GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavdevice/fbdev_common.c Lines: 0 58 0.0 %
Date: 2020-08-13 15:06:06 Branches: 0 42 0.0 %

Line Branch Exec Source
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/*
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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,            0,   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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            int err = AVERROR(errno);
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            if (err != AVERROR(ENOENT))
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                av_log(NULL, AV_LOG_ERROR, "Could not open framebuffer device '%s': %s\n",
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                       device_file, av_err2str(err));
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            continue;
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        }
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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_freep(&device->device_name);
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            av_freep(&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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}