1 /*
2 * GStreamer
3 * Copyright (C) 2013 Matthew Waters <ystreet00@gmail.com>
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
14 *
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
19 */
20
21 #ifdef HAVE_CONFIG_H
22 #include "config.h"
23 #endif
24
25 #include <gst/gl/x11/gstgldisplay_x11.h>
26 #include <gst/gl/x11/gstglwindow_x11.h>
27 #include "xcb_event_source.h"
28
29 GST_DEBUG_CATEGORY_STATIC (gst_gl_display_debug);
30 #define GST_CAT_DEFAULT gst_gl_display_debug
31
32 G_DEFINE_TYPE (GstGLDisplayX11, gst_gl_display_x11, GST_TYPE_GL_DISPLAY);
33
34 static void gst_gl_display_x11_finalize (GObject * object);
35 static guintptr gst_gl_display_x11_get_handle (GstGLDisplay * display);
36
37 G_GNUC_INTERNAL
38 gboolean gst_gl_display_x11_handle_event (GstGLDisplayX11 * display_x11);
39
40 extern gboolean gst_gl_window_x11_handle_event (GstGLWindowX11 * window_x11,
41 xcb_generic_event_t * event);
42
43 static void
gst_gl_display_x11_class_init(GstGLDisplayX11Class * klass)44 gst_gl_display_x11_class_init (GstGLDisplayX11Class * klass)
45 {
46 GST_GL_DISPLAY_CLASS (klass)->get_handle =
47 GST_DEBUG_FUNCPTR (gst_gl_display_x11_get_handle);
48
49 G_OBJECT_CLASS (klass)->finalize = gst_gl_display_x11_finalize;
50 }
51
52 static void
gst_gl_display_x11_init(GstGLDisplayX11 * display_x11)53 gst_gl_display_x11_init (GstGLDisplayX11 * display_x11)
54 {
55 GstGLDisplay *display = (GstGLDisplay *) display_x11;
56
57 display->type = GST_GL_DISPLAY_TYPE_X11;
58 display_x11->foreign_display = FALSE;
59 }
60
61 static void
gst_gl_display_x11_finalize(GObject * object)62 gst_gl_display_x11_finalize (GObject * object)
63 {
64 GstGLDisplayX11 *display_x11 = GST_GL_DISPLAY_X11 (object);
65
66 g_free (display_x11->name);
67
68 if (!display_x11->foreign_display && display_x11->display) {
69 XSync (display_x11->display, FALSE);
70 XCloseDisplay (display_x11->display);
71 }
72
73 G_OBJECT_CLASS (gst_gl_display_x11_parent_class)->finalize (object);
74 }
75
76 /**
77 * gst_gl_display_x11_new:
78 * @name: (allow-none): a display name
79 *
80 * Create a new #GstGLDisplayX11 from the x11 display name. See XOpenDisplay()
81 * for details on what is a valid name.
82 *
83 * Returns: (transfer full): a new #GstGLDisplayX11 or %NULL
84 */
85 GstGLDisplayX11 *
gst_gl_display_x11_new(const gchar * name)86 gst_gl_display_x11_new (const gchar * name)
87 {
88 GstGLDisplayX11 *ret;
89
90 GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
91
92 ret = g_object_new (GST_TYPE_GL_DISPLAY_X11, NULL);
93 gst_object_ref_sink (ret);
94 ret->name = g_strdup (name);
95 ret->display = XOpenDisplay (ret->name);
96
97 if (!ret->display) {
98 GST_INFO ("Failed to open X11 display connection with name, \'%s\'", name);
99 gst_object_unref (ret);
100 return NULL;
101 }
102
103 ret->xcb_connection = XGetXCBConnection (ret->display);
104 if (!ret->xcb_connection) {
105 GST_ERROR ("Failed to open retieve XCB connection from X11 Display");
106 gst_object_unref (ret);
107 return NULL;
108 }
109
110 XSetEventQueueOwner (ret->display, XCBOwnsEventQueue);
111
112 GST_GL_DISPLAY (ret)->event_source = xcb_event_source_new (ret);
113 g_source_attach (GST_GL_DISPLAY (ret)->event_source,
114 GST_GL_DISPLAY (ret)->main_context);
115
116 return ret;
117 }
118
119 /**
120 * gst_gl_display_x11_new_with_display:
121 * @display: an existing, x11 display
122 *
123 * Creates a new display connection from a X11 Display.
124 *
125 * Returns: (transfer full): a new #GstGLDisplayX11
126 */
127 GstGLDisplayX11 *
gst_gl_display_x11_new_with_display(Display * display)128 gst_gl_display_x11_new_with_display (Display * display)
129 {
130 GstGLDisplayX11 *ret;
131
132 g_return_val_if_fail (display != NULL, NULL);
133
134 GST_DEBUG_CATEGORY_GET (gst_gl_display_debug, "gldisplay");
135
136 ret = g_object_new (GST_TYPE_GL_DISPLAY_X11, NULL);
137 gst_object_ref_sink (ret);
138
139 ret->name = g_strdup (DisplayString (display));
140 ret->display = display;
141
142 ret->xcb_connection = XGetXCBConnection (ret->display);
143 if (!ret->xcb_connection) {
144 GST_ERROR ("Failed to open retieve XCB connection from X11 Display");
145 gst_object_unref (ret);
146 return NULL;
147 }
148
149 ret->foreign_display = TRUE;
150
151 return ret;
152 }
153
154 static guintptr
gst_gl_display_x11_get_handle(GstGLDisplay * display)155 gst_gl_display_x11_get_handle (GstGLDisplay * display)
156 {
157 return (guintptr) GST_GL_DISPLAY_X11 (display)->display;
158 }
159
160 static int
_compare_xcb_window(GstGLWindowX11 * window_x11,xcb_window_t * window_id)161 _compare_xcb_window (GstGLWindowX11 * window_x11, xcb_window_t * window_id)
162 {
163 return window_x11->internal_win_id - *window_id;
164 }
165
166 static GstGLWindowX11 *
_find_window_from_xcb_window(GstGLDisplayX11 * display_x11,xcb_window_t window_id)167 _find_window_from_xcb_window (GstGLDisplayX11 * display_x11,
168 xcb_window_t window_id)
169 {
170 GstGLDisplay *display = GST_GL_DISPLAY (display_x11);
171 GstGLWindowX11 *ret = NULL;
172 GList *l;
173
174 if (!window_id)
175 return NULL;
176
177 GST_OBJECT_LOCK (display);
178 l = g_list_find_custom (display->windows, &window_id,
179 (GCompareFunc) _compare_xcb_window);
180 if (l)
181 ret = gst_object_ref (l->data);
182 GST_OBJECT_UNLOCK (display);
183
184 return ret;
185 }
186
187 static GstGLWindowX11 *
_window_from_event(GstGLDisplayX11 * display_x11,xcb_generic_event_t * event)188 _window_from_event (GstGLDisplayX11 * display_x11, xcb_generic_event_t * event)
189 {
190 uint8_t event_code = event->response_type & 0x7f;
191
192 switch (event_code) {
193 /* *INDENT-OFF* */
194 #define WIN_FROM_EVENT(case_val,event_type,window_field) \
195 case case_val:{ \
196 event_type * real_event = (event_type *) event; \
197 return _find_window_from_xcb_window (display_x11, real_event->window_field); \
198 }
199 WIN_FROM_EVENT (XCB_CLIENT_MESSAGE, xcb_client_message_event_t, window)
200 WIN_FROM_EVENT (XCB_CONFIGURE_NOTIFY, xcb_configure_notify_event_t, window)
201 WIN_FROM_EVENT (XCB_EXPOSE, xcb_expose_event_t, window)
202 WIN_FROM_EVENT (XCB_KEY_PRESS, xcb_key_press_event_t, event)
203 WIN_FROM_EVENT (XCB_KEY_RELEASE, xcb_key_release_event_t, event)
204 WIN_FROM_EVENT (XCB_BUTTON_PRESS, xcb_button_press_event_t, event)
205 WIN_FROM_EVENT (XCB_BUTTON_RELEASE, xcb_button_release_event_t, event)
206 WIN_FROM_EVENT (XCB_MOTION_NOTIFY, xcb_motion_notify_event_t, event)
207 #undef WIN_FROM_EVENT
208 /* *INDENT-ON* */
209 default:
210 return NULL;
211 }
212 }
213
214 gboolean
gst_gl_display_x11_handle_event(GstGLDisplayX11 * display_x11)215 gst_gl_display_x11_handle_event (GstGLDisplayX11 * display_x11)
216 {
217 xcb_connection_t *connection = display_x11->xcb_connection;
218 xcb_generic_event_t *event;
219 gboolean ret = TRUE;
220
221 while ((event = xcb_poll_for_event (connection))) {
222 GstGLWindowX11 *window_x11 = _window_from_event (display_x11, event);
223
224 GST_TRACE_OBJECT (display_x11, "got event %p to window %" GST_PTR_FORMAT,
225 event, window_x11);
226
227 if (window_x11) {
228 ret = gst_gl_window_x11_handle_event (window_x11, event);
229 } else {
230 /* unknown window, ignore */
231 ret = TRUE;
232 }
233
234 if (window_x11)
235 gst_object_unref (window_x11);
236 g_free (event);
237 }
238
239 return ret;
240 }
241