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
  57 /* Key assignement, all bitmapped models */
  58 #if (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  59     (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  60 #define PLASMA_QUIT BUTTON_MENU
  61 #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_FWD
  62 #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_BACK
  63
  64 #elif (CONFIG_KEYPAD == GIGABEAT_PAD)
  65 #define PLASMA_QUIT BUTTON_POWER
  66 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  67 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  68
  69 #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
  70       (CONFIG_KEYPAD == SANSA_C200_PAD) || \
  71       (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \
  72       (CONFIG_KEYPAD == SANSA_M200_PAD)
  73 #define PLASMA_QUIT BUTTON_POWER
  74 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  75 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  76
  77 #elif (CONFIG_KEYPAD == SANSA_FUZE_PAD)
  78 #define PLASMA_QUIT (BUTTON_HOME|BUTTON_REPEAT)
  79 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  80 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  81
  82 #elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
  83 #define PLASMA_QUIT BUTTON_POWER
  84 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  85 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  86
  87 #elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
  88 #define PLASMA_QUIT BUTTON_POWER
  89 #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_UP
  90 #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_DOWN
  91
  92 #elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
  93 #define PLASMA_QUIT BUTTON_BACK
  94 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
  95 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
  96
  97 #elif (CONFIG_KEYPAD == MROBE100_PAD)
  98 #define PLASMA_QUIT BUTTON_POWER
  99 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 100 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 101
 102 #elif (CONFIG_KEYPAD == IAUDIO_M3_PAD)
 103 #define PLASMA_QUIT BUTTON_RC_REC
 104 #define PLASMA_INCREASE_FREQUENCY BUTTON_RC_VOL_UP
 105 #define PLASMA_DECREASE_FREQUENCY BUTTON_RC_VOL_DOWN
 106 #define PLASMA_RC_QUIT            BUTTON_REC
 107
 108 #elif (CONFIG_KEYPAD == COWOND2_PAD)
 109 #define PLASMA_QUIT BUTTON_POWER
 110
 111 #elif (CONFIG_KEYPAD == IAUDIO67_PAD)
 112 #define PLASMA_QUIT BUTTON_POWER
 113 #define PLASMA_INCREASE_FREQUENCY BUTTON_RIGHT
 114 #define PLASMA_DECREASE_FREQUENCY BUTTON_LEFT
 115 #define PLASMA_RC_QUIT            BUTTON_STOP
 116 #define PLASMA_REGEN_COLORS BUTTON_PLAY
 117
 118 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 119 #define PLASMA_QUIT BUTTON_BACK
 120 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 121 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 122 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 123
 124 #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD
 125 #define PLASMA_QUIT BUTTON_POWER
 126 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 127 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 128 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 129
 130 #elif (CONFIG_KEYPAD == ONDAVX747_PAD)
 131 #define PLASMA_QUIT BUTTON_POWER
 132
 133 #elif CONFIG_KEYPAD == SAMSUNG_YH_PAD
 134 #define PLASMA_QUIT               BUTTON_PLAY
 135 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 136 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 137 #define PLASMA_REGEN_COLORS       BUTTON_LEFT
 138
 139 #endif
 140
 141 #ifdef HAVE_TOUCHSCREEN
 142 #ifndef PLASMA_QUIT
 143 #define PLASMA_QUIT               BUTTON_TOPLEFT
 144 #endif
 145 #ifndef PLASMA_INCREASE_FREQUENCY
 146 #define PLASMA_INCREASE_FREQUENCY BUTTON_MIDRIGHT
 147 #endif
 148 #ifndef PLASMA_DECREASE_FREQUENCY
 149 #define PLASMA_DECREASE_FREQUENCY BUTTON_MIDLEFT
 150 #endif
 151 #endif /* HAVE_TOUCHSCREEN */
 152
 153 #ifndef PLASMA_QUIT
 154 #define PLASMA_QUIT               BUTTON_OFF
 155 #endif
 156 #ifndef PLASMA_INCREASE_FREQUENCY
 157 #define PLASMA_INCREASE_FREQUENCY BUTTON_UP
 158 #endif
 159 #ifndef PLASMA_DECREASE_FREQUENCY
 160 #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN
 161 #endif
 162
 163 #if (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD)
 164 #define PLASMA_RC_QUIT            BUTTON_RC_STOP
 165 #endif
 166
 167 /* FIXME: cleanup */
 168 #ifdef HAVE_LCD_COLOR
 169 #if CONFIG_KEYPAD == IAUDIO_X5M5_PAD
 170 #define PLASMA_REGEN_COLORS BUTTON_PLAY
 171 #elif CONFIG_KEYPAD == IRIVER_H10_PAD
 172 #define PLASMA_REGEN_COLORS BUTTON_PLAY
 173 #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \
 174 (CONFIG_KEYPAD == SANSA_C200_PAD) || \
 175 (CONFIG_KEYPAD == SANSA_FUZE_PAD)
 176 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 177 #elif CONFIG_KEYPAD == IPOD_4G_PAD
 178 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 179 #elif CONFIG_KEYPAD == IRIVER_H300_PAD
 180 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 181 #elif CONFIG_KEYPAD == GIGABEAT_PAD
 182 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 183 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 184 #define PLASMA_REGEN_COLORS BUTTON_SELECT
 185 #endif
 186 #ifdef HAVE_TOUCHSCREEN
 187 #ifndef PLASMA_REGEN_COLORS
 188 #define PLASMA_REGEN_COLORS BUTTON_CENTER
 189 #endif
 190 #endif /* HAVE_TOUCHSCREEN */
 191 #endif /* HAVE_LCD_COLOR */
 192
 193 #define WAV_AMP 90
 194
 195 /*
 196  * Main wave function so we don't have to re-calc the sine
 197  * curve every time. Mess around WAV_AMP and FREQ to make slighlty
 198  * weirder looking plasmas!
 199  */
 200
 201 static void wave_table_generate(void)
 202 {
 203     int i;
 204     for (i=0;i<256;++i)
 205     {
 206         wave_array[i] = (unsigned char)((WAV_AMP
 207                       * (fp14_sin((i * 360 * plasma_frequency) / 256))) / 16384);
 208     }
 209 }
 210
 211 #ifdef HAVE_LCD_COLOR
 212 /* Make a smooth colour cycle. */
 213 void shades_generate(int time)
 214 {
 215     int i;
 216     unsigned red, green, blue;
 217     unsigned r = time * redfactor + redphase;
 218     unsigned g = time * greenfactor + greenphase;
 219     unsigned b = time * bluefactor + bluephase;
 220
 221     for(i=0; i < 256; ++i)
 222     {
 223         r &= 0xFF; g &= 0xFF; b &= 0xFF;
 224
 225         red = 2 * r;
 226         if (red > 255)
 227             red = 510 - red;
 228         green = 2 * g;
 229         if (green > 255)
 230             green = 510 - green;
 231         blue = 2 * b;
 232         if (blue > 255)
 233             blue= 510 - blue;
 234
 235         colours[i] = LCD_RGBPACK(red, green, blue);
 236
 237         r++; g++; b++;
 238     }
 239 }
 240 #else
 241 /* Make a smooth shade from black into white and back into black again. */
 242 static void shades_generate(void)
 243 {
 244     int i, y;
 245
 246     for(i=0; i < 256; ++i)
 247     {
 248         y = 2 * i;
 249         if (y > 255)
 250             y = 510 - y;
 251         colours[i] = y;
 252     }
 253 }
 254 #endif
 255
 256 static void cleanup(UNUSED_ATTR void *parameter)
 257 {
 258
 259 #ifndef HAVE_LCD_COLOR
 260     grey_release();
 261 #endif
 262     /* Turn on backlight timeout (revert to settings) */
 263     backlight_use_settings(); /* backlight control in lib/helper.c */
 264 }
 265
 266 /*
 267  * Main function that also contain the main plasma
 268  * algorithm.
 269  */
 270
 271 int main(void)
 272 {
 273     plasma_frequency = 1;
 274     int button, x, y;
 275     unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z;
 276 #ifdef HAVE_LCD_COLOR
 277     fb_data *ptr;
 278     int time=0;
 279 #else
 280     unsigned char *ptr;
 281 #endif
 282
 283     /*Generate the neccesary pre calced stuff*/
 284     wave_table_generate();
 285
 286 #ifndef HAVE_LCD_COLOR
 287     shades_generate();  /* statically */
 288
 289     /* get the remainder of the plugin buffer */
 290     gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size);
 291
 292     grey_init(gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL);
 293     /* switch on greyscale overlay */
 294     grey_show(true);
 295 #endif
 296     sp1 = 4;
 297     sp2 = 2;
 298     sp3 = 4;
 299     sp4 = 2;
 300     p1=p2=p3=p4=0;
 301     while (true)
 302     {
 303 #ifdef HAVE_LCD_COLOR
 304         shades_generate(time++); /* dynamically */
 305         ptr = rb->lcd_framebuffer;
 306 #else
 307         ptr = greybuffer;
 308 #endif
 309         t1=p1;
 310         t2=p2;
 311         for(y = 0; y < LCD_HEIGHT; ++y)
 312         {
 313             t3=p3;
 314             t4=p4;
 315             for(x = 0; x < LCD_WIDTH; ++x)
 316             {
 317                 z = wave_array[t1] + wave_array[t2] + wave_array[t3]
 318                   + wave_array[t4];
 319                 *ptr++ = colours[z];
 320                 t3+=1;
 321                 t4+=2;
 322             }
 323             t1+=2;
 324             t2+=1;
 325             rb->yield();
 326         }
 327         p1+=sp1;
 328         p2-=sp2;
 329         p3+=sp3;
 330         p4-=sp4;
 331 #ifdef HAVE_LCD_COLOR
 332         rb->lcd_update();
 333 #else
 334         grey_ub_gray_bitmap(greybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT);
 335 #endif
 336
 337         button = rb->button_get(false);
 338
 339         switch(button)
 340         {
 341 #ifdef PLASMA_RC_QUIT
 342             case PLASMA_RC_QUIT:
 343 #endif
 344             case(PLASMA_QUIT):
 345                 cleanup(NULL);
 346                 return PLUGIN_OK;
 347                 break;
 348
 349             case (PLASMA_INCREASE_FREQUENCY):
 350                 ++plasma_frequency;
 351                 wave_table_generate();
 352                 break;
 353
 354             case (PLASMA_DECREASE_FREQUENCY):
 355                 if(plasma_frequency>1)
 356                 {
 357                     --plasma_frequency;
 358                     wave_table_generate();
 359                 }
 360                 break;
 361 #ifdef HAVE_LCD_COLOR
 362             case (PLASMA_REGEN_COLORS):
 363                 redfactor=rb->rand()%4;
 364                 greenfactor=rb->rand()%4;
 365                 bluefactor=rb->rand()%4;
 366                 redphase=rb->rand()%256;
 367                 greenphase=rb->rand()%256;
 368                 bluephase=rb->rand()%256;
 369                 break;
 370 #endif
 371
 372             default:
 373                 if (rb->default_event_handler_ex(button, cleanup, NULL)
 374                     == SYS_USB_CONNECTED)
 375                     return PLUGIN_USB_CONNECTED;
 376                 break;
 377         }
 378     }
 379 }
 380
 381 /*************************** Plugin entry point ****************************/
 382
 383 enum plugin_status plugin_start(UNUSED_ATTR const void* parameter)
 384 {
 385     int ret;
 386
 387 #if LCD_DEPTH > 1
 388     rb->lcd_set_backdrop(NULL);
 389 #endif
 390     /* Turn off backlight timeout */
 391     backlight_force_on(); /* backlight control in lib/helper.c */
 392
 393     ret = main();
 394
 395     return ret;
 396 }
 397
 398 #endif /* HAVE_LCD_BITMAP */