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 #elif CONFIG_KEYPAD == PBELL_VIBE500_PAD
 168 #define PLASMA_QUIT               BUTTON_REC
 169 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 170 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 171 #define PLASMA_REGEN_COLORS       BUTTON_PLAY
 172
 173 #endif
 174
 175 #ifdef HAVE_TOUCHSCREEN
 176 #ifndef PLASMA_QUIT
 177 #define PLASMA_QUIT               BUTTON_TOPLEFT
 178 #endif
 179 #ifndef PLASMA_INCREASE_FREQUENCY
 180 #define PLASMA_INCREASE_FREQUENCY BUTTON_MIDRIGHT
 181 #endif
 182 #ifndef PLASMA_DECREASE_FREQUENCY
 183 #define PLASMA_DECREASE_FREQUENCY BUTTON_MIDLEFT
 184 #endif
 185 #ifdef HAVE_LCD_COLOR
 186 #ifndef PLASMA_REGEN_COLORS
 187 #define PLASMA_REGEN_COLORS       BUTTON_CENTER
 188 #endif
 189 #endif /* HAVE_LCD_COLOR */
 190 #endif /* HAVE_TOUCHSCREEN */
 191
 192 #define WAV_AMP 90
 193
 194 /*
 195  * Main wave function so we don't have to re-calc the sine
 196  * curve every time. Mess around WAV_AMP and FREQ to make slighlty
 197  * weirder looking plasmas!
 198  */
 199
 200 static void wave_table_generate(void)
 201 {
 202     int i;
 203     for (i=0;i<256;++i)
 204     {
 205         wave_array[i] = (unsigned char)((WAV_AMP
 206                       * (fp14_sin((i * 360 * plasma_frequency) / 256))) / 16384);
 207     }
 208 }
 209
 210 #ifdef HAVE_LCD_COLOR
 211 /* Make a smooth colour cycle. */
 212 void shades_generate(int time)
 213 {
 214     int i;
 215     unsigned red, green, blue;
 216     unsigned r = time * redfactor + redphase;
 217     unsigned g = time * greenfactor + greenphase;
 218     unsigned b = time * bluefactor + bluephase;
 219
 220     for(i=0; i < 256; ++i)
 221     {
 222         r &= 0xFF; g &= 0xFF; b &= 0xFF;
 223
 224         red = 2 * r;
 225         if (red > 255)
 226             red = 510 - red;
 227         green = 2 * g;
 228         if (green > 255)
 229             green = 510 - green;
 230         blue = 2 * b;
 231         if (blue > 255)
 232             blue= 510 - blue;
 233
 234         colours[i] = LCD_RGBPACK(red, green, blue);
 235
 236         r++; g++; b++;
 237     }
 238 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 239     rb->lcd_pal256_update_pal(colours);
 240 #endif
 241 }
 242 #else
 243 /* Make a smooth shade from black into white and back into black again. */
 244 static void shades_generate(void)
 245 {
 246     int i, y;
 247
 248     for(i=0; i < 256; ++i)
 249     {
 250         y = 2 * i;
 251         if (y > 255)
 252             y = 510 - y;
 253         colours[i] = y;
 254     }
 255 }
 256 #endif
 257
 258 void cleanup(void *parameter)
 259 {
 260     (void)parameter;
 261
 262 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 263     if (boosted)
 264         rb->cpu_boost(false);
 265 #endif
 266 #ifndef HAVE_LCD_COLOR
 267     grey_release();
 268 #endif
 269     /* Turn on backlight timeout (revert to settings) */
 270     backlight_use_settings(); /* backlight control in lib/helper.c */
 271 }
 272
 273 /*
 274  * Main function that also contain the main plasma
 275  * algorithm.
 276  */
 277
 278 int main(void)
 279 {
 280     plasma_frequency = 1;
 281     int button, delay, x, y;
 282     unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z,z0;
 283     long last_tick = *rb->current_tick;
 284 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 285     int cumulated_lag = 0;
 286 #endif
 287 #ifdef HAVE_LCD_COLOR
 288 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 289     unsigned char *ptr;
 290 #else
 291     fb_data *ptr;
 292 #endif
 293     int time=0;
 294 #else
 295     unsigned char *ptr;
 296 #endif
 297
 298     /*Generate the neccesary pre calced stuff*/
 299     wave_table_generate();
 300
 301 #ifndef HAVE_LCD_COLOR
 302     shades_generate();  /* statically */
 303
 304     /* get the remainder of the plugin buffer */
 305     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 306
 307     grey_init(gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL);
 308     /* switch on greyscale overlay */
 309     grey_show(true);
 310 #endif
 311     sp1 = 4;
 312     sp2 = 2;
 313     sp3 = 4;
 314     sp4 = 2;
 315     p1=p2=p3=p4=0;
 316     while (true)
 317     {
 318 #ifdef HAVE_LCD_COLOR
 319         shades_generate(time++); /* dynamically */
 320 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 321         ptr = (unsigned char*)rb->lcd_framebuffer;
 322 #else
 323         ptr = rb->lcd_framebuffer;
 324 #endif
 325
 326 #else
 327         ptr = greybuffer;
 328 #endif
 329         t1=p1;
 330         t2=p2;
 331         for(y = 0; y < LCD_HEIGHT; ++y)
 332         {
 333             t3=p3;
 334             t4=p4;
 335             z0 = wave_array[t1] + wave_array[t2];
 336             for(x = 0; x < LCD_WIDTH; ++x)
 337             {
 338                 z = z0 + wave_array[t3] + wave_array[t4];
 339 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 340                 *ptr++ = z;
 341 #else
 342                 *ptr++ = colours[z];
 343 #endif
 344                 t3+=1;
 345                 t4+=2;
 346             }
 347             t1+=2;
 348             t2+=1;
 349             rb->yield();
 350         }
 351         p1+=sp1;
 352         p2-=sp2;
 353         p3+=sp3;
 354         p4-=sp4;
 355 #ifdef HAVE_LCD_COLOR
 356 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 357         rb->lcd_blit_pal256(    (unsigned char*)rb->lcd_framebuffer,
 358                                 0,0,0,0,LCD_WIDTH,LCD_HEIGHT);
 359 #else
 360         rb->lcd_update();
 361 #endif
 362 #else
 363         grey_ub_gray_bitmap(greybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
 364 #endif
 365
 366         delay = last_tick - *rb->current_tick + HZ/33;
 367 #ifdef HAVE_ADJUSTABLE_CPU_FREQ
 368         if (!boosted && delay < 0)
 369         {
 370             cumulated_lag -= delay;     /* proportional increase */
 371             if (cumulated_lag >= HZ)
 372                 rb->cpu_boost(boosted = true);
 373         }
 374         else if (boosted && delay > 1)  /* account for jitter */
 375         {
 376             if (--cumulated_lag <= 0)   /* slow decrease */
 377                 rb->cpu_boost(boosted = false);
 378         }
 379 #endif
 380         button = rb->button_get_w_tmo(MAX(0, delay));
 381         last_tick = *rb->current_tick;
 382
 383         switch(button)
 384         {
 385 #ifdef PLASMA_RC_QUIT
 386             case PLASMA_RC_QUIT:
 387 #endif
 388             case(PLASMA_QUIT):
 389                 cleanup(NULL);
 390                 return PLUGIN_OK;
 391                 break;
 392
 393             case (PLASMA_INCREASE_FREQUENCY):
 394                 ++plasma_frequency;
 395                 wave_table_generate();
 396                 break;
 397
 398             case (PLASMA_DECREASE_FREQUENCY):
 399                 if(plasma_frequency>1)
 400                 {
 401                     --plasma_frequency;
 402                     wave_table_generate();
 403                 }
 404                 break;
 405 #ifdef HAVE_LCD_COLOR
 406             case (PLASMA_REGEN_COLORS):
 407                 redfactor=rb->rand()%4;
 408                 greenfactor=rb->rand()%4;
 409                 bluefactor=rb->rand()%4;
 410                 redphase=rb->rand()%256;
 411                 greenphase=rb->rand()%256;
 412                 bluephase=rb->rand()%256;
 413                 break;
 414 #endif
 415
 416             default:
 417                 if (rb->default_event_handler_ex(button, cleanup, NULL)
 418                     == SYS_USB_CONNECTED)
 419                     return PLUGIN_USB_CONNECTED;
 420                 break;
 421         }
 422     }
 423 }
 424
 425 /*************************** Plugin entry point ****************************/
 426
 427 enum plugin_status plugin_start(const void* parameter)
 428 {
 429     int ret;
 430
 431     (void)parameter;
 432 #if LCD_DEPTH > 1
 433     rb->lcd_set_backdrop(NULL);
 434 #endif
 435     /* Turn off backlight timeout */
 436     backlight_force_on(); /* backlight control in lib/helper.c */
 437
 438 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 439     rb->lcd_set_mode(LCD_MODE_PAL256);
 440 #endif
 441
 442     ret = main();
 443
 444 #if defined(HAVE_LCD_MODES) && (HAVE_LCD_MODES & LCD_MODE_PAL256)
 445     rb->lcd_set_mode(LCD_MODE_RGB565);
 446 #endif
 447
 448     return ret;
 449 }
 450
 451 #endif /* HAVE_LCD_BITMAP */