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/* -*- 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;
}
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