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lavd: add xv output device
Based on the work of Jeff Moguillansky <Jeff.Moguillansky@am.sony.com>. See thread: Subject: [FFmpeg-devel] x11 output device for libavdevice Date: Wed, 10 Apr 2013 23:10:47 +0000
This commit is contained in:
Stefano Sabatini
parent
1bbbbb0a32
commit
9f8937b5ef
@ -58,6 +58,7 @@ version <next>:
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- Hald CLUT support (generation and filtering)
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- VC-1 interlaced B-frame support
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- support for WavPack muxing (raw and in Matroska)
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- XVideo output device
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version 1.2:
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3
configure
vendored
3
configure
vendored
@ -2084,6 +2084,8 @@ v4l2_indev_deps_any="linux_videodev2_h sys_videoio_h"
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v4l2_outdev_deps_any="linux_videodev2_h sys_videoio_h"
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vfwcap_indev_deps="capCreateCaptureWindow vfwcap_defines"
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vfwcap_indev_extralibs="-lavicap32"
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xv_outdev_deps="X11_extensions_Xvlib_h XvGetPortAttribute"
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xv_outdev_extralibs="-lXv"
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x11grab_indev_deps="x11grab"
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# protocols
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@ -3982,6 +3984,7 @@ check_func_headers windows.h SetConsoleTextAttribute
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check_func_headers windows.h Sleep
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check_func_headers windows.h VirtualAlloc
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check_func_headers glob.h glob
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check_func_headers "X11/Xlib.h X11/extensions/Xvlib.h" XvGetPortAttribute -lXv
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check_header cl/cl.h
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check_header direct.h
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@ -153,4 +153,69 @@ ffmpeg -i INPUT -vcodec rawvideo -pix_fmt yuv420p -window_size qcif -f sdl "SDL
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sndio audio output device.
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@section xv
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XV (XVideo) output device.
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This output device allows to show a video stream in a X Window System
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window.
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@subsection Options
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@table @option
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@item display_name
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Specify the hardware display name, which determines the display and
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communications domain to be used.
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The display name or DISPLAY environment variable can be a string in
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the format @var{hostname}[:@var{number}[.@var{screen_number}]].
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@var{hostname} specifies the name of the host machine on which the
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display is physically attached. @var{number} specifies the number of
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the display server on that host machine. @var{screen_number} specifies
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the screen to be used on that server.
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If unspecified, it defaults to the value of the DISPLAY environment
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variable.
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For example, @code{dual-headed:0.1} would specify screen 1 of display
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0 on the machine named ``dual-headed''.
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Check the X11 specification for more detailed information about the
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display name format.
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@item window_size
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Set the created window size, can be a string of the form
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@var{width}x@var{height} or a video size abbreviation. If not
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specified it defaults to the size of the input video.
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@item window_x
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@item window_y
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Set the X and Y window offsets for the created window. They are both
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set to 0 by default. The values may be ignored by the window manager.
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@item window_title
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Set the window title, if not specified default to the filename
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specified for the output device.
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@end table
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For more information about XVideo see @url{http://www.x.org/}.
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@subsection Examples
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@itemize
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@item
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Decode, display and encode video input with @command{ffmpeg} at the
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same time:
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@example
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ffmpeg -i INPUT OUTPUT -f xv display
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@end example
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@item
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Decode and display the input video to multiple X11 windows:
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@example
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ffmpeg -i INPUT -f xv normal -vf negate -f xv negated
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@end example
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@end itemize
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@c man end OUTPUT DEVICES
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@ -37,6 +37,7 @@ OBJS-$(CONFIG_V4L2_OUTDEV) += v4l2enc.o v4l2-common.o
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OBJS-$(CONFIG_V4L_INDEV) += v4l.o
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OBJS-$(CONFIG_VFWCAP_INDEV) += vfwcap.o
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OBJS-$(CONFIG_X11GRAB_INDEV) += x11grab.o
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OBJS-$(CONFIG_XV_OUTDEV) += xv.o
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# external libraries
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OBJS-$(CONFIG_LIBCDIO_INDEV) += libcdio.o
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@ -64,6 +64,7 @@ void avdevice_register_all(void)
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// REGISTER_INDEV (V4L, v4l
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REGISTER_INDEV (VFWCAP, vfwcap);
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REGISTER_INDEV (X11GRAB, x11grab);
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REGISTER_OUTDEV (XV, xv);
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/* external libraries */
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REGISTER_INDEV (LIBCDIO, libcdio);
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@ -28,8 +28,8 @@
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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 1
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#define LIBAVDEVICE_VERSION_MICRO 101
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#define LIBAVDEVICE_VERSION_MINOR 2
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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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LIBAVDEVICE_VERSION_MINOR, \
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217
libavdevice/xv.c
Normal file
217
libavdevice/xv.c
Normal file
@ -0,0 +1,217 @@
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/*
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* Copyright (c) 2013 Jeff Moguillansky
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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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/**
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* @file
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* XVideo output device
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*
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* TODO:
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* - add support to more formats
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* - add support to window id specification
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*/
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#include <X11/Xlib.h>
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#include <X11/extensions/Xv.h>
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#include <X11/extensions/Xvlib.h>
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#include <X11/extensions/XShm.h>
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#include <sys/shm.h>
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avdevice.h"
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typedef struct {
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AVClass *class;
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GC gc;
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Window window;
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char *window_title;
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int window_width, window_height;
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int window_x, window_y;
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Display* display;
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char *display_name;
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XvImage* yuv_image;
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int image_width, image_height;
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XShmSegmentInfo yuv_shminfo;
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int xv_port;
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} XVContext;
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static int xv_write_header(AVFormatContext *s)
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{
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XVContext *xv = s->priv_data;
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unsigned int num_adaptors;
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XvAdaptorInfo *ai;
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XvImageFormatValues *fv;
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int num_formats = 0, j;
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AVCodecContext *encctx = s->streams[0]->codec;
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if ( s->nb_streams > 1
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|| encctx->codec_type != AVMEDIA_TYPE_VIDEO
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|| encctx->codec_id != AV_CODEC_ID_RAWVIDEO) {
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av_log(s, AV_LOG_ERROR, "Only supports one rawvideo stream\n");
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return AVERROR(EINVAL);
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}
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xv->display = XOpenDisplay(xv->display_name);
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if (!xv->display) {
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av_log(s, AV_LOG_ERROR, "Could not open the X11 display '%s'\n", xv->display_name);
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return AVERROR(EINVAL);
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}
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xv->image_width = encctx->width;
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xv->image_height = encctx->height;
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if (!xv->window_width && !xv->window_height) {
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xv->window_width = encctx->width;
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xv->window_height = encctx->height;
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}
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xv->window = XCreateSimpleWindow(xv->display, DefaultRootWindow(xv->display),
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xv->window_x, xv->window_y,
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xv->window_width, xv->window_height,
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0, 0, 0);
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if (!xv->window_title) {
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if (!(xv->window_title = av_strdup(s->filename)))
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return AVERROR(ENOMEM);
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}
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XStoreName(xv->display, xv->window, xv->window_title);
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XMapWindow(xv->display, xv->window);
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if (XvQueryAdaptors(xv->display, DefaultRootWindow(xv->display), &num_adaptors, &ai) != Success)
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return AVERROR_EXTERNAL;
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xv->xv_port = ai[0].base_id;
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if (encctx->pix_fmt != AV_PIX_FMT_YUV420P) {
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av_log(s, AV_LOG_ERROR,
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"Unsupported pixel format '%s', only yuv420p is currently supported\n",
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av_get_pix_fmt_name(encctx->pix_fmt));
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return AVERROR_PATCHWELCOME;
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}
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fv = XvListImageFormats(xv->display, xv->xv_port, &num_formats);
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if (!fv)
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return AVERROR_EXTERNAL;
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for (j = 0; j < num_formats; j++) {
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if (fv[j].id == MKTAG('I','4','2','0')) {
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break;
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}
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}
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XFree(fv);
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if (j >= num_formats) {
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av_log(s, AV_LOG_ERROR,
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"Device does not support pixel format yuv420p, aborting\n");
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return AVERROR(EINVAL);
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}
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xv->gc = XCreateGC(xv->display, xv->window, 0, 0);
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xv->image_width = encctx->width;
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xv->image_height = encctx->height;
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xv->yuv_image = XvShmCreateImage(xv->display, xv->xv_port,
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MKTAG('I','4','2','0'), 0,
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xv->image_width, xv->image_height, &xv->yuv_shminfo);
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xv->yuv_shminfo.shmid = shmget(IPC_PRIVATE, xv->yuv_image->data_size,
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IPC_CREAT | 0777);
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xv->yuv_shminfo.shmaddr = (char *)shmat(xv->yuv_shminfo.shmid, 0, 0);
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xv->yuv_image->data = xv->yuv_shminfo.shmaddr;
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xv->yuv_shminfo.readOnly = False;
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XShmAttach(xv->display, &xv->yuv_shminfo);
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XSync(xv->display, False);
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shmctl(xv->yuv_shminfo.shmid, IPC_RMID, 0);
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return 0;
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}
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static int xv_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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XVContext *xv = s->priv_data;
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XvImage *img = xv->yuv_image;
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XWindowAttributes window_attrs;
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AVPicture pict;
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AVCodecContext *ctx = s->streams[0]->codec;
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int y, h;
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h = img->height / 2;
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avpicture_fill(&pict, pkt->data, ctx->pix_fmt, ctx->width, ctx->height);
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for (y = 0; y < img->height; y++) {
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memcpy(&img->data[img->offsets[0] + (y * img->pitches[0])],
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&pict.data[0][y * pict.linesize[0]], img->pitches[0]);
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}
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for (y = 0; y < h; ++y) {
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memcpy(&img->data[img->offsets[1] + (y * img->pitches[1])],
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&pict.data[1][y * pict.linesize[1]], img->pitches[1]);
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memcpy(&img->data[img->offsets[2] + (y * img->pitches[2])],
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&pict.data[2][y * pict.linesize[2]], img->pitches[2]);
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}
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XGetWindowAttributes(xv->display, xv->window, &window_attrs);
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if (XvShmPutImage(xv->display, xv->xv_port, xv->window, xv->gc,
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xv->yuv_image, 0, 0, xv->image_width, xv->image_height, 0, 0,
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window_attrs.width, window_attrs.height, True) != Success) {
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av_log(s, AV_LOG_ERROR, "Could not copy image to XV shared memory buffer\n");
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return AVERROR_EXTERNAL;
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}
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return 0;
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}
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static int xv_write_trailer(AVFormatContext *s)
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{
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XVContext *xv = s->priv_data;
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XShmDetach(xv->display, &xv->yuv_shminfo);
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shmdt(xv->yuv_image->data);
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XFree(xv->yuv_image);
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XCloseDisplay(xv->display);
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return 0;
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}
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#define OFFSET(x) offsetof(XVContext, x)
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static const AVOption options[] = {
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{ "display_name", "set display name", OFFSET(display_name), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_size", "set window forced size", OFFSET(window_width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_title", "set window title", OFFSET(window_title), AV_OPT_TYPE_STRING, {.str = NULL }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_x", "set window x offset", OFFSET(window_x), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
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{ "window_y", "set window y offset", OFFSET(window_y), AV_OPT_TYPE_INT, {.i64 = 0 }, -INT_MAX, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
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{ NULL }
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};
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static const AVClass xv_class = {
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.class_name = "xvideo 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_xv_muxer = {
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.name = "xv",
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.long_name = NULL_IF_CONFIG_SMALL("XV (XVideo) output device"),
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.priv_data_size = sizeof(XVContext),
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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 = xv_write_header,
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.write_packet = xv_write_packet,
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.write_trailer = xv_write_trailer,
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.flags = AVFMT_NOFILE | AVFMT_VARIABLE_FPS | AVFMT_NOTIMESTAMPS,
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.priv_class = &xv_class,
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};
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