gtk-app.c

   1 /*
   2 Largely based on an example by Tristan Matthews
   3 http://tristanswork.blogspot.com/2008/09/fullscreen-video-in-gstreamer-with-gtk.html
   4
   5 */
   6 #include <gst/gst.h>
   7 #include <gtk/gtk.h>
   8 #include <gst/interfaces/xoverlay.h>
   9 #include <gdk/gdk.h>
  10 #include <gdk/gdkx.h>
  11 #include "app.h"
  12
  13 static void
  14 bus_call(GstBus * bus, GstMessage *msg, gpointer data)
  15 {
  16   GtkWidget *window = (GtkWidget*) data;
  17   if (GST_MESSAGE_TYPE(msg) == GST_MESSAGE_ELEMENT &&
  18       gst_structure_has_name(msg->structure, "prepare-xwindow-id")){
  19     g_print("Got prepare-xwindow-id msg\n");
  20     gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(GST_MESSAGE_SRC(msg)),
  21         GDK_WINDOW_XWINDOW(window->window));
  22   }
  23 }
  24
  25 static void
  26 toggle_fullscreen(GtkWidget *widget){
  27   GdkWindowState state = gdk_window_get_state(GDK_WINDOW(widget->window));
  28   if (state == GDK_WINDOW_STATE_FULLSCREEN){
  29     gtk_window_unfullscreen(GTK_WINDOW(widget));
  30   }
  31   else{
  32     gtk_window_fullscreen(GTK_WINDOW(widget));
  33   }
  34 }
  35
  36
  37 static gboolean
  38 key_press_event_cb(GtkWidget *widget, GdkEventKey *event, gpointer data)
  39 {
  40   g_print("got key %c\n", event->keyval);
  41   switch (event->keyval){
  42   case 'f':
  43     toggle_fullscreen(widget);
  44     break;
  45   default:
  46     break;
  47   }
  48   return TRUE;
  49 }
  50
  51 void destroy_cb(GtkWidget * widget, gpointer data)
  52 {
  53   GMainLoop *loop = (GMainLoop*) data;
  54   g_print("Window destroyed\n");
  55   g_main_loop_quit(loop);
  56 }
  57
  58
  59 gint main (gint argc, gchar *argv[])
  60 {
  61   /* initialization */
  62   gst_init (&argc, &argv);
  63   gtk_init (&argc, &argv);
  64
  65   GMainLoop *loop = g_main_loop_new(NULL, FALSE);
  66   GtkWidget *window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  67
  68   GstElement *sink = gst_element_factory_make("ximagesink", "sink");
  69   GstElement *pipeline = (GstElement *)make_pipeline(sink);
  70
  71   gst_bus_add_watch(gst_pipeline_get_bus(GST_PIPELINE(pipeline)),
  72       (GstBusFunc)bus_call, window);
  73
  74   // attach key press signal to key press callback
  75   gtk_widget_set_events(window, GDK_KEY_PRESS_MASK);
  76   g_signal_connect(G_OBJECT(window), "key-press-event", G_CALLBACK(key_press_event_cb), sink);
  77   g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(destroy_cb), loop);
  78
  79
  80   GdkColor black = {0, 0, 0, 0};
  81   gtk_widget_modify_bg(window, GTK_STATE_NORMAL, &black);
  82
  83   gtk_widget_show_all(window);
  84
  85   gst_element_set_state(pipeline, GST_STATE_PLAYING);
  86
  87   g_main_loop_run(loop);
  88
  89
  90   /* clean up */
  91   gst_element_set_state (pipeline, GST_STATE_NULL);
  92   gst_object_unref (pipeline);
  93   return 0;
  94 }
  95