2006-12-13 08:45:36 +00:00
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/*
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* X11 video grab interface
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2006-12-13 08:46:31 +00:00
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*
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2006-12-13 08:48:13 +00:00
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* This file is part of FFmpeg.
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2006-12-13 08:45:36 +00:00
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*
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2006-12-13 08:48:13 +00:00
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* FFmpeg integration:
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* Copyright (C) 2006 Clemens Fruhwirth <clemens@endorphin.org>
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* Edouard Gomez <ed.gomez@free.fr>
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2006-12-13 08:45:36 +00:00
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*
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2006-12-13 08:48:13 +00:00
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* This file contains code from grab.c:
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2006-12-13 08:48:56 +00:00
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* Copyright (c) 2000-2001 Fabrice Bellard
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2006-12-13 08:45:36 +00:00
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*
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* This file contains code from the xvidcap project:
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2006-12-13 08:48:13 +00:00
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* Copyright (C) 1997-1998 Rasca, Berlin
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* 2003-2004 Karl H. Beckers, Frankfurt
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2006-12-13 08:45:36 +00:00
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*
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2006-12-13 08:48:13 +00:00
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* FFmpeg is free software; you can redistribute it and/or modify
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2006-12-13 08:45:36 +00:00
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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2006-12-13 08:48:13 +00:00
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* FFmpeg is distributed in the hope that it will be useful,
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2006-12-13 08:45:36 +00:00
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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
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* GNU General Public License for more details.
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*
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2007-07-05 10:40:25 +00:00
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* You should have received a copy of the GNU General Public License
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* 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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2006-12-13 08:45:36 +00:00
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*/
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2006-12-13 08:46:31 +00:00
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2006-12-13 08:50:30 +00:00
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/**
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2010-04-20 14:45:34 +00:00
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* @file
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2011-10-30 18:10:50 +00:00
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* X11 frame device demuxer
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* @author Clemens Fruhwirth <clemens@endorphin.org>
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* @author Edouard Gomez <ed.gomez@free.fr>
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2006-12-13 08:50:30 +00:00
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*/
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2008-03-20 19:07:24 +00:00
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#include "config.h"
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2014-08-27 02:43:47 +00:00
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2006-12-13 08:45:36 +00:00
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#include <time.h>
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2014-08-27 02:43:47 +00:00
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#include <sys/shm.h>
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2012-10-23 19:39:56 +00:00
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#include <X11/cursorfont.h>
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2006-12-13 08:45:36 +00:00
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#include <X11/X.h>
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#include <X11/Xlib.h>
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#include <X11/Xlibint.h>
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#include <X11/Xproto.h>
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2006-12-13 08:48:13 +00:00
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#include <X11/Xutil.h>
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2014-08-27 02:43:47 +00:00
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2011-07-30 11:13:43 +00:00
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#include <X11/extensions/shape.h>
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2009-11-27 17:58:48 +00:00
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#include <X11/extensions/Xfixes.h>
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2014-08-27 02:43:47 +00:00
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#include <X11/extensions/XShm.h>
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2006-12-13 08:45:36 +00:00
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2015-04-08 15:27:42 +00:00
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#include "libavutil/internal.h"
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2014-08-27 02:43:47 +00:00
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/time.h"
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#include "libavformat/internal.h"
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2015-04-09 19:03:39 +00:00
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#include "avdevice.h"
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2014-08-27 02:43:47 +00:00
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/** X11 device demuxer context */
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2014-08-27 02:43:50 +00:00
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typedef struct X11GrabContext {
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2011-05-24 05:43:01 +00:00
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const AVClass *class; /**< Class for private options. */
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2006-12-13 08:50:30 +00:00
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int frame_size; /**< Size in bytes of a grabbed frame */
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AVRational time_base; /**< Time base */
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int64_t time_frame; /**< Current time */
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int width; /**< Width of the grab frame */
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2012-05-20 12:18:15 +00:00
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int height; /**< Height of the grab frame */
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2006-12-13 08:50:30 +00:00
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int x_off; /**< Horizontal top-left corner coordinate */
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int y_off; /**< Vertical top-left corner coordinate */
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Display *dpy; /**< X11 display from which x11grab grabs frames */
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XImage *image; /**< X11 image holding the grab */
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int use_shm; /**< !0 when using XShm extension */
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2016-04-27 17:45:23 +00:00
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XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm info */
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2014-08-27 02:43:47 +00:00
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int draw_mouse; /**< Set by a private option. */
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int follow_mouse; /**< Set by a private option. */
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int show_region; /**< set by a private option. */
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2014-08-28 19:21:47 +00:00
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AVRational framerate; /**< Set by a private option. */
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2013-10-24 09:10:49 +00:00
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int palette_changed;
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uint32_t palette[256];
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2011-07-30 11:13:43 +00:00
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2013-06-20 18:20:56 +00:00
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Cursor c;
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2011-07-30 11:13:43 +00:00
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Window region_win; /**< This is used by show_region option. */
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2014-08-27 02:43:50 +00:00
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} X11GrabContext;
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2006-12-13 08:50:30 +00:00
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2011-07-30 11:13:43 +00:00
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#define REGION_WIN_BORDER 3
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2014-08-27 02:43:47 +00:00
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2011-07-30 11:13:43 +00:00
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/**
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* Draw grabbing region window
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*
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2012-07-21 19:28:54 +00:00
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* @param s x11grab context
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2011-07-30 11:13:43 +00:00
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*/
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2014-08-27 02:43:50 +00:00
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static void x11grab_draw_region_win(X11GrabContext *s)
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2011-07-30 11:13:43 +00:00
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{
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Display *dpy = s->dpy;
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2014-08-27 02:43:47 +00:00
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Window win = s->region_win;
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2014-08-27 02:43:48 +00:00
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int screen = DefaultScreen(dpy);
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GC gc = XCreateGC(dpy, win, 0, 0);
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2011-07-30 11:13:43 +00:00
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XSetForeground(dpy, gc, WhitePixel(dpy, screen));
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XSetBackground(dpy, gc, BlackPixel(dpy, screen));
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XSetLineAttributes(dpy, gc, REGION_WIN_BORDER, LineDoubleDash, 0, 0);
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2014-08-27 02:43:47 +00:00
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XDrawRectangle(dpy, win, gc, 1, 1,
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2011-07-30 11:13:43 +00:00
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(s->width + REGION_WIN_BORDER * 2) - 1 * 2 - 1,
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(s->height + REGION_WIN_BORDER * 2) - 1 * 2 - 1);
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XFreeGC(dpy, gc);
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}
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/**
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* Initialize grabbing region window
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*
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2012-07-21 19:28:54 +00:00
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* @param s x11grab context
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2011-07-30 11:13:43 +00:00
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*/
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2014-08-27 02:43:50 +00:00
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static void x11grab_region_win_init(X11GrabContext *s)
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2011-07-30 11:13:43 +00:00
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{
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Display *dpy = s->dpy;
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XRectangle rect;
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2014-08-27 02:43:48 +00:00
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XSetWindowAttributes attribs = { .override_redirect = True };
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int screen = DefaultScreen(dpy);
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2011-07-30 11:13:43 +00:00
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s->region_win = XCreateWindow(dpy, RootWindow(dpy, screen),
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s->x_off - REGION_WIN_BORDER,
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s->y_off - REGION_WIN_BORDER,
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s->width + REGION_WIN_BORDER * 2,
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s->height + REGION_WIN_BORDER * 2,
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0, CopyFromParent,
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InputOutput, CopyFromParent,
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CWOverrideRedirect, &attribs);
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2014-08-27 02:43:47 +00:00
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rect.x = 0;
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rect.y = 0;
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2011-07-30 11:13:43 +00:00
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rect.width = s->width;
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rect.height = s->height;
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XShapeCombineRectangles(dpy, s->region_win,
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ShapeBounding, REGION_WIN_BORDER, REGION_WIN_BORDER,
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&rect, 1, ShapeSubtract, 0);
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XMapWindow(dpy, s->region_win);
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XSelectInput(dpy, s->region_win, ExposureMask | StructureNotifyMask);
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x11grab_draw_region_win(s);
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}
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2014-08-09 19:37:02 +00:00
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static int setup_shm(AVFormatContext *s, Display *dpy, XImage **image)
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{
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X11GrabContext *g = s->priv_data;
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int scr = XDefaultScreen(dpy);
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XImage *img = XShmCreateImage(dpy, DefaultVisual(dpy, scr),
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DefaultDepth(dpy, scr), ZPixmap, NULL,
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&g->shminfo, g->width, g->height);
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g->shminfo.shmid = shmget(IPC_PRIVATE, img->bytes_per_line * img->height,
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IPC_CREAT | 0777);
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if (g->shminfo.shmid == -1) {
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av_log(s, AV_LOG_ERROR, "Cannot get shared memory!\n");
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return AVERROR(ENOMEM);
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}
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g->shminfo.shmaddr = img->data = shmat(g->shminfo.shmid, 0, 0);
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g->shminfo.readOnly = False;
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if (!XShmAttach(dpy, &g->shminfo)) {
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av_log(s, AV_LOG_ERROR, "Failed to attach shared memory!\n");
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/* needs some better error subroutine :) */
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return AVERROR(EIO);
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}
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*image = img;
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return 0;
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}
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2014-09-11 12:15:08 +00:00
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static int setup_mouse(Display *dpy, int screen)
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{
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int ev_ret, ev_err;
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if (XFixesQueryExtension(dpy, &ev_ret, &ev_err)) {
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Window root = RootWindow(dpy, screen);
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XFixesSelectCursorInput(dpy, root, XFixesDisplayCursorNotifyMask);
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return 0;
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}
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return AVERROR(ENOSYS);
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}
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2014-08-10 15:32:18 +00:00
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static int pixfmt_from_image(AVFormatContext *s, XImage *image, int *pix_fmt)
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{
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av_log(s, AV_LOG_DEBUG,
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"Image r 0x%.6lx g 0x%.6lx b 0x%.6lx and depth %i\n",
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image->red_mask,
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image->green_mask,
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image->blue_mask,
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image->bits_per_pixel);
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|
2014-09-04 02:09:59 +00:00
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*pix_fmt = AV_PIX_FMT_NONE;
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2014-08-10 15:32:18 +00:00
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switch (image->bits_per_pixel) {
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case 8:
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*pix_fmt = AV_PIX_FMT_PAL8;
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break;
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case 16:
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if (image->red_mask == 0xf800 &&
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image->green_mask == 0x07e0 &&
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image->blue_mask == 0x001f) {
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*pix_fmt = AV_PIX_FMT_RGB565;
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} else if (image->red_mask == 0x7c00 &&
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image->green_mask == 0x03e0 &&
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image->blue_mask == 0x001f) {
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*pix_fmt = AV_PIX_FMT_RGB555;
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}
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break;
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case 24:
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if (image->red_mask == 0xff0000 &&
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image->green_mask == 0x00ff00 &&
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image->blue_mask == 0x0000ff) {
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*pix_fmt = AV_PIX_FMT_BGR24;
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} else if (image->red_mask == 0x0000ff &&
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image->green_mask == 0x00ff00 &&
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image->blue_mask == 0xff0000) {
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*pix_fmt = AV_PIX_FMT_RGB24;
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}
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break;
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case 32:
|
2014-09-03 11:58:41 +00:00
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if (image->red_mask == 0xff0000 &&
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image->green_mask == 0x00ff00 &&
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image->blue_mask == 0x0000ff ) {
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*pix_fmt = AV_PIX_FMT_0RGB32;
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}
|
2014-08-10 15:32:18 +00:00
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break;
|
2014-09-04 02:09:59 +00:00
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}
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if (*pix_fmt == AV_PIX_FMT_NONE) {
|
2014-08-10 15:32:18 +00:00
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av_log(s, AV_LOG_ERROR,
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"XImages with RGB mask 0x%.6lx 0x%.6lx 0x%.6lx and depth %i "
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"are currently not supported.\n",
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image->red_mask,
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image->green_mask,
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image->blue_mask,
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image->bits_per_pixel);
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return AVERROR_PATCHWELCOME;
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}
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return 0;
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}
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|
2006-12-13 08:50:30 +00:00
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/**
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2010-06-30 15:38:06 +00:00
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* Initialize the x11 grab device demuxer (public device demuxer API).
|
2006-12-13 08:50:30 +00:00
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*
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* @param s1 Context from avformat core
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* @return <ul>
|
2007-07-19 15:37:44 +00:00
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* <li>AVERROR(ENOMEM) no memory left</li>
|
2007-07-19 15:23:32 +00:00
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* <li>AVERROR(EIO) other failure case</li>
|
2006-12-13 08:50:30 +00:00
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* <li>0 success</li>
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* </ul>
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*/
|
2014-08-27 02:43:47 +00:00
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static int x11grab_read_header(AVFormatContext *s1)
|
2006-12-13 08:45:36 +00:00
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{
|
2014-08-27 02:43:50 +00:00
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X11GrabContext *x11grab = s1->priv_data;
|
2006-12-13 08:48:56 +00:00
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Display *dpy;
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AVStream *st = NULL;
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XImage *image;
|
2014-08-28 19:39:19 +00:00
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int x_off = 0, y_off = 0, ret = 0, screen, use_shm = 0;
|
2011-04-12 07:33:19 +00:00
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char *dpyname, *offset;
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2013-10-24 09:10:49 +00:00
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Colormap color_map;
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XColor color[256];
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int i;
|
2006-12-13 08:48:56 +00:00
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2011-04-12 07:33:19 +00:00
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dpyname = av_strdup(s1->filename);
|
2012-03-17 22:16:05 +00:00
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if (!dpyname)
|
2012-03-16 21:23:34 +00:00
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|
goto out;
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|
2011-04-12 07:33:19 +00:00
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offset = strchr(dpyname, '+');
|
2006-12-15 13:19:03 +00:00
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if (offset) {
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sscanf(offset, "%d,%d", &x_off, &y_off);
|
2012-08-08 09:19:14 +00:00
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|
if (strstr(offset, "nomouse")) {
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av_log(s1, AV_LOG_WARNING,
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|
|
"'nomouse' specification in argument is deprecated: "
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|
|
"use 'draw_mouse' option with value 0 instead\n");
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x11grab->draw_mouse = 0;
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}
|
2014-08-27 02:43:47 +00:00
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*offset = 0;
|
2006-12-15 13:19:03 +00:00
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}
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|
2014-08-27 02:43:47 +00:00
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|
av_log(s1, AV_LOG_INFO,
|
|
|
|
"device: %s -> display: %s x: %d y: %d width: %d height: %d\n",
|
2011-05-27 21:47:05 +00:00
|
|
|
s1->filename, dpyname, x_off, y_off, x11grab->width, x11grab->height);
|
2006-12-15 13:19:03 +00:00
|
|
|
|
2011-04-12 07:33:19 +00:00
|
|
|
dpy = XOpenDisplay(dpyname);
|
|
|
|
av_freep(&dpyname);
|
2014-08-27 02:43:47 +00:00
|
|
|
if (!dpy) {
|
2006-12-15 13:19:03 +00:00
|
|
|
av_log(s1, AV_LOG_ERROR, "Could not open X display.\n");
|
2011-05-26 19:17:05 +00:00
|
|
|
ret = AVERROR(EIO);
|
|
|
|
goto out;
|
2006-12-15 13:19:03 +00:00
|
|
|
}
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2011-06-18 09:43:24 +00:00
|
|
|
st = avformat_new_stream(s1, NULL);
|
2006-12-13 08:48:56 +00:00
|
|
|
if (!st) {
|
2011-05-26 19:17:05 +00:00
|
|
|
ret = AVERROR(ENOMEM);
|
|
|
|
goto out;
|
2006-12-13 08:48:56 +00:00
|
|
|
}
|
2011-11-29 18:28:15 +00:00
|
|
|
avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2011-07-30 10:46:36 +00:00
|
|
|
screen = DefaultScreen(dpy);
|
|
|
|
|
|
|
|
if (x11grab->follow_mouse) {
|
|
|
|
int screen_w, screen_h;
|
|
|
|
Window w;
|
|
|
|
|
|
|
|
screen_w = DisplayWidth(dpy, screen);
|
|
|
|
screen_h = DisplayHeight(dpy, screen);
|
2014-08-27 02:43:47 +00:00
|
|
|
XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off,
|
|
|
|
&ret, &ret, &ret);
|
2011-07-30 10:46:36 +00:00
|
|
|
x_off -= x11grab->width / 2;
|
|
|
|
y_off -= x11grab->height / 2;
|
2015-06-06 10:59:46 +00:00
|
|
|
x_off = av_clip(x_off, 0, screen_w - x11grab->width);
|
|
|
|
y_off = av_clip(y_off, 0, screen_h - x11grab->height);
|
2014-08-27 02:43:47 +00:00
|
|
|
av_log(s1, AV_LOG_INFO,
|
|
|
|
"followmouse is enabled, resetting grabbing region to x: %d y: %d\n",
|
|
|
|
x_off, y_off);
|
2011-07-30 10:46:36 +00:00
|
|
|
}
|
|
|
|
|
2014-07-15 09:37:47 +00:00
|
|
|
if (x11grab->use_shm) {
|
2014-07-17 16:28:58 +00:00
|
|
|
use_shm = XShmQueryExtension(dpy);
|
2014-08-28 19:21:47 +00:00
|
|
|
av_log(s1, AV_LOG_INFO,
|
2014-08-28 19:47:32 +00:00
|
|
|
"shared memory extension %sfound\n", use_shm ? "" : "not ");
|
2014-07-15 09:37:47 +00:00
|
|
|
}
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2014-08-09 19:37:02 +00:00
|
|
|
if (use_shm && setup_shm(s1, dpy, &image) < 0) {
|
|
|
|
av_log(s1, AV_LOG_WARNING, "Falling back to XGetImage\n");
|
|
|
|
use_shm = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!use_shm) {
|
2011-07-30 10:46:36 +00:00
|
|
|
image = XGetImage(dpy, RootWindow(dpy, screen),
|
2014-08-27 02:43:47 +00:00
|
|
|
x_off, y_off,
|
2011-05-24 05:43:01 +00:00
|
|
|
x11grab->width, x11grab->height,
|
2006-12-13 08:48:56 +00:00
|
|
|
AllPlanes, ZPixmap);
|
|
|
|
}
|
|
|
|
|
2014-09-11 12:15:08 +00:00
|
|
|
if (x11grab->draw_mouse && setup_mouse(dpy, screen) < 0) {
|
|
|
|
av_log(s1, AV_LOG_WARNING,
|
|
|
|
"XFixes not available, cannot draw the mouse cursor\n");
|
|
|
|
x11grab->draw_mouse = 0;
|
|
|
|
}
|
|
|
|
|
2014-08-27 02:43:47 +00:00
|
|
|
x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel / 8;
|
|
|
|
x11grab->dpy = dpy;
|
2014-09-03 11:58:41 +00:00
|
|
|
x11grab->time_base = av_inv_q(x11grab->framerate);
|
2011-06-03 11:36:36 +00:00
|
|
|
x11grab->time_frame = av_gettime() / av_q2d(x11grab->time_base);
|
2014-08-27 02:43:47 +00:00
|
|
|
x11grab->x_off = x_off;
|
|
|
|
x11grab->y_off = y_off;
|
|
|
|
x11grab->image = image;
|
|
|
|
x11grab->use_shm = use_shm;
|
2006-12-13 08:48:56 +00:00
|
|
|
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
ret = pixfmt_from_image(s1, image, &st->codecpar->format);
|
2014-08-10 15:32:18 +00:00
|
|
|
if (ret < 0)
|
|
|
|
goto out;
|
|
|
|
|
2016-04-10 19:58:15 +00:00
|
|
|
if (st->codecpar->format == AV_PIX_FMT_PAL8) {
|
2013-10-24 09:10:49 +00:00
|
|
|
color_map = DefaultColormap(dpy, screen);
|
|
|
|
for (i = 0; i < 256; ++i)
|
|
|
|
color[i].pixel = i;
|
|
|
|
XQueryColors(dpy, color_map, color, 256);
|
|
|
|
for (i = 0; i < 256; ++i)
|
|
|
|
x11grab->palette[i] = (color[i].red & 0xFF00) << 8 |
|
|
|
|
(color[i].green & 0xFF00) |
|
|
|
|
(color[i].blue & 0xFF00) >> 8;
|
|
|
|
x11grab->palette_changed = 1;
|
2006-12-13 08:48:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
|
lavf: replace AVStream.codec with AVStream.codecpar
Currently, AVStream contains an embedded AVCodecContext instance, which
is used by demuxers to export stream parameters to the caller and by
muxers to receive stream parameters from the caller. It is also used
internally as the codec context that is passed to parsers.
In addition, it is also widely used by the callers as the decoding (when
demuxer) or encoding (when muxing) context, though this has been
officially discouraged since Libav 11.
There are multiple important problems with this approach:
- the fields in AVCodecContext are in general one of
* stream parameters
* codec options
* codec state
However, it's not clear which ones are which. It is consequently
unclear which fields are a demuxer allowed to set or a muxer allowed to
read. This leads to erratic behaviour depending on whether decoding or
encoding is being performed or not (and whether it uses the AVStream
embedded codec context).
- various synchronization issues arising from the fact that the same
context is used by several different APIs (muxers/demuxers,
parsers, bitstream filters and encoders/decoders) simultaneously, with
there being no clear rules for who can modify what and the different
processes being typically delayed with respect to each other.
- avformat_find_stream_info() making it necessary to support opening
and closing a single codec context multiple times, thus
complicating the semantics of freeing various allocated objects in the
codec context.
Those problems are resolved by replacing the AVStream embedded codec
context with a newly added AVCodecParameters instance, which stores only
the stream parameters exported by the demuxers or read by the muxers.
2014-06-18 18:42:52 +00:00
|
|
|
st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
|
|
st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO;
|
|
|
|
st->codecpar->width = x11grab->width;
|
|
|
|
st->codecpar->height = x11grab->height;
|
|
|
|
st->codecpar->bit_rate = x11grab->frame_size * 1 / av_q2d(x11grab->time_base) * 8;
|
|
|
|
|
|
|
|
st->avg_frame_rate = av_inv_q(x11grab->time_base);
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2011-05-26 19:17:05 +00:00
|
|
|
out:
|
2012-03-18 00:09:40 +00:00
|
|
|
av_free(dpyname);
|
2011-05-26 19:17:05 +00:00
|
|
|
return ret;
|
2006-12-13 08:45:36 +00:00
|
|
|
}
|
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
/**
|
2010-06-30 15:38:06 +00:00
|
|
|
* Paint a mouse pointer in an X11 image.
|
2006-12-13 08:50:30 +00:00
|
|
|
*
|
2008-03-15 16:15:47 +00:00
|
|
|
* @param image image to paint the mouse pointer to
|
2006-12-13 08:50:30 +00:00
|
|
|
* @param s context used to retrieve original grabbing rectangle
|
|
|
|
* coordinates
|
|
|
|
*/
|
2014-08-28 19:21:47 +00:00
|
|
|
static void paint_mouse_pointer(XImage *image, AVFormatContext *s1)
|
2006-12-13 08:46:31 +00:00
|
|
|
{
|
2014-08-28 20:06:48 +00:00
|
|
|
X11GrabContext *s = s1->priv_data;
|
2014-08-27 02:43:47 +00:00
|
|
|
int x_off = s->x_off;
|
|
|
|
int y_off = s->y_off;
|
|
|
|
int width = s->width;
|
|
|
|
int height = s->height;
|
2009-11-27 17:58:48 +00:00
|
|
|
Display *dpy = s->dpy;
|
|
|
|
XFixesCursorImage *xcim;
|
|
|
|
int x, y;
|
|
|
|
int line, column;
|
|
|
|
int to_line, to_column;
|
2010-11-07 18:04:46 +00:00
|
|
|
int pixstride = image->bits_per_pixel >> 3;
|
|
|
|
/* Warning: in its insanity, xlib provides unsigned image data through a
|
|
|
|
* char* pointer, so we have to make it uint8_t to make things not break.
|
|
|
|
* Anyone who performs further investigation of the xlib API likely risks
|
|
|
|
* permanent brain damage. */
|
|
|
|
uint8_t *pix = image->data;
|
2014-09-08 11:15:18 +00:00
|
|
|
Window root;
|
2012-10-29 21:24:10 +00:00
|
|
|
XSetWindowAttributes attr;
|
2010-11-07 18:04:46 +00:00
|
|
|
|
|
|
|
/* Code doesn't currently support 16-bit or PAL8 */
|
|
|
|
if (image->bits_per_pixel != 24 && image->bits_per_pixel != 32)
|
|
|
|
return;
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2014-08-28 19:21:47 +00:00
|
|
|
if (!s->c)
|
2013-06-20 18:20:56 +00:00
|
|
|
s->c = XCreateFontCursor(dpy, XC_left_ptr);
|
2014-10-05 01:35:22 +00:00
|
|
|
root = DefaultRootWindow(dpy);
|
2013-06-20 18:20:56 +00:00
|
|
|
attr.cursor = s->c;
|
2014-09-08 11:15:18 +00:00
|
|
|
XChangeWindowAttributes(dpy, root, CWCursor, &attr);
|
2012-10-23 19:39:56 +00:00
|
|
|
|
2010-06-21 22:54:53 +00:00
|
|
|
xcim = XFixesGetCursorImage(dpy);
|
2014-07-15 13:37:00 +00:00
|
|
|
if (!xcim) {
|
|
|
|
av_log(s1, AV_LOG_WARNING,
|
2014-10-05 01:22:55 +00:00
|
|
|
"XFixesGetCursorImage failed\n");
|
2014-07-15 13:37:00 +00:00
|
|
|
return;
|
|
|
|
}
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2009-11-27 17:58:48 +00:00
|
|
|
x = xcim->x - xcim->xhot;
|
|
|
|
y = xcim->y - xcim->yhot;
|
|
|
|
|
2014-08-27 02:43:47 +00:00
|
|
|
to_line = FFMIN((y + xcim->height), (height + y_off));
|
|
|
|
to_column = FFMIN((x + xcim->width), (width + x_off));
|
2009-11-27 17:58:48 +00:00
|
|
|
|
|
|
|
for (line = FFMAX(y, y_off); line < to_line; line++) {
|
|
|
|
for (column = FFMAX(x, x_off); column < to_column; column++) {
|
2014-08-27 02:43:47 +00:00
|
|
|
int xcim_addr = (line - y) * xcim->width + column - x;
|
|
|
|
int image_addr = ((line - y_off) * width + column - x_off) * pixstride;
|
|
|
|
int r = (uint8_t)(xcim->pixels[xcim_addr] >> 0);
|
|
|
|
int g = (uint8_t)(xcim->pixels[xcim_addr] >> 8);
|
|
|
|
int b = (uint8_t)(xcim->pixels[xcim_addr] >> 16);
|
|
|
|
int a = (uint8_t)(xcim->pixels[xcim_addr] >> 24);
|
2010-11-07 18:04:46 +00:00
|
|
|
|
|
|
|
if (a == 255) {
|
2014-08-27 02:43:47 +00:00
|
|
|
pix[image_addr + 0] = r;
|
|
|
|
pix[image_addr + 1] = g;
|
|
|
|
pix[image_addr + 2] = b;
|
2010-11-07 18:04:46 +00:00
|
|
|
} else if (a) {
|
|
|
|
/* pixel values from XFixesGetCursorImage come premultiplied by alpha */
|
2014-08-27 02:43:47 +00:00
|
|
|
pix[image_addr + 0] = r + (pix[image_addr + 0] * (255 - a) + 255 / 2) / 255;
|
|
|
|
pix[image_addr + 1] = g + (pix[image_addr + 1] * (255 - a) + 255 / 2) / 255;
|
|
|
|
pix[image_addr + 2] = b + (pix[image_addr + 2] * (255 - a) + 255 / 2) / 255;
|
2006-12-13 08:49:34 +00:00
|
|
|
}
|
2006-12-13 08:48:56 +00:00
|
|
|
}
|
|
|
|
}
|
2009-11-27 17:58:48 +00:00
|
|
|
|
|
|
|
XFree(xcim);
|
|
|
|
xcim = NULL;
|
2006-12-13 08:45:36 +00:00
|
|
|
}
|
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
/**
|
2010-06-30 15:38:06 +00:00
|
|
|
* Read new data in the image structure.
|
2006-12-13 08:50:30 +00:00
|
|
|
*
|
|
|
|
* @param dpy X11 display to grab from
|
2006-12-13 09:14:30 +00:00
|
|
|
* @param d
|
2006-12-13 08:50:30 +00:00
|
|
|
* @param image Image where the grab will be put
|
|
|
|
* @param x Top-Left grabbing rectangle horizontal coordinate
|
|
|
|
* @param y Top-Left grabbing rectangle vertical coordinate
|
|
|
|
* @return 0 if error, !0 if successful
|
2006-12-13 08:45:36 +00:00
|
|
|
*/
|
2014-08-27 02:43:47 +00:00
|
|
|
static int xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y)
|
2006-12-13 08:45:36 +00:00
|
|
|
{
|
2006-12-13 08:48:56 +00:00
|
|
|
xGetImageReply rep;
|
|
|
|
xGetImageReq *req;
|
|
|
|
long nbytes;
|
|
|
|
|
2014-08-27 02:43:47 +00:00
|
|
|
if (!image)
|
2006-12-13 08:50:30 +00:00
|
|
|
return 0;
|
2006-12-13 08:48:56 +00:00
|
|
|
|
|
|
|
LockDisplay(dpy);
|
|
|
|
GetReq(GetImage, req);
|
|
|
|
|
|
|
|
/* First set up the standard stuff in the request */
|
2014-08-27 02:43:47 +00:00
|
|
|
req->drawable = d;
|
|
|
|
req->x = x;
|
|
|
|
req->y = y;
|
|
|
|
req->width = image->width;
|
|
|
|
req->height = image->height;
|
2006-12-13 08:48:56 +00:00
|
|
|
req->planeMask = (unsigned int)AllPlanes;
|
2014-08-27 02:43:47 +00:00
|
|
|
req->format = ZPixmap;
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) {
|
2006-12-13 08:48:56 +00:00
|
|
|
UnlockDisplay(dpy);
|
|
|
|
SyncHandle();
|
2006-12-13 08:50:30 +00:00
|
|
|
return 0;
|
2006-12-13 08:48:56 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
nbytes = (long)rep.length << 2;
|
|
|
|
_XReadPad(dpy, image->data, nbytes);
|
|
|
|
|
|
|
|
UnlockDisplay(dpy);
|
|
|
|
SyncHandle();
|
2006-12-13 08:50:30 +00:00
|
|
|
return 1;
|
2006-12-13 08:45:36 +00:00
|
|
|
}
|
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
/**
|
2010-06-30 15:38:06 +00:00
|
|
|
* Grab a frame from x11 (public device demuxer API).
|
2006-12-13 08:50:30 +00:00
|
|
|
*
|
|
|
|
* @param s1 Context from avformat core
|
|
|
|
* @param pkt Packet holding the brabbed frame
|
|
|
|
* @return frame size in bytes
|
|
|
|
*/
|
2014-08-27 02:43:47 +00:00
|
|
|
static int x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt)
|
2006-12-13 08:45:36 +00:00
|
|
|
{
|
2014-08-27 02:43:50 +00:00
|
|
|
X11GrabContext *s = s1->priv_data;
|
2014-08-27 02:43:47 +00:00
|
|
|
Display *dpy = s->dpy;
|
|
|
|
XImage *image = s->image;
|
|
|
|
int x_off = s->x_off;
|
|
|
|
int y_off = s->y_off;
|
|
|
|
int follow_mouse = s->follow_mouse;
|
2014-09-25 22:44:17 +00:00
|
|
|
int screen, pointer_x, pointer_y, _, same_screen = 1;
|
|
|
|
Window w, root;
|
2006-12-13 08:48:56 +00:00
|
|
|
int64_t curtime, delay;
|
|
|
|
struct timespec ts;
|
|
|
|
|
|
|
|
/* wait based on the frame rate */
|
2014-08-27 02:43:47 +00:00
|
|
|
for (;;) {
|
2006-12-13 08:48:56 +00:00
|
|
|
curtime = av_gettime();
|
2014-08-27 02:43:47 +00:00
|
|
|
delay = s->time_frame * av_q2d(s->time_base) - curtime;
|
2006-12-13 08:48:56 +00:00
|
|
|
if (delay <= 0) {
|
|
|
|
break;
|
|
|
|
}
|
2014-08-27 02:43:47 +00:00
|
|
|
ts.tv_sec = delay / 1000000;
|
2006-12-13 08:48:56 +00:00
|
|
|
ts.tv_nsec = (delay % 1000000) * 1000;
|
|
|
|
nanosleep(&ts, NULL);
|
|
|
|
}
|
|
|
|
|
2016-02-03 14:10:01 +00:00
|
|
|
/* Calculate the time of the next frame */
|
|
|
|
do {
|
|
|
|
s->time_frame += INT64_C(1000000);
|
|
|
|
} while ((s->time_frame * av_q2d(s->time_base) - curtime) <= 0);
|
|
|
|
|
2011-03-30 15:02:29 +00:00
|
|
|
pkt->data = image->data;
|
|
|
|
pkt->size = s->frame_size;
|
2014-08-27 02:43:47 +00:00
|
|
|
pkt->pts = curtime;
|
2013-10-24 09:10:49 +00:00
|
|
|
if (s->palette_changed) {
|
|
|
|
uint8_t *pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
|
|
|
|
AVPALETTE_SIZE);
|
|
|
|
if (!pal) {
|
|
|
|
av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
|
|
|
|
} else {
|
|
|
|
memcpy(pal, s->palette, AVPALETTE_SIZE);
|
|
|
|
s->palette_changed = 0;
|
|
|
|
}
|
|
|
|
}
|
2006-12-13 08:48:56 +00:00
|
|
|
|
2011-07-30 10:46:36 +00:00
|
|
|
screen = DefaultScreen(dpy);
|
2014-08-27 02:43:47 +00:00
|
|
|
root = RootWindow(dpy, screen);
|
2014-09-25 22:44:17 +00:00
|
|
|
|
|
|
|
if (follow_mouse || s->draw_mouse)
|
|
|
|
same_screen = XQueryPointer(dpy, root, &w, &w,
|
|
|
|
&pointer_x, &pointer_y, &_, &_, &_);
|
|
|
|
|
|
|
|
if (follow_mouse && same_screen) {
|
2011-07-30 10:46:36 +00:00
|
|
|
int screen_w, screen_h;
|
|
|
|
|
|
|
|
screen_w = DisplayWidth(dpy, screen);
|
|
|
|
screen_h = DisplayHeight(dpy, screen);
|
|
|
|
if (follow_mouse == -1) {
|
|
|
|
// follow the mouse, put it at center of grabbing region
|
2014-08-27 02:43:47 +00:00
|
|
|
x_off += pointer_x - s->width / 2 - x_off;
|
2011-07-30 10:46:36 +00:00
|
|
|
y_off += pointer_y - s->height / 2 - y_off;
|
|
|
|
} else {
|
|
|
|
// follow the mouse, but only move the grabbing region when mouse
|
|
|
|
// reaches within certain pixels to the edge.
|
2014-08-27 02:43:47 +00:00
|
|
|
if (pointer_x > x_off + s->width - follow_mouse)
|
2011-07-30 10:46:36 +00:00
|
|
|
x_off += pointer_x - (x_off + s->width - follow_mouse);
|
2014-08-27 02:43:47 +00:00
|
|
|
else if (pointer_x < x_off + follow_mouse)
|
2011-07-30 10:46:36 +00:00
|
|
|
x_off -= (x_off + follow_mouse) - pointer_x;
|
2014-08-27 02:43:47 +00:00
|
|
|
if (pointer_y > y_off + s->height - follow_mouse)
|
2011-07-30 10:46:36 +00:00
|
|
|
y_off += pointer_y - (y_off + s->height - follow_mouse);
|
2014-08-27 02:43:47 +00:00
|
|
|
else if (pointer_y < y_off + follow_mouse)
|
2011-07-30 10:46:36 +00:00
|
|
|
y_off -= (y_off + follow_mouse) - pointer_y;
|
|
|
|
}
|
|
|
|
// adjust grabbing region position if it goes out of screen.
|
2015-06-06 10:59:46 +00:00
|
|
|
s->x_off = x_off = av_clip(x_off, 0, screen_w - s->width);
|
|
|
|
s->y_off = y_off = av_clip(y_off, 0, screen_h - s->height);
|
2011-07-30 11:13:43 +00:00
|
|
|
|
|
|
|
if (s->show_region && s->region_win)
|
|
|
|
XMoveWindow(dpy, s->region_win,
|
|
|
|
s->x_off - REGION_WIN_BORDER,
|
|
|
|
s->y_off - REGION_WIN_BORDER);
|
|
|
|
}
|
|
|
|
|
2014-09-25 22:44:17 +00:00
|
|
|
if (s->show_region && same_screen) {
|
2011-07-30 11:13:43 +00:00
|
|
|
if (s->region_win) {
|
2014-08-27 02:43:48 +00:00
|
|
|
XEvent evt = { .type = NoEventMask };
|
|
|
|
// Clean up the events, and do the initial draw or redraw.
|
|
|
|
while (XCheckMaskEvent(dpy, ExposureMask | StructureNotifyMask,
|
|
|
|
&evt))
|
2014-08-27 02:43:47 +00:00
|
|
|
;
|
2011-07-30 11:13:43 +00:00
|
|
|
if (evt.type)
|
|
|
|
x11grab_draw_region_win(s);
|
|
|
|
} else {
|
|
|
|
x11grab_region_win_init(s);
|
|
|
|
}
|
2011-07-30 10:46:36 +00:00
|
|
|
}
|
|
|
|
|
2014-08-27 02:43:47 +00:00
|
|
|
if (s->use_shm) {
|
|
|
|
if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes))
|
|
|
|
av_log(s1, AV_LOG_INFO, "XShmGetImage() failed\n");
|
2006-12-13 08:48:56 +00:00
|
|
|
} else {
|
2014-08-27 02:43:47 +00:00
|
|
|
if (!xget_zpixmap(dpy, root, image, x_off, y_off))
|
|
|
|
av_log(s1, AV_LOG_INFO, "XGetZPixmap() failed\n");
|
2006-12-13 08:48:56 +00:00
|
|
|
}
|
|
|
|
|
2014-09-25 22:44:17 +00:00
|
|
|
if (s->draw_mouse && same_screen)
|
2014-07-15 13:37:00 +00:00
|
|
|
paint_mouse_pointer(image, s1);
|
2006-12-13 08:48:56 +00:00
|
|
|
|
|
|
|
return s->frame_size;
|
2006-12-13 08:45:36 +00:00
|
|
|
}
|
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
/**
|
2010-06-30 15:38:06 +00:00
|
|
|
* Close x11 frame grabber (public device demuxer API).
|
2006-12-13 08:50:30 +00:00
|
|
|
*
|
|
|
|
* @param s1 Context from avformat core
|
|
|
|
* @return 0 success, !0 failure
|
|
|
|
*/
|
2014-08-27 02:43:47 +00:00
|
|
|
static int x11grab_read_close(AVFormatContext *s1)
|
2006-12-13 08:45:36 +00:00
|
|
|
{
|
2014-08-27 02:43:50 +00:00
|
|
|
X11GrabContext *x11grab = s1->priv_data;
|
2006-12-13 08:48:56 +00:00
|
|
|
|
|
|
|
/* Detach cleanly from shared mem */
|
|
|
|
if (x11grab->use_shm) {
|
|
|
|
XShmDetach(x11grab->dpy, &x11grab->shminfo);
|
|
|
|
shmdt(x11grab->shminfo.shmaddr);
|
|
|
|
shmctl(x11grab->shminfo.shmid, IPC_RMID, NULL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Destroy X11 image */
|
|
|
|
if (x11grab->image) {
|
|
|
|
XDestroyImage(x11grab->image);
|
|
|
|
x11grab->image = NULL;
|
|
|
|
}
|
|
|
|
|
2014-08-27 02:43:47 +00:00
|
|
|
if (x11grab->region_win)
|
2011-07-30 11:13:43 +00:00
|
|
|
XDestroyWindow(x11grab->dpy, x11grab->region_win);
|
|
|
|
|
2006-12-13 08:48:56 +00:00
|
|
|
/* Free X11 display */
|
|
|
|
XCloseDisplay(x11grab->dpy);
|
|
|
|
return 0;
|
2006-12-13 08:45:36 +00:00
|
|
|
}
|
|
|
|
|
2014-08-27 02:43:50 +00:00
|
|
|
#define OFFSET(x) offsetof(X11GrabContext, x)
|
2011-05-24 05:43:01 +00:00
|
|
|
#define DEC AV_OPT_FLAG_DECODING_PARAM
|
|
|
|
static const AVOption options[] = {
|
2015-02-27 09:22:08 +00:00
|
|
|
{ "grab_x", "Initial x coordinate.", OFFSET(x_off), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
|
|
|
|
{ "grab_y", "Initial y coordinate.", OFFSET(y_off), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, DEC },
|
2012-09-05 12:26:01 +00:00
|
|
|
{ "draw_mouse", "draw the mouse pointer", OFFSET(draw_mouse), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC },
|
2012-08-08 08:21:41 +00:00
|
|
|
|
|
|
|
{ "follow_mouse", "move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region",
|
2012-09-05 12:26:01 +00:00
|
|
|
OFFSET(follow_mouse), AV_OPT_TYPE_INT, {.i64 = 0}, -1, INT_MAX, DEC, "follow_mouse" },
|
2012-08-08 08:21:41 +00:00
|
|
|
{ "centered", "keep the mouse pointer at the center of grabbing region when following",
|
2012-09-05 11:58:11 +00:00
|
|
|
0, AV_OPT_TYPE_CONST, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "follow_mouse" },
|
2012-08-08 08:21:41 +00:00
|
|
|
|
2016-06-09 02:52:52 +00:00
|
|
|
{ "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, INT_MAX, DEC },
|
2012-09-05 12:26:01 +00:00
|
|
|
{ "show_region", "show the grabbing region", OFFSET(show_region), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC },
|
2012-08-08 08:21:41 +00:00
|
|
|
{ "video_size", "set video frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC },
|
2014-07-15 09:37:47 +00:00
|
|
|
{ "use_shm", "use MIT-SHM extension", OFFSET(use_shm), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC },
|
2011-05-24 05:43:01 +00:00
|
|
|
{ NULL },
|
|
|
|
};
|
|
|
|
|
|
|
|
static const AVClass x11_class = {
|
|
|
|
.class_name = "X11grab indev",
|
|
|
|
.item_name = av_default_item_name,
|
|
|
|
.option = options,
|
|
|
|
.version = LIBAVUTIL_VERSION_INT,
|
2014-02-22 22:32:51 +00:00
|
|
|
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT,
|
2011-05-24 05:43:01 +00:00
|
|
|
};
|
|
|
|
|
2006-12-13 08:50:30 +00:00
|
|
|
/** x11 grabber device demuxer declaration */
|
2012-07-21 19:28:54 +00:00
|
|
|
AVInputFormat ff_x11grab_demuxer = {
|
2011-09-23 18:50:11 +00:00
|
|
|
.name = "x11grab",
|
|
|
|
.long_name = NULL_IF_CONFIG_SMALL("X11grab"),
|
2014-08-27 02:43:50 +00:00
|
|
|
.priv_data_size = sizeof(X11GrabContext),
|
2011-09-23 18:50:11 +00:00
|
|
|
.read_header = x11grab_read_header,
|
|
|
|
.read_packet = x11grab_read_packet,
|
|
|
|
.read_close = x11grab_read_close,
|
|
|
|
.flags = AVFMT_NOFILE,
|
|
|
|
.priv_class = &x11_class,
|
2006-12-13 08:45:36 +00:00
|
|
|
};
|