/* * 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; }