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https://gitee.com/openharmony/third_party_ffmpeg
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lavd: add fbdev output device
Signed-off-by: Lukasz Marek <lukasz.m.luki@gmail.com> Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
This commit is contained in:
Lukasz Marek
Stefano Sabatini
parent
ff9d11f95d
commit
759388aa71
@ -42,6 +42,7 @@ version <next>
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- PulseAudio output device
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- ReplayGain scanner
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- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
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- Linux framebuffer output device
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version 2.0:
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1
configure
vendored
1
configure
vendored
@ -2125,6 +2125,7 @@ dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
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dv1394_indev_deps="dv1394"
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dv1394_indev_select="dv_demuxer"
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fbdev_indev_deps="linux_fb_h"
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fbdev_outdev_deps="linux_fb_h"
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iec61883_indev_deps="libiec61883"
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jack_indev_deps="jack_jack_h sem_timedwait"
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lavfi_indev_deps="avfilter"
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@ -104,6 +104,35 @@ ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_dither colors -
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@end example
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@end itemize
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@section fbdev
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Linux framebuffer output device.
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The Linux framebuffer is a graphic hardware-independent abstraction
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layer to show graphics on a computer monitor, typically on the
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console. It is accessed through a file device node, usually
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@file{/dev/fb0}.
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For more detailed information read the file
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@file{Documentation/fb/framebuffer.txt} included in the Linux source tree.
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@subsection Options
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@table @option
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@item xoffset
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@item yoffset
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Set x/y coordinate of top left corner. Default is 0.
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@end table
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@subsection Examples
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Play a file on framebuffer device @file{/dev/fb0}.
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Required pixel format depends on current framebuffer settings.
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@example
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ffmpeg -re -i INPUT -vcodec rawvideo -pix_fmt bgra -f fbdev /dev/fb0
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@end example
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See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).
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@section oss
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OSS (Open Sound System) output device.
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@ -24,6 +24,7 @@ OBJS-$(CONFIG_DSHOW_INDEV) += dshow.o dshow_enummediatypes.o \
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dshow_pin.o dshow_common.o
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OBJS-$(CONFIG_DV1394_INDEV) += dv1394.o
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OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o
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OBJS-$(CONFIG_FBDEV_OUTDEV) += fbdev_enc.o
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OBJS-$(CONFIG_IEC61883_INDEV) += iec61883.o
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OBJS-$(CONFIG_JACK_INDEV) += jack_audio.o timefilter.o
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OBJS-$(CONFIG_LAVFI_INDEV) += lavfi.o
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@ -51,7 +51,7 @@ void avdevice_register_all(void)
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REGISTER_OUTDEV (CACA, caca);
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REGISTER_INDEV (DSHOW, dshow);
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REGISTER_INDEV (DV1394, dv1394);
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REGISTER_INDEV (FBDEV, fbdev);
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REGISTER_INOUTDEV(FBDEV, fbdev);
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REGISTER_INDEV (IEC61883, iec61883);
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REGISTER_INDEV (JACK, jack);
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REGISTER_INDEV (LAVFI, lavfi);
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253
libavdevice/fbdev_enc.c
Normal file
253
libavdevice/fbdev_enc.c
Normal file
@ -0,0 +1,253 @@
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/*
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* Copyright (c) 2013 Lukasz Marek
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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 <sys/mman.h>
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#include <linux/fb.h>
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#include "libavutil/pixdesc.h"
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#include "libavutil/log.h"
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#include "libavutil/mem.h"
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#include "libavutil/opt.h"
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#include "libavformat/avformat.h"
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typedef struct {
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AVClass *class; ///< class for private options
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int xoffset; ///< x coordinate of top left corner
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int yoffset; ///< y coordinate of top left corner
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struct fb_var_screeninfo varinfo; ///< framebuffer variable info
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struct fb_fix_screeninfo fixinfo; ///< framebuffer fixed info
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int fd; ///< framebuffer device file descriptor
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int index; ///< index of a video stream
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uint8_t *data; ///< framebuffer data
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} FBDevContext;
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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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static enum AVPixelFormat 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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static av_cold int fbdev_write_header(AVFormatContext *h)
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{
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FBDevContext *fbdev = h->priv_data;
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enum AVPixelFormat pix_fmt;
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AVStream *st = NULL;
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int ret, flags = O_RDWR;
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for (int i = 0; i < h->nb_streams; i++) {
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if (h->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
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if (!st) {
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fbdev->index = i;
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st = h->streams[i];
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} else {
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av_log(h, AV_LOG_WARNING, "More than one video stream found. First one is used.\n");
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break;
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}
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}
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}
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if (!st) {
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av_log(h, AV_LOG_ERROR, "No video stream found.\n");
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return AVERROR(EINVAL);
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}
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if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR,
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"Could not open framebuffer device '%s': %s\n",
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h->filename, av_err2str(ret));
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return ret;
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}
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if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "FBIOGET_VSCREENINFO: %s\n", av_err2str(ret));
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goto fail;
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}
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if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "FBIOGET_FSCREENINFO: %s\n", av_err2str(ret));
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goto fail;
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}
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pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
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if (pix_fmt == AV_PIX_FMT_NONE) {
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ret = AVERROR(EINVAL);
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av_log(h, AV_LOG_ERROR, "Framebuffer pixel format not supported.\n");
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goto fail;
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}
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fbdev->data = mmap(NULL, fbdev->fixinfo.smem_len, PROT_WRITE, MAP_SHARED, fbdev->fd, 0);
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if (fbdev->data == MAP_FAILED) {
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ret = AVERROR(errno);
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av_log(h, AV_LOG_ERROR, "Error in mmap(): %s\n", av_err2str(ret));
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goto fail;
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}
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return 0;
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fail:
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close(fbdev->fd);
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return ret;
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}
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static int fbdev_write_packet(AVFormatContext *h, AVPacket *pkt)
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{
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FBDevContext *fbdev = h->priv_data;
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uint8_t *pin, *pout;
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enum AVPixelFormat fb_pix_fmt;
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int disp_height;
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int bytes_to_copy;
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AVCodecContext *codec_ctx = h->streams[fbdev->index]->codec;
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enum AVPixelFormat video_pix_fmt = codec_ctx->pix_fmt;
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int video_width = codec_ctx->width;
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int video_height = codec_ctx->height;
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int bytes_per_pixel = ((codec_ctx->bits_per_coded_sample + 7) >> 3);
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int src_line_size = video_width * bytes_per_pixel;
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if (fbdev->index != pkt->stream_index)
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return 0;
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if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0)
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av_log(h, AV_LOG_WARNING,
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"Error refreshing variable info: %s\n", av_err2str(AVERROR(errno)));
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fb_pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
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if (fb_pix_fmt != video_pix_fmt) {
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av_log(h, AV_LOG_ERROR, "Pixel format %s is not supported, use %s\n",
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av_get_pix_fmt_name(video_pix_fmt), av_get_pix_fmt_name(fb_pix_fmt));
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return AVERROR(EINVAL);
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}
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disp_height = FFMIN(fbdev->varinfo.yres, video_height);
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bytes_to_copy = FFMIN(fbdev->varinfo.xres, video_width) * bytes_per_pixel;
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pin = pkt->data;
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pout = fbdev->data +
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bytes_per_pixel * fbdev->varinfo.xoffset +
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fbdev->varinfo.yoffset * fbdev->fixinfo.line_length;
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if (fbdev->xoffset) {
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if (fbdev->xoffset < 0) {
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if (-fbdev->xoffset >= video_width) //nothing to display
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return 0;
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bytes_to_copy += fbdev->xoffset * bytes_per_pixel;
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pin -= fbdev->xoffset * bytes_per_pixel;
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} else {
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int diff = (video_width + fbdev->xoffset) - fbdev->varinfo.xres;
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if (diff > 0) {
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if (diff >= video_width) //nothing to display
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return 0;
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bytes_to_copy -= diff * bytes_per_pixel;
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}
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pout += bytes_per_pixel * fbdev->xoffset;
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}
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}
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if (fbdev->yoffset) {
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if (fbdev->yoffset < 0) {
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if (-fbdev->yoffset >= video_height) //nothing to display
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return 0;
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disp_height += fbdev->yoffset;
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pin -= fbdev->yoffset * src_line_size;
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} else {
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int diff = (video_height + fbdev->yoffset) - fbdev->varinfo.yres;
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if (diff > 0) {
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if (diff >= video_height) //nothing to display
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return 0;
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disp_height -= diff;
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}
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pout += fbdev->yoffset * fbdev->fixinfo.line_length;
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}
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}
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for (int i = 0; i < disp_height; i++) {
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memcpy(pout, pin, bytes_to_copy);
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pout += fbdev->fixinfo.line_length;
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pin += src_line_size;
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}
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return 0;
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}
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static av_cold int fbdev_write_trailer(AVFormatContext *h)
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{
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FBDevContext *fbdev = h->priv_data;
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munmap(fbdev->data, fbdev->fixinfo.smem_len);
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close(fbdev->fd);
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return 0;
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}
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#define OFFSET(x) offsetof(FBDevContext, x)
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#define ENC AV_OPT_FLAG_ENCODING_PARAM
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static const AVOption options[] = {
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{ "xoffset", "set x coordinate of top left corner", OFFSET(xoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
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{ "yoffset", "set y coordinate of top left corner", OFFSET(yoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
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{ NULL }
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};
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static const AVClass fbdev_class = {
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.class_name = "fbdev outdev",
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.item_name = av_default_item_name,
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.option = options,
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.version = LIBAVUTIL_VERSION_INT,
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};
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AVOutputFormat ff_fbdev_muxer = {
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.name = "fbdev",
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.long_name = NULL_IF_CONFIG_SMALL("Linux framebuffer"),
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.priv_data_size = sizeof(FBDevContext),
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.audio_codec = AV_CODEC_ID_NONE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.write_header = fbdev_write_header,
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.write_packet = fbdev_write_packet,
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.write_trailer = fbdev_write_trailer,
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.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
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.priv_class = &fbdev_class,
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};
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@ -28,7 +28,7 @@
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#include "libavutil/avutil.h"
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#define LIBAVDEVICE_VERSION_MAJOR 55
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#define LIBAVDEVICE_VERSION_MINOR 4
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#define LIBAVDEVICE_VERSION_MINOR 5
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#define LIBAVDEVICE_VERSION_MICRO 100
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#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
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