ref: 2e86b938c226edc0d8bd6c3855baf3bec02b5179
dir: /h/switch.h/
typedef struct {
SPFLOAT mode;
} sp_switch;
int sp_switch_create(sp_switch **p);
int sp_switch_destroy(sp_switch **p);
int sp_switch_init(sp_data *sp, sp_switch *p);
int sp_switch_compute(sp_data *sp, sp_switch *p, SPFLOAT *trig,
SPFLOAT *in1, SPFLOAT *in2, SPFLOAT *out);