ref: a8831f4d0fc4666d80e73b886ab2e60d176bb4a2
dir: /LEAF/Inc/leaf-vocoder.h/
/*==============================================================================
leaf-vocoder.h
Created: 20 Jan 2017 12:01:54pm
Author: Michael R Mulshine
==============================================================================*/
#ifndef LEAF_VOCODER_H_INCLUDED
#define LEAF_VOCODER_H_INCLUDED
#ifdef __cplusplus
extern "C" {
#endif
//==============================================================================
#include "leaf-globals.h"
#include "leaf-math.h"
//==============================================================================
/* tTalkbox */
#define NUM_TALKBOX_PARAM 4
#define TALKBOX_BUFFER_LENGTH 1024 // Every talkbox instance introduces 5 buffers of this size - was originally 1600
typedef struct _tTalkbox
{
float param[NUM_TALKBOX_PARAM];
///global internal variables
float car0[TALKBOX_BUFFER_LENGTH], car1[TALKBOX_BUFFER_LENGTH];
float window[TALKBOX_BUFFER_LENGTH];
float buf0[TALKBOX_BUFFER_LENGTH], buf1[TALKBOX_BUFFER_LENGTH];
float emphasis;
int32_t K, N, O, pos;
float wet, dry, FX;
float d0, d1, d2, d3, d4;
float u0, u1, u2, u3, u4;
} tTalkbox;
void tTalkbox_init (tTalkbox* const);
void tTalkbox_free (tTalkbox* const);
float tTalkbox_tick (tTalkbox* const, float synth, float voice);
void tTalkbox_update (tTalkbox* const);
void tTalkbox_suspend (tTalkbox* const);
void tTalkbox_lpcDurbin (float *r, int p, float *k, float *g);
void tTalkbox_lpc (float *buf, float *car, int32_t n, int32_t o);
void tTalkbox_setQuality (tTalkbox* const, float quality);
//==============================================================================
/* tVocoder */
#define NUM_VOCODER_PARAM 8
#define NBANDS 16
typedef struct _tVocoder
{
float param[NUM_VOCODER_PARAM];
float gain; //output level
float thru, high; //hf thru
float kout; //downsampled output
int32_t kval; //downsample counter
int32_t nbnd; //number of bands
//filter coeffs and buffers - seems it's faster to leave this global than make local copy
float f[NBANDS][13]; //[0-8][0 1 2 | 0 1 2 3 | 0 1 2 3 | val rate]
} tVocoder;
void tVocoder_init (tVocoder* const);
void tVocoder_free (tVocoder* const);
float tVocoder_tick (tVocoder* const, float synth, float voice);
void tVocoder_update (tVocoder* const);
void tVocoder_suspend (tVocoder* const);
//==============================================================================
#ifdef __cplusplus
}
#endif
#endif // LEAF_VOCODER_H_INCLUDED
//==============================================================================