FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavutil/display.c
Date: 2024-02-16 17:37:06
Exec Total Coverage
Lines: 25 25 100.0%
Functions: 3 3 100.0%
Branches: 13 14 92.9%

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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 <stdint.h>
22 #include <string.h>
23 #include <math.h>
24
25 #include "display.h"
26 #include "libm.h"
27 #include "mathematics.h"
28
29 // fixed point to double
30 #define CONV_FP(x) ((double) (x)) / (1 << 16)
31
32 // double to fixed point
33 #define CONV_DB(x) (int32_t) ((x) * (1 << 16))
34
35 5284 double av_display_rotation_get(const int32_t matrix[9])
36 {
37 double rotation, scale[2];
38
39 5284 scale[0] = hypot(CONV_FP(matrix[0]), CONV_FP(matrix[3]));
40 5284 scale[1] = hypot(CONV_FP(matrix[1]), CONV_FP(matrix[4]));
41
42
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5284 if (scale[0] == 0.0 || scale[1] == 0.0)
43 5193 return NAN;
44
45 91 rotation = atan2(CONV_FP(matrix[1]) / scale[1],
46 91 CONV_FP(matrix[0]) / scale[0]) * 180 / M_PI;
47
48 91 return -rotation;
49 }
50
51 6 void av_display_rotation_set(int32_t matrix[9], double angle)
52 {
53 6 double radians = -angle * M_PI / 180.0f;
54 6 double c = cos(radians);
55 6 double s = sin(radians);
56
57 6 memset(matrix, 0, 9 * sizeof(int32_t));
58
59 6 matrix[0] = CONV_DB(c);
60 6 matrix[1] = CONV_DB(-s);
61 6 matrix[3] = CONV_DB(s);
62 6 matrix[4] = CONV_DB(c);
63 6 matrix[8] = 1 << 30;
64 6 }
65
66 5 void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip)
67 {
68 int i;
69
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5 const int flip[] = { 1 - 2 * (!!hflip), 1 - 2 * (!!vflip), 1 };
70
71
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5 if (hflip || vflip)
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20 for (i = 0; i < 9; i++)
73 18 matrix[i] *= flip[i % 3];
74 5 }
75