FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavdevice/fbdev_common.c
Date: 2022-12-06 04:36:11
Exec Total Coverage
Lines: 0 58 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 "avdevice.h"
31
32 struct rgb_pixfmt_map_entry {
33 int bits_per_pixel;
34 int red_offset, green_offset, blue_offset, alpha_offset;
35 enum AVPixelFormat pixfmt;
36 };
37
38 static const struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {
39 // bpp, red_offset, green_offset, blue_offset, alpha_offset, pixfmt
40 { 32, 0, 8, 16, 24, AV_PIX_FMT_RGBA },
41 { 32, 16, 8, 0, 24, AV_PIX_FMT_BGRA },
42 { 32, 8, 16, 24, 0, AV_PIX_FMT_ARGB },
43 { 32, 3, 2, 8, 0, AV_PIX_FMT_ABGR },
44 { 24, 0, 8, 16, 0, AV_PIX_FMT_RGB24 },
45 { 24, 16, 8, 0, 0, AV_PIX_FMT_BGR24 },
46 { 16, 11, 5, 0, 0, AV_PIX_FMT_RGB565 },
47 };
48
49 enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)
50 {
51 int i;
52
53 for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) {
54 const struct rgb_pixfmt_map_entry *entry = &rgb_pixfmt_map[i];
55 if (entry->bits_per_pixel == varinfo->bits_per_pixel &&
56 entry->red_offset == varinfo->red.offset &&
57 entry->green_offset == varinfo->green.offset &&
58 entry->blue_offset == varinfo->blue.offset)
59 return entry->pixfmt;
60 }
61
62 return AV_PIX_FMT_NONE;
63 }
64
65 const char* ff_fbdev_default_device()
66 {
67 const char *dev = getenv("FRAMEBUFFER");
68 if (!dev)
69 dev = "/dev/fb0";
70 return dev;
71 }
72
73 int ff_fbdev_get_device_list(AVDeviceInfoList *device_list)
74 {
75 struct fb_var_screeninfo varinfo;
76 struct fb_fix_screeninfo fixinfo;
77 char device_file[12];
78 AVDeviceInfo *device = NULL;
79 int i, fd, ret = 0;
80 const char *default_device = ff_fbdev_default_device();
81
82 if (!device_list)
83 return AVERROR(EINVAL);
84
85 for (i = 0; i <= 31; i++) {
86 snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
87
88 if ((fd = avpriv_open(device_file, O_RDWR)) < 0) {
89 int err = AVERROR(errno);
90 if (err != AVERROR(ENOENT))
91 av_log(NULL, AV_LOG_ERROR, "Could not open framebuffer device '%s': %s\n",
92 device_file, av_err2str(err));
93 continue;
94 }
95 if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
96 goto fail_device;
97 if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
98 goto fail_device;
99
100 device = av_mallocz(sizeof(AVDeviceInfo));
101 if (!device) {
102 ret = AVERROR(ENOMEM);
103 goto fail_device;
104 }
105 device->device_name = av_strdup(device_file);
106 device->device_description = av_strdup(fixinfo.id);
107 if (!device->device_name || !device->device_description) {
108 ret = AVERROR(ENOMEM);
109 goto fail_device;
110 }
111
112 if ((ret = av_dynarray_add_nofree(&device_list->devices,
113 &device_list->nb_devices, device)) < 0)
114 goto fail_device;
115
116 if (default_device && !strcmp(device->device_name, default_device)) {
117 device_list->default_device = device_list->nb_devices - 1;
118 default_device = NULL;
119 }
120 close(fd);
121 continue;
122
123 fail_device:
124 if (device) {
125 av_freep(&device->device_name);
126 av_freep(&device->device_description);
127 av_freep(&device);
128 }
129 if (fd >= 0)
130 close(fd);
131 if (ret < 0)
132 return ret;
133 }
134 return 0;
135 }
136