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Add visualizer

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A generic visualizer that supports animations. There's a few
predefined keyframe types included, and more can be added by the
user.
This commit is contained in:
Fred Sundvik 2016-02-13 19:38:23 +02:00
parent 01b955aa64
commit 9e58d022ba
3 changed files with 472 additions and 1 deletions
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visualizer.c Normal file
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/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "visualizer.h"
#include "ch.h"
#include <string.h>
#ifdef LCD_ENABLE
#include "gfx.h"
#endif
#ifdef LCD_BACKLIGHT_ENABLE
#include "lcd_backlight.h"
#endif
//#define DEBUG_VISUALIZER
#ifdef DEBUG_VISUALIZER
#include "debug.h"
#else
#include "nodebug.h"
#endif
static visualizer_keyboard_status_t current_status = {
.layer = 0xFFFFFFFF,
.default_layer = 0xFFFFFFFF,
.leds = 0xFFFFFFFF,
};
static bool same_status(visualizer_keyboard_status_t* status1, visualizer_keyboard_status_t* status2) {
return memcmp(status1, status2, sizeof(visualizer_keyboard_status_t)) == 0;
}
static event_source_t layer_changed_event;
static bool visualizer_enabled = false;
#define MAX_SIMULTANEOUS_ANIMATIONS 4
static keyframe_animation_t* animations[MAX_SIMULTANEOUS_ANIMATIONS] = {};
void start_keyframe_animation(keyframe_animation_t* animation) {
animation->current_frame = -1;
animation->time_left_in_frame = 0;
animation->need_update = true;
int free_index = -1;
for (int i=0;i<MAX_SIMULTANEOUS_ANIMATIONS;i++) {
if (animations[i] == animation) {
return;
}
if (free_index == -1 && animations[i] == NULL) {
free_index=i;
}
}
if (free_index!=-1) {
animations[free_index] = animation;
}
}
void stop_keyframe_animation(keyframe_animation_t* animation) {
animation->current_frame = animation->num_frames;
animation->time_left_in_frame = 0;
animation->need_update = true;
for (int i=0;i<MAX_SIMULTANEOUS_ANIMATIONS;i++) {
if (animations[i] == animation) {
animations[i] = NULL;
return;
}
}
}
static bool update_keyframe_animation(keyframe_animation_t* animation, visualizer_state_t* state, systime_t delta, systime_t* sleep_time) {
dprintf("Animation frame%d, left %d, delta %d\n", animation->current_frame,
animation->time_left_in_frame, delta);
if (animation->current_frame == animation->num_frames) {
animation->need_update = false;
return false;
}
if (animation->current_frame == -1) {
animation->current_frame = 0;
animation->time_left_in_frame = animation->frame_lengths[0];
animation->need_update = true;
} else {
animation->time_left_in_frame -= delta;
while (animation->time_left_in_frame <= 0) {
int left = animation->time_left_in_frame;
if (animation->need_update) {
animation->time_left_in_frame = 0;
(*animation->frame_functions[animation->current_frame])(animation, state);
}
animation->current_frame++;
animation->need_update = true;
if (animation->current_frame == animation->num_frames) {
if (animation->loop) {
animation->current_frame = 0;
}
else {
stop_keyframe_animation(animation);
return false;
}
}
delta = -left;
animation->time_left_in_frame = animation->frame_lengths[animation->current_frame];
animation->time_left_in_frame -= delta;
}
}
if (animation->need_update) {
animation->need_update = (*animation->frame_functions[animation->current_frame])(animation, state);
}
int wanted_sleep = animation->need_update ? 10 : animation->time_left_in_frame;
if ((unsigned)wanted_sleep < *sleep_time) {
*sleep_time = wanted_sleep;
}
return true;
}
bool keyframe_no_operation(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
(void)state;
return false;
}
#ifdef LCD_BACKLIGHT_ENABLE
bool keyframe_animate_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state) {
int frame_length = animation->frame_lengths[1];
int current_pos = frame_length - animation->time_left_in_frame;
uint8_t t_h = LCD_HUE(state->target_lcd_color);
uint8_t t_s = LCD_SAT(state->target_lcd_color);
uint8_t t_i = LCD_INT(state->target_lcd_color);
uint8_t p_h = LCD_HUE(state->prev_lcd_color);
uint8_t p_s = LCD_SAT(state->prev_lcd_color);
uint8_t p_i = LCD_INT(state->prev_lcd_color);
uint8_t d_h1 = t_h - p_h; //Modulo arithmetic since we want to wrap around
int d_h2 = t_h - p_h;
// Chose the shortest way around
int d_h = abs(d_h2) < d_h1 ? d_h2 : d_h1;
int d_s = t_s - p_s;
int d_i = t_i - p_i;
int hue = (d_h * current_pos) / frame_length;
int sat = (d_s * current_pos) / frame_length;
int intensity = (d_i * current_pos) / frame_length;
//dprintf("%X -> %X = %X\n", p_h, t_h, hue);
hue += p_h;
sat += p_s;
intensity += p_i;
state->current_lcd_color = LCD_COLOR(hue, sat, intensity);
lcd_backlight_color(
LCD_HUE(state->current_lcd_color),
LCD_SAT(state->current_lcd_color),
LCD_INT(state->current_lcd_color));
return true;
}
bool keyframe_set_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
state->prev_lcd_color = state->target_lcd_color;
state->current_lcd_color = state->target_lcd_color;
lcd_backlight_color(
LCD_HUE(state->current_lcd_color),
LCD_SAT(state->current_lcd_color),
LCD_INT(state->current_lcd_color));
return false;
}
#endif // LCD_BACKLIGHT_ENABLE
#ifdef LCD_ENABLE
bool keyframe_display_layer_text(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
gdispClear(White);
gdispDrawString(0, 10, state->layer_text, state->font_dejavusansbold12, Black);
gdispFlush();
return false;
}
static void format_layer_bitmap_string(uint16_t default_layer, uint16_t layer, char* buffer) {
for (int i=0; i<16;i++)
{
uint32_t mask = (1u << i);
if (default_layer & mask) {
if (layer & mask) {
*buffer = 'B';
} else {
*buffer = 'D';
}
} else if (layer & mask) {
*buffer = '1';
} else {
*buffer = '0';
}
++buffer;
if (i==3 || i==7 || i==11) {
*buffer = ' ';
++buffer;
}
}
*buffer = 0;
}
bool keyframe_display_layer_bitmap(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
const char* layer_help = "1=On D=Default B=Both";
char layer_buffer[16 + 4]; // 3 spaces and one null terminator
gdispClear(White);
gdispDrawString(0, 0, layer_help, state->font_fixed5x8, Black);
format_layer_bitmap_string(state->status.default_layer, state->status.layer, layer_buffer);
gdispDrawString(0, 10, layer_buffer, state->font_fixed5x8, Black);
format_layer_bitmap_string(state->status.default_layer >> 16, state->status.layer >> 16, layer_buffer);
gdispDrawString(0, 20, layer_buffer, state->font_fixed5x8, Black);
gdispFlush();
return false;
}
#endif // LCD_ENABLE
bool user_visualizer_inited(keyframe_animation_t* animation, visualizer_state_t* state) {
(void)animation;
(void)state;
dprint("User visualizer inited\n");
visualizer_enabled = true;
return false;
}
// TODO: Optimize the stack size, this is probably way too big
static THD_WORKING_AREA(visualizerThreadStack, 1024);
static THD_FUNCTION(visualizerThread, arg) {
(void)arg;
event_listener_t event_listener;
chEvtRegister(&layer_changed_event, &event_listener, 0);
visualizer_state_t state = {
.status = {
.default_layer = 0xFFFFFFFF,
.layer = 0xFFFFFFFF,
.leds = 0xFFFFFFFF,
},
.current_lcd_color = 0,
#ifdef LCD_ENABLE
.font_fixed5x8 = gdispOpenFont("fixed_5x8"),
.font_dejavusansbold12 = gdispOpenFont("DejaVuSansBold12")
#endif
};
initialize_user_visualizer(&state);
state.prev_lcd_color = state.current_lcd_color;
#ifdef LCD_BACKLIGHT_ENABLE
lcd_backlight_color(
LCD_HUE(state.current_lcd_color),
LCD_SAT(state.current_lcd_color),
LCD_INT(state.current_lcd_color));
#endif
systime_t sleep_time = TIME_INFINITE;
systime_t current_time = chVTGetSystemTimeX();
while(true) {
systime_t new_time = chVTGetSystemTimeX();
systime_t delta = new_time - current_time;
current_time = new_time;
bool enabled = visualizer_enabled;
if (!same_status(&state.status, &current_status)) {
if (visualizer_enabled) {
state.status = current_status;
update_user_visualizer_state(&state);
state.prev_lcd_color = state.current_lcd_color;
}
}
sleep_time = TIME_INFINITE;
for (int i=0;i<MAX_SIMULTANEOUS_ANIMATIONS;i++) {
if (animations[i]) {
update_keyframe_animation(animations[i], &state, delta, &sleep_time);
}
}
if (enabled != visualizer_enabled) {
sleep_time = 0;
}
systime_t after_update = chVTGetSystemTimeX();
unsigned update_delta = after_update - current_time;
if (sleep_time != TIME_INFINITE) {
if (sleep_time > update_delta) {
sleep_time -= update_delta;
}
else {
sleep_time = 0;
}
}
dprintf("Update took %d, last delta %d, sleep_time %d\n", update_delta, delta, sleep_time);
chEvtWaitOneTimeout(EVENT_MASK(0), sleep_time);
}
#ifdef LCD_ENABLE
gdispCloseFont(state.font_fixed5x8);
gdispCloseFont(state.font_dejavusansbold12);
#endif
}
void visualizer_init(void) {
// We are using a low priority thread, the idea is to have it run only
// when the main thread is sleeping during the matrix scanning
chEvtObjectInit(&layer_changed_event);
(void)chThdCreateStatic(visualizerThreadStack, sizeof(visualizerThreadStack),
LOWPRIO, visualizerThread, NULL);
}
void visualizer_set_state(uint32_t default_state, uint32_t state, uint32_t leds) {
// Note that there's a small race condition here, the thread could read
// a state where one of these are set but not the other. But this should
// not really matter as it will be fixed during the next loop step.
// Alternatively a mutex could be used instead of the volatile variables
bool changed = false;
visualizer_keyboard_status_t new_status = {
.layer = state,
.default_layer = default_state,
.leds = leds,
};
if (!same_status(&current_status, &new_status)) {
changed = true;
}
current_status = new_status;
if (changed) {
chEvtBroadcast(&layer_changed_event);
}
}

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/*
The MIT License (MIT)
Copyright (c) 2016 Fred Sundvik
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#ifndef VISUALIZER_H
#define VISUALIZER_H
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#ifdef LCD_ENABLE
#include "gfx.h"
#endif
#ifdef LCD_BACKLIGHT_ENABLE
#include "lcd_backlight.h"
#endif
// This need to be called once at the start
void visualizer_init(void);
// This should be called before every matrix scan
void visualizer_set_state(uint32_t default_state, uint32_t state, uint32_t leds);
// If you need support for more than 8 keyframes per animation, you can change this
#define MAX_VISUALIZER_KEY_FRAMES 8
struct keyframe_animation_t;
typedef struct {
uint32_t layer;
uint32_t default_layer;
uint32_t leds; // See led.h for available statuses
} visualizer_keyboard_status_t;
// The state struct is used by the various keyframe functions
// It's also used for setting the LCD color and layer text
// from the user customized code
typedef struct visualizer_state_t {
// The user code should primarily be modifying these
uint32_t target_lcd_color;
const char* layer_text;
// The user visualizer(and animation functions) can read these
visualizer_keyboard_status_t status;
// These are used by the animation functions
uint32_t current_lcd_color;
uint32_t prev_lcd_color;
#ifdef LCD_ENABLE
font_t font_fixed5x8;
font_t font_dejavusansbold12;
#endif
} visualizer_state_t;
// Any custom keyframe function should have this signature
// return true to get continuous updates, otherwise you will only get one
// update per frame
typedef bool (*frame_func)(struct keyframe_animation_t*, visualizer_state_t*);
// Represents a keyframe animation, so fields are internal to the system
// while others are meant to be initialized by the user code
typedef struct keyframe_animation_t {
// These should be initialized
int num_frames;
bool loop;
int frame_lengths[MAX_VISUALIZER_KEY_FRAMES];
frame_func frame_functions[MAX_VISUALIZER_KEY_FRAMES];
// Used internally by the system, and can also be read by
// keyframe update functions
int current_frame;
int time_left_in_frame;
bool need_update;
} keyframe_animation_t;
void start_keyframe_animation(keyframe_animation_t* animation);
void stop_keyframe_animation(keyframe_animation_t* animation);
// Some predefined keyframe functions that can be used by the user code
// Does nothing, useful for adding delays
bool keyframe_no_operation(keyframe_animation_t* animation, visualizer_state_t* state);
// Animates the LCD backlight color between the current color and the target color (of the state)
bool keyframe_animate_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state);
// Sets the backlight color to the target color
bool keyframe_set_backlight_color(keyframe_animation_t* animation, visualizer_state_t* state);
// Displays the layer text centered vertically on the screen
bool keyframe_display_layer_text(keyframe_animation_t* animation, visualizer_state_t* state);
// Displays a bitmap (0/1) of all the currently active layers
bool keyframe_display_layer_bitmap(keyframe_animation_t* animation, visualizer_state_t* state);
// Call this once, when the initial animation has finished, alternatively you can call it
// directly from the initalize_user_visualizer function (the animation can be null)
bool user_visualizer_inited(keyframe_animation_t* animation, visualizer_state_t* state);
// These two functions have to be implemented by the user
void initialize_user_visualizer(visualizer_state_t* state);
void update_user_visualizer_state(visualizer_state_t* state);
#endif /* VISUALIZER_H */

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GFXLIB = $(VISUALIZER_DIR)/ugfx
ifdef LCD_ENABLE
include $(GFXLIB)/gfx.mk
OPT_DEFS += -DLCD_ENABLE
endif
SRC += $(GFXSRC)
SRC += $(GFXSRC) $(VISUALIZER_DIR)/visualizer.c
INC += $(GFXINC) $(VISUALIZER_DIR)
ifdef LCD_BACKLIGHT_ENABLE
SRC += $(VISUALIZER_DIR)/lcd_backlight.c
SRC += lcd_backlight_hal.c
OPT_DEFS += -DLCD_BACKLIGHT_ENABLE
endif