mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-24 16:22:37 +00:00
130 lines
4.3 KiB
C
130 lines
4.3 KiB
C
/*
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* Copyright (c) 2011 Stefano Sabatini
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* Copyright (c) 2009 Giliard B. de Freitas <giliarde@gmail.com>
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* Copyright (C) 2002 Gunnar Monell <gmo@linux.nu>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#include "fbdev_common.h"
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#include "libavutil/common.h"
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#include "avdevice.h"
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struct rgb_pixfmt_map_entry {
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int bits_per_pixel;
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int red_offset, green_offset, blue_offset, alpha_offset;
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enum AVPixelFormat pixfmt;
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};
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static const struct rgb_pixfmt_map_entry rgb_pixfmt_map[] = {
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// bpp, red_offset, green_offset, blue_offset, alpha_offset, pixfmt
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{ 32, 0, 8, 16, 24, AV_PIX_FMT_RGBA },
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{ 32, 16, 8, 0, 24, AV_PIX_FMT_BGRA },
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{ 32, 8, 16, 24, 0, AV_PIX_FMT_ARGB },
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{ 32, 3, 2, 8, 0, AV_PIX_FMT_ABGR },
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{ 24, 0, 8, 16, 0, AV_PIX_FMT_RGB24 },
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{ 24, 16, 8, 0, 0, AV_PIX_FMT_BGR24 },
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{ 16, 11, 5, 0, 16, AV_PIX_FMT_RGB565 },
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};
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enum AVPixelFormat ff_get_pixfmt_from_fb_varinfo(struct fb_var_screeninfo *varinfo)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(rgb_pixfmt_map); i++) {
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const struct rgb_pixfmt_map_entry *entry = &rgb_pixfmt_map[i];
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if (entry->bits_per_pixel == varinfo->bits_per_pixel &&
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entry->red_offset == varinfo->red.offset &&
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entry->green_offset == varinfo->green.offset &&
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entry->blue_offset == varinfo->blue.offset)
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return entry->pixfmt;
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}
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return AV_PIX_FMT_NONE;
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}
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const char* ff_fbdev_default_device()
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{
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const char *dev = getenv("FRAMEBUFFER");
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if (!dev)
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dev = "/dev/fb0";
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return dev;
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}
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int ff_fbdev_get_device_list(AVDeviceInfoList *device_list)
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{
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struct fb_var_screeninfo varinfo;
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struct fb_fix_screeninfo fixinfo;
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char device_file[12];
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AVDeviceInfo *device = NULL;
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int i, fd, ret = 0;
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const char *default_device = ff_fbdev_default_device();
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if (!device_list)
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return AVERROR(EINVAL);
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for (i = 0; i <= 31; i++) {
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snprintf(device_file, sizeof(device_file), "/dev/fb%d", i);
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if ((fd = avpriv_open(device_file, O_RDWR)) < 0)
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continue;
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if (ioctl(fd, FBIOGET_VSCREENINFO, &varinfo) == -1)
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goto fail_device;
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if (ioctl(fd, FBIOGET_FSCREENINFO, &fixinfo) == -1)
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goto fail_device;
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device = av_mallocz(sizeof(AVDeviceInfo));
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if (!device) {
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ret = AVERROR(ENOMEM);
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goto fail_device;
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}
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device->device_name = av_strdup(device_file);
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device->device_description = av_strdup(fixinfo.id);
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if (!device->device_name || !device->device_description) {
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ret = AVERROR(ENOMEM);
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goto fail_device;
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}
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if ((ret = av_dynarray_add_nofree(&device_list->devices,
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&device_list->nb_devices, device)) < 0)
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goto fail_device;
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if (default_device && !strcmp(device->device_name, default_device)) {
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device_list->default_device = device_list->nb_devices - 1;
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default_device = NULL;
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}
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close(fd);
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continue;
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fail_device:
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if (device) {
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av_free(device->device_name);
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av_free(device->device_description);
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av_freep(&device);
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}
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if (fd >= 0)
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close(fd);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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