chuni/chusan: added LED output to DLLs (will break most DLLs)

Credits: somewhatlurker, skogaby
https://dev.s-ul.net/skogaby/segatools/-/blob/ongeki-15093/

chuniio/leddata.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <windows.h>
+#include <stdint.h>
+
+#define LED_PACKET_FRAMING 0xE0
+#define LED_PACKET_ESCAPE 0xD0
+#define LED_NUM_MAX 66
+#define LED_BOARDS_TOTAL 3
+#define LED_OUTPUT_HEADER_SIZE 2
+#define LED_OUTPUT_DATA_SIZE_MAX LED_NUM_MAX * 3 * 2  // max if every byte's escaped
+#define LED_OUTPUT_TOTAL_SIZE_MAX LED_OUTPUT_HEADER_SIZE + LED_OUTPUT_DATA_SIZE_MAX
+
+// This struct is used to send data related to the slider and billboard LEDs
+struct _chuni_led_data_buf_t {
+    byte framing; // Sync byte
+    uint8_t board; // LED output the data is for (0-1: billboard, 2: slider)
+    byte data[LED_OUTPUT_DATA_SIZE_MAX]; // Buffer for LEDs
+    byte data_len; // How many bytes to output from the buffer
+};
+
+static byte chuni_led_board_data_lens[LED_BOARDS_TOTAL] = {53*3, 63*3, 31*3};