ref: a901d5647d30cf20fc0a096a612c58b2f99b8551
dir: /h/peaklim.h/
typedef struct {
SPFLOAT atk, rel, thresh;
SPFLOAT patk, prel;
SPFLOAT b0_r, a1_r, b0_a, a1_a, level;
} sp_peaklim;
int sp_peaklim_create(sp_peaklim **p);
int sp_peaklim_destroy(sp_peaklim **p);
int sp_peaklim_init(sp_data *sp, sp_peaklim *p);
int sp_peaklim_compute(sp_data *sp, sp_peaklim *p, SPFLOAT *in, SPFLOAT *out);