ref: 264e4718c21792ed8ee230d39aa2b9ac88d73b14
dir: /modules/blsaw.c/
/*
* Saw
*
* This code was generated by Faust. It utilizes the saw2 Faust
* module coded by Julius Smith. See oscillator.lib for more details.
*
*/
#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[2];
float fVec0[2];
float fVec1[2];
int fSamplingFreq;
int iConst0;
FAUSTFLOAT fHslider0;
FAUSTFLOAT fHslider1;
float fConst1;
float fConst2;
} blsaw;
blsaw* newblsaw() {
blsaw* dsp = (blsaw*)malloc(sizeof(blsaw));
return dsp;
}
void deleteblsaw(blsaw* dsp) {
free(dsp);
}
void instanceInitblsaw(blsaw* dsp, int samplingFreq) {
dsp->fSamplingFreq = samplingFreq;
dsp->iConst0 = min(192000, max(1, dsp->fSamplingFreq));
dsp->fHslider0 = (FAUSTFLOAT)1.;
dsp->fHslider1 = (FAUSTFLOAT)440.;
dsp->fConst1 = (float)dsp->iConst0;
dsp->fConst2 = (2.f / dsp->fConst1);
/* C99 loop */
{
int i0;
for (i0 = 0; (i0 < 2); i0 = (i0 + 1)) {
dsp->fRec0[i0] = 0.f;
}
}
/* C99 loop */
{
int i1;
for (i1 = 0; (i1 < 2); i1 = (i1 + 1)) {
dsp->fVec0[i1] = 0.f;
}
}
/* C99 loop */
{
int i2;
for (i2 = 0; (i2 < 2); i2 = (i2 + 1)) {
dsp->fVec1[i2] = 0.f;
}
}
}
void initblsaw(blsaw* dsp, int samplingFreq) {
instanceInitblsaw(dsp, samplingFreq);
}
void buildUserInterfaceblsaw(blsaw* dsp, UIGlue* interface) {
interface->addHorizontalSlider(interface->uiInterface, "freq", &dsp->fHslider1, 440.f, 0.f, 20000.f, 0.0001f);
interface->addHorizontalSlider(interface->uiInterface, "amp", &dsp->fHslider0, 1.f, 0.f, 1.f, 0.0001f);
}
void computeblsaw(blsaw* dsp, int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs) {
FAUSTFLOAT* output0 = outputs[0];
float fSlow0 = (float)dsp->fHslider1;
float fSlow1 = ((float)dsp->iConst0 * ((float)dsp->fHslider0 / fSlow0));
float fSlow2 = (dsp->fConst2 * fSlow0);
float fSlow3 = (dsp->fConst1 / fSlow0);
/* C99 loop */
{
int i;
for (i = 0; (i < count); i = (i + 1)) {
dsp->fRec0[0] = fmod((1.f + dsp->fRec0[1]), fSlow3);
float fTemp0 = faustpower2_f(((fSlow2 * dsp->fRec0[0]) - 1.f));
dsp->fVec0[0] = fTemp0;
dsp->fVec1[0] = 0.25f;
output0[i] = (FAUSTFLOAT)(fSlow1 * ((fTemp0 - dsp->fVec0[1]) * dsp->fVec1[1]));
dsp->fRec0[1] = dsp->fRec0[0];
dsp->fVec0[1] = dsp->fVec0[0];
dsp->fVec1[1] = dsp->fVec1[0];
}
}
}
static void addHorizontalSlider(void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step)
{
sp_blsaw *p = ui_interface;
p->args[p->argpos] = zone;
p->argpos++;
}
int sp_blsaw_create(sp_blsaw **p)
{
*p = malloc(sizeof(sp_blsaw));
return SP_OK;
}
int sp_blsaw_destroy(sp_blsaw **p)
{
sp_blsaw *pp = *p;
blsaw *dsp = pp->ud;
deleteblsaw (dsp);
free(*p);
return SP_OK;
}
int sp_blsaw_init(sp_data *sp, sp_blsaw *p)
{
blsaw *dsp = newblsaw();
UIGlue UI;
p->argpos = 0;
UI.addHorizontalSlider= addHorizontalSlider;
UI.uiInterface = p;
buildUserInterfaceblsaw(dsp, &UI);
initblsaw(dsp, sp->sr);
p->freq = p->args[0];
p->amp = p->args[1];
p->ud = dsp;
return SP_OK;
}
int sp_blsaw_compute(sp_data *sp, sp_blsaw *p, SPFLOAT *in, SPFLOAT *out)
{
blsaw *dsp = p->ud;
SPFLOAT out1 = 0;
SPFLOAT *faust_out[] = {&out1};
SPFLOAT *faust_in[] = {in};
computeblsaw(dsp, 1, faust_in, faust_out);
*out = out1;
return SP_OK;
}