ref: 8a700fc7e0d8f2815e353de9aae8ad7b3594eb1a
dir: /h/blsaw.h/
typedef struct {
void *ud;
int argpos;
SPFLOAT *args[2];
SPFLOAT *freq;
SPFLOAT *amp;
} sp_blsaw;
int sp_blsaw_create(sp_blsaw **p);
int sp_blsaw_destroy(sp_blsaw **p);
int sp_blsaw_init(sp_data *sp, sp_blsaw *p);
int sp_blsaw_compute(sp_data *sp, sp_blsaw *p, SPFLOAT *in, SPFLOAT *out);