| /* |
| * Copyright (c) 2011 Stefano Sabatini |
| * Copyright (c) 2009 Giliard B. de Freitas <giliarde@gmail.com> |
| * Copyright (C) 2002 Gunnar Monell <gmo@linux.nu> |
| * |
| * This file is part of FFmpeg. |
| * |
| * FFmpeg is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * FFmpeg is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with FFmpeg; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/ioctl.h> |
| #include <stdlib.h> |
| #include "fbdev_common.h" |
| #include "libavutil/common.h" |
| #include "avdevice.h" |
| |
| struct rgb_pixfmt_map_entry { |
| int bits_per_pixel; |
| int red_offset, green_offset, blue_offset, alpha_offset; |
| enum AVPixelFormat pixfmt; |
| }; |
| |
| static const struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = { |
| // bpp, red_offset, green_offset, blue_offset, alpha_offset, pixfmt |
| { 32, 0, 8, 16, 24, AV_PIX_FMT_RGBA }, |
| { 32, 16, 8, 0, 24, AV_PIX_FMT_BGRA }, |
| { 32, 8, 16, 24, 0, AV_PIX_FMT_ARGB }, |
| { 32, 3, 2, 8, 0, AV_PIX_FMT_ABGR }, |
| { 24, 0, 8, 16, 0, AV_PIX_FMT_RGB24 }, |
| { 24, 16, 8, 0, 0, AV_PIX_FMT_BGR24 }, |
| { 16, 11, 5, 0, 16, AV_PIX_FMT_RGB565 }, |
| }; |
| |
| enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo) |
| { |
| int i; |
| |
| for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) { |
| const struct rgb_pixfmt_map_entry *entry = &rgb_pixfmt_map[i]; |
| if (entry->bits_per_pixel == varinfo->bits_per_pixel && |
| entry->red_offset == varinfo->red.offset && |
| entry->green_offset == varinfo->green.offset && |
| entry->blue_offset == varinfo->blue.offset) |
| return entry->pixfmt; |
| } |
| |
| return AV_PIX_FMT_NONE; |
| } |
| |
| const char* ff_fbdev_default_device() |
| { |
| const char *dev = getenv("FRAMEBUFFER"); |
| if (!dev) |
| dev = "/dev/fb0"; |
| return dev; |
| } |
| |
| int ff_fbdev_get_device_list(AVDeviceInfoList *device_list) |
| { |
| struct fb_var_screeninfo varinfo; |
| struct fb_fix_screeninfo fixinfo; |
| char device_file[12]; |
| AVDeviceInfo *device = NULL; |
| int i, fd, ret = 0; |
| const char *default_device = ff_fbdev_default_device(); |
| |
| if (!device_list) |
| return AVERROR(EINVAL); |
| |
| for (i = 0; i <= 31; i++) { |
| snprintf(device_file, sizeof(device_file), "/dev/fb%d", i); |
| |
| if ((fd = avpriv_open(device_file, O_RDWR)) < 0) |
| continue; |
| if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1) |
| goto fail_device; |
| if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1) |
| goto fail_device; |
| |
| device = av_mallocz(sizeof(AVDeviceInfo)); |
| if (!device) { |
| ret = AVERROR(ENOMEM); |
| goto fail_device; |
| } |
| device->device_name = av_strdup(device_file); |
| device->device_description = av_strdup(fixinfo.id); |
| if (!device->device_name || !device->device_description) { |
| ret = AVERROR(ENOMEM); |
| goto fail_device; |
| } |
| |
| if ((ret = av_dynarray_add_nofree(&device_list->devices, |
| &device_list->nb_devices, device)) < 0) |
| goto fail_device; |
| |
| if (default_device && !strcmp(device->device_name, default_device)) { |
| device_list->default_device = device_list->nb_devices - 1; |
| default_device = NULL; |
| } |
| close(fd); |
| continue; |
| |
| fail_device: |
| if (device) { |
| av_free(device->device_name); |
| av_free(device->device_description); |
| av_freep(&device); |
| } |
| if (fd >= 0) |
| close(fd); |
| if (ret < 0) |
| return ret; |
| } |
| return 0; |
| } |