#include <math.h>#include <stdlib.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 fVec2[4096];	int iVec0[2];	float fRec1[2];	float fVec1[2];	float fRec0[2];	int fSamplingFreq;	int iConst0;	float fConst1;	FAUSTFLOAT fHslider0;	FAUSTFLOAT fHslider1;	float fConst2;	float fConst3;	float fConst4;	float fConst5;	int IOTA; } bltriangle; bltriangle* newbltriangle(void) {	bltriangle* dsp = (bltriangle*)malloc(sizeof(bltriangle));	return dsp;} void deletebltriangle(bltriangle* dsp) {	free(dsp);} void instanceInitbltriangle(bltriangle* dsp, int samplingFreq) {	dsp->fSamplingFreq = samplingFreq;	/* C99 loop */	{		int i0;		for (i0 = 0; (i0 < 2); i0 = (i0 + 1)) {			dsp->iVec0[i0] = 0; 		} 	}	dsp->iConst0 = min(192000, max(1, dsp->fSamplingFreq));	dsp->fConst1 = (4.f / (float)dsp->iConst0);	dsp->fHslider0 = (FAUSTFLOAT)440.;	dsp->fHslider1 = (FAUSTFLOAT)1.;	dsp->fConst2 = (float)dsp->iConst0;	dsp->fConst3 = (0.5f * dsp->fConst2);	dsp->fConst4 = (0.25f * dsp->fConst2);	dsp->fConst5 = (1.f / dsp->fConst2);	/* C99 loop */	{		int i1;		for (i1 = 0; (i1 < 2); i1 = (i1 + 1)) {			dsp->fRec1[i1] = 0.f; 		} 	}	/* C99 loop */	{		int i2;		for (i2 = 0; (i2 < 2); i2 = (i2 + 1)) {			dsp->fVec1[i2] = 0.f; 		} 	}	dsp->IOTA = 0;	/* C99 loop */	{		int i3;		for (i3 = 0; (i3 < 4096); i3 = (i3 + 1)) {			dsp->fVec2[i3] = 0.f; 		} 	}	/* C99 loop */	{		int i4;		for (i4 = 0; (i4 < 2); i4 = (i4 + 1)) {			dsp->fRec0[i4] = 0.f; 		} 	} } void initbltriangle(bltriangle* dsp, int samplingFreq) {	instanceInitbltriangle(dsp, samplingFreq);} void buildUserInterfacebltriangle(bltriangle* dsp, UIGlue* interface) {	interface->addHorizontalSlider(interface->uiInterface, "freq", &dsp->fHslider0, 440.f, 0.f, 20000.f, 0.0001f);	interface->addHorizontalSlider(interface->uiInterface, "amp", &dsp->fHslider1, 1.f, 0.f, 1.f, 1e-05f);} void computebltriangle(bltriangle* dsp, int count, FAUSTFLOAT** inputs, FAUSTFLOAT** outputs) {    USED(inputs); 	FAUSTFLOAT* output0 = outputs[0];	float fSlow0 = (float)dsp->fHslider0;	float fSlow1 = (dsp->fConst1 * (fSlow0 * (float)dsp->fHslider1));	float fSlow2 = max(fSlow0, 23.4489f);	float fSlow3 = max(0.f, min(2047.f, (dsp->fConst3 / fSlow2)));	int iSlow4 = (int)fSlow3;	int iSlow5 = (1 + iSlow4);	float fSlow6 = ((float)iSlow5 - fSlow3);	float fSlow7 = (dsp->fConst4 / fSlow2);	float fSlow8 = (dsp->fConst5 * fSlow2);	float fSlow9 = (fSlow3 - (float)iSlow4);	/* C99 loop */	{		int i;		for (i = 0; (i < count); i = (i + 1)) {			dsp->iVec0[0] = 1;			dsp->fRec1[0] = fmodf((dsp->fRec1[1] + fSlow8), 1.f);			float fTemp0 = faustpower2_f(((2.f * dsp->fRec1[0]) - 1.f));			dsp->fVec1[0] = fTemp0;			float fTemp1 = (fSlow7 * ((fTemp0 - dsp->fVec1[1]) * (float)dsp->iVec0[1]));			dsp->fVec2[(dsp->IOTA & 4095)] = fTemp1;			dsp->fRec0[0] = (0.f - (((fSlow6 * dsp->fVec2[((dsp->IOTA - iSlow4) & 4095)]) + (fSlow9 * dsp->fVec2[((dsp->IOTA - iSlow5) & 4095)])) - ((0.999f * dsp->fRec0[1]) + fTemp1)));			output0[i] = (FAUSTFLOAT)(fSlow1 * dsp->fRec0[0]);			dsp->iVec0[1] = dsp->iVec0[0];			dsp->fRec1[1] = dsp->fRec1[0];			dsp->fVec1[1] = dsp->fVec1[0];			dsp->IOTA = (dsp->IOTA + 1);			dsp->fRec0[1] = dsp->fRec0[0]; 		} 	} } static void addHorizontalSlider(void* ui_interface, const char* label, FAUSTFLOAT* zone, FAUSTFLOAT init, FAUSTFLOAT min, FAUSTFLOAT max, FAUSTFLOAT step){    USED(label, init, min, max, step);     sp_bltriangle *p = ui_interface;    p->args[p->argpos] = zone;    p->argpos++;} int sp_bltriangle_create(sp_bltriangle **p){    *p = malloc(sizeof(sp_bltriangle));    return SP_OK;} int sp_bltriangle_destroy(sp_bltriangle **p){    sp_bltriangle *pp = *p;    bltriangle *dsp = pp->ud;    deletebltriangle (dsp);    free(*p);    return SP_OK;} int sp_bltriangle_init(sp_data *sp, sp_bltriangle *p){    bltriangle *dsp = newbltriangle(); UIGlue UI;    p->argpos = 0;    UI.addHorizontalSlider= addHorizontalSlider;    UI.uiInterface = p;    buildUserInterfacebltriangle(dsp, &UI);    initbltriangle(dsp, sp->sr);      p->freq = p->args[0];    p->amp = p->args[1];     p->ud = dsp;    return SP_OK;} int sp_bltriangle_compute(sp_data *sp, sp_bltriangle *p, SPFLOAT *in, SPFLOAT *out){    USED(sp);     bltriangle *dsp = p->ud;    SPFLOAT out1 = 0;    SPFLOAT *faust_out[] = {&out1};    SPFLOAT *faust_in[] = {in};    computebltriangle(dsp, 1, faust_in, faust_out);     *out = out1;    return SP_OK;}