ref: 29851f9c445d41cd82e422cb4b8c13fd2a13aea5
dir: /h/expon.h/
typedef struct { SPFLOAT a, dur, b; SPFLOAT val, incr; uint32_t sdur, stime; int init; } sp_expon; int sp_expon_create(sp_expon **p); int sp_expon_destroy(sp_expon **p); int sp_expon_init(sp_data *sp, sp_expon *p); int sp_expon_compute(sp_data *sp, sp_expon *p, SPFLOAT *in, SPFLOAT *out);