apps/plugins/plasma.c

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * $Id$
   9 *
  10 * Plasma demo plugin
  11 *
  12 * My crack at making a 80's style retro plasma effect for the fantastic
  13 * rockbox!
  14 * Okay, I could've hard-coded the sine wave values, I just wanted the
  15 * challange of calculating them! silly: maybe, fun: yes!
  16 *
  17 * This program is free software; you can redistribute it and/or
  18 * modify it under the terms of the GNU General Public License
  19 * as published by the Free Software Foundation; either version 2
  20 * of the License, or (at your option) any later version.
  21 *
  22 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  23 * KIND, either express or implied.
  24 *
  25 ****************************************************************************/
  26
  27 #include "plugin.h"
  28 #include "lib/helper.h"
  29
  30 #ifdef HAVE_LCD_BITMAP
  31
  32 #ifndef HAVE_LCD_COLOR
  33 #include "lib/grey.h"
  34 #endif
  35 #include "lib/fixedpoint.h"
  36
  37 PLUGIN_HEADER
  38
  39 /******************************* Globals ***********************************/
  40
  41 static unsigned char wave_array[256];  /* Pre calculated wave array */
  42 #ifdef HAVE_LCD_COLOR
  43 static fb_data colours[256]; /* Smooth transition of shades */
  44 static int redfactor = 1, greenfactor = 2, bluefactor = 3;
  45 static int redphase = 0, greenphase = 50, bluephase = 100;
  46            /* lower chance of gray at regular intervals */
  47 #else
  48 GREY_INFO_STRUCT
  49 static unsigned char colours[256]; /* Smooth transition of shades */
  50 static unsigned char greybuffer[LCD_HEIGHT*LCD_WIDTH]; /* off screen buffer */
  51 static unsigned char *gbuf;
  52 static size_t        gbuf_size = 0;
  53 #endif
  54 static unsigned char sp1, sp2, sp3, sp4; /* Speed of plasma */
  55 static int plasma_frequency;
  56 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
  57 static bool boosted = false;
  58 #endif
  59
  60 /* Key assignement, all bitmapped models */
  61 #if (CONFIG_KEYPAD == RECORDER_PAD) || (CONFIG_KEYPAD == ONDIO_PAD)
  62 #define PLASMA_QUIT               BUTTON_OFF
  63 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  64 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  65
  66 #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD)
  67 #define PLASMA_QUIT               BUTTON_OFF
  68 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  69 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  70 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
  71 #define PLASMA_RC_QUIT            BUTTON_RC_STOP
  72
  73 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  74       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  75 #define PLASMA_QUIT               BUTTON_MENU
  76 #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_FWD
  77 #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_BACK
  78 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
  79
  80 #elif (CONFIG_KEYPAD == GIGABEAT_PAD)
  81 #define PLASMA_QUIT               BUTTON_POWER
  82 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  83 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  84 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
  85
  86 #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
  87       (CONFIG_KEYPAD == SANSA_C200_PAD) || \
  88       (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \
  89       (CONFIG_KEYPAD == SANSA_M200_PAD)
  90 #define PLASMA_QUIT               BUTTON_POWER
  91 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  92 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  93 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
  94
  95 #elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
  96 #define PLASMA_QUIT               (BUTTON_HOME|BUTTON_REPEAT)
  97 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  98 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  99 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
 100
 101 #elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
 102 #define PLASMA_QUIT               BUTTON_POWER
 103 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 104 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 105 #define PLASMA_REGEN_COLORS       BUTTON_PLAY
 106
 107 #elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
 108 #define PLASMA_QUIT               BUTTON_POWER
 109 #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_UP
 110 #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_DOWN
 111 #define PLASMA_REGEN_COLORS       BUTTON_PLAY
 112
 113 #elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
 114 #define PLASMA_QUIT               BUTTON_BACK
 115 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 116 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 117 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
 118
 119 #elif (CONFIG_KEYPAD == MROBE100_PAD)
 120 #define PLASMA_QUIT               BUTTON_POWER
 121 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 122 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 123
 124 #elif (CONFIG_KEYPAD == IAUDIO_M3_PAD)
 125 #define PLASMA_QUIT               BUTTON_RC_REC
 126 #define PLASMA_INCREASE_FREQUENCY BUTTON_RC_VOL_UP
 127 #define PLASMA_DECREASE_FREQUENCY BUTTON_RC_VOL_DOWN
 128 #define PLASMA_RC_QUIT            BUTTON_REC
 129
 130 #elif (CONFIG_KEYPAD == COWON_D2_PAD)
 131 #define PLASMA_QUIT               BUTTON_POWER
 132
 133 #elif (CONFIG_KEYPAD == IAUDIO67_PAD)
 134 #define PLASMA_QUIT               BUTTON_POWER
 135 #define PLASMA_INCREASE_FREQUENCY BUTTON_RIGHT
 136 #define PLASMA_DECREASE_FREQUENCY BUTTON_LEFT
 137 #define PLASMA_REGEN_COLORS       BUTTON_PLAY
 138 #define PLASMA_RC_QUIT            BUTTON_STOP
 139
 140 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 141 #define PLASMA_QUIT               BUTTON_BACK
 142 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 143 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 144 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
 145
 146 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 147 #define PLASMA_QUIT               BUTTON_POWER
 148 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 149 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 150 #define PLASMA_REGEN_COLORS       BUTTON_SELECT
 151
 152 #elif CONFIG_KEYPAD == PHILIPS_SA9200_PAD
 153 #define PLASMA_QUIT               BUTTON_POWER
 154 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 155 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 156 #define PLASMA_REGEN_COLORS       BUTTON_PLAY
 157
 158 #elif (CONFIG_KEYPAD == ONDAVX747_PAD) || (CONFIG_KEYPAD == ONDAVX777_PAD)
 159 #define PLASMA_QUIT BUTTON_POWER
 160
 161 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 162 #define PLASMA_QUIT               BUTTON_PLAY
 163 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 164 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 165 #define PLASMA_REGEN_COLORS       BUTTON_LEFT
 166
 167 #endif
 168
 169 #ifdef HAVE_TOUCHSCREEN
 170 #ifndef PLASMA_QUIT
 171 #define PLASMA_QUIT               BUTTON_TOPLEFT
 172 #endif
 173 #ifndef PLASMA_INCREASE_FREQUENCY
 174 #define PLASMA_INCREASE_FREQUENCY BUTTON_MIDRIGHT
 175 #endif
 176 #ifndef PLASMA_DECREASE_FREQUENCY
 177 #define PLASMA_DECREASE_FREQUENCY BUTTON_MIDLEFT
 178 #endif
 179 #ifdef HAVE_LCD_COLOR
 180 #ifndef PLASMA_REGEN_COLORS
 181 #define PLASMA_REGEN_COLORS       BUTTON_CENTER
 182 #endif
 183 #endif /* HAVE_LCD_COLOR */
 184 #endif /* HAVE_TOUCHSCREEN */
 185
 186 #define WAV_AMP 90
 187
 188 /*
 189  * Main wave function so we don't have to re-calc the sine
 190  * curve every time. Mess around WAV_AMP and FREQ to make slighlty
 191  * weirder looking plasmas!
 192  */
 193
 194 static void wave_table_generate(void)
 195 {
 196     int i;
 197     for (i=0;i<256;++i)
 198     {
 199         wave_array[i] = (unsigned char)((WAV_AMP
 200                       * (fp14_sin((i * 360 * plasma_frequency) / 256))) / 16384);
 201     }
 202 }
 203
 204 #ifdef HAVE_LCD_COLOR
 205 /* Make a smooth colour cycle. */
 206 void shades_generate(int time)
 207 {
 208     int i;
 209     unsigned red, green, blue;
 210     unsigned r = time * redfactor + redphase;
 211     unsigned g = time * greenfactor + greenphase;
 212     unsigned b = time * bluefactor + bluephase;
 213
 214     for(i=0; i < 256; ++i)
 215     {
 216         r &= 0xFF; g &= 0xFF; b &= 0xFF;
 217
 218         red = 2 * r;
 219         if (red > 255)
 220             red = 510 - red;
 221         green = 2 * g;
 222         if (green > 255)
 223             green = 510 - green;
 224         blue = 2 * b;
 225         if (blue > 255)
 226             blue= 510 - blue;
 227
 228         colours[i] = LCD_RGBPACK(red, green, blue);
 229
 230         r++; g++; b++;
 231     }
 232 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 233     rb->lcd_pal256_update_pal(colours);
 234 #endif
 235 }
 236 #else
 237 /* Make a smooth shade from black into white and back into black again. */
 238 static void shades_generate(void)
 239 {
 240     int i, y;
 241
 242     for(i=0; i < 256; ++i)
 243     {
 244         y = 2 * i;
 245         if (y > 255)
 246             y = 510 - y;
 247         colours[i] = y;
 248     }
 249 }
 250 #endif
 251
 252 void cleanup(void *parameter)
 253 {
 254     (void)parameter;
 255
 256 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 257     if (boosted)
 258         rb->cpu_boost(false);
 259 #endif
 260 #ifndef HAVE_LCD_COLOR
 261     grey_release();
 262 #endif
 263     /* Turn on backlight timeout (revert to settings) */
 264     backlight_use_settings(); /* backlight control in lib/helper.c */
 265 }
 266
 267 /*
 268  * Main function that also contain the main plasma
 269  * algorithm.
 270  */
 271
 272 int main(void)
 273 {
 274     plasma_frequency = 1;
 275     int button, delay, x, y;
 276     unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z,z0;
 277     long last_tick = *rb->current_tick;
 278 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 279     int cumulated_lag = 0;
 280 #endif
 281 #ifdef HAVE_LCD_COLOR
 282 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 283     unsigned char *ptr;
 284 #else
 285     fb_data *ptr;
 286 #endif
 287     int time=0;
 288 #else
 289     unsigned char *ptr;
 290 #endif
 291
 292     /*Generate the neccesary pre calced stuff*/
 293     wave_table_generate();
 294
 295 #ifndef HAVE_LCD_COLOR
 296     shades_generate();  /* statically */
 297
 298     /* get the remainder of the plugin buffer */
 299     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 300
 301     grey_init(gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL);
 302     /* switch on greyscale overlay */
 303     grey_show(true);
 304 #endif
 305     sp1 = 4;
 306     sp2 = 2;
 307     sp3 = 4;
 308     sp4 = 2;
 309     p1=p2=p3=p4=0;
 310     while (true)
 311     {
 312 #ifdef HAVE_LCD_COLOR
 313         shades_generate(time++); /* dynamically */
 314 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 315         ptr = (unsigned char*)rb->lcd_framebuffer;
 316 #else
 317         ptr = rb->lcd_framebuffer;
 318 #endif
 319
 320 #else
 321         ptr = greybuffer;
 322 #endif
 323         t1=p1;
 324         t2=p2;
 325         for(y = 0; y < LCD_HEIGHT; ++y)
 326         {
 327             t3=p3;
 328             t4=p4;
 329             z0 = wave_array[t1] + wave_array[t2];
 330             for(x = 0; x < LCD_WIDTH; ++x)
 331             {
 332                 z = z0 + wave_array[t3] + wave_array[t4];
 333 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 334                 *ptr++ = z;
 335 #else
 336                 *ptr++ = colours[z];
 337 #endif
 338                 t3+=1;
 339                 t4+=2;
 340             }
 341             t1+=2;
 342             t2+=1;
 343             rb->yield();
 344         }
 345         p1+=sp1;
 346         p2-=sp2;
 347         p3+=sp3;
 348         p4-=sp4;
 349 #ifdef HAVE_LCD_COLOR
 350 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 351         rb->lcd_blit_pal256(    (unsigned char*)rb->lcd_framebuffer,
 352                                 0,0,0,0,LCD_WIDTH,LCD_HEIGHT);
 353 #else
 354         rb->lcd_update();
 355 #endif
 356 #else
 357         grey_ub_gray_bitmap(greybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
 358 #endif
 359
 360         delay = last_tick - *rb->current_tick + HZ/33;
 361 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 362         if (!boosted && delay < 0)
 363         {
 364             cumulated_lag -= delay;     /* proportional increase */
 365             if (cumulated_lag >= HZ)
 366                 rb->cpu_boost(boosted = true);
 367         }
 368         else if (boosted && delay > 1)  /* account for jitter */
 369         {
 370             if (--cumulated_lag <= 0)   /* slow decrease */
 371                 rb->cpu_boost(boosted = false);
 372         }
 373 #endif
 374         button = rb->button_get_w_tmo(MAX(0, delay));
 375         last_tick = *rb->current_tick;
 376
 377         switch(button)
 378         {
 379 #ifdef PLASMA_RC_QUIT
 380             case PLASMA_RC_QUIT:
 381 #endif
 382             case(PLASMA_QUIT):
 383                 cleanup(NULL);
 384                 return PLUGIN_OK;
 385                 break;
 386
 387             case (PLASMA_INCREASE_FREQUENCY):
 388                 ++plasma_frequency;
 389                 wave_table_generate();
 390                 break;
 391
 392             case (PLASMA_DECREASE_FREQUENCY):
 393                 if(plasma_frequency>1)
 394                 {
 395                     --plasma_frequency;
 396                     wave_table_generate();
 397                 }
 398                 break;
 399 #ifdef HAVE_LCD_COLOR
 400             case (PLASMA_REGEN_COLORS):
 401                 redfactor=rb->rand()%4;
 402                 greenfactor=rb->rand()%4;
 403                 bluefactor=rb->rand()%4;
 404                 redphase=rb->rand()%256;
 405                 greenphase=rb->rand()%256;
 406                 bluephase=rb->rand()%256;
 407                 break;
 408 #endif
 409
 410             default:
 411                 if (rb->default_event_handler_ex(button, cleanup, NULL)
 412                     == SYS_USB_CONNECTED)
 413                     return PLUGIN_USB_CONNECTED;
 414                 break;
 415         }
 416     }
 417 }
 418
 419 /*************************** Plugin entry point ****************************/
 420
 421 enum plugin_status plugin_start(const void* parameter)
 422 {
 423     int ret;
 424
 425     (void)parameter;
 426 #if LCD_DEPTH > 1
 427     rb->lcd_set_backdrop(NULL);
 428 #endif
 429     /* Turn off backlight timeout */
 430     backlight_force_on(); /* backlight control in lib/helper.c */
 431
 432 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 433     rb->lcd_set_mode(LCD_MODE_PAL256);
 434 #endif
 435
 436     ret = main();
 437
 438 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 439     rb->lcd_set_mode(LCD_MODE_RGB565);
 440 #endif
 441
 442     return ret;
 443 }
 444
 445 #endif /* HAVE_LCD_BITMAP */