ref: d8ddc90c497260a1f22cfbbc72c58ba1434eb366
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);