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/*
* GStreamer
* Copyright (C) 2014 Matthew Waters <matthew@centricular.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.
*/
#include <gtk/gtk.h>
#include <gst/gst.h>
static void
button_state_null_cb (GtkWidget * widget, GstElement * pipeline)
{
gst_element_set_state (pipeline, GST_STATE_NULL);
g_print ("GST_STATE_NULL\n");
}
static void
button_state_ready_cb (GtkWidget * widget, GstElement * pipeline)
{
gst_element_set_state (pipeline, GST_STATE_READY);
g_print ("GST_STATE_READY\n");
}
static void
button_state_paused_cb (GtkWidget * widget, GstElement * pipeline)
{
gst_element_set_state (pipeline, GST_STATE_PAUSED);
g_print ("GST_STATE_PAUSED\n");
}
static void
button_state_playing_cb (GtkWidget * widget, GstElement * pipeline)
{
gst_element_set_state (pipeline, GST_STATE_PLAYING);
g_print ("GST_STATE_PLAYING\n");
}
static void
end_stream_cb (GstBus * bus, GstMessage * message, GstElement * pipeline)
{
g_print ("End of stream\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
gtk_main_quit ();
}
static void
destroy_cb (GtkWidget * widget, GdkEvent * event, GstElement * pipeline)
{
g_print ("Close\n");
gst_element_set_state (pipeline, GST_STATE_NULL);
gst_object_unref (pipeline);
gtk_main_quit ();
}
int
main (int argc, char *argv[])
{
GtkWidget *window, *window_control;
GtkWidget *button_state_null, *button_state_ready;
GtkWidget *button_state_paused, *button_state_playing;
GtkWidget *grid, *area;
GstElement *pipeline;
GstElement *videosrc, *videosink;
GstStateChangeReturn ret;
GstCaps *caps;
GstBus *bus;
gst_init (&argc, &argv);
gtk_init (&argc, &argv);
pipeline = gst_pipeline_new ("pipeline");
//window that contains an area where the video is drawn
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size (GTK_WINDOW (window), 640, 480);
gtk_window_move (GTK_WINDOW (window), 300, 10);
gtk_window_set_title (GTK_WINDOW (window), "gtkgstwidget");
//window to control the states
window_control = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_resizable (GTK_WINDOW (window_control), FALSE);
gtk_window_move (GTK_WINDOW (window_control), 10, 10);
grid = gtk_grid_new ();
gtk_container_add (GTK_CONTAINER (window_control), grid);
//control state null
button_state_null = gtk_button_new_with_label ("GST_STATE_NULL");
g_signal_connect (G_OBJECT (button_state_null), "clicked",
G_CALLBACK (button_state_null_cb), pipeline);
gtk_grid_attach (GTK_GRID (grid), button_state_null, 0, 1, 1, 1);
gtk_widget_show (button_state_null);
//control state ready
button_state_ready = gtk_button_new_with_label ("GST_STATE_READY");
g_signal_connect (G_OBJECT (button_state_ready), "clicked",
G_CALLBACK (button_state_ready_cb), pipeline);
gtk_grid_attach (GTK_GRID (grid), button_state_ready, 0, 2, 1, 1);
gtk_widget_show (button_state_ready);
//control state paused
button_state_paused = gtk_button_new_with_label ("GST_STATE_PAUSED");
g_signal_connect (G_OBJECT (button_state_paused), "clicked",
G_CALLBACK (button_state_paused_cb), pipeline);
gtk_grid_attach (GTK_GRID (grid), button_state_paused, 0, 3, 1, 1);
gtk_widget_show (button_state_paused);
//control state playing
button_state_playing = gtk_button_new_with_label ("GST_STATE_PLAYING");
g_signal_connect (G_OBJECT (button_state_playing), "clicked",
G_CALLBACK (button_state_playing_cb), pipeline);
gtk_grid_attach (GTK_GRID (grid), button_state_playing, 0, 4, 1, 1);
gtk_widget_show (button_state_playing);
gtk_widget_show (grid);
gtk_widget_show (window_control);
g_signal_connect (G_OBJECT (window), "delete-event", G_CALLBACK (destroy_cb),
pipeline);
//configure the pipeline
videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc");
videosink = gst_element_factory_make ("gtksink", "gtksink");
g_object_get (videosink, "widget", &area, NULL);
gtk_container_add (GTK_CONTAINER (window), area);
g_object_unref (area);
gtk_widget_realize (area);
caps = gst_caps_new_simple ("video/x-raw",
"width", G_TYPE_INT, 640,
"height", G_TYPE_INT, 480, "format", G_TYPE_STRING, "BGRA", NULL);
gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL);
if (!gst_element_link_filtered (videosrc, videosink, caps)) {
gst_caps_unref (caps);
g_warning ("Failed to link videosrc to glfiltercube!\n");
return -1;
}
gst_caps_unref (caps);
//set window id on this event
bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline));
g_signal_connect (bus, "message::error", G_CALLBACK (end_stream_cb),
pipeline);
g_signal_connect (bus, "message::warning", G_CALLBACK (end_stream_cb),
pipeline);
g_signal_connect (bus, "message::eos", G_CALLBACK (end_stream_cb), pipeline);
gst_object_unref (bus);
//start
ret = gst_element_set_state (pipeline, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
g_print ("Failed to start up pipeline!\n");
return -1;
}
gtk_widget_show_all (window);
gtk_main ();
gst_deinit ();
return 0;
}
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