+++ /dev/null
-/* G-Streamer X11 Window event/motion listener
- * Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
- *
- * xwindowlistener.c: implementation of the object
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library 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
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include <gst/gst.h>
-#include "xwindowlistener.h"
-
-#define NUM_CLIPS 1024
-
-static void gst_x_window_listener_class_init (GstXWindowListenerClass * klass);
-static void gst_x_window_listener_init (GstXWindowListener * xwin);
-static void gst_x_window_listener_dispose (GObject * object);
-
-static void gst_xwin_start (GstXWindowListener * xwin);
-static void gst_xwin_stop (GstXWindowListener * xwin);
-
-static GObjectClass *parent_class = NULL;
-
-GType
-gst_x_window_listener_get_type (void)
-{
- static GType x_window_listener_type = 0;
-
- if (!x_window_listener_type) {
- static const GTypeInfo x_window_listener_info = {
- sizeof (GstXWindowListenerClass),
- NULL,
- NULL,
- (GClassInitFunc) gst_x_window_listener_class_init,
- NULL,
- NULL,
- sizeof (GstXWindowListener),
- 0,
- (GInstanceInitFunc) gst_x_window_listener_init,
- NULL
- };
-
- x_window_listener_type =
- g_type_register_static (G_TYPE_OBJECT,
- "GstXWindowListener", &x_window_listener_info, 0);
- }
-
- return x_window_listener_type;
-}
-
-static void
-gst_x_window_listener_class_init (GstXWindowListenerClass * klass)
-{
- GObjectClass *object_klass = (GObjectClass *) klass;
-
- parent_class = g_type_class_ref (G_TYPE_OBJECT);
-
- object_klass->dispose = gst_x_window_listener_dispose;
-}
-
-static void
-gst_x_window_listener_init (GstXWindowListener * xwin)
-{
- xwin->xwindow_id = 0;
- xwin->display_name = NULL;
-
- xwin->map_window_func = NULL;
- xwin->set_window_func = NULL;
-
- xwin->thread = NULL;
-}
-
-static void
-gst_x_window_listener_dispose (GObject * object)
-{
- GstXWindowListener *xwin = GST_X_WINDOW_LISTENER (object);
-
- /* stop overlay */
- gst_x_window_listener_set_xid (xwin, 0);
-
- if (xwin->display_name) {
- g_free (xwin->display_name);
- xwin->display_name = NULL;
- }
-
- if (parent_class->dispose) {
- parent_class->dispose (object);
- }
-}
-
-GstXWindowListener *
-gst_x_window_listener_new (gchar * display,
- MapWindowFunc map_window_func,
- SetWindowFunc set_window_func, gpointer private_data)
-{
- GstXWindowListener *xwin = g_object_new (GST_TYPE_X_WINDOW_LISTENER, NULL);
-
- xwin->display_name = g_strdup (display);
- xwin->map_window_func = map_window_func;
- xwin->set_window_func = set_window_func;
- xwin->private_data = private_data;
-
- return xwin;
-}
-
-void
-gst_x_window_listener_set_xid (GstXWindowListener * xwin, XID id)
-{
- g_return_if_fail (xwin != NULL);
-
- if (id == xwin->xwindow_id) {
- return;
- }
-
- if (xwin->xwindow_id && xwin->thread) {
- gst_xwin_stop (xwin);
- }
-
- xwin->xwindow_id = id;
-
- if (xwin->xwindow_id && xwin->display_name && xwin->display_name[0] == ':') {
- g_return_if_fail (xwin->map_window_func != NULL);
- g_return_if_fail (xwin->set_window_func != NULL);
-
- gst_xwin_start (xwin);
- }
-}
-
-/*
- * The following code works as follows:
- * - the "client" (the one who uses this object) sets an XID
- * - we add a child XWindow to this XID, and follow motion/events
- * - after each event, we determine the position, size and clips
- * - next, we call the per-instance virtual functions set by the client
- * - and we do all this in an endless cycle
- *
- * This code originates largely from xawtv. By permission of Gerd Knorr
- * <kraxel@bytesex.org>, it was relicensed to LGPL.
- */
-
-#define DEBUG(...) \
- GST_DEBUG ("XWL: " __VA_ARGS__)
-
-static void
-gst_xwin_set_overlay (GstXWindowListener * xwin, gboolean on)
-{
- xwin->map_window_func (xwin->private_data, on);
-
- /* remember me */
- xwin->ov_visible = on;
-}
-
-static gboolean
-gst_xwin_refresh (gpointer data)
-{
- GstXWindowListener *xwin = GST_X_WINDOW_LISTENER (data);
- Window win, tmp;
- XSetWindowAttributes xswa;
- XWindowAttributes attr;
-
- g_mutex_lock (xwin->main_lock);
-
- win = DefaultRootWindow (xwin->main_display);
- XGetWindowAttributes (xwin->main_display, win, &attr);
-
- xwin->ov_refresh_id = 0;
-
- if (!xwin->ov_move && xwin->ov_map &&
- xwin->ov_visibility == VisibilityUnobscured) {
- g_mutex_unlock (xwin->main_lock);
- return FALSE; /* skip */
- }
-
- if (xwin->ov_map && xwin->ov_visibility != VisibilityFullyObscured) {
- xwin->ov_refresh = TRUE;
- }
-
- xswa.override_redirect = True;
- xswa.backing_store = NotUseful;
- xswa.save_under = False;
- tmp = XCreateWindow (xwin->main_display, win, 0, 0,
- attr.width, attr.height, 0,
- CopyFromParent, InputOutput, CopyFromParent,
- (CWSaveUnder | CWBackingStore | CWOverrideRedirect), &xswa);
- XMapWindow (xwin->main_display, tmp);
- XUnmapWindow (xwin->main_display, tmp);
- XDestroyWindow (xwin->main_display, tmp);
- xwin->ov_move = FALSE;
-
- g_mutex_unlock (xwin->main_lock);
-
- /* once */
- return FALSE;
-}
-
-static int
-x11_error_dev_null (Display * display, XErrorEvent * event)
-{
- return 0;
-}
-
-#define ADD_CLIP(_x, _y, _w, _h) \
- do { \
- GstXWindowClip *clip = &xwin->clips[xwin->num_clips++]; \
- clip->x_offset = _x; \
- clip->y_offset = _y; \
- clip->width = _w; \
- clip->height = _h; \
- clip->data = NULL; \
- } while (0);
-
-static void
-gst_xwin_set_clips (GstXWindowListener * xwin)
-{
- Window root, rroot, parent, *kids, me;
- XWindowAttributes attr;
- guint numkids;
- gint i;
- gint x1, y1, w1, h1;
- XErrorHandler old_handler;
-
- old_handler = XSetErrorHandler (x11_error_dev_null);
-
- if (xwin->num_clips != 0)
- xwin->ov_conf = TRUE;
- xwin->num_clips = 0;
-
- root = DefaultRootWindow (xwin->display);
- XGetWindowAttributes (xwin->display, root, &attr);
-
- if (xwin->x < 0)
- ADD_CLIP (0, 0, -xwin->x, xwin->h);
- if (xwin->y < 0)
- ADD_CLIP (0, 0, xwin->w, -xwin->y);
- if ((xwin->x + xwin->w) > attr.width)
- ADD_CLIP (attr.width - xwin->x, 0, xwin->w, xwin->h);
- if ((xwin->y + xwin->h) > attr.height)
- ADD_CLIP (0, attr.height - xwin->y, xwin->w, xwin->h);
-
- me = xwin->child;
- while (1) {
- XQueryTree (xwin->display, me, &rroot, &parent, &kids, &numkids);
- if (numkids)
- XFree (kids);
- if (root == parent)
- break;
- me = parent;
- }
-
- XQueryTree (xwin->display, root, &rroot, &parent, &kids, &numkids);
- for (i = 0; i < numkids; i++)
- if (kids[i] == me)
- break;
-
- for (i++; i < numkids; i++) {
- XGetWindowAttributes (xwin->display, kids[i], &attr);
- if (attr.map_state != IsViewable)
- continue;
-
- x1 = attr.x - xwin->x;
- y1 = attr.y - xwin->y;
- w1 = attr.width + 2 * attr.border_width;
- h1 = attr.height + 2 * attr.border_width;
- if (((x1 + w1) < 0) || (x1 > xwin->w) || ((y1 + h1) < 0) || (y1 > xwin->h))
- continue;
-
- if (x1 < 0)
- x1 = 0;
- if (y1 < 0)
- y1 = 0;
- ADD_CLIP (x1, y1, w1, h1);
- }
- XFree (kids);
-
- if (xwin->num_clips != 0)
- xwin->ov_conf = TRUE;
-
- XSetErrorHandler (old_handler);
-}
-
-
-static gboolean
-gst_xwin_window (GstXWindowListener * xwin)
-{
- if (xwin->ov_map && xwin->ov_wmmap &&
- xwin->ov_visibility != VisibilityFullyObscured) {
- /* visible */
- if (xwin->ov_visibility == VisibilityPartiallyObscured) {
- /* set clips */
- gst_xwin_set_clips (xwin);
- }
-
- if (xwin->ov_conf) {
- xwin->set_window_func (xwin->private_data,
- xwin->x, xwin->y, xwin->w, xwin->h, xwin->clips, xwin->num_clips);
-
- if (!xwin->ov_visible)
- gst_xwin_set_overlay (xwin, TRUE);
-
- g_mutex_lock (xwin->main_lock);
-
- if (xwin->ov_refresh_id)
- g_source_remove (xwin->ov_refresh_id);
- xwin->ov_refresh_id =
- g_timeout_add (200, (GSourceFunc) gst_xwin_refresh, (gpointer) xwin);
-
- xwin->ov_conf = FALSE;
-
- g_mutex_unlock (xwin->main_lock);
- }
- } else {
- /* not visible */
- if (xwin->ov_conf && xwin->ov_visible) {
- gst_xwin_set_overlay (xwin, FALSE);
-
- g_mutex_lock (xwin->main_lock);
-
- if (xwin->ov_refresh_id)
- g_source_remove (xwin->ov_refresh_id);
- xwin->ov_refresh_id =
- g_timeout_add (200, (GSourceFunc) gst_xwin_refresh, (gpointer) xwin);
-
- xwin->ov_conf = FALSE;
-
- g_mutex_unlock (xwin->main_lock);
- }
- }
-
- xwin->ov_conf_id = 0;
-
- /* once is enough */
- return FALSE;
-}
-
-static void
-gst_xwin_configure (GstXWindowListener * xwin)
-{
-#if 0
- /* This part is disabled, because the idle task will be done
- * in the main thread instead of here. */
- if (!xwin->ov_conf_id)
- xwin->ov_conf_id =
- g_idle_add ((GSourceFunc) gst_rec_xoverlay_window, (gpointer) xwin);
-#endif
-
- gst_xwin_window ((gpointer) xwin);
-}
-
-static void
-gst_xwin_resize (GstXWindowListener * xwin)
-{
- Drawable drawable, parent, *kids, root;
- guint numkids;
- XWindowAttributes attr;
-
- XGetWindowAttributes (xwin->display, xwin->xwindow_id, &attr);
- XMoveResizeWindow (xwin->display, xwin->child, 0, 0, attr.width, attr.height);
-
- /* set the video window - the first clip is our own window */
- xwin->x = 0;
- xwin->y = 0;
- xwin->w = attr.width;
- xwin->h = attr.height;
-
- drawable = xwin->child;
- while (1) {
- XQueryTree (xwin->display, drawable, &root, &parent, &kids, &numkids);
- if (numkids)
- XFree (kids);
- drawable = parent;
- XGetWindowAttributes (xwin->display, drawable, &attr);
- xwin->x += attr.x;
- xwin->y += attr.y;
- if (parent == attr.root)
- break;
- }
-
- xwin->ov_conf = TRUE;
- xwin->ov_move = TRUE;
-
- gst_xwin_configure (xwin);
-}
-
-static void
-gst_xwin_init_window (GstXWindowListener * xwin)
-{
- XWindowAttributes attr;
-
- /* start values */
- xwin->ov_conf = TRUE;
- xwin->ov_map = xwin->ov_wmmap = TRUE;
- xwin->ov_move = TRUE;
- xwin->ov_refresh = FALSE;
- g_mutex_lock (xwin->main_lock);
- xwin->ov_conf_id = xwin->ov_refresh_id = 0;
- g_mutex_unlock (xwin->main_lock);
- xwin->ov_visibility = VisibilityFullyObscured;
-
- /* start the memory that we'll use */
- xwin->clips = g_malloc (sizeof (GstXWindowClip) * NUM_CLIPS);
- xwin->num_clips = 0;
-
- /* open connection to X server */
- xwin->display = XOpenDisplay (xwin->display_name);
-
- /* window */
- XGetWindowAttributes (xwin->display, xwin->xwindow_id, &attr);
- xwin->child = XCreateSimpleWindow (xwin->display,
- xwin->xwindow_id, 0, 0, attr.width, attr.height, 0, 0, 0);
-
- /* listen to certain X events */
- XSelectInput (xwin->display, xwin->xwindow_id, StructureNotifyMask);
- XSelectInput (xwin->display, xwin->child,
- VisibilityChangeMask | StructureNotifyMask);
- XSelectInput (xwin->display, DefaultRootWindow (xwin->display),
- VisibilityChangeMask | StructureNotifyMask | SubstructureNotifyMask);
-
- /* show */
- XMapWindow (xwin->display, xwin->child);
-
- gst_xwin_resize (xwin);
-}
-
-static void
-gst_xwin_exit_window (GstXWindowListener * xwin)
-{
- /* disable overlay */
- gst_xwin_set_overlay (xwin, FALSE);
-
- /* delete idle funcs */
- if (xwin->ov_conf_id != 0)
- g_source_remove (xwin->ov_conf_id);
-
- g_mutex_lock (xwin->main_lock);
- if (xwin->ov_refresh_id != 0)
- g_source_remove (xwin->ov_refresh_id);
- g_mutex_unlock (xwin->main_lock);
-
- /* get away from X and free mem */
- XDestroyWindow (xwin->display, xwin->child);
- XCloseDisplay (xwin->display);
- g_free (xwin->clips);
-}
-
-static gpointer
-gst_xwin_thread (gpointer data)
-{
- GstXWindowListener *xwin = GST_X_WINDOW_LISTENER (data);
- XEvent event;
-
- /* Hi, I'm GStreamer. What's your name? */
- gst_xwin_init_window (xwin);
-
- while (xwin->cycle) {
- XNextEvent (xwin->display, &event);
-
- if (!xwin->cycle)
- break;
-
- if ((event.type == ConfigureNotify &&
- event.xconfigure.window == xwin->xwindow_id) ||
- (event.type == MapNotify &&
- event.xmap.window == xwin->xwindow_id) ||
- (event.type == UnmapNotify &&
- event.xunmap.window == xwin->xwindow_id)) {
- /* the 'parent' window, i.e. the widget provided by client */
- switch (event.type) {
- case MapNotify:
- xwin->ov_map = TRUE;
- xwin->ov_conf = TRUE;
- gst_xwin_configure (xwin);
- break;
-
- case UnmapNotify:
- xwin->ov_map = FALSE;
- xwin->ov_conf = TRUE;
- gst_xwin_configure (xwin);
- break;
-
- case ConfigureNotify:
- gst_xwin_resize (xwin);
- break;
-
- default:
- /* nothing */
- break;
- }
- } else if (event.xany.window == xwin->child) {
- /* our own private window */
- switch (event.type) {
- case Expose:
- if (!event.xexpose.count) {
- if (xwin->ov_refresh) {
- xwin->ov_refresh = FALSE;
- } else {
- xwin->ov_conf = TRUE;
- gst_xwin_configure (xwin);
- }
- }
- break;
-
- case VisibilityNotify:
- xwin->ov_visibility = event.xvisibility.state;
- if (xwin->ov_refresh) {
- if (event.xvisibility.state != VisibilityFullyObscured)
- xwin->ov_refresh = FALSE;
- } else {
- xwin->ov_conf = TRUE;
- gst_xwin_configure (xwin);
- }
- break;
-
- default:
- /* nothing */
- break;
- }
- } else {
- /* root window */
- switch (event.type) {
- case MapNotify:
- case UnmapNotify:
- /* are we still visible? */
- if (!xwin->ov_refresh) {
- XWindowAttributes attr;
- gboolean on;
-
- XGetWindowAttributes (xwin->display, xwin->xwindow_id, &attr);
- on = (attr.map_state == IsViewable);
- xwin->ov_wmmap = on;
- xwin->ov_conf = TRUE;
- gst_xwin_configure (xwin);
- }
- break;
-
- case ConfigureNotify:
- if (!xwin->ov_refresh) {
- gst_xwin_resize (xwin);
- }
- break;
-
- default:
- /* nothing */
- break;
- }
- }
- }
-
- /* Nice to have met you, see you later */
- gst_xwin_exit_window (xwin);
-
- g_thread_exit (NULL);
-
- return NULL;
-}
-
-static void
-gst_xwin_start (GstXWindowListener * xwin)
-{
- DEBUG ("Starting XWindow listener");
-
- xwin->cycle = TRUE;
- /* we use this main_display for two things: first of all,
- * the window needs to be 'refreshed' to remove artifacts
- * after every move. Secondly, we use this to 'unhang' the
- * event handler after we've stopped it */
- xwin->main_lock = g_mutex_new ();
- xwin->main_display = XOpenDisplay (xwin->display_name);
- xwin->thread = g_thread_create (gst_xwin_thread, (gpointer) xwin, TRUE, NULL);
-
- DEBUG ("Started X-overlay");
-}
-
-static void
-gst_xwin_stop (GstXWindowListener * xwin)
-{
- DEBUG ("Stopping XWindow listener");
-
- xwin->cycle = FALSE;
- /* now, the event loop will hang. To prevent this from hanging
- * our app, app, we re-do our refresh hack. Oh man, this is
- * ugly. But it works. :). */
- g_mutex_lock (xwin->main_lock);
- if (xwin->ov_refresh_id)
- g_source_remove (xwin->ov_refresh_id);
- g_mutex_unlock (xwin->main_lock);
-
- gst_xwin_refresh ((gpointer) xwin);
- g_thread_join (xwin->thread);
- XCloseDisplay (xwin->main_display);
- g_mutex_free (xwin->main_lock);
-
- DEBUG ("Stopped X-overlay");
-}
-
-/*
- * End of code inspired by XawTV.
- */
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
- return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
- GST_VERSION_MINOR,
- "xwindowlistener",
- "X11-based XWindow event/motion listener",
- plugin_init, VERSION, GST_LICENSE, GST_PACKAGE, GST_ORIGIN)
projects / platform / upstream / gstreamer.git / commitdiff