/* * 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 "libavutil/file_open.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,            0,   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) {            int err = AVERROR(errno);            if (err != AVERROR(ENOENT))                av_log(NULL, AV_LOG_ERROR, "Could not open framebuffer device '%s': %s\n",                       device_file, av_err2str(err));            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_freep(&device->device_name);            av_freep(&device->device_description);            av_freep(&device);        }        if (fd >= 0)            close(fd);        if (ret < 0)            return ret;    }    return 0;}