Let us start here, from square one. No, from Zero!

acio/mdxf/mdxf.cpp

@@ -0,0 +1,157 @@
+#include "mdxf.h"
+
+#include "avs/game.h"
+#include "games/ddr/io.h"
+#include "launcher/launcher.h"
+#include "rawinput/rawinput.h"
+#include "util/logging.h"
+#include "util/utils.h"
+
+// constants
+const size_t STATUS_BUFFER_SIZE = 32;
+
+// static stuff
+static uint8_t COUNTER = 0;
+
+// buffers
+#pragma pack(push, 1)
+static struct {
+    uint8_t STATUS_BUFFER_17[7][STATUS_BUFFER_SIZE] {};
+    uint8_t STATUS_BUFFER_18[7][STATUS_BUFFER_SIZE] {};
+} BUFFERS {};
+#pragma pack(pop)
+
+static bool STATUS_BUFFER_FREEZE = false;
+
+/*
+ * Implementations
+ */
+
+static bool __cdecl ac_io_mdxf_get_control_status_buffer(int node, void *buffer, uint8_t a3, uint8_t a4) {
+
+    // Dance Dance Revolution
+    if (avs::game::is_model("MDX")) {
+
+        // get buffer index
+        auto i = (COUNTER + a3) % std::size(BUFFERS.STATUS_BUFFER_17);
+
+        // copy buffer
+        if (node == 17) {
+            memcpy(buffer, BUFFERS.STATUS_BUFFER_17[i], STATUS_BUFFER_SIZE);
+        } else if (node == 18) {
+            memcpy(buffer, BUFFERS.STATUS_BUFFER_18[i], STATUS_BUFFER_SIZE);
+        } else {
+
+            // fill with zeros on unknown node
+            memset(buffer, 0, STATUS_BUFFER_SIZE);
+            return false;
+        }
+    }
+
+    // return success
+    return true;
+}
+
+static bool __cdecl ac_io_mdxf_set_output_level(unsigned int a1, unsigned int a2, uint8_t a3) {
+    // TODO(felix): DDR BIO2 lights
+
+    return true;
+}
+
+static bool __cdecl ac_io_mdxf_update_control_status_buffer(int node) {
+
+    // increase counter
+    COUNTER = (COUNTER + 1) % std::size(BUFFERS.STATUS_BUFFER_17);
+
+    // check freeze
+    if (STATUS_BUFFER_FREEZE) {
+        return true;
+    }
+
+    // clear buffer
+    uint8_t *buffer = nullptr;
+    switch (node) {
+        case 17:
+            buffer = BUFFERS.STATUS_BUFFER_17[COUNTER];
+            break;
+        case 18:
+            buffer = BUFFERS.STATUS_BUFFER_18[COUNTER];
+            break;
+        default:
+
+            // return failure on unknown node
+            return false;
+    }
+    memset(buffer, 0, STATUS_BUFFER_SIZE);
+
+    // Dance Dance Revolution
+    if (avs::game::is_model("MDX")) {
+
+        // Sensor Map (LDUR):
+        // FOOT DOWN = bit 32-35 = byte 4, bit 0-3
+        // FOOT UP = bit 36-39 = byte 4, bit 4-7
+        // FOOT RIGHT = bit 40-43 = byte 5, bit 0-3
+        // FOOT LEFT = bit 44-47 = byte 5, bit 4-7
+        static const size_t buttons_17[] = {
+                games::ddr::Buttons::P1_PANEL_UP,
+                games::ddr::Buttons::P1_PANEL_DOWN,
+                games::ddr::Buttons::P1_PANEL_LEFT,
+                games::ddr::Buttons::P1_PANEL_RIGHT,
+        };
+        static const size_t buttons_18[] = {
+                games::ddr::Buttons::P2_PANEL_UP,
+                games::ddr::Buttons::P2_PANEL_DOWN,
+                games::ddr::Buttons::P2_PANEL_LEFT,
+                games::ddr::Buttons::P2_PANEL_RIGHT,
+        };
+
+        // decide on button map
+        const size_t *button_map = nullptr;
+        switch (node) {
+            case 17:
+                button_map = &buttons_17[0];
+                break;
+            case 18:
+                button_map = &buttons_18[0];
+                break;
+        }
+
+        // get buttons
+        auto &buttons = games::ddr::get_buttons();
+
+        if (GameAPI::Buttons::getState(RI_MGR, buttons.at(button_map[0]))) {
+            buffer[4] |= 0xF0;
+        }
+        if (GameAPI::Buttons::getState(RI_MGR, buttons.at(button_map[1]))) {
+            buffer[4] |= 0x0F;
+        }
+        if (GameAPI::Buttons::getState(RI_MGR, buttons.at(button_map[2]))) {
+            buffer[5] |= 0xF0;
+        }
+        if (GameAPI::Buttons::getState(RI_MGR, buttons.at(button_map[3]))) {
+            buffer[5] |= 0x0F;
+        }
+    }
+
+    // return success
+    return true;
+}
+
+/*
+ * Module stuff
+ */
+
+acio::MDXFModule::MDXFModule(HMODULE module, acio::HookMode hookMode) : ACIOModule("MDXF", module, hookMode) {
+    this->status_buffer = (uint8_t*) &BUFFERS;
+    this->status_buffer_size = sizeof(BUFFERS);
+    this->status_buffer_freeze = &STATUS_BUFFER_FREEZE;
+}
+
+void acio::MDXFModule::attach() {
+    ACIOModule::attach();
+
+    // hooks
+    ACIO_MODULE_HOOK(ac_io_mdxf_get_control_status_buffer);
+    ACIO_MODULE_HOOK(ac_io_mdxf_set_output_level);
+    ACIO_MODULE_HOOK(ac_io_mdxf_update_control_status_buffer);
+}

acio/mdxf/mdxf.h

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "../module.h"
+
+namespace acio {
+
+    class MDXFModule : public ACIOModule {
+    public:
+        MDXFModule(HMODULE module, HookMode hookMode);
+
+        virtual void attach() override;
+    };
+}