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 int ff_calculate_bounding_box(FFBoundingBox *bbox,
24 const uint8_t *data, int linesize, int w, int h,
35 for (start_x = 0; start_x < w; start_x++)
36 for (y = 0; y < h; y++)
37 if ((data[y * linesize + start_x] > min_val))
40 if (start_x == w) /* no points found */
44 for (end_x = w - 1; end_x >= start_x; end_x--)
45 for (y = 0; y < h; y++)
46 if ((data[y * linesize + end_x] > min_val))
52 for (start_y = 0; start_y < h; start_y++) {
53 for (x = 0; x < w; x++)
54 if (line[x] > min_val)
61 line = data + (h-1)*linesize;
62 for (end_y = h - 1; end_y >= start_y; end_y--) {
63 for (x = 0; x < w; x++)
64 if (line[x] > min_val)