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