ref: 6f50522ff66bbebd9d899f71b6da71288c0a8d0d
dir: /h/smoother.h/
typedef struct{
SPFLOAT smooth;
SPFLOAT a1, b0, y0, psmooth;
SPFLOAT onedsr;
}sp_smoother;
int sp_smoother_create(sp_smoother **p);
int sp_smoother_destroy(sp_smoother **p);
int sp_smoother_init(sp_data *sp, sp_smoother *p);
int sp_smoother_compute(sp_data *sp, sp_smoother *p, SPFLOAT *in, SPFLOAT *out);
int sp_smoother_reset(sp_data *sp, sp_smoother *p, SPFLOAT *in);