ref: f2e11903bc2d80a73e21916e2929a18b6042c5f6
dir: /h/brown.h/
typedef struct { SPFLOAT brown; } sp_brown; int sp_brown_create(sp_brown **p); int sp_brown_destroy(sp_brown **p); int sp_brown_init(sp_data *sp, sp_brown *p); int sp_brown_compute(sp_data *sp, sp_brown *p, SPFLOAT *in, SPFLOAT *out);