|  | // clang-format off | 
|  | #ifndef FAST_H | 
|  | #define FAST_H | 
|  |  | 
|  | typedef struct { int x, y; } xy; | 
|  | typedef unsigned char byte; | 
|  |  | 
|  | int aom_fast9_corner_score(const byte* p, const int pixel[], int bstart); | 
|  |  | 
|  | xy* aom_fast9_detect(const byte* im, int xsize, int ysize, int stride, int b, int* ret_num_corners); | 
|  |  | 
|  | int* aom_fast9_score(const byte* i, int stride, xy* corners, int num_corners, int b); | 
|  |  | 
|  | xy* aom_fast9_detect_nonmax(const byte* im, int xsize, int ysize, int stride, int b, int* ret_num_corners); | 
|  |  | 
|  | xy* aom_nonmax_suppression(const xy* corners, const int* scores, int num_corners, int* ret_num_nonmax); | 
|  |  | 
|  |  | 
|  | #endif | 
|  | // clang-format on |