| // Copyright (c) 2006, 2008 Edward Rosten | |
| // All rights reserved. | |
| // | |
| // Redistribution and use in source and binary forms, with or without | |
| // modification, are permitted provided that the following conditions | |
| // are met: | |
| // | |
| // *Redistributions of source code must retain the above copyright | |
| // notice, this list of conditions and the following disclaimer. | |
| // | |
| // *Redistributions in binary form must reproduce the above copyright | |
| // notice, this list of conditions and the following disclaimer in the | |
| // documentation and/or other materials provided with the distribution. | |
| // | |
| // *Neither the name of the University of Cambridge nor the names of | |
| // its contributors may be used to endorse or promote products derived | |
| // from this software without specific prior written permission. | |
| // | |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER | |
| // OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
| // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
| // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| // clang-format off | |
| #ifndef FAST_H | |
| #define FAST_H | |
| typedef struct { int x, y; } xy; | |
| typedef unsigned char byte; | |
| // Returns NULL on memory allocation failure. | |
| xy* aom_fast9_detect(const byte* im, int xsize, int ysize, int stride, int b, int* ret_num_corners); | |
| // If num_corners > 0, returns NULL on memory allocation failure. | |
| int* aom_fast9_score(const byte* i, int stride, const xy* corners, int num_corners, int b); | |
| // Sets *ret_num_corners to -1 (and returns NULL) on memory allocation failure. | |
| // Sets *ret_num_corners to 0 if nothing went wrong but no corners were found. | |
| xy* aom_fast9_detect_nonmax(const byte* im, int xsize, int ysize, int stride, int b, | |
| int** ret_scores, int* ret_num_corners); | |
| xy* aom_nonmax_suppression(const xy* corners, const int* scores, int num_corners, | |
| int** ret_scores, int* ret_num_nonmax); | |
| #endif | |
| // clang-format on |