1 files changed, 160 insertions, 0 deletions

diff --git a/src/input_common/gcadapter/gc_adapter.h b/src/input_common/gcadapter/gc_adapter.h
new file mode 100644
index 000000000..0ea6263eb
--- /dev/null
+++ b/src/input_common/gcadapter/gc_adapter.h
@@ -0,0 +1,160 @@
+// Copyright 2014 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#pragma once
+#include <algorithm>
+#include <functional>
+#include <mutex>
+#include <thread>
+#include <libusb.h>
+#include "common/common_types.h"
+#include "common/threadsafe_queue.h"
+
+namespace GCAdapter {
+
+enum {
+    PAD_USE_ORIGIN = 0x0080,
+    PAD_GET_ORIGIN = 0x2000,
+    PAD_ERR_STATUS = 0x8000,
+};
+
+enum class PadButton {
+    PAD_BUTTON_LEFT = 0x0001,
+    PAD_BUTTON_RIGHT = 0x0002,
+    PAD_BUTTON_DOWN = 0x0004,
+    PAD_BUTTON_UP = 0x0008,
+    PAD_TRIGGER_Z = 0x0010,
+    PAD_TRIGGER_R = 0x0020,
+    PAD_TRIGGER_L = 0x0040,
+    PAD_BUTTON_A = 0x0100,
+    PAD_BUTTON_B = 0x0200,
+    PAD_BUTTON_X = 0x0400,
+    PAD_BUTTON_Y = 0x0800,
+    PAD_BUTTON_START = 0x1000,
+    // Below is for compatibility with "AxisButton" type
+    PAD_STICK = 0x2000,
+};
+
+extern const std::array<PadButton, 12> PadButtonArray;
+
+enum class PadAxes : u8 {
+    StickX,
+    StickY,
+    SubstickX,
+    SubstickY,
+    TriggerLeft,
+    TriggerRight,
+    Undefined,
+};
+
+struct GCPadStatus {
+    u16 button{};       // Or-ed PAD_BUTTON_* and PAD_TRIGGER_* bits
+    u8 stick_x{};       // 0 <= stick_x       <= 255
+    u8 stick_y{};       // 0 <= stick_y       <= 255
+    u8 substick_x{};    // 0 <= substick_x    <= 255
+    u8 substick_y{};    // 0 <= substick_y    <= 255
+    u8 trigger_left{};  // 0 <= trigger_left  <= 255
+    u8 trigger_right{}; // 0 <= trigger_right <= 255
+
+    static constexpr u8 MAIN_STICK_CENTER_X = 0x80;
+    static constexpr u8 MAIN_STICK_CENTER_Y = 0x80;
+    static constexpr u8 MAIN_STICK_RADIUS = 0x7f;
+    static constexpr u8 C_STICK_CENTER_X = 0x80;
+    static constexpr u8 C_STICK_CENTER_Y = 0x80;
+    static constexpr u8 C_STICK_RADIUS = 0x7f;
+    static constexpr u8 THRESHOLD = 10;
+
+    // 256/4, at least a quarter press to count as a press. For polling mostly
+    static constexpr u8 TRIGGER_THRESHOLD = 64;
+
+    u8 port{};
+    PadAxes axis{PadAxes::Undefined};
+    u8 axis_value{255};
+};
+
+struct GCState {
+    std::unordered_map<int, bool> buttons;
+    std::unordered_map<int, u16> axes;
+};
+
+enum class ControllerTypes { None, Wired, Wireless };
+
+enum {
+    NO_ADAPTER_DETECTED = 0,
+    ADAPTER_DETECTED = 1,
+};
+
+class Adapter {
+public:
+    /// Initialize the GC Adapter capture and read sequence
+    Adapter();
+
+    /// Close the adapter read thread and release the adapter
+    ~Adapter();
+    /// Used for polling
+    void BeginConfiguration();
+    void EndConfiguration();
+
+    std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue();
+    const std::array<Common::SPSCQueue<GCPadStatus>, 4>& GetPadQueue() const;
+
+    std::array<GCState, 4>& GetPadState();
+    const std::array<GCState, 4>& GetPadState() const;
+
+private:
+    GCPadStatus GetPadStatus(int port, const std::array<u8, 37>& adapter_payload);
+
+    void PadToState(const GCPadStatus& pad, GCState& state);
+
+    void Read();
+    void ScanThreadFunc();
+    /// Begin scanning for the GC Adapter.
+    void StartScanThread();
+
+    /// Stop scanning for the adapter
+    void StopScanThread();
+
+    /// Returns true if there is a device connected to port
+    bool DeviceConnected(int port);
+
+    /// Resets status of device connected to port
+    void ResetDeviceType(int port);
+
+    /// Returns true if we successfully gain access to GC Adapter
+    bool CheckDeviceAccess(libusb_device* device);
+
+    /// Captures GC Adapter endpoint address,
+    void GetGCEndpoint(libusb_device* device);
+
+    /// For shutting down, clear all data, join all threads, release usb
+    void Reset();
+
+    /// For use in initialization, querying devices to find the adapter
+    void Setup();
+
+    int current_status = NO_ADAPTER_DETECTED;
+    libusb_device_handle* usb_adapter_handle = nullptr;
+    std::array<ControllerTypes, 4> adapter_controllers_status{};
+
+    std::mutex s_mutex;
+
+    std::thread adapter_input_thread;
+    bool adapter_thread_running;
+
+    std::mutex initialization_mutex;
+    std::thread detect_thread;
+    bool detect_thread_running = false;
+
+    libusb_context* libusb_ctx;
+
+    u8 input_endpoint = 0;
+    u8 output_endpoint = 0;
+
+    bool configuring = false;
+
+    std::array<Common::SPSCQueue<GCPadStatus>, 4> pad_queue;
+    std::array<GCState, 4> state;
+};
+
+} // namespace GCAdapter