ref: 42bc0e304eef602cd288728a1dbe0b98694f5681
dir: /h/samphold.h/
typedef struct {
SPFLOAT val;
} sp_samphold;
int sp_samphold_create(sp_samphold **p);
int sp_samphold_destroy(sp_samphold **p);
int sp_samphold_init(sp_data *sp, sp_samphold *p);
int sp_samphold_compute(sp_data *sp, sp_samphold *p, SPFLOAT *trig, SPFLOAT *in, SPFLOAT *out);