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libraries/FastLED/dev/video_test.hpp

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+/// @file    VideoTest.ino
+/// @brief   Demonstrates a simple video test using alternating black/red pixels
+/// @example VideoTest.ino
+
+#include <FastLED.h>
+#include "fl/bytestreammemory.h"
+#include "fx/2d/video.hpp"
+#include "fx/fx_engine.h"
+#include "fl/ptr.h"
+#include <iostream>
+
+using namespace fl;
+
+#define LED_PIN 2
+#define BRIGHTNESS 96
+#define LED_TYPE WS2811
+#define COLOR_ORDER GRB
+
+#define MATRIX_WIDTH 22
+#define MATRIX_HEIGHT 22
+#define NUM_LEDS (MATRIX_WIDTH * MATRIX_HEIGHT)
+
+CRGB leds[NUM_LEDS];
+
+const int BYTES_PER_FRAME = 3 * MATRIX_WIDTH * MATRIX_HEIGHT;
+const int NUM_FRAMES = 2;
+const uint32_t BUFFER_SIZE = BYTES_PER_FRAME * NUM_FRAMES;
+
+ByteStreamMemoryPtr memoryStream;
+VideoPtr videoFx;
+FxEngine fxEngine(NUM_LEDS);
+
+using namespace fl;
+
+
+void write_one_frame(ByteStreamMemoryPtr memoryStream) {
+    //memoryStream->seek(0);  // Reset to the beginning of the stream
+    uint32_t total_bytes_written = 0;
+    int toggle = (millis() / 500) % 2;
+    for (uint32_t i = 0; i < NUM_LEDS; ++i) {
+        CRGB color = (i % 2 == toggle) ? CRGB::Black : CRGB::Red;
+        size_t bytes_written = memoryStream->write(color.raw, 3);
+        if (bytes_written != 3) {
+            std::cout << "Error writing to memory stream at LED " << i << std::endl;
+        }
+        total_bytes_written += bytes_written;
+    }
+    std::cout << "Total bytes written: " << total_bytes_written << " / " << BUFFER_SIZE << std::endl;
+}
+
+void setup() {
+    delay(1000); // sanity delay
+    FastLED.addLeds<LED_TYPE, LED_PIN, COLOR_ORDER>(leds, NUM_LEDS)
+        .setCorrection(TypicalLEDStrip);
+    FastLED.setBrightness(BRIGHTNESS);
+
+    // Create and fill the ByteStreamMemory with test data
+    memoryStream = Ptr::New<ByteStreamMemory>(BUFFER_SIZE);
+    write_one_frame(memoryStream);  // Write initial frame data
+
+    // Create and initialize Video fx object
+    XYMap xymap(MATRIX_WIDTH, MATRIX_HEIGHT);
+    videoFx = Fx::make<VideoPtr>(xymap);
+    videoFx->beginStream(memoryStream);
+
+    // Add the video effect to the FxEngine
+    fxEngine.addFx(videoFx);
+
+    std::cout << "Setup complete. Starting main loop." << std::endl;
+}
+
+void loop() {
+    // Reset the memory stream position before reading
+    //memoryStream->seek(0);
+    write_one_frame(memoryStream);  // Write next frame data
+
+    // Draw the frame
+    fxEngine.draw(millis(), leds);
+
+    // Debug output
+    //std::cout << "First LED: R=" << (int)leds[0].r << " G=" << (int)leds[0].g << " B=" << (int)leds[0].b << std::endl;
+    //std::cout << "Last LED: R=" << (int)leds[NUM_LEDS-1].r << " G=" << (int)leds[NUM_LEDS-1].g << " B=" << (int)leds[NUM_LEDS-1].b << std::endl;
+
+    // Show the LEDs
+    FastLED.show();
+
+    delay(100); // Adjust this delay to control frame rate
+}