summaryrefslogtreecommitdiffstats
path: root/apps/playlist_viewer.c
blob: 4328a6de1d12a4be797a5aec5572b0bf9fbb4a90 (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
/***************************************************************************
 *
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2003 Hardeep Sidhu
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
/*
 * Kevin Ferrare 2005/10/16
 * multi-screen support, rewrote a lot of code
 */
#include <string.h>
#include "playlist.h"
#include "audio.h"
#include "screens.h"
#include "settings.h"
#include "icons.h"
#include "menu.h"
#include "plugin.h"
#include "keyboard.h"
#include "filetypes.h"
#include "onplay.h"
#include "talk.h"
#include "misc.h"
#include "action.h"
#include "debug.h"
#include "backlight.h"

#include "lang.h"

#include "playlist_viewer.h"
#include "playlist_catalog.h"
#include "icon.h"
#include "list.h"
#include "splash.h"
#include "playlist_menu.h"
#include "menus/exported_menus.h"
#include "yesno.h"

/* Maximum number of tracks we can have loaded at one time */
#define MAX_PLAYLIST_ENTRIES 200

/* The number of items between the selected one and the end/start of
 * the buffer under which the buffer must reload */
#define MIN_BUFFER_MARGIN (screens[0].getnblines()+1)

/* Information about a specific track */
struct playlist_entry {
    char *name;                 /* Formatted track name                     */
    int index;                  /* Playlist index                           */
    int display_index;          /* Display index                            */
    bool queued;                /* Is track queued?                         */
    bool skipped;               /* Is track marked as bad?                  */
};

enum direction
{
    FORWARD,
    BACKWARD
};

enum pv_onplay_result {
    PV_ONPLAY_USB,
    PV_ONPLAY_USB_CLOSED,
    PV_ONPLAY_WPS_CLOSED,
    PV_ONPLAY_CLOSED,
    PV_ONPLAY_ITEM_REMOVED,
    PV_ONPLAY_CHANGED,
    PV_ONPLAY_UNCHANGED,
};

struct playlist_buffer
{
    char *name_buffer;        /* Buffer used to store track names */
    int buffer_size;          /* Size of name buffer */

    int first_index;          /* Real index of first track loaded inside
                                 the buffer */

    enum direction direction; /* Direction of the buffer (if the buffer
                                 was loaded BACKWARD, the last track in
                                 the buffer has a real index < to the
                                 real index of the the first track)*/

    struct playlist_entry tracks[MAX_PLAYLIST_ENTRIES];
    int num_loaded;           /* Number of track entries loaded in buffer */
};

/* Global playlist viewer settings */
struct playlist_viewer {
    const char *title;          /* Playlist Viewer list title                */
    struct playlist_info* playlist; /* Playlist being viewed                 */
    int num_tracks;             /* Number of tracks in playlist              */
    int *initial_selection;     /* The initially selected track              */
    int current_playing_track;  /* Index of current playing track            */
    int selected_track;         /* The selected track, relative (first is 0) */
    int moving_track;           /* The track to move, relative (first is 0)
                                   or -1 if nothing is currently being moved */
    int moving_playlist_index;  /* Playlist-relative index (as opposed to
                                   viewer-relative index) of moving track    */
    struct playlist_buffer buffer;
};

static struct playlist_viewer  viewer;

/* Used when viewing playlists on disk */
static struct playlist_info temp_playlist;
static bool temp_playlist_init = false;

static bool dirty = false;

static void playlist_buffer_init(struct playlist_buffer *pb, char *names_buffer,
                                 int names_buffer_size);
static void playlist_buffer_load_entries(struct playlist_buffer * pb, int index,
                                         enum direction direction);
static int playlist_entry_load(struct playlist_entry *entry, int index,
                               char* name_buffer, int remaining_size);

static struct playlist_entry * playlist_buffer_get_track(struct playlist_buffer *pb,
                                                         int index);

static bool playlist_viewer_init(struct playlist_viewer * viewer,
                                 const char* filename, bool reload,
                                 int *most_recent_selection);

static void format_name(char* dest, const char* src);
static void format_line(const struct playlist_entry* track, char* str,
                        int len);

static bool update_playlist(bool force);
static enum pv_onplay_result onplay_menu(int index);

static void close_playlist_viewer(void);

static void playlist_buffer_init(struct playlist_buffer *pb, char *names_buffer,
                                 int names_buffer_size)
{
    pb->name_buffer = names_buffer;
    pb->buffer_size = names_buffer_size;
    pb->first_index = 0;
    pb->num_loaded = 0;
}

/*
 * Loads the entries following 'index' in the playlist buffer
 */
static void playlist_buffer_load_entries(struct playlist_buffer *pb, int index,
                                         enum direction direction)
{
    int num_entries = viewer.num_tracks;
    char* p = pb->name_buffer;
    int remaining = pb->buffer_size;
    int i;

    pb->first_index = index;
    if (num_entries > MAX_PLAYLIST_ENTRIES)
        num_entries = MAX_PLAYLIST_ENTRIES;

    for (i = 0; i < num_entries; i++)
    {
        int len = playlist_entry_load(&(pb->tracks[i]), index, p, remaining);
        if (len < 0)
        {
            /* Out of name buffer space */
            num_entries = i;
            break;
        }

        p += len;
        remaining -= len;

        if(direction == FORWARD)
            index++;
        else
            index--;
        index += viewer.num_tracks;
        index %= viewer.num_tracks;
    }
    pb->direction = direction;
    pb->num_loaded = i;
}

/* playlist_buffer_load_entries_screen()
 *      This function is called when the currently selected item gets too close
 *      to the start or the end of the loaded part of the playlis, or when
 *      the list callback requests a playlist item that has not been loaded yet
 *
 *      reference_track is either the currently selected track, or the track that
 *      has been requested by the callback, and has not been loaded yet.
 */
static void playlist_buffer_load_entries_screen(struct playlist_buffer * pb,
                                                enum direction direction,
                                                int reference_track)
{
    if (direction == FORWARD)
    {
        int min_start = reference_track-2*screens[0].getnblines();
        while (min_start < 0)
            min_start += viewer.num_tracks;
        min_start %= viewer.num_tracks;
        playlist_buffer_load_entries(pb, min_start, FORWARD);
    }
    else
    {
        int max_start = reference_track+2*screens[0].getnblines();
        max_start %= viewer.num_tracks;
        playlist_buffer_load_entries(pb, max_start, BACKWARD);
    }
}

static int playlist_entry_load(struct playlist_entry *entry, int index,
                               char* name_buffer, int remaining_size)
{
    struct playlist_track_info info;
    int len;

    /* Playlist viewer orders songs based on display index.  We need to
       convert to real playlist index to access track */
    index = (index + playlist_get_first_index(viewer.playlist)) %
        viewer.num_tracks;
    if (playlist_get_track_info(viewer.playlist, index, &info) < 0)
        return -1;

    len = strlen(info.filename) + 1;

    if (len <= remaining_size)
    {
        strcpy(name_buffer, info.filename);

        entry->name = name_buffer;
        entry->index = info.index;
        entry->display_index = info.display_index;
        entry->queued = info.attr & PLAYLIST_ATTR_QUEUED;
        entry->skipped = info.attr & PLAYLIST_ATTR_SKIPPED;
        return len;
    }
    return -1;
}

static int playlist_buffer_get_index(struct playlist_buffer *pb, int index)
{
    int buffer_index;
    if (pb->direction == FORWARD)
    {
        if (index >= pb->first_index)
            buffer_index = index-pb->first_index;
        else /* rotation : track0 in buffer + requested track */
            buffer_index = viewer.num_tracks-pb->first_index+index;
    }
    else
    {
        if (index <= pb->first_index)
            buffer_index = pb->first_index-index;
        else /* rotation : track0 in buffer + dist from the last track
                to the requested track (num_tracks-requested track) */
            buffer_index = pb->first_index+viewer.num_tracks-index;
    }
    return buffer_index;
}

#define distance(a, b) \
    a>b? (a) - (b) : (b) - (a)
static bool playlist_buffer_needs_reload(struct playlist_buffer* pb,
                                         int track_index)
{
    if (pb->num_loaded == viewer.num_tracks)
        return false;
    int selected_index = playlist_buffer_get_index(pb, track_index);
    int first_buffer_index = playlist_buffer_get_index(pb, pb->first_index);
    int distance_beginning = distance(selected_index, first_buffer_index);
    if (distance_beginning < MIN_BUFFER_MARGIN)
        return true;

    if (pb->num_loaded - distance_beginning < MIN_BUFFER_MARGIN)
       return true;
    return false;
}

static struct playlist_entry * playlist_buffer_get_track(struct playlist_buffer *pb,
                                                         int index)
{
    int buffer_index = playlist_buffer_get_index(pb, index);
    /* Make sure that we are not returning an invalid pointer.
       In some cases, when scrolling really fast, it could happen that a reqested track
       has not been pre-loaded */
    if (buffer_index < 0) {
        playlist_buffer_load_entries_screen(&viewer.buffer,
                    pb->direction == FORWARD ? BACKWARD : FORWARD,
                    index);

    } else if (buffer_index >= pb->num_loaded) {
        playlist_buffer_load_entries_screen(&viewer.buffer,
                    pb->direction,
                    index);
    }
    buffer_index = playlist_buffer_get_index(pb, index);
    if (buffer_index < 0 || buffer_index >= pb->num_loaded) {
        /* This really shouldn't happen. If this happens, then
           the name_buffer is probably too small to store enough
           titles to fill the screen, and preload data in the short
           direction.

           If this happens then scrolling performance will probably
           be quite low, but it's better then having Data Abort errors */
        playlist_buffer_load_entries(pb, index, FORWARD);
        buffer_index = playlist_buffer_get_index(pb, index);
    }
    return &(pb->tracks[buffer_index]);
}

/* Initialize the playlist viewer. */
static bool playlist_viewer_init(struct playlist_viewer * viewer,
                                 const char* filename, bool reload,
                                 int *most_recent_selection)
{
    char* buffer;
    size_t buffer_size;
    bool is_playing = audio_status() & (AUDIO_STATUS_PLAY | AUDIO_STATUS_PAUSE);
    bool have_list = filename || is_playing;
    if (!have_list && (global_status.resume_index != -1))
    {
        /* Try to restore the list from control file */
        have_list = (playlist_resume() != -1);
    }
    if (!have_list && (playlist_amount() > 0))
    {
         /*If dynamic playlist still exists, view it anyway even
        if playback has reached the end of the playlist */
        have_list = true;
    }
    if (!have_list)
    {
        /* Nothing to view, exit */
        splash(HZ, ID2P(LANG_CATALOG_NO_PLAYLISTS));
        return false;
    }

    buffer = plugin_get_buffer(&buffer_size);
    if (!buffer)
        return false;

    if (!filename)
    {
        viewer->playlist = NULL;
        viewer->title = (char *) str(LANG_PLAYLIST);
    }
    else
    {
        /* Viewing playlist on disk */
        const char *dir, *file;
        char *temp_ptr;
        char *index_buffer = NULL;
        ssize_t index_buffer_size = 0;

        /* Initialize temp playlist
         * TODO - move this to playlist.c */
        if (!temp_playlist_init)
        {
            mutex_init(&temp_playlist.mutex);
            temp_playlist_init = true;
        }

        viewer->playlist = &temp_playlist;

        /* Separate directory from filename */
        temp_ptr = strrchr(filename+1,'/');
        if (temp_ptr)
        {
            *temp_ptr = 0;
            dir = filename;
            file = temp_ptr + 1;
        }
        else
        {
            dir = "/";
            file = filename+1;
        }
        viewer->title = file;

        if (is_playing)
        {
            /* Something is playing, try to accommodate
            *  global_settings.max_files_in_playlist entries */
            index_buffer_size = playlist_get_required_bufsz(viewer->playlist,
                                   false, global_settings.max_files_in_playlist);

            if ((unsigned)index_buffer_size >= buffer_size - MAX_PATH)
                index_buffer_size = buffer_size - (MAX_PATH + 1);

            index_buffer = buffer;
        }

        playlist_create_ex(viewer->playlist, dir, file, index_buffer,
            index_buffer_size, buffer+index_buffer_size,
            buffer_size-index_buffer_size);

        if (temp_ptr)
            *temp_ptr = '/';

        buffer += index_buffer_size;
        buffer_size -= index_buffer_size;
    }
    playlist_buffer_init(&viewer->buffer, buffer, buffer_size);

    viewer->moving_track = -1;
    viewer->moving_playlist_index = -1;
    viewer->initial_selection = most_recent_selection;

    if (!reload)
    {
        if (viewer->playlist)
            viewer->selected_track = most_recent_selection ? *most_recent_selection : 0;
        else
            viewer->selected_track = playlist_get_display_index() - 1;
    }

    if (!update_playlist(true))
        return false;
    return true;
}

/* Format trackname for display purposes */
static void format_name(char* dest, const char* src)
{
    switch (global_settings.playlist_viewer_track_display)
    {
        case 0:
        default:
        {
            /* Only display the filename */
            char* p = strrchr(src, '/');

            strcpy(dest, p+1);

            /* Remove the extension */
            strrsplt(dest, '.');

            break;
        }
        case 1:
            /* Full path */
            strcpy(dest, src);
            break;
    }
}

/* Format display line */
static void format_line(const struct playlist_entry* track, char* str,
                        int len)
{
    char name[MAX_PATH];
    char *skipped = "";

    format_name(name, track->name);

    if (track->skipped)
        skipped = "(ERR) ";

    if (global_settings.playlist_viewer_indices)
        /* Display playlist index */
        snprintf(str, len, "%d. %s%s", track->display_index, skipped, name);
    else
        snprintf(str, len, "%s%s", skipped, name);

}

/* Update playlist in case something has changed or forced */
static bool update_playlist(bool force)
{
    if (!viewer.playlist)
        playlist_get_resume_info(&viewer.current_playing_track);
    else
        viewer.current_playing_track = -1;
    int nb_tracks = playlist_amount_ex(viewer.playlist);
    force = force || nb_tracks != viewer.num_tracks;
    if (force)
    {
        /* Reload tracks */
        viewer.num_tracks = nb_tracks;
        if (viewer.num_tracks <= 0)
        {
            global_status.resume_index = -1;
            global_status.resume_offset = -1;
            global_status.resume_elapsed = -1;
            return false;
        }
        playlist_buffer_load_entries_screen(&viewer.buffer, FORWARD,
                          viewer.selected_track);
        if (viewer.buffer.num_loaded <= 0)
        {
            global_status.resume_index = -1;
            global_status.resume_offset = -1;
            global_status.resume_elapsed = -1;
            return false;
        }
    }
    return true;
}

static enum pv_onplay_result show_track_info(const struct playlist_entry *current_track)
{
    struct mp3entry id3;
    bool id3_retrieval_successful = false;

    int fd = open(current_track->name, O_RDONLY);
    if (fd >= 0)
    {
        if (get_metadata(&id3, fd, current_track->name))
            id3_retrieval_successful = true;
        close(fd);
    }

    return id3_retrieval_successful &&
            browse_id3(&id3, current_track->index + 1,
            viewer.num_tracks, NULL) ? PV_ONPLAY_USB : PV_ONPLAY_UNCHANGED;
}


#ifdef HAVE_HOTKEY
static enum pv_onplay_result open_with(const struct playlist_entry *current_track)
{
    char selected_track[MAX_PATH];
    close_playlist_viewer(); /* don't pop activity yet – relevant for plugin_load */

    strmemccpy(selected_track, current_track->name, sizeof(selected_track));

    int plugin_return = filetype_list_viewers(selected_track);
    pop_current_activity_without_refresh();

    switch (plugin_return)
    {
        case PLUGIN_USB_CONNECTED:
            return PV_ONPLAY_USB_CLOSED;
        case PLUGIN_GOTO_WPS:
            return PV_ONPLAY_WPS_CLOSED;
        default:
            return PV_ONPLAY_CLOSED;
    }
}
#endif /* HAVE_HOTKEY */

#ifdef HAVE_TAGCACHE
static enum pv_onplay_result open_pictureflow(const struct playlist_entry *current_track)
{
    char selected_track[MAX_PATH];
    close_playlist_viewer(); /* don't pop activity yet – relevant for plugin_load */

    strmemccpy(selected_track, current_track->name, sizeof(selected_track));
    int plugin_return = filetype_load_plugin((void *)"pictureflow", selected_track);
    pop_current_activity_without_refresh();

    switch (plugin_return)
    {
        case PLUGIN_USB_CONNECTED:
            return PV_ONPLAY_USB_CLOSED;
        case PLUGIN_GOTO_WPS:
            return PV_ONPLAY_WPS_CLOSED;
        default:
            return PV_ONPLAY_CLOSED;
    }
}
#endif

static enum pv_onplay_result delete_track(int current_track_index,
                                          int index, bool current_was_playing)
{
    playlist_delete(viewer.playlist, current_track_index);
    if (current_was_playing)
    {
        if (playlist_amount_ex(viewer.playlist) <= 0)
            audio_stop();
        else
        {
           /* Start playing new track except if it's the lasttrack
              track in the playlist and repeat mode is disabled */
            struct playlist_entry *current_track =
                playlist_buffer_get_track(&viewer.buffer, index);
            if (current_track->display_index != viewer.num_tracks ||
                global_settings.repeat_mode == REPEAT_ALL)
            {
                audio_play(0, 0);
                viewer.current_playing_track = -1;
            }
        }
    }
    return PV_ONPLAY_ITEM_REMOVED;
}

/* Menu of playlist commands.  Invoked via ON+PLAY on main viewer screen. */
static enum pv_onplay_result onplay_menu(int index)
{
    int result, ret = PV_ONPLAY_UNCHANGED;
    struct playlist_entry * current_track =
        playlist_buffer_get_track(&viewer.buffer, index);
    MENUITEM_STRINGLIST(menu_items, ID2P(LANG_PLAYLIST), NULL,
                        ID2P(LANG_PLAYING_NEXT), ID2P(LANG_ADD_TO_PL),
                        ID2P(LANG_REMOVE), ID2P(LANG_MOVE), ID2P(LANG_MENU_SHOW_ID3_INFO),
                        ID2P(LANG_SHUFFLE),
                        ID2P(LANG_SAVE),
                        ID2P(LANG_PLAYLISTVIEWER_SETTINGS)
#ifdef HAVE_TAGCACHE
                        ,ID2P(LANG_ONPLAY_PICTUREFLOW)
#endif
                        );

    bool current_was_playing = (current_track->index == viewer.current_playing_track);

    result = do_menu(&menu_items, NULL, NULL, false);
    if (result == MENU_ATTACHED_USB)
    {
        ret = PV_ONPLAY_USB;
    }
    else if (result >= 0)
    {
        /* Abort current move */
        viewer.moving_track = -1;
        viewer.moving_playlist_index = -1;

        switch (result)
        {
            case 0:
                /* playlist */
                onplay_show_playlist_menu(current_track->name, NULL);
                ret = PV_ONPLAY_UNCHANGED;
                break;
            case 1:
                /* add to catalog */
                onplay_show_playlist_cat_menu(current_track->name, FILE_ATTR_AUDIO, NULL);
                ret = PV_ONPLAY_UNCHANGED;
                break;
            case 2:
                ret = delete_track(current_track->index, index, current_was_playing);
                break;
            case 3:
                /* move track */
                viewer.moving_track = index;
                viewer.moving_playlist_index = current_track->index;
                ret = PV_ONPLAY_UNCHANGED;
                break;
            case 4:
                ret = show_track_info(current_track);
                break;
            case 5:
                /* shuffle */
                playlist_randomise(viewer.playlist, current_tick, false);
                ret = PV_ONPLAY_CHANGED;
                break;
            case 6:
                /* save playlist */
                save_playlist_screen(viewer.playlist);
                ret = PV_ONPLAY_UNCHANGED;
                break;
            case 7:
                /* playlist viewer settings */
                result = do_menu(&viewer_settings_menu, NULL, NULL, false);
                ret = (result == MENU_ATTACHED_USB) ? PV_ONPLAY_USB : PV_ONPLAY_UNCHANGED;
                break;
#ifdef HAVE_TAGCACHE
            case 8:
                ret = open_pictureflow(current_track);
                break;
#endif
        }
    }
    return ret;
}

/* View current playlist */
enum playlist_viewer_result playlist_viewer(void)
{
    return playlist_viewer_ex(NULL, NULL);
}

static int get_track_num(struct playlist_viewer *local_viewer,
                         int selected_item)
{
    if (local_viewer->moving_track >= 0)
    {
        if (local_viewer->selected_track == selected_item)
        {
            return local_viewer->moving_track;
        }
        else if (local_viewer->selected_track > selected_item
            && selected_item >= local_viewer->moving_track)
        {
            return selected_item+1; /* move down */
        }
        else if (local_viewer->selected_track < selected_item
            && selected_item <= local_viewer->moving_track)
        {
            return selected_item-1; /* move up */
        }
    }
    return selected_item;
}

static const char* playlist_callback_name(int selected_item,
                                          void *data,
                                          char *buffer,
                                          size_t buffer_len)
{
    struct playlist_viewer *local_viewer = (struct playlist_viewer *)data;

    int track_num = get_track_num(local_viewer, selected_item);
    struct playlist_entry *track =
        playlist_buffer_get_track(&(local_viewer->buffer), track_num);

    format_line(track, buffer, buffer_len);

    return(buffer);
}


static enum themable_icons playlist_callback_icons(int selected_item,
                                                   void *data)
{
    struct playlist_viewer *local_viewer = (struct playlist_viewer *)data;

    int track_num = get_track_num(local_viewer, selected_item);
    struct playlist_entry *track =
        playlist_buffer_get_track(&(local_viewer->buffer), track_num);

    if (track->index == local_viewer->current_playing_track)
    {
        /* Current playing track */
        return Icon_Audio;
    }
    else if (track->index == local_viewer->moving_playlist_index)
    {
        /* Track we are moving */
        return Icon_Moving;
    }
    else if (track->queued)
    {
        /* Queued track */
        return Icon_Queued;
    }
    else
        return Icon_NOICON;
}

static int playlist_callback_voice(int selected_item, void *data)
{
    struct playlist_viewer *local_viewer = (struct playlist_viewer *)data;
    struct playlist_entry *track=
        playlist_buffer_get_track(&(local_viewer->buffer),
                                  selected_item);
    (void)selected_item;
    if(global_settings.playlist_viewer_icons) {
        if (track->index == local_viewer->current_playing_track)
            talk_id(LANG_NOW_PLAYING, true);
        if (track->index == local_viewer->moving_track)
            talk_id(VOICE_TRACK_TO_MOVE, true);
        if (track->queued)
            talk_id(VOICE_QUEUED, true);
    }
    if (track->skipped)
        talk_id(VOICE_BAD_TRACK, true);
    if (global_settings.playlist_viewer_indices)
        talk_number(track->display_index, true);

    if(global_settings.playlist_viewer_track_display)
        talk_fullpath(track->name, true);
    else talk_file_or_spell(NULL, track->name, NULL, true);
    if (viewer.moving_track != -1)
        talk_ids(true,VOICE_PAUSE, VOICE_MOVING_TRACK);

    return 0;
}

static void update_lists(struct gui_synclist * playlist_lists)
{
    gui_synclist_set_voice_callback(playlist_lists,
                                    global_settings.talk_file?
                                    &playlist_callback_voice:NULL);
    gui_synclist_set_icon_callback(playlist_lists,
                  global_settings.playlist_viewer_icons?
                  &playlist_callback_icons:NULL);
    gui_synclist_set_title(playlist_lists, viewer.title, Icon_Playlist);
    gui_synclist_draw(playlist_lists);
    gui_synclist_speak_item(playlist_lists);
}

static bool update_viewer_with_changes(struct gui_synclist *playlist_lists, enum pv_onplay_result res)
{
    bool exit = false;
    if (res == PV_ONPLAY_CHANGED ||
        res == PV_ONPLAY_ITEM_REMOVED)
    {
        if (res == PV_ONPLAY_ITEM_REMOVED)
            gui_synclist_del_item(playlist_lists);
        update_playlist(true);
        if (viewer.num_tracks <= 0)
            exit = true;
        if (viewer.selected_track >= viewer.num_tracks)
            viewer.selected_track = viewer.num_tracks-1;
        dirty = true;
    }
    /* the show_icons option in the playlist viewer settings
     * menu might have changed */
    update_lists(playlist_lists);
    return exit;
}

static void prepare_lists(struct gui_synclist * playlist_lists)
{
    gui_synclist_init(playlist_lists, playlist_callback_name,
                      &viewer, false, 1, NULL);
    gui_synclist_set_voice_callback(playlist_lists,
                                    global_settings.talk_file ?
                                     &playlist_callback_voice : NULL);
    gui_synclist_set_icon_callback(playlist_lists,
                                   global_settings.playlist_viewer_icons ?
                                    &playlist_callback_icons : NULL);
    gui_synclist_set_nb_items(playlist_lists, viewer.num_tracks);
    gui_synclist_set_title(playlist_lists, viewer.title, Icon_Playlist);
    gui_synclist_select_item(playlist_lists, viewer.selected_track);
    gui_synclist_draw(playlist_lists);
    gui_synclist_speak_item(playlist_lists);
}

static bool open_playlist_viewer(const char* filename,
                                  struct gui_synclist *playlist_lists,
                                  bool reload, int *most_recent_selection)
{
    push_current_activity(ACTIVITY_PLAYLISTVIEWER);

    if (!playlist_viewer_init(&viewer, filename, reload, most_recent_selection))
        return false;

    prepare_lists(playlist_lists);

    return true;
}

/* Main viewer function.  Filename identifies playlist to be viewed.  If NULL,
   view current playlist. */
enum playlist_viewer_result playlist_viewer_ex(const char* filename,
                                               int* most_recent_selection)
{
    enum playlist_viewer_result ret = PLAYLIST_VIEWER_OK;
    bool exit = false;        /* exit viewer */
    int button;
    struct gui_synclist playlist_lists;

    if (!open_playlist_viewer(filename, &playlist_lists, false, most_recent_selection))
    {
        ret = PLAYLIST_VIEWER_CANCEL;
        goto exit;
    }

    while (!exit)
    {
        int track;

        if (global_status.resume_index != -1 && !viewer.playlist)
            playlist_get_resume_info(&track);
        else
            track = -1;

        if (track != viewer.current_playing_track ||
            playlist_amount_ex(viewer.playlist) != viewer.num_tracks)
        {
            /* Playlist has changed (new track started?) */
            if (!update_playlist(false))
                goto exit;
            /*Needed because update_playlist gives wrong value when
                                                            playing is stopped*/
            viewer.current_playing_track = track;
            gui_synclist_set_nb_items(&playlist_lists, viewer.num_tracks);

            gui_synclist_draw(&playlist_lists);
            gui_synclist_speak_item(&playlist_lists);
        }

        /* Timeout so we can determine if play status has changed */
        bool res = list_do_action(CONTEXT_TREE, HZ/2, &playlist_lists, &button);
        /* during moving, another redraw is going to be needed,
         * since viewer.selected_track is updated too late (after the first draw)
         * drawing the moving item needs it */
        viewer.selected_track=gui_synclist_get_sel_pos(&playlist_lists);
        if (res)
        {
            bool reload = playlist_buffer_needs_reload(&viewer.buffer,
                    viewer.selected_track);
            if (reload)
                playlist_buffer_load_entries_screen(&viewer.buffer,
                    button == ACTION_STD_NEXT ? FORWARD : BACKWARD,
                    viewer.selected_track);
            if (reload || viewer.moving_track >= 0)
                gui_synclist_draw(&playlist_lists);
        }
        switch (button)
        {
            case ACTION_TREE_WPS:
            case ACTION_STD_CANCEL:
            {
                if (viewer.moving_track >= 0)
                {
                    viewer.selected_track = viewer.moving_track;
                    gui_synclist_select_item(&playlist_lists, viewer.moving_track);
                    viewer.moving_track = -1;
                    viewer.moving_playlist_index = -1;
                    gui_synclist_draw(&playlist_lists);
                    gui_synclist_speak_item(&playlist_lists);
                }
                else
                {
                    exit = true;
                    ret = button == ACTION_TREE_WPS ?
                                    PLAYLIST_VIEWER_OK : PLAYLIST_VIEWER_CANCEL;
                }
                break;
            }
            case ACTION_STD_OK:
            {
                struct playlist_entry * current_track =
                            playlist_buffer_get_track(&viewer.buffer,
                                                      viewer.selected_track);

                if (viewer.moving_track >= 0)
                {
                    /* Move track */
                    int ret_val;

                    ret_val = playlist_move(viewer.playlist,
                                            viewer.moving_playlist_index,
                                            current_track->index);
                    if (ret_val < 0)
                    {
                         cond_talk_ids_fq(LANG_MOVE, LANG_FAILED);
                         splashf(HZ, (unsigned char *)"%s %s", str(LANG_MOVE),
                                                               str(LANG_FAILED));
                    }
                    update_playlist(true);
                    viewer.moving_track = -1;
                    viewer.moving_playlist_index = -1;
                    dirty = true;
                }
                else if (!viewer.playlist)
                {
                    /* play new track */
                    if (!global_settings.party_mode)
                    {
                        playlist_start(current_track->index, 0, 0);
                        update_playlist(false);
                    }
                }
                else if (!global_settings.party_mode)
                {
                    int start_index = current_track->index;
                    if (!warn_on_pl_erase())
                    {
                        gui_synclist_set_title(&playlist_lists, playlist_lists.title, playlist_lists.title_icon);
                        gui_synclist_draw(&playlist_lists);
                        break;
                    }
                    /* New playlist */
                    if (playlist_set_current(viewer.playlist) < 0)
                        goto exit;
                    if (global_settings.playlist_shuffle)
                        start_index = playlist_shuffle(current_tick, start_index);
                    playlist_start(start_index, 0, 0);

                    if (viewer.initial_selection)
                        *(viewer.initial_selection) = viewer.selected_track;

                    /* Our playlist is now the current list */
                    if (!playlist_viewer_init(&viewer, NULL, true, NULL))
                        goto exit;
                    exit = true;
                }
                gui_synclist_draw(&playlist_lists);
                gui_synclist_speak_item(&playlist_lists);

                break;
            }
            case ACTION_STD_CONTEXT:
            {
                int pv_onplay_result = onplay_menu(viewer.selected_track);

                if (pv_onplay_result == PV_ONPLAY_USB)
                {
                    ret = PLAYLIST_VIEWER_USB;
                    goto exit;
                }
                else if (pv_onplay_result == PV_ONPLAY_USB_CLOSED)
                    return PLAYLIST_VIEWER_USB;
                else if (pv_onplay_result == PV_ONPLAY_WPS_CLOSED)
                    return PLAYLIST_VIEWER_OK;
                else if (pv_onplay_result == PV_ONPLAY_CLOSED)
                {
                    if (!open_playlist_viewer(filename, &playlist_lists, true, NULL))
                    {
                        ret = PLAYLIST_VIEWER_CANCEL;
                        goto exit;
                    }
                    break;
                }
                if (update_viewer_with_changes(&playlist_lists, pv_onplay_result))
                {
                    exit = true;
                    ret = PLAYLIST_VIEWER_CANCEL;
                }
                break;
            }
            case ACTION_STD_MENU:
                ret = PLAYLIST_VIEWER_MAINMENU;
                goto exit;
#ifdef HAVE_QUICKSCREEN
            case ACTION_STD_QUICKSCREEN:
                    if (!global_settings.shortcuts_replaces_qs)
                    {
                        if (quick_screen_quick(button) ==
                            QUICKSCREEN_GOTO_SHORTCUTS_MENU) /* currently disabled */
                        {
                            /* QuickScreen defers skin updates when popping its activity
                               to switch to Shortcuts Menu, so make up for that here: */
                            FOR_NB_SCREENS(i)
                                skin_update(CUSTOM_STATUSBAR, i, SKIN_REFRESH_ALL);
                        }
                        update_playlist(true);
                        prepare_lists(&playlist_lists);
                    }
                    break;
#endif
#ifdef HAVE_HOTKEY
            case ACTION_TREE_HOTKEY:
            {
                struct playlist_entry *current_track = playlist_buffer_get_track(
                                                            &viewer.buffer,
                                                            viewer.selected_track);
                enum pv_onplay_result (*do_plugin)(const struct playlist_entry *) = NULL;
#ifdef HAVE_TAGCACHE
                if (global_settings.hotkey_tree == HOTKEY_PICTUREFLOW)
                    do_plugin = &open_pictureflow;
#endif
                if (global_settings.hotkey_tree == HOTKEY_OPEN_WITH)
                    do_plugin = &open_with;

                if (do_plugin != NULL)
                {
                    int plugin_result = do_plugin(current_track);

                    if (plugin_result == PV_ONPLAY_USB_CLOSED)
                        return PLAYLIST_VIEWER_USB;
                    else if (plugin_result == PV_ONPLAY_WPS_CLOSED)
                        return PLAYLIST_VIEWER_OK;
                    else if (!open_playlist_viewer(filename, &playlist_lists, true, NULL))
                    {
                        ret = PLAYLIST_VIEWER_CANCEL;
                        goto exit;
                    }
                }
                else if (global_settings.hotkey_tree == HOTKEY_PROPERTIES)
                {
                    if (show_track_info(current_track) == PV_ONPLAY_USB)
                    {
                        ret = PLAYLIST_VIEWER_USB;
                        goto exit;
                    }
                    update_lists(&playlist_lists);
                }
                else if (global_settings.hotkey_tree == HOTKEY_DELETE)
                {
                    if (update_viewer_with_changes(&playlist_lists,
                            delete_track(current_track->index,
                            viewer.selected_track,
                            (current_track->index == viewer.current_playing_track))))
                    {
                        ret = PLAYLIST_VIEWER_CANCEL;
                        exit = true;
                    }
                }
                else
                    onplay(current_track->name, FILE_ATTR_AUDIO, CONTEXT_STD, true);
                break;
            }
#endif /* HAVE_HOTKEY */
            default:
                if(default_event_handler(button) == SYS_USB_CONNECTED)
                {
                    ret = PLAYLIST_VIEWER_USB;
                    goto exit;
                }
                break;
        }
    }

exit:
    pop_current_activity_without_refresh();
    close_playlist_viewer();
    return ret;
}

static void close_playlist_viewer(void)
{
    talk_shutup();
    if (viewer.playlist)
    {
        if (viewer.initial_selection)
            *(viewer.initial_selection) = viewer.selected_track;

        if(dirty && yesno_pop(ID2P(LANG_SAVE_CHANGES)))
            save_playlist_screen(viewer.playlist);
        playlist_close(viewer.playlist);
    }
    dirty = false;
}

static const char* playlist_search_callback_name(int selected_item, void * data,
                                                 char *buffer, size_t buffer_len)
{
    (void)buffer_len; /* this should probably be used */
    int *found_indicies = (int*)data;
    static struct playlist_track_info track;
    playlist_get_track_info(viewer.playlist, found_indicies[selected_item], &track);
    format_name(buffer, track.filename);
    return buffer;
}

static int say_search_item(int selected_item, void *data)
{
    int *found_indicies = (int*)data;
    static struct playlist_track_info track;
    playlist_get_track_info(viewer.playlist,found_indicies[selected_item],&track);
    if(global_settings.playlist_viewer_track_display)
        talk_fullpath(track.filename, false);
    else talk_file_or_spell(NULL, track.filename, NULL, false);
    return 0;
}

bool search_playlist(void)
{
    char search_str[32] = "";
    bool ret = false, exit = false;
    int i, playlist_count;
    int found_indicies[MAX_PLAYLIST_ENTRIES];
    int found_indicies_count = 0, last_found_count = -1;
    int button;
    struct gui_synclist playlist_lists;
    struct playlist_track_info track;

    if (!playlist_viewer_init(&viewer, 0, false, NULL))
        return ret;
    if (kbd_input(search_str, sizeof(search_str), NULL) < 0)
        return ret;
    lcd_clear_display();
    playlist_count = playlist_amount_ex(viewer.playlist);
    cond_talk_ids_fq(LANG_WAIT);

    cpu_boost(true);

    for (i = 0; i < playlist_count &&
        found_indicies_count < MAX_PLAYLIST_ENTRIES; i++)
    {
        if (found_indicies_count != last_found_count)
        {
            splashf(0, str(LANG_PLAYLIST_SEARCH_MSG), found_indicies_count,
                       str(LANG_OFF_ABORT));
            last_found_count = found_indicies_count;
        }

        if (action_userabort(TIMEOUT_NOBLOCK))
            break;

        playlist_get_track_info(viewer.playlist, i, &track);

        if (strcasestr(track.filename,search_str))
            found_indicies[found_indicies_count++] = track.index;

        yield();
    }

    cpu_boost(false);

    cond_talk_ids_fq(TALK_ID(found_indicies_count, UNIT_INT),
                     LANG_PLAYLIST_SEARCH_MSG);
    if (!found_indicies_count)
    {
        return ret;
    }
    backlight_on();

    gui_synclist_init(&playlist_lists, playlist_search_callback_name,
                      found_indicies, false, 1, NULL);
    gui_synclist_set_title(&playlist_lists, str(LANG_SEARCH_RESULTS), NOICON);
    gui_synclist_set_icon_callback(&playlist_lists, NULL);
    if(global_settings.talk_file)
        gui_synclist_set_voice_callback(&playlist_lists,
                                        global_settings.talk_file?
                                        &say_search_item:NULL);
    gui_synclist_set_nb_items(&playlist_lists, found_indicies_count);
    gui_synclist_select_item(&playlist_lists, 0);
    gui_synclist_draw(&playlist_lists);
    gui_synclist_speak_item(&playlist_lists);
    while (!exit)
    {
        if (list_do_action(CONTEXT_LIST, HZ/4, &playlist_lists, &button))
            continue;
        switch (button)
        {
            case ACTION_STD_CANCEL:
                exit = true;
                break;

            case ACTION_STD_OK:
            {
                int sel = gui_synclist_get_sel_pos(&playlist_lists);
                playlist_start(found_indicies[sel], 0, 0);
                exit = 1;
            }
                break;

            default:
                if (default_event_handler(button) == SYS_USB_CONNECTED)
                {
                    ret = true;
                    exit = true;
                }
                break;
        }
    }
    talk_shutup();
    return ret;
}