GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/bbox.c Lines: 0 6 0.0 %
Date: 2021-04-22 14:24:15 Branches: 0 54 0.0 %

Line Branch Exec Source
1
/*
2
 * Copyright (c) 2005 Robert Edele <yartrebo@earthlink.net>
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 "bbox.h"
22
23
#define BBOX(type, name)                                             \
24
static int bbox_##name(FFBoundingBox *bbox,                          \
25
                       const type *data, int linesize, int w, int h, \
26
                       int min_val)                                  \
27
{                                                                    \
28
    int x, y;                                                        \
29
    int start_x;                                                     \
30
    int start_y;                                                     \
31
    int end_x;                                                       \
32
    int end_y;                                                       \
33
    const type *line;                                                \
34
                                                                     \
35
    /* left bound */                                                 \
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))            \
39
                goto outl;                                           \
40
outl:                                                                \
41
    if (start_x == w) /* no points found */                          \
42
        return 0;                                                    \
43
                                                                     \
44
    /* right bound */                                                \
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))              \
48
                goto outr;                                           \
49
outr:                                                                \
50
                                                                     \
51
    /* top bound */                                                  \
52
    line = data;                                                     \
53
    for (start_y = 0; start_y < h; start_y++) {                      \
54
        for (x = 0; x < w; x++)                                      \
55
            if (line[x] > min_val)                                   \
56
                goto outt;                                           \
57
        line += linesize;                                            \
58
    }                                                                \
59
outt:                                                                \
60
                                                                     \
61
    /* bottom bound */                                               \
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)                                   \
66
                goto outb;                                           \
67
        line -= linesize;                                            \
68
    }                                                                \
69
outb:                                                                \
70
                                                                     \
71
    bbox->x1 = start_x;                                              \
72
    bbox->y1 = start_y;                                              \
73
    bbox->x2 = end_x;                                                \
74
    bbox->y2 = end_y;                                                \
75
    return 1;                                                        \
76
}
77
78
BBOX(uint8_t, 8)
79
BBOX(uint16_t, 16)
80
81
int ff_calculate_bounding_box(FFBoundingBox *bbox,
82
                              const uint8_t *data, int linesize,
83
                              int w, int h,
84
                              int min_val, int depth)
85
{
86
    if (depth <= 8)
87
        return bbox_8(bbox, data, linesize, w, h, min_val);
88
    else
89
        return bbox_16(bbox, (const uint16_t *)data, linesize / 2, w, h, min_val);
90
}