| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * Copyright (c) 2005 Robert Edele <yartrebo@earthlink.net> | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg is free software; you can redistribute it and/or | ||
| 7 | * modify it under the terms of the GNU Lesser General Public | ||
| 8 | * License as published by the Free Software Foundation; either | ||
| 9 | * version 2.1 of the License, or (at your option) any later version. | ||
| 10 | * | ||
| 11 | * FFmpeg is distributed in the hope that it will be useful, | ||
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
| 14 | * Lesser General Public License for more details. | ||
| 15 | * | ||
| 16 | * You should have received a copy of the GNU Lesser General Public | ||
| 17 | * License along with FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | #include "bbox.h" | ||
| 22 | |||
| 23 | #define BBOX(type, name) \ | ||
| 24 | static int bbox_##name(FFBoundingBox *bbox, \ | ||
| 25 | const type *data, int linesize, int w, int h, \ | ||
| 26 | int min_val) \ | ||
| 27 | { \ | ||
| 28 | int x, y; \ | ||
| 29 | int start_x; \ | ||
| 30 | int start_y; \ | ||
| 31 | int end_x; \ | ||
| 32 | int end_y; \ | ||
| 33 | const type *line; \ | ||
| 34 | \ | ||
| 35 | /* left bound */ \ | ||
| 36 | for (start_x = 0; start_x < w; start_x++) \ | ||
| 37 | for (y = 0; y < h; y++) \ | ||
| 38 | if ((data[y * linesize + start_x] > min_val)) \ | ||
| 39 | goto outl; \ | ||
| 40 | outl: \ | ||
| 41 | if (start_x == w) /* no points found */ \ | ||
| 42 | return 0; \ | ||
| 43 | \ | ||
| 44 | /* right bound */ \ | ||
| 45 | for (end_x = w - 1; end_x >= start_x; end_x--) \ | ||
| 46 | for (y = 0; y < h; y++) \ | ||
| 47 | if ((data[y * linesize + end_x] > min_val)) \ | ||
| 48 | goto outr; \ | ||
| 49 | outr: \ | ||
| 50 | \ | ||
| 51 | /* top bound */ \ | ||
| 52 | line = data; \ | ||
| 53 | for (start_y = 0; start_y < h; start_y++) { \ | ||
| 54 | for (x = 0; x < w; x++) \ | ||
| 55 | if (line[x] > min_val) \ | ||
| 56 | goto outt; \ | ||
| 57 | line += linesize; \ | ||
| 58 | } \ | ||
| 59 | outt: \ | ||
| 60 | \ | ||
| 61 | /* bottom bound */ \ | ||
| 62 | line = data + (h-1)*linesize; \ | ||
| 63 | for (end_y = h - 1; end_y >= start_y; end_y--) { \ | ||
| 64 | for (x = 0; x < w; x++) \ | ||
| 65 | if (line[x] > min_val) \ | ||
| 66 | goto outb; \ | ||
| 67 | line -= linesize; \ | ||
| 68 | } \ | ||
| 69 | outb: \ | ||
| 70 | \ | ||
| 71 | bbox->x1 = start_x; \ | ||
| 72 | bbox->y1 = start_y; \ | ||
| 73 | bbox->x2 = end_x; \ | ||
| 74 | bbox->y2 = end_y; \ | ||
| 75 | return 1; \ | ||
| 76 | } | ||
| 77 | |||
| 78 | ✗ | BBOX(uint8_t, 8) | |
| 79 | ✗ | BBOX(uint16_t, 16) | |
| 80 | |||
| 81 | ✗ | int ff_calculate_bounding_box(FFBoundingBox *bbox, | |
| 82 | const uint8_t *data, int linesize, | ||
| 83 | int w, int h, | ||
| 84 | int min_val, int depth) | ||
| 85 | { | ||
| 86 | ✗ | if (depth <= 8) | |
| 87 | ✗ | return bbox_8(bbox, data, linesize, w, h, min_val); | |
| 88 | else | ||
| 89 | ✗ | return bbox_16(bbox, (const uint16_t *)data, linesize / 2, w, h, min_val); | |
| 90 | } | ||
| 91 |