shithub: leaf

ref: 32b51e4078a2b84abcf5a9efbcb904b168ec1326
dir: /LEAF/Inc/leaf-delay.h/

/*==============================================================================

    leaf-delay.h
    Created: 20 Jan 2017 12:01:24pm
    Author:  Michael R Mulshine

==============================================================================*/

#ifndef LEAF_DELAY_H_INCLUDED
#define LEAF_DELAY_H_INCLUDED

#ifdef __cplusplus
extern "C" {
#endif

//==============================================================================
    
#include "leaf-globals.h"
#include "leaf-math.h"

//==============================================================================
    
/* Non-interpolating delay, reimplemented from STK (Cook and Scavone). */
typedef struct _tDelay
{
    float gain;
    float* buff;
    
    float lastOut, lastIn;
    
    uint32_t inPoint, outPoint;
    
    uint32_t delay, maxDelay;
    
} tDelay;

void        tDelay_init         (tDelay*  const, uint32_t delay, uint32_t maxDelay);
void        tDelay_free         (tDelay* const);

int         tDelay_setDelay     (tDelay*  const, uint32_t delay);
uint32_t    tDelay_getDelay     (tDelay*  const);
void        tDelay_tapIn        (tDelay*  const, float in, uint32_t tapDelay);
float       tDelay_tapOut       (tDelay*  const, uint32_t tapDelay);
float       tDelay_addTo        (tDelay*  const, float value, uint32_t tapDelay);
float       tDelay_tick         (tDelay*  const, float sample);
float       tDelay_getLastOut   (tDelay*  const);
float       tDelay_getLastIn    (tDelay*  const);

//==============================================================================
    
/* Linearly-interpolating delay, reimplemented from STK (Cook and Scavone). */
typedef struct _tDelayL
{
    float gain;
    float* buff;
    
    float lastOut, lastIn;
    
    uint32_t inPoint, outPoint;
    
    uint32_t maxDelay;
    
    float delay;
    
    float alpha, omAlpha;
    
} tDelayL;

void        tDelayL_init        (tDelayL*  const, float delay, uint32_t maxDelay);
void        tDelayL_free        (tDelayL* const);

int         tDelayL_setDelay    (tDelayL*  const, float delay);
float       tDelayL_getDelay    (tDelayL*  const);
void        tDelayL_tapIn       (tDelayL*  const, float in, uint32_t tapDelay);
float       tDelayL_tapOut      (tDelayL*  const, float tapDelay);
float       tDelayL_addTo       (tDelayL*  const, float value, uint32_t tapDelay);
float       tDelayL_tick        (tDelayL*  const, float sample);
float       tDelayL_getLastOut  (tDelayL*  const);
float       tDelayL_getLastIn   (tDelayL*  const);

//==============================================================================
    
/* Allpass-interpolating delay, reimplemented from STK (Cook and Scavone). */
typedef struct _tDelayA
{
    float gain;
    float* buff;
    
    float lastOut, lastIn;
    
    uint32_t inPoint, outPoint;
    
    uint32_t maxDelay;
    
    float delay;
    
    float alpha, omAlpha, coeff;
    
    float apInput;
    
} tDelayA;

void        tDelayA_init        (tDelayA*  const, float delay, uint32_t maxDelay);
void        tDelayA_free        (tDelayA* const);

int         tDelayA_setDelay    (tDelayA*  const, float delay);
float       tDelayA_getDelay    (tDelayA*  const);
void        tDelayA_tapIn       (tDelayA*  const, float in, uint32_t tapDelay);
float       tDelayA_tapOut      (tDelayA*  const, uint32_t tapDelay);
float       tDelayA_addTo       (tDelayA*  const, float value, uint32_t tapDelay);
float       tDelayA_tick        (tDelayA*  const, float sample);
float       tDelayA_getLastOut  (tDelayA*  const);
float       tDelayA_getLastIn   (tDelayA*  const);

//==============================================================================
    
/* Linear interpolating delay with fixed read and write pointers, variable rate. */
typedef struct _tTapeDelay
{
    float gain;
    float* buff;
    
    float lastOut, lastIn;
    
    uint32_t inPoint;
    
    uint32_t maxDelay;
    
    float delay, inc, idx;
    
    float apInput;
    
} tTapeDelay;

void        tTapeDelay_init        (tTapeDelay*  const, float delay, uint32_t maxDelay);
void        tTapeDelay_free        (tTapeDelay* const);

int         tTapeDelay_setDelay    (tTapeDelay*  const, float delay);
float       tTapeDelay_getDelay    (tTapeDelay*  const);
void        tTapeDelay_tapIn       (tTapeDelay*  const, float in, uint32_t tapDelay);
float       tTapeDelay_tapOut      (tTapeDelay* const d, float tapDelay);
float       tTapeDelay_addTo       (tTapeDelay*  const, float value, uint32_t tapDelay);
float       tTapeDelay_tick        (tTapeDelay*  const, float sample);
float       tTapeDelay_getLastOut  (tTapeDelay*  const);
float       tTapeDelay_getLastIn   (tTapeDelay*  const);
    
//==============================================================================
    
#ifdef __cplusplus
}
#endif

#endif  // LEAF_DELAY_H_INCLUDED

//==============================================================================