/* * GStreamer * Copyright (C) 2008-2009 Julien Isorce * * 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 #include #include #include "../gstgtk.h" static GstBusSyncReply create_window (GstBus* bus, GstMessage* message, GtkWidget* widget) { // ignore anything but 'prepare-window-handle' element messages if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT) return GST_BUS_PASS; if (!gst_is_video_overlay_prepare_window_handle_message (message)) return GST_BUS_PASS; g_print ("setting window handle\n"); //do not call gdk_window_ensure_native for the first time here because //we are in a different thread than the main thread //(and the main thread the onne) gst_video_overlay_set_gtk_window (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), widget); gst_message_unref (message); return GST_BUS_DROP; } 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 gboolean draw_cb(GtkWidget* widget, cairo_t *cr, GstElement* videosink) { g_print ("draw_cb\n"); gst_video_overlay_expose (GST_VIDEO_OVERLAY (videosink)); return FALSE; } 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(); } 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 gchar* slider_fps_cb (GtkScale* scale, gdouble value, GstElement* pipeline) { //change the video frame rate dynamically return g_strdup_printf ("video framerate: %0.*g", gtk_scale_get_digits (scale), value); } gint main (gint argc, gchar *argv[]) { GtkWidget *area; gst_init (&argc, &argv); gtk_init (&argc, &argv); GstElement* pipeline = gst_pipeline_new ("pipeline"); GstElement* videosrc = gst_element_factory_make ("videotestsrc", "videotestsrc"); GstElement* videosink = gst_element_factory_make ("glimagesink", "glimagesink"); gst_bin_add_many (GST_BIN (pipeline), videosrc, videosink, NULL); gboolean link_ok = gst_element_link_many(videosrc, videosink, NULL) ; if(!link_ok) { g_warning("Failed to link an element!\n") ; return -1; } //set window id on this event GstBus* bus = gst_pipeline_get_bus (GST_PIPELINE (pipeline)); gst_bus_add_signal_watch (bus); 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_element_set_state(pipeline, GST_STATE_READY); area = gtk_drawing_area_new(); gst_bus_set_sync_handler (bus, (GstBusSyncHandler) create_window, area, NULL); gst_object_unref (bus); //window that contains an area where the video is drawn GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL); gtk_widget_set_size_request (window, 640, 480); gtk_window_move (GTK_WINDOW (window), 300, 10); gtk_window_set_title (GTK_WINDOW (window), "glimagesink implement the gstvideooverlay interface"); GdkGeometry geometry; geometry.min_width = 1; geometry.min_height = 1; geometry.max_width = -1; geometry.max_height = -1; gtk_window_set_geometry_hints (GTK_WINDOW (window), window, &geometry, GDK_HINT_MIN_SIZE); //window to control the states GtkWidget* window_control = gtk_window_new (GTK_WINDOW_TOPLEVEL); geometry.min_width = 1; geometry.min_height = 1; geometry.max_width = -1; geometry.max_height = -1; gtk_window_set_geometry_hints (GTK_WINDOW (window_control), window_control, &geometry, GDK_HINT_MIN_SIZE); gtk_window_set_resizable (GTK_WINDOW (window_control), FALSE); gtk_window_move (GTK_WINDOW (window_control), 10, 10); GtkWidget* table = gtk_grid_new (); gtk_container_add (GTK_CONTAINER (window_control), table); //control state null GtkWidget* 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 (table), button_state_null, 0, 0, 1, 1); gtk_widget_show (button_state_null); //control state ready GtkWidget* 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 (table), button_state_ready, 0, 1, 1, 1); gtk_widget_show (button_state_ready); //control state paused GtkWidget* 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 (table), button_state_paused, 0, 2, 1, 1); gtk_widget_show (button_state_paused); //control state playing GtkWidget* 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 (table), button_state_playing, 0, 3, 1, 1); gtk_widget_show (button_state_playing); //change framerate GtkWidget* slider_fps = gtk_scale_new_with_range (GTK_ORIENTATION_VERTICAL, 1, 30, 2); g_signal_connect (G_OBJECT (slider_fps), "format-value", G_CALLBACK (slider_fps_cb), pipeline); gtk_grid_attach (GTK_GRID (table), slider_fps, 1, 0, 1, 4); gtk_widget_show (slider_fps); gtk_widget_show (table); gtk_widget_show (window_control); //configure the pipeline g_signal_connect(G_OBJECT(window), "delete-event", G_CALLBACK(destroy_cb), pipeline); //area where the video is drawn gtk_container_add (GTK_CONTAINER (window), area); gtk_widget_realize(area); //needed when being in GST_STATE_READY, GST_STATE_PAUSED //or resizing/obscuring the window g_signal_connect(area, "draw", G_CALLBACK(draw_cb), videosink); gtk_widget_show_all (window); gst_element_set_state(pipeline, GST_STATE_PLAYING); gtk_main(); return 0; }