/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * Copyright (C) 2005 Kevin Ferrare * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "plugin.h" #include "lib/helper.h" #include "lib/pluginlib_exit.h" #include "lib/pluginlib_actions.h" /******************************* Globals ***********************************/ /* this set the context to use with PLA */ static const struct button_mapping *plugin_contexts[] = { pla_main_ctx }; /* Key assignement */ #define STARFIELD_QUIT PLA_EXIT #define STARFIELD_QUIT2 PLA_CANCEL #define STARFIELD_INCREASE_ZMOVE PLA_UP #define STARFIELD_INCREASE_ZMOVE_REPEAT PLA_UP_REPEAT #define STARFIELD_DECREASE_ZMOVE PLA_DOWN #define STARFIELD_DECREASE_ZMOVE_REPEAT PLA_DOWN_REPEAT #define STARFIELD_INCREASE_NB_STARS PLA_RIGHT #define STARFIELD_INCREASE_NB_STARS_REPEAT PLA_RIGHT_REPEAT #define STARFIELD_DECREASE_NB_STARS PLA_LEFT #define STARFIELD_DECREASE_NB_STARS_REPEAT PLA_LEFT_REPEAT #define STARFIELD_TOGGLE_COLOR PLA_SELECT #define LCD_CENTER_X (LCD_WIDTH/2) #define LCD_CENTER_Y (LCD_HEIGHT/2) #define Z_MAX_DIST 100 #define MAX_STARS (LCD_WIDTH*LCD_HEIGHT*20)/100 #define INIT_STARS 200 #define STARFIELD_INCREASE_STEP 50 #define INIT_SPACE_SPEED 1 #define STAR_MAX_VELOCITY 2 /* * max 3d coord in the 2d screen : * example with x * x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...) * so * max_x2d=max_x3d/max_z+LCD_CENTER_X * max_x3d=(max_x2d-LCD_CENTER_X)*max_z * with * max_x2d = LCD_WIDTH * max_z = Z_MAX_DIST * we have now * max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST * max_x3d=LCD_CENTER_X*Z_MAX_DIST */ #define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST #define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST #define MSG_DISP_TIME 30 /* * Each star's stuffs */ struct star { int x,y,z; int velocity; #ifdef HAVE_LCD_COLOR int color; #endif }; static inline void star_init(struct star * star, int z_move, bool color) { star->velocity=rb->rand() % STAR_MAX_VELOCITY+1; /* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */ star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X; star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y; #ifdef HAVE_LCD_COLOR if(color) star->color=LCD_RGBPACK(rb->rand()%128+128,rb->rand()%128+128, rb->rand()%128+128); else star->color=LCD_WHITE; #else (void)color; #endif if(z_move>=0) star->z=Z_MAX_DIST; else star->z=rb->rand() %Z_MAX_DIST/2+1; } static inline void star_move(struct star * star, int z_move, bool color) { star->z -= z_move*star->velocity; if (star->z <= 0 || star->z > Z_MAX_DIST) star_init(star, z_move, color); } static inline void star_draw(struct star * star, int z_move, bool color) { int x_draw, y_draw; /* * 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem) * we put the star in the center of the screen */ x_draw = star->x / star->z + LCD_CENTER_X; if (x_draw < 1 || x_draw >= LCD_WIDTH) { star_init(star, z_move, color); return; } y_draw = star->y / star->z + LCD_CENTER_Y; if (y_draw < 1 || y_draw >= LCD_HEIGHT) { star_init(star, z_move, color); return; } #ifdef HAVE_LCD_COLOR rb->lcd_set_foreground(star->color); #endif rb->lcd_drawpixel(x_draw, y_draw); if(star->z<5*Z_MAX_DIST/6) { rb->lcd_drawpixel(x_draw, y_draw - 1); rb->lcd_drawpixel(x_draw - 1, y_draw); if(star->zlcd_drawpixel(x_draw + 1, y_draw); rb->lcd_drawpixel(x_draw, y_draw + 1); } } } /* * Whole starfield operations */ struct starfield { struct star tab[MAX_STARS]; int nb_stars; int z_move; bool color; }; static inline void starfield_init(struct starfield * starfield) { starfield->nb_stars=0; starfield->z_move=INIT_SPACE_SPEED; starfield->color=false; } static inline void starfield_add_stars(struct starfield * starfield, int nb_to_add) { int i, old_nb_stars; old_nb_stars=starfield->nb_stars; starfield->nb_stars+=nb_to_add; if(starfield->nb_stars > MAX_STARS) starfield->nb_stars=MAX_STARS; for( i=old_nb_stars ; i < starfield->nb_stars ; ++i ) { star_init( &(starfield->tab[i]), starfield->z_move, starfield->color ); } } static inline void starfield_del_stars(struct starfield * starfield, int nb_to_add) { starfield->nb_stars-=nb_to_add; if(starfield->nb_stars<0) starfield->nb_stars=0; } static inline void starfield_move_and_draw(struct starfield * starfield) { int i; for(i=0;inb_stars;++i) { star_move(&(starfield->tab[i]), starfield->z_move, starfield->color); star_draw(&(starfield->tab[i]), starfield->z_move, starfield->color); } } static struct starfield starfield; static int plugin_main(void) { int button, avg_peak, t_disp=0; int font_h, font_w; bool pulse __attribute__ ((unused)) = true; /* 'unused' resolves warnings */ rb->lcd_getstringsize("A", &font_w, &font_h); starfield_init(&starfield); starfield_add_stars(&starfield, INIT_STARS); #if LCD_DEPTH > 1 rb->lcd_set_backdrop(NULL); #endif #ifdef HAVE_LCD_COLOR rb->lcd_set_background(LCD_BLACK); rb->lcd_set_foreground(LCD_WHITE); #endif while (true) { rb->sleep(1); rb->lcd_clear_display(); /* This will make the stars pulse to the music */ if(pulse){ /* Get the peaks. ( Borrowed from vu_meter ) */ static struct pcm_peaks peaks; rb->mixer_channel_calculate_peaks(PCM_MIXER_CHAN_PLAYBACK, &peaks); #define left_peak peaks.left #define right_peak peaks.right /* Devide peak data by 4098 to bring the max value down from ~32k to 8 */ left_peak = left_peak/0x1000; right_peak = right_peak/0x1000; /* Make sure they dont stop */ if(left_peak<0x1) left_peak = 0x1; if(right_peak<0x1) right_peak = 0x1; /* And make sure they dont go over 8 */ if(left_peak>0x8) left_peak = 0x8; if(right_peak>0x8) right_peak = 0x8; /* We need the average of both chanels */ avg_peak = ( left_peak + right_peak )/2; /* Set the speed to the peak meter */ starfield.z_move = avg_peak; } /* if pulse */ starfield_move_and_draw(&starfield); #ifdef HAVE_LCD_COLOR rb->lcd_set_foreground(LCD_WHITE); #endif /* if a parameter is updated (by the user), we must print it */ if (t_disp > 0) { --t_disp; #ifdef HAVE_LCD_COLOR rb->lcd_set_foreground(LCD_WHITE); #endif rb->lcd_putsxyf(0, LCD_HEIGHT-font_h, "star:%d speed:%d", starfield.nb_stars, starfield.z_move); } rb->lcd_update(); /*We get button from PLA this way */ button = pluginlib_getaction(TIMEOUT_NOBLOCK, plugin_contexts, ARRAYLEN(plugin_contexts)); switch(button) { case (STARFIELD_INCREASE_ZMOVE): case (STARFIELD_INCREASE_ZMOVE_REPEAT): ++(starfield.z_move); pulse=false; t_disp=MSG_DISP_TIME; break; case (STARFIELD_DECREASE_ZMOVE): case (STARFIELD_DECREASE_ZMOVE_REPEAT): --(starfield.z_move); pulse=false; t_disp=MSG_DISP_TIME; break; case(STARFIELD_INCREASE_NB_STARS): case(STARFIELD_INCREASE_NB_STARS_REPEAT): starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP); t_disp=MSG_DISP_TIME; break; case(STARFIELD_DECREASE_NB_STARS): case(STARFIELD_DECREASE_NB_STARS_REPEAT): starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP); t_disp=MSG_DISP_TIME; break; #ifdef HAVE_LCD_COLOR case(STARFIELD_TOGGLE_COLOR): starfield.color=!starfield.color; break; #endif case(STARFIELD_QUIT): case(STARFIELD_QUIT2): return PLUGIN_OK; break; default: exit_on_usb(button); break; } } } /*************************** Plugin entry point ****************************/ enum plugin_status plugin_start(const void* parameter) { int ret; (void)parameter; #ifdef HAVE_BACKLIGHT /* Turn off backlight timeout */ backlight_ignore_timeout(); #endif ret = plugin_main(); #ifdef HAVE_BACKLIGHT /* Turn on backlight timeout (revert to settings) */ backlight_use_settings(); #endif return ret; }