shithub: leaf

ref: 6e322e9033baed4027c8b3184c41fbc8df18b186
dir: /LEAF/Inc/leaf-envelopes.h/

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/*
 ==============================================================================
 
 leaf-envelopes.h
 Created: 20 Jan 2017 12:02:17pm
 Author:  Michael R Mulshine
 
 ==============================================================================
 */

#ifndef LEAF_ENVELOPES_H_INCLUDED
#define LEAF_ENVELOPES_H_INCLUDED

#ifdef __cplusplus
extern "C" {
#endif
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
#include "leaf-math.h"
#include "leaf-filters.h"
#include "leaf-delay.h"
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
    /* Attack-Decay envelope */
    typedef struct _tEnvelope {
        
        const float *exp_buff;
        const float *inc_buff;
        uint32_t buff_size;
        
        float next;
        
        float attackInc, decayInc, rampInc;
        
        oBool inAttack, inDecay, inRamp;
        
        oBool loop;
        
        float gain, rampPeak;
        
        float attackPhase, decayPhase, rampPhase;
        
    } _tEnvelope;
    
    typedef _tEnvelope* tEnvelope;
    
    void    tEnvelope_init      (tEnvelope* const, float attack, float decay, oBool loop);
    void    tEnvelope_free      (tEnvelope* const);
    
    float   tEnvelope_tick      (tEnvelope* const);
    void     tEnvelope_setAttack (tEnvelope*  const, float attack);
    void     tEnvelope_setDecay  (tEnvelope*  const, float decay);
    void     tEnvelope_loop      (tEnvelope*  const, oBool loop);
    void     tEnvelope_on        (tEnvelope*  const, float velocity);
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
    /* ADSR */
    typedef struct _tADSR
    {
        const float *exp_buff;
        const float *inc_buff;
        uint32_t buff_size;
        
        float next;
        
        float attackInc, decayInc, releaseInc, rampInc;
        
        oBool inAttack, inDecay, inSustain, inRelease, inRamp;
        
        float sustain, gain, rampPeak, releasePeak;
        
        float attackPhase, decayPhase, releasePhase, rampPhase;
        
    } _tADSR;
    
    typedef _tADSR* tADSR;
    
    void    tADSR_init      (tADSR*  const, float attack, float decay, float sustain, float release);
    void    tADSR_free      (tADSR*  const);
    
    float   tADSR_tick      (tADSR*  const);
    void    tADSR_setAttack (tADSR*  const, float attack);
    void    tADSR_setDecay  (tADSR*  const, float decay);
    void    tADSR_setSustain(tADSR*  const, float sustain);
    void    tADSR_setRelease(tADSR*  const, float release);
    void    tADSR_on        (tADSR*  const, float velocity);
    void    tADSR_off       (tADSR*  const);
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
    /* Ramp */
    typedef struct _tRamp {
        float inc;
        float inv_sr_ms;
        float minimum_time;
        float curr,dest;
        float time;
        int samples_per_tick;
        
    } _tRamp;
    
    typedef _tRamp* tRamp;
    
    void    tRamp_init      (tRamp* const, float time, int samplesPerTick);
    void    tRamp_free      (tRamp* const);
    
    float   tRamp_tick      (tRamp* const);
    float   tRamp_sample    (tRamp* const);
    void    tRamp_setTime   (tRamp* const, float time);
    void    tRamp_setDest   (tRamp* const, float dest);
    void    tRamp_setVal    (tRamp* const, float val);
    
    // ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~
    
    /* Exponential Smoother */
    typedef struct _tExpSmooth {
        float factor, oneminusfactor;
        float curr,dest;
        
    } _tExpSmooth;
    
    typedef _tExpSmooth* tExpSmooth;
    
    void    tExpSmooth_init      (tExpSmooth* const, float val, float factor);
    void    tExpSmooth_free      (tExpSmooth* const);
    
    float   tExpSmooth_tick      (tExpSmooth* const);
    float   tExpSmooth_sample    (tExpSmooth* const);
    void    tExpSmooth_setFactor   (tExpSmooth* const, float factor);
    void    tExpSmooth_setDest   (tExpSmooth* const, float dest);
    void    tExpSmooth_setVal    (tExpSmooth* const, float val);
    
#ifdef __cplusplus
}
#endif

#endif  // LEAF_ENVELOPES_H_INCLUDED