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 (CONFIG_KEYPAD == SANSA_C200_PAD)
  62 #define STARFIELD_QUIT BUTTON_POWER
  63 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  64 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  65 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  66 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  67 #define STARFIELD_TOGGLE_COLOR BUTTON_SELECT
  68
  69 #else
  70 #define STARFIELD_QUIT BUTTON_OFF
  71 #define STARFIELD_INCREASE_ZMOVE BUTTON_UP
  72 #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN
  73 #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT
  74 #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT
  75 #ifdef BUTTON_SELECT
  76 #define STARFIELD_TOGGLE_COLOR BUTTON_SELECT
  77 #else
  78 #define STARFIELD_TOGGLE_COLOR BUTTON_PLAY
  79 #endif
  80 #if (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD)
  81 #define STARFIELD_RC_QUIT BUTTON_RC_STOP
  82 #endif
  83
  84 #endif
  85
  86 #define LCD_CENTER_X (LCD_WIDTH/2)
  87 #define LCD_CENTER_Y (LCD_HEIGHT/2)
  88 #define Z_MAX_DIST 100
  89
  90
  91 #define MAX_STARS (LCD_WIDTH*LCD_HEIGHT*20)/100
  92 #define INIT_STARS 200
  93 #define STARFIELD_INCREASE_STEP 50
  94 #define INIT_SPACE_SPEED 1
  95 #define STAR_MAX_VELOCITY 2
  96 /*
  97  * max 3d coord in the 2d screen :
  98  * example with x
  99  *  x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...)
 100  * so
 101  *  max_x2d=max_x3d/max_z+LCD_CENTER_X
 102  *  max_x3d=(max_x2d-LCD_CENTER_X)*max_z
 103  * with
 104  *  max_x2d = LCD_WIDTH
 105  *  max_z = Z_MAX_DIST
 106  * we have now
 107  * max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST
 108  * max_x3d=LCD_CENTER_X*Z_MAX_DIST
 109  */
 110
 111 #define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST
 112 #define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST
 113
 114 #define MSG_DISP_TIME 30
 115
 116 static struct plugin_api* rb; /* global api struct pointer */
 117
 118 /*
 119  * Each star's stuffs
 120  */
 121 struct star
 122 {
 123     int x,y,z;
 124     int velocity;
 125 #ifdef HAVE_LCD_COLOR
 126     int color;
 127 #endif
 128 };
 129
 130 static inline void star_init(struct star * star, int z_move, bool color)
 131 {
 132     star->velocity=rb->rand() % STAR_MAX_VELOCITY+1;
 133     /* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */
 134     star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X;
 135     star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y;
 136 #ifdef HAVE_LCD_COLOR
 137     if(color)
 138         star->color=LCD_RGBPACK(rb->rand()%128+128,rb->rand()%128+128,
 139                                 rb->rand()%128+128);
 140     else
 141         star->color=LCD_WHITE;
 142 #else
 143     (void)color;
 144 #endif
 145     if(z_move>=0)
 146         star->z=Z_MAX_DIST;
 147     else
 148         star->z=rb->rand() %Z_MAX_DIST/2+1;
 149 }
 150
 151 static inline void star_move(struct star * star, int z_move, bool color)
 152 {
 153     star->z -= z_move*star->velocity;
 154     if (star->z <= 0 || star->z > Z_MAX_DIST)
 155         star_init(star, z_move, color);
 156 }
 157
 158 static inline void star_draw(struct star * star, int z_move, bool color)
 159 {
 160     int x_draw, y_draw;
 161     /*
 162      * 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem)
 163      * we put the star in the center of the screen
 164      */
 165     x_draw = star->x / star->z + LCD_CENTER_X;
 166     if (x_draw < 1 || x_draw >= LCD_WIDTH)
 167     {
 168         star_init(star, z_move, color);
 169         return;
 170     }
 171     y_draw  = star->y / star->z + LCD_CENTER_Y;
 172     if (y_draw < 1 || y_draw >= LCD_HEIGHT)
 173     {
 174         star_init(star, z_move, color);
 175         return;
 176     }
 177
 178 #ifdef HAVE_LCD_COLOR
 179     rb->lcd_set_foreground(star->color);
 180 #endif
 181
 182     rb->lcd_drawpixel(x_draw, y_draw);
 183     if(star->z<5*Z_MAX_DIST/6)
 184     {
 185         rb->lcd_drawpixel(x_draw, y_draw - 1);
 186         rb->lcd_drawpixel(x_draw - 1, y_draw);
 187         if(star->z<Z_MAX_DIST/2)
 188         {
 189             rb->lcd_drawpixel(x_draw + 1, y_draw);
 190             rb->lcd_drawpixel(x_draw, y_draw + 1);
 191         }
 192     }
 193 }
 194
 195 /*
 196  * Whole starfield operations
 197  */
 198 struct starfield
 199 {
 200     struct star tab[MAX_STARS];
 201     int nb_stars;
 202     int z_move;
 203     bool color;
 204 };
 205
 206 static inline void starfield_init(struct starfield * starfield)
 207 {
 208     starfield->nb_stars=0;
 209     starfield->z_move=INIT_SPACE_SPEED;
 210     starfield->color=false;
 211 }
 212
 213 static inline void starfield_add_stars(struct starfield * starfield,
 214                                        int nb_to_add)
 215 {
 216     int i, old_nb_stars;
 217     old_nb_stars=starfield->nb_stars;
 218     starfield->nb_stars+=nb_to_add;
 219
 220     if(starfield->nb_stars > MAX_STARS)
 221         starfield->nb_stars=MAX_STARS;
 222
 223     for( i=old_nb_stars ; i < starfield->nb_stars ; ++i )
 224     {
 225         star_init( &(starfield->tab[i]), starfield->z_move, starfield->color );
 226     }
 227 }
 228
 229 static inline void starfield_del_stars(struct starfield * starfield,
 230                                        int nb_to_add)
 231 {
 232     starfield->nb_stars-=nb_to_add;
 233     if(starfield->nb_stars<0)
 234         starfield->nb_stars=0;
 235 }
 236
 237 static inline void starfield_move_and_draw(struct starfield * starfield)
 238 {
 239     int i;
 240     for(i=0;i<starfield->nb_stars;++i)
 241     {
 242         star_move(&(starfield->tab[i]), starfield->z_move, starfield->color);
 243         star_draw(&(starfield->tab[i]), starfield->z_move, starfield->color);
 244     }
 245 }
 246
 247 static struct starfield starfield;
 248
 249 int plugin_main(void)
 250 {
 251     char str_buffer[40];
 252     int button, avg_peak, t_disp=0;
 253     int font_h, font_w;
 254     bool pulse=true;
 255     rb->lcd_getstringsize("A", &font_w, &font_h);
 256     starfield_init(&starfield);
 257     starfield_add_stars(&starfield, INIT_STARS);
 258
 259 #if LCD_DEPTH > 1
 260      rb->lcd_set_backdrop(NULL);
 261 #endif
 262 #ifdef HAVE_LCD_COLOR
 263     rb->lcd_set_background(LCD_BLACK);
 264     rb->lcd_set_foreground(LCD_WHITE);
 265 #endif
 266
 267     while (true)
 268     {
 269         rb->sleep(1);
 270         rb->lcd_clear_display();
 271
 272 #if ((CONFIG_CODEC == SWCODEC)  || !defined(SIMULATOR) && \
 273     ((CONFIG_CODEC == MAS3587F) || (CONFIG_CODEC == MAS3539F)))
 274
 275         /* This will make the stars pulse to the music */
 276         if(pulse==true){
 277
 278             /* Get the peaks. ( Borrowed from vu_meter ) */
 279 #if (CONFIG_CODEC == SWCODEC)
 280             int left_peak, right_peak;
 281             rb->pcm_calculate_peaks(&left_peak, &right_peak);
 282 #else
 283             int left_peak = rb->mas_codec_readreg(0xC);
 284             int right_peak = rb->mas_codec_readreg(0xD);
 285 #endif
 286             /* Devide peak data by 4098 to bring the max
 287                value down from ~32k to 8 */
 288             left_peak  =    left_peak/0x1000;
 289             right_peak =    right_peak/0x1000;
 290
 291             /* Make sure they dont stop */
 292             if(left_peak<0x1)
 293                 left_peak     = 0x1;
 294             if(right_peak<0x1)
 295                 right_peak    = 0x1;
 296
 297             /* And make sure they dont go over 8 */
 298             if(left_peak>0x8)
 299                 left_peak     = 0x8;
 300             if(right_peak>0x8)
 301                 right_peak    = 0x8;
 302
 303             /* We need the average of both chanels */
 304             avg_peak     = ( left_peak + right_peak )/2;
 305
 306             /* Set the speed to the peak meter */
 307             starfield.z_move = avg_peak;
 308
 309         } /* if pulse */
 310 #else
 311         (void) avg_peak;
 312 #endif
 313         starfield_move_and_draw(&starfield);
 314
 315 #ifdef HAVE_LCD_COLOR
 316             rb->lcd_set_foreground(LCD_WHITE);
 317 #endif
 318
 319         /* if a parameter is updated (by the user), we must print it */
 320         if (t_disp > 0)
 321         {
 322             --t_disp;
 323             rb->snprintf(str_buffer, sizeof(str_buffer),
 324                          "star:%d speed:%d",
 325                          starfield.nb_stars,
 326                          starfield.z_move);
 327 #if LCD_DEPTH > 1
 328             rb->lcd_set_foreground(LCD_WHITE);
 329 #endif
 330             rb->lcd_putsxy(0, LCD_HEIGHT-font_h, str_buffer);
 331         }
 332         rb->lcd_update();
 333
 334         button = rb->button_get(false);
 335         switch(button)
 336         {
 337             case (STARFIELD_INCREASE_ZMOVE):
 338             case (STARFIELD_INCREASE_ZMOVE | BUTTON_REPEAT):
 339                 ++(starfield.z_move);
 340                 pulse=false;
 341                 t_disp=MSG_DISP_TIME;
 342                 break;
 343             case (STARFIELD_DECREASE_ZMOVE):
 344             case (STARFIELD_DECREASE_ZMOVE | BUTTON_REPEAT):
 345                 --(starfield.z_move);
 346                 pulse=false;
 347                 t_disp=MSG_DISP_TIME;
 348                 break;
 349             case(STARFIELD_INCREASE_NB_STARS):
 350             case(STARFIELD_INCREASE_NB_STARS | BUTTON_REPEAT):
 351                 starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP);
 352                 t_disp=MSG_DISP_TIME;
 353                 break;
 354             case(STARFIELD_DECREASE_NB_STARS):
 355             case(STARFIELD_DECREASE_NB_STARS | BUTTON_REPEAT):
 356                 starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP);
 357                 t_disp=MSG_DISP_TIME;
 358                 break;
 359 #ifdef HAVE_LCD_COLOR
 360             case(STARFIELD_TOGGLE_COLOR):
 361                 starfield.color=!starfield.color;
 362                 break;
 363 #endif
 364 #ifdef STARFIELD_RC_QUIT
 365             case STARFIELD_RC_QUIT:
 366 #endif
 367             case(STARFIELD_QUIT):
 368             case(SYS_USB_CONNECTED):
 369                 /* Turn on backlight timeout (revert to settings) */
 370                 backlight_use_settings(rb); /* backlight control in lib/helper.c*/
 371                 return PLUGIN_OK;
 372                 break;
 373         }
 374     }
 375 }
 376
 377 /*************************** Plugin entry point ****************************/
 378
 379 enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
 380 {
 381     int ret;
 382
 383     rb = api; /* copy to global api pointer */
 384     (void)parameter;
 385     /* Turn off backlight timeout */
 386     backlight_force_on(rb); /* backlight control in lib/helper.c */
 387
 388     ret = plugin_main();
 389
 390     return ret;
 391 }
 392
 393 #endif /* #ifdef HAVE_LCD_BITMAP */