/*
* lingot, a musical instrument tuner.
*
* Copyright (C) 2004-2011 Ibán Cereijo Graña, Jairo Chapela Martínez.
*
* This file is part of lingot.
*
* lingot is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* lingot is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with lingot; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdio.h>
#include <math.h>
#include <unistd.h>
#include <signal.h>
#include <string.h>
#include <glade/glade.h>
#include "lingot-defs.h"
#include "lingot-config.h"
#include "lingot-gui-mainframe.h"
#include "lingot-gui-config-dialog.h"
#include "lingot-gauge.h"
#include "lingot-i18n.h"
#include "lingot-msg.h"
#include "lingot-background.xpm"
#include "lingot-logo.xpm"
void lingot_gui_mainframe_redraw(LingotMainFrame*);
void lingot_mainframe_filter_frequency_value(LingotMainFrame*);
void lingot_gui_mainframe_draw_gauge(LingotMainFrame*);
void lingot_gui_mainframe_draw_spectrum_and_labels(LingotMainFrame*);
GdkColor black_color;
GdkColor cents_color;
GdkColor gauge_color;
GdkColor spectrum_background_color;
GdkColor spectrum_color;
GdkColor noise_threshold_color;
GdkColor grid_color;
GdkColor freq_color;
// sizes
int gauge_size_x = 160;
int gauge_size_y = 100;
int spectrum_size_y = 64;
// spectrum area margins
int spectrum_bottom_margin = 16;
int spectrum_top_margin = 12;
int spectrum_x_margin = 15;
PangoFontDescription* spectrum_legend_font_desc;
PangoFontDescription* gauge_cents_font_desc;
gchar* filechooser_config_last_folder = NULL;
void lingot_gui_mainframe_callback_redraw(GtkWidget* w, GdkEventExpose* e,
LingotMainFrame* frame) {
lingot_gui_mainframe_redraw(frame);
}
void lingot_gui_mainframe_callback_destroy(GtkWidget* w, LingotMainFrame* frame) {
g_source_remove(frame->visualization_timer_uid);
g_source_remove(frame->freq_computation_timer_uid);
g_source_remove(frame->gauge_computation_uid);
gtk_main_quit();
}
void lingot_gui_mainframe_callback_about(GtkWidget* w, LingotMainFrame* frame) {
static const gchar* authors[] = { "Ibán Cereijo Graña <ibancg@gmail.com>",
"Jairo Chapela Martínez <jairochapela@gmail.com>", NULL };
static const gchar* artists[] = { "Matthew Blissett (Logo design)", NULL };
gtk_show_about_dialog(
NULL,
"name",
"Lingot",
"version",
VERSION,
"copyright",
"\xC2\xA9 2004-2011 Ibán Cereijo Graña\n\xC2\xA9 2004-2011 Jairo Chapela Martínez",
"comments", _("Accurate and easy to use musical instrument tuner"),
"authors", authors, "artists", artists, "website-label",
"http://lingot.nongnu.org/", "website",
"http://lingot.nongnu.org/", "translator-credits",
_("translator-credits"), "logo-icon-name", "lingot-logo",
NULL);
}
void lingot_gui_mainframe_callback_view_spectrum(GtkWidget* w,
LingotMainFrame* frame) {
gtk_widget_set_visible(frame->spectrum_frame,
gtk_check_menu_item_get_active(
GTK_CHECK_MENU_ITEM(frame->view_spectrum_item)));
}
void lingot_gui_mainframe_callback_config_dialog(GtkWidget* w,
LingotMainFrame* frame) {
lingot_gui_config_dialog_show(frame, NULL);
}
unsigned short int lingot_gui_mainframe_get_closest_note_index(FLT freq,
LingotScale* scale, FLT deviation, FLT* error_cents) {
unsigned short note_index = 0;
unsigned short int index;
FLT offset = 1200.0 * log2(freq / scale->base_frequency) - deviation;
offset = fmod(offset, 1200.0);
if (offset < 0.0) {
offset += 1200.0;
}
index = floor(scale->notes * offset / 1200.0);
FLT pitch_inf;
FLT pitch_sup;
int n = 0;
for (;;) {
n++;
pitch_inf = scale->offset_cents[index];
pitch_sup = ((index + 1) < scale->notes) ? scale->offset_cents[index
+ 1] : 1200.0;
if (offset > pitch_sup) {
index++;
continue;
}
if (offset < pitch_inf) {
index--;
continue;
}
break;
};
if (fabs(offset - pitch_inf) < fabs(offset - pitch_sup)) {
note_index = index;
*error_cents = offset - pitch_inf;
} else {
note_index = index + 1;
*error_cents = offset - pitch_sup;
}
return note_index;
}
/* timeout for gauge and labels visualization */
gboolean lingot_gui_mainframe_callback_tout_visualization(gpointer data) {
unsigned int period;
LingotMainFrame* frame = (LingotMainFrame*) data;
period = 1000 / frame->conf->visualization_rate;
frame->visualization_timer_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_tout_visualization, frame);
lingot_gui_mainframe_draw_gauge(frame);
return 0;
}
/* timeout for spectrum computation and display */
gboolean lingot_gui_mainframe_callback_tout_spectrum_computation_display(
gpointer data) {
unsigned int period;
LingotMainFrame* frame = (LingotMainFrame*) data;
period = 1000 / frame->conf->calculation_rate;
frame->freq_computation_timer_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_tout_spectrum_computation_display,
frame);
lingot_gui_mainframe_draw_spectrum_and_labels(frame);
//lingot_core_compute_fundamental_fequency(frame->core);
return 0;
}
/* timeout for a new gauge position computation */
gboolean lingot_gui_mainframe_callback_gauge_computation(gpointer data) {
unsigned int period;
double error_cents;
LingotMainFrame* frame = (LingotMainFrame*) data;
unsigned short note_index;
period = 1000 / GAUGE_RATE;
frame->gauge_computation_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_gauge_computation, frame);
if (!frame->core->running || isnan(frame->core->freq) || (frame->core->freq
< 10.0)) {
lingot_gauge_compute(frame->gauge, frame->conf->gauge_rest_value);
} else {
note_index = lingot_gui_mainframe_get_closest_note_index(
frame->core->freq, frame->conf->scale,
frame->conf->root_frequency_error, &error_cents);
lingot_gauge_compute(frame->gauge, error_cents);
}
return 0;
}
/* timeout for dispatching the error queue */
gboolean lingot_gui_mainframe_callback_error_dispatcher(gpointer data) {
unsigned int period;
GtkWidget* message_dialog;
LingotMainFrame* frame = (LingotMainFrame*) data;
char* error_message = NULL;
message_type_t message_type;
int more_messages;
do {
more_messages = lingot_msg_get(&error_message, &message_type);
if (more_messages) {
message_dialog
= gtk_message_dialog_new(
GTK_WINDOW((frame->config_dialog
!= NULL) ? frame->config_dialog->win : frame->win),
GTK_DIALOG_DESTROY_WITH_PARENT,
(message_type == ERROR) ? GTK_MESSAGE_ERROR
: ((message_type == WARNING) ? GTK_MESSAGE_WARNING
: GTK_MESSAGE_INFO),
GTK_BUTTONS_CLOSE, error_message);
gtk_window_set_title(GTK_WINDOW(message_dialog), (message_type
== ERROR) ? _("Error")
: ((message_type == WARNING) ? _("Warning") : _("Info")));
gtk_window_set_icon(GTK_WINDOW(message_dialog),
gtk_window_get_icon(GTK_WINDOW(frame->win)));
gtk_dialog_run(GTK_DIALOG(message_dialog));
gtk_widget_destroy(message_dialog);
free(error_message);
}
} while (more_messages);
period = 1000 / ERROR_DISPATCH_RATE;
frame->error_dispatcher_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_error_dispatcher, frame);
return 0;
}
void lingot_gui_mainframe_callback_open_config(gpointer data,
LingotMainFrame* frame) {
GtkWidget * dialog = gtk_file_chooser_dialog_new(
_("Open Configuration File"), GTK_WINDOW(frame->win),
GTK_FILE_CHOOSER_ACTION_OPEN, GTK_STOCK_CANCEL,
GTK_RESPONSE_CANCEL, GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT, NULL);
GtkFileFilter *filefilter;
LingotConfig* config = NULL;
filefilter = gtk_file_filter_new();
gtk_file_filter_set_name(filefilter,
(const gchar *) _("Lingot configuration files"));
gtk_file_filter_add_pattern(filefilter, "*.conf");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filefilter);
gtk_file_chooser_set_show_hidden(GTK_FILE_CHOOSER(dialog), TRUE);
if (filechooser_config_last_folder != NULL) {
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog),
filechooser_config_last_folder);
}
if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) {
char *filename;
filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
if (filechooser_config_last_folder != NULL)
free(filechooser_config_last_folder);
filechooser_config_last_folder = strdup(
gtk_file_chooser_get_current_folder(GTK_FILE_CHOOSER(dialog)));
config = lingot_config_new();
lingot_config_load(config, filename);
g_free(filename);
}
gtk_widget_destroy(dialog);
//g_free(filefilter);
if (config != NULL) {
lingot_gui_config_dialog_show(frame, config);
}
}
void lingot_gui_mainframe_callback_save_config(gpointer data,
LingotMainFrame* frame) {
GtkWidget *dialog = gtk_file_chooser_dialog_new(
_("Save Configuration File"), GTK_WINDOW(frame->win),
GTK_FILE_CHOOSER_ACTION_SAVE, GTK_STOCK_CANCEL,
GTK_RESPONSE_CANCEL, GTK_STOCK_SAVE, GTK_RESPONSE_ACCEPT, NULL);
gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER (dialog),
TRUE);
gtk_file_chooser_set_current_name(GTK_FILE_CHOOSER (dialog),
"untitled.conf");
GtkFileFilter* filefilter = gtk_file_filter_new();
gtk_file_filter_set_name(filefilter,
(const gchar *) _("Lingot configuration files"));
gtk_file_filter_add_pattern(filefilter, "*.conf");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filefilter);
gtk_file_chooser_set_show_hidden(GTK_FILE_CHOOSER(dialog), TRUE);
if (filechooser_config_last_folder != NULL) {
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog),
filechooser_config_last_folder);
}
if (gtk_dialog_run(GTK_DIALOG (dialog)) == GTK_RESPONSE_ACCEPT) {
char *filename;
filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER (dialog));
if (filechooser_config_last_folder != NULL)
free(filechooser_config_last_folder);
filechooser_config_last_folder = strdup(
gtk_file_chooser_get_current_folder(GTK_FILE_CHOOSER(dialog)));
lingot_config_save(frame->conf, filename);
g_free(filename);
}
gtk_widget_destroy(dialog);
}
void lingot_gui_mainframe_color(GdkColor* color, int red, int green, int blue) {
color->red = red;
color->green = green;
color->blue = blue;
}
void lingot_gui_mainframe_create(int argc, char *argv[]) {
LingotMainFrame* frame;
LingotConfig* conf;
GladeXML* _gladeXML = NULL;
if (filechooser_config_last_folder == NULL) {
char buff[1000];
sprintf(buff, "%s/%s", getenv("HOME"), CONFIG_DIR_NAME);
filechooser_config_last_folder = strdup(buff);
}
frame = malloc(sizeof(LingotMainFrame));
frame->config_dialog = NULL;
frame->pix_stick = NULL;
frame->conf = lingot_config_new();
conf = frame->conf;
lingot_config_load(conf, CONFIG_FILE_NAME);
frame->gauge = lingot_gauge_new(conf->gauge_rest_value); // gauge in rest situation
// ----- FREQUENCY FILTER CONFIGURATION ------
// low pass IIR filter.
FLT freq_filter_a[] = { 1.0, -0.5 };
FLT freq_filter_b[] = { 0.5 };
frame->freq_filter = lingot_filter_new(1, 0, freq_filter_a, freq_filter_b);
// ---------------------------------------------------
gtk_init(&argc, &argv);
gtk_set_locale();
# define FILE_NAME "lingot-mainframe.glade"
FILE* fd = fopen("src/glade/" FILE_NAME, "r");
if (fd != NULL) {
fclose(fd);
_gladeXML = glade_xml_new("src/glade/" FILE_NAME, "window1", NULL);
} else {
_gladeXML = glade_xml_new(LINGOT_GLADEDIR FILE_NAME, "window1", NULL);
}
# undef FILE_NAME
frame->win = glade_xml_get_widget(_gladeXML, "window1");
GdkPixbuf* logo = gdk_pixbuf_new_from_xpm_data(lingotlogo);
gtk_icon_theme_add_builtin_icon("lingot-logo", 64, logo);
gtk_window_set_icon(GTK_WINDOW(frame->win), logo);
frame->gauge_area = glade_xml_get_widget(_gladeXML, "gauge_area");
frame->spectrum_area = glade_xml_get_widget(_gladeXML, "spectrum_area");
frame->freq_label = glade_xml_get_widget(_gladeXML, "freq_label");
frame->tone_label = glade_xml_get_widget(_gladeXML, "tone_label");
frame->error_label = glade_xml_get_widget(_gladeXML, "error_label");
frame->spectrum_frame = glade_xml_get_widget(_gladeXML, "spectrum_frame");
frame->spectrum_scroll
= GTK_SCROLLED_WINDOW(glade_xml_get_widget(_gladeXML, "scrolledwindow1"));
frame->view_spectrum_item
= glade_xml_get_widget(_gladeXML, "spectrum_item");
gtk_check_menu_item_set_active(
GTK_CHECK_MENU_ITEM(frame->view_spectrum_item), TRUE);
// show all
gtk_widget_show_all(frame->win);
int x = ((conf->fft_size > 256) ? (conf->fft_size >> 1) : 256) + 2
* spectrum_x_margin;
int y = spectrum_size_y + spectrum_bottom_margin + spectrum_top_margin;
// two pixmaps for double buffer in gauge and spectrum drawing
// (virtual screen)
gdk_pixmap_new(frame->gauge_area->window, gauge_size_x, gauge_size_y, -1);
frame->pix_spectrum
= gdk_pixmap_new(frame->spectrum_area->window, x, y, -1);
// GTK signals
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "preferences_item")), "activate",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_config_dialog), frame);
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "quit_item")), "activate", GTK_SIGNAL_FUNC(
lingot_gui_mainframe_callback_destroy), frame);
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "about_item")), "activate", GTK_SIGNAL_FUNC(
lingot_gui_mainframe_callback_about), frame);
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "spectrum_item")), "activate",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_view_spectrum), frame);
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "open_config_item")), "activate",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_open_config), frame);
gtk_signal_connect(GTK_OBJECT(glade_xml_get_widget(_gladeXML, "save_config_item")), "activate",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_save_config), frame);
gtk_signal_connect(GTK_OBJECT(frame->gauge_area), "expose_event",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_redraw), frame);
gtk_signal_connect(GTK_OBJECT(frame->spectrum_area), "expose_event",
GTK_SIGNAL_FUNC(lingot_gui_mainframe_callback_redraw), frame);
gtk_signal_connect(GTK_OBJECT(frame->win), "destroy", GTK_SIGNAL_FUNC(
lingot_gui_mainframe_callback_destroy), frame);
GtkAccelGroup* accel_group = gtk_accel_group_new();
gtk_widget_add_accelerator(glade_xml_get_widget(_gladeXML,
"preferences_item"), "activate", accel_group, 'p',
GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
gtk_window_add_accel_group(GTK_WINDOW(frame->win), accel_group);
unsigned int period;
period = 1000 / conf->visualization_rate;
frame->visualization_timer_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_tout_visualization, frame);
period = 1000 / conf->calculation_rate;
frame->freq_computation_timer_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_tout_spectrum_computation_display,
frame);
period = 1000 / GAUGE_RATE;
frame->gauge_computation_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_gauge_computation, frame);
period = 1000 / ERROR_DISPATCH_RATE;
frame->error_dispatcher_uid = g_timeout_add(period,
lingot_gui_mainframe_callback_error_dispatcher, frame);
lingot_gui_mainframe_color(&gauge_color, 0xC000, 0x0000, 0x2000);
lingot_gui_mainframe_color(&spectrum_background_color, 0x1111, 0x3333,
0x1111);
lingot_gui_mainframe_color(&spectrum_color, 0x2222, 0xEEEE, 0x2222);
lingot_gui_mainframe_color(&noise_threshold_color, 0x8888, 0x8888, 0x2222);
lingot_gui_mainframe_color(&grid_color, 0x9000, 0x9000, 0x9000);
lingot_gui_mainframe_color(&freq_color, 0xFFFF, 0x2222, 0x2222);
lingot_gui_mainframe_color(¢s_color, 0x3000, 0x3000, 0x3000);
gdk_color_alloc(gdk_colormap_get_system(), &gauge_color);
gdk_color_alloc(gdk_colormap_get_system(), &spectrum_color);
gdk_color_alloc(gdk_colormap_get_system(), &spectrum_background_color);
gdk_color_alloc(gdk_colormap_get_system(), &noise_threshold_color);
gdk_color_alloc(gdk_colormap_get_system(), &grid_color);
gdk_color_alloc(gdk_colormap_get_system(), &freq_color);
gdk_color_black(gdk_colormap_get_system(), &black_color);
gdk_color_alloc(gdk_colormap_get_system(), ¢s_color);
spectrum_legend_font_desc = pango_font_description_from_string(
"Helvetica Plain 7");
gauge_cents_font_desc = pango_font_description_from_string(
"Helvetica Plain 7");
frame->core = lingot_core_new(conf);
lingot_core_start(frame->core);
g_object_unref(_gladeXML);
gtk_main();
}
void lingot_gui_mainframe_destroy(LingotMainFrame* frame) {
lingot_core_stop(frame->core);
lingot_core_destroy(frame->core);
lingot_gauge_destroy(frame->gauge);
lingot_filter_destroy(frame->freq_filter);
lingot_config_destroy(frame->conf);
if (frame->config_dialog)
lingot_gui_config_dialog_destroy(frame->config_dialog);
free(frame);
}
// ---------------------------------------------------------------------------
void lingot_gui_mainframe_redraw(LingotMainFrame* frame) {
lingot_gui_mainframe_draw_gauge(frame);
lingot_gui_mainframe_draw_spectrum_and_labels(frame);
}
// ---------------------------------------------------------------------------
void lingot_gui_mainframe_draw_gauge(LingotMainFrame* frame) {
GdkGC* gc = frame->gauge_area->style->fg_gc[frame->gauge_area->state];
GdkWindow* w = frame->gauge_area->window;
GdkGCValues gv;
gdk_gc_get_values(gc, &gv);
static FLT gauge_size = 90.0;
FLT max = 1.0;
// draws background
if (!frame->pix_stick) {
frame->pix_stick = gdk_pixmap_create_from_xpm_d(w, NULL, NULL,
background2_xpm);
}
gdk_draw_pixmap(w, gc, frame->pix_stick, 0, 0, 0, 0, 160, 100);
// and draws gauge
gdk_gc_set_foreground(gc, &gauge_color);
FLT normalized_error = frame->gauge->position
/ frame->conf->scale->max_offset_rounded;
FLT angle = normalized_error * M_PI / (1.5 * max);
gdk_draw_line(w, gc, gauge_size_x >> 1, gauge_size_y - 1, (gauge_size_x
>> 1) + (int) rint(gauge_size * sin(angle)), gauge_size_y - 1
- (int) rint(gauge_size * cos(angle)));
gdk_gc_set_foreground(gc, ¢s_color);
char buff[10];
sprintf(buff, (frame->conf->scale->max_offset_rounded > 1.0) ? "-%.0f c"
: "-%.1f c", 0.5 * frame->conf->scale->max_offset_rounded);
PangoLayout* layout1 = gtk_widget_create_pango_layout(frame->gauge_area,
buff);
sprintf(buff, (frame->conf->scale->max_offset_rounded > 1.0) ? "+%.0f c"
: "+%.1f c", 0.5 * frame->conf->scale->max_offset_rounded);
PangoLayout* layout2 = gtk_widget_create_pango_layout(frame->gauge_area,
buff);
pango_layout_set_font_description(layout1, gauge_cents_font_desc);
gdk_draw_layout(w, gc, 0.05 * gauge_size_x, 0.8 * gauge_size_y, layout1);
pango_layout_set_font_description(layout2, gauge_cents_font_desc);
gdk_draw_layout(w, gc, 0.75 * gauge_size_x, 0.8 * gauge_size_y, layout2);
g_object_unref(layout1);
g_object_unref(layout2);
gdk_flush();
}
void lingot_gui_mainframe_draw_spectrum_and_labels(LingotMainFrame* frame) {
char* current_tone;
GtkWidget* widget = NULL;
static char error_string[30], freq_string[30];
PangoLayout* layout;
int
spectrum_size_x =
((frame->conf->fft_size > 256) ? (frame->conf->fft_size
>> 1) : 256);
// minimum grid size in pixels
static int minimum_grid_width = 50;
// scale factors (in KHz) to draw the grid. We will choose the smaller
// factor that respects the minimum_grid_width
static double scales[] =
{ 0.01, 0.05, 0.1, 0.2, 0.5, 1, 2, 4, 11, 22, -1.0 };
// spectrum drawing mode
static gboolean spectrum_drawing_filled = TRUE;
// grid division in dB
static FLT grid_db_height = 25;
register unsigned int i;
int j;
int old_j;
unsigned short note_index;
GdkGC * gc =
frame->spectrum_area->style->fg_gc[frame->spectrum_area->state];
GdkPixmap* pixmap = frame->pix_spectrum; //spectrum->window;
GdkGCValues gv;
gdk_gc_get_values(gc, &gv);
// clear all
gdk_gc_set_foreground(gc, &spectrum_background_color);
gdk_draw_rectangle(pixmap, gc, TRUE, 0, 0, spectrum_size_x + 2
* spectrum_x_margin, spectrum_size_y + spectrum_bottom_margin
+ spectrum_top_margin);
gdk_gc_set_foreground(gc, &grid_color);
gdk_draw_line(pixmap, gc, spectrum_x_margin, spectrum_size_y
+ spectrum_top_margin, spectrum_x_margin + spectrum_size_x,
spectrum_size_y + spectrum_top_margin);
// choose scale factor
for (i = 0; scales[i] > 0.0; i++) {
if ((1e3 * scales[i] * frame->conf->fft_size
* frame->conf->oversampling / frame->conf->sample_rate)
> minimum_grid_width)
break;
}
if (scales[i] < 0.0)
i--;
FLT scale = scales[i];
int grid_width = 1e3 * scales[i] * frame->conf->fft_size
* frame->conf->oversampling / frame->conf->sample_rate;
char buff[10];
FLT freq = 0.0;
for (i = 0; i <= spectrum_size_x; i += grid_width) {
gdk_draw_line(pixmap, gc, spectrum_x_margin + i, spectrum_top_margin,
spectrum_x_margin + i, spectrum_size_y + spectrum_top_margin
+ 3);
if (freq == 0.0) {
sprintf(buff, "0 Hz");
} else if (floor(freq) == freq)
sprintf(buff, "%0.0f kHz", freq);
else if (floor(10 * freq) == 10 * freq) {
if (freq <= 1000.0)
sprintf(buff, "%0.0f Hz", 1e3 * freq);
else
sprintf(buff, "%0.1f kHz", freq);
} else {
if (freq <= 100.0)
sprintf(buff, "%0.0f Hz", 1e3 * freq);
else
sprintf(buff, "%0.2f kHz", freq);
}
layout = gtk_widget_create_pango_layout(frame->spectrum_area, buff);
pango_layout_set_font_description(layout, spectrum_legend_font_desc);
gdk_draw_layout(pixmap, gc, spectrum_x_margin - 8 + i, spectrum_size_y
+ spectrum_top_margin + 5, layout);
g_object_unref(layout);
freq += scale;
}
# define PLOT_GAIN 8
sprintf(buff, "dB");
layout = gtk_widget_create_pango_layout(frame->spectrum_area, buff);
pango_layout_set_font_description(layout, spectrum_legend_font_desc);
gdk_draw_layout(pixmap, gc, spectrum_x_margin - 6, 2, layout);
g_object_unref(layout);
int grid_height = (int) (PLOT_GAIN
* log10(pow(10.0, grid_db_height / 10.0))); // dB.
j = 0;
for (i = 0; i <= spectrum_size_y; i += grid_height) {
if (j == 0)
sprintf(buff, " %i", j);
else
sprintf(buff, "%i", j);
layout = gtk_widget_create_pango_layout(frame->spectrum_area, buff);
pango_layout_set_font_description(layout, spectrum_legend_font_desc);
gdk_draw_layout(pixmap, gc, 2, spectrum_size_y + spectrum_top_margin
- i - 5, layout);
g_object_unref(layout);
gdk_draw_line(pixmap, gc, spectrum_x_margin, spectrum_size_y
+ spectrum_top_margin - i, spectrum_x_margin + spectrum_size_x,
spectrum_size_y + spectrum_top_margin - i);
j += grid_db_height;
}
gdk_gc_set_foreground(gc, &noise_threshold_color);
// noise threshold drawing.
j = -1;
for (i = 0; (i < frame->conf->fft_size) && (i < spectrum_size_x); i++) {
if ((i % 10) > 5)
continue;
FLT noise = frame->conf->noise_threshold_nu;
old_j = j;
j = (noise > 1.0) ? (int) (PLOT_GAIN * log10(noise)) : 0; // dB.
if ((old_j >= 0) && (old_j < spectrum_size_y) && (j >= 0) && (j
< spectrum_size_y))
gdk_draw_line(pixmap, gc, spectrum_x_margin + i - 1,
spectrum_size_y + spectrum_top_margin - old_j,
spectrum_x_margin + i, spectrum_size_y
+ spectrum_top_margin - j);
}
gdk_gc_set_foreground(gc, &spectrum_color);
// TODO: change access to frame->core->X
// spectrum drawing.
if (frame->core->running) {
j = -1;
GtkAdjustment* adj = gtk_scrolled_window_get_hadjustment(
frame->spectrum_scroll);
int min = gtk_adjustment_get_value(adj) - spectrum_x_margin;
int max = min + 256 + 3 * spectrum_x_margin;
if (min < 0)
min = 0;
if (max >= spectrum_size_x)
max = spectrum_size_x;
if (frame->core->running) {
for (i = min; i < max; i++) {
j = (frame->core->X[i] > 1.0) ? (int) (PLOT_GAIN * log10(
frame->core->X[i])) : 0; // dB.
if (j >= spectrum_size_y)
j = spectrum_size_y - 1;
if (spectrum_drawing_filled) {
gdk_draw_line(pixmap, gc, spectrum_x_margin + i,
spectrum_size_y + spectrum_top_margin - 1,
spectrum_x_margin + i, spectrum_top_margin
+ spectrum_size_y - j);
} else {
if ((old_j >= 0) && (old_j < spectrum_size_y) && (j >= 0)
&& (j < spectrum_size_y))
gdk_draw_line(pixmap, gc, spectrum_x_margin + i - 1,
spectrum_size_y + spectrum_top_margin - old_j,
spectrum_x_margin + i, spectrum_size_y
+ spectrum_top_margin - j);
old_j = j;
}
}
if (frame->core->freq != 0.0) {
// fundamental frequency mark with a red point.
gdk_gc_set_foreground(gc, &freq_color);
// index of closest sample to fundamental frequency.
i = (int) rint(frame->core->freq * frame->conf->fft_size
* frame->conf->oversampling / frame->conf->sample_rate);
if ((i < frame->conf->fft_size - 1)
&& (i < spectrum_size_x - 1)) {
j = (frame->core->X[i] > 1.0) ? (int) (PLOT_GAIN * log10(
frame->core->X[i])) : 0; // dB.
if (j < spectrum_size_y - 1)
gdk_draw_rectangle(pixmap, gc, TRUE, spectrum_x_margin
+ i - 1, spectrum_size_y + spectrum_top_margin
- j - 1, 3, 3);
}
}
}
}
# undef PLOT_GAIN
gdk_gc_set_foreground(gc, &black_color);
widget = frame->spectrum_area;
gdk_draw_pixmap(widget->window, widget->style->fg_gc[GTK_WIDGET_STATE(
widget)], pixmap, 0, 0, 0, 0, spectrum_size_x + 2
* spectrum_x_margin, spectrum_size_y + spectrum_bottom_margin
+ spectrum_top_margin);
//gdk_flush();
// draw note, error and frequency labels
// ignore continuous component
if (!frame->core->running || isnan(frame->core->freq) || (frame->core->freq
< 10.0)) {
current_tone = "---";
strcpy(error_string, "e = ---");
strcpy(freq_string, "f = ---");
//lingot_gauge_compute(frame->gauge, frame->conf->vr);
} else {
FLT error_cents; // do not use, unfiltered
note_index = lingot_gui_mainframe_get_closest_note_index(
frame->core->freq, frame->conf->scale,
frame->conf->root_frequency_error, &error_cents);
if (note_index == frame->conf->scale->notes) {
note_index = 0;
}
current_tone = frame->conf->scale->note_name[note_index];
sprintf(error_string, "e = %+2.0f cents", frame->gauge->position);
sprintf(freq_string, "f = %6.2f Hz", lingot_filter_filter_sample(
frame->freq_filter, frame->core->freq));
}
gtk_label_set_text(GTK_LABEL(frame->freq_label), freq_string);
gtk_label_set_text(GTK_LABEL(frame->error_label), error_string);
char* markup = g_markup_printf_escaped(
"<span size=\"xx-large\" weight=\"bold\">%s</span>", current_tone);
gtk_label_set_markup(GTK_LABEL(frame->tone_label), markup);
g_free(markup);
}
void lingot_gui_mainframe_change_config(LingotMainFrame* frame,
LingotConfig* conf) {
lingot_core_stop(frame->core);
lingot_core_destroy(frame->core);
// dup.
lingot_config_copy(frame->conf, conf);
// resize the spectrum area
g_object_unref(frame->pix_spectrum);
int
x = ((frame->conf->fft_size > 256) ? (frame->conf->fft_size >> 1)
: 256) + 2 * spectrum_x_margin;
int y = spectrum_size_y + spectrum_top_margin + spectrum_bottom_margin;
gtk_widget_set_size_request(GTK_WIDGET(frame->spectrum_area), x, y);
frame->pix_spectrum
= gdk_pixmap_new(frame->spectrum_area->window, x, y, -1);
gtk_scrolled_window_set_policy(frame->spectrum_scroll,
(frame->conf->fft_size > 512) ? GTK_POLICY_ALWAYS
: GTK_POLICY_NEVER, GTK_POLICY_NEVER);
gtk_widget_set_size_request(GTK_WIDGET(frame->spectrum_scroll), 260 + 2
* spectrum_x_margin, spectrum_size_y + spectrum_bottom_margin
+ spectrum_top_margin + 4
+ ((frame->conf->fft_size > 512) ? 16 : 0));
frame->core = lingot_core_new(frame->conf);
lingot_core_start(frame->core);
// some parameters may have changed
lingot_config_copy(conf, frame->conf);
}