samphold
Files: samphold.h, samphold.c
Classic sample and hold
sp_samphold_create(sp_samphold **samphold)
sp_samphold_init(sp_data *sp, sp_samphold *samphold)
sp_samphold_compute(sp_data *sp, sp_samphold *samphold, SPFLOAT *trig, SPFLOAT *input, SPFLOAT *out)
sp_samphold_destroy(sp_samphold **samphold)
Inputs
trig: Will hold the current input value when non-zero.
input: Audio input.
Outputs
out: Signal output.
Example Code
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include "soundpipe.h"
typedef struct {
sp_samphold *samphold;
sp_osc *osc;
sp_ftbl *ft;
sp_metro *met;
sp_noise *noise;
} UserData;
void process(sp_data *sp, void *udata) {
UserData *ud = udata;
SPFLOAT osc = 0, samphold = 0, met = 0, noise = 0;
sp_metro_compute(sp, ud->met, NULL, &met);
sp_noise_compute(sp, ud->noise, NULL, &noise);
sp_samphold_compute(sp, ud->samphold, &met, &noise, &samphold);
ud->osc->freq = 200 + (samphold + 1) * 300;
sp_osc_compute(sp, ud->osc, NULL, &osc);
sp->out[0] = osc;
}
int main() {
srand(1234567);
UserData ud;
sp_data *sp;
sp_create(&sp);
sp_samphold_create(&ud.samphold);
sp_osc_create(&ud.osc);
sp_ftbl_create(sp, &ud.ft, 2048);
sp_metro_create(&ud.met);
sp_noise_create(&ud.noise);
sp_samphold_init(sp, ud.samphold);
sp_gen_sine(sp, ud.ft);
sp_osc_init(sp, ud.osc, ud.ft, 0);
sp_metro_init(sp, ud.met);
ud.met->freq = 5;
sp_noise_init(sp, ud.noise);
ud.noise->amp = 1;
sp->len = 44100 * 5;
sp_process(sp, &ud, process);
sp_samphold_destroy(&ud.samphold);
sp_ftbl_destroy(&ud.ft);
sp_osc_destroy(&ud.osc);
sp_metro_destroy(&ud.met);
sp_noise_destroy(&ud.noise);
sp_destroy(&sp);
return 0;
}