mirror of https://github.com/FFmpeg/FFmpeg.git
* commit '4fef648d10bf3bcfd4b8fa5755c1128966a2427c': Remove the legacy X11 screen grabber Merged-by: Clément Bœsch <u@pkh.me>pull/244/merge
Clément Bœsch
8 years ago
commit
4a9c5f6bc5
7 changed files with 4 additions and 709 deletions
@ -1,695 +0,0 @@ |
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/*
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* X11 video grab interface |
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* |
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* This file is part of FFmpeg. |
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* |
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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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* |
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* This file contains code from grab.c: |
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* Copyright (c) 2000-2001 Fabrice Bellard |
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* |
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* This file contains code from the xvidcap project: |
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* Copyright (C) 1997-1998 Rasca, Berlin |
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* 2003-2004 Karl H. Beckers, Frankfurt |
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* |
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* FFmpeg is free software; you can redistribute it and/or modify |
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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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* 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 |
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* GNU General Public License for more details. |
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* |
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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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*/ |
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/**
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* @file |
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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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*/ |
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#include "config.h" |
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#include <time.h> |
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#include <sys/shm.h> |
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#include <X11/cursorfont.h> |
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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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#include <X11/Xutil.h> |
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#include <X11/extensions/shape.h> |
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#include <X11/extensions/Xfixes.h> |
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#include <X11/extensions/XShm.h> |
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#include "libavutil/internal.h" |
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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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#include "avdevice.h" |
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/** X11 device demuxer context */ |
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typedef struct X11GrabContext { |
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const AVClass *class; /**< Class for private options. */ |
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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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int height; /**< Height of the grab frame */ |
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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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XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm info */ |
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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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AVRational framerate; /**< Set by a private option. */ |
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int palette_changed; |
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uint32_t palette[256]; |
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Cursor c; |
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Window region_win; /**< This is used by show_region option. */ |
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} X11GrabContext; |
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#define REGION_WIN_BORDER 3 |
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/**
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* Draw grabbing region window |
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* |
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* @param s x11grab context |
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*/ |
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static void x11grab_draw_region_win(X11GrabContext *s) |
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{ |
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Display *dpy = s->dpy; |
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Window win = s->region_win; |
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int screen = DefaultScreen(dpy); |
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GC gc = XCreateGC(dpy, win, 0, 0); |
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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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XDrawRectangle(dpy, win, gc, 1, 1, |
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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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* @param s x11grab context |
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*/ |
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static void x11grab_region_win_init(X11GrabContext *s) |
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{ |
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Display *dpy = s->dpy; |
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XRectangle rect; |
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XSetWindowAttributes attribs = { .override_redirect = True }; |
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int screen = DefaultScreen(dpy); |
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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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rect.x = 0; |
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rect.y = 0; |
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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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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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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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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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*pix_fmt = AV_PIX_FMT_NONE; |
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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: |
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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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} |
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break; |
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} |
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if (*pix_fmt == AV_PIX_FMT_NONE) { |
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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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/**
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* Initialize the x11 grab device demuxer (public device demuxer API). |
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* |
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* @param s1 Context from avformat core |
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* @return <ul> |
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* <li>AVERROR(ENOMEM) no memory left</li> |
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* <li>AVERROR(EIO) other failure case</li> |
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* <li>0 success</li> |
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* </ul> |
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*/ |
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static int x11grab_read_header(AVFormatContext *s1) |
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{ |
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X11GrabContext *x11grab = s1->priv_data; |
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Display *dpy; |
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AVStream *st = NULL; |
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XImage *image; |
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int x_off = 0, y_off = 0, ret = 0, screen, use_shm = 0; |
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char *dpyname, *offset; |
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Colormap color_map; |
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XColor color[256]; |
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int i; |
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dpyname = av_strdup(s1->filename); |
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if (!dpyname) |
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goto out; |
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offset = strchr(dpyname, '+'); |
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if (offset) { |
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sscanf(offset, "%d,%d", &x_off, &y_off); |
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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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} |
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*offset = 0; |
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} |
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av_log(s1, AV_LOG_INFO, |
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"device: %s -> display: %s x: %d y: %d width: %d height: %d\n", |
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s1->filename, dpyname, x_off, y_off, x11grab->width, x11grab->height); |
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dpy = XOpenDisplay(dpyname); |
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av_freep(&dpyname); |
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if (!dpy) { |
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av_log(s1, AV_LOG_ERROR, "Could not open X display.\n"); |
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ret = AVERROR(EIO); |
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goto out; |
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} |
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st = avformat_new_stream(s1, NULL); |
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if (!st) { |
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ret = AVERROR(ENOMEM); |
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goto out; |
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} |
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avpriv_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ |
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screen = DefaultScreen(dpy); |
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if (x11grab->follow_mouse) { |
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int screen_w, screen_h; |
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Window w; |
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screen_w = DisplayWidth(dpy, screen); |
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screen_h = DisplayHeight(dpy, screen); |
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XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off, |
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&ret, &ret, &ret); |
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x_off -= x11grab->width / 2; |
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y_off -= x11grab->height / 2; |
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x_off = av_clip(x_off, 0, screen_w - x11grab->width); |
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y_off = av_clip(y_off, 0, screen_h - x11grab->height); |
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av_log(s1, AV_LOG_INFO, |
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"followmouse is enabled, resetting grabbing region to x: %d y: %d\n", |
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x_off, y_off); |
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} |
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if (x11grab->use_shm) { |
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use_shm = XShmQueryExtension(dpy); |
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av_log(s1, AV_LOG_INFO, |
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"shared memory extension %sfound\n", use_shm ? "" : "not "); |
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} |
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if (use_shm && setup_shm(s1, dpy, &image) < 0) { |
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av_log(s1, AV_LOG_WARNING, "Falling back to XGetImage\n"); |
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use_shm = 0; |
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} |
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if (!use_shm) { |
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image = XGetImage(dpy, RootWindow(dpy, screen), |
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x_off, y_off, |
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x11grab->width, x11grab->height, |
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AllPlanes, ZPixmap); |
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} |
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if (x11grab->draw_mouse && setup_mouse(dpy, screen) < 0) { |
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av_log(s1, AV_LOG_WARNING, |
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"XFixes not available, cannot draw the mouse cursor\n"); |
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x11grab->draw_mouse = 0; |
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} |
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x11grab->frame_size = x11grab->width * x11grab->height * image->bits_per_pixel / 8; |
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x11grab->dpy = dpy; |
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x11grab->time_base = av_inv_q(x11grab->framerate); |
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x11grab->time_frame = av_gettime() / av_q2d(x11grab->time_base); |
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x11grab->x_off = x_off; |
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x11grab->y_off = y_off; |
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x11grab->image = image; |
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x11grab->use_shm = use_shm; |
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ret = pixfmt_from_image(s1, image, &st->codecpar->format); |
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if (ret < 0) |
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goto out; |
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if (st->codecpar->format == AV_PIX_FMT_PAL8) { |
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color_map = DefaultColormap(dpy, screen); |
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for (i = 0; i < 256; ++i) |
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color[i].pixel = i; |
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XQueryColors(dpy, color_map, color, 256); |
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for (i = 0; i < 256; ++i) |
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x11grab->palette[i] = (color[i].red & 0xFF00) << 8 | |
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(color[i].green & 0xFF00) | |
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(color[i].blue & 0xFF00) >> 8; |
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x11grab->palette_changed = 1; |
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} |
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st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO; |
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st->codecpar->codec_id = AV_CODEC_ID_RAWVIDEO; |
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st->codecpar->width = x11grab->width; |
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st->codecpar->height = x11grab->height; |
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st->codecpar->bit_rate = x11grab->frame_size * 1 / av_q2d(x11grab->time_base) * 8; |
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st->avg_frame_rate = av_inv_q(x11grab->time_base); |
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out: |
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av_free(dpyname); |
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return ret; |
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} |
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/**
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* Paint a mouse pointer in an X11 image. |
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* |
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* @param image image to paint the mouse pointer to |
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* @param s context used to retrieve original grabbing rectangle |
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* coordinates |
|
||||||
*/ |
|
||||||
static void paint_mouse_pointer(XImage *image, AVFormatContext *s1) |
|
||||||
{ |
|
||||||
X11GrabContext *s = s1->priv_data; |
|
||||||
int x_off = s->x_off; |
|
||||||
int y_off = s->y_off; |
|
||||||
int width = s->width; |
|
||||||
int height = s->height; |
|
||||||
Display *dpy = s->dpy; |
|
||||||
XFixesCursorImage *xcim; |
|
||||||
int x, y; |
|
||||||
int line, column; |
|
||||||
int to_line, to_column; |
|
||||||
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; |
|
||||||
Window root; |
|
||||||
XSetWindowAttributes attr; |
|
||||||
|
|
||||||
/* Code doesn't currently support 16-bit or PAL8 */ |
|
||||||
if (image->bits_per_pixel != 24 && image->bits_per_pixel != 32) |
|
||||||
return; |
|
||||||
|
|
||||||
if (!s->c) |
|
||||||
s->c = XCreateFontCursor(dpy, XC_left_ptr); |
|
||||||
root = DefaultRootWindow(dpy); |
|
||||||
attr.cursor = s->c; |
|
||||||
XChangeWindowAttributes(dpy, root, CWCursor, &attr); |
|
||||||
|
|
||||||
xcim = XFixesGetCursorImage(dpy); |
|
||||||
if (!xcim) { |
|
||||||
av_log(s1, AV_LOG_WARNING, |
|
||||||
"XFixesGetCursorImage failed\n"); |
|
||||||
return; |
|
||||||
} |
|
||||||
|
|
||||||
x = xcim->x - xcim->xhot; |
|
||||||
y = xcim->y - xcim->yhot; |
|
||||||
|
|
||||||
to_line = FFMIN((y + xcim->height), (height + y_off)); |
|
||||||
to_column = FFMIN((x + xcim->width), (width + x_off)); |
|
||||||
|
|
||||||
for (line = FFMAX(y, y_off); line < to_line; line++) { |
|
||||||
for (column = FFMAX(x, x_off); column < to_column; column++) { |
|
||||||
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); |
|
||||||
|
|
||||||
if (a == 255) { |
|
||||||
pix[image_addr + 0] = r; |
|
||||||
pix[image_addr + 1] = g; |
|
||||||
pix[image_addr + 2] = b; |
|
||||||
} else if (a) { |
|
||||||
/* pixel values from XFixesGetCursorImage come premultiplied by alpha */ |
|
||||||
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; |
|
||||||
} |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
XFree(xcim); |
|
||||||
xcim = NULL; |
|
||||||
} |
|
||||||
|
|
||||||
/**
|
|
||||||
* Read new data in the image structure. |
|
||||||
* |
|
||||||
* @param dpy X11 display to grab from |
|
||||||
* @param d |
|
||||||
* @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 |
|
||||||
*/ |
|
||||||
static int xget_zpixmap(Display *dpy, Drawable d, XImage *image, int x, int y) |
|
||||||
{ |
|
||||||
xGetImageReply rep; |
|
||||||
xGetImageReq *req; |
|
||||||
long nbytes; |
|
||||||
|
|
||||||
if (!image) |
|
||||||
return 0; |
|
||||||
|
|
||||||
LockDisplay(dpy); |
|
||||||
GetReq(GetImage, req); |
|
||||||
|
|
||||||
/* First set up the standard stuff in the request */ |
|
||||||
req->drawable = d; |
|
||||||
req->x = x; |
|
||||||
req->y = y; |
|
||||||
req->width = image->width; |
|
||||||
req->height = image->height; |
|
||||||
req->planeMask = (unsigned int)AllPlanes; |
|
||||||
req->format = ZPixmap; |
|
||||||
|
|
||||||
if (!_XReply(dpy, (xReply *)&rep, 0, xFalse) || !rep.length) { |
|
||||||
UnlockDisplay(dpy); |
|
||||||
SyncHandle(); |
|
||||||
return 0; |
|
||||||
} |
|
||||||
|
|
||||||
nbytes = (long)rep.length << 2; |
|
||||||
_XReadPad(dpy, image->data, nbytes); |
|
||||||
|
|
||||||
UnlockDisplay(dpy); |
|
||||||
SyncHandle(); |
|
||||||
return 1; |
|
||||||
} |
|
||||||
|
|
||||||
/**
|
|
||||||
* Grab a frame from x11 (public device demuxer API). |
|
||||||
* |
|
||||||
* @param s1 Context from avformat core |
|
||||||
* @param pkt Packet holding the brabbed frame |
|
||||||
* @return frame size in bytes |
|
||||||
*/ |
|
||||||
static int x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt) |
|
||||||
{ |
|
||||||
X11GrabContext *s = s1->priv_data; |
|
||||||
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; |
|
||||||
int screen, pointer_x, pointer_y, _, same_screen = 1; |
|
||||||
Window w, root; |
|
||||||
int64_t curtime, delay; |
|
||||||
struct timespec ts; |
|
||||||
|
|
||||||
/* wait based on the frame rate */ |
|
||||||
for (;;) { |
|
||||||
curtime = av_gettime(); |
|
||||||
delay = s->time_frame * av_q2d(s->time_base) - curtime; |
|
||||||
if (delay <= 0) { |
|
||||||
break; |
|
||||||
} |
|
||||||
ts.tv_sec = delay / 1000000; |
|
||||||
ts.tv_nsec = (delay % 1000000) * 1000; |
|
||||||
nanosleep(&ts, NULL); |
|
||||||
} |
|
||||||
|
|
||||||
/* 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); |
|
||||||
|
|
||||||
pkt->data = image->data; |
|
||||||
pkt->size = s->frame_size; |
|
||||||
pkt->pts = curtime; |
|
||||||
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; |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
screen = DefaultScreen(dpy); |
|
||||||
root = RootWindow(dpy, screen); |
|
||||||
|
|
||||||
if (follow_mouse || s->draw_mouse) |
|
||||||
same_screen = XQueryPointer(dpy, root, &w, &w, |
|
||||||
&pointer_x, &pointer_y, &_, &_, &_); |
|
||||||
|
|
||||||
if (follow_mouse && same_screen) { |
|
||||||
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
|
|
||||||
x_off += pointer_x - s->width / 2 - x_off; |
|
||||||
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.
|
|
||||||
if (pointer_x > x_off + s->width - follow_mouse) |
|
||||||
x_off += pointer_x - (x_off + s->width - follow_mouse); |
|
||||||
else if (pointer_x < x_off + follow_mouse) |
|
||||||
x_off -= (x_off + follow_mouse) - pointer_x; |
|
||||||
if (pointer_y > y_off + s->height - follow_mouse) |
|
||||||
y_off += pointer_y - (y_off + s->height - follow_mouse); |
|
||||||
else if (pointer_y < y_off + follow_mouse) |
|
||||||
y_off -= (y_off + follow_mouse) - pointer_y; |
|
||||||
} |
|
||||||
// adjust grabbing region position if it goes out of screen.
|
|
||||||
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); |
|
||||||
|
|
||||||
if (s->show_region && s->region_win) |
|
||||||
XMoveWindow(dpy, s->region_win, |
|
||||||
s->x_off - REGION_WIN_BORDER, |
|
||||||
s->y_off - REGION_WIN_BORDER); |
|
||||||
} |
|
||||||
|
|
||||||
if (s->show_region && same_screen) { |
|
||||||
if (s->region_win) { |
|
||||||
XEvent evt = { .type = NoEventMask }; |
|
||||||
// Clean up the events, and do the initial draw or redraw.
|
|
||||||
while (XCheckMaskEvent(dpy, ExposureMask | StructureNotifyMask, |
|
||||||
&evt)) |
|
||||||
; |
|
||||||
if (evt.type) |
|
||||||
x11grab_draw_region_win(s); |
|
||||||
} else { |
|
||||||
x11grab_region_win_init(s); |
|
||||||
} |
|
||||||
} |
|
||||||
|
|
||||||
if (s->use_shm) { |
|
||||||
if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes)) |
|
||||||
av_log(s1, AV_LOG_INFO, "XShmGetImage() failed\n"); |
|
||||||
} else { |
|
||||||
if (!xget_zpixmap(dpy, root, image, x_off, y_off)) |
|
||||||
av_log(s1, AV_LOG_INFO, "XGetZPixmap() failed\n"); |
|
||||||
} |
|
||||||
|
|
||||||
if (s->draw_mouse && same_screen) |
|
||||||
paint_mouse_pointer(image, s1); |
|
||||||
|
|
||||||
return s->frame_size; |
|
||||||
} |
|
||||||
|
|
||||||
/**
|
|
||||||
* Close x11 frame grabber (public device demuxer API). |
|
||||||
* |
|
||||||
* @param s1 Context from avformat core |
|
||||||
* @return 0 success, !0 failure |
|
||||||
*/ |
|
||||||
static int x11grab_read_close(AVFormatContext *s1) |
|
||||||
{ |
|
||||||
X11GrabContext *x11grab = s1->priv_data; |
|
||||||
|
|
||||||
/* 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; |
|
||||||
} |
|
||||||
|
|
||||||
if (x11grab->region_win) |
|
||||||
XDestroyWindow(x11grab->dpy, x11grab->region_win); |
|
||||||
|
|
||||||
/* Free X11 display */ |
|
||||||
XCloseDisplay(x11grab->dpy); |
|
||||||
return 0; |
|
||||||
} |
|
||||||
|
|
||||||
#define OFFSET(x) offsetof(X11GrabContext, x) |
|
||||||
#define DEC AV_OPT_FLAG_DECODING_PARAM |
|
||||||
static const AVOption options[] = { |
|
||||||
{ "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 }, |
|
||||||
{ "draw_mouse", "draw the mouse pointer", OFFSET(draw_mouse), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC }, |
|
||||||
|
|
||||||
{ "follow_mouse", "move the grabbing region when the mouse pointer reaches within specified amount of pixels to the edge of region", |
|
||||||
OFFSET(follow_mouse), AV_OPT_TYPE_INT, {.i64 = 0}, -1, INT_MAX, DEC, "follow_mouse" }, |
|
||||||
{ "centered", "keep the mouse pointer at the center of grabbing region when following", |
|
||||||
0, AV_OPT_TYPE_CONST, {.i64 = -1}, INT_MIN, INT_MAX, DEC, "follow_mouse" }, |
|
||||||
|
|
||||||
{ "framerate", "set video frame rate", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "ntsc"}, 0, INT_MAX, DEC }, |
|
||||||
{ "show_region", "show the grabbing region", OFFSET(show_region), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, DEC }, |
|
||||||
{ "video_size", "set video frame size", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = "vga"}, 0, 0, DEC }, |
|
||||||
{ "use_shm", "use MIT-SHM extension", OFFSET(use_shm), AV_OPT_TYPE_INT, {.i64 = 1}, 0, 1, DEC }, |
|
||||||
{ NULL }, |
|
||||||
}; |
|
||||||
|
|
||||||
static const AVClass x11_class = { |
|
||||||
.class_name = "X11grab indev", |
|
||||||
.item_name = av_default_item_name, |
|
||||||
.option = options, |
|
||||||
.version = LIBAVUTIL_VERSION_INT, |
|
||||||
.category = AV_CLASS_CATEGORY_DEVICE_VIDEO_INPUT, |
|
||||||
}; |
|
||||||
|
|
||||||
/** x11 grabber device demuxer declaration */ |
|
||||||
AVInputFormat ff_x11grab_demuxer = { |
|
||||||
.name = "x11grab", |
|
||||||
.long_name = NULL_IF_CONFIG_SMALL("X11grab"), |
|
||||||
.priv_data_size = sizeof(X11GrabContext), |
|
||||||
.read_header = x11grab_read_header, |
|
||||||
.read_packet = x11grab_read_packet, |
|
||||||
.read_close = x11grab_read_close, |
|
||||||
.flags = AVFMT_NOFILE, |
|
||||||
.priv_class = &x11_class, |
|
||||||
}; |
|
||||||
Loading…
Reference in new issue