2 * Copyright (c) 2005 Robert Edele <yartrebo@earthlink.net>
4 * This file is part of FFmpeg.
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.
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.
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
23 #define BBOX(type, name) \
24 static int bbox_##name(FFBoundingBox *bbox, \
25 const type *data, int linesize, int w, int h, \
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)) \
41 if (start_x == w) /* no points found */ \
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)) \
53 for (start_y = 0; start_y < h; start_y++) { \
54 for (x = 0; x < w; x++) \
55 if (line[x] > min_val) \
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) \
81 int ff_calculate_bounding_box(FFBoundingBox *bbox,
82 const uint8_t *data, int linesize,
84 int min_val, int depth)
87 return bbox_8(bbox, data, linesize, w, h, min_val);
89 return bbox_16(bbox, (const uint16_t *)data, linesize / 2, w, h, min_val);