FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavdevice/fbdev_common.c
Date: 2024-04-20 14:10:07
Exec Total Coverage
Lines: 0 59 0.0%
Functions: 0 3 0.0%
Branches: 0 42 0.0%

Line Branch Exec Source
1 /*
2 * Copyright (c) 2011 Stefano Sabatini
3 * Copyright (c) 2009 Giliard B. de Freitas <giliarde@gmail.com>
4 * Copyright (C) 2002 Gunnar Monell <gmo@linux.nu>
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #include <unistd.h>
24 #include <fcntl.h>
25 #include <sys/ioctl.h>
26 #include <stdlib.h>
27 #include "fbdev_common.h"
28 #include "libavutil/common.h"
29 #include "libavutil/file_open.h"
30 #include "libavutil/mem.h"
31 #include "avdevice.h"
32
33 struct rgb_pixfmt_map_entry {
34 int bits_per_pixel;
35 int red_offset, green_offset, blue_offset, alpha_offset;
36 enum AVPixelFormat pixfmt;
37 };
38
39 static const struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {
40 // bpp, red_offset, green_offset, blue_offset, alpha_offset, pixfmt
41 { 32, 0, 8, 16, 24, AV_PIX_FMT_RGBA },
42 { 32, 16, 8, 0, 24, AV_PIX_FMT_BGRA },
43 { 32, 8, 16, 24, 0, AV_PIX_FMT_ARGB },
44 { 32, 3, 2, 8, 0, AV_PIX_FMT_ABGR },
45 { 24, 0, 8, 16, 0, AV_PIX_FMT_RGB24 },
46 { 24, 16, 8, 0, 0, AV_PIX_FMT_BGR24 },
47 { 16, 11, 5, 0, 0, AV_PIX_FMT_RGB565 },
48 };
49
50 enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)
51 {
52 int i;
53
54 for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) {
55 const struct rgb_pixfmt_map_entry *entry = &rgb_pixfmt_map[i];
56 if (entry->bits_per_pixel == varinfo->bits_per_pixel &&
57 entry->red_offset == varinfo->red.offset &&
58 entry->green_offset == varinfo->green.offset &&
59 entry->blue_offset == varinfo->blue.offset)
60 return entry->pixfmt;
61 }
62
63 return AV_PIX_FMT_NONE;
64 }
65
66 const char *ff_fbdev_default_device(void)
67 {
68 const char *dev = getenv("FRAMEBUFFER");
69 if (!dev)
70 dev = "/dev/fb0";
71 return dev;
72 }
73
74 int ff_fbdev_get_device_list(AVDeviceInfoList *device_list)
75 {
76 struct fb_var_screeninfo varinfo;
77 struct fb_fix_screeninfo fixinfo;
78 char device_file[12];
79 AVDeviceInfo *device = NULL;
80 int i, fd, ret = 0;
81 const char *default_device = ff_fbdev_default_device();
82
83 if (!device_list)
84 return AVERROR(EINVAL);
85
86 for (i = 0; i <= 31; i++) {
87 snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
88
89 if ((fd = avpriv_open(device_file, O_RDWR)) < 0) {
90 int err = AVERROR(errno);
91 if (err != AVERROR(ENOENT))
92 av_log(NULL, AV_LOG_ERROR, "Could not open framebuffer device '%s': %s\n",
93 device_file, av_err2str(err));
94 continue;
95 }
96 if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
97 goto fail_device;
98 if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
99 goto fail_device;
100
101 device = av_mallocz(sizeof(AVDeviceInfo));
102 if (!device) {
103 ret = AVERROR(ENOMEM);
104 goto fail_device;
105 }
106 device->device_name = av_strdup(device_file);
107 device->device_description = av_strdup(fixinfo.id);
108 if (!device->device_name || !device->device_description) {
109 ret = AVERROR(ENOMEM);
110 goto fail_device;
111 }
112
113 if ((ret = av_dynarray_add_nofree(&device_list->devices,
114 &device_list->nb_devices, device)) < 0)
115 goto fail_device;
116
117 if (default_device && !strcmp(device->device_name, default_device)) {
118 device_list->default_device = device_list->nb_devices - 1;
119 default_device = NULL;
120 }
121 close(fd);
122 continue;
123
124 fail_device:
125 if (device) {
126 av_freep(&device->device_name);
127 av_freep(&device->device_description);
128 av_freep(&device);
129 }
130 if (fd >= 0)
131 close(fd);
132 if (ret < 0)
133 return ret;
134 }
135 return 0;
136 }
137