summaryrefslogtreecommitdiffstats
path: root/apps/plugins/splitedit.c
blob: 9317419c23a1a3322ade1baf4589a4417f4236c7 (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 Philipp Pertermann
 *
 * 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 "plugin.h"

#ifndef SIMULATOR
#ifdef HAVE_LCD_BITMAP

/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define SPLITEDIT_QUIT BUTTON_OFF
#define SPLITEDIT_PLAY BUTTON_PLAY
#define SPLITEDIT_SAVE BUTTON_F1
#define SPLITEDIT_LOOP_MODE BUTTON_F2
#define SPLITEDIT_SCALE BUTTON_F3
#define SPLITEDIT_SPEED50 (BUTTON_ON | BUTTON_LEFT)
#define SPLITEDIT_SPEED100 (BUTTON_ON | BUTTON_PLAY)
#define SPLITEDIT_SPEED150 (BUTTON_ON | BUTTON_RIGHT)
#define SPLITEDIT_MENU_RUN BUTTON_PLAY

#elif CONFIG_KEYPAD == ONDIO_PAD
#define SPLITEDIT_QUIT BUTTON_OFF
#define SPLITEDIT_PLAY_PRE BUTTON_MENU
#define SPLITEDIT_PLAY (BUTTON_MENU | BUTTON_REL)
#define SPLITEDIT_SAVE (BUTTON_MENU | BUTTON_LEFT)
#define SPLITEDIT_LOOP_MODE (BUTTON_MENU | BUTTON_UP)
#define SPLITEDIT_SCALE (BUTTON_MENU | BUTTON_RIGHT)
#define SPLITEDIT_MENU_RUN BUTTON_RIGHT

#elif CONFIG_KEYPAD == IRIVER_H100_PAD
#define SPLITEDIT_QUIT BUTTON_OFF
#define SPLITEDIT_PLAY BUTTON_ON
#define SPLITEDIT_SAVE BUTTON_SELECT
#define SPLITEDIT_LOOP_MODE BUTTON_MODE
#define SPLITEDIT_SCALE (BUTTON_REC | BUTTON_UP)
#define SPLITEDIT_SPEED50 (BUTTON_REC | BUTTON_LEFT)
#define SPLITEDIT_SPEED100 (BUTTON_REC | BUTTON_DOWN)
#define SPLITEDIT_SPEED150 (BUTTON_REC | BUTTON_RIGHT)
#define SPLITEDIT_MENU_RUN BUTTON_RIGHT


#endif

#define BMPHEIGHT 7
#define BMPWIDTH 13
unsigned char LOOP_BMP[][13] =
{
  {0xfc,0x00,0x10,0x11,0x93,0x7f,0x13,0x11,0x7c,0x38,0x10,0x00,0x7c}, /*ALL */
  {0x81,0x03,0x7f,0x03,0x91,0x10,0x10,0x10,0x7c,0x38,0x10,0x00,0x7c}, /*FROM*/
  {0xfc,0x00,0x10,0x10,0x90,0x10,0x7c,0x38,0x11,0x03,0x7f,0x03,0x01}, /*TO  */
  {0x80,0x10,0x10,0x11,0x93,0x7f,0x13,0x11,0x10,0x7c,0x38,0x10,0x00}, /*FREE*/
};

unsigned char CUT_BMP[] =
{
  0xc1,0x63,0x63,0x36,0xb6,0x1c,0x1c,0x36,0x77,0x55,0x55,0x55,0x32,
};

unsigned char SCALE_BMP[][13] =
{
  {0x80,0x06,0x49,0x66,0xb0,0x18,0x0c,0x06,0x33,0x49,0x30,0x00,0x00}, /*lin*/
  {0x80,0x30,0x78,0x48,0xff,0x7f,0x00,0x7f,0x7f,0x48,0x78,0x30,0x00}, /*db*/
};

#define TIMEBAR_Y 9
#define TIMEBAR_HEIGHT 4

#define OSCI_X 0
#define OSCI_Y (TIMEBAR_Y + TIMEBAR_HEIGHT + 1)
#define OSCI_WIDTH LCD_WIDTH
#define OSCI_HEIGHT (LCD_HEIGHT - BMPHEIGHT - OSCI_Y - 1)

/* Indices of the menu items in the save editor, see save_editor */
#define SE_PART1_SAVE 0
#define SE_PART1_NAME 1
#define SE_PART2_SAVE 2
#define SE_PART2_NAME 3
#define SE_SAVE 4
#define SE_COUNT 5

/* the global api pointer */
static struct plugin_api* rb;

/* contains the file name of the song that is to be split */
static char path_mp3[MAX_PATH];

/* Exit code of this plugin */
static enum plugin_status splitedit_exit_code = PLUGIN_OK;

/* The range in time that the displayed aerea comprises */
static unsigned int range_start = 0;
static unsigned int range_end = 0;

/* The range in time that is being looped */
static unsigned int play_start = 0;
static unsigned int play_end = 0;

/* Point in time (pixel) at which the split mark is set */
static int split_x = OSCI_X + (OSCI_WIDTH / 2);

/* Contains the peak values */
static unsigned char osci_buffer[OSCI_WIDTH];

/* if true peak values from a previous loop are only overwritten
   if the new value is greater than the old value */
static bool osci_valid = false;

/**
 * point in time from which on the osci_buffer is invalid
 * if set to ~(unsigned int)0 the entire osci_buffer is invalid
 */
static unsigned int validation_start = ~(unsigned int)0;

/* all the visible aerea is looped */
#define LOOP_MODE_ALL  0

/* loop starts at split point, ends at right visible border */
#define LOOP_MODE_FROM 1

/* loop start at left visible border, ends at split point */
#define LOOP_MODE_TO   2

/* let the song play without looping */
#define LOOP_MODE_FREE 3

/* see LOOP_MODE_XXX constants vor valid values */
static int loop_mode = LOOP_MODE_FREE;

/* minimal allowed timespan (ms) of the visible (and looped) aerea*/
#define MIN_RANGE_SIZE 1000

/* Format time into buf.
 *
 * buf      - buffer to format to.
 * buf_size - size of buffer.
 * time     - time to format, in milliseconds.
 */
static void format_time_ms(char* buf, int buf_size, int time)
{
    rb->snprintf(buf, buf_size, "%d:%02d:%03d", time / 60000,
        time % 60000 / 1000, (time % 60000) % 1000);
}

/**
 * converts screen coordinate (pixel) to time (ms)
 */
static int xpos_to_time(int xpos)
{
    int retval = 0;
    int range = range_end - range_start;
    retval = range_start + (((xpos - OSCI_X) * range) / OSCI_WIDTH);
    return retval;
}

/**
 * Converts time (ms) to screen coordinates (pixel).
 */
static int time_to_xpos(unsigned int time)
{
    int retval = OSCI_X;

    /* clip the range */
    if (time < range_start)
    {
        retval = OSCI_X;
    }
    else
    if (time >= range_end)
    {
        retval = OSCI_X + OSCI_WIDTH;
    }

    /* do the calculation */
    else
    {
        int range = range_end - range_start;
        retval = OSCI_X + ((time - range_start) * OSCI_WIDTH) / range ;
    }
    return retval;
}

/**
 * Updates the display of the textual data only.
 */
static void update_data(void)
{
    char buf[20];
    char timebuf[10];
    int w, h;

    /* split point */
    format_time_ms(timebuf, sizeof buf, xpos_to_time(split_x));
    rb->snprintf(buf, sizeof buf, "Split at: %s", timebuf);

    rb->lcd_getstringsize(buf, &w, &h);

    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
    rb->lcd_fillrect(0, 0, LCD_WIDTH, h);
    rb->lcd_set_drawmode(DRMODE_SOLID);
    rb->lcd_puts(0, 0, buf);
    rb->lcd_update_rect(0, 0, LCD_WIDTH, h);
}

/**
 * Displays which part of the song is visible
 * in the osci.
 */
static void update_timebar(struct mp3entry *mp3)
{
    rb->scrollbar
    (
        0, TIMEBAR_Y, LCD_WIDTH, TIMEBAR_HEIGHT,
        mp3->length, range_start, range_end,
        HORIZONTAL
    );
    rb->lcd_update_rect(0, TIMEBAR_Y, LCD_WIDTH, TIMEBAR_HEIGHT);
}

/**
 * Marks the entire area of the osci buffer invalid.
 * It will be drawn with new values in the next loop.
 */
void splitedit_invalidate_osci(void)
{
    osci_valid = false;
    validation_start = ~(unsigned int)0;
}

/**
 * Returns the loop mode. See the LOOP_MODE_XXX constants above.
 */
int splitedit_get_loop_mode(void)
{
    return loop_mode;
}

/**
 * Updates the icons that display the Fn key hints.
 */
static void update_icons(void)
{
    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
    rb->lcd_fillrect(0, LCD_HEIGHT - BMPHEIGHT, LCD_WIDTH, BMPHEIGHT);
    rb->lcd_set_drawmode(DRMODE_SOLID);

    /* The CUT icon */
    rb->lcd_mono_bitmap(CUT_BMP,
        LCD_WIDTH / 3 / 2 - BMPWIDTH / 2, LCD_HEIGHT - BMPHEIGHT,
        BMPWIDTH, BMPHEIGHT);

    /* The loop mode icon */
    rb->lcd_mono_bitmap(LOOP_BMP[splitedit_get_loop_mode()],
        LCD_WIDTH/3 + LCD_WIDTH/3 / 2 - BMPWIDTH/2, LCD_HEIGHT - BMPHEIGHT,
        BMPWIDTH, BMPHEIGHT);

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
    /* The scale icon */
    rb->lcd_mono_bitmap(SCALE_BMP[rb->peak_meter_get_use_dbfs() ? 1 : 0],
        2 *LCD_WIDTH/3 + LCD_WIDTH/3 / 2 - BMPWIDTH/2, LCD_HEIGHT - BMPHEIGHT,
        BMPWIDTH, BMPHEIGHT);
#else
    {
        static int idx;
        if (idx < 0 || idx > 1) idx = 0;
        idx = 1 - idx;
        rb->lcd_mono_bitmap(SCALE_BMP[idx],
            2 *LCD_WIDTH/3 + LCD_WIDTH/3 / 2 - BMPWIDTH/2, LCD_HEIGHT - BMPHEIGHT,
            BMPWIDTH, BMPHEIGHT);
    }
#endif

    rb->lcd_update_rect(0, LCD_HEIGHT - BMPHEIGHT, LCD_WIDTH, BMPHEIGHT);
}

/**
 * Sets the loop mode. See the LOOP_MODE_XXX constants above.
 */
void splitedit_set_loop_mode(int mode)
{
    int old_loop_mode = loop_mode;
    /* range restriction */
    loop_mode = mode % (LOOP_MODE_FREE + 1);
    switch (loop_mode)
    {
        case LOOP_MODE_ALL:
            play_start = range_start;
            play_end = range_end;
            break;

        case LOOP_MODE_FROM:
            play_start = xpos_to_time(split_x);
            play_end = range_end;
            break;

        case LOOP_MODE_TO:
            play_start = range_start;
            play_end = xpos_to_time(split_x);
            break;

        case LOOP_MODE_FREE:
            /* play_start is used when the song plays beyond its end */
            play_start = range_start;
            play_end = range_end;
            break;
    }

    if (loop_mode != old_loop_mode)
    {
        update_icons();
    }
}

/**
 * Readraws the osci without clear.
 */
static void redraw_osci(void)
{
    int x;
    for (x = 0; x < OSCI_WIDTH; x++)
    {
        if (osci_buffer[x] > 0)
        {
            rb->lcd_drawline
            (
                OSCI_X + x, OSCI_Y + OSCI_HEIGHT - 1,
                OSCI_X + x, OSCI_Y + OSCI_HEIGHT - osci_buffer[x] - 1
            );
        }
    }
}

/**
 * Sets the range of time in which the user can finetune the split
 * point. The split point is the center of the time range.
 */
static void set_range_by_time(
    struct mp3entry *mp3,
    unsigned int split_time,
    unsigned int range)
{
    if (mp3 != NULL)
    {
        if (range < MIN_RANGE_SIZE)
        {
            range = MIN_RANGE_SIZE;
        }
        range_start = (split_time > range / 2) ? (split_time - range / 2) : 0;
        range_end = MIN(range_start + range, mp3->length);
        split_x = time_to_xpos(split_time);

        splitedit_invalidate_osci();

        /* this sets the play_start / play_end */
        splitedit_set_loop_mode(splitedit_get_loop_mode());

        update_data();
        update_timebar(mp3);
    }
}

/**
 * Set the split point in screen coordinates
 */
void splitedit_set_split_x(int newx)
{
    int minx = split_x - 2 > 0 ? split_x - 2: 0;

    /* remove old split point from screen, only if moved */
    if (split_x != newx)
    {
        rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
        rb->lcd_fillrect(minx, OSCI_Y, 5, 1);
        rb->lcd_fillrect(split_x-1 > 0 ? split_x - 1: 0, OSCI_Y + 1, 3, 1);
        rb->lcd_fillrect(split_x, OSCI_Y + 2, 1, OSCI_HEIGHT - 2);
        rb->lcd_set_drawmode(DRMODE_SOLID);
        rb->lcd_update_rect(minx, OSCI_Y, 5, OSCI_HEIGHT);
    }

    if (newx >= OSCI_X && newx < OSCI_X + OSCI_WIDTH)
    {
        split_x = newx;
        /* in LOOP_FROM / LOOP_TO modes play_start /play_end must be updated */
        splitedit_set_loop_mode(splitedit_get_loop_mode());

        /* display new split time  */
        update_data();
    }

    /* display new split point */
    minx = split_x - 2 > 0 ? split_x - 2: 0;
    rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
    rb->lcd_fillrect(minx, OSCI_Y, 5, 1);
    rb->lcd_fillrect(split_x - 1 > 0 ? split_x - 1: 0, OSCI_Y + 1, 3, 1);
    rb->lcd_fillrect(split_x, OSCI_Y + 2, 1, OSCI_HEIGHT - 2);
    rb->lcd_set_drawmode(DRMODE_SOLID);
    rb->lcd_update_rect(minx, OSCI_Y, 5, OSCI_HEIGHT);
}

/**
 * returns the split point in screen coordinates
 */
int splitedit_get_split_x(void)
{
    return split_x;
}

/**
 * Clears the osci area and redraws it
 */
static void update_osci(void)
{
    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
    rb->lcd_fillrect(OSCI_X, OSCI_Y, OSCI_WIDTH, OSCI_HEIGHT);
    rb->lcd_set_drawmode(DRMODE_SOLID);
    redraw_osci();
    splitedit_set_split_x(splitedit_get_split_x());
    rb->lcd_update_rect(OSCI_X, OSCI_Y, OSCI_WIDTH, OSCI_HEIGHT);
}

/**
 * Zooms the visable and loopable range by the factor
 * (counter / denominator). The split point is used as
 * center point of the new selected range.
 */
static void zoom(struct mp3entry *mp3, int counter, int denominator)
{
    unsigned char oldbuf[OSCI_WIDTH];
    int oldrange = range_end - range_start;
    int range = oldrange * counter / denominator;
    int i;
    int oldindex;
    int oldsplitx;
    int splitx;
    int split;

    /* for stretching / shrinking a second buffer is needed */
    rb->memcpy(&oldbuf, &osci_buffer, sizeof osci_buffer);

    /* recalculate the new range and split point */
    oldsplitx = split_x;
    split = xpos_to_time(split_x);

    set_range_by_time(mp3, split, range);
    range = range_end - range_start;

    splitx = time_to_xpos(split);

    /* strech / shrink the existing osci buffer */
    for (i = 0; i < OSCI_WIDTH; i++)
    {
        /* oldindex = (i + OSCI_X - splitx) * range / oldrange + oldsplitx ;*/
        oldindex = (i*range / oldrange) + oldsplitx - (splitx*range /oldrange);
        if (oldindex >= 0 && oldindex < OSCI_WIDTH)
        {
            osci_buffer[i] = oldbuf[oldindex];
        }
        else
        {
            osci_buffer[i] = 0;
        }
    }

    splitx = time_to_xpos(split);
    splitedit_set_split_x(splitx);
    splitedit_invalidate_osci();

}

static void scroll(struct mp3entry *mp3)
{
    zoom(mp3, 1, 1);
    rb->lcd_update_rect(OSCI_X, OSCI_Y, LCD_WIDTH, OSCI_HEIGHT);
    update_osci();
    update_data();
}

/**
 * Zooms in by 3/4
 */
void splitedit_zoom_in(struct mp3entry *mp3)
{
    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
    rb->lcd_fillrect(OSCI_X, OSCI_Y, OSCI_WIDTH, OSCI_HEIGHT);
    rb->lcd_set_drawmode(DRMODE_SOLID);
    zoom(mp3, 3, 4);
    rb->lcd_update_rect(OSCI_X, OSCI_Y, LCD_WIDTH, OSCI_HEIGHT);
    update_osci();
    update_data();
}

/**
 * Zooms out by 4/3
 */
void splitedit_zoom_out(struct mp3entry *mp3)
{
    rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
    rb->lcd_fillrect(OSCI_X, OSCI_Y, LCD_WIDTH, OSCI_HEIGHT);
    rb->lcd_set_drawmode(DRMODE_SOLID);
    zoom(mp3, 4, 3);
    rb->lcd_update_rect(OSCI_X, OSCI_Y, LCD_WIDTH, OSCI_HEIGHT);
    update_osci();
    update_data();
}

/**
 * Append part_no to the file name.
 */
static void generateFileName(char* file_name, int part_no)
{
    if (rb->strlen(file_name) <MAX_PATH)
    {
        int len = rb->strlen(file_name);
        int ext_len = rb->strlen(".mp3");
        if (rb->strcasecmp(
            &file_name[len - ext_len],
            ".mp3") == 0)
        {
            int i = 0;
            /* shift the extension one position to the right*/
            for (i = len; i > len - ext_len; i--)
            {
                file_name[i] = file_name[i - 1];
            }
            file_name[len - ext_len] = '0' + part_no;
        }
        else
        {
            rb->splash(0, true, "wrong extension");
            rb->button_get(true);
            rb->button_get(true);
        }
    }
    else
    {
        rb->splash(0, true, "name too long");
        rb->button_get(true);
        rb->button_get(true);

    }

}

/**
 * Copy bytes from src to dest while displaying a progressbar.
 * The files must be already open.
 */
static void copy_file(
    int dest,
    int src,
    unsigned int bytes,
    int prg_y,
    int prg_h)
{
    unsigned char *buffer;
    unsigned int i = 0;
    ssize_t bytes_read = 1; /* ensure the for loop is executed */
    unsigned int buffer_size;
    buffer = rb->plugin_get_buffer(&buffer_size);

    for (i = 0; i < bytes && bytes_read > 0; i += bytes_read)
    {
        ssize_t bytes_written;
        unsigned int bytes_to_read =
            bytes - i > buffer_size ? buffer_size : bytes - i;
        bytes_read = rb->read(src, buffer, bytes_to_read);
        bytes_written = rb->write(dest, buffer, bytes_read);

        rb->scrollbar(0, prg_y, LCD_WIDTH, prg_h, bytes, 0, i, HORIZONTAL);
        rb->lcd_update_rect(0, prg_y, LCD_WIDTH, prg_h);
    }
}

/**
 * Save the files, if the file_name is not NULL
 */
static int save(
    struct mp3entry *mp3,
    char *file_name1,
    char *file_name2,
    int splittime)
{
    int file1, file2, src_file;
    unsigned int end = 0;
    int retval = 0;

    /* Verify that file 1 doesn't exit yet */
    if (file_name1 != NULL)
    {
        file1 = rb->open(file_name1, O_RDONLY);
        if (file1 >= 0)
        {
            rb->close(file1);
            rb->splash(0, true, "File 1 exists. Please rename.");
            rb->button_get(true);
            rb->button_get(true);
            return -1;
        }
    }

    /* Verify that file 2 doesn't exit yet */
    if (file_name2 != NULL)
    {
        file2 = rb->open(file_name2, O_RDONLY);
        if (file2 >= 0)
        {
            rb->close(file2);
            rb->splash(0, true, "File 2 exists. Please rename.");
            rb->button_get(true);
            rb->button_get(true);
            return -2;
        }
    }

    /* find the file position of the split point */
    rb->audio_pause();
    rb->audio_ff_rewind(splittime);
    rb->yield();
    rb->yield();
    end = rb->audio_get_file_pos();

    /* open the source file */
    src_file = rb->open(mp3->path, O_RDONLY);
    if (src_file >= 0)
    {
        int close_stat = 0;
        int x, y;
        long offset;
        unsigned long last_header = rb->mpeg_get_last_header();

        rb->lcd_getstringsize("M", &x, &y);

        /* Find the next frame boundary */
        rb->lseek(src_file, end, SEEK_SET);
        rb->find_next_frame(src_file, &offset, 8000, last_header);
        rb->lseek(src_file, 0, SEEK_SET);
        end += offset;
        
        /* write the file 1 */
        if (file_name1 != NULL)
        {
            file1 = rb->open (file_name1, O_WRONLY | O_CREAT);
            if (file1 >= 0)
            {
                copy_file(file1, src_file, end, y*2 + 1, y -1);
                close_stat = rb->close(file1);

                if (close_stat != 0)
                {
                    rb->splash(0, true,
                        "failed closing file1: error %d", close_stat);
                    rb->button_get(true);
                    rb->button_get(true);
                }
            }
            else
            {
                rb->splash(0, true,
                    "Can't write File1: error %d", file1);
                rb->button_get(true);
                rb->button_get(true);
                retval = -1;
            }
        }
        /* if file1 hasn't been written we're not at the split point yet */
        else
        {
            if (rb->lseek(src_file, end, SEEK_SET) < (off_t)end)
            {
                rb->splash(0, true,
                    "Src file to short: error %d", src_file);
                rb->button_get(true);
                rb->button_get(true);
            }
        }

        if (file_name2 != NULL)
        {
            /* write file 2 */
            file2 = rb->open (file_name2, O_WRONLY | O_CREAT);
            if (file2 >= 0)
            {
                end = mp3->filesize - end;
                copy_file(file2, src_file, end, y * 5 + 1, y -1);
                close_stat = rb->close(file2);

                if (close_stat != 0)
                {
                    rb->splash(0, true,
                        "failed: closing file2: error %d", close_stat);
                    rb->button_get(true);
                    rb->button_get(true);
                }
            }
            else
            {
                rb->splash(0, true,
                    "Can't write File2: error %d", file2);
                rb->button_get(true);
                rb->button_get(true);
                retval = -2;
            }
        }

        close_stat = rb->close(src_file);
        if (close_stat != 0)
        {
            rb->splash(0, true,
                "failed: closing src: error %d", close_stat);
            rb->button_get(true);
            rb->button_get(true);
        }
    }
    else
    {
        rb->splash(0, true, "Source file not found");
        rb->button_get(true);
        rb->button_get(true);
        retval = -3;
    }

    rb->audio_resume();

    return retval;
}

/**
 * Let the user choose which file to save with which name
 */
static void save_editor(struct mp3entry *mp3, int splittime)
{
    bool exit_request = false;
    int choice = 0;
    int button = BUTTON_NONE;
    char part1_name [MAX_PATH];
    char part2_name [MAX_PATH];
    bool part1_save = true;
    bool part2_save = true;

    /* file name for left part */
    rb->strncpy(part1_name, mp3->path, MAX_PATH);
    generateFileName(part1_name, 1);

    /* file name for right part */
    rb->strncpy(part2_name, mp3->path, MAX_PATH);
    generateFileName(part2_name, 2);

    while (!exit_request)
    {
        int pos;
        rb->lcd_clear_display();

        /* Save file1? */
        rb->lcd_puts_style(0, 0, "Save part 1?", choice == SE_PART1_SAVE);
        rb->lcd_puts(13, 0, part1_save?"yes":"no");

        /* trim to display the filename without path */
        for (pos = rb->strlen(part1_name); pos > 0; pos--)
        {
            if (part1_name[pos] == '/')
                break;
        }
        pos++;

        /* File name 1 */
        rb->lcd_puts_scroll_style(0, 1,
            &part1_name[pos], choice == SE_PART1_NAME);

        /* Save file2? */
        rb->lcd_puts_style(0, 3, "Save part 2?", choice == SE_PART2_SAVE);
        rb->lcd_puts(13, 3, part2_save?"yes":"no");

        /* trim to display the filename without path */
        for (pos = rb->strlen(part2_name); pos > 0; pos --)
        {
            if (part2_name[pos] == '/')
                break;
        }
        pos++;

        /* File name 2 */
        rb->lcd_puts_scroll_style(0, 4,
            &part2_name[pos], choice == SE_PART2_NAME);

        /* Save */
        rb->lcd_puts_style(0, 6, "Save", choice == SE_SAVE);

        rb->lcd_update();


        button = rb->button_get(true);
        switch (button)
        {
        case BUTTON_UP:
            choice = (choice + SE_COUNT - 1) % SE_COUNT;
            break;

        case BUTTON_DOWN:
            choice = (choice + 1) % SE_COUNT;
            break;

        case SPLITEDIT_MENU_RUN:
            switch (choice)
            {
            int saved;

            case SE_PART1_SAVE:
                part1_save = !part1_save;
                break;

            case SE_PART1_NAME:
                rb->kbd_input(part1_name, MAX_PATH);
                break;

            case SE_PART2_SAVE:
                part2_save = !part2_save;
                break;

            case SE_PART2_NAME:
                rb->kbd_input(part2_name, MAX_PATH);
                break;

            case SE_SAVE:
                rb->lcd_stop_scroll();
                rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
                rb->lcd_fillrect(0, 6*8, LCD_WIDTH, LCD_HEIGHT);
                rb->lcd_set_drawmode(DRMODE_SOLID);
                saved = save
                (
                    mp3,
                    part1_save?part1_name:NULL,
                    part2_save?part2_name:NULL,
                    splittime
                );

                /* if something failed the user may go on choosing */
                if (saved >= 0)
                {
                    exit_request = true;
                }
                break;
            }
            break;

        case SPLITEDIT_QUIT:
            exit_request = true;
            break;

        default:
            if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
            {
                splitedit_exit_code = PLUGIN_USB_CONNECTED;
                exit_request = true;
            }
            break;
        }
    }
}

/**
 * The main loop of the editor
 */
unsigned long splitedit_editor(struct mp3entry * mp3_to_split,
                          unsigned int split_time,
                          unsigned int range)
{
    int button = BUTTON_NONE;
    int lastbutton = BUTTON_NONE;
    struct mp3entry *mp3 = mp3_to_split;
    unsigned int last_elapsed = 0;
    int lastx = OSCI_X + (OSCI_WIDTH / 2);
    int retval = -1;

    if (mp3 != NULL)
    {
        /*unsigned short scheme = SCHEME_SPLIT_EDITOR;*/
        bool exit_request = false;
        set_range_by_time(mp3, split_time, range);
        splitedit_set_loop_mode(LOOP_MODE_ALL);
        update_icons();

        /*while (scheme != SCHEME_RETURN) {*/
        while (!exit_request)
        {
            unsigned int elapsed ;
            int x ;

            /* get position */
            elapsed = mp3->elapsed;
            x = time_to_xpos(elapsed);

            /* are we still in the zoomed range? */
            if (elapsed > play_start && elapsed < play_end)
            {
                /* read volume info */
                unsigned short volume;
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
                volume = rb->mas_codec_readreg(0x0c);
                volume += rb->mas_codec_readreg(0x0d);
                volume = volume / 2;
                volume = rb->peak_meter_scale_value(volume, OSCI_HEIGHT);
#else
                volume = OSCI_HEIGHT / 2;
#endif

                /* update osci_buffer */
                if (osci_valid || lastx == x)
                {
                    int index = x - OSCI_X;
                    osci_buffer[index] = MAX(osci_buffer[index], volume);
                }
                else
                {
                    int i;
                    osci_buffer[x - OSCI_X] = volume;
                    for (i = lastx + 1; i < x; i++)
                    {
                        osci_buffer[i - OSCI_X] = 0;
                    }
                }

                /* make room */
                rb->lcd_set_drawmode(DRMODE_SOLID|DRMODE_INVERSEVID);
                rb->lcd_fillrect(lastx + 1, OSCI_Y, x - lastx, OSCI_HEIGHT);
                rb->lcd_set_drawmode(DRMODE_SOLID);
                /* draw a value */
                if (osci_buffer[x - OSCI_X] > 0)
                {
                    int i;
                    for (i = lastx +1; i <= x; i++)
                    {
                        rb->lcd_drawline
                            (
                            i, OSCI_Y + OSCI_HEIGHT - 1,
                            i, OSCI_Y + OSCI_HEIGHT - osci_buffer[i - OSCI_X]-1
                            );
                    }
                }

                /* mark the current position */
                if (lastx != x)
                {
                    rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
                    rb->lcd_fillrect(lastx, OSCI_Y, 1, OSCI_HEIGHT);
                    rb->lcd_fillrect(x, OSCI_Y, 1, OSCI_HEIGHT);
                    rb->lcd_set_drawmode(DRMODE_SOLID);
                }

                /* mark the split point */
                if ((x > split_x - 2) && (lastx < split_x + 3))
                {
                    if ((lastx < split_x) && (x >= split_x))
                    {
                        rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
                        rb->lcd_fillrect
                        (
                            split_x, OSCI_Y + 2,
                            1, OSCI_HEIGHT - 2
                        );
                        rb->lcd_set_drawmode(DRMODE_SOLID);
                    }
                    rb->lcd_drawline(split_x -2, OSCI_Y, split_x + 2, OSCI_Y);
                    rb->lcd_drawline(split_x-1, OSCI_Y+1, split_x +1,OSCI_Y+1);
                }

                /* make visible */
                if (lastx <= x)
                {
                    rb->lcd_update_rect(lastx, OSCI_Y, x-lastx+1, OSCI_HEIGHT);
                }
                else
                {
                    rb->lcd_update_rect
                    (
                        lastx, OSCI_Y,
                        OSCI_X + OSCI_WIDTH - lastx, OSCI_HEIGHT
                    );
                    rb->lcd_update_rect(0, OSCI_Y, x + 1, OSCI_HEIGHT);
                }

                lastx = x;
            }

            /* we're not in the zoom range -> rewind */
            else
            {
                if (elapsed >= play_end)
                {
                    switch (splitedit_get_loop_mode())
                    {
                    unsigned int range_width;

                    case LOOP_MODE_ALL:
                    case LOOP_MODE_TO:
                        rb->audio_pause();
                        rb->audio_ff_rewind(range_start);
#ifdef HAVE_MMC
/* MMC is slow - wait some time to allow track reload to finish */
                        rb->sleep(HZ/20);
                        if (mp3->elapsed > play_end) /* reload in progress */
                            rb->splash(10*HZ, true, "Wait - reloading");
#endif
                        rb->audio_resume();
                        break;

                    case LOOP_MODE_FROM:
                        rb->audio_pause();
                        rb->audio_ff_rewind(xpos_to_time(split_x));
#ifdef HAVE_MMC
/* MMC is slow - wait some time to allow track reload to finish */
                        rb->sleep(HZ/20);
                        if (mp3->elapsed > play_end) /* reload in progress */
                            rb->splash(10*HZ, true, "Wait - reloading");
#endif
                        rb->audio_resume();
                        break;

                    case LOOP_MODE_FREE:
                        range_width = range_end - range_start;
                        set_range_by_time(mp3,
                            range_end + range_width / 2, range_width);

                        /* play_end und play_start anpassen */
                        splitedit_set_loop_mode(LOOP_MODE_FREE);
                        rb->memset(osci_buffer, 0, sizeof osci_buffer);
                        update_osci();
                        rb->lcd_update();
                        break;
                    }
                }
            }

            button = rb->button_get(false);
            rb->yield();

            /* here the evaluation of the key scheme starts.
            All functions the user triggers are called from
            within execute_scheme */
            /* key_scheme_execute(button, &scheme); */
            switch (button)
            {
            case SPLITEDIT_PLAY:
#ifdef SPLITEDIT_PLAY_PRE
                if (lastbutton != SPLITEDIT_PLAY_PRE)
                    break;
#endif
                rb->audio_pause();
                rb->audio_ff_rewind(xpos_to_time(split_x));
                rb->audio_resume();
                break;

            case BUTTON_UP:
                splitedit_zoom_in(mp3);
                lastx = time_to_xpos(mp3->elapsed);
                break;

            case BUTTON_DOWN:
                splitedit_zoom_out(mp3);
                lastx = time_to_xpos(mp3->elapsed);
                break;

#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
#ifdef SPLITEDIT_SPEED100
            case SPLITEDIT_SPEED150:
                rb->sound_set_pitch(1500);
                splitedit_invalidate_osci();
                break;

            case SPLITEDIT_SPEED100:
                rb->sound_set_pitch(1000);
                splitedit_invalidate_osci();
                break;

            case SPLITEDIT_SPEED50:
                rb->sound_set_pitch(500);
                splitedit_invalidate_osci();
                break;
#endif
#endif

            case BUTTON_LEFT:
            case BUTTON_LEFT | BUTTON_REPEAT:
                if (splitedit_get_split_x() > OSCI_X + 2)
                {
                    splitedit_set_split_x(splitedit_get_split_x() - 1);
                }
                else
                {
                    scroll(mp3);
                    lastx = time_to_xpos(mp3->elapsed);
                }
                break;

            case BUTTON_RIGHT:
            case BUTTON_RIGHT | BUTTON_REPEAT:
                if (splitedit_get_split_x() < OSCI_X + OSCI_WIDTH-3)
                {
                    splitedit_set_split_x(splitedit_get_split_x() + 1);
                }
                else
                {
                    scroll(mp3);
                    lastx = time_to_xpos(mp3->elapsed);
                }
                break;

            case SPLITEDIT_SAVE:
                save_editor(mp3, xpos_to_time(split_x));
                rb->lcd_clear_display();
                update_osci();
                update_timebar(mp3);
                update_icons();
                break;

            case SPLITEDIT_LOOP_MODE:
                splitedit_set_loop_mode(splitedit_get_loop_mode() + 1);
                update_icons();
                break;

            case SPLITEDIT_SCALE:
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
                rb->peak_meter_set_use_dbfs(!rb->peak_meter_get_use_dbfs());
#endif
                splitedit_invalidate_osci();
                update_icons();
                break;

            case SPLITEDIT_QUIT:
                exit_request = true;
                break;

            default:
                if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
                {
                    splitedit_exit_code = PLUGIN_USB_CONNECTED;
                    exit_request = true;
                }
                break;

            }
            if (button != BUTTON_NONE)
                lastbutton = button;

            if (validation_start == ~(unsigned int)0)
            {
                if (elapsed < range_end && elapsed > range_start)
                {
                    validation_start = elapsed;
                }
                else
                {
                    int endx = time_to_xpos(range_end);
                    validation_start = xpos_to_time(endx - 2);
                }
                last_elapsed = elapsed + 1;
            }
            else
            {
                if ((last_elapsed <= validation_start) &&
                    (elapsed > validation_start))
                {
                    osci_valid = true;
                }

                last_elapsed = elapsed;
            }
            update_data();

            if (mp3 != rb->audio_current_track())
            {
                struct mp3entry *new_mp3 = rb->audio_current_track();
                if (rb->strncasecmp(path_mp3, new_mp3->path,
                                    sizeof (path_mp3)))
                {
                    rb->splash(0, true,"Abort due to file change");
                    rb->button_get(true);
                    rb->button_get(true);
                    exit_request = true;
                }
                else
                {
                    mp3 = new_mp3;
                    rb->audio_pause();
                    rb->audio_flush_and_reload_tracks();
                    rb->audio_ff_rewind(range_start);
                    rb->audio_resume();
                }
            }
        }
#if (CONFIG_HWCODEC == MAS3587F) || (CONFIG_HWCODEC == MAS3539F)
#ifdef SPLITEDIT_SPEED100
        rb->sound_set_pitch(1000); /* make sure to reset pitch */
#endif
#endif

    }
    return retval;
}

enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
{
    struct mp3entry* mp3;

    (void)parameter;
    rb = api;
    rb->lcd_clear_display();
    rb->lcd_update();
    mp3 = rb->audio_current_track();
    if (mp3 != NULL)
    {
        if (rb->audio_status() & AUDIO_STATUS_PAUSE)
        {
            rb->audio_resume();
        }
        splitedit_editor(mp3, mp3->elapsed, MIN_RANGE_SIZE * 8);
    }
    else
    {
        rb->splash(0, true, "Play or pause a mp3 file first.");
        rb->button_get(true);
        rb->button_get(true);
    }
    return splitedit_exit_code;
}
#endif
#endif