apps/plugins/starfield.c

   1 /***************************************************************************
   2 *             __________               __   ___.
   3 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7 *                     \/            \/     \/    \/            \/
   8 * Copyright (C) 2005 Kevin Ferrare
   9 *
  10 * All files in this archive are subject to the GNU General Public License.
  11 * See the file COPYING in the source tree root for full license agreement.
  12 *
  13 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  14 * KIND, either express or implied.
  15 *
  16 ****************************************************************************/
  17
  18 #include "plugin.h"
  19 #include "helper.h"
  20
  21 #ifdef HAVE_LCD_BITMAP /* and also not for the Player */
  22
  23 PLUGIN_HEADER
  24
  25 /******************************* Globals ***********************************/
  26
  27 static struct plugin_api* rb; /* global api struct pointer */
  28
  29 /* Key assignement */
  30 #if (CONFIG_KEYPAD == IPOD_4G_PAD) || \
  31     (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  32     (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  33 #define STARFIELD_QUIT BUTTON_MENU
  34 #define STARFIELD_INCREASE_ZMOVE BUTTON_SCROLL_FWD
  35 #define STARFIELD_DECREASE_ZMOVE BUTTON_SCROLL_BACK
  36 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  37 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  38 #define STARFIELD_TOGGLE_COLOR BUTTON_PLAY
  39 #elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
  40 #define STARFIELD_QUIT BUTTON_POWER
  41 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  42 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  43 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  44 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  45 #define STARFIELD_TOGGLE_COLOR BUTTON_PLAY
  46 #elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
  47 #define STARFIELD_QUIT BUTTON_POWER
  48 #define STARFIELD_INCREASE_ZMOVE BUTTON_SCROLL_UP
  49 #define STARFIELD_DECREASE_ZMOVE BUTTON_SCROLL_DOWN
  50 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  51 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  52 #define STARFIELD_TOGGLE_COLOR BUTTON_PLAY
  53 #elif (CONFIG_KEYPAD == GIGABEAT_PAD)
  54 #define STARFIELD_QUIT BUTTON_POWER
  55 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  56 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  57 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  58 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  59 #define STARFIELD_TOGGLE_COLOR BUTTON_SELECT
  60 #elif (CONFIG_KEYPAD == SANSA_E200_PAD)
  61 #define STARFIELD_QUIT BUTTON_POWER
  62 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  63 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  64 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  65 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  66 #define STARFIELD_TOGGLE_COLOR BUTTON_SELECT
  67
  68 #else
  69 #define STARFIELD_QUIT BUTTON_OFF
  70 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  71 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  72 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  73 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  74 #ifdef BUTTON_SELECT
  75 #define STARFIELD_TOGGLE_COLOR BUTTON_SELECT
  76 #else
  77 #define STARFIELD_TOGGLE_COLOR BUTTON_PLAY
  78 #endif
  79 #if (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD)
  80 #define STARFIELD_RC_QUIT BUTTON_RC_STOP
  81 #endif
  82
  83 #endif
  84
  85 #define LCD_CENTER_X (LCD_WIDTH/2)
  86 #define LCD_CENTER_Y (LCD_HEIGHT/2)
  87 #define Z_MAX_DIST 100
  88
  89
  90 #define MAX_STARS (LCD_WIDTH*LCD_HEIGHT*20)/100
  91 #define INIT_STARS 200
  92 #define STARFIELD_INCREASE_STEP 50
  93 #define INIT_SPACE_SPEED 1
  94 #define STAR_MAX_VELOCITY 2
  95 /*
  96  * max 3d coord in the 2d screen :
  97  * example with x
  98  *  x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...)
  99  * so
 100  *  max_x2d=max_x3d/max_z+LCD_CENTER_X
 101  *  max_x3d=(max_x2d-LCD_CENTER_X)*max_z
 102  * with
 103  *  max_x2d = LCD_WIDTH
 104  *  max_z = Z_MAX_DIST
 105  * we have now
 106  * max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST
 107  * max_x3d=LCD_CENTER_X*Z_MAX_DIST
 108  */
 109
 110 #define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST
 111 #define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST
 112
 113 #define MSG_DISP_TIME 30
 114
 115 static struct plugin_api* rb; /* global api struct pointer */
 116
 117 /*
 118  * Each star's stuffs
 119  */
 120 struct star
 121 {
 122     int x,y,z;
 123     int velocity;
 124 #ifdef HAVE_LCD_COLOR
 125     int color;
 126 #endif
 127 };
 128
 129 static inline void star_init(struct star * star, int z_move, bool color)
 130 {
 131     star->velocity=rb->rand() % STAR_MAX_VELOCITY+1;
 132     /* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */
 133     star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X;
 134     star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y;
 135 #ifdef HAVE_LCD_COLOR
 136     if(color)
 137         star->color=LCD_RGBPACK(rb->rand()%128+128,rb->rand()%128+128,
 138                                 rb->rand()%128+128);
 139     else
 140         star->color=LCD_WHITE;
 141 #else
 142     (void)color;
 143 #endif
 144     if(z_move>=0)
 145         star->z=Z_MAX_DIST;
 146     else
 147         star->z=rb->rand() %Z_MAX_DIST/2+1;
 148 }
 149
 150 static inline void star_move(struct star * star, int z_move, bool color)
 151 {
 152     star->z -= z_move*star->velocity;
 153     if (star->z <= 0 || star->z > Z_MAX_DIST)
 154         star_init(star, z_move, color);
 155 }
 156
 157 static inline void star_draw(struct star * star, int z_move, bool color)
 158 {
 159     int x_draw, y_draw;
 160     /*
 161      * 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem)
 162      * we put the star in the center of the screen
 163      */
 164     x_draw = star->x / star->z + LCD_CENTER_X;
 165     if (x_draw < 1 || x_draw >= LCD_WIDTH)
 166     {
 167         star_init(star, z_move, color);
 168         return;
 169     }
 170     y_draw  = star->y / star->z + LCD_CENTER_Y;
 171     if (y_draw < 1 || y_draw >= LCD_HEIGHT)
 172     {
 173         star_init(star, z_move, color);
 174         return;
 175     }
 176
 177 #ifdef HAVE_LCD_COLOR
 178     rb->lcd_set_foreground(star->color);
 179 #endif
 180
 181     rb->lcd_drawpixel(x_draw, y_draw);
 182     if(star->z<5*Z_MAX_DIST/6)
 183     {
 184         rb->lcd_drawpixel(x_draw, y_draw - 1);
 185         rb->lcd_drawpixel(x_draw - 1, y_draw);
 186         if(star->z<Z_MAX_DIST/2)
 187         {
 188             rb->lcd_drawpixel(x_draw + 1, y_draw);
 189             rb->lcd_drawpixel(x_draw, y_draw + 1);
 190         }
 191     }
 192 }
 193
 194 /*
 195  * Whole starfield operations
 196  */
 197 struct starfield
 198 {
 199     struct star tab[MAX_STARS];
 200     int nb_stars;
 201     int z_move;
 202     bool color;
 203 };
 204
 205 static inline void starfield_init(struct starfield * starfield)
 206 {
 207     starfield->nb_stars=0;
 208     starfield->z_move=INIT_SPACE_SPEED;
 209     starfield->color=false;
 210 }
 211
 212 static inline void starfield_add_stars(struct starfield * starfield,
 213                                        int nb_to_add)
 214 {
 215     int i, old_nb_stars;
 216     old_nb_stars=starfield->nb_stars;
 217     starfield->nb_stars+=nb_to_add;
 218
 219     if(starfield->nb_stars > MAX_STARS)
 220         starfield->nb_stars=MAX_STARS;
 221
 222     for( i=old_nb_stars ; i < starfield->nb_stars ; ++i )
 223     {
 224         star_init( &(starfield->tab[i]), starfield->z_move, starfield->color );
 225     }
 226 }
 227
 228 static inline void starfield_del_stars(struct starfield * starfield,
 229                                        int nb_to_add)
 230 {
 231     starfield->nb_stars-=nb_to_add;
 232     if(starfield->nb_stars<0)
 233         starfield->nb_stars=0;
 234 }
 235
 236 static inline void starfield_move_and_draw(struct starfield * starfield)
 237 {
 238     int i;
 239     for(i=0;i<starfield->nb_stars;++i)
 240     {
 241         star_move(&(starfield->tab[i]), starfield->z_move, starfield->color);
 242         star_draw(&(starfield->tab[i]), starfield->z_move, starfield->color);
 243     }
 244 }
 245
 246 static struct starfield starfield;
 247
 248 int plugin_main(void)
 249 {
 250     char str_buffer[40];
 251     int button, avg_peak, t_disp=0;
 252     int font_h, font_w;
 253     bool pulse=true;
 254     rb->lcd_getstringsize("A", &font_w, &font_h);
 255     starfield_init(&starfield);
 256     starfield_add_stars(&starfield, INIT_STARS);
 257
 258 #if LCD_DEPTH > 1
 259      rb->lcd_set_backdrop(NULL);
 260 #endif
 261 #ifdef HAVE_LCD_COLOR
 262     rb->lcd_set_background(LCD_BLACK);
 263     rb->lcd_set_foreground(LCD_WHITE);
 264 #endif
 265
 266     while (true)
 267     {
 268         rb->sleep(1);
 269         rb->lcd_clear_display();
 270
 271 #if ((CONFIG_CODEC == SWCODEC)  || !defined(SIMULATOR) && \
 272     ((CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)))
 273
 274         /* This will make the stars pulse to the music */
 275         if(pulse==true){
 276
 277             /* Get the peaks. ( Borrowed from vu_meter ) */
 278 #if (CONFIG_CODEC == SWCODEC)
 279             int left_peak, right_peak;
 280             rb->pcm_calculate_peaks(&left_peak, &right_peak);
 281 #else
 282             int left_peak = rb->mas_codec_readreg(0xC);
 283             int right_peak = rb->mas_codec_readreg(0xD);
 284 #endif
 285             /* Devide peak data by 4098 to bring the max
 286                value down from ~32k to 8 */
 287             left_peak  =    left_peak/0x1000;
 288             right_peak =    right_peak/0x1000;
 289
 290             /* Make sure they dont stop */
 291             if(left_peak<0x1)
 292                 left_peak     = 0x1;
 293             if(right_peak<0x1)
 294                 right_peak    = 0x1;
 295
 296             /* And make sure they dont go over 8 */
 297             if(left_peak>0x8)
 298                 left_peak     = 0x8;
 299             if(right_peak>0x8)
 300                 right_peak    = 0x8;
 301
 302             /* We need the average of both chanels */
 303             avg_peak     = ( left_peak + right_peak )/2;
 304
 305             /* Set the speed to the peak meter */
 306             starfield.z_move = avg_peak;
 307
 308         } /* if pulse */
 309 #else
 310         (void) avg_peak;
 311 #endif
 312         starfield_move_and_draw(&starfield);
 313
 314 #ifdef HAVE_LCD_COLOR
 315             rb->lcd_set_foreground(LCD_WHITE);
 316 #endif
 317
 318         /* if a parameter is updated (by the user), we must print it */
 319         if (t_disp > 0)
 320         {
 321             --t_disp;
 322             rb->snprintf(str_buffer, sizeof(str_buffer),
 323                          "star:%d speed:%d",
 324                          starfield.nb_stars,
 325                          starfield.z_move);
 326 #if LCD_DEPTH > 1
 327             rb->lcd_set_foreground(LCD_WHITE);
 328 #endif
 329             rb->lcd_putsxy(0, LCD_HEIGHT-font_h, str_buffer);
 330         }
 331         rb->lcd_update();
 332
 333         button = rb->button_get(false);
 334         switch(button)
 335         {
 336             case (STARFIELD_INCREASE_ZMOVE):
 337             case (STARFIELD_INCREASE_ZMOVE | BUTTON_REPEAT):
 338                 ++(starfield.z_move);
 339                 pulse=false;
 340                 t_disp=MSG_DISP_TIME;
 341                 break;
 342             case (STARFIELD_DECREASE_ZMOVE):
 343             case (STARFIELD_DECREASE_ZMOVE | BUTTON_REPEAT):
 344                 --(starfield.z_move);
 345                 pulse=false;
 346                 t_disp=MSG_DISP_TIME;
 347                 break;
 348             case(STARFIELD_INCREASE_NB_STARS):
 349             case(STARFIELD_INCREASE_NB_STARS | BUTTON_REPEAT):
 350                 starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP);
 351                 t_disp=MSG_DISP_TIME;
 352                 break;
 353             case(STARFIELD_DECREASE_NB_STARS):
 354             case(STARFIELD_DECREASE_NB_STARS | BUTTON_REPEAT):
 355                 starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP);
 356                 t_disp=MSG_DISP_TIME;
 357                 break;
 358 #ifdef HAVE_LCD_COLOR
 359             case(STARFIELD_TOGGLE_COLOR):
 360                 starfield.color=!starfield.color;
 361                 break;
 362 #endif
 363 #ifdef STARFIELD_RC_QUIT
 364             case STARFIELD_RC_QUIT:
 365 #endif
 366             case(STARFIELD_QUIT):
 367             case(SYS_USB_CONNECTED):
 368                 /* Turn on backlight timeout (revert to settings) */
 369                 backlight_use_settings(rb); /* backlight control in lib/helper.c*/
 370                 return PLUGIN_OK;
 371                 break;
 372         }
 373     }
 374 }
 375
 376 /*************************** Plugin entry point ****************************/
 377
 378 enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
 379 {
 380     int ret;
 381
 382     rb = api; /* copy to global api pointer */
 383     (void)parameter;
 384     /* Turn off backlight timeout */
 385     backlight_force_on(rb); /* backlight control in lib/helper.c */
 386
 387     ret = plugin_main();
 388
 389     return ret;
 390 }
 391
 392 #endif /* #ifdef HAVE_LCD_BITMAP */