summaryrefslogtreecommitdiffstats
path: root/apps/plugins/pitch_screen.c
blob: 4af34fed3b8c1d139c45dce56eae3be2e1380447 (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2002 Björn Stenberg
 *
 *
 * 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.
 *
 ****************************************************************************/
#include "plugin.h"
#include "lib/icon_helper.h"
#include "lib/arg_helper.h"

#define ICON_BORDER 12 /* icons are currently 7x8, so add ~2 pixels  */
                       /*   on both sides when drawing */

#define PITCH_MAX         (200 * PITCH_SPEED_PRECISION)
#define PITCH_MIN         (50 * PITCH_SPEED_PRECISION)
#define PITCH_SMALL_DELTA (PITCH_SPEED_PRECISION / 10)      /* .1% */
#define PITCH_BIG_DELTA   (PITCH_SPEED_PRECISION)           /*  1% */
#define PITCH_NUDGE_DELTA (2 * PITCH_SPEED_PRECISION)       /*  2% */

#define SPEED_SMALL_DELTA (PITCH_SPEED_PRECISION / 10)      /* .1% */
#define SPEED_BIG_DELTA   (PITCH_SPEED_PRECISION)           /*  1% */

#define SEMITONE_SMALL_DELTA (PITCH_SPEED_PRECISION / 10)  /* 10 cents   */
#define SEMITONE_BIG_DELTA   PITCH_SPEED_PRECISION         /* 1 semitone */

#define PVAR_VERBOSE 0x01
#define PVAR_GUI     0x02
struct pvars
{
    int32_t speed;
    int32_t pitch;
    int32_t stretch;
    int32_t flags;
};
static struct pvars pitch_vars;

enum
{
    PITCH_TOP = 0,
    PITCH_MID,
    PITCH_BOTTOM,
    PITCH_ITEM_COUNT,
};

/* This is a table of semitone percentage values of the appropriate
   precision (based on PITCH_SPEED_PRECISION).  Note that these are
   all constant expressions, which will be evaluated at compile time,
   so no need to worry about how complex the expressions look.
   That's just to get the precision right.

   I calculated these values, starting from 50, as

   x(n) = 50 * 2^(n/12)

   All that math in each entry simply converts the float constant
   to an integer equal to PITCH_SPEED_PRECISION times the float value,
   with as little precision loss as possible (i.e. correctly rounding
   the last digit).
*/
#define TO_INT_WITH_PRECISION(x) \
    ( (unsigned short)(((x) * PITCH_SPEED_PRECISION * 10 + 5) / 10) )

static const unsigned short semitone_table[] =
{
    TO_INT_WITH_PRECISION(50.00000000), /* Octave lower */
    TO_INT_WITH_PRECISION(52.97315472),
    TO_INT_WITH_PRECISION(56.12310242),
    TO_INT_WITH_PRECISION(59.46035575),
    TO_INT_WITH_PRECISION(62.99605249),
    TO_INT_WITH_PRECISION(66.74199271),
    TO_INT_WITH_PRECISION(70.71067812),
    TO_INT_WITH_PRECISION(74.91535384),
    TO_INT_WITH_PRECISION(79.37005260),
    TO_INT_WITH_PRECISION(84.08964153),
    TO_INT_WITH_PRECISION(89.08987181),
    TO_INT_WITH_PRECISION(94.38743127),
    TO_INT_WITH_PRECISION(100.0000000), /* Normal sound */
    TO_INT_WITH_PRECISION(105.9463094),
    TO_INT_WITH_PRECISION(112.2462048),
    TO_INT_WITH_PRECISION(118.9207115),
    TO_INT_WITH_PRECISION(125.9921049),
    TO_INT_WITH_PRECISION(133.4839854),
    TO_INT_WITH_PRECISION(141.4213562),
    TO_INT_WITH_PRECISION(149.8307077),
    TO_INT_WITH_PRECISION(158.7401052),
    TO_INT_WITH_PRECISION(168.1792831),
    TO_INT_WITH_PRECISION(178.1797436),
    TO_INT_WITH_PRECISION(188.7748625),
    TO_INT_WITH_PRECISION(200.0000000)  /* Octave higher */
};

#define NUM_SEMITONES   ((int)(sizeof(semitone_table)/sizeof(semitone_table[0])))
#define SEMITONE_END    (NUM_SEMITONES/2)
#define SEMITONE_START  (-SEMITONE_END)

/* A table of values for approximating the cent curve with
   linear interpolation.  Multipy the next lowest semitone
   by this much to find the corresponding cent percentage.

   These values were calculated as
   x(n) = 100 * 2^(n * 20/1200)
*/

static const unsigned short cent_interp[] =
{
    TO_INT_WITH_PRECISION(100.0000000),
    TO_INT_WITH_PRECISION(101.1619440),
    TO_INT_WITH_PRECISION(102.3373892),
    TO_INT_WITH_PRECISION(103.5264924),
    TO_INT_WITH_PRECISION(104.7294123),
    /* this one's the next semitone but we have it here for convenience */
    TO_INT_WITH_PRECISION(105.9463094),
};

int viewport_get_nb_lines(const struct viewport *vp)
{
    return vp->height/rb->font_get(vp->font)->height;
}
#if 0 /* replaced with cbmp_get_icon(CBMP_Mono_7x8, Icon_ABCD, &w, &h) */
enum icons_7x8 {
    Icon_Plug,
    Icon_USBPlug,
    Icon_Mute,
    Icon_Play,
    Icon_Stop,
    Icon_Pause,
    Icon_FastForward,
    Icon_FastBackward,
    Icon_Record,
    Icon_RecPause,
    Icon_Radio,
    Icon_Radio_Mute,
    Icon_Repeat,
    Icon_RepeatOne,
    Icon_Shuffle,
    Icon_DownArrow,
    Icon_UpArrow,
    Icon_RepeatAB,
    Icon7x8Last
};

const unsigned char bitmap_icons_7x8[][7] =
{
    {0x08,0x1c,0x3e,0x3e,0x3e,0x14,0x14}, /* Power plug */
    {0x1c,0x14,0x3e,0x2a,0x22,0x1c,0x08}, /* USB plug */
    {0x01,0x1e,0x1c,0x3e,0x7f,0x20,0x40}, /* Speaker mute */
    {0x00,0x7f,0x7f,0x3e,0x1c,0x08,0x00}, /* Play */
    {0x7f,0x7f,0x7f,0x7f,0x7f,0x7f,0x7f}, /* Stop */
    {0x00,0x7f,0x7f,0x00,0x7f,0x7f,0x00}, /* Pause */
    {0x7f,0x3e,0x1c,0x7f,0x3e,0x1c,0x08}, /* Fast forward */
    {0x08,0x1c,0x3e,0x7f,0x1c,0x3e,0x7f}, /* Fast backward */
    {0x1c,0x3e,0x7f,0x7f,0x7f,0x3e,0x1c}, /* Record */
    {0x1c,0x3e,0x7f,0x00,0x7f,0x3e,0x1c}, /* Record pause */
    {0x40,0xa0,0xa0,0xa0,0x7f,0x02,0x02}, /* Radio on */
    {0x42,0xa4,0xa8,0xb0,0x7f,0x22,0x42}, /* Radio mute */
    {0x44,0x4e,0x5f,0x44,0x44,0x44,0x38}, /* Repeat playmode */
    {0x44,0x4e,0x5f,0x44,0x38,0x02,0x7f}, /* Repeat-one playmode */
    {0x3e,0x41,0x51,0x41,0x45,0x41,0x3e}, /* Shuffle playmode (dice) */
    {0x04,0x0c,0x1c,0x3c,0x1c,0x0c,0x04}, /* Down-arrow */
    {0x20,0x30,0x38,0x3c,0x38,0x30,0x20}, /* Up-arrow */
    {0x7f,0x04,0x4e,0x5f,0x44,0x38,0x7f}  /* Repeat-AB playmode */
};
#endif

/* Number of cents between entries in the cent_interp table */
#define CENT_INTERP_INTERVAL 20
#define CENT_INTERP_NUM      ((int)(sizeof(cent_interp)/sizeof(cent_interp[0])))

/* This stores whether the pitch and speed are at their own limits */
/* or that of the timestretching algorithm                         */
static bool at_limit = false;

/*
 *
 * The pitchscreen is divided into 3 viewports (each row is a viewport)
 * Then each viewport is again divided into 3 colums, each showsing some infos
 * Additionally, on touchscreen, each cell represents a button
 *
 * Below a sketch describing what each cell will show (what's drawn on it)
 * --------------------------
 * |      |        |        | <-- pitch up in the middle (text and button)
 * |      |        |        | <-- arrows for mode toggling on the sides for touchscreen
 * |------------------------|
 * |      |        |        | <-- semitone/speed up/down on the sides
 * |      |        |        | <-- reset pitch&speed in the middle
 * |------------------------|
 * |      |        |        | <-- pitch down in the middle
 * |      |        |        | <-- Two "OK" for exit on the sides for touchscreen
 * |------------------------|
 *
 *
 */

static void speak_pitch_mode(bool enqueue)
{
    bool timestretch_mode = rb->global_settings->pitch_mode_timestretch && rb->dsp_timestretch_available();
    if (timestretch_mode)
        rb->talk_id(VOICE_PITCH_TIMESTRETCH_MODE, enqueue);
    if (rb->global_settings->pitch_mode_semitone)
        rb->talk_id(VOICE_PITCH_SEMITONE_MODE, timestretch_mode ? true : enqueue);
    else
        rb->talk_id(VOICE_PITCH_ABSOLUTE_MODE, timestretch_mode ? true : enqueue);
    return;
}

/*
 * Fixes the viewports so they represent the 3 rows, and adds a little margin
 * on all sides for the icons (which are drawn outside of the grid
 *
 * The modified viewports need to be passed to the touchscreen handling function
 **/
static void pitchscreen_fix_viewports(struct viewport *parent,
        struct viewport pitch_viewports[PITCH_ITEM_COUNT])
{
    int i, font_height;
    font_height = rb->font_get(parent->font)->height;
    for (i = 0; i < PITCH_ITEM_COUNT; i++)
    {
        pitch_viewports[i] = *parent;
        pitch_viewports[i].height = parent->height / PITCH_ITEM_COUNT;
        pitch_viewports[i].x += ICON_BORDER;
        pitch_viewports[i].width -= 2*ICON_BORDER;
    }
    pitch_viewports[PITCH_TOP].y      += ICON_BORDER;
    pitch_viewports[PITCH_TOP].height -= ICON_BORDER;

    if(pitch_viewports[PITCH_MID].height < font_height * 2)
        pitch_viewports[PITCH_MID].height = font_height * 2;

    pitch_viewports[PITCH_MID].y = pitch_viewports[PITCH_TOP].y
                                 + pitch_viewports[PITCH_TOP].height;

    pitch_viewports[PITCH_BOTTOM].y = pitch_viewports[PITCH_MID].y
                                    + pitch_viewports[PITCH_MID].height;

    pitch_viewports[PITCH_BOTTOM].height -= ICON_BORDER;
}

/* must be called before pitchscreen_draw, or within
 * since it neither clears nor updates the display */
static void pitchscreen_draw_icons(struct screen *display,
                                   struct viewport *parent)
{

    display->set_viewport(parent);
    int w, h;
    const unsigned char* uparrow = cbmp_get_icon(CBMP_Mono_7x8, Icon_UpArrow, &w, &h);
    if (uparrow)
        display->mono_bitmap(uparrow, parent->width/2 - 3, 2, w, h);

    const unsigned char* dnarrow = cbmp_get_icon(CBMP_Mono_7x8, Icon_DownArrow, &w, &h);
    if (dnarrow)
        display->mono_bitmap(dnarrow, parent->width /2 - 3, parent->height - 10, w, h);

    const unsigned char* fastfwd = cbmp_get_icon(CBMP_Mono_7x8, Icon_FastForward, &w, &h);
    if (fastfwd)
        display->mono_bitmap(fastfwd, parent->width - 10, parent->height /2 - 4, 7, 8);

    const unsigned char* fastrew = cbmp_get_icon(CBMP_Mono_7x8, Icon_FastBackward, &w, &h);
    if (fastrew)
        display->mono_bitmap(fastrew, 2, parent->height /2 - 4, w, h);

    display->update_viewport();

}

static void pitchscreen_draw(struct screen *display, int max_lines,
                             struct viewport pitch_viewports[PITCH_ITEM_COUNT],
                             int32_t pitch, int32_t semitone
                             ,int32_t speed
                             )
{
    const char* ptr;
    char buf[32];
    int w, h;
    bool show_lang_pitch;
    struct viewport *last_vp = NULL;

     /* "Pitch up/Pitch down" - hide for a small screen,
      * the text is drawn centered automatically
      *
      * note: this assumes 5 lines always fit on a touchscreen (should be
      * reasonable) */
    if (max_lines >= 5)
    {
        int w, h;
        struct viewport *vp = &pitch_viewports[PITCH_TOP];
        last_vp = display->set_viewport(vp);
        display->clear_viewport();
#ifdef HAVE_TOUCHSCREEN
        /* two arrows in the top row, left and right column */
        char *arrows[] = { "<", ">"};
        display->getstringsize(arrows[0], &w, &h);
        display->putsxy(0, vp->height/2 - h/2, arrows[0]);
        display->putsxy(vp->width - w, vp->height/2 - h/2, arrows[1]);
#endif
        /* UP: Pitch Up */
        if (rb->global_settings->pitch_mode_semitone)
            ptr = rb->str(LANG_PITCH_UP_SEMITONE);
        else
            ptr = rb->str(LANG_PITCH_UP);

        display->getstringsize(ptr, &w, NULL);
        /* draw text */
        display->putsxy(vp->width/2 - w/2, 0, ptr);
        display->update_viewport();

        /* DOWN: Pitch Down */
        vp = &pitch_viewports[PITCH_BOTTOM];
        display->set_viewport(vp);
        display->clear_viewport();

#ifdef HAVE_TOUCHSCREEN
        ptr = rb->str(LANG_KBD_OK);
        display->getstringsize(ptr, &w, &h);
        /* one OK in the middle first column of the vp (at half height) */
        display->putsxy(vp->width/6 - w/2, vp->height/2 - h/2, ptr);
        /* one OK in the middle of the last column of the vp (at half height) */
        display->putsxy(5*vp->width/6 - w/2, vp->height/2 - h/2, ptr);
#endif
        if (rb->global_settings->pitch_mode_semitone)
            ptr = rb->str(LANG_PITCH_DOWN_SEMITONE);
        else
            ptr = rb->str(LANG_PITCH_DOWN);
        display->getstringsize(ptr, &w, &h);
        /* draw text */
        display->putsxy(vp->width/2 - w/2, vp->height - h, ptr);
        display->update_viewport();
    }

    /* Middle section */
    display->set_viewport(&pitch_viewports[PITCH_MID]);
    display->clear_viewport();
    int width_used = 0;

    /* Middle section upper line - hide for a small screen */
    if ((show_lang_pitch = (max_lines >= 3)))
    {
        if(rb->global_settings->pitch_mode_timestretch)
        {
            /* Pitch:XXX.X% */
            if(rb->global_settings->pitch_mode_semitone)
            {
                rb->snprintf(buf, sizeof(buf), "%s: %s%d.%02d", rb->str(LANG_PITCH),
                         semitone >= 0 ? "+" : "-",
                         abs(semitone / PITCH_SPEED_PRECISION),
                         abs((semitone % PITCH_SPEED_PRECISION) /
                                         (PITCH_SPEED_PRECISION / 100))
                        );
            }
            else
            {
                rb->snprintf(buf, sizeof(buf), "%s: %ld.%ld%%", rb->str(LANG_PITCH),
                         pitch / PITCH_SPEED_PRECISION,
                         (pitch % PITCH_SPEED_PRECISION) /
                         (PITCH_SPEED_PRECISION / 10));
            }
        }
        else
        {
            /* Rate */
            rb->snprintf(buf, sizeof(buf), "%s:", rb->str(LANG_PLAYBACK_RATE));
        }
        display->getstringsize(buf, &w, &h);
        display->putsxy((pitch_viewports[PITCH_MID].width  / 2) - (w / 2),
                        (pitch_viewports[PITCH_MID].height / 2) - h, buf);
        if (w > width_used)
            width_used = w;
    }

    /* Middle section lower line */
    /* "Speed:XXX%" */
    if(rb->global_settings->pitch_mode_timestretch)
    {
        rb->snprintf(buf, sizeof(buf), "%s: %ld.%ld%%", rb->str(LANG_SPEED),
                 speed / PITCH_SPEED_PRECISION,
                 (speed % PITCH_SPEED_PRECISION) / (PITCH_SPEED_PRECISION / 10));
    }
    else
    {
        if(rb->global_settings->pitch_mode_semitone)
        {
            rb->snprintf(buf, sizeof(buf), "%s%d.%02d",
                     semitone >= 0 ? "+" : "-",
                     abs(semitone / PITCH_SPEED_PRECISION),
                     abs((semitone % PITCH_SPEED_PRECISION) /
                                     (PITCH_SPEED_PRECISION / 100))
                    );
        }
        else
        {
            rb->snprintf(buf, sizeof(buf), "%ld.%ld%%",
                     pitch / PITCH_SPEED_PRECISION,
                     (pitch  % PITCH_SPEED_PRECISION) / (PITCH_SPEED_PRECISION / 10));
        }
    }

    display->getstringsize(buf, &w, &h);
    display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
        show_lang_pitch ? (pitch_viewports[PITCH_MID].height / 2) :
                          (pitch_viewports[PITCH_MID].height / 2) - (h / 2),
        buf);
    if (w > width_used)
        width_used = w;

    /* "limit" and "timestretch" labels */
    if (max_lines >= 7)
    {
        if(at_limit)
        {
            const char * const p = rb->str(LANG_STRETCH_LIMIT);
            display->getstringsize(p, &w, &h);
            display->putsxy((pitch_viewports[PITCH_MID].width / 2) - (w / 2),
                            (pitch_viewports[PITCH_MID].height / 2) + h, p);
            if (w > width_used)
                width_used = w;
        }
    }

    /* Middle section left/right labels */
    const char *leftlabel = "-2%";
    const char *rightlabel = "+2%";
    if (rb->global_settings->pitch_mode_timestretch)
    {
        leftlabel = "<<";
        rightlabel = ">>";
    }

    /* Only display if they fit */
    display->getstringsize(leftlabel, &w, &h);
    width_used += w;
    display->getstringsize(rightlabel, &w, &h);
    width_used += w;

    if (width_used <= pitch_viewports[PITCH_MID].width)
    {
        display->putsxy(0, (pitch_viewports[PITCH_MID].height / 2) - (h / 2),
                        leftlabel);
        display->putsxy((pitch_viewports[PITCH_MID].width - w),
                        (pitch_viewports[PITCH_MID].height / 2) - (h / 2),
                        rightlabel);
    }
    display->update_viewport();
    display->set_viewport(last_vp);
}

static int32_t pitch_increase(int32_t pitch, int32_t pitch_delta, bool allow_cutoff
                          /* need this to maintain correct pitch/speed caps */
                          , int32_t speed
                          )
{
    int32_t new_pitch;
    int32_t new_stretch;
    at_limit = false;

    if (pitch_delta < 0)
    {
        /* for large jumps, snap up to whole numbers */
        if(allow_cutoff && pitch_delta <= -PITCH_SPEED_PRECISION &&
           (pitch + pitch_delta) % PITCH_SPEED_PRECISION != 0)
        {
            pitch_delta += PITCH_SPEED_PRECISION - ((pitch + pitch_delta) % PITCH_SPEED_PRECISION);
        }

        new_pitch = pitch + pitch_delta;

        if (new_pitch < PITCH_MIN)
        {
            if (!allow_cutoff)
            {
                return pitch;
            }
            new_pitch = PITCH_MIN;
            at_limit = true;
        }
    }
    else if (pitch_delta > 0)
    {
        /* for large jumps, snap down to whole numbers */
        if(allow_cutoff && pitch_delta >= PITCH_SPEED_PRECISION &&
           (pitch + pitch_delta) % PITCH_SPEED_PRECISION != 0)
        {
            pitch_delta -= (pitch + pitch_delta) % PITCH_SPEED_PRECISION;
        }

        new_pitch = pitch + pitch_delta;

        if (new_pitch > PITCH_MAX)
        {
            if (!allow_cutoff)
                return pitch;
            new_pitch = PITCH_MAX;
            at_limit = true;
        }
    }
    else
    {
        /* pitch_delta == 0 -> no real change */
        return pitch;
    }
    if (rb->dsp_timestretch_available())
    {
        /* increase the multiple to increase precision of this calculation */
        new_stretch = GET_STRETCH(new_pitch, speed);
        if(new_stretch < STRETCH_MIN)
        {
            /* we have to ignore allow_cutoff, because we can't have the */
            /* stretch go higher than STRETCH_MAX                        */
            new_pitch = GET_PITCH(speed, STRETCH_MIN);
        }
        else if(new_stretch > STRETCH_MAX)
        {
            /* we have to ignore allow_cutoff, because we can't have the */
            /* stretch go higher than STRETCH_MAX                        */
            new_pitch = GET_PITCH(speed, STRETCH_MAX);
        }

        if(new_stretch >= STRETCH_MAX ||
           new_stretch <= STRETCH_MIN)
        {
            at_limit = true;
        }
    }

    rb->sound_set_pitch(new_pitch);

    return new_pitch;
}

static int32_t get_semitone_from_pitch(int32_t pitch)
{
    int semitone = 0;
    int32_t fractional_index = 0;

    while(semitone < NUM_SEMITONES - 1 &&
          pitch >= semitone_table[semitone + 1])
    {
        semitone++;
    }


    /* now find the fractional part */
    while(pitch > (cent_interp[fractional_index + 1] *
                   semitone_table[semitone] / PITCH_SPEED_100))
    {
        /* Check to make sure fractional_index isn't too big */
        /* This should never happen. */
        if(fractional_index >= CENT_INTERP_NUM - 1)
        {
            break;
        }
        fractional_index++;
    }

    int32_t semitone_pitch_a = cent_interp[fractional_index] *
                               semitone_table[semitone] /
                               PITCH_SPEED_100;
    int32_t semitone_pitch_b = cent_interp[fractional_index + 1] *
                               semitone_table[semitone] /
                               PITCH_SPEED_100;
    /* this will be the integer offset from the cent_interp entry */
    int32_t semitone_frac_ofs = (pitch - semitone_pitch_a) * CENT_INTERP_INTERVAL /
                            (semitone_pitch_b - semitone_pitch_a);
    semitone = (semitone + SEMITONE_START) * PITCH_SPEED_PRECISION +
                     fractional_index * CENT_INTERP_INTERVAL +
                     semitone_frac_ofs;

    return semitone;
}

static int32_t get_pitch_from_semitone(int32_t semitone)
{
    int32_t adjusted_semitone = semitone - SEMITONE_START * PITCH_SPEED_PRECISION;

    /* Find the index into the semitone table */
    int32_t semitone_index = (adjusted_semitone / PITCH_SPEED_PRECISION);

    /* set pitch to the semitone's integer part value */
    int32_t pitch = semitone_table[semitone_index];
    /* get the range of the cent modification for future calculation */
    int32_t pitch_mod_a =
        cent_interp[(adjusted_semitone % PITCH_SPEED_PRECISION) /
                    CENT_INTERP_INTERVAL];
    int32_t pitch_mod_b =
        cent_interp[(adjusted_semitone % PITCH_SPEED_PRECISION) /
                    CENT_INTERP_INTERVAL + 1];
    /* figure out the cent mod amount based on the semitone fractional value */
    int32_t pitch_mod = pitch_mod_a + (pitch_mod_b - pitch_mod_a) *
                   (adjusted_semitone % CENT_INTERP_INTERVAL) / CENT_INTERP_INTERVAL;

    /* modify pitch based on the mod amount we just calculated */
    return (pitch * pitch_mod  + PITCH_SPEED_100 / 2) / PITCH_SPEED_100;
}

static int32_t pitch_increase_semitone(int32_t pitch,
                                       int32_t current_semitone,
                                       int32_t semitone_delta
                                       , int32_t speed
                                      )
{
    int32_t new_semitone = current_semitone;

    /* snap to the delta interval */
    if(current_semitone % semitone_delta != 0)
    {
        if(current_semitone > 0 && semitone_delta > 0)
            new_semitone += semitone_delta;
        else if(current_semitone < 0 && semitone_delta < 0)
            new_semitone += semitone_delta;

        new_semitone -= new_semitone % semitone_delta;
    }
    else
        new_semitone += semitone_delta;

    /* clamp the pitch so it doesn't go beyond the pitch limits */
    if(new_semitone < (SEMITONE_START * PITCH_SPEED_PRECISION))
    {
        new_semitone = SEMITONE_START * PITCH_SPEED_PRECISION;
        at_limit = true;
    }
    else if(new_semitone > (SEMITONE_END * PITCH_SPEED_PRECISION))
    {
        new_semitone = SEMITONE_END * PITCH_SPEED_PRECISION;
        at_limit = true;
    }

    int32_t new_pitch = get_pitch_from_semitone(new_semitone);

    int32_t new_stretch = GET_STRETCH(new_pitch, speed);

    /* clamp the pitch so it doesn't go beyond the stretch limits */
    if( new_stretch > STRETCH_MAX)
    {
        new_pitch = GET_PITCH(speed, STRETCH_MAX);
        new_semitone = get_semitone_from_pitch(new_pitch);
        at_limit = true;
    }
    else if (new_stretch < STRETCH_MIN)
    {
        new_pitch = GET_PITCH(speed, STRETCH_MIN);
        new_semitone = get_semitone_from_pitch(new_pitch);
        at_limit = true;
    }

    pitch_increase(pitch, new_pitch - pitch, false
                   , speed
                   );

    return new_semitone;
}

#ifdef HAVE_TOUCHSCREEN
/*
 * Check for touchscreen presses as per sketch above in this file
 *
 * goes through each row of the, checks whether the touchscreen
 * was pressed in it. Then it looks the columns of each row for specific actions
 */
static int pitchscreen_do_touchscreen(struct viewport vps[])
{
    short x, y;
    struct viewport *this_vp = &vps[PITCH_TOP];
    int ret;
    static bool wait_for_release = false;
    ret = rb->action_get_touchscreen_press_in_vp(&x, &y, this_vp);

    /* top row */
    if (ret > ACTION_UNKNOWN)
    {   /* press on top row, left or right column
         * only toggle mode if released */
        int column = this_vp->width / 3;
        if ((x < column || x > (2*column)) && (ret == BUTTON_REL))
            return ACTION_PS_TOGGLE_MODE;


        else if (x >= column && x <= (2*column))
        {   /* center column pressed */
            if (ret == BUTTON_REPEAT)
                return ACTION_PS_INC_BIG;
            else if (ret & BUTTON_REL)
                return ACTION_PS_INC_SMALL;
        }
        return ACTION_NONE;
    }

    /* now the center row */
    this_vp = &vps[PITCH_MID];
    ret = rb->action_get_touchscreen_press_in_vp(&x, &y, this_vp);

    if (ret > ACTION_UNKNOWN)
    {
        int column = this_vp->width / 3;

        if (x < column)
        {   /* left column */
            if (ret & BUTTON_REL)
            {
                wait_for_release = false;
                return ACTION_PS_NUDGE_LEFTOFF;
            }
            else if (ret & BUTTON_REPEAT)
                return ACTION_PS_SLOWER;
            if (!wait_for_release)
            {
                wait_for_release = true;
                return ACTION_PS_NUDGE_LEFT;
            }
        }
        else if (x > (2*column))
        {   /* right column */
            if (ret & BUTTON_REL)
            {
                wait_for_release = false;
                return ACTION_PS_NUDGE_RIGHTOFF;
            }
            else if (ret & BUTTON_REPEAT)
                return ACTION_PS_FASTER;
            if (!wait_for_release)
            {
                wait_for_release = true;
                return ACTION_PS_NUDGE_RIGHT;
            }
        }
        else
            /* center column was pressed */
            return ACTION_PS_RESET;
    }

    /* now the bottom row */
    this_vp = &vps[PITCH_BOTTOM];
    ret = rb->action_get_touchscreen_press_in_vp(&x, &y, this_vp);

    if (ret > ACTION_UNKNOWN)
    {
        int column = this_vp->width / 3;

        /* left or right column is exit */
        if ((x < column || x > (2*column)) && (ret == BUTTON_REL))
            return ACTION_PS_EXIT;
        else if (x >= column && x <= (2*column))
        {   /* center column was pressed */
            if (ret & BUTTON_REPEAT)
                return ACTION_PS_DEC_BIG;
            else if (ret & BUTTON_REL)
                return ACTION_PS_DEC_SMALL;
        }
        return ACTION_NONE;
    }
    return ACTION_NONE;
}

#endif
/*
    returns:
    0 on exit
    1 if USB was connected
*/

int gui_syncpitchscreen_run(void)
{
    int button;
    int32_t pitch = rb->sound_get_pitch();
    int32_t semitone;

    int32_t new_pitch;
    int32_t pitch_delta;
    bool nudged = false;
    int i, updated = 4, decimals = 0;
    bool exit = false;
    /* should maybe be passed per parameter later, not needed for now */
    struct viewport parent[NB_SCREENS];
    struct viewport pitch_viewports[NB_SCREENS][PITCH_ITEM_COUNT];
    int max_lines[NB_SCREENS];

    //push_current_activity(ACTIVITY_PITCHSCREEN);

    int32_t new_speed = 0, new_stretch;

    /* the speed variable holds the apparent speed of the playback */
    int32_t speed;
    if (rb->dsp_timestretch_available())
    {
        speed = GET_SPEED(pitch, rb->dsp_get_timestretch());
    }
    else
    {
        speed = pitch;
    }



    /* Count decimals for speaking */
    for (i = PITCH_SPEED_PRECISION; i >= 10; i /= 10)
        decimals++;

    /* set the semitone index based on the current pitch */
    semitone = get_semitone_from_pitch(pitch);

    /* initialize pitchscreen vps */
    FOR_NB_SCREENS(i)
    {
        rb->viewport_set_defaults(&parent[i], i);
        max_lines[i] = viewport_get_nb_lines(&parent[i]);
        pitchscreen_fix_viewports(&parent[i], pitch_viewports[i]);
        rb->screens[i]->set_viewport(&parent[i]);
        rb->screens[i]->clear_viewport();

        /* also, draw the icons now, it's only needed once */
        pitchscreen_draw_icons(rb->screens[i], &parent[i]);
    }


    while (!exit)
    {
        FOR_NB_SCREENS(i)
            pitchscreen_draw(rb->screens[i], max_lines[i],
                              pitch_viewports[i], pitch, semitone
                              , speed
                              );
        pitch_delta = 0;
        new_speed = 0;

        if (rb->global_settings->talk_menu && updated)
        {
            rb->talk_shutup();
            switch (updated)
            {
            case 1:
                if (rb->global_settings->pitch_mode_semitone)
                    rb->talk_value_decimal(semitone, UNIT_SIGNED, decimals, false);
                else
                    rb->talk_value_decimal(pitch, UNIT_PERCENT, decimals, false);
                break;
            case 2:
                rb->talk_value_decimal(speed, UNIT_PERCENT, decimals, false);
                break;
            case 3:
                speak_pitch_mode(false);
                break;
            case 4:
                if (rb->global_settings->pitch_mode_timestretch && rb->dsp_timestretch_available())
                    rb->talk_id(LANG_PITCH, false);
                else
                    rb->talk_id(LANG_PLAYBACK_RATE, false);
                rb->talk_value_decimal(pitch, UNIT_PERCENT, decimals, true);
                if (rb->global_settings->pitch_mode_timestretch && rb->dsp_timestretch_available())
                {
                    rb->talk_id(LANG_SPEED, true);
                    rb->talk_value_decimal(speed, UNIT_PERCENT, decimals, true);
                }
                speak_pitch_mode(true);
                break;
            default:
                break;
            }
        }
        updated = 0;

        button = rb->get_action(CONTEXT_PITCHSCREEN, HZ);

#ifdef HAVE_TOUCHSCREEN
        if (button == ACTION_TOUCHSCREEN)
        {
            FOR_NB_SCREENS(i)
                button = pitchscreen_do_touchscreen(pitch_viewports[i]);
        }
#endif
        switch (button)
        {
            case ACTION_PS_INC_SMALL:
                if(rb->global_settings->pitch_mode_semitone)
                    pitch_delta = SEMITONE_SMALL_DELTA;
                else
                    pitch_delta = PITCH_SMALL_DELTA;
                updated = 1;
                break;

            case ACTION_PS_INC_BIG:
                if(rb->global_settings->pitch_mode_semitone)
                    pitch_delta = SEMITONE_BIG_DELTA;
                else
                    pitch_delta = PITCH_BIG_DELTA;
                updated = 1;
                break;

            case ACTION_PS_DEC_SMALL:
                if(rb->global_settings->pitch_mode_semitone)
                    pitch_delta = -SEMITONE_SMALL_DELTA;
                else
                    pitch_delta = -PITCH_SMALL_DELTA;
                updated = 1;
                break;

            case ACTION_PS_DEC_BIG:
                if(rb->global_settings->pitch_mode_semitone)
                    pitch_delta = -SEMITONE_BIG_DELTA;
                else
                    pitch_delta = -PITCH_BIG_DELTA;
                updated = 1;
                break;

            case ACTION_PS_NUDGE_RIGHT:
                if (!rb->global_settings->pitch_mode_timestretch)
                {
                    new_pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false
                                               , speed
                        );
                    nudged = (new_pitch != pitch);
                    pitch = new_pitch;
                    semitone = get_semitone_from_pitch(pitch);
                    speed = pitch;
                    updated = nudged ? 1 : 0;
                    break;
                }
                else
                {
                    new_speed = speed + SPEED_SMALL_DELTA;
                    at_limit = false;
                    updated = 2;
                }
                break;

            case ACTION_PS_FASTER:
                if (rb->global_settings->pitch_mode_timestretch)
                {
                    new_speed = speed + SPEED_BIG_DELTA;
                    /* snap to whole numbers */
                    if(new_speed % PITCH_SPEED_PRECISION != 0)
                        new_speed -= new_speed % PITCH_SPEED_PRECISION;
                    at_limit = false;
                    updated = 2;
                }
                break;

            case ACTION_PS_NUDGE_RIGHTOFF:
                if (nudged)
                {
                    pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false
                                           , speed
                        );
                    speed = pitch;
                    semitone = get_semitone_from_pitch(pitch);
                    nudged = false;
                    updated = 1;
                }
                break;

            case ACTION_PS_NUDGE_LEFT:
                if (!rb->global_settings->pitch_mode_timestretch)
                {
                    new_pitch = pitch_increase(pitch, -PITCH_NUDGE_DELTA, false
                                               , speed
                        );
                    nudged = (new_pitch != pitch);
                    pitch = new_pitch;
                    semitone = get_semitone_from_pitch(pitch);
                    speed = pitch;
                    updated = nudged ? 1 : 0;
                    break;
                }
                else
                {
                    new_speed = speed - SPEED_SMALL_DELTA;
                    at_limit = false;
                    updated = 2;
                }
                break;

            case ACTION_PS_SLOWER:
                if (rb->global_settings->pitch_mode_timestretch)
                {
                    new_speed = speed - SPEED_BIG_DELTA;
                    /* snap to whole numbers */
                    if(new_speed % PITCH_SPEED_PRECISION != 0)
                        new_speed += PITCH_SPEED_PRECISION - speed % PITCH_SPEED_PRECISION;
                    at_limit = false;
                    updated = 2;
                }
                break;

            case ACTION_PS_NUDGE_LEFTOFF:
                if (nudged)
                {
                    pitch = pitch_increase(pitch, PITCH_NUDGE_DELTA, false
                                           , speed
                        );
                    speed = pitch;
                    semitone = get_semitone_from_pitch(pitch);
                    nudged = false;
                    updated = 1;
                }
                break;

            case ACTION_PS_RESET:
                pitch = PITCH_SPEED_100;
                rb->sound_set_pitch(pitch);
                speed = PITCH_SPEED_100;
                if (rb->dsp_timestretch_available())
                {
                    rb->dsp_set_timestretch(PITCH_SPEED_100);
                    at_limit = false;
                }
                semitone = get_semitone_from_pitch(pitch);
                updated = 4;
                break;

            case ACTION_PS_TOGGLE_MODE:
                rb->global_settings->pitch_mode_semitone = !rb->global_settings->pitch_mode_semitone;

                if (rb->dsp_timestretch_available() && !rb->global_settings->pitch_mode_semitone)
                {
                    rb->global_settings->pitch_mode_timestretch = !rb->global_settings->pitch_mode_timestretch;
                    if(!rb->global_settings->pitch_mode_timestretch)
                    {
                        /* no longer in timestretch mode.  Reset speed */
                        speed = pitch;
                        rb->dsp_set_timestretch(PITCH_SPEED_100);
                    }
                }
                rb->settings_save();
                updated = 3;
                break;

            case ACTION_PS_EXIT:
                exit = true;
                break;

            default:
                if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
                    return 1;
                break;
        }
        if (pitch_delta)
        {
            if (rb->global_settings->pitch_mode_semitone)
            {
                semitone = pitch_increase_semitone(pitch, semitone, pitch_delta
                                                , speed
                );
                pitch = get_pitch_from_semitone(semitone);
            }
            else
            {
                pitch = pitch_increase(pitch, pitch_delta, true
                                       , speed
                );
                semitone = get_semitone_from_pitch(pitch);
            }
            if (rb->global_settings->pitch_mode_timestretch)
            {
                /* do this to make sure we properly obey the stretch limits */
                new_speed = speed;
            }
            else
            {
                speed = pitch;
            }
        }

        if(new_speed)
        {
            new_stretch = GET_STRETCH(pitch, new_speed);

            /* limit the amount of stretch */
            if(new_stretch > STRETCH_MAX)
            {
                new_stretch = STRETCH_MAX;
                new_speed = GET_SPEED(pitch, new_stretch);
            }
            else if(new_stretch < STRETCH_MIN)
            {
                new_stretch = STRETCH_MIN;
                new_speed = GET_SPEED(pitch, new_stretch);
            }

            new_stretch = GET_STRETCH(pitch, new_speed);
            if(new_stretch >= STRETCH_MAX ||
               new_stretch <= STRETCH_MIN)
            {
                at_limit = true;
            }

            /* set the amount of stretch */
            rb->dsp_set_timestretch(new_stretch);

            /* update the speed variable with the new speed */
            speed = new_speed;

            /* Reset new_speed so we only call dsp_set_timestretch */
            /* when needed                                         */
            new_speed = 0;
        }
    }

    //rb->pcmbuf_set_low_latency(false);
    //pop_current_activity();

    /* Clean up */
    FOR_NB_SCREENS(i)
    {
        rb->screens[i]->set_viewport(NULL);
    }

    return 0;
}

static int arg_callback(char argchar, const char **parameter, void *userdata)
{
    (void)userdata;
    int ret;
    long num, dec;
    bool bret;
    //rb->splashf(100, "Arg: %c", argchar);
    while (*parameter[0] > '/' && ispunct(*parameter[0])) (*parameter)++;
    switch (tolower(argchar))
    {
        case 'q' :
            pitch_vars.flags &= ~PVAR_VERBOSE;
            break;
        case 'g' :
            pitch_vars.flags |= PVAR_GUI;
            break;
        case 'p' :
            ret = longnum_parse(parameter, &num, &dec);
            if (ret)
            {
                dec /= (ARGPARSE_FRAC_DEC_MULTIPLIER / PITCH_SPEED_PRECISION);
                if (num < 0)
                    dec = -dec;
                pitch_vars.pitch = (num * PITCH_SPEED_PRECISION + (dec % PITCH_SPEED_PRECISION));
            }
            break;
        case 'k' :
            ret = bool_parse(parameter, &bret);
            if (ret)
            {
                if(!bret && rb->dsp_timestretch_available())
                {
                    /* no longer in timestretch mode.  Reset speed */
                    rb->dsp_set_timestretch(PITCH_SPEED_100);
                }
                rb->dsp_timestretch_enable(bret);
                if ((pitch_vars.flags & PVAR_VERBOSE) == PVAR_VERBOSE)
                    rb->splashf(HZ, "Timestretch: %s", bret ? "true" : "false");
                int n = 10; /* 1 second */
                while (bret && n-- > 0 && !rb->dsp_timestretch_available())
                {
                    rb->sleep(HZ / 10);
                }
            }
            break;
        case 's' :
            ret = longnum_parse(parameter, &num, &dec);
            if (ret && rb->dsp_timestretch_available())
            {
                dec /= (ARGPARSE_FRAC_DEC_MULTIPLIER / PITCH_SPEED_PRECISION);
                if (num < 0)
                    break;
                pitch_vars.speed = (num * PITCH_SPEED_PRECISION + (dec % PITCH_SPEED_PRECISION));

            }
            break;
        default :
            rb->splashf(HZ, "Unknown switch '%c'",argchar);
            //return 0;
    }

    return 1;
}

void fill_pitchvars(struct pvars *pv)
{
    if (!pv)
        return;
    pv->pitch = rb->sound_get_pitch();

    /* the speed variable holds the apparent speed of the playback */
    if (rb->dsp_timestretch_available())
    {
        pv->speed = GET_SPEED(pv->pitch, rb->dsp_get_timestretch());
    }
    else
    {
        pv->speed = pv->pitch;
    }

    pv->stretch = GET_STRETCH(pv->pitch, pv->speed);
    pv->flags |= PVAR_VERBOSE;

}
/* plugin entry point */
enum plugin_status plugin_start(const void* parameter)
{
 /* pitch_screen
 *  accepts args -q, -g, -p=, -s=, -k=; (= sign is optional)
 * -q silences output splash
 * -g runs the gui (DEFAULT)
 * -p100 would set pitch to 100%
 * -s=90 sets speed to 90% if timestrech is enabled
 * -k=true -k1 enables time stretch -k0 -kf-kn disables
*/
    bool gui = false;
    rb->pcmbuf_set_low_latency(true);

    /* Figure out whether to be in timestretch mode */
    if (parameter == NULL) /* gui mode */
    {
        if (rb->global_settings->pitch_mode_timestretch && !rb->dsp_timestretch_available())
        {
            rb->global_settings->pitch_mode_timestretch = false;
            rb->settings_save();
        }
        gui = true;
    }
    else
    {
        struct pvars cur;
        fill_pitchvars(&cur);
        fill_pitchvars(&pitch_vars);
        argparse((const char*) parameter, -1, NULL, &arg_callback);
        if (pitch_vars.pitch != cur.pitch)
        {
            rb->sound_set_pitch(pitch_vars.pitch);
            pitch_vars.pitch = rb->sound_get_pitch();
            if ((pitch_vars.flags & PVAR_VERBOSE) == PVAR_VERBOSE)
                rb->splashf(HZ, "pitch: %ld.%02ld%%",
                            pitch_vars.pitch / PITCH_SPEED_PRECISION,
                            pitch_vars.pitch % PITCH_SPEED_PRECISION);
        }
        if (pitch_vars.speed != cur.speed)
        {
                pitch_vars.stretch = GET_STRETCH(pitch_vars.pitch, pitch_vars.speed);

                /* limit the amount of stretch */
                if(pitch_vars.stretch > STRETCH_MAX)
                {
                    pitch_vars.stretch = STRETCH_MAX;
                    pitch_vars.speed = GET_SPEED(pitch_vars.pitch, pitch_vars.stretch);
                }
                else if(pitch_vars.stretch < STRETCH_MIN)
                {
                    pitch_vars.stretch = STRETCH_MIN;
                    pitch_vars.speed = GET_SPEED(pitch_vars.pitch, pitch_vars.stretch);
                }

                pitch_vars.stretch = GET_STRETCH(pitch_vars.pitch, pitch_vars.speed);
                if ((pitch_vars.flags & PVAR_VERBOSE) == PVAR_VERBOSE)
                    rb->splashf(HZ, "speed: %ld.%02ld%%",
                                pitch_vars.speed / PITCH_SPEED_PRECISION,
                                pitch_vars.speed % PITCH_SPEED_PRECISION);
                /* set the amount of stretch */
                rb->dsp_set_timestretch(pitch_vars.stretch);
        }
        gui = ((pitch_vars.flags & PVAR_GUI) == PVAR_GUI);
        if ((pitch_vars.flags & PVAR_VERBOSE) == PVAR_VERBOSE)
            rb->splashf(HZ, "GUI: %d", gui);

    }

    if (gui && gui_syncpitchscreen_run() == 1)
            return PLUGIN_USB_CONNECTED;
    rb->pcmbuf_set_low_latency(false);
    return PLUGIN_OK;
}