ref: 42bc0e304eef602cd288728a1dbe0b98694f5681
dir: /lib/spa/spa.h/
int spa_open(sp_data *sp, sp_audio *spa, const char *name, int mode); size_t spa_write_buf(sp_data *sp, sp_audio *spa, SPFLOAT *buf, uint32_t size); size_t spa_read_buf(sp_data *sp, sp_audio *spa, SPFLOAT *buf, uint32_t size); int spa_close(sp_audio *spa);