#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"
int use_shm; /**< !0 when using XShm extension */
XShmSegmentInfo shminfo; /**< When using XShm, keeps track of XShm infos */
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).
*
XImage *image;
int x_off = 0;
int y_off = 0;
+ int screen;
int use_shm;
char *dpyname, *offset;
int ret = 0;
}
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");
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);
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;
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");
}
}
x11grab->image = NULL;
}
+ if (x11grab->region_win) {
+ XDestroyWindow(x11grab->dpy, x11grab->region_win);
+ }
+
/* Free X11 display */
XCloseDisplay(x11grab->dpy);
return 0;
{ "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 },
{ "draw_mouse", "Draw the mouse pointer.", OFFSET(draw_mouse), FF_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), FF_OPT_TYPE_INT, { 0 }, -1, INT_MAX, DEC, "follow_mouse" },
+ { "centered", "Keep the mouse pointer at the center of grabbing region when following.", 0, FF_OPT_TYPE_CONST, { -1 }, INT_MIN, INT_MAX, DEC, "follow_mouse" },
+ { "show_region", "Show the grabbing region.", OFFSET(show_region), FF_OPT_TYPE_INT, { 0 }, 0, 1, DEC },
{ NULL },
};
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