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

#include <gtkmm.h>

#include <gstreamermm.h>

#include <iostream>

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

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

#define UI_FILE "src/guitar_tuner.ui"

class Sound

{

	public:

		Sound();

		void start_playing(double frequency);

		bool stop_playing();

	private:

		Glib::RefPtr<Gst::Pipeline> m_pipeline;

		Glib::RefPtr<Gst::Element> m_source;

		Glib::RefPtr<Gst::Element> m_sink;

};

Sound::Sound()

{

	m_pipeline = Gst::Pipeline::create("note");

	m_source = Gst::ElementFactory::create_element("audiotestsrc",

	                                               "source");

	m_sink = Gst::ElementFactory::create_element("autoaudiosink",

	                                             "output");

	m_pipeline->add(m_source);

	m_pipeline->add(m_sink);

	m_source->link(m_sink);

}

void Sound::start_playing (double frequency)

{

	m_source->set_property("freq", frequency);

	m_pipeline->set_state(Gst::STATE_PLAYING);

	/* stop it after 200ms */

	Glib::signal_timeout().connect(sigc::mem_fun(*this, &Sound::stop_playing),

	                               200);

}

bool Sound::stop_playing()

{

	m_pipeline->set_state(Gst::STATE_NULL);

	return false;

}

static void

on_button_clicked(double frequency, Sound* sound)

{

	sound->start_playing (frequency);

}

int

main(int argc, char *argv[])

{

	Gtk::Main kit(argc, argv);

	Gst::init (argc, argv);

	// Load the Glade file and instantiate its widgets:

	Glib::RefPtr<Gtk::Builder> builder;

	try

	{

		builder = Gtk::Builder::create_from_file(UI_FILE);

	}

	catch (const Glib::FileError & ex)

	{

		std::cerr << ex.what() << std::endl;

		return 1;

	}

	Gtk::Window* main_win = 0;

	builder->get_widget("main_window", main_win);

	Sound sound;

	Gtk::Button* button = 0;

	builder->get_widget("button_E", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              329.63, &sound));

	builder->get_widget("button_A", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              440, &sound));

	builder->get_widget("button_D", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              587.33, &sound));

	builder->get_widget("button_G", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              783.99, &sound));

	builder->get_widget("button_B", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              987.77, &sound));

	builder->get_widget("button_e", button);

	button->signal_clicked().connect (sigc::bind<double, Sound*>(sigc::ptr_fun(&on_button_clicked),

	                                              1318.5, &sound));

	kit.run(*main_win);

	return 0;

}