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// Copyright 2017 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
#include "InputCommon/ControllerInterface/Win32/Win32.h"
#include <windows.h>
#include <array>
#include <future>
#include <thread>
#include "Common/Event.h"
#include "Common/Flag.h"
#include "Common/Logging/Log.h"
#include "Common/ScopeGuard.h"
#include "Common/Thread.h"
#include "InputCommon/ControllerInterface/DInput/DInput.h"
#include "InputCommon/ControllerInterface/XInput/XInput.h"
constexpr UINT WM_DOLPHIN_STOP = WM_USER;
static Common::Event s_received_device_change_event;
// Dolphin's render window
static HWND s_hwnd;
// Windows messaging window (hidden)
static HWND s_message_window;
static std::thread s_thread;
static Common::Flag s_first_populate_devices_asked;
static LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM wparam, LPARAM lparam)
{
if (message == WM_INPUT_DEVICE_CHANGE)
{
// Windows automatically sends this message before we ask for it and before we are "ready" to
// listen for it.
if (s_first_populate_devices_asked.IsSet())
{
s_received_device_change_event.Set();
// TODO: we could easily use the message passed alongside this event, which tells
// whether a device was added or removed, to avoid removing old, still connected, devices
g_controller_interface.PlatformPopulateDevices([] {
ciface::DInput::PopulateDevices(s_hwnd);
ciface::XInput::PopulateDevices();
});
}
}
return DefWindowProc(hwnd, message, wparam, lparam);
}
void ciface::Win32::Init(void* hwnd)
{
s_hwnd = static_cast<HWND>(hwnd);
XInput::Init();
std::promise<HWND> message_window_promise;
s_thread = std::thread([&message_window_promise] {
Common::SetCurrentThreadName("ciface::Win32 Message Loop");
HWND message_window = nullptr;
Common::ScopeGuard promise_guard([&] { message_window_promise.set_value(message_window); });
if (FAILED(CoInitializeEx(nullptr, COINIT_APARTMENTTHREADED)))
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "CoInitializeEx failed: {}", GetLastError());
return;
}
Common::ScopeGuard uninit([] { CoUninitialize(); });
WNDCLASSEX window_class_info{};
window_class_info.cbSize = sizeof(window_class_info);
window_class_info.lpfnWndProc = WindowProc;
window_class_info.hInstance = GetModuleHandle(nullptr);
window_class_info.lpszClassName = L"Message";
ATOM window_class = RegisterClassEx(&window_class_info);
if (!window_class)
{
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "RegisterClassEx failed: {}", GetLastError());
return;
}
Common::ScopeGuard unregister([&window_class] {
if (!UnregisterClass(MAKEINTATOM(window_class), GetModuleHandle(nullptr)))
ERROR_LOG_FMT(CONTROLLERINTERFACE, "UnregisterClass failed: {}", GetLastError());
});
message_window = CreateWindowEx(0, L"Message", nullptr, 0, 0, 0, 0, 0, HWND_MESSAGE, nullptr,
nullptr, nullptr);
promise_guard.Exit();
if (!message_window)
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "CreateWindowEx failed: {}", GetLastError());
return;
}
Common::ScopeGuard destroy([&] {
if (!DestroyWindow(message_window))
ERROR_LOG_FMT(CONTROLLERINTERFACE, "DestroyWindow failed: {}", GetLastError());
});
std::array<RAWINPUTDEVICE, 2> devices;
// game pad devices
devices[0].usUsagePage = 0x01;
devices[0].usUsage = 0x05;
devices[0].dwFlags = RIDEV_DEVNOTIFY;
devices[0].hwndTarget = message_window;
// joystick devices
devices[1].usUsagePage = 0x01;
devices[1].usUsage = 0x04;
devices[1].dwFlags = RIDEV_DEVNOTIFY;
devices[1].hwndTarget = message_window;
if (!RegisterRawInputDevices(devices.data(), static_cast<UINT>(devices.size()),
static_cast<UINT>(sizeof(decltype(devices)::value_type))))
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "RegisterRawInputDevices failed: {}", GetLastError());
return;
}
MSG msg;
while (GetMessage(&msg, nullptr, 0, 0) > 0)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
if (msg.message == WM_DOLPHIN_STOP)
break;
}
});
s_message_window = message_window_promise.get_future().get();
}
void ciface::Win32::PopulateDevices(void* hwnd)
{
if (s_thread.joinable())
{
s_hwnd = static_cast<HWND>(hwnd);
s_first_populate_devices_asked.Set();
s_received_device_change_event.Reset();
// Do this forced devices refresh in the messaging thread so it won't cause any race conditions
PostMessage(s_message_window, WM_INPUT_DEVICE_CHANGE, 0, 0);
std::thread([] {
if (!s_received_device_change_event.WaitFor(std::chrono::seconds(5)))
ERROR_LOG_FMT(CONTROLLERINTERFACE, "win32 timed out when trying to populate devices");
}).detach();
}
else
{
ERROR_LOG_FMT(CONTROLLERINTERFACE,
"win32 asked to populate devices, but device thread isn't running");
}
}
void ciface::Win32::ChangeWindow(void* hwnd)
{
if (s_thread.joinable()) // "Has init?"
{
s_hwnd = static_cast<HWND>(hwnd);
ciface::DInput::ChangeWindow(s_hwnd);
}
}
void ciface::Win32::DeInit()
{
NOTICE_LOG_FMT(CONTROLLERINTERFACE, "win32 DeInit");
if (s_thread.joinable())
{
PostMessage(s_message_window, WM_DOLPHIN_STOP, 0, 0);
s_thread.join();
s_message_window = nullptr;
s_received_device_change_event.Reset();
s_first_populate_devices_asked.Clear();
DInput::DeInit();
}
s_hwnd = nullptr;
XInput::DeInit();
}
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