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
24static 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
36int 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