ref: 6dcc4aeffb487193bb072797444d354fd7ded848
dir: /LEAF/Inc/leaf-math.h/
/*==============================================================================
leaf-math.h
Created: 22 Jan 2017 7:02:56pm
Author: Michael R Mulshine
==============================================================================*/
#ifndef LEAF_MATH_H_INCLUDED
#define LEAF_MATH_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif
#include "leaf-global.h"
#include "math.h"
#include "stdint.h"
#include "stdlib.h"
//==============================================================================
//==============================================================================
typedef enum oBool
{
OTRUE = 1,
OFALSE = 0
}oBool;
// Allows for bitwise operations on floats
union unholy_t { /* a union between a float and an integer */
float f;
int i;
};
#define SQRT8 2.82842712475f
#define WSCALE 1.30612244898f
#define PI (3.14159265358979f)
#define TWO_PI (6.28318530717958f)
#define HALF_PI (1.570796326794897f)
#define VSF 1.0e-38f
#define MAX_DELAY 8192
#define INV_128 0.0078125f
#define INV_20 0.05f
#define INV_40 0.025f
#define INV_80 0.0125f
#define INV_160 0.00625f
#define INV_320 0.003125f
#define INV_640 0.0015625f
#define INV_1280 0.00078125f
#define INV_2560 0.000390625f
#define INV_5120 0.0001953125f
#define INV_10240 0.00009765625f
#define INV_20480 0.000048828125f
#define INV_TWELVE 0.0833333333f
#define INV_440 0.0022727273f
#define LOG2 0.3010299957f
#define INV_LOG2 3.321928095f
#define SOS_M 343.0f
#define TWO_TO_5 32.0f
#define INV_TWO_TO_5 0.03125f
#define TWO_TO_7 128.f
#define INV_TWO_TO_7 0.0078125f
#define TWO_TO_8 256.f
#define INV_TWO_TO_8 0.00390625f
#define TWO_TO_9 512.f
#define INV_TWO_TO_9 0.001953125f
#define TWO_TO_10 1024.f
#define INV_TWO_TO_10 0.0009765625f
#define TWO_TO_11 2048.f
#define INV_TWO_TO_11 0.00048828125f
#define TWO_TO_12 4096.f
#define INV_TWO_TO_12 0.00024414062f
#define TWO_TO_15 32768.f
#define TWO_TO_16 65536.f
#define INV_TWO_TO_15 0.00003051757f
#define INV_TWO_TO_16 0.00001525878f
#define TWO_TO_16_MINUS_ONE 65535.0f
#define TWO_TO_23 8388608.0f
#define INV_TWO_TO_23 0.00000011920929f
#define TWO_TO_31 2147483648.0f
#define INV_TWO_TO_31 0.000000000465661f
#define TWO_TO_32 4294967296.0f
#define INV_TWO_TO_32 0.000000000232831f
#define ONE_OVER_SQRT2 0.707106781186548f
#define LOGTEN 2.302585092994
// Jones shaper
float LEAF_shaper (float input, float m_drive);
float LEAF_reedTable (float input, float offset, float slope);
float LEAF_reduct (float input, float ratio);
float LEAF_round (float input, float rnd);
float LEAF_bitwise_xor(float input, uint32_t op);
float LEAF_reduct (float input, float ratio);
float LEAF_round (float input, float rnd);
float LEAF_bitwise_xor(float input, uint32_t op);
float LEAF_clip (float min, float val, float max);
int LEAF_clipInt (int min, int val, int max);
float LEAF_softClip (float val, float thresh);
oBool LEAF_isPrime (uint64_t number );
float LEAF_midiToFrequency (float f);
float LEAF_frequencyToMidi(float f);
void LEAF_generate_sine (float* buffer, int size);
void LEAF_generate_sawtooth (float* buffer, float basefreq, int size);
void LEAF_generate_triangle (float* buffer, float basefreq, int size);
void LEAF_generate_square (float* buffer, float basefreq, int size);
// dope af
float LEAF_chebyshevT(float in, int n);
float LEAF_CompoundChebyshevT(float in, int n, float* amps);
// Hermite interpolation
float LEAF_interpolate_hermite (float A, float B, float C, float D, float t);
float LEAF_interpolate_hermite_x(float yy0, float yy1, float yy2, float yy3, float xx);
float LEAF_interpolation_linear (float A, float B, float t);
float interpolate3max(float *buf, const int peakindex);
float interpolate3phase(float *buf, const int peakindex);
// alternative implementation for abs()
// REQUIRES: 32 bit integers
int fastabs_int(int in);
// alternative implementation for abs()
// REQUIRES: 32 bit floats
float fastabsf(float f);
float fastexp2f(float f);
float fastPowf(float a, float b) ;
double fastPow(double a, double b);
void LEAF_crossfade(float fade, float* volumes);
float LEAF_tanh(float x);
void LEAF_generate_sine(float* buffer, int size);
void LEAF_generate_sawtooth(float* buffer, float basefreq, int size);
void LEAF_generate_triangle(float* buffer, float basefreq, int size);
void LEAF_generate_square(float* buffer, float basefreq, int size);
//0.001 base gives a good curve that goes from 1 to near zero
//1000 gives a good curve from -1.0 to 0.0
void LEAF_generate_exp(float* buffer, float base, float start, float end, float offset, int size);
float LEAF_poly_blep(float t, float dt);
float LEAF_midiToFrequency(float f);
float fast_mtof(float f);
double fastexp(double x);
float fastexpf(float x);
double fasterexp(double x);
float fasterexpf(float x);
float mtof(float f);
float fast_mtof(float f);
float faster_mtof(float f);
float ftom(float f);
float powtodb(float f);
float rmstodb(float f);
float dbtopow(float f);
float dbtorms(float f);
float atodb(float a);
float dbtoa(float db);
float fastdbtoa(float db);
float maximum (float num1, float num2);
float minimum (float num1, float num2);
//==============================================================================
#ifdef __cplusplus
}
#endif
#endif // LEAF_MATH_H_INCLUDED
//==============================================================================