/* This code is placed in the public domain. */ #include <stdlib.h>#include "soundpipe.h" int sp_samphold_create(sp_samphold **p){    *p = malloc(sizeof(sp_samphold));    return SP_OK;} int sp_samphold_destroy(sp_samphold **p){    free(*p);    return SP_OK;} int sp_samphold_init(sp_data *sp, sp_samphold *p){    USED(sp);     p->val = 0;    return SP_OK;} int sp_samphold_compute(sp_data *sp, sp_samphold *p, SPFLOAT *trig, SPFLOAT *in, SPFLOAT *out){    USED(sp);     if(*trig != 0) {        p->val = *in;    }    *out = p->val;    return SP_OK;}