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