1 /*
2 * Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
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 <stdio.h>
22 #include "libavutil/display.c"
23
print_matrix(int32_t matrix[9])24 static void print_matrix(int32_t matrix[9])
25 {
26 int i, j;
27
28 for (i = 0; i < 3; ++i) {
29 for (j = 0; j < 3 - 1; ++j)
30 printf("%d ", matrix[i*3 + j]);
31
32 printf("%d\n", matrix[i*3 + j]);
33 }
34 }
35
main(void)36 int main(void)
37 {
38 int32_t matrix[9];
39
40 // Set the matrix to 90 degrees
41 av_display_rotation_set(matrix, 90);
42 print_matrix(matrix);
43 printf("degrees: %f\n", av_display_rotation_get(matrix));
44
45 // Set the matrix to -45 degrees
46 av_display_rotation_set(matrix, -45);
47 print_matrix(matrix);
48 printf("degrees: %f\n", av_display_rotation_get(matrix));
49
50 // flip horizontal
51 av_display_matrix_flip(matrix, 1, 0);
52 print_matrix(matrix);
53 printf("degrees: %f\n", av_display_rotation_get(matrix));
54
55 // flip vertical
56 av_display_matrix_flip(matrix, 0, 1);
57 print_matrix(matrix);
58 printf("degrees: %f\n", av_display_rotation_get(matrix));
59
60 return 0;
61
62 }
63