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