ref: 8a700fc7e0d8f2815e353de9aae8ad7b3594eb1a
dir: /h/wavout.h/
typedef struct sp_wavout sp_wavout; int sp_wavout_create(sp_wavout **p); int sp_wavout_destroy(sp_wavout **p); int sp_wavout_init(sp_data *sp, sp_wavout *p, const char *filename); int sp_wavout_compute(sp_data *sp, sp_wavout *p, SPFLOAT *in, SPFLOAT *out);