1 /* GStreamer
2 * Copyright (C) <2010> Stefan Kost <ensonic@users.sf.net>
3 *
4 * gtk-videooverlay: demonstrate overlay handling using gtk
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #ifdef HAVE_CONFIG_H
23 #include "config.h"
24 #endif
25
26 #define GDK_VERSION_MIN_REQUIRED (GDK_VERSION_3_0)
27
28 #include <glib.h>
29 #include <gdk/gdkx.h>
30 #include <gtk/gtk.h>
31
32 #include <gst/gst.h>
33 #include <gst/video/videooverlay.h>
34
35 #include <string.h>
36
37 static void
window_closed(GtkWidget * widget,GdkEvent * event,gpointer user_data)38 window_closed (GtkWidget * widget, GdkEvent * event, gpointer user_data)
39 {
40 GstElement *pipeline = user_data;
41
42 gtk_widget_hide (widget);
43 gst_element_set_state (pipeline, GST_STATE_NULL);
44 gtk_main_quit ();
45 }
46
47 /* slightly convoluted way to find a working video sink that's not a bin,
48 * one could use autovideosink from gst-plugins-good instead
49 */
50 static GstElement *
find_video_sink(void)51 find_video_sink (void)
52 {
53 GstStateChangeReturn sret;
54 GstElement *sink;
55
56 if ((sink = gst_element_factory_make ("xvimagesink", NULL))) {
57 sret = gst_element_set_state (sink, GST_STATE_READY);
58 if (sret == GST_STATE_CHANGE_SUCCESS)
59 return sink;
60
61 gst_element_set_state (sink, GST_STATE_NULL);
62 gst_object_unref (sink);
63 }
64
65 if ((sink = gst_element_factory_make ("ximagesink", NULL))) {
66 sret = gst_element_set_state (sink, GST_STATE_READY);
67 if (sret == GST_STATE_CHANGE_SUCCESS)
68 return sink;
69
70 gst_element_set_state (sink, GST_STATE_NULL);
71 gst_object_unref (sink);
72 }
73
74 if (strcmp (DEFAULT_VIDEOSINK, "xvimagesink") == 0 ||
75 strcmp (DEFAULT_VIDEOSINK, "ximagesink") == 0)
76 return NULL;
77
78 if ((sink = gst_element_factory_make (DEFAULT_VIDEOSINK, NULL))) {
79 if (GST_IS_BIN (sink)) {
80 gst_object_unref (sink);
81 return NULL;
82 }
83
84 sret = gst_element_set_state (sink, GST_STATE_READY);
85 if (sret == GST_STATE_CHANGE_SUCCESS)
86 return sink;
87
88 gst_element_set_state (sink, GST_STATE_NULL);
89 gst_object_unref (sink);
90 }
91
92 return NULL;
93 }
94
95 int
main(int argc,char ** argv)96 main (int argc, char **argv)
97 {
98 GdkWindow *video_window_xwindow;
99 GtkWidget *window, *video_window;
100 GstElement *pipeline, *src, *sink;
101 gulong embed_xid;
102 GstStateChangeReturn sret;
103
104 gst_init (&argc, &argv);
105 gtk_init (&argc, &argv);
106
107 /* prepare the pipeline */
108
109 pipeline = gst_pipeline_new ("xvoverlay");
110 src = gst_element_factory_make ("videotestsrc", NULL);
111 sink = find_video_sink ();
112
113 if (sink == NULL)
114 g_error ("Couldn't find a working video sink.");
115
116 gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
117 gst_element_link (src, sink);
118
119 /* prepare the ui */
120
121 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
122 g_signal_connect (G_OBJECT (window), "delete-event",
123 G_CALLBACK (window_closed), (gpointer) pipeline);
124 gtk_window_set_default_size (GTK_WINDOW (window), 320, 240);
125 gtk_window_set_title (GTK_WINDOW (window), "GstVideoOverlay Gtk+ demo");
126
127 video_window = gtk_drawing_area_new ();
128 gtk_container_add (GTK_CONTAINER (window), video_window);
129 gtk_container_set_border_width (GTK_CONTAINER (window), 16);
130
131 gtk_widget_show_all (window);
132
133 video_window_xwindow = gtk_widget_get_window (video_window);
134 embed_xid = GDK_WINDOW_XID (video_window_xwindow);
135 gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (sink), embed_xid);
136
137 /* run the pipeline */
138
139 sret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
140 if (sret == GST_STATE_CHANGE_FAILURE)
141 gst_element_set_state (pipeline, GST_STATE_NULL);
142 else
143 gtk_main ();
144
145 gst_object_unref (pipeline);
146 return 0;
147 }
148