summaryrefslogtreecommitdiffstats
path: root/apps/plugins/vu_meter.c
blob: 4a68088270a345ebaed3486d0c6c30345dcdc9b8 (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
/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 *
 * Copyright (C) 2003 Lee Pilgrim
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 **************************************************************************/
#include "plugin.h"

#if defined(HAVE_LCD_BITMAP)

PLUGIN_HEADER

/* variable button definitions */
#if CONFIG_KEYPAD == RECORDER_PAD
#define VUMETER_QUIT BUTTON_OFF
#define VUMETER_HELP BUTTON_ON
#define VUMETER_MENU BUTTON_F1
#define VUMETER_MENU_EXIT BUTTON_F1
#define VUMETER_MENU_EXIT2 BUTTON_OFF
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif CONFIG_KEYPAD == ARCHOS_AV300_PAD
#define VUMETER_QUIT BUTTON_OFF
#define VUMETER_HELP BUTTON_ON
#define VUMETER_MENU BUTTON_F1
#define VUMETER_MENU_EXIT BUTTON_F1
#define VUMETER_MENU_EXIT2 BUTTON_OFF
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif CONFIG_KEYPAD == ONDIO_PAD
#define VUMETER_QUIT BUTTON_OFF
#define VUMETER_HELP_PRE BUTTON_MENU
#define VUMETER_HELP (BUTTON_MENU | BUTTON_REL)
#define VUMETER_MENU_PRE BUTTON_MENU
#define VUMETER_MENU (BUTTON_MENU | BUTTON_REPEAT)
#define VUMETER_MENU_EXIT BUTTON_MENU
#define VUMETER_MENU_EXIT2 BUTTON_OFF
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
      (CONFIG_KEYPAD == IRIVER_H300_PAD)
#define VUMETER_QUIT BUTTON_OFF
#define VUMETER_HELP BUTTON_ON
#define VUMETER_MENU BUTTON_SELECT
#define VUMETER_MENU_EXIT BUTTON_SELECT
#define VUMETER_MENU_EXIT2 BUTTON_OFF
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#define VUMETER_RC_QUIT BUTTON_RC_STOP

#elif (CONFIG_KEYPAD == IPOD_3G_PAD) || \
      (CONFIG_KEYPAD == IPOD_4G_PAD)
#define VUMETER_QUIT BUTTON_MENU
#define VUMETER_HELP BUTTON_PLAY
#define VUMETER_MENU BUTTON_SELECT
#define VUMETER_MENU_EXIT BUTTON_SELECT
#define VUMETER_MENU_EXIT2 BUTTON_MENU
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_SCROLL_FWD
#define VUMETER_DOWN BUTTON_SCROLL_BACK

#elif (CONFIG_KEYPAD == GIGABEAT_PAD)
#define VUMETER_QUIT BUTTON_POWER
#define VUMETER_HELP BUTTON_A
#define VUMETER_MENU BUTTON_SELECT
#define VUMETER_MENU_EXIT BUTTON_SELECT
#define VUMETER_MENU_EXIT2 BUTTON_POWER
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif (CONFIG_KEYPAD == SANSA_E200_PAD)
#define VUMETER_QUIT BUTTON_POWER
#define VUMETER_HELP BUTTON_REC
#define VUMETER_MENU BUTTON_SELECT
#define VUMETER_MENU_EXIT BUTTON_SELECT
#define VUMETER_MENU_EXIT2 BUTTON_POWER
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif CONFIG_KEYPAD == IAUDIO_X5_PAD
#define VUMETER_QUIT BUTTON_POWER
#define VUMETER_HELP BUTTON_PLAY
#define VUMETER_MENU BUTTON_SELECT
#define VUMETER_MENU_EXIT BUTTON_SELECT
#define VUMETER_MENU_EXIT2 BUTTON_POWER
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_UP
#define VUMETER_DOWN BUTTON_DOWN

#elif CONFIG_KEYPAD == IRIVER_H10_PAD
#define VUMETER_QUIT BUTTON_POWER
#define VUMETER_HELP BUTTON_PLAY
#define VUMETER_MENU BUTTON_REW
#define VUMETER_MENU_EXIT BUTTON_REW
#define VUMETER_MENU_EXIT2 BUTTON_POWER
#define VUMETER_LEFT BUTTON_LEFT
#define VUMETER_RIGHT BUTTON_RIGHT
#define VUMETER_UP BUTTON_SCROLL_UP
#define VUMETER_DOWN BUTTON_SCROLL_DOWN

#endif

const struct plugin_api* rb;

#if SIMULATOR && (CONFIG_CODEC != SWCODEC)
#define mas_codec_readreg(x) rand()%MAX_PEAK
#endif

/* Defines x positions on a logarithmic (dBfs) scale. */
unsigned char analog_db_scale[LCD_WIDTH/2];

/* Define's y positions, to make the needle arch, like a real needle would. */
unsigned char y_values[LCD_WIDTH/2];

const unsigned char digital_db_scale[] =
{0,2,3,5,5,6,6,6,7,7,7,7,8,8,8,8,8,9,9,9,9,9,9,9,9,10,10,
10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11};

const unsigned char needle_cover[] =
{0x18, 0x1c, 0x1c, 0x1e, 0x1e, 0x1f, 0x1f, 0x1f, 0x1e, 0x1e, 0x1c, 0x1c, 0x18};

const unsigned char sound_speaker[] = {0x18,0x24,0x42,0xFF};
const unsigned char sound_low_level[] = {0x24,0x18};
const unsigned char sound_med_level[] = {0x42,0x3C};
const unsigned char sound_high_level[] = {0x81,0x7E};
const unsigned char sound_max_level[] = {0x0E,0xDF,0x0E};

const int half_width = LCD_WIDTH / 2;
const int quarter_width = LCD_WIDTH / 4;
const int half_height = LCD_HEIGHT / 2;

/* approx ratio of the previous hard coded values */
const int analog_mini_1 = (LCD_WIDTH / 2)*0.1;
const int analog_mini_2 = (LCD_WIDTH / 2)*0.25;
const int analog_mini_3 = (LCD_WIDTH / 2)*0.4;
const int analog_mini_4 = (LCD_WIDTH / 2)*0.75;

const int digital_block_width = LCD_WIDTH / 11;
const int digital_block_gap = (int)(LCD_WIDTH / 11) / 10;
/* ammount to lead in on left so 11x blocks are centered - is often 0 */
const int digital_lead = (LCD_WIDTH - (((int)(LCD_WIDTH / 11))*11) ) / 2;

const int digital_block_height = (LCD_HEIGHT - 54) / 2 ;

#define ANALOG 1 /* The two meter types */
#define DIGITAL 2

int left_needle_top_y;
int left_needle_top_x;
int last_left_needle_top_x;
int right_needle_top_y;
int right_needle_top_x;
int last_right_needle_top_x = LCD_WIDTH / 2;

int num_left_leds;
int num_right_leds;
int last_num_left_leds;
int last_num_right_leds;

int i;

#define MAX_PEAK 0x8000

/* gap at the top for left/right etc */
#define NEEDLE_TOP 25

/* pow(M_E, 5) * 65536 */
#define E_POW_5 9726404

struct saved_settings {
    int meter_type;
    bool analog_use_db_scale;
    bool digital_use_db_scale;
    bool analog_minimeters;
    bool digital_minimeters;
    int analog_decay;
    int digital_decay; 
} settings;

void reset_settings(void) {
    settings.meter_type=ANALOG;
    settings.analog_use_db_scale=true;
    settings.digital_use_db_scale=true;
    settings.analog_minimeters=true;
    settings.digital_minimeters=false;
    settings.analog_decay=3;
    settings.digital_decay=0; 
}

/* taken from http://www.quinapalus.com/efunc.html */
int fxlog(int x) {
    int t,y;

    y=0xa65af;
    if(x<0x00008000) x<<=16,              y-=0xb1721;
    if(x<0x00800000) x<<= 8,              y-=0x58b91;
    if(x<0x08000000) x<<= 4,              y-=0x2c5c8;
    if(x<0x20000000) x<<= 2,              y-=0x162e4;
    if(x<0x40000000) x<<= 1,              y-=0x0b172;
    t=x+(x>>1); if((t&0x80000000)==0) x=t,y-=0x067cd;
    t=x+(x>>2); if((t&0x80000000)==0) x=t,y-=0x03920;
    t=x+(x>>3); if((t&0x80000000)==0) x=t,y-=0x01e27;
    t=x+(x>>4); if((t&0x80000000)==0) x=t,y-=0x00f85;
    t=x+(x>>5); if((t&0x80000000)==0) x=t,y-=0x007e1;
    t=x+(x>>6); if((t&0x80000000)==0) x=t,y-=0x003f8;
    t=x+(x>>7); if((t&0x80000000)==0) x=t,y-=0x001fe;
    x=0x80000000-x;
    y-=x>>15;
    return y;
}

/*
 * Integer square root routine, good for up to 32-bit values.
 * Note that the largest square root (that of 0xffffffff) is
 * 0xffff, so the result fits in a regular unsigned and need
 * not be `long'.
 *
 * Original code from Tomas Rokicki (using a well known algorithm).
 * This version by Chris Torek, University of Maryland.
 *
 * This code is in the public domain.
 */
unsigned int root(unsigned long v)
{
        register unsigned long t = 1L << 30, r = 0, s;  /* 30 = 15*2 */

#define STEP(k) \
        s = t + r; \
        r >>= 1; \
        if (s <= v) { \
                v -= s; \
                r |= t; \
        }
        STEP(15); t >>= 2;
        STEP(14); t >>= 2;
        STEP(13); t >>= 2;
        STEP(12); t >>= 2;
        STEP(11); t >>= 2;
        STEP(10); t >>= 2;
        STEP(9); t >>= 2;
        STEP(8); t >>= 2;
        STEP(7); t >>= 2;
        STEP(6); t >>= 2;
        STEP(5); t >>= 2;
        STEP(4); t >>= 2;
        STEP(3); t >>= 2;
        STEP(2); t >>= 2;
        STEP(1); t >>= 2;
        STEP(0);
        return r;

}

void calc_scales(void)
{
    unsigned int fx_log_factor = E_POW_5/half_width;
    unsigned int y,z;

    for (i=1; i <= half_width; i++)
    {
        y = (half_width/5)*fxlog(i*fx_log_factor);

        /* better way of checking for negative values? */
        z = y>>16;
        if (z > LCD_WIDTH)
            z = 0;

        analog_db_scale[i-1] = z;
        /* play nice */
        rb->yield();
    }

    long j;
    long k;
    unsigned int l;
    int nh = LCD_HEIGHT - NEEDLE_TOP;
    long nh2 = nh*nh;
    for (i=1; i<=half_width; i++)
    {
        j = i - (int)(half_width/2);
        k = nh2 - ( j * j );
        /* +1 seems to give a closer approximation */
        l = root(k) + 1;
        l = LCD_HEIGHT - l;

        y_values[i-1] = l;
        rb->yield();
    }

}

void load_settings(void) {
    int fp = rb->open("/.rockbox/rocks/.vu_meter", O_RDONLY);
    if(fp>=0) {
            rb->read(fp, &settings, sizeof(struct saved_settings));
            rb->close(fp);
    }
    else {
        reset_settings();
#if CONFIG_KEYPAD == RECORDER_PAD
        rb->splash(HZ, true, "Press ON for help");
#elif CONFIG_KEYPAD == ONDIO_PAD
        rb->splash(HZ, true, "Press MODE for help");
#endif
    }
}

void save_settings(void) {
    int fp = rb->creat("/.rockbox/rocks/.vu_meter");
    if(fp >= 0) {
        rb->write (fp, &settings, sizeof(struct saved_settings));
        rb->close(fp);
    }
}

void change_volume(int delta) {
    char curr_vol[5];
    int minvol = rb->sound_min(SOUND_VOLUME);
    int maxvol = rb->sound_max(SOUND_VOLUME);
    int vol = rb->global_settings->volume + delta;

    if (vol > maxvol) vol = maxvol;
    else if (vol < minvol) vol = minvol;
    if (vol != rb->global_settings->volume) {
        rb->sound_set(SOUND_VOLUME, vol);
        rb->global_settings->volume = vol;
        rb->snprintf(curr_vol, sizeof(curr_vol), "%d", vol);
        rb->lcd_putsxy(0,0, curr_vol);
        rb->lcd_update();
        rb->sleep(HZ/12);
    }
}

void change_settings(void)
{
    int selected_setting=0;
    bool quit=false;
    while(!quit)
    {
        rb->lcd_clear_display();

        rb->lcd_putsxy(33, 0, "Settings");

        rb->lcd_putsxy(0, 8, "Meter type:");
        if(settings.meter_type==ANALOG)
            rb->lcd_putsxy(67, 8, "Analog");
        else
            rb->lcd_putsxy(67, 8, "Digital");

        if(settings.meter_type==ANALOG) {
            rb->lcd_putsxy(0, 16, "Scale:");
            if(settings.analog_use_db_scale)
                rb->lcd_putsxy(36, 16, "dBfs");
            else
                rb->lcd_putsxy(36, 16, "Linear");

            rb->lcd_putsxy(0, 24, "Minimeters:");
            if(settings.analog_minimeters)
                rb->lcd_putsxy(65, 24, "On");
            else
                rb->lcd_putsxy(65, 24, "Off");

            rb->lcd_putsxy(0, 32, "Decay Speed:");
            switch(settings.analog_decay) {
                case 0: rb->lcd_putsxy(10, 40, "No Decay");    break;
                case 1: rb->lcd_putsxy(10, 40, "Very Fast");   break;
                case 2: rb->lcd_putsxy(10, 40, "Fast");        break;
                case 3: rb->lcd_putsxy(10, 40, "Medium");      break;
                case 4: rb->lcd_putsxy(10, 40, "Medium-Slow"); break;
                case 5: rb->lcd_putsxy(10, 40, "Slow");        break;
                case 6: rb->lcd_putsxy(10, 40, "Very Slow");   break;
            }
        }
        else {
            rb->lcd_putsxy(0, 16, "Scale:");
            if(settings.digital_use_db_scale)
                rb->lcd_putsxy(36, 16, "dBfs");
            else
                rb->lcd_putsxy(36, 16, "Linear");

            rb->lcd_putsxy(0, 24, "Minimeters:");
            if(settings.digital_minimeters)
                rb->lcd_putsxy(65, 24, "On");
            else
                rb->lcd_putsxy(65, 24, "Off");

            rb->lcd_putsxy(0, 32, "Decay Speed:");
            switch(settings.digital_decay) {
                case 0: rb->lcd_putsxy(10, 40, "No Decay");    break;
                case 1: rb->lcd_putsxy(10, 40, "Very Fast");   break;
                case 2: rb->lcd_putsxy(10, 40, "Fast");        break;
                case 3: rb->lcd_putsxy(10, 40, "Medium");      break;
                case 4: rb->lcd_putsxy(10, 40, "Medium-Slow"); break;
                case 5: rb->lcd_putsxy(10, 40, "Slow");        break;
                case 6: rb->lcd_putsxy(10, 40, "Very Slow");   break;
            }
        }

        rb->lcd_set_drawmode(DRMODE_COMPLEMENT);
        rb->lcd_fillrect(0, selected_setting*8+8,111,8);
        rb->lcd_set_drawmode(DRMODE_SOLID);
        rb->lcd_update();

        switch(rb->button_get_w_tmo(1))
        {
            case VUMETER_MENU_EXIT:
            case VUMETER_MENU_EXIT2:
                quit = true;
                break;

            case VUMETER_LEFT:
                if(selected_setting==0)
                    settings.meter_type == DIGITAL ? settings.meter_type = ANALOG : settings.meter_type++;
                if(settings.meter_type==ANALOG) {
                    if(selected_setting==1)
                        settings.analog_use_db_scale = !settings.analog_use_db_scale;
                    if(selected_setting==2)
                        settings.analog_minimeters = !settings.analog_minimeters;
                    if(selected_setting==3)
                        settings.analog_decay == 0 ? settings.analog_decay = 6 : settings.analog_decay--;
                }
                else {
                    if(selected_setting==1)
                        settings.digital_use_db_scale = !settings.digital_use_db_scale;    
                    if(selected_setting==2)
                        settings.digital_minimeters = !settings.digital_minimeters;
                    if(selected_setting==3)
                        settings.digital_decay == 0 ? settings.digital_decay = 6 : settings.digital_decay--;
                }
                break;

            case VUMETER_RIGHT:
                if(selected_setting==0)
                    settings.meter_type == DIGITAL ? settings.meter_type = ANALOG : settings.meter_type++;
                if(settings.meter_type==ANALOG) {
                    if(selected_setting==1)
                        settings.analog_use_db_scale = !settings.analog_use_db_scale;
                    if(selected_setting==2)
                        settings.analog_minimeters = !settings.analog_minimeters;
                    if(selected_setting==3)
                        settings.analog_decay == 6 ? settings.analog_decay = 0 : settings.analog_decay++;
                }
                else {
                    if(selected_setting==1)
                        settings.digital_use_db_scale = !settings.digital_use_db_scale;
                    if(selected_setting==2)
                        settings.digital_minimeters = !settings.digital_minimeters;
                    if(selected_setting==3)
                        settings.digital_decay == 6 ? settings.digital_decay = 0 : settings.digital_decay++;
                }
                break;

            case VUMETER_UP:
                selected_setting == 3 ? selected_setting=0 : selected_setting++;
                break;

            case VUMETER_DOWN:
                selected_setting == 0 ? selected_setting=3 : selected_setting--;
        }
    }
}

void draw_analog_minimeters(void) {
    rb->lcd_mono_bitmap(sound_speaker, quarter_width-28, 12, 4, 8);
    rb->lcd_set_drawmode(DRMODE_FG);
    if(analog_mini_1<left_needle_top_x)
        rb->lcd_mono_bitmap(sound_low_level, quarter_width-23, 12, 2, 8);
    if(analog_mini_2<left_needle_top_x)
        rb->lcd_mono_bitmap(sound_med_level, quarter_width-21, 12, 2, 8);
    if(analog_mini_3<left_needle_top_x)
        rb->lcd_mono_bitmap(sound_high_level, quarter_width-19, 12, 2, 8);
    if(analog_mini_4<left_needle_top_x)
        rb->lcd_mono_bitmap(sound_max_level, quarter_width-16, 12, 3, 8);

    rb->lcd_set_drawmode(DRMODE_SOLID);
    rb->lcd_mono_bitmap(sound_speaker, quarter_width+half_width-30, 12, 4, 8);
    rb->lcd_set_drawmode(DRMODE_FG);
    if(analog_mini_1<(right_needle_top_x-half_width))
        rb->lcd_mono_bitmap(sound_low_level, quarter_width+half_width-25, 12, 2, 8);
    if(analog_mini_2<(right_needle_top_x-half_width))
        rb->lcd_mono_bitmap(sound_med_level, quarter_width+half_width-23, 12, 2, 8);
    if(analog_mini_3<(right_needle_top_x-half_width))
        rb->lcd_mono_bitmap(sound_high_level, quarter_width+half_width-21, 12, 2, 8);
    if(analog_mini_4<(right_needle_top_x-half_width))
        rb->lcd_mono_bitmap(sound_max_level, quarter_width+half_width-18, 12, 3, 8);
    rb->lcd_set_drawmode(DRMODE_SOLID);
}

void draw_digital_minimeters(void) {
    rb->lcd_mono_bitmap(sound_speaker, 34, half_height-8, 4, 8);
    rb->lcd_set_drawmode(DRMODE_FG);
    if(1<num_left_leds)
        rb->lcd_mono_bitmap(sound_low_level, 39, half_height-8, 2, 8);
    if(2<num_left_leds)
        rb->lcd_mono_bitmap(sound_med_level, 41, half_height-8, 2, 8);
    if(5<num_left_leds)
        rb->lcd_mono_bitmap(sound_high_level, 43, half_height-8, 2, 8);
    if(8<num_left_leds)
        rb->lcd_mono_bitmap(sound_max_level, 46, half_height-8, 3, 8);

    rb->lcd_set_drawmode(DRMODE_SOLID);
    rb->lcd_mono_bitmap(sound_speaker, 34, half_height+8, 4, 8);
    rb->lcd_set_drawmode(DRMODE_FG);
    if(1<(num_right_leds))
        rb->lcd_mono_bitmap(sound_low_level, 39, half_height+8, 2, 8);
    if(2<(num_right_leds))
        rb->lcd_mono_bitmap(sound_med_level, 41, half_height+8, 2, 8);
    if(5<(num_right_leds))
        rb->lcd_mono_bitmap(sound_high_level, 43, half_height+8, 2, 8);
    if(8<(num_right_leds))
        rb->lcd_mono_bitmap(sound_max_level, 46, half_height+8, 3, 8);
    rb->lcd_set_drawmode(DRMODE_SOLID);
}

void analog_meter(void) {

#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
    int left_peak = rb->mas_codec_readreg(0xC);
    int right_peak = rb->mas_codec_readreg(0xD);
#elif (CONFIG_CODEC == SWCODEC)
    int left_peak, right_peak;
    rb->pcm_calculate_peaks(&left_peak, &right_peak);
#endif

    if(settings.analog_use_db_scale) {
        left_needle_top_x = analog_db_scale[left_peak * half_width / MAX_PEAK];
        right_needle_top_x = analog_db_scale[right_peak * half_width / MAX_PEAK] + half_width;
    }
    else {
        left_needle_top_x = left_peak * half_width / MAX_PEAK;
        right_needle_top_x = right_peak * half_width / MAX_PEAK + half_width;
    }

    /* Makes a decay on the needle */
    left_needle_top_x = (left_needle_top_x+last_left_needle_top_x*settings.analog_decay)/(settings.analog_decay+1);
    right_needle_top_x = (right_needle_top_x+last_right_needle_top_x*settings.analog_decay)/(settings.analog_decay+1);

    last_left_needle_top_x = left_needle_top_x;
    last_right_needle_top_x = right_needle_top_x;

    left_needle_top_y = y_values[left_needle_top_x];
    right_needle_top_y = y_values[right_needle_top_x-half_width];

    /* Needles */
    rb->lcd_drawline(quarter_width, LCD_HEIGHT-1, left_needle_top_x, left_needle_top_y);
    rb->lcd_drawline((quarter_width+half_width), LCD_HEIGHT-1, right_needle_top_x, right_needle_top_y);

    if(settings.analog_minimeters)
        draw_analog_minimeters();

    /* Needle covers */
    rb->lcd_set_drawmode(DRMODE_FG);
    rb->lcd_mono_bitmap(needle_cover, quarter_width-6, LCD_HEIGHT-5, 13, 5);
    rb->lcd_mono_bitmap(needle_cover, half_width+quarter_width-6, LCD_HEIGHT-5, 13, 5);
    rb->lcd_set_drawmode(DRMODE_SOLID);

    /* Show Left/Right */
    rb->lcd_putsxy(quarter_width-12, 12, "Left");
    rb->lcd_putsxy(half_width+quarter_width-12, 12, "Right");

    /* Line above/below  the Left/Right text */
    rb->lcd_drawline(0,9,LCD_WIDTH-1,9);
    rb->lcd_drawline(0,21,LCD_WIDTH-1,21);

    for(i=0; i<half_width; i++) {
        rb->lcd_drawpixel(i, (y_values[i])-2);
        rb->lcd_drawpixel(i+half_width, (y_values[i])-2);
    }
}

void digital_meter(void) {
#if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
    int left_peak = rb->mas_codec_readreg(0xC);
    int right_peak = rb->mas_codec_readreg(0xD);
#elif (CONFIG_CODEC == SWCODEC)
    int left_peak, right_peak;
    rb->pcm_calculate_peaks(&left_peak, &right_peak);
#endif

    if(settings.digital_use_db_scale) {
        num_left_leds = digital_db_scale[left_peak * 44 / MAX_PEAK];
        num_right_leds = digital_db_scale[right_peak * 44 / MAX_PEAK];
    }
    else {
        num_left_leds = left_peak * 11 / MAX_PEAK;
        num_right_leds = right_peak * 11 / MAX_PEAK;
    }

    num_left_leds = (num_left_leds+last_num_left_leds*settings.digital_decay)/(settings.digital_decay+1);
    num_right_leds = (num_right_leds+last_num_right_leds*settings.digital_decay)/(settings.digital_decay+1);

    last_num_left_leds = num_left_leds;
    last_num_right_leds = num_right_leds;

    rb->lcd_set_drawmode(DRMODE_FG);
    /* LEDS */
    for(i=0; i<num_left_leds; i++)
        rb->lcd_fillrect((digital_lead + (i*digital_block_width)),
            14, digital_block_width - digital_block_gap, digital_block_height);

    for(i=0; i<num_right_leds; i++)
        rb->lcd_fillrect((digital_lead + (i*digital_block_width)),
            (half_height + 20), digital_block_width - digital_block_gap, 
            digital_block_height);

    rb->lcd_set_drawmode(DRMODE_SOLID);

    if(settings.digital_minimeters)
        draw_digital_minimeters();

    /* Lines above/below where the LEDS are */
    rb->lcd_drawline(0,12,LCD_WIDTH-1,12);
    rb->lcd_drawline(0,half_height-12,LCD_WIDTH-1,half_height-12);

    rb->lcd_drawline(0,half_height+18,LCD_WIDTH-1,half_height+18);
    rb->lcd_drawline(0,LCD_HEIGHT-6,LCD_WIDTH-1,LCD_HEIGHT-6);

    /* Show Left/Right */
    rb->lcd_putsxy(2, half_height-8, "Left");
    rb->lcd_putsxy(2, half_height+8, "Right");

    /* Line in the middle */
    rb->lcd_drawline(0,half_height+3,LCD_WIDTH-1,half_height+3);
}

enum plugin_status plugin_start(struct plugin_api* api, void* parameter) {
    int button;
    int lastbutton = BUTTON_NONE;

    (void) parameter;
    rb = api;

    calc_scales();

    load_settings();
    rb->lcd_setfont(FONT_SYSFIXED);

    while (1)
    {
        rb->lcd_clear_display();

        rb->lcd_putsxy(half_width-23, 0, "VU Meter");

        if(settings.meter_type==ANALOG)
            analog_meter();
        else
            digital_meter();

        rb->lcd_update();

        button = rb->button_get_w_tmo(1);
        switch (button)
        {
#ifdef VUMETER_RC_QUIT
            case VUMETER_RC_QUIT:
#endif
            case VUMETER_QUIT:
                save_settings();
                return PLUGIN_OK;
                break;

            case VUMETER_HELP:
#ifdef VUMETER_HELP_PRE
                if (lastbutton != VUMETER_HELP_PRE)
                    break;
#endif
                rb->lcd_clear_display();
                rb->lcd_puts(0, 0, "OFF: Exit");
#if CONFIG_KEYPAD == RECORDER_PAD
                rb->lcd_puts(0, 1, "F1: Settings");
#elif CONFIG_KEYPAD == ONDIO_PAD
                rb->lcd_puts(0, 1, "MODE..: Settings");
#endif
                rb->lcd_puts(0, 2, "UP/DOWN: Volume");
                rb->lcd_update();
                rb->sleep(HZ*3);
                break;

            case VUMETER_MENU:
#ifdef VUMETER_MENU_PRE
                if (lastbutton != VUMETER_MENU_PRE)
                    break;
#endif
                change_settings();
                break;

            case VUMETER_UP:
            case VUMETER_UP | BUTTON_REPEAT:
                change_volume(1);
                break;

            case VUMETER_DOWN:
            case VUMETER_DOWN | BUTTON_REPEAT:
                change_volume(-1);
                break;

            default:
                if(rb->default_event_handler(button) == SYS_USB_CONNECTED)
                    return PLUGIN_USB_CONNECTED;
                break;
        }
        if (button != BUTTON_NONE)
            lastbutton = button;
    }
}
#endif /* #ifdef HAVE_LCD_BITMAP */