <float.h>
#include <math.h>
#ifndef M_PI
# define M_PI 3.14159265358979323846
#endif
#ifndef powf
float powf (float dummy0, float dummy1);
#endif
#ifndef pow
double pow (double dummy0, double dummy1);
#endif
#ifndef sinf
float sinf (float dummy0);
#endif
static const float PI = (float) M_PI;
#ifndef MAX
# define MAX(x,y) (x > y ? x : y)
#endif
#ifndef MIN
# define MIN(x,y) (x < y ? x : y)
#endif
#ifndef CLAMP
# define CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
#endif
/**
* Rounds a float to a given type.
*/
#define math_round_float_to_type(x,type) \
((type) (x + 0.5f - (x < 0.f)))
/**
* Rounds a float to an int.
*/
#define math_round_float_to_int(x) \
math_round_float_to_type (x,int)
/**
* Checks if 2 floats are equal.
*/
#define math_floats_equal(a,b) \
((a) > (b) ? \
(a) - (b) < FLT_EPSILON : \
(b) - (a) < FLT_EPSILON)
/**
* Checks if 2 floats are equal.
*/
#define math_floats_equal_w_epsilon(a,b,epsilon) \
((a) > (b) ? \
(a) - (b) < epsilon : \
(b) - (a) < epsilon)
#define math_doubles_equal(a,b) \
(a > b ? a - b < DBL_EPSILON : b - a < DBL_EPSILON)
#endif