apps/plugins/vu_meter.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  *
   9  * Copyright (C) 2003 Lee Pilgrim
  10  *
  11  * This program is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU General Public License
  13  * as published by the Free Software Foundation; either version 2
  14  * of the License, or (at your option) any later version.
  15  *
  16  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  17  * KIND, either express or implied.
  18  *
  19  **************************************************************************/
  20 #include "plugin.h"
  21 #include "lib/fixedpoint.h"
  22 #include "lib/playback_control.h"
  23
  24
  25
  26 /* variable button definitions */
  27 #if CONFIG_KEYPAD == RECORDER_PAD
  28 #define VUMETER_QUIT BUTTON_OFF
  29 #define VUMETER_HELP BUTTON_ON
  30 #define VUMETER_MENU BUTTON_F1
  31 #define VUMETER_UP BUTTON_UP
  32 #define VUMETER_DOWN BUTTON_DOWN
  33 #define LABEL_HELP "ON"
  34 #define LABEL_QUIT "OFF"
  35 #define LABEL_MENU "F1"
  36 #define LABEL_VOLUME "UP/DOWN"
  37
  38 #elif CONFIG_KEYPAD == ARCHOS_AV300_PAD
  39 #define VUMETER_QUIT BUTTON_OFF
  40 #define VUMETER_HELP BUTTON_ON
  41 #define VUMETER_MENU BUTTON_F1
  42 #define VUMETER_UP BUTTON_UP
  43 #define VUMETER_DOWN BUTTON_DOWN
  44 #define LABEL_HELP "ON"
  45 #define LABEL_QUIT "OFF"
  46 #define LABEL_MENU "F1"
  47 #define LABEL_VOLUME "UP/DOWN"
  48
  49 #elif CONFIG_KEYPAD == ONDIO_PAD
  50 #define VUMETER_QUIT BUTTON_OFF
  51 #define VUMETER_HELP_PRE BUTTON_MENU
  52 #define VUMETER_HELP (BUTTON_MENU | BUTTON_REL)
  53 #define VUMETER_MENU_PRE BUTTON_MENU
  54 #define VUMETER_MENU (BUTTON_MENU | BUTTON_REPEAT)
  55 #define VUMETER_UP BUTTON_UP
  56 #define VUMETER_DOWN BUTTON_DOWN
  57 #define LABEL_HELP "MODE"
  58 #define LABEL_QUIT "OFF"
  59 #define LABEL_MENU "MODE.."
  60 #define LABEL_VOLUME "UP/DOWN"
  61
  62 #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
  63       (CONFIG_KEYPAD == IRIVER_H300_PAD)
  64 #define VUMETER_QUIT BUTTON_OFF
  65 #define VUMETER_HELP BUTTON_ON
  66 #define VUMETER_MENU BUTTON_SELECT
  67 #define VUMETER_MENU2 BUTTON_MODE
  68 #define VUMETER_UP BUTTON_UP
  69 #define VUMETER_DOWN BUTTON_DOWN
  70 #define LABEL_HELP "PLAY"
  71 #define LABEL_QUIT "STOP"
  72 #define LABEL_MENU "SELECT,MODE"
  73 #define LABEL_VOLUME "UP/DOWN"
  74
  75 #define VUMETER_RC_QUIT BUTTON_RC_STOP
  76
  77 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
  78       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  79       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  80 #define VUMETER_QUIT BUTTON_MENU
  81 #define VUMETER_HELP BUTTON_PLAY
  82 #define VUMETER_MENU BUTTON_SELECT
  83 #define VUMETER_UP BUTTON_SCROLL_FWD
  84 #define VUMETER_DOWN BUTTON_SCROLL_BACK
  85 #define LABEL_HELP "PLAY"
  86 #define LABEL_QUIT "MENU"
  87 #define LABEL_MENU "SELECT"
  88 #define LABEL_VOLUME "Wheel"
  89
  90 #elif (CONFIG_KEYPAD == GIGABEAT_PAD)
  91 #define VUMETER_QUIT BUTTON_POWER
  92 #define VUMETER_HELP BUTTON_A
  93 #define VUMETER_MENU BUTTON_MENU
  94 #define VUMETER_UP BUTTON_UP
  95 #define VUMETER_DOWN BUTTON_DOWN
  96 #define LABEL_HELP "A"
  97 #define LABEL_QUIT "POWER"
  98 #define LABEL_MENU "MENU"
  99 #define LABEL_VOLUME "UP/DOWN"
 100
 101 #elif (CONFIG_KEYPAD == SANSA_E200_PAD)
 102 #define VUMETER_QUIT BUTTON_POWER
 103 #define VUMETER_HELP BUTTON_REC
 104 #define VUMETER_MENU BUTTON_SELECT
 105 #define VUMETER_UP BUTTON_SCROLL_FWD
 106 #define VUMETER_DOWN BUTTON_SCROLL_BACK
 107 #define LABEL_HELP "REC"
 108 #define LABEL_QUIT "POWER"
 109 #define LABEL_MENU "SELECT"
 110 #define LABEL_VOLUME "Wheel"
 111
 112 #elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
 113 #define VUMETER_QUIT        (BUTTON_HOME|BUTTON_REPEAT)
 114 #define VUMETER_HELP        BUTTON_SELECT|BUTTON_REPEAT
 115 #define VUMETER_MENU        BUTTON_SELECT|BUTTON_REL
 116 #define VUMETER_UP          BUTTON_SCROLL_FWD
 117 #define VUMETER_DOWN        BUTTON_SCROLL_BACK
 118 #define LABEL_HELP          "Hold Select"
 119 #define LABEL_QUIT          "HOME"
 120 #define LABEL_MENU          "Select"
 121 #define LABEL_VOLUME        "Scrollwheel"
 122
 123 #elif (CONFIG_KEYPAD == SANSA_C200_PAD)
 124 #define VUMETER_QUIT BUTTON_POWER
 125 #define VUMETER_HELP BUTTON_REC
 126 #define VUMETER_MENU BUTTON_SELECT
 127 #define VUMETER_UP BUTTON_VOL_UP
 128 #define VUMETER_DOWN BUTTON_VOL_DOWN
 129 #define LABEL_HELP "REC"
 130 #define LABEL_QUIT "POWER"
 131 #define LABEL_MENU "SELECT"
 132 #define LABEL_VOLUME "VOL UP/DN"
 133
 134 #elif (CONFIG_KEYPAD == SANSA_CLIP_PAD)
 135 #define VUMETER_QUIT BUTTON_POWER
 136 #define VUMETER_HELP BUTTON_HOME
 137 #define VUMETER_MENU BUTTON_SELECT
 138 #define VUMETER_UP BUTTON_VOL_UP
 139 #define VUMETER_DOWN BUTTON_VOL_DOWN
 140 #define LABEL_HELP "HOME"
 141 #define LABEL_QUIT "POWER"
 142 #define LABEL_MENU "SELECT"
 143 #define LABEL_VOLUME "VOL UP/DN"
 144
 145 #elif (CONFIG_KEYPAD == SANSA_M200_PAD)
 146 #define VUMETER_QUIT BUTTON_POWER
 147 #define VUMETER_HELP (BUTTON_SELECT | BUTTON_UP)
 148 #define VUMETER_MENU (BUTTON_SELECT | BUTTON_REL)
 149 #define VUMETER_UP BUTTON_VOL_UP
 150 #define VUMETER_DOWN BUTTON_VOL_DOWN
 151 #define LABEL_HELP "SELECT + UP"
 152 #define LABEL_QUIT "POWER"
 153 #define LABEL_MENU "SELECT"
 154 #define LABEL_VOLUME "VOL UP/DN"
 155
 156 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
 157 #define VUMETER_QUIT BUTTON_POWER
 158 #define VUMETER_HELP BUTTON_PLAY
 159 #define VUMETER_MENU BUTTON_SELECT
 160 #define VUMETER_UP BUTTON_UP
 161 #define VUMETER_DOWN BUTTON_DOWN
 162 #define LABEL_HELP "PLAY"
 163 #define LABEL_QUIT "POWER"
 164 #define LABEL_MENU "SELECT"
 165 #define LABEL_VOLUME "UP/DOWN"
 166
 167 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 168 #define VUMETER_QUIT BUTTON_POWER
 169 #define VUMETER_HELP BUTTON_PLAY
 170 #define VUMETER_MENU BUTTON_REW
 171 #define VUMETER_UP BUTTON_SCROLL_UP
 172 #define VUMETER_DOWN BUTTON_SCROLL_DOWN
 173 #define LABEL_HELP "PLAY"
 174 #define LABEL_QUIT "POWER"
 175 #define LABEL_MENU "REW"
 176 #define LABEL_VOLUME "Scroller"
 177
 178 #elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
 179 #define VUMETER_QUIT BUTTON_BACK
 180 #define VUMETER_HELP BUTTON_NEXT
 181 #define VUMETER_MENU BUTTON_MENU
 182 #define VUMETER_UP BUTTON_UP
 183 #define VUMETER_DOWN BUTTON_DOWN
 184 #define LABEL_HELP "NEXT"
 185 #define LABEL_QUIT "BACK"
 186 #define LABEL_MENU "MENU"
 187 #define LABEL_VOLUME "UP/DOWN"
 188
 189 #elif (CONFIG_KEYPAD == MROBE100_PAD)
 190 #define VUMETER_QUIT BUTTON_POWER
 191 #define VUMETER_HELP BUTTON_DISPLAY
 192 #define VUMETER_MENU BUTTON_MENU
 193 #define VUMETER_UP BUTTON_UP
 194 #define VUMETER_DOWN BUTTON_DOWN
 195 #define LABEL_HELP "DISPLAY"
 196 #define LABEL_QUIT "POWER"
 197 #define LABEL_MENU "MENU"
 198 #define LABEL_VOLUME "UP/DOWN"
 199
 200 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
 201 #define VUMETER_QUIT BUTTON_RC_REC
 202 #define VUMETER_HELP BUTTON_RC_MODE
 203 #define VUMETER_MENU BUTTON_RC_MENU
 204 #define VUMETER_UP BUTTON_RC_VOL_UP
 205 #define VUMETER_DOWN BUTTON_RC_VOL_DOWN
 206 #define LABEL_HELP "MODE"
 207 #define LABEL_QUIT "REC"
 208 #define LABEL_MENU "MENU"
 209 #define LABEL_VOLUME "VOL UP/DN"
 210
 211 #elif CONFIG_KEYPAD == COWON_D2_PAD
 212 #define VUMETER_QUIT BUTTON_POWER
 213 #define VUMETER_MENU BUTTON_MENU
 214 #define LABEL_QUIT "POWER"
 215 #define LABEL_MENU "MENU"
 216
 217 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 218 #define VUMETER_QUIT BUTTON_BACK
 219 #define VUMETER_HELP BUTTON_SELECT
 220 #define VUMETER_MENU BUTTON_MENU
 221 #define VUMETER_UP BUTTON_UP
 222 #define VUMETER_DOWN BUTTON_DOWN
 223 #define LABEL_HELP "MIDDLE"
 224 #define LABEL_QUIT "BACK"
 225 #define LABEL_MENU "MENU"
 226 #define LABEL_VOLUME "UP/DOWN"
 227
 228 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 229 #define VUMETER_QUIT BUTTON_POWER
 230 #define VUMETER_HELP BUTTON_VIEW
 231 #define VUMETER_MENU BUTTON_MENU
 232 #define VUMETER_UP BUTTON_UP
 233 #define VUMETER_DOWN BUTTON_DOWN
 234 #define LABEL_HELP "VIEW"
 235 #define LABEL_QUIT "POWER"
 236 #define LABEL_MENU "MENU"
 237 #define LABEL_VOLUME "UP/DOWN"
 238
 239 #elif CONFIG_KEYPAD == PHILIPS_HDD6330_PAD
 240 #define VUMETER_QUIT BUTTON_POWER
 241 #define VUMETER_HELP BUTTON_NEXT
 242 #define VUMETER_MENU BUTTON_MENU
 243 #define VUMETER_UP BUTTON_UP
 244 #define VUMETER_DOWN BUTTON_DOWN
 245 #define LABEL_HELP "NEXT"
 246 #define LABEL_QUIT "QUIT"
 247 #define LABEL_MENU "MENU"
 248 #define LABEL_VOLUME "UP/DOWN"
 249
 250 #elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
 251 #define VUMETER_QUIT BUTTON_POWER
 252 #define VUMETER_HELP BUTTON_RIGHT
 253 #define VUMETER_MENU BUTTON_MENU
 254 #define VUMETER_UP BUTTON_UP
 255 #define VUMETER_DOWN BUTTON_DOWN
 256 #define LABEL_HELP "RIGHT"
 257 #define LABEL_QUIT "POWER"
 258 #define LABEL_MENU "MENU"
 259 #define LABEL_VOLUME "UP/DOWN"
 260
 261 #elif CONFIG_KEYPAD == ONDAVX747_PAD
 262 #define VUMETER_QUIT BUTTON_POWER
 263 #define VUMETER_MENU BUTTON_MENU
 264 #define LABEL_QUIT "POWER"
 265 #define LABEL_MENU "MENU"
 266
 267 #elif CONFIG_KEYPAD == ONDAVX777_PAD
 268 #define VUMETER_QUIT BUTTON_POWER
 269 #define LABEL_QUIT "POWER"
 270
 271 #elif CONFIG_KEYPAD == MROBE500_PAD
 272 #define VUMETER_QUIT BUTTON_POWER
 273 #define LABEL_QUIT "POWER"
 274
 275 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 276 #define VUMETER_QUIT       BUTTON_REC
 277 #define VUMETER_HELP       BUTTON_PLAY
 278 #define VUMETER_MENU       BUTTON_LEFT
 279 #define VUMETER_UP         BUTTON_UP
 280 #define VUMETER_DOWN       BUTTON_DOWN
 281 #define LABEL_HELP "PLAY"
 282 #define LABEL_QUIT "REC"
 283 #define LABEL_MENU "LEFT"
 284 #define LABEL_VOLUME "UP/DOWN"
 285
 286 #elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
 287 #define VUMETER_QUIT BUTTON_REC
 288 #define VUMETER_HELP BUTTON_PLAY
 289 #define VUMETER_MENU BUTTON_MENU
 290 #define VUMETER_UP   BUTTON_UP
 291 #define VUMETER_DOWN BUTTON_DOWN
 292 #define LABEL_HELP "PLAY"
 293 #define LABEL_QUIT "REC"
 294 #define LABEL_MENU "MENU"
 295 #define LABEL_VOLUME "UP/DOWN"
 296
 297 #elif CONFIG_KEYPAD == MPIO_HD200_PAD
 298 #define VUMETER_QUIT (BUTTON_REC|BUTTON_PLAY)
 299 #define VUMETER_HELP BUTTON_PLAY
 300 #define VUMETER_MENU BUTTON_FUNC
 301 #define VUMETER_UP BUTTON_VOL_UP
 302 #define VUMETER_DOWN BUTTON_VOL_DOWN
 303 #define LABEL_HELP "PLAY"
 304 #define LABEL_QUIT "MENU"
 305 #define LABEL_MENU "FUNC"
 306 #define LABEL_VOLUME "UP/DOWN"
 307
 308 #elif CONFIG_KEYPAD == MPIO_HD300_PAD
 309 #define VUMETER_QUIT (BUTTON_REC|BUTTON_REPEAT)
 310 #define VUMETER_HELP BUTTON_PLAY
 311 #define VUMETER_MENU BUTTON_MENU
 312 #define VUMETER_UP BUTTON_UP
 313 #define VUMETER_DOWN BUTTON_DOWN
 314 #define LABEL_HELP "PLAY"
 315 #define LABEL_QUIT "REC..."
 316 #define LABEL_MENU "MENU"
 317 #define LABEL_VOLUME "UP/DOWN"
 318
 319 #elif CONFIG_KEYPAD == SANSA_FUZEPLUS_PAD
 320 #define VUMETER_QUIT BUTTON_POWER
 321 #define VUMETER_HELP BUTTON_PLAYPAUSE
 322 #define VUMETER_MENU BUTTON_BACK
 323 #define VUMETER_UP BUTTON_UP
 324 #define VUMETER_DOWN BUTTON_DOWN
 325 #define LABEL_HELP "PLAY"
 326 #define LABEL_QUIT "POWER"
 327 #define LABEL_MENU "BACK"
 328 #define LABEL_VOLUME "UP/DOWN"
 329
 330 #elif CONFIG_KEYPAD == SANSA_CONNECT_PAD
 331 #define VUMETER_QUIT BUTTON_POWER
 332 #define VUMETER_HELP BUTTON_NEXT
 333 #define VUMETER_MENU BUTTON_PREV
 334 #define VUMETER_UP BUTTON_UP
 335 #define VUMETER_DOWN BUTTON_DOWN
 336 #define LABEL_HELP "NEXT"
 337 #define LABEL_QUIT "POWER"
 338 #define LABEL_MENU "PREV"
 339 #define LABEL_VOLUME "VOL+/VOL-"
 340
 341 #elif (CONFIG_KEYPAD == SAMSUNG_YPR0_PAD)
 342 #define VUMETER_QUIT BUTTON_BACK
 343 #define VUMETER_HELP BUTTON_USER
 344 #define VUMETER_MENU BUTTON_MENU
 345 #define VUMETER_UP   BUTTON_UP
 346 #define VUMETER_DOWN BUTTON_DOWN
 347 #define LABEL_HELP   "User"
 348 #define LABEL_QUIT   "Back"
 349 #define LABEL_MENU   "Menu"
 350 #define LABEL_VOLUME "Up/Down"
 351
 352 #else
 353 #error No keymap defined!
 354 #endif
 355
 356 #ifdef HAVE_TOUCHSCREEN
 357 #ifndef VUMETER_QUIT
 358 #define VUMETER_QUIT      BUTTON_TOPLEFT
 359 #define LABEL_QUIT        "TOPLEFT"
 360 #endif
 361 #ifndef VUMETER_HELP
 362 #define VUMETER_HELP      BUTTON_CENTER
 363 #define LABEL_HELP        "CENTRE"
 364 #endif
 365 #ifndef VUMETER_MENU
 366 #define VUMETER_MENU      BUTTON_TOPRIGHT
 367 #define LABEL_MENU        "TOPRIGHT"
 368 #endif
 369 #ifndef VUMETER_UP
 370 #define VUMETER_UP        BUTTON_TOPMIDDLE
 371 #endif
 372 #ifndef VUMETER_DOWN
 373 #define VUMETER_DOWN      BUTTON_BOTTOMMIDDLE
 374 #endif
 375 #ifndef LABEL_VOLUME
 376 #define LABEL_VOLUME      "UP/DOWN"
 377 #endif
 378 #endif
 379
 380 #if defined(SIMULATOR) && (CONFIG_CODEC != SWCODEC)
 381 #define mas_codec_readreg(x) rand()%MAX_PEAK
 382 #endif
 383
 384 /* Defines x positions on a logarithmic (dBfs) scale. */
 385 unsigned char analog_db_scale[LCD_WIDTH/2];
 386
 387 /* Define's y positions, to make the needle arch, like a real needle would. */
 388 unsigned char y_values[LCD_WIDTH/2];
 389
 390 const unsigned char digital_db_scale[] =
 391 {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,
 392 10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11};
 393
 394 const unsigned char needle_cover[] =
 395 {0x18, 0x1c, 0x1c, 0x1e, 0x1e, 0x1f, 0x1f, 0x1f, 0x1e, 0x1e, 0x1c, 0x1c, 0x18};
 396
 397 const unsigned char sound_speaker[] = {0x18,0x24,0x42,0xFF};
 398 const unsigned char sound_low_level[] = {0x24,0x18};
 399 const unsigned char sound_med_level[] = {0x42,0x3C};
 400 const unsigned char sound_high_level[] = {0x81,0x7E};
 401 const unsigned char sound_max_level[] = {0x0E,0xDF,0x0E};
 402
 403 const int half_width = LCD_WIDTH / 2;
 404 const int quarter_width = LCD_WIDTH / 4;
 405 const int half_height = LCD_HEIGHT / 2;
 406
 407 /* approx ratio of the previous hard coded values */
 408 const int analog_mini_1 = (LCD_WIDTH / 2)*0.1;
 409 const int analog_mini_2 = (LCD_WIDTH / 2)*0.25;
 410 const int analog_mini_3 = (LCD_WIDTH / 2)*0.4;
 411 const int analog_mini_4 = (LCD_WIDTH / 2)*0.75;
 412
 413 const int digital_block_width = LCD_WIDTH / 11;
 414 const int digital_block_gap = (int)(LCD_WIDTH / 11) / 10;
 415 /* ammount to lead in on left so 11x blocks are centered - is often 0 */
 416 const int digital_lead = (LCD_WIDTH - (((int)(LCD_WIDTH / 11))*11) ) / 2;
 417
 418 const int digital_block_height = (LCD_HEIGHT - 54) / 2 ;
 419
 420 #define ANALOG 0 /* The two meter types */
 421 #define DIGITAL 1
 422
 423 int left_needle_top_y;
 424 int left_needle_top_x;
 425 int last_left_needle_top_x;
 426 int right_needle_top_y;
 427 int right_needle_top_x;
 428 int last_right_needle_top_x = LCD_WIDTH / 2;
 429
 430 int num_left_leds;
 431 int num_right_leds;
 432 int last_num_left_leds;
 433 int last_num_right_leds;
 434
 435 int i;
 436 #ifdef HAVE_LCD_COLOR
 437 int screen_foreground;
 438 #endif
 439
 440 #define MAX_PEAK 0x8000
 441
 442 /* gap at the top for left/right etc */
 443 #define NEEDLE_TOP 25
 444
 445 /* pow(M_E, 5) * 65536 */
 446 #define E_POW_5 9726404
 447
 448 struct saved_settings {
 449     int meter_type;
 450     bool analog_use_db_scale;
 451     bool digital_use_db_scale;
 452     bool analog_minimeters;
 453     bool digital_minimeters;
 454     int analog_decay;
 455     int digital_decay;
 456 } vumeter_settings;
 457
 458 static void reset_settings(void) {
 459     vumeter_settings.meter_type=ANALOG;
 460     vumeter_settings.analog_use_db_scale=true;
 461     vumeter_settings.digital_use_db_scale=true;
 462     vumeter_settings.analog_minimeters=true;
 463     vumeter_settings.digital_minimeters=false;
 464     vumeter_settings.analog_decay=3;
 465     vumeter_settings.digital_decay=0;
 466 }
 467
 468 static void calc_scales(void)
 469 {
 470     unsigned int fx_log_factor = E_POW_5/half_width;
 471     unsigned int y,z;
 472
 473     long j;
 474     long k;
 475     int nh = LCD_HEIGHT - NEEDLE_TOP;
 476     long nh2 = nh*nh;
 477
 478     for (i=1; i <= half_width; i++)
 479     {
 480         /* analog scale */
 481         y = (half_width/5)*fp16_log(i*fx_log_factor);
 482
 483         /* better way of checking for negative values? */
 484         z = y>>16;
 485         if (z > LCD_WIDTH)
 486             z = 0;
 487
 488         analog_db_scale[i-1] = z;
 489         /* play nice */
 490         rb->yield();
 491
 492         /* y values (analog needle co-ords) */
 493         j = i - (int)(half_width/2);
 494         k = nh2 - ( j * j );
 495
 496         /* fsqrt+1 seems to give a closer approximation */
 497         y_values[i-1] = LCD_HEIGHT - (fp_sqrt(k, 16)>>8) - 1;
 498         rb->yield();
 499     }
 500 }
 501
 502 static void load_settings(void) {
 503     int fp = rb->open(PLUGIN_DEMOS_DATA_DIR "/.vu_meter", O_RDONLY);
 504     if(fp>=0) {
 505             rb->read(fp, &vumeter_settings, sizeof(struct saved_settings));
 506             rb->close(fp);
 507     }
 508     else {
 509         reset_settings();
 510         rb->splash(HZ, "Press " LABEL_HELP " for help");
 511     }
 512 }
 513
 514 static void save_settings(void) {
 515     int fp = rb->creat(PLUGIN_DEMOS_DATA_DIR "/.vu_meter", 0666);
 516     if(fp >= 0) {
 517         rb->write (fp, &vumeter_settings, sizeof(struct saved_settings));
 518         rb->close(fp);
 519     }
 520 }
 521
 522 static void change_volume(int delta) {
 523     int minvol = rb->sound_min(SOUND_VOLUME);
 524     int maxvol = rb->sound_max(SOUND_VOLUME);
 525     int vol = rb->global_settings->volume + delta;
 526
 527     if (vol > maxvol) vol = maxvol;
 528     else if (vol < minvol) vol = minvol;
 529     if (vol != rb->global_settings->volume) {
 530         rb->sound_set(SOUND_VOLUME, vol);
 531         rb->global_settings->volume = vol;
 532         rb->lcd_putsxyf(0,0, "%d", vol);
 533         rb->lcd_update();
 534         rb->sleep(HZ/12);
 535     }
 536 }
 537
 538 static bool vu_meter_menu(void)
 539 {
 540     int selection;
 541     bool menu_quit = false;
 542     bool exit = false;
 543
 544     MENUITEM_STRINGLIST(menu,"VU Meter Menu",NULL,"Meter Type","Scale",
 545                         "Minimeters","Decay Speed","Playback Control",
 546                         "Quit");
 547
 548     static const struct opt_items meter_type_option[2] = {
 549         { "Analog", -1 },
 550         { "Digital", -1 },
 551     };
 552
 553     static const struct opt_items decay_speed_option[7] = {
 554         { "No Decay", -1 },
 555         { "Very Fast", -1 },
 556         { "Fast", -1 },
 557         { "Medium", -1 },
 558         { "Medium-Slow", -1 },
 559         { "Slow", -1 },
 560         { "Very Slow", -1 },
 561     };
 562
 563     while (!menu_quit) {
 564         switch(rb->do_menu(&menu, &selection, NULL, false))
 565         {
 566             case 0:
 567                 rb->set_option("Meter Type", &vumeter_settings.meter_type, INT,
 568                                meter_type_option, 2, NULL);
 569                 break;
 570
 571             case 1:
 572                 if(vumeter_settings.meter_type==ANALOG)
 573                 {
 574                     rb->set_bool_options("Scale", &vumeter_settings.analog_use_db_scale,
 575                                          "dBfs", -1, "Linear", -1, NULL);
 576                 }
 577                 else
 578                 {
 579                     rb->set_bool_options("Scale", &vumeter_settings.digital_use_db_scale,
 580                                          "dBfs", -1, "Linear", -1, NULL);
 581                 }
 582                 break;
 583
 584             case 2:
 585                 if(vumeter_settings.meter_type==ANALOG)
 586                 {
 587                     rb->set_bool("Enable Minimeters",
 588                                  &vumeter_settings.analog_minimeters);
 589                 }
 590                 else
 591                 {
 592                     rb->set_bool("Enable Minimeters",
 593                                  &vumeter_settings.digital_minimeters);
 594                 }
 595                 break;
 596
 597             case 3:
 598                 if(vumeter_settings.meter_type==ANALOG)
 599                 {
 600                     rb->set_option("Decay Speed", &vumeter_settings.analog_decay, INT,
 601                                decay_speed_option, 7, NULL);
 602                 }
 603                 else
 604                 {
 605                     rb->set_option("Decay Speed", &vumeter_settings.digital_decay, INT,
 606                                decay_speed_option, 7, NULL);
 607                 }
 608                 break;
 609
 610             case 4:
 611                 playback_control(NULL);
 612                 break;
 613
 614             case 5:
 615                 exit = true;
 616                 /* fall through to exit the menu */
 617             default:
 618                 menu_quit = true;
 619                 break;
 620         }
 621     }
 622     /* the menu uses the userfont, set it back to sysfont */
 623     rb->lcd_setfont(FONT_SYSFIXED);
 624     return exit;
 625 }
 626
 627 static void draw_analog_minimeters(void) {
 628     rb->lcd_mono_bitmap(sound_speaker, quarter_width-28, 12, 4, 8);
 629     rb->lcd_set_drawmode(DRMODE_FG);
 630     if(analog_mini_1<left_needle_top_x)
 631         rb->lcd_mono_bitmap(sound_low_level, quarter_width-23, 12, 2, 8);
 632     if(analog_mini_2<left_needle_top_x)
 633         rb->lcd_mono_bitmap(sound_med_level, quarter_width-21, 12, 2, 8);
 634     if(analog_mini_3<left_needle_top_x)
 635         rb->lcd_mono_bitmap(sound_high_level, quarter_width-19, 12, 2, 8);
 636     if(analog_mini_4<left_needle_top_x)
 637         rb->lcd_mono_bitmap(sound_max_level, quarter_width-16, 12, 3, 8);
 638
 639     rb->lcd_set_drawmode(DRMODE_SOLID);
 640     rb->lcd_mono_bitmap(sound_speaker, quarter_width+half_width-30, 12, 4, 8);
 641     rb->lcd_set_drawmode(DRMODE_FG);
 642     if(analog_mini_1<(right_needle_top_x-half_width))
 643         rb->lcd_mono_bitmap(sound_low_level, quarter_width+half_width-25, 12, 2, 8);
 644     if(analog_mini_2<(right_needle_top_x-half_width))
 645         rb->lcd_mono_bitmap(sound_med_level, quarter_width+half_width-23, 12, 2, 8);
 646     if(analog_mini_3<(right_needle_top_x-half_width))
 647         rb->lcd_mono_bitmap(sound_high_level, quarter_width+half_width-21, 12, 2, 8);
 648     if(analog_mini_4<(right_needle_top_x-half_width))
 649         rb->lcd_mono_bitmap(sound_max_level, quarter_width+half_width-18, 12, 3, 8);
 650     rb->lcd_set_drawmode(DRMODE_SOLID);
 651 }
 652
 653 static void draw_digital_minimeters(void) {
 654 #ifdef HAVE_LCD_COLOR
 655     rb->lcd_set_foreground(LCD_RGBPACK(255, 255 - 23 * num_left_leds, 0));
 656 #endif
 657     rb->lcd_mono_bitmap(sound_speaker, 34, half_height-8, 4, 8);
 658     rb->lcd_set_drawmode(DRMODE_FG);
 659     if(1<num_left_leds)
 660         rb->lcd_mono_bitmap(sound_low_level, 39, half_height-8, 2, 8);
 661     if(2<num_left_leds)
 662         rb->lcd_mono_bitmap(sound_med_level, 41, half_height-8, 2, 8);
 663     if(5<num_left_leds)
 664         rb->lcd_mono_bitmap(sound_high_level, 43, half_height-8, 2, 8);
 665     if(8<num_left_leds)
 666         rb->lcd_mono_bitmap(sound_max_level, 46, half_height-8, 3, 8);
 667
 668 #ifdef HAVE_LCD_COLOR
 669     rb->lcd_set_foreground(LCD_RGBPACK(255, 255 - 23 * num_right_leds, 0));
 670 #endif
 671     rb->lcd_set_drawmode(DRMODE_SOLID);
 672     rb->lcd_mono_bitmap(sound_speaker, 34, half_height+8, 4, 8);
 673     rb->lcd_set_drawmode(DRMODE_FG);
 674     if(1<(num_right_leds))
 675         rb->lcd_mono_bitmap(sound_low_level, 39, half_height+8, 2, 8);
 676     if(2<(num_right_leds))
 677         rb->lcd_mono_bitmap(sound_med_level, 41, half_height+8, 2, 8);
 678     if(5<(num_right_leds))
 679         rb->lcd_mono_bitmap(sound_high_level, 43, half_height+8, 2, 8);
 680     if(8<(num_right_leds))
 681         rb->lcd_mono_bitmap(sound_max_level, 46, half_height+8, 3, 8);
 682     rb->lcd_set_drawmode(DRMODE_SOLID);
 683
 684 #ifdef HAVE_LCD_COLOR
 685     rb->lcd_set_foreground(screen_foreground);
 686 #endif
 687 }
 688
 689 static void analog_meter(void) {
 690
 691 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
 692     int left_peak = rb->mas_codec_readreg(0xC);
 693     int right_peak = rb->mas_codec_readreg(0xD);
 694 #elif (CONFIG_CODEC == SWCODEC)
 695     int left_peak, right_peak;
 696     rb->mixer_channel_calculate_peaks(PCM_MIXER_CHAN_PLAYBACK,
 697                                       &left_peak, &right_peak);
 698 #endif
 699
 700     if(vumeter_settings.analog_use_db_scale) {
 701         left_needle_top_x = analog_db_scale[left_peak * half_width / MAX_PEAK];
 702         right_needle_top_x = analog_db_scale[right_peak * half_width / MAX_PEAK] + half_width;
 703     }
 704     else {
 705         left_needle_top_x = left_peak * half_width / MAX_PEAK;
 706         right_needle_top_x = right_peak * half_width / MAX_PEAK + half_width;
 707     }
 708
 709     /* Makes a decay on the needle */
 710     left_needle_top_x = (left_needle_top_x+last_left_needle_top_x*vumeter_settings.analog_decay)
 711                         /(vumeter_settings.analog_decay+1);
 712     right_needle_top_x = (right_needle_top_x+last_right_needle_top_x*vumeter_settings.analog_decay)
 713                          /(vumeter_settings.analog_decay+1);
 714
 715     last_left_needle_top_x = left_needle_top_x;
 716     last_right_needle_top_x = right_needle_top_x;
 717
 718     left_needle_top_y = y_values[left_needle_top_x];
 719     right_needle_top_y = y_values[right_needle_top_x-half_width];
 720
 721     /* Needles */
 722     rb->lcd_drawline(quarter_width, LCD_HEIGHT-1, left_needle_top_x, left_needle_top_y);
 723     rb->lcd_drawline((quarter_width+half_width), LCD_HEIGHT-1, right_needle_top_x, right_needle_top_y);
 724
 725     if(vumeter_settings.analog_minimeters)
 726         draw_analog_minimeters();
 727
 728     /* Needle covers */
 729     rb->lcd_set_drawmode(DRMODE_FG);
 730     rb->lcd_mono_bitmap(needle_cover, quarter_width-6, LCD_HEIGHT-5, 13, 5);
 731     rb->lcd_mono_bitmap(needle_cover, half_width+quarter_width-6, LCD_HEIGHT-5, 13, 5);
 732     rb->lcd_set_drawmode(DRMODE_SOLID);
 733
 734     /* Show Left/Right */
 735     rb->lcd_putsxy(quarter_width-12, 12, "Left");
 736     rb->lcd_putsxy(half_width+quarter_width-12, 12, "Right");
 737
 738     /* Line above/below  the Left/Right text */
 739     rb->lcd_hline(0,LCD_WIDTH-1,9);
 740     rb->lcd_hline(0,LCD_WIDTH-1,21);
 741
 742     for(i=0; i<half_width; i++) {
 743         rb->lcd_drawpixel(i, (y_values[i])-2);
 744         rb->lcd_drawpixel(i+half_width, (y_values[i])-2);
 745     }
 746 }
 747
 748 static void digital_meter(void) {
 749 #if (CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)
 750     int left_peak = rb->mas_codec_readreg(0xC);
 751     int right_peak = rb->mas_codec_readreg(0xD);
 752 #elif (CONFIG_CODEC == SWCODEC)
 753     int left_peak, right_peak;
 754     rb->pcm_calculate_peaks(&left_peak, &right_peak);
 755 #endif
 756
 757     if(vumeter_settings.digital_use_db_scale) {
 758         num_left_leds = digital_db_scale[left_peak * 44 / MAX_PEAK];
 759         num_right_leds = digital_db_scale[right_peak * 44 / MAX_PEAK];
 760     }
 761     else {
 762         num_left_leds = left_peak * 11 / MAX_PEAK;
 763         num_right_leds = right_peak * 11 / MAX_PEAK;
 764     }
 765
 766     num_left_leds = (num_left_leds+last_num_left_leds*vumeter_settings.digital_decay)
 767                     /(vumeter_settings.digital_decay+1);
 768     num_right_leds = (num_right_leds+last_num_right_leds*vumeter_settings.digital_decay)
 769                      /(vumeter_settings.digital_decay+1);
 770
 771     last_num_left_leds = num_left_leds;
 772     last_num_right_leds = num_right_leds;
 773
 774     rb->lcd_set_drawmode(DRMODE_FG);
 775     /* LEDS */
 776     for(i=0; i<num_left_leds; i++) {
 777 #ifdef HAVE_LCD_COLOR
 778         rb->lcd_set_foreground(LCD_RGBPACK(255, 255 - 23 * i, 0));
 779 #endif
 780         rb->lcd_fillrect((digital_lead + (i*digital_block_width)),
 781             14, digital_block_width - digital_block_gap, digital_block_height);
 782     }
 783
 784     for(i=0; i<num_right_leds; i++) {
 785 #ifdef HAVE_LCD_COLOR
 786         rb->lcd_set_foreground(LCD_RGBPACK(255, 255 - 23 * i, 0));
 787 #endif
 788         rb->lcd_fillrect((digital_lead + (i*digital_block_width)),
 789             (half_height + 20), digital_block_width - digital_block_gap,
 790             digital_block_height);
 791     }
 792
 793 #ifdef HAVE_LCD_COLOR
 794     rb->lcd_set_foreground(screen_foreground);
 795 #endif
 796     rb->lcd_set_drawmode(DRMODE_SOLID);
 797
 798     if(vumeter_settings.digital_minimeters)
 799         draw_digital_minimeters();
 800
 801     /* Lines above/below where the LEDS are */
 802     rb->lcd_hline(0,LCD_WIDTH-1,12);
 803     rb->lcd_hline(0,LCD_WIDTH-1,half_height-12);
 804
 805     rb->lcd_hline(0,LCD_WIDTH-1,half_height+18);
 806     rb->lcd_hline(0,LCD_WIDTH-1,LCD_HEIGHT-6);
 807
 808     /* Show Left/Right */
 809     rb->lcd_putsxy(2, half_height-8, "Left");
 810     rb->lcd_putsxy(2, half_height+8, "Right");
 811
 812     /* Line in the middle */
 813     rb->lcd_hline(0,LCD_WIDTH-1,half_height+3);
 814 }
 815
 816 enum plugin_status plugin_start(const void* parameter) {
 817     int button;
 818 #if defined(VUMETER_HELP_PRE) || defined(VUMETER_MENU_PRE)
 819     int lastbutton = BUTTON_NONE;
 820 #endif
 821
 822     (void) parameter;
 823
 824     calc_scales();
 825
 826     load_settings();
 827     rb->lcd_setfont(FONT_SYSFIXED);
 828 #ifdef HAVE_LCD_COLOR
 829     screen_foreground = rb->lcd_get_foreground();
 830 #endif
 831
 832     while (1)
 833     {
 834         rb->lcd_clear_display();
 835
 836         rb->lcd_putsxy(half_width-23, 0, "VU Meter");
 837
 838         if(vumeter_settings.meter_type==ANALOG)
 839             analog_meter();
 840         else
 841             digital_meter();
 842
 843         rb->lcd_update();
 844
 845         button = rb->button_get_w_tmo(1);
 846         switch (button)
 847         {
 848 #ifdef VUMETER_RC_QUIT
 849             case VUMETER_RC_QUIT:
 850 #endif
 851             case VUMETER_QUIT:
 852                 save_settings();
 853                 return PLUGIN_OK;
 854                 break;
 855
 856             case VUMETER_HELP:
 857 #ifdef VUMETER_HELP_PRE
 858                 if (lastbutton != VUMETER_HELP_PRE)
 859                     break;
 860 #endif
 861                 rb->lcd_clear_display();
 862                 rb->lcd_puts(0, 0, LABEL_QUIT ": Exit");
 863                 rb->lcd_puts(0, 1, LABEL_MENU ": Settings");
 864                 rb->lcd_puts(0, 2, LABEL_VOLUME ": Volume");
 865                 rb->lcd_update();
 866                 rb->sleep(HZ*3);
 867                 break;
 868
 869             case VUMETER_MENU:
 870
 871 #ifdef VUMETER_MENU2
 872             case VUMETER_MENU2:
 873 #endif
 874
 875 #ifdef VUMETER_MENU_PRE
 876                 if (lastbutton != VUMETER_MENU_PRE)
 877                     break;
 878 #endif
 879                 if(vu_meter_menu())
 880                     return PLUGIN_OK;
 881                 break;
 882
 883             case VUMETER_UP:
 884             case VUMETER_UP | BUTTON_REPEAT:
 885                 change_volume(1);
 886                 break;
 887
 888             case VUMETER_DOWN:
 889             case VUMETER_DOWN | BUTTON_REPEAT:
 890                 change_volume(-1);
 891                 break;
 892
 893             default:
 894                 if(rb->default_event_handler(button) == SYS_USB_CONNECTED)
 895                     return PLUGIN_USB_CONNECTED;
 896                 break;
 897         }
 898 #if defined(VUMETER_HELP_PRE) || defined(VUMETER_MENU_PRE)
 899         if (button != BUTTON_NONE)
 900             lastbutton = button;
 901 #endif
 902     }
 903 }