135 lines
4.6 KiB
C
Executable File
135 lines
4.6 KiB
C
Executable File
/*
|
|
* 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, 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;
|
|
}
|