/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * $Id$ * * Plasma demo plugin * * My crack at making a 80's style retro plasma effect for the fantastic * rockbox! * Okay, I could've hard-coded the sine wave values, I just wanted the * challange of calculating them! silly: maybe, fun: yes! * * 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" #ifdef HAVE_LCD_BITMAP #ifndef HAVE_LCD_COLOR #include "lib/grey.h" #endif #include "lib/fixedpoint.h" PLUGIN_HEADER /******************************* Globals ***********************************/ static unsigned char wave_array[256]; /* Pre calculated wave array */ #ifdef HAVE_LCD_COLOR static fb_data colours[256]; /* Smooth transition of shades */ static int redfactor = 1, greenfactor = 2, bluefactor = 3; static int redphase = 0, greenphase = 50, bluephase = 100; /* lower chance of gray at regular intervals */ #else GREY_INFO_STRUCT static unsigned char colours[256]; /* Smooth transition of shades */ static unsigned char greybuffer[LCD_HEIGHT*LCD_WIDTH]; /* off screen buffer */ static unsigned char *gbuf; static size_t gbuf_size = 0; #endif static unsigned char sp1, sp2, sp3, sp4; /* Speed of plasma */ static int plasma_frequency; /* Key assignement, all bitmapped models */ #if (CONFIG_KEYPAD == IPOD_4G_PAD) || (CONFIG_KEYPAD == IPOD_3G_PAD) || \ (CONFIG_KEYPAD == IPOD_1G2G_PAD) #define PLASMA_QUIT BUTTON_MENU #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_FWD #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_BACK #elif (CONFIG_KEYPAD == GIGABEAT_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \ (CONFIG_KEYPAD == SANSA_C200_PAD) || \ (CONFIG_KEYPAD == SANSA_CLIP_PAD) || \ (CONFIG_KEYPAD == SANSA_M200_PAD) || \ (CONFIG_KEYPAD == SANSA_FUZE_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #elif (CONFIG_KEYPAD == IRIVER_H10_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_SCROLL_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_SCROLL_DOWN #elif (CONFIG_KEYPAD == GIGABEAT_S_PAD) #define PLASMA_QUIT BUTTON_BACK #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #elif (CONFIG_KEYPAD == MROBE100_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #elif (CONFIG_KEYPAD == IAUDIO_M3_PAD) #define PLASMA_QUIT BUTTON_RC_REC #define PLASMA_INCREASE_FREQUENCY BUTTON_RC_VOL_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_RC_VOL_DOWN #define PLASMA_RC_QUIT BUTTON_REC #elif (CONFIG_KEYPAD == COWOND2_PAD) #define PLASMA_QUIT BUTTON_POWER #elif (CONFIG_KEYPAD == IAUDIO67_PAD) #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_RIGHT #define PLASMA_DECREASE_FREQUENCY BUTTON_LEFT #define PLASMA_RC_QUIT BUTTON_STOP #define PLASMA_REGEN_COLORS BUTTON_PLAY #elif CONFIG_KEYPAD == CREATIVEZVM_PAD #define PLASMA_QUIT BUTTON_BACK #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #define PLASMA_REGEN_COLORS BUTTON_SELECT #elif CONFIG_KEYPAD == PHILIPS_HDD1630_PAD #define PLASMA_QUIT BUTTON_POWER #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #define PLASMA_REGEN_COLORS BUTTON_SELECT #endif #ifdef HAVE_TOUCHSCREEN #ifndef PLASMA_QUIT #define PLASMA_QUIT BUTTON_TOPLEFT #endif #ifndef PLASMA_INCREASE_FREQUENCY #define PLASMA_INCREASE_FREQUENCY BUTTON_MIDRIGHT #endif #ifndef PLASMA_DECREASE_FREQUENCY #define PLASMA_DECREASE_FREQUENCY BUTTON_MIDLEFT #endif #endif /* HAVE_TOUCHSCREEN */ #ifndef PLASMA_QUIT #define PLASMA_QUIT BUTTON_OFF #endif #ifndef PLASMA_INCREASE_FREQUENCY #define PLASMA_INCREASE_FREQUENCY BUTTON_UP #endif #ifndef PLASMA_DECREASE_FREQUENCY #define PLASMA_DECREASE_FREQUENCY BUTTON_DOWN #endif #if (CONFIG_KEYPAD == IRIVER_H100_PAD) || (CONFIG_KEYPAD == IRIVER_H300_PAD) #define PLASMA_RC_QUIT BUTTON_RC_STOP #endif /* FIXME: cleanup */ #ifdef HAVE_LCD_COLOR #if CONFIG_KEYPAD == IAUDIO_X5M5_PAD #define PLASMA_REGEN_COLORS BUTTON_PLAY #elif CONFIG_KEYPAD == IRIVER_H10_PAD #define PLASMA_REGEN_COLORS BUTTON_PLAY #elif (CONFIG_KEYPAD == SANSA_E200_PAD) || \ (CONFIG_KEYPAD == SANSA_C200_PAD) || \ (CONFIG_KEYPAD == SANSA_FUZE_PAD) #define PLASMA_REGEN_COLORS BUTTON_SELECT #elif CONFIG_KEYPAD == IPOD_4G_PAD #define PLASMA_REGEN_COLORS BUTTON_SELECT #elif CONFIG_KEYPAD == IRIVER_H300_PAD #define PLASMA_REGEN_COLORS BUTTON_SELECT #elif CONFIG_KEYPAD == GIGABEAT_PAD #define PLASMA_REGEN_COLORS BUTTON_SELECT #elif CONFIG_KEYPAD == GIGABEAT_S_PAD #define PLASMA_REGEN_COLORS BUTTON_SELECT #endif #ifdef HAVE_TOUCHSCREEN #ifndef PLASMA_REGEN_COLORS #define PLASMA_REGEN_COLORS BUTTON_CENTER #endif #endif /* HAVE_TOUCHSCREEN */ #endif /* HAVE_LCD_COLOR */ #define WAV_AMP 90 /* * Main wave function so we don't have to re-calc the sine * curve every time. Mess around WAV_AMP and FREQ to make slighlty * weirder looking plasmas! */ static void wave_table_generate(void) { int i; for (i=0;i<256;++i) { wave_array[i] = (unsigned char)((WAV_AMP * (sin_int((i * 360 * plasma_frequency) / 256))) / 16384); } } #ifdef HAVE_LCD_COLOR /* Make a smooth colour cycle. */ void shades_generate(int time) { int i; unsigned red, green, blue; unsigned r = time * redfactor + redphase; unsigned g = time * greenfactor + greenphase; unsigned b = time * bluefactor + bluephase; for(i=0; i < 256; ++i) { r &= 0xFF; g &= 0xFF; b &= 0xFF; red = 2 * r; if (red > 255) red = 510 - red; green = 2 * g; if (green > 255) green = 510 - green; blue = 2 * b; if (blue > 255) blue= 510 - blue; colours[i] = LCD_RGBPACK(red, green, blue); r++; g++; b++; } } #else /* Make a smooth shade from black into white and back into black again. */ static void shades_generate(void) { int i, y; for(i=0; i < 256; ++i) { y = 2 * i; if (y > 255) y = 510 - y; colours[i] = y; } } #endif void cleanup(void *parameter) { (void)parameter; #ifndef HAVE_LCD_COLOR grey_release(); #endif /* Turn on backlight timeout (revert to settings) */ backlight_use_settings(); /* backlight control in lib/helper.c */ } /* * Main function that also contain the main plasma * algorithm. */ int main(void) { plasma_frequency = 1; int button, x, y; unsigned char p1,p2,p3,p4,t1,t2,t3,t4, z; #ifdef HAVE_LCD_COLOR fb_data *ptr; int time=0; #else unsigned char *ptr; #endif /*Generate the neccesary pre calced stuff*/ wave_table_generate(); #ifndef HAVE_LCD_COLOR shades_generate(); /* statically */ /* get the remainder of the plugin buffer */ gbuf = (unsigned char *) rb->plugin_get_buffer(&gbuf_size); grey_init(gbuf, gbuf_size, GREY_ON_COP, LCD_WIDTH, LCD_HEIGHT, NULL); /* switch on greyscale overlay */ grey_show(true); #endif sp1 = 4; sp2 = 2; sp3 = 4; sp4 = 2; p1=p2=p3=p4=0; while (true) { #ifdef HAVE_LCD_COLOR shades_generate(time++); /* dynamically */ ptr = rb->lcd_framebuffer; #else ptr = greybuffer; #endif t1=p1; t2=p2; for(y = 0; y < LCD_HEIGHT; ++y) { t3=p3; t4=p4; for(x = 0; x < LCD_WIDTH; ++x) { z = wave_array[t1] + wave_array[t2] + wave_array[t3] + wave_array[t4]; *ptr++ = colours[z]; t3+=1; t4+=2; } t1+=2; t2+=1; rb->yield(); } p1+=sp1; p2-=sp2; p3+=sp3; p4-=sp4; #ifdef HAVE_LCD_COLOR rb->lcd_update(); #else grey_ub_gray_bitmap(greybuffer, 0, 0, LCD_WIDTH, LCD_HEIGHT); #endif button = rb->button_get(false); switch(button) { #ifdef PLASMA_RC_QUIT case PLASMA_RC_QUIT: #endif case(PLASMA_QUIT): cleanup(NULL); return PLUGIN_OK; break; case (PLASMA_INCREASE_FREQUENCY): ++plasma_frequency; wave_table_generate(); break; case (PLASMA_DECREASE_FREQUENCY): if(plasma_frequency>1) { --plasma_frequency; wave_table_generate(); } break; #ifdef HAVE_LCD_COLOR case (PLASMA_REGEN_COLORS): redfactor=rb->rand()%4; greenfactor=rb->rand()%4; bluefactor=rb->rand()%4; redphase=rb->rand()%256; greenphase=rb->rand()%256; bluephase=rb->rand()%256; break; #endif default: if (rb->default_event_handler_ex(button, cleanup, NULL) == SYS_USB_CONNECTED) return PLUGIN_USB_CONNECTED; break; } } } /*************************** Plugin entry point ****************************/ enum plugin_status plugin_start(const void* parameter) { int ret; (void)parameter; #if LCD_DEPTH > 1 rb->lcd_set_backdrop(NULL); #endif /* Turn off backlight timeout */ backlight_force_on(); /* backlight control in lib/helper.c */ ret = main(); return ret; } #endif /* HAVE_LCD_BITMAP */