apps/menus/eq_menu.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 Dan Everton
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 #include "config.h"
  23 #include <stdio.h>
  24 #include <stdbool.h>
  25 #include <string.h>
  26 #include "eq_menu.h"
  27 #include "system.h"
  28 #include "kernel.h"
  29 #include "lcd.h"
  30 #include "menu.h"
  31 #include "action.h"
  32 #include "mp3_playback.h"
  33 #include "settings.h"
  34 #include "screens.h"
  35 #include "icons.h"
  36 #include "font.h"
  37 #include "lang.h"
  38 #include "sprintf.h"
  39 #include "talk.h"
  40 #include "misc.h"
  41 #include "sound.h"
  42 #include "dsp.h"
  43 #include "tree.h"
  44 #include "screen_access.h"
  45 #include "keyboard.h"
  46 #include "gui/scrollbar.h"
  47 #include "menu_common.h"
  48 #include "viewport.h"
  49
  50 /*
  51  * Utility functions
  52  */
  53
  54 const char* eq_q_format(char* buffer, size_t buffer_size, int value, const char* unit)
  55 {
  56     snprintf(buffer, buffer_size, "%d.%d %s", value / EQ_USER_DIVISOR,
  57          value % EQ_USER_DIVISOR, unit);
  58     return buffer;
  59 }
  60
  61 const char* eq_precut_format(char* buffer, size_t buffer_size, int value, const char* unit)
  62 {
  63     snprintf(buffer, buffer_size, "%s%d.%d %s", value == 0 ? " " : "-",
  64         value / EQ_USER_DIVISOR, value % EQ_USER_DIVISOR, unit);
  65     return buffer;
  66 }
  67
  68 /*
  69  * Settings functions
  70  */
  71 static void eq_apply(void)
  72 {
  73     int i;
  74     dsp_set_eq(global_settings.eq_enabled);
  75     dsp_set_eq_precut(global_settings.eq_precut);
  76     /* Update all bands */
  77     for(i = 0; i < 5; i++) {
  78         dsp_set_eq_coefs(i);
  79     }
  80 }
  81
  82 static int eq_setting_callback(int action, const struct menu_item_ex *this_item)
  83 {
  84     switch (action)
  85     {
  86         case ACTION_ENTER_MENUITEM:
  87             action = lowlatency_callback(action, this_item);
  88             break;
  89         case ACTION_EXIT_MENUITEM:
  90             eq_apply();
  91             action = lowlatency_callback(action, this_item);
  92             break;
  93     }
  94
  95     return action;
  96 }
  97 MENUITEM_SETTING(eq_enable, &global_settings.eq_enabled, eq_setting_callback);
  98 MENUITEM_SETTING(eq_precut, &global_settings.eq_precut, eq_setting_callback);
  99
 100 MENUITEM_SETTING(cutoff_0, &global_settings.eq_band0_cutoff, eq_setting_callback);
 101 MENUITEM_SETTING(cutoff_1, &global_settings.eq_band1_cutoff, eq_setting_callback);
 102 MENUITEM_SETTING(cutoff_2, &global_settings.eq_band2_cutoff, eq_setting_callback);
 103 MENUITEM_SETTING(cutoff_3, &global_settings.eq_band3_cutoff, eq_setting_callback);
 104 MENUITEM_SETTING(cutoff_4, &global_settings.eq_band4_cutoff, eq_setting_callback);
 105
 106 MENUITEM_SETTING(q_0, &global_settings.eq_band0_q, eq_setting_callback);
 107 MENUITEM_SETTING(q_1, &global_settings.eq_band1_q, eq_setting_callback);
 108 MENUITEM_SETTING(q_2, &global_settings.eq_band2_q, eq_setting_callback);
 109 MENUITEM_SETTING(q_3, &global_settings.eq_band3_q, eq_setting_callback);
 110 MENUITEM_SETTING(q_4, &global_settings.eq_band4_q, eq_setting_callback);
 111
 112 MENUITEM_SETTING(gain_0, &global_settings.eq_band0_gain, eq_setting_callback);
 113 MENUITEM_SETTING(gain_1, &global_settings.eq_band1_gain, eq_setting_callback);
 114 MENUITEM_SETTING(gain_2, &global_settings.eq_band2_gain, eq_setting_callback);
 115 MENUITEM_SETTING(gain_3, &global_settings.eq_band3_gain, eq_setting_callback);
 116 MENUITEM_SETTING(gain_4, &global_settings.eq_band4_gain, eq_setting_callback);
 117
 118 static char* gainitem_get_name(int selected_item, void * data, char *buffer)
 119 {
 120     (void)selected_item;
 121     int *setting = (int*)data;
 122     snprintf(buffer, MAX_PATH, str(LANG_EQUALIZER_GAIN_ITEM), *setting);
 123     return buffer;
 124 }
 125
 126 static int gainitem_speak_item(int selected_item, void * data)
 127 {
 128     (void)selected_item;
 129     int *setting = (int*)data;
 130     talk_number(*setting, false);
 131     talk_id(LANG_EQUALIZER_GAIN_ITEM, true);
 132     return 0;
 133 }
 134
 135 static int do_option(void * param)
 136 {
 137     const struct menu_item_ex *setting = (const struct menu_item_ex*)param;
 138     lowlatency_callback(ACTION_ENTER_MENUITEM, setting);
 139     do_setting_from_menu(setting, NULL);
 140     eq_apply();
 141     lowlatency_callback(ACTION_EXIT_MENUITEM, setting);
 142     return 0;
 143 }
 144
 145 MENUITEM_FUNCTION_DYNTEXT(gain_item_0, MENU_FUNC_USEPARAM,
 146                           do_option, (void*)&gain_0,
 147                           gainitem_get_name, gainitem_speak_item,
 148                           &global_settings.eq_band0_cutoff, NULL, Icon_NOICON);
 149 MENUITEM_FUNCTION_DYNTEXT(gain_item_1, MENU_FUNC_USEPARAM,
 150                           do_option, (void*)&gain_1,
 151                           gainitem_get_name, gainitem_speak_item,
 152                           &global_settings.eq_band1_cutoff, NULL, Icon_NOICON);
 153 MENUITEM_FUNCTION_DYNTEXT(gain_item_2, MENU_FUNC_USEPARAM,
 154                           do_option, (void*)&gain_2,
 155                           gainitem_get_name, gainitem_speak_item,
 156                           &global_settings.eq_band2_cutoff, NULL, Icon_NOICON);
 157 MENUITEM_FUNCTION_DYNTEXT(gain_item_3, MENU_FUNC_USEPARAM,
 158                           do_option, (void*)&gain_3,
 159                           gainitem_get_name, gainitem_speak_item,
 160                           &global_settings.eq_band3_cutoff, NULL, Icon_NOICON);
 161 MENUITEM_FUNCTION_DYNTEXT(gain_item_4, MENU_FUNC_USEPARAM,
 162                           do_option, (void*)&gain_4,
 163                           gainitem_get_name, gainitem_speak_item,
 164                           &global_settings.eq_band4_cutoff, NULL, Icon_NOICON);
 165
 166 MAKE_MENU(gain_menu, ID2P(LANG_EQUALIZER_GAIN), NULL, Icon_NOICON, &gain_item_0,
 167             &gain_item_1, &gain_item_2, &gain_item_3, &gain_item_4);
 168
 169 static const struct menu_item_ex *band_items[3][3] = {
 170     { &cutoff_1, &q_1, &gain_1 },
 171     { &cutoff_2, &q_2, &gain_2 },
 172     { &cutoff_3, &q_3, &gain_3 }
 173 };
 174
 175 static char* centerband_get_name(int selected_item, void * data, char *buffer)
 176 {
 177     (void)selected_item;
 178     int band = (intptr_t)data;
 179     snprintf(buffer, MAX_PATH, str(LANG_EQUALIZER_BAND_PEAK), band);
 180     return buffer;
 181 }
 182
 183 static int centerband_speak_item(int selected_item, void * data)
 184 {
 185     (void)selected_item;
 186     int band = (intptr_t)data;
 187     talk_id(LANG_EQUALIZER_BAND_PEAK, false);
 188     talk_number(band, true);
 189     return 0;
 190 }
 191
 192 static int do_center_band_menu(void* param)
 193 {
 194     int band = (intptr_t)param;
 195     struct menu_item_ex menu;
 196     struct menu_callback_with_desc cb_and_desc;
 197     char desc[MAX_PATH];
 198
 199     cb_and_desc.menu_callback = NULL;
 200     snprintf(desc, MAX_PATH, str(LANG_EQUALIZER_BAND_PEAK), band);
 201     cb_and_desc.desc = desc;
 202     cb_and_desc.icon_id = Icon_EQ;
 203     menu.flags = MT_MENU|(3<<MENU_COUNT_SHIFT)|MENU_HAS_DESC;
 204     menu.submenus = band_items[band-1];
 205     menu.callback_and_desc = &cb_and_desc;
 206     do_menu(&menu, NULL, NULL, false);
 207     return 0;
 208 }
 209
 210 MAKE_MENU(band_0_menu, ID2P(LANG_EQUALIZER_BAND_LOW_SHELF), NULL,
 211             Icon_EQ, &cutoff_0, &q_0, &gain_0);
 212 MENUITEM_FUNCTION_DYNTEXT(band_1_menu, MENU_FUNC_USEPARAM,
 213                           do_center_band_menu, (void*)1,
 214                           centerband_get_name, centerband_speak_item,
 215                           (void*)1, NULL, Icon_EQ);
 216 MENUITEM_FUNCTION_DYNTEXT(band_2_menu, MENU_FUNC_USEPARAM,
 217                           do_center_band_menu, (void*)2,
 218                           centerband_get_name, centerband_speak_item,
 219                           (void*)2, NULL, Icon_EQ);
 220 MENUITEM_FUNCTION_DYNTEXT(band_3_menu, MENU_FUNC_USEPARAM,
 221                           do_center_band_menu, (void*)3,
 222                           centerband_get_name, centerband_speak_item,
 223                           (void*)3, NULL, Icon_EQ);
 224 MAKE_MENU(band_4_menu, ID2P(LANG_EQUALIZER_BAND_HIGH_SHELF), NULL,
 225             Icon_EQ, &cutoff_4, &q_4, &gain_4);
 226
 227 MAKE_MENU(advanced_eq_menu_, ID2P(LANG_EQUALIZER_ADVANCED), NULL, Icon_EQ,
 228             &band_0_menu, &band_1_menu, &band_2_menu, &band_3_menu, &band_4_menu);
 229
 230
 231 enum eq_slider_mode {
 232     GAIN,
 233     CUTOFF,
 234     Q,
 235 };
 236
 237 enum eq_type {
 238     LOW_SHELF,
 239     PEAK,
 240     HIGH_SHELF
 241 };
 242
 243 /* Size of just the slider/srollbar */
 244 #define SCROLLBAR_SIZE 6
 245
 246 /* Draw the UI for a whole EQ band */
 247 static int draw_eq_slider(struct screen * screen, int x, int y,
 248     int width, int cutoff, int q, int gain, bool selected,
 249     enum eq_slider_mode mode, int band)
 250 {
 251     char buf[26];
 252     int steps, min_item, max_item;
 253     int abs_gain = abs(gain);
 254     int x1, x2, y1, total_height;
 255     int w, h;
 256
 257     switch(mode) {
 258     case Q:
 259         steps = EQ_Q_MAX - EQ_Q_MIN;
 260         min_item = q - EQ_Q_STEP - EQ_Q_MIN;
 261         max_item = q + EQ_Q_STEP - EQ_Q_MIN;
 262         break;
 263     case CUTOFF:
 264         steps = EQ_CUTOFF_MAX - EQ_CUTOFF_MIN;
 265         min_item = cutoff - EQ_CUTOFF_FAST_STEP * 2;
 266         max_item = cutoff + EQ_CUTOFF_FAST_STEP * 2;
 267         break;
 268     case GAIN:
 269     default:
 270         steps = EQ_GAIN_MAX - EQ_GAIN_MIN;
 271         min_item = abs(EQ_GAIN_MIN) + gain - EQ_GAIN_STEP * 5;
 272         max_item = abs(EQ_GAIN_MIN) + gain + EQ_GAIN_STEP * 5;
 273         break;
 274     }
 275
 276     /* Start two pixels in, one for border, one for margin */
 277     x1 = x + 2;
 278     y1 = y + 2;
 279
 280     /* Print out the band label */
 281     if (band == 0) {
 282         screen->putsxy(x1, y1, "LS: ");
 283         screen->getstringsize("LS:", &w, &h);
 284     } else if (band == 4) {
 285         screen->putsxy(x1, y1, "HS: ");
 286         screen->getstringsize("HS:", &w, &h);
 287     } else {
 288         snprintf(buf, sizeof(buf),  "PK%d:", band);
 289         screen->putsxy(x1, y1, buf);
 290         screen->getstringsize(buf, &w, &h);
 291     }
 292
 293     screen->getstringsize("A", &w, &h);
 294     x1 += 5*w; /* 4 chars for label + 1 space = 5 */
 295
 296     /* Print out gain part of status line (left justify after label) */
 297     if (mode == GAIN && selected)
 298         screen->set_drawmode(DRMODE_SOLID | DRMODE_INVERSEVID);
 299     else
 300         screen->set_drawmode(DRMODE_SOLID);
 301
 302     snprintf(buf, sizeof(buf), "%s%2d.%d%s", gain < 0 ? "-" : " ",
 303         abs_gain / EQ_USER_DIVISOR, abs_gain % EQ_USER_DIVISOR,
 304         screen->lcdwidth >= 160 ? "dB" : "");
 305     screen->putsxy(x1, y1, buf);
 306     screen->getstringsize(buf, &w, &h);
 307     x1 += w;
 308
 309     /* Print out Q part of status line (right justify) */
 310     if (mode == Q && selected)
 311         screen->set_drawmode(DRMODE_SOLID | DRMODE_INVERSEVID);
 312     else
 313         screen->set_drawmode(DRMODE_SOLID);
 314
 315     snprintf(buf, sizeof(buf), "%d.%d%s", q / EQ_USER_DIVISOR,
 316              q % EQ_USER_DIVISOR, screen->lcdwidth >= 160 ? " Q" : "");
 317     screen->getstringsize(buf, &w, &h);
 318     x2 = x + width - w - 2;
 319     screen->putsxy(x2, y1, buf);
 320
 321     /* Print out cutoff part of status line (center between gain & Q) */
 322     if (mode == CUTOFF && selected)
 323         screen->set_drawmode(DRMODE_SOLID | DRMODE_INVERSEVID);
 324     else
 325         screen->set_drawmode(DRMODE_SOLID);
 326
 327     snprintf(buf, sizeof(buf),  "%5d%s", cutoff,
 328              screen->lcdwidth >= 160 ? "Hz" : "");
 329     screen->getstringsize(buf, &w, &h);
 330     x1 = x1 + (x2 - x1 - w)/2;
 331     screen->putsxy(x1, y1, buf);
 332
 333     /* Draw selection box */
 334     total_height = 3 + h + 1 + SCROLLBAR_SIZE + 3;
 335     screen->set_drawmode(DRMODE_SOLID);
 336     if (selected) {
 337         screen->drawrect(x, y, width, total_height);
 338     }
 339
 340     /* Draw horizontal slider. Reuse scrollbar for this */
 341     gui_scrollbar_draw(screen, x + 3, y1 + h + 1, width - 6, SCROLLBAR_SIZE,
 342                        steps, min_item, max_item, HORIZONTAL);
 343
 344     return total_height;
 345 }
 346
 347 /* Draw's all the EQ sliders. Returns the total height of the sliders drawn */
 348 static void draw_eq_sliders(struct screen * screen, int x, int y,
 349                             int nb_eq_sliders, int start_item,
 350                             int current_band, enum eq_slider_mode mode)
 351 {
 352     int i, gain, q, cutoff;
 353     int height = y;
 354     int *setting = &global_settings.eq_band0_cutoff;
 355
 356     start_item = MIN(start_item, 5-nb_eq_sliders);
 357     for (i=0; i<5; i++) {
 358         cutoff = *setting++;
 359         q = *setting++;
 360         gain = *setting++;
 361
 362         if (i == start_item + nb_eq_sliders)
 363             break;
 364
 365         if (i >= start_item) {
 366             height += draw_eq_slider(screen, x, height, screen->lcdwidth - x - 1,
 367                                      cutoff, q, gain, i == current_band, mode,
 368                                      i);
 369             /* add a margin */
 370             height++;
 371         }
 372     }
 373     if (nb_eq_sliders != 5)
 374         gui_scrollbar_draw(screen, 0, y, SCROLLBAR_SIZE - 1,
 375                            screen->lcdheight - y, 5,
 376                            start_item, start_item + nb_eq_sliders,
 377                            VERTICAL);
 378     return;
 379 }
 380
 381 /* Provides a graphical means of editing the EQ settings */
 382 bool eq_menu_graphical(void)
 383 {
 384     bool exit_request = false;
 385     bool result = true;
 386     bool has_changed = false;
 387     int button;
 388     int *setting;
 389     int current_band, x, y, step, fast_step, min, max, voice_unit;
 390     enum eq_slider_mode mode;
 391     enum eq_type current_type;
 392     char buf[24];
 393     int i, w, h, height, start_item, nb_eq_sliders[NB_SCREENS];
 394     FOR_NB_SCREENS(i)
 395         viewportmanager_theme_enable(i, false, NULL);
 396
 397
 398     FOR_NB_SCREENS(i) {
 399         screens[i].set_viewport(NULL);
 400         screens[i].setfont(FONT_SYSFIXED);
 401         screens[i].clear_display();
 402
 403         /* Figure out how many sliders can be drawn on the screen */
 404         screens[i].getstringsize("A", &w, &h);
 405
 406         /* Total height includes margins (1), text, slider, and line selector (1) */
 407         height = 3 + h + 1 + SCROLLBAR_SIZE + 3;
 408         nb_eq_sliders[i] = screens[i].lcdheight / height;
 409
 410         /* Make sure the "Edit Mode" text fits too */
 411         height = nb_eq_sliders[i]*height + h + 2;
 412         if (height > screens[i].lcdheight)
 413             nb_eq_sliders[i]--;
 414
 415         if (nb_eq_sliders[i] > 5)
 416             nb_eq_sliders[i] = 5;
 417     }
 418
 419     y = h + 1;
 420
 421     /* Start off editing gain on the first band */
 422     mode = GAIN;
 423     current_type = LOW_SHELF;
 424     current_band = 0;
 425
 426     while (!exit_request) {
 427         FOR_NB_SCREENS(i)
 428         {
 429             screens[i].clear_display();
 430
 431             /* Set pointer to the band data currently editable */
 432             if (mode == GAIN) {
 433                 /* gain */
 434                 setting = &global_settings.eq_band0_gain;
 435                 setting += current_band * 3;
 436
 437                 step = EQ_GAIN_STEP;
 438                 fast_step = EQ_GAIN_FAST_STEP;
 439                 min = EQ_GAIN_MIN;
 440                 max = EQ_GAIN_MAX;
 441                 voice_unit = UNIT_DB;
 442
 443                 snprintf(buf, sizeof(buf), str(LANG_SYSFONT_EQUALIZER_EDIT_MODE),
 444                          str(LANG_SYSFONT_GAIN), "(dB)");
 445
 446                 screens[i].putsxy(0, 0, buf);
 447             } else if (mode == CUTOFF) {
 448                 /* cutoff */
 449                 setting = &global_settings.eq_band0_cutoff;
 450                 setting += current_band * 3;
 451
 452                 step = EQ_CUTOFF_STEP;
 453                 fast_step = EQ_CUTOFF_FAST_STEP;
 454                 min = EQ_CUTOFF_MIN;
 455                 max = EQ_CUTOFF_MAX;
 456                 voice_unit = UNIT_HERTZ;
 457
 458                 snprintf(buf, sizeof(buf), str(LANG_SYSFONT_EQUALIZER_EDIT_MODE),
 459                          str(LANG_SYSFONT_EQUALIZER_BAND_CUTOFF), "(Hz)");
 460
 461                 screens[i].putsxy(0, 0, buf);
 462             } else {
 463                 /* Q */
 464                 setting = &global_settings.eq_band0_q;
 465                 setting += current_band * 3;
 466
 467                 step = EQ_Q_STEP;
 468                 fast_step = EQ_Q_FAST_STEP;
 469                 min = EQ_Q_MIN;
 470                 max = EQ_Q_MAX;
 471                 voice_unit = UNIT_INT;
 472
 473                 snprintf(buf, sizeof(buf), str(LANG_SYSFONT_EQUALIZER_EDIT_MODE),
 474                          str(LANG_EQUALIZER_BAND_Q), "");
 475
 476                 screens[i].putsxy(0, 0, buf);
 477             }
 478
 479             /* Draw scrollbar if needed */
 480             if (nb_eq_sliders[i] != 5)
 481             {
 482                 if (current_band == 0) {
 483                     start_item = 0;
 484                 } else if (current_band == 4) {
 485                     start_item = 5 - nb_eq_sliders[i];
 486                 } else {
 487                     start_item = current_band - 1;
 488                 }
 489                 x = SCROLLBAR_SIZE;
 490             } else {
 491                 x = 1;
 492                 start_item = 0;
 493             }
 494             /* Draw equalizer band details */
 495             draw_eq_sliders(&screens[i], x, y, nb_eq_sliders[i], start_item,
 496                             current_band, mode);
 497
 498             screens[i].update();
 499         }
 500
 501         button = get_action(CONTEXT_SETTINGS_EQ,TIMEOUT_BLOCK);
 502
 503         switch (button) {
 504         case ACTION_SETTINGS_DEC:
 505         case ACTION_SETTINGS_DECREPEAT:
 506             *(setting) -= step;
 507             has_changed = true;
 508             if (*(setting) < min)
 509                 *(setting) = min;
 510             break;
 511
 512         case ACTION_SETTINGS_INC:
 513         case ACTION_SETTINGS_INCREPEAT:
 514             *(setting) += step;
 515             has_changed = true;
 516             if (*(setting) > max)
 517                 *(setting) = max;
 518             break;
 519
 520         case ACTION_SETTINGS_INCBIGSTEP:
 521             *(setting) += fast_step;
 522             has_changed = true;
 523             if (*(setting) > max)
 524                 *(setting) = max;
 525             break;
 526
 527         case ACTION_SETTINGS_DECBIGSTEP:
 528             *(setting) -= fast_step;
 529             has_changed = true;
 530             if (*(setting) < min)
 531                 *(setting) = min;
 532             break;
 533
 534         case ACTION_STD_PREV:
 535         case ACTION_STD_PREVREPEAT:
 536             current_band--;
 537             if (current_band < 0)
 538                 current_band = 4; /* wrap around */
 539             break;
 540
 541         case ACTION_STD_NEXT:
 542         case ACTION_STD_NEXTREPEAT:
 543             current_band++;
 544             if (current_band > 4)
 545                 current_band = 0; /* wrap around */
 546             break;
 547
 548         case ACTION_STD_OK:
 549             mode++;
 550             if (mode > Q)
 551                 mode = GAIN; /* wrap around */
 552             break;
 553
 554         case ACTION_STD_CANCEL:
 555             exit_request = true;
 556             result = false;
 557             break;
 558         default:
 559             if(default_event_handler(button) == SYS_USB_CONNECTED) {
 560                 exit_request = true;
 561                 result = true;
 562             }
 563             break;
 564         }
 565
 566         /* Update the filter if the user changed something */
 567         if (has_changed) {
 568             dsp_set_eq_coefs(current_band);
 569             has_changed = false;
 570         }
 571     }
 572
 573     /* Reset screen settings */
 574     FOR_NB_SCREENS(i)
 575     {
 576         screens[i].setfont(FONT_UI);
 577         screens[i].clear_display();
 578         screens[i].set_viewport(NULL);
 579         viewportmanager_theme_undo(i, false);
 580     }
 581     return result;
 582 }
 583
 584 static bool eq_save_preset(void)
 585 {
 586     /* make sure that the eq is enabled for setting saving */
 587     bool enabled = global_settings.eq_enabled;
 588     global_settings.eq_enabled = true;
 589
 590     bool result = settings_save_config(SETTINGS_SAVE_EQPRESET);
 591
 592     global_settings.eq_enabled = enabled;
 593
 594     return result;
 595 }
 596
 597 /* Allows browsing of preset files */
 598 bool eq_browse_presets(void)
 599 {
 600     return rockbox_browse(EQS_DIR, SHOW_CFG);
 601 }
 602
 603 MENUITEM_FUNCTION(eq_graphical, 0, ID2P(LANG_EQUALIZER_GRAPHICAL),
 604                     (int(*)(void))eq_menu_graphical, NULL, lowlatency_callback,
 605                     Icon_EQ);
 606 MENUITEM_FUNCTION(eq_save, 0, ID2P(LANG_EQUALIZER_SAVE),
 607                     (int(*)(void))eq_save_preset, NULL, NULL, Icon_NOICON);
 608 MENUITEM_FUNCTION(eq_browse, 0, ID2P(LANG_EQUALIZER_BROWSE),
 609                     (int(*)(void))eq_browse_presets, NULL, lowlatency_callback,
 610                     Icon_NOICON);
 611
 612 MAKE_MENU(equalizer_menu, ID2P(LANG_EQUALIZER), NULL, Icon_EQ,
 613         &eq_enable, &eq_graphical, &eq_precut, &gain_menu,
 614         &advanced_eq_menu_, &eq_save, &eq_browse);
 615