ref: d8ddc90c497260a1f22cfbbc72c58ba1434eb366
dir: /modules/autowah.c/
#include <stdlib.h>
#include <math.h>
#include "soundpipe.h"
#include "CUI.h"
#define max(a,b) ((a < b) ? b : a)
#define min(a,b) ((a < b) ? a : b)
#ifndef FAUSTFLOAT
#define FAUSTFLOAT float
#endif
static float faustpower2_f(float value) {
return (value * value);
}
typedef struct {
float fRec0[3];
float fRec3[2];
float fRec2[2];
float fRec1[2];
float fRec4[2];
float fRec5[2];
FAUSTFLOAT fVslider0;
int fSamplingFreq;
int iConst0;
float fConst1;
float fConst2;
float fConst3;
float fConst4;
float fConst5;
float fConst6;
FAUSTFLOAT fVslider1;
FAUSTFLOAT fVslider2;
} autowah;
autowah* newautowah() {
autowah* dsp = (autowah*)malloc(sizeof(autowah));
return dsp;
}
void deleteautowah(autowah* dsp) {
free(dsp);
}
void instanceInitautowah(autowah* dsp, int samplingFreq) {
dsp->fSamplingFreq = samplingFreq;
dsp->fVslider0 = (FAUSTFLOAT)0.;
dsp->iConst0 = min(192000, max(1, dsp->fSamplingFreq));
dsp->fConst1 = (1413.72f / (float)dsp->iConst0);
dsp->fConst2 = exp((0.f - (100.f / (float)dsp->iConst0)));
dsp->fConst3 = (1.f - dsp->fConst2);
dsp->fConst4 = exp((0.f - (10.f / (float)dsp->iConst0)));
dsp->fConst5 = (1.f - dsp->fConst4);
/* C99 loop */
{
int i0;
for (i0 = 0; (i0 < 2); i0 = (i0 + 1)) {
dsp->fRec3[i0] = 0.f;
}
}
/* C99 loop */
{
int i1;
for (i1 = 0; (i1 < 2); i1 = (i1 + 1)) {
dsp->fRec2[i1] = 0.f;
}
}
dsp->fConst6 = (2827.43f / (float)dsp->iConst0);
/* C99 loop */
{
int i2;
for (i2 = 0; (i2 < 2); i2 = (i2 + 1)) {
dsp->fRec1[i2] = 0.f;
}
}
/* C99 loop */
{
int i3;
for (i3 = 0; (i3 < 2); i3 = (i3 + 1)) {
dsp->fRec4[i3] = 0.f;
}
}
dsp->fVslider1 = (FAUSTFLOAT)100.;
dsp->fVslider2 = (FAUSTFLOAT)0.1;
/* C99 loop */
{
int i4;
for (i4 = 0; (i4 < 2); i4 = (i4 + 1)) {
dsp->fRec5[i4] = 0.f;
}
}
/* C99 loop */
{
int i5;
for (i5 = 0; (i5 < 3); i5 = (i5 + 1)) {
dsp->fRec0[i5] = 0.f;
}
}
}
void initautowah(autowah* dsp, int samplingFreq) {
instanceInitautowah(dsp, samplingFreq);
}
void buildUserInterfaceautowah(autowah* dsp, UIGlue* interface) {
interface->addVerticalSlider(interface->uiInterface, "level", &dsp->fVslider2, 0.1f, 0.f, 1.f, 0.01f);
interface->addVerticalSlider(interface->uiInterface, "wah", &dsp->fVslider0, 0.f, 0.f, 1.f, 0.01f);
interface->addVerticalSlider(interface->uiInterface, "wet_dry", &dsp->fVslider1, 100.f, 0.f, 100.f, 1.f);
}
void computeautowah(autowah* dsp, int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs) {
FAUSTFLOAT* input0 = inputs[0];
FAUSTFLOAT* output0 = outputs[0];
float fSlow0 = (float)dsp->fVslider0;
float fSlow1 = (float)dsp->fVslider1;
float fSlow2 = (0.01f * (fSlow1 * (float)dsp->fVslider2));
float fSlow3 = ((1.f - (0.01f * fSlow1)) + (1.f - fSlow0));
/* C99 loop */
{
int i;
for (i = 0; (i < count); i = (i + 1)) {
float fTemp0 = (float)input0[i];
float fTemp1 = fabs(fTemp0);
dsp->fRec3[0] = max(fTemp1, ((dsp->fConst4 * dsp->fRec3[1]) + (dsp->fConst5 * fTemp1)));
dsp->fRec2[0] = ((dsp->fConst2 * dsp->fRec2[1]) + (dsp->fConst3 * dsp->fRec3[0]));
float fTemp2 = min(1.f, dsp->fRec2[0]);
float fTemp3 = pow(2.f, (2.3f * fTemp2));
float fTemp4 = (1.f - (dsp->fConst1 * (fTemp3 / pow(2.f, (1.f + (2.f * (1.f - fTemp2)))))));
dsp->fRec1[0] = ((0.999f * dsp->fRec1[1]) + (0.001f * (0.f - (2.f * (fTemp4 * cos((dsp->fConst6 * fTemp3)))))));
dsp->fRec4[0] = ((0.999f * dsp->fRec4[1]) + (0.001f * faustpower2_f(fTemp4)));
dsp->fRec5[0] = ((0.999f * dsp->fRec5[1]) + (0.0001f * pow(4.f, fTemp2)));
dsp->fRec0[0] = (0.f - (((dsp->fRec1[0] * dsp->fRec0[1]) + (dsp->fRec4[0] * dsp->fRec0[2])) - (fSlow2 * (dsp->fRec5[0] * fTemp0))));
output0[i] = (FAUSTFLOAT)((fSlow0 * (dsp->fRec0[0] - dsp->fRec0[1])) + (fSlow3 * fTemp0));
dsp->fRec3[1] = dsp->fRec3[0];
dsp->fRec2[1] = dsp->fRec2[0];
dsp->fRec1[1] = dsp->fRec1[0];
dsp->fRec4[1] = dsp->fRec4[0];
dsp->fRec5[1] = dsp->fRec5[0];
dsp->fRec0[2] = dsp->fRec0[1];
dsp->fRec0[1] = dsp->fRec0[0];
}
}
}
static void addVerticalSlider(void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
{
sp_autowah *p = ui_interface;
p->args[p->argpos] = zone;
p->argpos++;
}
int sp_autowah_create(sp_autowah **p)
{
*p = malloc(sizeof(sp_autowah));
return SP_OK;
}
int sp_autowah_destroy(sp_autowah **p)
{
sp_autowah *pp = *p;
autowah *dsp = pp->faust;
deleteautowah (dsp);
free(*p);
return SP_OK;
}
int sp_autowah_init(sp_data *sp, sp_autowah *p)
{
autowah *dsp = newautowah();
UIGlue UI;
p->argpos = 0;
UI.addVerticalSlider= addVerticalSlider;
UI.uiInterface = p;
buildUserInterfaceautowah(dsp, &UI);
initautowah(dsp, sp->sr);
p->level = p->args[0];
p->wah = p->args[1];
p->mix = p->args[2];
p->faust = dsp;
return SP_OK;
}
int sp_autowah_compute(sp_data *sp, sp_autowah *p, SPFLOAT *in, SPFLOAT *out)
{
autowah *dsp = p->faust;
SPFLOAT *faust_out[] = {out};
SPFLOAT *faust_in[] = {in};
computeautowah(dsp, 1, faust_in, faust_out);
return SP_OK;
}