/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */

#include <config.h>

#include <gtk/gtk.h>

#include <gst/gst.h>

#include <glib/gi18n.h>

/* For testing purposes, use the local (not installed) ui file */

/* #define UI_FILE PACKAGE_DATA_DIR"/guitar_tuner/ui/guitar_tuner.ui" */

#define UI_FILE "src/guitar_tuner.ui"

/* Frequencies of the tones */

#define NOTE_E 329.63

#define NOTE_A 440

#define NOTE_D 587.33

#define NOTE_G 783.99

#define NOTE_B 987.77

#define NOTE_e 1318.5

#define LENGTH 500

#define WIDGET_WINDOW "window"

static gboolean

pipeline_stop (GstElement* pipeline)

{

	gst_element_set_state (pipeline, GST_STATE_NULL);

	g_object_unref (pipeline);

	/* disconnect handler */

	return FALSE;

}

static void 

play_sound (gdouble frequency)

{

	GstElement *source, *sink;

	GstElement *pipeline;

	pipeline = gst_pipeline_new ("note");

	source   = gst_element_factory_make ("audiotestsrc",

	                                     "source");

	sink     = gst_element_factory_make ("autoaudiosink",

	                                     "output");

	/* set frequency */

	g_object_set (source, "freq", frequency, NULL);

	gst_bin_add_many (GST_BIN (pipeline), source, sink, NULL);

	gst_element_link (source, sink);

	gst_element_set_state (pipeline, GST_STATE_PLAYING);

	/* stop it after 500ms */

	g_timeout_add (LENGTH, (GSourceFunc) pipeline_stop, pipeline);

}

/* Callback for the buttons */

void on_button_clicked (GtkButton* button,

                        gpointer user_data)

{

	const gchar* text = gtk_button_get_label (button);

	if (g_str_equal (text, _("E")))

	    play_sound (NOTE_E);

	else if (g_str_equal (text, _("A")))

	    play_sound (NOTE_A);

	else if (g_str_equal (text, _("G")))

	    play_sound (NOTE_G);

	else if (g_str_equal (text, _("D")))

	    play_sound (NOTE_D);

	else if (g_str_equal (text, _("B")))

	    play_sound (NOTE_B);

	else if (g_str_equal (text, _("e")))

	    play_sound (NOTE_e);

}

int

main (int argc, char *argv[])

{

 	GtkWidget *window;

	GtkBuilder *builder;

	/* Initialize gtk+ and gstreamer */

	gst_init (&argc, &argv);

	gtk_init (&argc, &argv);

	builder = gtk_builder_new ();

	gtk_builder_add_from_file (builder, UI_FILE, NULL);

	window = GTK_WIDGET (gtk_builder_get_object (builder, WIDGET_WINDOW));

	gtk_builder_connect_signals (builder, NULL);

	gtk_widget_show (window);

	gtk_main ();

	return 0;

}