/* This code is placed in the public domain. */ #include <stdlib.h>#include "soundpipe.h" int sp_line_create(sp_line **p){ *p = malloc(sizeof(sp_line)); return SP_OK;} int sp_line_destroy(sp_line **p){ free(*p); return SP_OK;} static void line_reinit(sp_data *sp, sp_line *p){ SPFLOAT onedsr = 1.0 / sp->sr; p->incr = (SPFLOAT)((p->b - p->a) / (p->dur)) * onedsr; p->val = p->a; p->stime = 0; p->sdur = sp->sr * p->dur;} int sp_line_init(sp_data *sp, sp_line *p){ p->a = 0; p->dur = 0.5; p->b = 1; line_reinit(sp, p); p->init = 1; return SP_OK;} int sp_line_compute(sp_data *sp, sp_line *p, SPFLOAT *in, SPFLOAT *out){ if (*in != 0 ) { line_reinit(sp, p); p->init = 0; } if (p->init) { *out = 0; return SP_OK; } if (p->stime < p->sdur) { SPFLOAT val = p->val; p->val += p->incr; p->stime++; *out = val; } else { *out = p->b; } return SP_OK;}
/* This code is placed in the public domain. */
#include <stdlib.h>
#include "soundpipe.h"
int sp_line_create(sp_line **p)
{
*p = malloc(sizeof(sp_line));
return SP_OK;
}
int sp_line_destroy(sp_line **p)
{
free(*p);
return SP_OK;
}
static void line_reinit(sp_data *sp, sp_line *p)
{
SPFLOAT onedsr = 1.0 / sp->sr;
p->incr = (SPFLOAT)((p->b - p->a) / (p->dur)) * onedsr;
p->val = p->a;
p->stime = 0;
p->sdur = sp->sr * p->dur;
}
int sp_line_init(sp_data *sp, sp_line *p)
{
p->a = 0;
p->dur = 0.5;
p->b = 1;
line_reinit(sp, p);
p->init = 1;
return SP_OK;
}
int sp_line_compute(sp_data *sp, sp_line *p, SPFLOAT *in, SPFLOAT *out)
{
if (*in != 0 ) {
line_reinit(sp, p);
p->init = 0;
}
if (p->init) {
*out = 0;
return SP_OK;
}
if (p->stime < p->sdur) {
SPFLOAT val = p->val;
p->val += p->incr;
p->stime++;
*out = val;
} else {
*out = p->b;
}
return SP_OK;
}