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/* -*- 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 369.23
#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_PAUSED);
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 200ms */
g_timeout_add (LENGTH, (GSourceFunc) pipeline_stop, pipeline);
}
/* Callback for the buttons */
void on_button_clicked (GtkButton* button,
gpointer user_data)
{
GtkWidget* label = gtk_bin_get_child (GTK_BIN (button));
const gchar* text = gtk_label_get_label (GTK_LABEL (label));
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;
}
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