FxLedmapper32x32.ino

This sketch mirrors the SD-backed video flow in FASTLED4 and points it at a ledmapper.com-style 32x32 asset at data/video1.rgb.

This sketch mirrors the SD-backed video flow in FASTLED4 and points it at a ledmapper.com-style 32x32 asset at data/video1.rgb.video1.rgb is NOT committed to this repo. It is hosted in FastLED/assets and referenced by the sidecar data/video1.rgb.lnk (fbuild JSON descriptor with url/sha256/size) resolved at build time. See data/readme.txt for the fetch command (fbuild lnk pull).

The preview screen map is loaded from data/screenmap.json, sourced from the ledmapper 32x32 quad serpentine preset, and is kept local because it is small.

// @filter: (memory is large)

 
#include "FastLED.h"
#include "Arduino.h"
 
#include "fl/fx/video.h"
#include "fl/math/screenmap.h"
#include "fl/system/file_system.h"
#include "fl/ui/ui.h"
 
#ifndef LED_PIN
#define LED_PIN 2
#endif
 
#ifndef CHIP_SELECT_PIN
#define CHIP_SELECT_PIN 5
#endif
 
#define LED_TYPE WS2812B
#define COLOR_ORDER GRB
 
#define MATRIX_WIDTH 32
#define MATRIX_HEIGHT 32
#define NUM_LEDS (MATRIX_WIDTH * MATRIX_HEIGHT)
 
#define VIDEO_FPS 30
#define VIDEO_FRAME_HISTORY 2
#define DEFAULT_BRIGHTNESS 96
 
fl::CRGB leds[NUM_LEDS];
 
fl::FileSystem filesystem;
fl::Video video;
fl::ScreenMap screenMap;
 
fl::UITitle title("Ledmapper 32x32 Video");
fl::UIDescription description(
    "Streams data/video1.rgb as a 32x32 mapped raw RGB asset. "
    "Change VIDEO_FPS if the export was authored at a different frame rate.");
fl::UISlider brightness("Brightness", DEFAULT_BRIGHTNESS, 0, 255, 1);
fl::UISlider playbackSpeed("Playback Speed", 1.0f, -2.0f, 2.0f, 0.01f);
 
bool gError = false;
 
void setup() {
    Serial.begin(115200);
    Serial.println("FxLedmapper32x32 setup");
 
    if (!filesystem.beginSd(CHIP_SELECT_PIN)) {
        Serial.println("Failed to initialize file system.");
        gError = true;
        return;
    }
 
    if (!filesystem.readScreenMap("data/screenmap.json", "strip1", &screenMap)) {
        Serial.println("Failed to read data/screenmap.json");
        gError = true;
        return;
    }
 
    FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS)
        .setCorrection(TypicalLEDStrip)
        .setScreenMap(screenMap);
    FastLED.setBrightness(DEFAULT_BRIGHTNESS);
 
    video = filesystem.openVideo("data/video1.rgb", NUM_LEDS, VIDEO_FPS,
                                 VIDEO_FRAME_HISTORY);
    if (!video) {
        FL_WARN("Failed to open data/video1.rgb");
        gError = true;
        return;
    }
 
    fill_solid(leds, NUM_LEDS, CRGB::Black);
    FastLED.show();
    Serial.println("FxLedmapper32x32 ready");
}
 
void loop() {
    if (gError) {
        EVERY_N_SECONDS(1) {
            FL_WARN("FxLedmapper32x32 halted due to setup error.");
        }
        return;
    }
 
    FastLED.setBrightness(static_cast<uint8_t>(brightness.value()));
    video.setTimeScale(playbackSpeed.value());
    video.draw(fl::millis(), leds);
    FastLED.show();
}