Open a window and play a song

I start ocarina with a file.  I play the song right away, and open a
window so that gtk_main() can quit when closed.

gui/ocarina.cpp

@@ -2,11 +2,25 @@
 #include <iostream>
 using namespace std;
 
+#include <ocarina/window.h>
 #include <libsaria/libsaria.h>
 
-int main()
+void ocarina_init(int argc, char **argv)
+{
+	gtk_init(&argc, &argv);
+	window_init();
+	gtk_main();
+}
+
+void ocarina_quit()
+{
+	gtk_main_quit();
+}
+
+int main(int argc, char **argv)
 {
 	print("Ocarina 5.0");
-	libsaria_init();
+	libsaria_init(argc, argv);
+	ocarina_init(argc, argv);
 	return 0;
 }

gui/window.cpp

@@ -0,0 +1,23 @@
+
+#include <ocarina/ocarina.h>
+#include <ocarina/window.h>
+
+static GtkWidget *window;
+
+void destroy_window(GtkWidget *widget, GdkEvent *event, gpointer data)
+{
+	ocarina_quit();
+}
+
+void window_resize(int w, int h)
+{
+	gtk_window_resize(GTK_WINDOW(window), w, h);
+}
+
+void window_init()
+{
+	window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
+	g_signal_connect(window, "destroy", G_CALLBACK(destroy_window), NULL);
+	window_resize(800, 600);
+	gtk_widget_show(window);
+}

include/libsaria/audio.h

@@ -0,0 +1,10 @@
+#ifndef LIBSARIA_AUDIO_H
+#define LIBSARIA_AUDIO_H
+
+extern "C" {
+	#include <gst/gst.h>
+}
+
+void audio_init(int, char **);
+
+#endif /* LIBSARIA_AUDIO_H */

include/libsaria/libsaria.h

@@ -3,6 +3,6 @@
 
 #include <libsaria/print.h>
 
-void libsaria_init();
+void libsaria_init(int, char**);
 
 #endif /* LIBSARIA_H */

include/libsaria/print.h

@@ -1,6 +1,9 @@
 #ifndef LIBSARIA_PRINT
 #define LIBSARIA_PRINT
 
+#include <string>
+using namespace std;
+
 void print(string item);
 
 #endif /* LIBSARIA_PRINT */

libsaria/audio/init.cpp

@@ -0,0 +1,40 @@
+
+#include <libsaria/audio.h>
+#include <libsaria/libsaria.h>
+
+static GstElement *player;
+static string cur_file;
+
+void change_state(GstState new_state)
+{
+	gst_element_set_state(GST_ELEMENT(player), new_state);
+}
+
+void reset()
+{
+	cur_file = "";
+	change_state(GST_STATE_NULL);
+}
+
+void load_file(string file)
+{
+	string uri = "file://" + file;
+	cur_file = file;
+	g_object_set(G_OBJECT(player), "uri", uri.c_str(), NULL);
+}
+
+void play()
+{
+	change_state(GST_STATE_PLAYING);
+}
+
+void audio_init(int argc, char **argv)
+{
+	print("Initializing audio...");
+	gst_init(&argc, &argv);
+
+	player = gst_element_factory_make("playbin2", "player");
+	if (argc > 1)
+		load_file(argv[1]);
+	play();
+}

libsaria/init.cpp

@@ -2,9 +2,11 @@
 #include <iostream>
 using namespace std;
 
+#include <libsaria/audio.h>
 #include <libsaria/libsaria.h>
 
-void libsaria_init()
+void libsaria_init(int argc, char **argv)
 {
 	print("Initializing libsaria");
+	audio_init(argc, argv);
 }