1 /*
2 * GStreamer
3 * Copyright (C) 2014 Matthew Waters <matthew@centricular.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 #include <gtk/gtk.h>
22 #include <gst/gst.h>
23
24 #include <gst/gl/gl.h>
25
26 #if GST_GL_HAVE_WINDOW_X11 && defined (GDK_WINDOWING_X11)
27 #include <gst/gl/x11/gstgldisplay_x11.h>
28 #endif
29
30 static void
button_state_null_cb(GtkWidget * widget,GstElement * pipeline)31 button_state_null_cb (GtkWidget * widget, GstElement * pipeline)
32 {
33 gst_element_set_state (pipeline, GST_STATE_NULL);
34 g_print ("GST_STATE_NULL\n");
35 }
36
37 static void
button_state_ready_cb(GtkWidget * widget,GstElement * pipeline)38 button_state_ready_cb (GtkWidget * widget, GstElement * pipeline)
39 {
40 gst_element_set_state (pipeline, GST_STATE_READY);
41 g_print ("GST_STATE_READY\n");
42 }
43
44 static void
button_state_paused_cb(GtkWidget * widget,GstElement * pipeline)45 button_state_paused_cb (GtkWidget * widget, GstElement * pipeline)
46 {
47 gst_element_set_state (pipeline, GST_STATE_PAUSED);
48 g_print ("GST_STATE_PAUSED\n");
49 }
50
51 static void
button_state_playing_cb(GtkWidget * widget,GstElement * pipeline)52 button_state_playing_cb (GtkWidget * widget, GstElement * pipeline)
53 {
54 gst_element_set_state (pipeline, GST_STATE_PLAYING);
55 g_print ("GST_STATE_PLAYING\n");
56 }
57
58 static void
end_stream_cb(GstBus * bus,GstMessage * message,GstElement * pipeline)59 end_stream_cb (GstBus * bus, GstMessage * message, GstElement * pipeline)
60 {
61 g_print ("End of stream\n");
62
63 gst_element_set_state (pipeline, GST_STATE_NULL);
64 gst_object_unref (pipeline);
65
66 gtk_main_quit ();
67 }
68
69 static void
destroy_cb(GtkWidget * widget,GdkEvent * event,GstElement * pipeline)70 destroy_cb (GtkWidget * widget, GdkEvent * event, GstElement * pipeline)
71 {
72 g_print ("Close\n");
73
74 gst_element_set_state (pipeline, GST_STATE_NULL);
75 gst_object_unref (pipeline);
76
77 gtk_main_quit ();
78 }
79
80 int
main(int argc,char * argv[])81 main (int argc, char *argv[])
82 {
83 GtkWidget *window, *window_control;
84 GtkWidget *button_state_null, *button_state_ready;
85 GtkWidget *button_state_paused, *button_state_playing;
86 GtkWidget *grid, *area;
87 GstElement *pipeline;
88 GstElement *videosrc, *upload, *effect, *videosink;
89 GstStateChangeReturn ret;
90 GstCaps *caps;
91 GstBus *bus;
92
93 #if GST_GL_HAVE_WINDOW_X11 && defined(GDK_WINDOWING_X11)
94 XInitThreads ();
95 #endif
96
97 gst_init (&argc, &argv);
98 gtk_init (&argc, &argv);
99
100 pipeline = gst_pipeline_new ("pipeline");
101
102 //window that contains an area where the video is drawn
103 window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
104 gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
105 gtk_window_move (GTK_WINDOW (window), 300, 10);
106 gtk_window_set_title (GTK_WINDOW (window), "gtkgstwidget");
107
108 //window to control the states
109 window_control = gtk_window_new (GTK_WINDOW_TOPLEVEL);
110 gtk_window_set_resizable (GTK_WINDOW (window_control), FALSE);
111 gtk_window_move (GTK_WINDOW (window_control), 10, 10);
112 grid = gtk_grid_new ();
113 gtk_container_add (GTK_CONTAINER (window_control), grid);
114
115 //control state null
116 button_state_null = gtk_button_new_with_label ("GST_STATE_NULL");
117 g_signal_connect (G_OBJECT (button_state_null), "clicked",
118 G_CALLBACK (button_state_null_cb), pipeline);
119 gtk_grid_attach (GTK_GRID (grid), button_state_null, 0, 1, 1, 1);
120 gtk_widget_show (button_state_null);
121
122 //control state ready
123 button_state_ready = gtk_button_new_with_label ("GST_STATE_READY");
124 g_signal_connect (G_OBJECT (button_state_ready), "clicked",
125 G_CALLBACK (button_state_ready_cb), pipeline);
126 gtk_grid_attach (GTK_GRID (grid), button_state_ready, 0, 2, 1, 1);
127 gtk_widget_show (button_state_ready);
128
129 //control state paused
130 button_state_paused = gtk_button_new_with_label ("GST_STATE_PAUSED");
131 g_signal_connect (G_OBJECT (button_state_paused), "clicked",
132 G_CALLBACK (button_state_paused_cb), pipeline);
133 gtk_grid_attach (GTK_GRID (grid), button_state_paused, 0, 3, 1, 1);
134 gtk_widget_show (button_state_paused);
135
136 //control state playing
137 button_state_playing = gtk_button_new_with_label ("GST_STATE_PLAYING");
138 g_signal_connect (G_OBJECT (button_state_playing), "clicked",
139 G_CALLBACK (button_state_playing_cb), pipeline);
140 gtk_grid_attach (GTK_GRID (grid), button_state_playing, 0, 4, 1, 1);
141 gtk_widget_show (button_state_playing);
142
143 gtk_widget_show (grid);
144 gtk_widget_show (window_control);
145
146 g_signal_connect (G_OBJECT (window), "delete-event", G_CALLBACK (destroy_cb),
147 pipeline);
148
149 //configure the pipeline
150 videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc");
151 upload = gst_element_factory_make ("glupload", "glupload");
152 effect = gst_element_factory_make ("glfiltercube", "glfiltercube");
153 videosink = gst_element_factory_make ("gtkglsink", "gtksink");
154
155 g_object_get (videosink, "widget", &area, NULL);
156 gtk_container_add (GTK_CONTAINER (window), area);
157 g_object_unref (area);
158
159 caps = gst_caps_new_simple ("video/x-raw", "width", G_TYPE_INT, 640,
160 "height", G_TYPE_INT, 480, "format", G_TYPE_STRING, "RGBA",
161 "framerate", GST_TYPE_FRACTION, 30, 1, NULL);
162
163 gst_bin_add_many (GST_BIN (pipeline), videosrc, upload, effect, videosink,
164 NULL);
165
166 if (!gst_element_link_filtered (videosrc, upload, caps)) {
167 gst_caps_unref (caps);
168 g_warning ("Failed to link videosrc to glfiltercube!\n");
169 return -1;
170 }
171 gst_caps_unref (caps);
172
173 if (!gst_element_link_many (upload, effect, videosink, NULL)) {
174 g_warning ("Failed to link videosrc to glfiltercube!\n");
175 return -1;
176 }
177 //set window id on this event
178 bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
179 g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb),
180 pipeline);
181 g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb),
182 pipeline);
183 g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), pipeline);
184 gst_object_unref (bus);
185
186 //start
187 ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
188 if (ret == GST_STATE_CHANGE_FAILURE) {
189 g_print ("Failed to start up pipeline!\n");
190 return -1;
191 }
192
193 gtk_widget_show_all (window);
194
195 gtk_main ();
196
197 gst_deinit ();
198
199 return 0;
200 }
201