gstreamer/gst-libs/gst/gl/x11/gstgldisplay_x11.c
Matthew Waters 0e56bead42 gl/x11: use xcb instead of libX11
- xcb is supposedly thread-safe!

videotestsrc ! glimagesink now doesn't spuriously result in a
'call XInitThreads()' error however if anybody else is using X11,
then XInitThreads() still needs to be called and multiple glimagesink's
still need XInitThreads().

Everything still takes libX11 handles as they are compatible with the xcb
variants.  Unfortunately we cannot move fully over to xcb due to GLX being
entirely based on Xlib.  It's also impossible to transform a xcb_connection
to a Display which means we require X11 handles.
2017-12-09 19:32:24 +00:00

236 lines
6.6 KiB
C

/*
* GStreamer
* Copyright (C) 2013 Matthew Waters <ystreet00@gmail.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gl/x11/gstgldisplay_x11.h>
#include <gst/gl/x11/gstglwindow_x11.h>
#include "xcb_event_source.h"
GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
#define GST_CAT_DEFAULT gst_gl_display_debug
G_DEFINE_TYPE (GstGLDisplayX11, gst_gl_display_x11, GST_TYPE_GL_DISPLAY);
static void gst_gl_display_x11_finalize (GObject * object);
static guintptr gst_gl_display_x11_get_handle (GstGLDisplay * display);
gboolean gst_gl_display_x11_handle_event (GstGLDisplayX11 * display_x11);
extern gboolean gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11,
xcb_generic_event_t * event);
static void
gst_gl_display_x11_class_init (GstGLDisplayX11Class * klass)
{
GST_GL_DISPLAY_CLASS (klass)->get_handle =
GST_DEBUG_FUNCPTR (gst_gl_display_x11_get_handle);
G_OBJECT_CLASS (klass)->finalize = gst_gl_display_x11_finalize;
}
static void
gst_gl_display_x11_init (GstGLDisplayX11 * display_x11)
{
GstGLDisplay *display = (GstGLDisplay *) display_x11;
display->type = GST_GL_DISPLAY_TYPE_X11;
display_x11->foreign_display = FALSE;
}
static void
gst_gl_display_x11_finalize (GObject * object)
{
GstGLDisplayX11 *display_x11 = GST_GL_DISPLAY_X11 (object);
g_free (display_x11->name);
if (!display_x11->foreign_display && display_x11->display) {
XSync (display_x11->display, FALSE);
XCloseDisplay (display_x11->display);
}
G_OBJECT_CLASS (gst_gl_display_x11_parent_class)->finalize (object);
}
/**
* gst_gl_display_x11_new:
* @name: (allow-none): a display name
*
* Create a new #GstGLDisplayX11 from the x11 display name. See XOpenDisplay()
* for details on what is a valid name.
*
* Returns: (transfer full): a new #GstGLDisplayX11 or %NULL
*/
GstGLDisplayX11 *
gst_gl_display_x11_new (const gchar * name)
{
GstGLDisplayX11 *ret;
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
ret = g_object_new (GST_TYPE_GL_DISPLAY_X11, NULL);
ret->name = g_strdup (name);
ret->display = XOpenDisplay (ret->name);
if (!ret->display) {
GST_ERROR ("Failed to open X11 display connection with name, \'%s\'", name);
gst_object_unref (ret);
return NULL;
}
ret->xcb_connection = XGetXCBConnection (ret->display);
if (!ret->xcb_connection) {
GST_ERROR ("Failed to open retieve XCB connection from X11 Display");
gst_object_unref (ret);
return NULL;
}
XSetEventQueueOwner (ret->display, XCBOwnsEventQueue);
GST_GL_DISPLAY (ret)->event_source = xcb_event_source_new (ret);
g_source_attach (GST_GL_DISPLAY (ret)->event_source,
GST_GL_DISPLAY (ret)->main_context);
return ret;
}
/**
* gst_gl_display_x11_new_with_display:
* @display: an existing, x11 display
*
* Creates a new display connection from a X11 Display.
*
* Returns: (transfer full): a new #GstGLDisplayX11
*/
GstGLDisplayX11 *
gst_gl_display_x11_new_with_display (Display * display)
{
GstGLDisplayX11 *ret;
g_return_val_if_fail (display != NULL, NULL);
GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
ret = g_object_new (GST_TYPE_GL_DISPLAY_X11, NULL);
ret->name = g_strdup (DisplayString (display));
ret->display = display;
ret->xcb_connection = XGetXCBConnection (ret->display);
if (!ret->xcb_connection) {
GST_ERROR ("Failed to open retieve XCB connection from X11 Display");
gst_object_unref (ret);
return NULL;
}
ret->foreign_display = TRUE;
return ret;
}
static guintptr
gst_gl_display_x11_get_handle (GstGLDisplay * display)
{
return (guintptr) GST_GL_DISPLAY_X11 (display)->display;
}
static int
_compare_xcb_window (GstGLWindowX11 * window_x11, xcb_window_t * window_id)
{
return window_x11->internal_win_id - *window_id;
}
static GstGLWindowX11 *
_find_window_from_xcb_window (GstGLDisplayX11 * display_x11,
xcb_window_t window_id)
{
GstGLDisplay *display = GST_GL_DISPLAY (display_x11);
GstGLWindowX11 *ret = NULL;
GList *l;
if (!window_id)
return NULL;
GST_OBJECT_LOCK (display);
l = g_list_find_custom (display->windows, &window_id,
(GCompareFunc) _compare_xcb_window);
if (l)
ret = gst_object_ref (l->data);
GST_OBJECT_UNLOCK (display);
return ret;
}
static GstGLWindowX11 *
_window_from_event (GstGLDisplayX11 * display_x11, xcb_generic_event_t * event)
{
uint8_t event_code = event->response_type & 0x7f;
switch (event_code) {
/* *INDENT-OFF* */
#define WIN_FROM_EVENT(case_val,event_type,window_field) \
case case_val:{ \
event_type * real_event = (event_type *) event; \
return _find_window_from_xcb_window (display_x11, real_event->window_field); \
}
WIN_FROM_EVENT (XCB_CLIENT_MESSAGE, xcb_client_message_event_t, window)
WIN_FROM_EVENT (XCB_CONFIGURE_NOTIFY, xcb_configure_notify_event_t, window)
WIN_FROM_EVENT (XCB_EXPOSE, xcb_expose_event_t, window)
WIN_FROM_EVENT (XCB_KEY_PRESS, xcb_key_press_event_t, event)
WIN_FROM_EVENT (XCB_KEY_RELEASE, xcb_key_release_event_t, event)
WIN_FROM_EVENT (XCB_BUTTON_PRESS, xcb_button_press_event_t, event)
WIN_FROM_EVENT (XCB_BUTTON_RELEASE, xcb_button_release_event_t, event)
WIN_FROM_EVENT (XCB_MOTION_NOTIFY, xcb_motion_notify_event_t, event)
#undef WIN_FROM_EVENT
/* *INDENT-ON* */
default:
return NULL;
}
}
gboolean
gst_gl_display_x11_handle_event (GstGLDisplayX11 * display_x11)
{
xcb_connection_t *connection = display_x11->xcb_connection;
xcb_generic_event_t *event;
gboolean ret = TRUE;
while ((event = xcb_poll_for_event (connection))) {
GstGLWindowX11 *window_x11 = _window_from_event (display_x11, event);
GST_TRACE_OBJECT (display_x11, "got event %p to window %" GST_PTR_FORMAT,
event, window_x11);
if (window_x11) {
ret = gst_gl_window_x11_handle_event (window_x11, event);
} else {
/* unknown window, ignore */
ret = TRUE;
}
if (window_x11)
gst_object_unref (window_x11);
g_free (event);
}
return ret;
}