summaryrefslogtreecommitdiffstats
path: root/apps/settings.c
blob: 56dcd0af0992f35b7bcccabc06d324634777fda0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 by wavey@wavey.org
 * RTC config saving code (C) 2002 by hessu@hes.iki.fi
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include <stdio.h>
#include <stddef.h>
#include <limits.h>
#include "config.h"
#include "kernel.h"
#include "thread.h"
#include "settings.h"
#include "disk.h"
#include "panic.h"
#include "debug.h"
#include "button.h"
#include "usb.h"
#include "backlight.h"
#include "lcd.h"
#include "audio.h"
#include "mp3_playback.h"
#include "talk.h"
#include "string.h"
#include "ata.h"
#include "fat.h"
#include "power.h"
#include "backlight.h"
#include "powermgmt.h"
#include "status.h"
#include "atoi.h"
#include "screens.h"
#include "ctype.h"
#include "file.h"
#include "errno.h"
#include "system.h"
#include "misc.h"
#include "timefuncs.h"
#ifdef HAVE_LCD_BITMAP
#include "icons.h"
#include "font.h"
#include "peakmeter.h"
#include "hwcompat.h"
#endif
#include "lang.h"
#include "language.h"
#include "wps-display.h"
#include "powermgmt.h"
#include "bookmark.h"
#include "sprintf.h"
#include "keyboard.h"
#include "version.h"
#include "rtc.h"
#include "sound.h"
#if CONFIG_HWCODEC == MAS3507D
void dac_line_in(bool enable);
#endif
struct user_settings global_settings;
const char rec_base_directory[] = REC_BASE_DIR;



#define CONFIG_BLOCK_VERSION 20
#define CONFIG_BLOCK_SIZE 512
#define RTC_BLOCK_SIZE 44

#ifdef HAVE_LCD_BITMAP
#define MAX_LINES 10
#else
#define MAX_LINES 2
#endif

long lasttime = 0;
static long config_sector = 0;  /* mark uninitialized */
static unsigned char config_block[CONFIG_BLOCK_SIZE];


/* descriptor for a configuration value */
/* (watch the struct packing and member sizes to keep this small) */
struct bit_entry
{
    /* how many bits within the bitfield (1-32), MSB set if value is signed */
    unsigned char bit_size; /* min 6+1 bit */
    /* how many bytes in the global_settings struct (1,2,4) */
    unsigned char byte_size; /* min 3 bits */
    /* store position in global_settings struct */
    short settings_offset; /* min 9 bit, better 10 */
    /* default value */
    int default_val; /* min 15 bit */ 
    /* variable name in a .cfg file, NULL if not to be saved */
    const char* cfg_name;
    /* set of values, or NULL for a numerical value */
    const char* cfg_val;
};

/********************************************

Config block as saved on the battery-packed RTC user RAM memory block
of 44 bytes, starting at offset 0x14 of the RTC memory space.

offset  abs
0x00    0x14    "Roc"   header signature: 0x52 0x6f 0x63
0x03    0x17    <version byte: 0x0>
0x04    0x18    start of bit-table
...
0x28,0x29 unused, not reachable by set_bits() without disturbing the next 2
0x2A,0x2B <checksum 2 bytes: xor of 0x00-0x29>

Config memory is reset to 0xff and initialized with 'factory defaults' if
a valid header & checksum is not found. Config version number is only
increased when information is _relocated_ or space is _reused_ so that old
versions can read and modify configuration changed by new versions. 
Memory locations not used by a given version should not be
modified unless the header & checksum test fails.

Rest of config block, only saved to disk:
0x2C  start of 2nd bit-table
...
0xB8  (char[20]) WPS file
0xCC  (char[20]) Lang file
0xE0  (char[20]) Font file
0xF4-0xFF  <unused>

*************************************/

/* The persistence of the global_settings members is now controlled by
   the two tables below, rtc_bits and hd_bits. 
   New values can just be added to the end, it will be backwards 
   compatible. If you however change order, bitsize, etc. of existing
   entries, you need to bump CONFIG_BLOCK_VERSION to break compatibility.
*/


/* convenience macro for both size and offset of global_settings member */
#define S_O(val) sizeof(global_settings.val), offsetof(struct user_settings, val)
#define SIGNED 0x80 /* for bitsize value with signed attribute */

/* some sets of values which are used more than once, to save memory */
static const char off_on[] = "off,on";
static const char off_on_ask[] = "off,on,ask";
static const char graphic_numeric[] = "graphic,numeric";
static const char off_number_spell_hover[] = "off,number,spell,hover";

#ifdef HAVE_RECORDING
/* keep synchronous to trig_durations and
   trigger_times in settings_apply_trigger */
static const char trig_durations_conf [] =
                  "0s,1s,2s,5s,10s,15s,20s,25s,30s,1min,2min,5min,10min";
#endif

/* the part of the settings which ends up in the RTC RAM, where available 
   (those we either need early, save frequently, or without spinup) */
static const struct bit_entry rtc_bits[] =
{
    /* placeholder, containing the size information */
    {9, 0, 0, 0, NULL, NULL }, /* 9 bit to tell how far this is populated */

    /* # of bits, offset+size, default, .cfg name, .cfg values */
    /* sound */
    {7, S_O(volume), 70, "volume", NULL }, /* 0...100 */
    {8 | SIGNED, S_O(balance), 0, "balance", NULL }, /* -100...100 */
    {5 | SIGNED, S_O(bass), 0, "bass", NULL }, /* -15..+15 / -12..+12 */
    {5 | SIGNED, S_O(treble), 0, "treble", NULL }, /* -15..+15 / -12..+12 */
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    {5, S_O(loudness), 0, "loudness", NULL }, /* 0...17 */
    {3, S_O(avc), 0, "auto volume", "off,20ms,2,4,8" },
    {1, S_O(superbass), false, "superbass", off_on },
#endif
    {3, S_O(channel_config), 0, "channels",
        "stereo,mono,custom,mono left,mono right,karaoke" },
    {8, S_O(stereo_width), 100, "stereo width", NULL},
    /* playback */
    {2, S_O(resume), RESUME_ASK, "resume", "off,ask,ask once,on" },
    {1, S_O(playlist_shuffle), false, "shuffle", off_on },
    {16 | SIGNED, S_O(resume_index), -1, NULL, NULL },
    {16 | SIGNED, S_O(resume_first_index), 0, NULL, NULL },
    {32 | SIGNED, S_O(resume_offset), -1, NULL, NULL },
    {32 | SIGNED, S_O(resume_seed), -1, NULL, NULL },
    {2, S_O(repeat_mode), REPEAT_ALL, "repeat", "off,all,one" },
    /* LCD */
    {6, S_O(contrast), 40, "contrast", NULL },
#ifdef CONFIG_BACKLIGHT
#ifdef HAVE_CHARGING
    {1, S_O(backlight_on_when_charging), false, 
        "backlight when plugged", off_on },
#endif
    {5, S_O(backlight_timeout), 5, "backlight timeout",
        "off,on,1,2,3,4,5,6,7,8,9,10,15,20,25,30,45,60,90" },
#endif /* CONFIG_BACKLIGHT */
#ifdef HAVE_LCD_BITMAP
    {1, S_O(invert), false, "invert", off_on },
    {1, S_O(flip_display), false, "flip display", off_on },
    /* display */
    {1, S_O(invert_cursor), false, "invert cursor", off_on },
    {1, S_O(statusbar), true, "statusbar", off_on },
    {1, S_O(scrollbar), true, "scrollbar", off_on },
#if CONFIG_KEYPAD == RECORDER_PAD
    {1, S_O(buttonbar), true, "buttonbar", off_on },
#endif
    {1, S_O(volume_type), 0, "volume display", graphic_numeric },
    {1, S_O(battery_display), 0, "battery display", graphic_numeric },
    {1, S_O(timeformat), 0, "time format", "24hour,12hour" },
#endif
    {1, S_O(show_icons), true, "show icons", off_on },
    /* system */
    {4, S_O(poweroff), 10,
        "idle poweroff", "off,1,2,3,4,5,6,7,8,9,10,15,30,45,60" },
    {18, S_O(runtime), 0, NULL, NULL },
    {18, S_O(topruntime), 0, NULL, NULL },
    {15, S_O(max_files_in_playlist), 10000, 
        "max files in playlist", NULL }, /* 1000...20000 */
    {14, S_O(max_files_in_dir), 400, 
        "max files in dir", NULL }, /* 50...10000 */
    /* battery */
    {12, S_O(battery_capacity), BATTERY_CAPACITY_MIN, "battery capacity",
         NULL }, /* 1500...3200 for NiMH, 2200...3200 for LiIon,
                     500...1500 for Alkaline */
#ifdef HAVE_CHARGING
    {1, S_O(car_adapter_mode), false, "car adapter mode", off_on },
#endif
    /* tuner */
#ifdef CONFIG_TUNER
    {1, S_O(fm_force_mono), false, "force fm mono", off_on },
    {8, S_O(last_frequency), 0, NULL, NULL }, /* Default: MIN_FREQ */
#endif

    /* new stuff to be added here */
    /* If values are just added to the end, no need to bump the version. */

#if BATTERY_TYPES_COUNT > 1
    {1, S_O(battery_type), 0, "battery type", "alkaline,nimh" },
#endif

    /* Current sum of bits: 259 (worst case) */
    /* Sum of all bit sizes must not grow beyond 288! */
};


/* the part of the settings which ends up in HD sector only */
static const struct bit_entry hd_bits[] =
{
    /* This table starts after the 44 RTC bytes = 352 bits. */
    /* Here we need 11 bits to tell how far this is populated. */

    /* placeholder, containing the size information */
    {11, 0, 0, 0, NULL, NULL }, /* 11 bit to tell how far this is populated */

    /* # of bits, offset+size, default, .cfg name, .cfg values */
    /* more display */
#ifdef CONFIG_BACKLIGHT
    {1, S_O(caption_backlight), false, "caption backlight", off_on },
#endif
    {4, S_O(scroll_speed), 9, "scroll speed", NULL }, /* 0...15 */
    {7, S_O(scroll_step), 6, "scroll step", NULL }, /* 1...112 */
    {8, S_O(scroll_delay), 100, "scroll delay", NULL }, /* 0...250 */
    {8, S_O(bidir_limit), 50, "bidir limit", NULL }, /* 0...200 */
#ifdef HAVE_LCD_CHARCELLS
    {3, S_O(jump_scroll), 0, "jump scroll", NULL }, /* 0...5 */
    {8, S_O(jump_scroll_delay), 50, "jump scroll delay", NULL }, /* 0...250 */
#endif
    /* more playback */
    {1, S_O(play_selected), true, "play selected", off_on },
    {1, S_O(fade_on_stop), true, "volume fade", off_on },
    {4, S_O(ff_rewind_min_step), FF_REWIND_1000, 
        "scan min step", "1,2,3,4,5,6,8,10,15,20,25,30,45,60" },
    {4, S_O(ff_rewind_accel), 3, "scan accel", NULL },
    {3, S_O(buffer_margin), 0, "antiskip", NULL },
    /* disk */
#ifndef HAVE_MMC
#ifdef HAVE_ATA_POWER_OFF
    {1, S_O(disk_poweroff), false, "disk poweroff", off_on },
#endif
    {8, S_O(disk_spindown), 5, "disk spindown", NULL },
#endif
    /* browser */
    {3, S_O(dirfilter), SHOW_MUSIC, 
        "show files", "all,supported,music,playlists,id3 database" },
    {1, S_O(sort_case), false, "sort case", off_on },
    {1, S_O(browse_current), false, "follow playlist", off_on },
    /* playlist */
    {1, S_O(playlist_viewer_icons), true, "playlist viewer icons", off_on },
    {1, S_O(playlist_viewer_indices), true,
        "playlist viewer indices", off_on },
    {1, S_O(playlist_viewer_track_display), 0, 
        "playlist viewer track display", "track name,full path" },
    {2, S_O(recursive_dir_insert), RECURSE_OFF, 
        "recursive directory insert", off_on_ask },
    /* bookmarks */
    {3, S_O(autocreatebookmark), BOOKMARK_NO, "autocreate bookmarks", 
        "off,on,ask,recent only - on,recent only - ask" },
    {2, S_O(autoloadbookmark), BOOKMARK_NO,
        "autoload bookmarks", off_on_ask },
    {2, S_O(usemrb), BOOKMARK_NO, 
        "use most-recent-bookmarks", "off,on,unique only" },
#ifdef HAVE_LCD_BITMAP
    /* peak meter */
    {5, S_O(peak_meter_clip_hold), 16, "peak meter clip hold", /* 0...25 */
        "on,1,2,3,4,5,6,7,8,9,10,15,20,25,30,45,60,90,2min,3min,5min,10min,20min,45min,90min" },
    {1, S_O(peak_meter_performance), false, "peak meter busy", off_on },
    {5, S_O(peak_meter_hold), 3, "peak meter hold", 
        "off,200ms,300ms,500ms,1,2,3,4,5,6,7,8,9,10,15,20,30,1min" },
    {7, S_O(peak_meter_release), 8, "peak meter release", NULL }, /* 0...126 */
    {1, S_O(peak_meter_dbfs), true, "peak meter dbfs", off_on },
    {7, S_O(peak_meter_min), 60, "peak meter min", NULL }, /* 0...100 */
    {7, S_O(peak_meter_max), 0, "peak meter max", NULL }, /* 0...100 */
#endif
#if CONFIG_HWCODEC == MAS3587F
    /* recording */
    {1, S_O(rec_editable), false, "editable recordings", off_on },
    {4, S_O(rec_timesplit), 0, "rec timesplit", /* 0...15 */
        "off,00:05,00:10,00:15,00:30,01:00,01:14,01:20,02:00,04:00,06:00,08:00,10:00,12:00,18:00,24:00" },
    {1, S_O(rec_channels), 0, "rec channels", "stereo,mono" },
    {4, S_O(rec_mic_gain), 8, "rec mic gain", NULL },
    {3, S_O(rec_quality), 5, "rec quality", NULL },
    {2, S_O(rec_source), 0, /* 0=mic */
        "rec source", "mic,line,spdif" },
    {3, S_O(rec_frequency), 0, /* 0=44.1kHz */
        "rec frequency", "44,48,32,22,24,16" },
    {4, S_O(rec_left_gain), 2, /* 0dB */
        "rec left gain", NULL }, /* 0...15 */
    {4, S_O(rec_right_gain), 2, /* 0dB */
        "rec right gain", NULL }, /* 0...15 */
    {5, S_O(rec_prerecord_time), 0, "prerecording time", NULL }, /* 0...30 */
    {1, S_O(rec_directory), 0, /* rec_base_directory */
        "rec directory", REC_BASE_DIR ",current" },
#endif
#if CONFIG_HWCODEC == MAS3507D
    {1, S_O(line_in), false, "line in", off_on },
#endif
    /* voice */
    {2, S_O(talk_dir), 0, "talk dir", off_number_spell_hover },
    {2, S_O(talk_file), 0, "talk file", off_number_spell_hover },
    {1, S_O(talk_menu), true, "talk menu", off_on },

    /* If values are just added to the end, no need to bump the version. */
    {2, S_O(sort_file), 0, "sort files", "alpha,oldest,newest,type" },
    {2, S_O(sort_dir), 0, "sort dirs", "alpha,oldest,newest" },
    {7, S_O(mdb_strength), 0, "mdb strength", NULL},
    {7, S_O(mdb_harmonics), 0, "mdb harmonics", NULL},
    {9, S_O(mdb_center), 0, "mdb center", NULL},
    {9, S_O(mdb_shape), 0, "mdb shape", NULL},
    {1, S_O(mdb_enable), 0, "mdb enable", off_on},
    {1, S_O(id3_v1_first), 0, "id3 tag priority", "v2-v1,v1-v2"},

#ifdef HAVE_RECORDING
    {1, S_O(rec_startup), false, "rec screen on startup", off_on },

    /* values for the trigger */
    {8 | SIGNED, S_O(rec_start_thres), -35, "trigger start threshold", NULL},
    {8 | SIGNED, S_O(rec_stop_thres), -45, "trigger stop threshold", NULL},
    {4, S_O(rec_start_duration), 0, "trigger start duration", trig_durations_conf},
    {4, S_O(rec_stop_postrec), 2, "trigger stop postrec", trig_durations_conf},
    {4, S_O(rec_stop_gap), 1, "trigger min gap", trig_durations_conf},
    {4, S_O(rec_trigger_mode ), 1, "trigger mode", "off,no rearm,rearm"},
#endif

    /* new stuff to be added at the end */
		    
    /* Sum of all bit sizes must not grow beyond 0xB8*8 = 1472 */
};


/* helper function to extract n (<=32) bits from an arbitrary position */
static unsigned long get_bits(
    const unsigned long* p, /* the start of the bitfield array */
    unsigned int from, /* bit no. to start reading from */
    unsigned int size) /* how many bits to read */
{
    unsigned int bit_index;
    unsigned int bits_to_use;

    unsigned long mask;
    unsigned long result;

    if (size==1)
    {   /* short cut */
        return (p[from/32] & 1<<from%32) != 0;
    }

    result = 0;
    while (size)
    {
        bit_index = from % 32;
        bits_to_use = MIN(32 - bit_index, size);
        mask = 0xFFFFFFFF >> (32 - bits_to_use);
        mask <<= bit_index;

        result <<= bits_to_use; /* from last round */
        result |= (p[from/32] & mask) >> bit_index;

        from += bits_to_use;
        size -= bits_to_use;
    }

    return result;
}

/* helper function to set n (<=32) bits to an arbitrary position */
static void set_bits(
    unsigned long* p, /* the start of the bitfield array */
    unsigned int from, /* bit no. to start writing into */
    unsigned int size, /* how many bits to change */
    unsigned long value) /* content (LSBs will be taken) */
{
    unsigned int end;
    unsigned int word_index, bit_index;
    unsigned int bits_to_use;

    unsigned long mask;

    if (size==1)
    {   /* short cut */
        if (value & 1)
            p[from/32] |= 1<<from%32;
        else
            p[from/32] &= ~(1<<from%32);
        return;
    }

    end = from + size - 1;

    /* write back to front, least to most significant */
    while (size)
    {
        word_index = end / 32;
        bit_index = (end % 32) + 1;
        bits_to_use = MIN(bit_index, size);
        bit_index -= bits_to_use;
        mask = 0xFFFFFFFF >> (32 - bits_to_use);
        mask <<= bit_index;

        p[word_index] = (p[word_index] & ~mask) | (value<<bit_index & mask);

        value >>= bits_to_use;
        size -= bits_to_use;
        end -= bits_to_use;
    }
}

/*
 * Calculates the checksum for the config block and returns it
 */

static unsigned short calculate_config_checksum(const unsigned char* buf)
{
    unsigned int i;
    unsigned char cksum[2];
    cksum[0] = cksum[1] = 0;
    
    for (i=0; i < RTC_BLOCK_SIZE - 2; i+=2 ) {
        cksum[0] ^= buf[i];
        cksum[1] ^= buf[i+1];
    }

    return (cksum[0] << 8) | cksum[1];
}

/*
 * initialize the config block buffer
 */
static void init_config_buffer( void )
{
    DEBUGF( "init_config_buffer()\n" );
    
    /* reset to 0 - all unused */
    memset(config_block, 0, CONFIG_BLOCK_SIZE);
    /* insert header */
    config_block[0] = 'R';
    config_block[1] = 'o';
    config_block[2] = 'c';
    config_block[3] = CONFIG_BLOCK_VERSION;
}

/*
 * save the config block buffer to disk or RTC RAM
 */
static int save_config_buffer( void )
{
    unsigned short chksum;
#ifdef HAVE_RTC
    unsigned int i;
#endif

    /* update the checksum in the end of the block before saving */
    chksum = calculate_config_checksum(config_block);
    config_block[ RTC_BLOCK_SIZE - 2 ] = chksum >> 8;
    config_block[ RTC_BLOCK_SIZE - 1 ] = chksum & 0xff;

#ifdef HAVE_RTC    
    /* FIXME: okay, it _would_ be cleaner and faster to implement rtc_write so
       that it would write a number of bytes at a time since the RTC chip
       supports that, but this will have to do for now 8-) */
    for (i=0; i < RTC_BLOCK_SIZE; i++ ) {
        int r = rtc_write(0x14+i, config_block[i]);
        if (r) {
            DEBUGF( "save_config_buffer: rtc_write failed at addr 0x%02x: %d\n",
                    14+i, r );
            return r;
        }
    }

#endif

    if (config_sector != 0)
        ata_delayed_write( config_sector, config_block);
    else
        return -1;

    return 0;
}

/*
 * load the config block buffer from disk or RTC RAM
 */
static int load_config_buffer(int which)
{
    unsigned short chksum;
    bool correct = false;

   
    DEBUGF( "load_config_buffer()\n" );

    if (which & SETTINGS_HD)
    {
        if (config_sector != 0) {
            ata_read_sectors(IF_MV2(0,) config_sector, 1,  config_block);
            /* calculate the checksum, check it and the header */
            chksum = calculate_config_checksum(config_block);
        
            if (config_block[0] == 'R' &&
                config_block[1] == 'o' &&
                config_block[2] == 'c' &&
                config_block[3] == CONFIG_BLOCK_VERSION &&
                (chksum >> 8) == config_block[RTC_BLOCK_SIZE - 2] &&
                (chksum & 0xff) == config_block[RTC_BLOCK_SIZE - 1])
            {
                DEBUGF( "load_config_buffer: header & checksum test ok\n" );
                correct = true;
            }
        }
    }

#ifdef HAVE_RTC    
    if(!correct)
    {
        /* If the disk sector was incorrect, reinit the buffer */
        memset(config_block, 0, CONFIG_BLOCK_SIZE);
    }

    if (which & SETTINGS_RTC)
    {
        unsigned int i;
        unsigned char rtc_block[RTC_BLOCK_SIZE];

        /* read rtc block */
        for (i=0; i < RTC_BLOCK_SIZE; i++ )
            rtc_block[i] = rtc_read(0x14+i);

        chksum = calculate_config_checksum(rtc_block);
    
        /* if rtc block is ok, use that */
        if (rtc_block[0] == 'R' &&
            rtc_block[1] == 'o' &&
            rtc_block[2] == 'c' &&
            rtc_block[3] == CONFIG_BLOCK_VERSION &&
            (chksum >> 8) == rtc_block[RTC_BLOCK_SIZE - 2] &&
            (chksum & 0xff) == rtc_block[RTC_BLOCK_SIZE - 1])
        {
            memcpy(config_block, rtc_block, RTC_BLOCK_SIZE);
            correct = true;
        }
    }
#endif
    
    if ( !correct ) {
        /* if checksum is not valid, clear the config buffer */
        DEBUGF( "load_config_buffer: header & checksum test failed\n" );
        init_config_buffer();
        return -1;
    }

    return 0;
}


/* helper to save content of global_settings into a bitfield,
   as described per table */ 
static void save_bit_table(const struct bit_entry* p_table, int count, int bitstart)
{
    unsigned long* p_bitfield = (unsigned long*)config_block; /* 32 bit addr. */
    unsigned long value; /* 32 bit content */
    int i;
    const struct bit_entry* p_run = p_table; /* start after the size info */
    int curr_bit = bitstart + p_table->bit_size;
    count--; /* first is excluded from loop */

    for (i=0; i<count; i++)
    {
        p_run++;
        /* could do a memcpy, but that would be endian-dependent */
        switch(p_run->byte_size)
        {
        case 1:
            value = ((unsigned char*)&global_settings)[p_run->settings_offset];
            break;
        case 2:
            value = ((unsigned short*)&global_settings)[p_run->settings_offset/2];
            break;
        case 4:
            value = ((unsigned int*)&global_settings)[p_run->settings_offset/4];
            break;
        default:
            DEBUGF( "illegal size!" );
            continue;
        }
        set_bits(p_bitfield, curr_bit, p_run->bit_size & 0x3F, value);
        curr_bit += p_run->bit_size & 0x3F;
    }
    set_bits(p_bitfield, bitstart, p_table->bit_size, /* write size */
        curr_bit); /* = position after last element */
}

/*
 * figure out the config sector from the partition table and the
 * mounted file system 
 */
void settings_calc_config_sector(void)
{
#ifdef SIMULATOR
    config_sector = 61;
#else
    int i;
    long partition_start;
    long sector = 0;

    if (fat_startsector(IF_MV(0)) != 0)    /* There is a partition table */
    {
        sector = 61;
        for (i = 0; i < 4; i++)
        {
            partition_start = disk_partinfo(i)->start;
            if (partition_start != 0 && (partition_start - 2) < sector)
                sector = partition_start - 2;
        }
        if (sector < 0)
            sector = 0;
    }
    
    config_sector = sector;
#endif
}

/*
 * persist all runtime user settings to disk or RTC RAM
 */
int settings_save( void )
{
    {
        int elapsed_secs;

        elapsed_secs = (current_tick - lasttime) / HZ;
        global_settings.runtime += elapsed_secs;
        lasttime += (elapsed_secs * HZ);

        if ( global_settings.runtime > global_settings.topruntime )
            global_settings.topruntime = global_settings.runtime;
    }

    /* serialize scalar values into RTC and HD sector, specified via table */
    save_bit_table(rtc_bits, sizeof(rtc_bits)/sizeof(rtc_bits[0]), 4*8);
    save_bit_table(hd_bits, sizeof(hd_bits)/sizeof(hd_bits[0]), RTC_BLOCK_SIZE*8);

    strncpy(&config_block[0xb8], global_settings.wps_file, MAX_FILENAME);
    strncpy(&config_block[0xcc], global_settings.lang_file, MAX_FILENAME);
    strncpy(&config_block[0xe0], global_settings.font_file, MAX_FILENAME);

    if(save_config_buffer())
    {
        lcd_clear_display();
#ifdef HAVE_LCD_CHARCELLS
        lcd_puts(0, 0, str(LANG_SETTINGS_SAVE_PLAYER));
        lcd_puts(0, 1, str(LANG_SETTINGS_BATTERY_PLAYER));
#else
        lcd_puts(4, 2, str(LANG_SETTINGS_SAVE_RECORDER));
        lcd_puts(2, 4, str(LANG_SETTINGS_BATTERY_RECORDER));
        lcd_update();
#endif
        sleep(HZ*2);
        return -1;
    }
    return 0;
}

#ifdef HAVE_LCD_BITMAP
/**
 * Applies the range infos stored in global_settings to 
 * the peak meter. 
 */
void settings_apply_pm_range(void)
{
    int pm_min, pm_max;

    /* depending on the scale mode (dBfs or percent) the values
       of global_settings.peak_meter_dbfs have different meanings */
    if (global_settings.peak_meter_dbfs) 
    {
        /* convert to dBfs * 100          */
        pm_min = -(((int)global_settings.peak_meter_min) * 100);
        pm_max = -(((int)global_settings.peak_meter_max) * 100);
    }
    else 
    {
        /* percent is stored directly -> no conversion */
        pm_min = global_settings.peak_meter_min;
        pm_max = global_settings.peak_meter_max;
    }

    /* apply the range */
    peak_meter_init_range(global_settings.peak_meter_dbfs, pm_min, pm_max);
}
#endif /* HAVE_LCD_BITMAP */

void sound_settings_apply(void)
{
    sound_set(SOUND_BASS, global_settings.bass);
    sound_set(SOUND_TREBLE, global_settings.treble);
    sound_set(SOUND_BALANCE, global_settings.balance);
    sound_set(SOUND_VOLUME, global_settings.volume);
    sound_set(SOUND_CHANNELS, global_settings.channel_config);
    sound_set(SOUND_STEREO_WIDTH, global_settings.stereo_width);
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    sound_set(SOUND_LOUDNESS, global_settings.loudness);
    sound_set(SOUND_AVC, global_settings.avc);
    sound_set(SOUND_MDB_STRENGTH, global_settings.mdb_strength);
    sound_set(SOUND_MDB_HARMONICS, global_settings.mdb_harmonics);
    sound_set(SOUND_MDB_CENTER, global_settings.mdb_center);
    sound_set(SOUND_MDB_SHAPE, global_settings.mdb_shape);
    sound_set(SOUND_MDB_ENABLE, global_settings.mdb_enable);
    sound_set(SOUND_SUPERBASS, global_settings.superbass);
#endif
}

void settings_apply(void)
{
    char buf[64];

    sound_settings_apply();

    audio_set_buffer_margin(global_settings.buffer_margin);
    
    lcd_set_contrast(global_settings.contrast);
    lcd_scroll_speed(global_settings.scroll_speed);
    backlight_set_timeout(global_settings.backlight_timeout);
    backlight_set_on_when_charging(global_settings.backlight_on_when_charging);
    ata_spindown(global_settings.disk_spindown);
#if CONFIG_HWCODEC == MAS3507D
    dac_line_in(global_settings.line_in);
#endif
#ifdef HAVE_ATA_POWER_OFF
    ata_poweroff(global_settings.disk_poweroff);
#endif

    set_poweroff_timeout(global_settings.poweroff);

    set_battery_capacity(global_settings.battery_capacity);
#if BATTERY_TYPES_COUNT > 1
    set_battery_type(global_settings.battery_type);
#endif

#ifdef HAVE_LCD_BITMAP
    lcd_set_invert_display(global_settings.invert);
    lcd_set_flip(global_settings.flip_display);
    button_set_flip(global_settings.flip_display);
    lcd_update(); /* refresh after flipping the screen */
    settings_apply_pm_range();
    peak_meter_init_times(
        global_settings.peak_meter_release, global_settings.peak_meter_hold, 
        global_settings.peak_meter_clip_hold);
#endif

    if ( global_settings.wps_file[0] && 
         global_settings.wps_file[0] != 0xff ) {
        snprintf(buf, sizeof buf, ROCKBOX_DIR "/%s.wps",
                 global_settings.wps_file);
        wps_load(buf, false);
    }
    else
        wps_reset();

#ifdef HAVE_LCD_BITMAP
    if ( global_settings.font_file[0] &&
         global_settings.font_file[0] != 0xff ) {
        snprintf(buf, sizeof buf, ROCKBOX_DIR FONT_DIR "/%s.fnt",
                 global_settings.font_file);
        font_load(buf);
    }
    else
        font_reset();

    lcd_scroll_step(global_settings.scroll_step);
#else
    lcd_jump_scroll(global_settings.jump_scroll);
    lcd_jump_scroll_delay(global_settings.jump_scroll_delay * (HZ/10));
#endif
    lcd_bidir_scroll(global_settings.bidir_limit);
    lcd_scroll_delay(global_settings.scroll_delay * (HZ/10));

    if ( global_settings.lang_file[0] &&
         global_settings.lang_file[0] != 0xff ) {
        snprintf(buf, sizeof buf, ROCKBOX_DIR LANG_DIR "/%s.lng",
                 global_settings.lang_file);
        lang_load(buf);
        talk_init(); /* use voice of same language */
    }

    set_car_adapter_mode(global_settings.car_adapter_mode);
}


/* helper to load global_settings from a bitfield, as described per table */
static void load_bit_table(const struct bit_entry* p_table, int count, int bitstart)
{
    unsigned long* p_bitfield = (unsigned long*)config_block; /* 32 bit addr. */
    unsigned long value; /* 32 bit content */
    int i;
    int maxbit; /* how many bits are valid in the saved part */
    const struct bit_entry* p_run = p_table; /* start after the size info */
    count--; /* first is excluded from loop */
    maxbit = get_bits(p_bitfield, bitstart, p_table->bit_size);
    bitstart += p_table->bit_size;

    for (i=0; i<count; i++)
    {
        int size;
        p_run++;

        size = p_run->bit_size & 0x3F; /* mask off abused bits */
        if (bitstart + size > maxbit)
            break; /* exit if this is not valid any more in bitfield */

        value = get_bits(p_bitfield, bitstart, size);
        bitstart += size;
        if (p_run->bit_size & SIGNED)
        {   // sign extend the read value
            unsigned long mask = 0xFFFFFFFF << (size - 1);
            if (value & mask) /* true if MSB of value is set */
                value |= mask;
        }

        /* could do a memcpy, but that would be endian-dependent */
        switch(p_run->byte_size)
        {
        case 1:
            ((unsigned char*)&global_settings)[p_run->settings_offset] = 
                (unsigned char)value;
            break;
        case 2:
            ((unsigned short*)&global_settings)[p_run->settings_offset/2] = 
                (unsigned short)value;
            break;
        case 4:
            ((unsigned int*)&global_settings)[p_run->settings_offset/4] = 
                (unsigned int)value;
            break;
        default:
            DEBUGF( "illegal size!" );
            continue;
        }
    }
}


/*
 * load settings from disk or RTC RAM
 */
void settings_load(int which)
{
    DEBUGF( "reload_all_settings()\n" );

    /* load the buffer from the RTC (resets it to all-unused if the block
       is invalid) and decode the settings which are set in the block */
    if (!load_config_buffer(which)) 
    {
        /* load scalar values from RTC and HD sector, specified via table */
        if (which & SETTINGS_RTC)
        {
            load_bit_table(rtc_bits, sizeof(rtc_bits)/sizeof(rtc_bits[0]), 4*8);
        }
        if (which & SETTINGS_HD)
        {
            load_bit_table(hd_bits, sizeof(hd_bits)/sizeof(hd_bits[0]), 
                RTC_BLOCK_SIZE*8);
        }
        
        if ( global_settings.contrast < MIN_CONTRAST_SETTING )
            global_settings.contrast = lcd_default_contrast();

        strncpy(global_settings.wps_file, &config_block[0xb8], MAX_FILENAME);
        strncpy(global_settings.lang_file, &config_block[0xcc], MAX_FILENAME);
        strncpy(global_settings.font_file, &config_block[0xe0], MAX_FILENAME);
    }
}

void set_file(char* filename, char* setting, int maxlen)
{
    char* fptr = strrchr(filename,'/');
    int len;
    int extlen = 0;
    char* ptr;

    if (!fptr)
        return;

    *fptr = 0;
    fptr++;

    len = strlen(fptr);
    ptr = fptr + len;
    while (*ptr != '.') {
        extlen++;
        ptr--;
    }
        
    if (strncasecmp(ROCKBOX_DIR, filename ,strlen(ROCKBOX_DIR)) ||
        (len-extlen > maxlen))
        return;
        
    strncpy(setting, fptr, len-extlen);
    setting[len-extlen]=0;

    settings_save();
}

/* helper to sort a .cfg file entry into a global_settings member,
   as described per table. Returns the position if found, else 0. */ 
static int load_cfg_table(
    const struct bit_entry* p_table, /* the table which describes the entries */
    int count, /* number of entries in the table, including the first */
    const char* name, /* the item to be searched */
    const char* value, /* the value which got loaded for that item */
    int hint) /* position to start looking */
{
    int i = hint;

    do
    {
        if (p_table[i].cfg_name != NULL && !strcasecmp(name, p_table[i].cfg_name))
        { /* found */
            int val = 0;
            if (p_table[i].cfg_val == NULL)
            {   /* numerical value, just convert the string */
                val = atoi(value);
            }
            else
            {   /* set of string values, find the index */
                const char* item;
                const char* run;
                int len = strlen(value);
                
                item = run = p_table[i].cfg_val;
                
                while(1)
                {
                    /* count the length of the field */
                    while (*run != ',' && *run != '\0')
                        run++;

                    if (!strncasecmp(value, item, MAX(run-item, len)))
                        break; /* match, exit the search */
                    
                    if (*run == '\0') /* reached the end of the choices */
                        return i; /* return the position, but don't update */

                    val++; /* count the item up */
                    run++; /* behind the ',' */
                    item = run;
                }
            }
        
            /* could do a memcpy, but that would be endian-dependent */
            switch(p_table[i].byte_size)
            {
            case 1:
                ((unsigned char*)&global_settings)[p_table[i].settings_offset] = 
                    (unsigned char)val;
                break;
            case 2:
                ((unsigned short*)&global_settings)[p_table[i].settings_offset/2] = 
                    (unsigned short)val;
                break;
            case 4:
                ((unsigned int*)&global_settings)[p_table[i].settings_offset/4] = 
                    (unsigned int)val;
                break;
            default:
                DEBUGF( "illegal size!" );
                continue;
            }

            return i; /* return the position */
        }

        i++;
        if (i==count)
            i=1; /* wraparound */
    } while (i != hint); /* back where we started, all searched */
    
    return 0; /* indicate not found */
}


bool settings_load_config(const char* file)
{
    int fd;
    char line[128];

    fd = open(file, O_RDONLY);
    if (fd < 0)
        return false;

    while (read_line(fd, line, sizeof line) > 0)
    {
        char* name;
        char* value;
        const struct bit_entry* table[2] = { rtc_bits, hd_bits };
        const int ta_size[2] = { 
            sizeof(rtc_bits)/sizeof(rtc_bits[0]), 
            sizeof(hd_bits)/sizeof(hd_bits[0])
        };
        int last_table = 0; /* which table was used last round */
        int last_pos = 1; /* at which position did we succeed */
        int pos; /* currently returned position */

        if (!settings_parseline(line, &name, &value))
            continue;

        /* check for the string values */
        if (!strcasecmp(name, "wps")) {
            if (wps_load(value,false))
                set_file(value, global_settings.wps_file, MAX_FILENAME);
        }
        else if (!strcasecmp(name, "lang")) {
            if (!lang_load(value))
            {
                set_file(value, global_settings.lang_file, MAX_FILENAME);
                talk_init(); /* use voice of same language */
            }
        }
#ifdef HAVE_LCD_BITMAP
        else if (!strcasecmp(name, "font")) {
            if (font_load(value))
                set_file(value, global_settings.font_file, MAX_FILENAME);
        }
#endif

        /* check for scalar values, using the two tables */
        pos = load_cfg_table(table[last_table], ta_size[last_table], 
            name, value, last_pos);
        if (pos) /* success */
        {
            last_pos = pos; /* remember as a position hint for next round */
            continue;
        }

        last_table = 1-last_table; /* try other table */
        last_pos = 1; /* search from start */
        pos = load_cfg_table(table[last_table], ta_size[last_table],
            name, value, last_pos);
        if (pos) /* success */
        {
            last_pos = pos; /* remember as a position hint for next round */
            continue;
        }
    }

    close(fd);
    settings_apply();
    settings_save();
    return true;
}


/* helper to save content of global_settings into a file,
   as described per table */ 
static void save_cfg_table(const struct bit_entry* p_table, int count, int fd)
{
    long value; /* 32 bit content */
    int i;
    const struct bit_entry* p_run = p_table; /* start after the size info */
    count--; /* first is excluded from loop */

    for (i=0; i<count; i++)
    {
        p_run++;

        if (p_run->cfg_name == NULL)
            continue; /* this value is not to be saved */

        /* could do a memcpy, but that would be endian-dependent */
        switch(p_run->byte_size)
        {
        case 1:
            if (p_run->bit_size & SIGNED) /* signed? */
                value = ((char*)&global_settings)[p_run->settings_offset];
            else
                value = ((unsigned char*)&global_settings)[p_run->settings_offset];
            break;
        case 2:
            if (p_run->bit_size & SIGNED) /* signed? */
                value = ((short*)&global_settings)[p_run->settings_offset/2];
            else
                value = ((unsigned short*)&global_settings)[p_run->settings_offset/2];
            break;
        case 4:
            value = ((unsigned int*)&global_settings)[p_run->settings_offset/4];
            break;
        default:
            DEBUGF( "illegal size!" );
            continue;
        }
        
        if (p_run->cfg_val == NULL) /* write as number */
        {
            fdprintf(fd, "%s: %ld\r\n", p_run->cfg_name, value);
        }
        else /* write as item */
        {
            const char* p = p_run->cfg_val;

            fdprintf(fd, "%s: ", p_run->cfg_name);
            
            while(value >= 0)
            {
                char c = *p++; /* currently processed char */
                if (c == ',') /* separator */
                    value--;
                else if (c == '\0') /* end of string */
                    break; /* not found */
                else if (value == 0) /* the right place */
                    write(fd, &c, 1); /* char by char, this is lame, OK */
            }

            fdprintf(fd, "\r\n");
            if (p_run->cfg_val != off_on) /* explaination for non-bool */
                fdprintf(fd, "# (possible values: %s)\r\n", p_run->cfg_val);
        }
    }
}


bool settings_save_config(void)
{
    bool done = false;
    int fd, i;
    char filename[MAX_PATH];

    /* find unused filename */
    for (i=0; ; i++) {
        snprintf(filename, sizeof filename, ROCKBOX_DIR "/config%02d.cfg", i);
        fd = open(filename, O_RDONLY);
        if (fd < 0)
            break;
        close(fd);
    }

    /* allow user to modify filename */
    while (!done) {
        if (!kbd_input(filename, sizeof filename)) {
            fd = creat(filename,0);
            if (fd < 0) {
                lcd_clear_display();
                lcd_puts(0,0,str(LANG_FAILED));
                lcd_update();
                sleep(HZ);
            }
            else
                done = true;
        }
        else
            break;
    }

    /* abort if file couldn't be created */
    if (!done) {
        lcd_clear_display();
        lcd_puts(0,0,str(LANG_RESET_DONE_CANCEL));
        lcd_update();
        sleep(HZ);
        return false;
    }

    fdprintf(fd, "# .cfg file created by rockbox %s - ", appsversion);
    fdprintf(fd, "http://www.rockbox.org\r\n#\r\n");
    fdprintf(fd, "#\r\n# wps / language / font \r\n#\r\n");

    if (global_settings.wps_file[0] != 0)
        fdprintf(fd, "wps: %s/%s.wps\r\n", ROCKBOX_DIR,
                global_settings.wps_file);

    if (global_settings.lang_file[0] != 0)
        fdprintf(fd, "lang: %s/%s.lng\r\n", ROCKBOX_DIR LANG_DIR, 
                global_settings.lang_file);

#ifdef HAVE_LCD_BITMAP
    if (global_settings.font_file[0] != 0)
        fdprintf(fd, "font: %s/%s.fnt\r\n", ROCKBOX_DIR FONT_DIR,
                global_settings.font_file);
#endif

    /* here's the action: write values to file, specified via table */
    save_cfg_table(rtc_bits, sizeof(rtc_bits)/sizeof(rtc_bits[0]), fd);
    save_cfg_table(hd_bits, sizeof(hd_bits)/sizeof(hd_bits[0]), fd);

    close(fd);

    lcd_clear_display();
    lcd_puts(0,0,str(LANG_SETTINGS_SAVED1));
    lcd_puts(0,1,str(LANG_SETTINGS_SAVED2));
    lcd_update();
    sleep(HZ);
    return true;
}


/* helper to load defaults from table into global_settings members */
static void default_table(const struct bit_entry* p_table, int count)
{
    int i;

    for (i=1; i<count; i++) /* exclude the first, the size placeholder */
    {
        /* could do a memcpy, but that would be endian-dependent */
        switch(p_table[i].byte_size)
        {
        case 1:
            ((unsigned char*)&global_settings)[p_table[i].settings_offset] = 
                (unsigned char)p_table[i].default_val;
            break;
        case 2:
            ((unsigned short*)&global_settings)[p_table[i].settings_offset/2] = 
                (unsigned short)p_table[i].default_val;
            break;
        case 4:
            ((unsigned int*)&global_settings)[p_table[i].settings_offset/4] = 
                (unsigned int)p_table[i].default_val;
            break;
        default:
            DEBUGF( "illegal size!" );
            continue;
        }
    }
}


/*
 * reset all settings to their default value 
 */
void settings_reset(void) {
        
    DEBUGF( "settings_reset()\n" );

    /* read defaults from table(s) into global_settings */
    default_table(rtc_bits, sizeof(rtc_bits)/sizeof(rtc_bits[0]));
    default_table(hd_bits, sizeof(hd_bits)/sizeof(hd_bits[0]));

    /* do some special cases not covered by table */
    global_settings.volume      = sound_default(SOUND_VOLUME);
    global_settings.balance     = sound_default(SOUND_BALANCE);
    global_settings.bass        = sound_default(SOUND_BASS);
    global_settings.treble      = sound_default(SOUND_TREBLE);
    global_settings.loudness    = sound_default(SOUND_LOUDNESS);
    global_settings.avc         = sound_default(SOUND_AVC);
    global_settings.channel_config = sound_default(SOUND_CHANNELS);
    global_settings.stereo_width = sound_default(SOUND_STEREO_WIDTH);
    global_settings.mdb_strength = sound_default(SOUND_MDB_STRENGTH);
    global_settings.mdb_harmonics = sound_default(SOUND_MDB_HARMONICS);
    global_settings.mdb_center = sound_default(SOUND_MDB_CENTER);
    global_settings.mdb_shape = sound_default(SOUND_MDB_SHAPE);
    global_settings.mdb_enable = sound_default(SOUND_MDB_ENABLE);
    global_settings.superbass = sound_default(SOUND_SUPERBASS);
    global_settings.contrast    = lcd_default_contrast();
    global_settings.wps_file[0] = '\0';
    global_settings.font_file[0] = '\0';
    global_settings.lang_file[0] = '\0';

}

bool set_bool(const char* string, bool* variable )
{
    return set_bool_options(string, variable, 
        STR(LANG_SET_BOOL_YES), 
        STR(LANG_SET_BOOL_NO), 
        NULL);
}

/* wrapper to convert from int param to bool param in set_option */
static void (*boolfunction)(bool);
void bool_funcwrapper(int value)
{
    if (value)
        boolfunction(true);
    else
        boolfunction(false);
}

bool set_bool_options(const char* string, bool* variable,
                      const char* yes_str, int yes_voice,
                      const char* no_str, int no_voice,
                      void (*function)(bool))
{
    struct opt_items names[] = { {no_str, no_voice}, {yes_str, yes_voice} };
    bool result;

    boolfunction = function;
    result = set_option(string, variable, BOOL, names, 2, 
                        function ? bool_funcwrapper : NULL);
    return result;
}

bool set_int(const char* string,
             const char* unit,
             int voice_unit,
             int* variable,
             void (*function)(int),
             int step,
             int min,
             int max )
{
    bool done = false;
    int button;
    int org_value=*variable;
    int last_value = INT_MAX; /* out of range init */

#ifdef HAVE_LCD_BITMAP
    if(global_settings.statusbar)
        lcd_setmargins(0, STATUSBAR_HEIGHT);
    else
        lcd_setmargins(0, 0);
#endif

    lcd_clear_display();
    lcd_puts_scroll(0, 0, string);

    while (!done) {
        char str[32];
        snprintf(str,sizeof str,"%d %s  ", *variable, unit);
        lcd_puts(0, 1, str);
#ifdef HAVE_LCD_BITMAP
        status_draw(true);
#endif
        lcd_update();

        if (global_settings.talk_menu && *variable != last_value)
        {
            if (voice_unit < UNIT_LAST)
            {   /* use the available unit definition */
                talk_value(*variable, voice_unit, false);
            }
            else
            {   /* say the number, followed by an arbitrary voice ID */
                talk_number(*variable, false);
                talk_id(voice_unit, true);
            }
            last_value = *variable;
        }

        button = button_get_w_tmo(HZ/2);
        switch(button) {
            case SETTINGS_INC:
            case SETTINGS_INC | BUTTON_REPEAT:
                *variable += step;
                break;

            case SETTINGS_DEC:
            case SETTINGS_DEC | BUTTON_REPEAT:
                *variable -= step;
                break;

            case SETTINGS_OK:
#ifdef SETTINGS_OK2
            case SETTINGS_OK2:
#endif
                done = true;
                break;

            case SETTINGS_CANCEL:
#ifdef SETTINGS_CANCEL2
            case SETTINGS_CANCEL2:
#endif
                if (*variable != org_value) {
                    *variable=org_value;
                    lcd_stop_scroll();
                    lcd_puts(0, 0, str(LANG_MENU_SETTING_CANCEL));
                    lcd_update();
                    sleep(HZ/2);
                }
                done = true;
                break;

            default:
                if(default_event_handler(button) == SYS_USB_CONNECTED)
                    return true;
                break;
        }
        if(*variable > max )
            *variable = max;

        if(*variable < min )
            *variable = min;

        if ( function && button != BUTTON_NONE)
            function(*variable);
    }
    lcd_stop_scroll();

    return false;
}

/* NOTE: the 'type' parameter specifies the actual type of the variable
   that 'variable' points to. not the value within. Only variables with
   type 'bool' should use parameter BOOL.

   The type separation is necessary since int and bool are fundamentally
   different and bit-incompatible types and can not share the same access
   code. */

bool set_option(const char* string, void* variable, enum optiontype type,
                const struct opt_items* options, int numoptions, void (*function)(int))
{
    bool done = false;
    int button;
    int* intvar = (int*)variable;
    bool* boolvar = (bool*)variable;
    int oldval = 0;
    int index, oldindex = -1; /* remember what we said */

    if (type==INT)
        oldval=*intvar;
    else
        oldval=*boolvar;

#ifdef HAVE_LCD_BITMAP
    if(global_settings.statusbar)
        lcd_setmargins(0, STATUSBAR_HEIGHT);
    else
        lcd_setmargins(0, 0);
#endif

    lcd_clear_display();
    lcd_puts_scroll(0, 0, string);

    while ( !done ) {
        index = type==INT ? *intvar : (int)*boolvar;
        lcd_puts(0, 1, P2STR(options[index].string));
        if (global_settings.talk_menu && index != oldindex)
        {
            talk_id(options[index].voice_id, false);
            oldindex = index;
        }
#ifdef HAVE_LCD_BITMAP
        status_draw(true);
#endif
        lcd_update();

        button = button_get_w_tmo(HZ/2);
        switch (button) {
            case SETTINGS_INC:
            case SETTINGS_INC | BUTTON_REPEAT:
                if (type == INT) {
                    if ( *intvar < (numoptions-1) )
                        (*intvar)++;
                    else
                        (*intvar) -= (numoptions-1);
                }
                else
                    *boolvar = !*boolvar;
                break;

            case SETTINGS_DEC:
            case SETTINGS_DEC | BUTTON_REPEAT:
                if (type == INT) {
                    if ( *intvar > 0 )
                        (*intvar)--;
                    else
                        (*intvar) += (numoptions-1);
                }
                else
                    *boolvar = !*boolvar;
                break;

            case SETTINGS_OK:
#ifdef SETTINGS_OK2
            case SETTINGS_OK2:
#endif
                done = true;
                break;

            case SETTINGS_CANCEL:
#ifdef SETTINGS_CANCEL2
            case SETTINGS_CANCEL2:
#endif
                if (((type==INT) && (*intvar != oldval)) ||
                    ((type==BOOL) && (*boolvar != (bool)oldval))) {
                    if (type==INT)
                        *intvar=oldval;
                    else
                        *boolvar=oldval;
                    lcd_stop_scroll();
                    lcd_puts(0, 0, str(LANG_MENU_SETTING_CANCEL));
                    lcd_update();
                    sleep(HZ/2);
                }
                done = true;
                break;

            default:
                if(default_event_handler(button) == SYS_USB_CONNECTED)
                    return true;
                break;
        }

        if ( function && button != BUTTON_NONE) {
            if (type == INT)
                function(*intvar);
            else
                function(*boolvar);
        }
    }
    lcd_stop_scroll();
    return false;
}

#ifdef HAVE_RECORDING
/* This array holds the record timer interval lengths, in seconds */
static const unsigned long rec_timer_seconds[] =
{
    24L*60*60, /* OFF really means 24 hours, to avoid >2Gbyte files */
    5*60,     /* 00:05 */
    10*60,    /* 00:10 */
    15*60,    /* 00:15 */
    30*60,    /* 00:30 */
    60*60,    /* 01:00 */
    74*60,    /* 74:00 */
    80*60,    /* 80:00 */
    2*60*60,  /* 02:00 */
    4*60*60,  /* 04:00 */
    6*60*60,  /* 06:00 */
    8*60*60,  /* 08:00 */
    10L*60*60, /* 10:00 */
    12L*60*60, /* 12:00 */
    18L*60*60, /* 18:00 */
    24L*60*60  /* 24:00 */
};

unsigned int rec_timesplit_seconds(void)
{
    return rec_timer_seconds[global_settings.rec_timesplit];
}

/*
 * Time strings used for the trigger durations.
 * Keep synchronous to trigger_times in settings_apply_trigger
 */
char *trig_durations[TRIG_DURATION_COUNT] =
{
    "0s", "1s", "2s", "5s",
    "10s", "15s", "20s", "25s", "30s",
    "1min", "2min", "5min", "10min"
};

void settings_apply_trigger(void)
{
    /* Keep synchronous to trig_durations and trig_durations_conf*/
    static const long trigger_times[TRIG_DURATION_COUNT] = {
        0, HZ, 2*HZ, 5*HZ,
        10*HZ, 15*HZ, 20*HZ, 25*HZ, 30*HZ,
        60*HZ, 2*60*HZ, 5*60*HZ, 10*60*HZ
    };

    peak_meter_define_trigger(
        global_settings.rec_start_thres,
        trigger_times[global_settings.rec_start_duration],
        MIN(trigger_times[global_settings.rec_start_duration] / 2, 2*HZ),
        global_settings.rec_stop_thres,
        trigger_times[global_settings.rec_stop_postrec],
        trigger_times[global_settings.rec_stop_gap]
    );
}
#endif