diff options
Diffstat (limited to 'libavdevice/x11grab.c')
-rw-r--r-- | libavdevice/x11grab.c | 230 |
1 files changed, 175 insertions, 55 deletions
diff --git a/libavdevice/x11grab.c b/libavdevice/x11grab.c index 6e77a5c52a..c2a67d7e62 100644 --- a/libavdevice/x11grab.c +++ b/libavdevice/x11grab.c @@ -1,9 +1,9 @@ /* * X11 video grab interface * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav integration: + * FFmpeg integration: * Copyright (C) 2006 Clemens Fruhwirth <clemens@endorphin.org> * Edouard Gomez <ed.gomez@free.fr> * @@ -14,18 +14,18 @@ * Copyright (C) 1997-1998 Rasca, Berlin * 2003-2004 Karl H. Beckers, Frankfurt * - * Libav is free software; you can redistribute it and/or modify + * FFmpeg is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * - * Libav is distributed in the hope that it will be useful, + * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License - * along with Libav; if not, write to the Free Software + * along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -36,7 +36,6 @@ */ #include "config.h" -#include "libavformat/avformat.h" #include "libavutil/log.h" #include "libavutil/opt.h" #include "libavutil/parseutils.h" @@ -47,8 +46,10 @@ #include <X11/Xproto.h> #include <X11/Xutil.h> #include <sys/shm.h> +#include <X11/extensions/shape.h> #include <X11/extensions/XShm.h> #include <X11/extensions/Xfixes.h> +#include "avdevice.h" /** * X11 Device Demuxer context @@ -70,10 +71,75 @@ struct x11_grab XImage *image; /**< X11 image holding the grab */ int use_shm; /**< !0 when using XShm extension */ XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */ - int nomouse; + int draw_mouse; /**< Set by a private option. */ + int follow_mouse; /**< Set by a private option. */ + int show_region; /**< set by a private option. */ char *framerate; /**< Set by a private option. */ + + Window region_win; /**< This is used by show_region option. */ }; +#define REGION_WIN_BORDER 3 +/** + * Draw grabbing region window + * + * @param s x11_grab context + */ +static void +x11grab_draw_region_win(struct x11_grab *s) +{ + Display *dpy = s->dpy; + int screen; + Window win = s->region_win; + GC gc; + + screen = DefaultScreen(dpy); + gc = XCreateGC(dpy, win, 0, 0); + XSetForeground(dpy, gc, WhitePixel(dpy, screen)); + XSetBackground(dpy, gc, BlackPixel(dpy, screen)); + XSetLineAttributes(dpy, gc, REGION_WIN_BORDER, LineDoubleDash, 0, 0); + XDrawRectangle(dpy, win, gc, + 1, 1, + (s->width + REGION_WIN_BORDER * 2) - 1 * 2 - 1, + (s->height + REGION_WIN_BORDER * 2) - 1 * 2 - 1); + XFreeGC(dpy, gc); +} + +/** + * Initialize grabbing region window + * + * @param s x11_grab context + */ +static void +x11grab_region_win_init(struct x11_grab *s) +{ + Display *dpy = s->dpy; + int screen; + XSetWindowAttributes attribs; + XRectangle rect; + + screen = DefaultScreen(dpy); + attribs.override_redirect = True; + s->region_win = XCreateWindow(dpy, RootWindow(dpy, screen), + s->x_off - REGION_WIN_BORDER, + s->y_off - REGION_WIN_BORDER, + s->width + REGION_WIN_BORDER * 2, + s->height + REGION_WIN_BORDER * 2, + 0, CopyFromParent, + InputOutput, CopyFromParent, + CWOverrideRedirect, &attribs); + rect.x = 0; + rect.y = 0; + rect.width = s->width; + rect.height = s->height; + XShapeCombineRectangles(dpy, s->region_win, + ShapeBounding, REGION_WIN_BORDER, REGION_WIN_BORDER, + &rect, 1, ShapeSubtract, 0); + XMapWindow(dpy, s->region_win); + XSelectInput(dpy, s->region_win, ExposureMask | StructureNotifyMask); + x11grab_draw_region_win(s); +} + /** * Initialize the x11 grab device demuxer (public device demuxer API). * @@ -95,16 +161,17 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) XImage *image; int x_off = 0; int y_off = 0; + int screen; int use_shm; - char *param, *offset; + char *dpyname, *offset; int ret = 0; AVRational framerate; - param = av_strdup(s1->filename); - offset = strchr(param, '+'); + dpyname = av_strdup(s1->filename); + offset = strchr(dpyname, '+'); if (offset) { sscanf(offset, "%d,%d", &x_off, &y_off); - x11grab->nomouse= strstr(offset, "nomouse"); + x11grab->draw_mouse = !strstr(offset, "nomouse"); *offset= 0; } @@ -116,33 +183,42 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) av_log(s1, AV_LOG_ERROR, "Could not parse framerate: %s.\n", x11grab->framerate); goto out; } -#if FF_API_FORMAT_PARAMETERS - if (ap->width > 0) - x11grab->width = ap->width; - if (ap->height > 0) - x11grab->height = ap->height; - if (ap->time_base.num) - framerate = (AVRational){ap->time_base.den, ap->time_base.num}; -#endif av_log(s1, AV_LOG_INFO, "device: %s -> display: %s x: %d y: %d width: %d height: %d\n", - s1->filename, param, x_off, y_off, x11grab->width, x11grab->height); + s1->filename, dpyname, x_off, y_off, x11grab->width, x11grab->height); - dpy = XOpenDisplay(param); + dpy = XOpenDisplay(dpyname); + av_freep(&dpyname); if(!dpy) { av_log(s1, AV_LOG_ERROR, "Could not open X display.\n"); ret = AVERROR(EIO); goto out; } - st = av_new_stream(s1, 0); + st = avformat_new_stream(s1, NULL); if (!st) { ret = AVERROR(ENOMEM); goto out; } av_set_pts_info(st, 64, 1, 1000000); /* 64 bits pts in us */ + screen = DefaultScreen(dpy); + + if (x11grab->follow_mouse) { + int screen_w, screen_h; + Window w; + + screen_w = DisplayWidth(dpy, screen); + screen_h = DisplayHeight(dpy, screen); + XQueryPointer(dpy, RootWindow(dpy, screen), &w, &w, &x_off, &y_off, &ret, &ret, &ret); + x_off -= x11grab->width / 2; + y_off -= x11grab->height / 2; + x_off = FFMIN(FFMAX(x_off, 0), screen_w - x11grab->width); + y_off = FFMIN(FFMAX(y_off, 0), screen_h - x11grab->height); + av_log(s1, AV_LOG_INFO, "followmouse is enabled, resetting grabbing region to x: %d y: %d\n", x_off, y_off); + } + use_shm = XShmQueryExtension(dpy); - av_log(s1, AV_LOG_INFO, "shared memory extension %s found\n", use_shm ? "" : "not"); + av_log(s1, AV_LOG_INFO, "shared memory extension%s found\n", use_shm ? "" : " not"); if(use_shm) { int scr = XDefaultScreen(dpy); @@ -171,7 +247,7 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) goto out; } } else { - image = XGetImage(dpy, RootWindow(dpy, DefaultScreen(dpy)), + image = XGetImage(dpy, RootWindow(dpy, screen), x_off,y_off, x11grab->width, x11grab->height, AllPlanes, ZPixmap); @@ -217,21 +293,6 @@ x11grab_read_header(AVFormatContext *s1, AVFormatParameters *ap) } break; case 32: -#if 0 - GetColorInfo (image, &c_info); - if ( c_info.alpha_mask == 0xff000000 && image->green_mask == 0x0000ff00) { - /* byte order is relevant here, not endianness - * endianness is handled by avcodec, but atm no such thing - * as having ABGR, instead of ARGB in a word. Since we - * need this for Solaris/SPARC, but need to do the conversion - * for every frame we do it outside of this loop, cf. below - * this matches both ARGB32 and ABGR32 */ - input_pixfmt = PIX_FMT_ARGB32; - } else { - av_log(s1, AV_LOG_ERROR,"image depth %i not supported ... aborting\n", image->bits_per_pixel); - return AVERROR(EIO); - } -#endif input_pixfmt = PIX_FMT_RGB32; break; default: @@ -389,6 +450,10 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt) int x_off = s->x_off; int y_off = s->y_off; + int screen; + Window root; + int follow_mouse = s->follow_mouse; + int64_t curtime, delay; struct timespec ts; @@ -415,17 +480,65 @@ x11grab_read_packet(AVFormatContext *s1, AVPacket *pkt) pkt->size = s->frame_size; pkt->pts = curtime; + screen = DefaultScreen(dpy); + root = RootWindow(dpy, screen); + if (follow_mouse) { + int screen_w, screen_h; + int pointer_x, pointer_y, _; + Window w; + + screen_w = DisplayWidth(dpy, screen); + screen_h = DisplayHeight(dpy, screen); + XQueryPointer(dpy, root, &w, &w, &pointer_x, &pointer_y, &_, &_, &_); + 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 = FFMIN(FFMAX(x_off, 0), screen_w - s->width); + s->y_off = y_off = FFMIN(FFMAX(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) { + if (s->region_win) { + XEvent evt; + // clean up the events, and do the initinal draw or redraw. + for (evt.type = NoEventMask; 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, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off, AllPlanes)) { + if (!XShmGetImage(dpy, root, image, x_off, y_off, AllPlanes)) { av_log (s1, AV_LOG_INFO, "XShmGetImage() failed\n"); } } else { - if (!xget_zpixmap(dpy, RootWindow(dpy, DefaultScreen(dpy)), image, x_off, y_off)) { + if (!xget_zpixmap(dpy, root, image, x_off, y_off)) { av_log (s1, AV_LOG_INFO, "XGetZPixmap() failed\n"); } } - if(!s->nomouse){ + if (s->draw_mouse) { paint_mouse_pointer(image, s); } @@ -456,6 +569,10 @@ x11grab_read_close(AVFormatContext *s1) x11grab->image = NULL; } + if (x11grab->region_win) { + XDestroyWindow(x11grab->dpy, x11grab->region_win); + } + /* Free X11 display */ XCloseDisplay(x11grab->dpy); return 0; @@ -464,8 +581,13 @@ x11grab_read_close(AVFormatContext *s1) #define OFFSET(x) offsetof(struct x11_grab, x) #define DEC AV_OPT_FLAG_DECODING_PARAM static const AVOption options[] = { - { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), FF_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC }, - { "framerate", "", OFFSET(framerate), FF_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, + { "video_size", "A string describing frame size, such as 640x480 or hd720.", OFFSET(video_size), AV_OPT_TYPE_STRING, {.str = "vga"}, 0, 0, DEC }, + { "framerate", "", OFFSET(framerate), AV_OPT_TYPE_STRING, {.str = "ntsc"}, 0, 0, DEC }, + { "draw_mouse", "Draw the mouse pointer.", OFFSET(draw_mouse), AV_OPT_TYPE_INT, { 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, { 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, { -1 }, INT_MIN, INT_MAX, DEC, "follow_mouse" }, + { "show_region", "Show the grabbing region.", OFFSET(show_region), AV_OPT_TYPE_INT, { 0 }, 0, 1, DEC }, { NULL }, }; @@ -477,15 +599,13 @@ static const AVClass x11_class = { }; /** x11 grabber device demuxer declaration */ -AVInputFormat ff_x11_grab_device_demuxer = -{ - "x11grab", - NULL_IF_CONFIG_SMALL("X11grab"), - sizeof(struct x11_grab), - NULL, - x11grab_read_header, - x11grab_read_packet, - x11grab_read_close, - .flags = AVFMT_NOFILE, - .priv_class = &x11_class, +AVInputFormat ff_x11_grab_device_demuxer = { + .name = "x11grab", + .long_name = NULL_IF_CONFIG_SMALL("X11grab"), + .priv_data_size = sizeof(struct x11_grab), + .read_header = x11grab_read_header, + .read_packet = x11grab_read_packet, + .read_close = x11grab_read_close, + .flags = AVFMT_NOFILE, + .priv_class = &x11_class, }; |