mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
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>
|
||||
- PulseAudio output device
|
||||
- ReplayGain scanner
|
||||
- Enhanced Low Delay AAC (ER AAC ELD) decoding (no LD SBR support)
|
||||
- Linux framebuffer output device
|
||||
|
||||
|
||||
version 2.0:
|
||||
|
||||
1
configure
vendored
1
configure
vendored
@ -2125,6 +2125,7 @@ dshow_indev_extralibs="-lpsapi -lole32 -lstrmiids -luuid"
|
||||
dv1394_indev_deps="dv1394"
|
||||
dv1394_indev_select="dv_demuxer"
|
||||
fbdev_indev_deps="linux_fb_h"
|
||||
fbdev_outdev_deps="linux_fb_h"
|
||||
iec61883_indev_deps="libiec61883"
|
||||
jack_indev_deps="jack_jack_h sem_timedwait"
|
||||
lavfi_indev_deps="avfilter"
|
||||
|
||||
@ -104,6 +104,35 @@ ffmpeg -i INPUT -pix_fmt rgb24 -f caca -list_dither colors -
|
||||
@end example
|
||||
@end itemize
|
||||
|
||||
@section fbdev
|
||||
|
||||
Linux framebuffer output device.
|
||||
|
||||
The Linux framebuffer is a graphic hardware-independent abstraction
|
||||
layer to show graphics on a computer monitor, typically on the
|
||||
console. It is accessed through a file device node, usually
|
||||
@file{/dev/fb0}.
|
||||
|
||||
For more detailed information read the file
|
||||
@file{Documentation/fb/framebuffer.txt} included in the Linux source tree.
|
||||
|
||||
@subsection Options
|
||||
@table @option
|
||||
|
||||
@item xoffset
|
||||
@item yoffset
|
||||
Set x/y coordinate of top left corner. Default is 0.
|
||||
@end table
|
||||
|
||||
@subsection Examples
|
||||
Play a file on framebuffer device @file{/dev/fb0}.
|
||||
Required pixel format depends on current framebuffer settings.
|
||||
@example
|
||||
ffmpeg -re -i INPUT -vcodec rawvideo -pix_fmt bgra -f fbdev /dev/fb0
|
||||
@end example
|
||||
|
||||
See also @url{http://linux-fbdev.sourceforge.net/}, and fbset(1).
|
||||
|
||||
@section oss
|
||||
|
||||
OSS (Open Sound System) output device.
|
||||
|
||||
@ -24,6 +24,7 @@ OBJS-$(CONFIG_DSHOW_INDEV) += dshow.o dshow_enummediatypes.o \
|
||||
dshow_pin.o dshow_common.o
|
||||
OBJS-$(CONFIG_DV1394_INDEV) += dv1394.o
|
||||
OBJS-$(CONFIG_FBDEV_INDEV) += fbdev.o
|
||||
OBJS-$(CONFIG_FBDEV_OUTDEV) += fbdev_enc.o
|
||||
OBJS-$(CONFIG_IEC61883_INDEV) += iec61883.o
|
||||
OBJS-$(CONFIG_JACK_INDEV) += jack_audio.o timefilter.o
|
||||
OBJS-$(CONFIG_LAVFI_INDEV) += lavfi.o
|
||||
|
||||
@ -51,7 +51,7 @@ void avdevice_register_all(void)
|
||||
REGISTER_OUTDEV (CACA, caca);
|
||||
REGISTER_INDEV (DSHOW, dshow);
|
||||
REGISTER_INDEV (DV1394, dv1394);
|
||||
REGISTER_INDEV (FBDEV, fbdev);
|
||||
REGISTER_INOUTDEV(FBDEV, fbdev);
|
||||
REGISTER_INDEV (IEC61883, iec61883);
|
||||
REGISTER_INDEV (JACK, jack);
|
||||
REGISTER_INDEV (LAVFI, lavfi);
|
||||
|
||||
253
libavdevice/fbdev_enc.c
Normal file
253
libavdevice/fbdev_enc.c
Normal file
@ -0,0 +1,253 @@
|
||||
/*
|
||||
* Copyright (c) 2013 Lukasz Marek
|
||||
*
|
||||
* 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 <sys/mman.h>
|
||||
#include <linux/fb.h>
|
||||
#include "libavutil/pixdesc.h"
|
||||
#include "libavutil/log.h"
|
||||
#include "libavutil/mem.h"
|
||||
#include "libavutil/opt.h"
|
||||
#include "libavformat/avformat.h"
|
||||
|
||||
typedef struct {
|
||||
AVClass *class; ///< class for private options
|
||||
int xoffset; ///< x coordinate of top left corner
|
||||
int yoffset; ///< y coordinate of top left corner
|
||||
struct fb_var_screeninfo varinfo; ///< framebuffer variable info
|
||||
struct fb_fix_screeninfo fixinfo; ///< framebuffer fixed info
|
||||
int fd; ///< framebuffer device file descriptor
|
||||
int index; ///< index of a video stream
|
||||
uint8_t *data; ///< framebuffer data
|
||||
} FBDevContext;
|
||||
|
||||
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, 16, AV_PIX_FMT_RGB565 },
|
||||
};
|
||||
|
||||
static enum AVPixelFormat 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;
|
||||
}
|
||||
|
||||
static av_cold int fbdev_write_header(AVFormatContext *h)
|
||||
{
|
||||
FBDevContext *fbdev = h->priv_data;
|
||||
enum AVPixelFormat pix_fmt;
|
||||
AVStream *st = NULL;
|
||||
int ret, flags = O_RDWR;
|
||||
|
||||
for (int i = 0; i < h->nb_streams; i++) {
|
||||
if (h->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
|
||||
if (!st) {
|
||||
fbdev->index = i;
|
||||
st = h->streams[i];
|
||||
} else {
|
||||
av_log(h, AV_LOG_WARNING, "More than one video stream found. First one is used.\n");
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (!st) {
|
||||
av_log(h, AV_LOG_ERROR, "No video stream found.\n");
|
||||
return AVERROR(EINVAL);
|
||||
}
|
||||
|
||||
if ((fbdev->fd = avpriv_open(h->filename, flags)) == -1) {
|
||||
ret = AVERROR(errno);
|
||||
av_log(h, AV_LOG_ERROR,
|
||||
"Could not open framebuffer device '%s': %s\n",
|
||||
h->filename, av_err2str(ret));
|
||||
return ret;
|
||||
}
|
||||
|
||||
if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0) {
|
||||
ret = AVERROR(errno);
|
||||
av_log(h, AV_LOG_ERROR, "FBIOGET_VSCREENINFO: %s\n", av_err2str(ret));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if (ioctl(fbdev->fd, FBIOGET_FSCREENINFO, &fbdev->fixinfo) < 0) {
|
||||
ret = AVERROR(errno);
|
||||
av_log(h, AV_LOG_ERROR, "FBIOGET_FSCREENINFO: %s\n", av_err2str(ret));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
|
||||
if (pix_fmt == AV_PIX_FMT_NONE) {
|
||||
ret = AVERROR(EINVAL);
|
||||
av_log(h, AV_LOG_ERROR, "Framebuffer pixel format not supported.\n");
|
||||
goto fail;
|
||||
}
|
||||
|
||||
fbdev->data = mmap(NULL, fbdev->fixinfo.smem_len, PROT_WRITE, MAP_SHARED, fbdev->fd, 0);
|
||||
if (fbdev->data == MAP_FAILED) {
|
||||
ret = AVERROR(errno);
|
||||
av_log(h, AV_LOG_ERROR, "Error in mmap(): %s\n", av_err2str(ret));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
return 0;
|
||||
fail:
|
||||
close(fbdev->fd);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int fbdev_write_packet(AVFormatContext *h, AVPacket *pkt)
|
||||
{
|
||||
FBDevContext *fbdev = h->priv_data;
|
||||
uint8_t *pin, *pout;
|
||||
enum AVPixelFormat fb_pix_fmt;
|
||||
int disp_height;
|
||||
int bytes_to_copy;
|
||||
AVCodecContext *codec_ctx = h->streams[fbdev->index]->codec;
|
||||
enum AVPixelFormat video_pix_fmt = codec_ctx->pix_fmt;
|
||||
int video_width = codec_ctx->width;
|
||||
int video_height = codec_ctx->height;
|
||||
int bytes_per_pixel = ((codec_ctx->bits_per_coded_sample + 7) >> 3);
|
||||
int src_line_size = video_width * bytes_per_pixel;
|
||||
|
||||
if (fbdev->index != pkt->stream_index)
|
||||
return 0;
|
||||
|
||||
if (ioctl(fbdev->fd, FBIOGET_VSCREENINFO, &fbdev->varinfo) < 0)
|
||||
av_log(h, AV_LOG_WARNING,
|
||||
"Error refreshing variable info: %s\n", av_err2str(AVERROR(errno)));
|
||||
|
||||
fb_pix_fmt = get_pixfmt_from_fb_varinfo(&fbdev->varinfo);
|
||||
|
||||
if (fb_pix_fmt != video_pix_fmt) {
|
||||
av_log(h, AV_LOG_ERROR, "Pixel format %s is not supported, use %s\n",
|
||||
av_get_pix_fmt_name(video_pix_fmt), av_get_pix_fmt_name(fb_pix_fmt));
|
||||
return AVERROR(EINVAL);
|
||||
}
|
||||
|
||||
disp_height = FFMIN(fbdev->varinfo.yres, video_height);
|
||||
bytes_to_copy = FFMIN(fbdev->varinfo.xres, video_width) * bytes_per_pixel;
|
||||
|
||||
pin = pkt->data;
|
||||
pout = fbdev->data +
|
||||
bytes_per_pixel * fbdev->varinfo.xoffset +
|
||||
fbdev->varinfo.yoffset * fbdev->fixinfo.line_length;
|
||||
|
||||
if (fbdev->xoffset) {
|
||||
if (fbdev->xoffset < 0) {
|
||||
if (-fbdev->xoffset >= video_width) //nothing to display
|
||||
return 0;
|
||||
bytes_to_copy += fbdev->xoffset * bytes_per_pixel;
|
||||
pin -= fbdev->xoffset * bytes_per_pixel;
|
||||
} else {
|
||||
int diff = (video_width + fbdev->xoffset) - fbdev->varinfo.xres;
|
||||
if (diff > 0) {
|
||||
if (diff >= video_width) //nothing to display
|
||||
return 0;
|
||||
bytes_to_copy -= diff * bytes_per_pixel;
|
||||
}
|
||||
pout += bytes_per_pixel * fbdev->xoffset;
|
||||
}
|
||||
}
|
||||
|
||||
if (fbdev->yoffset) {
|
||||
if (fbdev->yoffset < 0) {
|
||||
if (-fbdev->yoffset >= video_height) //nothing to display
|
||||
return 0;
|
||||
disp_height += fbdev->yoffset;
|
||||
pin -= fbdev->yoffset * src_line_size;
|
||||
} else {
|
||||
int diff = (video_height + fbdev->yoffset) - fbdev->varinfo.yres;
|
||||
if (diff > 0) {
|
||||
if (diff >= video_height) //nothing to display
|
||||
return 0;
|
||||
disp_height -= diff;
|
||||
}
|
||||
pout += fbdev->yoffset * fbdev->fixinfo.line_length;
|
||||
}
|
||||
}
|
||||
|
||||
for (int i = 0; i < disp_height; i++) {
|
||||
memcpy(pout, pin, bytes_to_copy);
|
||||
pout += fbdev->fixinfo.line_length;
|
||||
pin += src_line_size;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold int fbdev_write_trailer(AVFormatContext *h)
|
||||
{
|
||||
FBDevContext *fbdev = h->priv_data;
|
||||
munmap(fbdev->data, fbdev->fixinfo.smem_len);
|
||||
close(fbdev->fd);
|
||||
return 0;
|
||||
}
|
||||
|
||||
#define OFFSET(x) offsetof(FBDevContext, x)
|
||||
#define ENC AV_OPT_FLAG_ENCODING_PARAM
|
||||
static const AVOption options[] = {
|
||||
{ "xoffset", "set x coordinate of top left corner", OFFSET(xoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
|
||||
{ "yoffset", "set y coordinate of top left corner", OFFSET(yoffset), AV_OPT_TYPE_INT, {.i64 = 0}, INT_MIN, INT_MAX, ENC },
|
||||
{ NULL }
|
||||
};
|
||||
|
||||
static const AVClass fbdev_class = {
|
||||
.class_name = "fbdev outdev",
|
||||
.item_name = av_default_item_name,
|
||||
.option = options,
|
||||
.version = LIBAVUTIL_VERSION_INT,
|
||||
};
|
||||
|
||||
AVOutputFormat ff_fbdev_muxer = {
|
||||
.name = "fbdev",
|
||||
.long_name = NULL_IF_CONFIG_SMALL("Linux framebuffer"),
|
||||
.priv_data_size = sizeof(FBDevContext),
|
||||
.audio_codec = AV_CODEC_ID_NONE,
|
||||
.video_codec = AV_CODEC_ID_RAWVIDEO,
|
||||
.write_header = fbdev_write_header,
|
||||
.write_packet = fbdev_write_packet,
|
||||
.write_trailer = fbdev_write_trailer,
|
||||
.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
|
||||
.priv_class = &fbdev_class,
|
||||
};
|
||||
@ -28,7 +28,7 @@
|
||||
#include "libavutil/avutil.h"
|
||||
|
||||
#define LIBAVDEVICE_VERSION_MAJOR 55
|
||||
#define LIBAVDEVICE_VERSION_MINOR 4
|
||||
#define LIBAVDEVICE_VERSION_MINOR 5
|
||||
#define LIBAVDEVICE_VERSION_MICRO 100
|
||||
|
||||
#define LIBAVDEVICE_VERSION_INT AV_VERSION_INT(LIBAVDEVICE_VERSION_MAJOR, \
|
||||
|
||||
Loading…
Reference in New Issue
Block a user