Core/WiimoteReal: Make wiimote source type an enum class and add Get/SetWiimoteSource functions. Add connected real Wii Remotes to a pool when a slot is not available.

Source/Core/Core/BootManager.cpp

@@ -98,7 +98,7 @@ private:
   std::string strBackend;
   std::string sBackend;
   std::string m_strGPUDeterminismMode;
-  std::array<int, MAX_BBMOTES> iWiimoteSource;
+  std::array<WiimoteSource, MAX_BBMOTES> iWiimoteSource;
   std::array<SerialInterface::SIDevices, SerialInterface::MAX_SI_CHANNELS> Pads;
   std::array<ExpansionInterface::TEXIDevices, ExpansionInterface::MAX_EXI_CHANNELS> m_EXIDevice;
 };
@@ -133,7 +133,9 @@ void ConfigCache::SaveConfig(const SConfig& config)
   m_OCEnable = config.m_OCEnable;
   m_bt_passthrough_enabled = config.m_bt_passthrough_enabled;
 
-  std::copy(std::begin(g_wiimote_sources), std::end(g_wiimote_sources), std::begin(iWiimoteSource));
+  for (int i = 0; i != MAX_BBMOTES; ++i)
+    iWiimoteSource[i] = WiimoteCommon::GetSource(i);
+
   std::copy(std::begin(config.m_SIDevice), std::end(config.m_SIDevice), std::begin(Pads));
   std::copy(std::begin(config.m_EXIDevice), std::end(config.m_EXIDevice), std::begin(m_EXIDevice));
 
@@ -180,10 +182,7 @@ void ConfigCache::RestoreConfig(SConfig* config)
     for (unsigned int i = 0; i < MAX_BBMOTES; ++i)
     {
       if (bSetWiimoteSource[i])
-      {
+        WiimoteCommon::SetSource(i, iWiimoteSource[i]);
-        g_wiimote_sources[i] = iWiimoteSource[i];
-        WiimoteReal::ChangeWiimoteSource(i, iWiimoteSource[i]);
-      }
     }
   }
 
@@ -304,21 +303,22 @@ bool BootCore(std::unique_ptr<BootParameters> boot, const WindowSystemInfo& wsi)
       for (unsigned int i = 0; i < MAX_WIIMOTES; ++i)
       {
         controls_section->Get(fmt::format("WiimoteSource{}", i), &source, -1);
-        if (source != -1 && g_wiimote_sources[i] != (unsigned)source &&
+        if (source != -1 && WiimoteCommon::GetSource(i) != WiimoteSource(source) &&
-            source >= WIIMOTE_SRC_NONE && source <= WIIMOTE_SRC_REAL)
+            WiimoteSource(source) >= WiimoteSource::None &&
+            WiimoteSource(source) <= WiimoteSource::Real)
         {
           config_cache.bSetWiimoteSource[i] = true;
-          g_wiimote_sources[i] = source;
+          WiimoteCommon::SetSource(i, WiimoteSource(source));
-          WiimoteReal::ChangeWiimoteSource(i, source);
         }
       }
       controls_section->Get("WiimoteSourceBB", &source, -1);
-      if (source != -1 && g_wiimote_sources[WIIMOTE_BALANCE_BOARD] != (unsigned)source &&
+      if (source != -1 &&
-          (source == WIIMOTE_SRC_NONE || source == WIIMOTE_SRC_REAL))
+          WiimoteCommon::GetSource(WIIMOTE_BALANCE_BOARD) != WiimoteSource(source) &&
+          (WiimoteSource(source) == WiimoteSource::None ||
+           WiimoteSource(source) == WiimoteSource::Real))
       {
         config_cache.bSetWiimoteSource[WIIMOTE_BALANCE_BOARD] = true;
-        g_wiimote_sources[WIIMOTE_BALANCE_BOARD] = source;
+        WiimoteCommon::SetSource(WIIMOTE_BALANCE_BOARD, WiimoteSource(source));
-        WiimoteReal::ChangeWiimoteSource(WIIMOTE_BALANCE_BOARD, source);
       }
     }
   }

Source/Core/Core/HW/Wiimote.cpp

@@ -25,6 +25,38 @@
 // Limit the amount of wiimote connect requests, when a button is pressed in disconnected state
 static std::array<u8, MAX_BBMOTES> s_last_connect_request_counter;
 
+namespace WiimoteCommon
+{
+static std::array<std::atomic<WiimoteSource>, MAX_BBMOTES> s_wiimote_sources;
+
+WiimoteSource GetSource(unsigned int index)
+{
+  return s_wiimote_sources[index];
+}
+
+void SetSource(unsigned int index, WiimoteSource source)
+{
+  const WiimoteSource previous_source = s_wiimote_sources[index].exchange(source);
+
+  if (previous_source == source)
+  {
+    // No change. Do nothing.
+    return;
+  }
+
+  WiimoteReal::HandleWiimoteSourceChange(index);
+
+  // Reconnect to the emulator.
+  Core::RunAsCPUThread([index, previous_source, source] {
+    if (previous_source != WiimoteSource::None)
+      ::Wiimote::Connect(index, false);
+
+    if (source == WiimoteSource::Emulated)
+      ::Wiimote::Connect(index, true);
+  });
+}
+}  // namespace WiimoteCommon
+
 namespace Wiimote
 {
 static InputConfig s_config(WIIMOTE_INI_NAME, _trans("Wii Remote"), "Wiimote");
@@ -155,7 +187,7 @@ void Pause()
 // An L2CAP packet is passed from the Core to the Wiimote on the HID CONTROL channel.
 void ControlChannel(int number, u16 channel_id, const void* data, u32 size)
 {
-  if (WIIMOTE_SRC_EMU == g_wiimote_sources[number])
+  if (WiimoteCommon::GetSource(number) == WiimoteSource::Emulated)
   {
     static_cast<WiimoteEmu::Wiimote*>(s_config.GetController(number))
         ->ControlChannel(channel_id, data, size);
@@ -169,7 +201,7 @@ void ControlChannel(int number, u16 channel_id, const void* data, u32 size)
 // An L2CAP packet is passed from the Core to the Wiimote on the HID INTERRUPT channel.
 void InterruptChannel(int number, u16 channel_id, const void* data, u32 size)
 {
-  if (WIIMOTE_SRC_EMU == g_wiimote_sources[number])
+  if (WiimoteCommon::GetSource(number) == WiimoteSource::Emulated)
   {
     static_cast<WiimoteEmu::Wiimote*>(s_config.GetController(number))
         ->InterruptChannel(channel_id, data, size);
@@ -182,24 +214,26 @@ void InterruptChannel(int number, u16 channel_id, const void* data, u32 size)
 
 bool ButtonPressed(int number)
 {
+  const WiimoteSource source = WiimoteCommon::GetSource(number);
+
   if (s_last_connect_request_counter[number] > 0)
   {
     --s_last_connect_request_counter[number];
-    if (g_wiimote_sources[number] && NetPlay::IsNetPlayRunning())
+    if (source != WiimoteSource::None && NetPlay::IsNetPlayRunning())
       Wiimote::NetPlay_GetButtonPress(number, false);
     return false;
   }
 
   bool button_pressed = false;
 
-  if (WIIMOTE_SRC_EMU & g_wiimote_sources[number])
+  if (source == WiimoteSource::Emulated)
     button_pressed =
         static_cast<WiimoteEmu::Wiimote*>(s_config.GetController(number))->CheckForButtonPress();
 
-  if (WIIMOTE_SRC_REAL & g_wiimote_sources[number])
+  if (source == WiimoteSource::Real)
     button_pressed = WiimoteReal::CheckForButtonPress(number);
 
-  if (g_wiimote_sources[number] && NetPlay::IsNetPlayRunning())
+  if (source != WiimoteSource::None && NetPlay::IsNetPlayRunning())
     button_pressed = Wiimote::NetPlay_GetButtonPress(number, button_pressed);
 
   return button_pressed;
@@ -210,7 +244,7 @@ void Update(int number, bool connected)
 {
   if (connected)
   {
-    if (WIIMOTE_SRC_EMU & g_wiimote_sources[number])
+    if (WiimoteCommon::GetSource(number) == WiimoteSource::Emulated)
       static_cast<WiimoteEmu::Wiimote*>(s_config.GetController(number))->Update();
     else
       WiimoteReal::Update(number);
@@ -227,25 +261,16 @@ void Update(int number, bool connected)
   }
 }
 
-// Get a mask of attached the pads (eg: controller 1 & 4 -> 0x9)
-unsigned int GetAttached()
-{
-  unsigned int attached = 0;
-  for (unsigned int i = 0; i < MAX_BBMOTES; ++i)
-    if (g_wiimote_sources[i])
-      attached |= (1 << i);
-  return attached;
-}
-
 // Save/Load state
 void DoState(PointerWrap& p)
 {
   for (int i = 0; i < MAX_BBMOTES; ++i)
   {
-    auto state_wiimote_source = u8(g_wiimote_sources[i]);
+    const WiimoteSource source = WiimoteCommon::GetSource(i);
+    auto state_wiimote_source = u8(source);
     p.Do(state_wiimote_source);
 
-    if (WIIMOTE_SRC_EMU == state_wiimote_source)
+    if (WiimoteSource(state_wiimote_source) == WiimoteSource::Emulated)
     {
       // Sync complete state of emulated wiimotes.
       static_cast<WiimoteEmu::Wiimote*>(s_config.GetController(i))->DoState(p);
@@ -255,7 +280,7 @@ void DoState(PointerWrap& p)
     {
       // If using a real wiimote or the save-state source does not match the current source,
       // then force a reconnection on load.
-      if (WIIMOTE_SRC_REAL == g_wiimote_sources[i] || state_wiimote_source != g_wiimote_sources[i])
+      if (source == WiimoteSource::Real || source != WiimoteSource(state_wiimote_source))
       {
         Connect(i, false);
         Connect(i, true);

Source/Core/Core/HW/Wiimote.h

@@ -44,14 +44,18 @@ enum
 
 #define WIIMOTE_INI_NAME "WiimoteNew"
 
-enum
+enum class WiimoteSource
 {
-  WIIMOTE_SRC_NONE = 0,
+  None = 0,
-  WIIMOTE_SRC_EMU = 1,
+  Emulated = 1,
-  WIIMOTE_SRC_REAL = 2,
+  Real = 2,
 };
 
-extern std::array<std::atomic<u32>, MAX_BBMOTES> g_wiimote_sources;
+namespace WiimoteCommon
+{
+WiimoteSource GetSource(unsigned int index);
+void SetSource(unsigned int index, WiimoteSource source);
+}  // namespace WiimoteCommon
 
 namespace Wiimote
 {
@@ -74,7 +78,6 @@ void LoadConfig();
 void Resume();
 void Pause();
 
-unsigned int GetAttached();
 void DoState(PointerWrap& p);
 InputConfig* GetConfig();
 ControllerEmu::ControlGroup* GetWiimoteGroup(int number, WiimoteEmu::WiimoteGroup group);
@@ -105,4 +108,5 @@ void Pause();
 void Refresh();
 
 void LoadSettings();
+
 }  // namespace WiimoteReal

Source/Core/Core/HW/WiimoteReal/WiimoteReal.cpp

@@ -30,8 +30,6 @@
 
 #include "SFML/Network.hpp"
 
-std::array<std::atomic<u32>, MAX_BBMOTES> g_wiimote_sources;
-
 namespace WiimoteReal
 {
 using namespace WiimoteCommon;
@@ -49,9 +47,49 @@ static std::mutex s_known_ids_mutex;
 
 std::mutex g_wiimotes_mutex;
 
+// Real wii remotes assigned to a particular slot.
 std::unique_ptr<Wiimote> g_wiimotes[MAX_BBMOTES];
+
+struct WiimotePoolEntry
+{
+  using Clock = std::chrono::steady_clock;
+
+  std::unique_ptr<Wiimote> wiimote;
+  Clock::time_point entry_time = Clock::now();
+
+  bool IsExpired() const
+  {
+    // Keep wii remotes in the pool for a bit before disconnecting them.
+    constexpr auto POOL_TIME = std::chrono::seconds{5};
+
+    return (Clock::now() - entry_time) > POOL_TIME;
+  }
+};
+
+// Connected wii remotes are placed here when no open slot is set to "Real".
+// They are then automatically disconnected after some time.
+std::vector<WiimotePoolEntry> g_wiimote_pool;
+
 WiimoteScanner g_wiimote_scanner;
 
+static void ProcessWiimotePool()
+{
+  std::lock_guard<std::mutex> wm_lk(g_wiimotes_mutex);
+
+  for (auto it = g_wiimote_pool.begin(); it != g_wiimote_pool.end();)
+  {
+    if (it->IsExpired())
+    {
+      INFO_LOG(WIIMOTE, "Removing expired wiimote pool entry.");
+      it = g_wiimote_pool.erase(it);
+    }
+    else
+    {
+      ++it;
+    }
+  }
+}
+
 Wiimote::Wiimote() = default;
 
 void Wiimote::Shutdown()
@@ -478,7 +516,7 @@ static unsigned int CalculateWantedWiimotes()
   // Figure out how many real Wiimotes are required
   unsigned int wanted_wiimotes = 0;
   for (unsigned int i = 0; i < MAX_WIIMOTES; ++i)
-    if (WIIMOTE_SRC_REAL & g_wiimote_sources[i] && !g_wiimotes[i])
+    if (WiimoteCommon::GetSource(i) == WiimoteSource::Real && !g_wiimotes[i])
       ++wanted_wiimotes;
 
   return wanted_wiimotes;
@@ -488,7 +526,7 @@ static unsigned int CalculateWantedBB()
 {
   std::lock_guard<std::mutex> lk(g_wiimotes_mutex);
   unsigned int wanted_bb = 0;
-  if (WIIMOTE_SRC_REAL & g_wiimote_sources[WIIMOTE_BALANCE_BOARD] &&
+  if (WiimoteCommon::GetSource(WIIMOTE_BALANCE_BOARD) == WiimoteSource::Real &&
       !g_wiimotes[WIIMOTE_BALANCE_BOARD])
     ++wanted_bb;
   return wanted_bb;
@@ -556,6 +594,8 @@ void WiimoteScanner::ThreadFunc()
   {
     m_scan_mode_changed_event.WaitFor(std::chrono::milliseconds(500));
 
+    ProcessWiimotePool();
+
     CheckForDisconnectedWiimotes();
 
     if (m_scan_mode.load() == WiimoteScanMode::DO_NOT_SCAN)
@@ -619,9 +659,15 @@ bool Wiimote::Connect(int index)
 
   if (!m_run_thread.IsSet())
   {
+    m_run_thread.Set();
     StartThread();
     m_thread_ready_event.Wait();
   }
+  else
+  {
+    IOWakeup();
+  }
+
   return IsConnected();
 }
 
@@ -652,7 +698,6 @@ void Wiimote::ThreadFunc()
   }
 
   m_thread_ready_event.Set();
-  m_run_thread.Set();
 
   if (!ok)
   {
@@ -698,16 +743,16 @@ void LoadSettings()
     IniFile::Section& sec = *inifile.GetOrCreateSection(secname);
 
     unsigned int source = 0;
-    sec.Get("Source", &source, i ? WIIMOTE_SRC_NONE : WIIMOTE_SRC_EMU);
+    sec.Get("Source", &source, i ? int(WiimoteSource::None) : int(WiimoteSource::Emulated));
-    g_wiimote_sources[i] = source;
+    WiimoteCommon::SetSource(i, WiimoteSource(source));
   }
 
   std::string secname("BalanceBoard");
   IniFile::Section& sec = *inifile.GetOrCreateSection(secname);
 
   unsigned int bb_source = 0;
-  sec.Get("Source", &bb_source, WIIMOTE_SRC_NONE);
+  sec.Get("Source", &bb_source, int(WiimoteSource::None));
-  g_wiimote_sources[WIIMOTE_BALANCE_BOARD] = bb_source;
+  WiimoteCommon::SetSource(WIIMOTE_BALANCE_BOARD, WiimoteSource(bb_source));
 }
 
 // config dialog calls this when some settings change
@@ -779,43 +824,10 @@ void Pause()
       wiimote->EmuPause();
 }
 
-void ChangeWiimoteSource(unsigned int index, int source)
-{
-  const int previous_source = g_wiimote_sources[index];
-
-  if (previous_source == source)
-  {
-    // No change. Do nothing.
-    return;
-  }
-
-  g_wiimote_sources[index] = source;
-
-  {
-    // Kill real wiimote connection (if any) (or swap to different slot)
-    std::lock_guard<std::mutex> lk(g_wiimotes_mutex);
-    if (auto removed_wiimote = std::move(g_wiimotes[index]))
-    {
-      // See if we can use this real Wiimote in another slot.
-      // Otherwise it will be disconnected.
-      TryToConnectWiimote(std::move(removed_wiimote));
-    }
-  }
-
-  // Reconnect to the emulator.
-  Core::RunAsCPUThread([index, previous_source, source] {
-    if (previous_source != WIIMOTE_SRC_NONE)
-      ::Wiimote::Connect(index, false);
-
-    if (source == WIIMOTE_SRC_EMU)
-      ::Wiimote::Connect(index, true);
-  });
-}
-
 // Called from the Wiimote scanner thread (or UI thread on source change)
 static bool TryToConnectWiimoteToSlot(std::unique_ptr<Wiimote>& wm, unsigned int i)
 {
-  if (WIIMOTE_SRC_REAL != g_wiimote_sources[i] || g_wiimotes[i])
+  if (WiimoteCommon::GetSource(i) != WiimoteSource::Real || g_wiimotes[i])
     return false;
 
   if (!wm->Connect(i))
@@ -840,7 +852,12 @@ static void TryToConnectWiimote(std::unique_ptr<Wiimote> wm)
       return;
   }
 
-  NOTICE_LOG(WIIMOTE, "No open slot for real wiimote.");
+  INFO_LOG(WIIMOTE, "No open slot for real wiimote, adding it to the pool.");
+  wm->Connect(0);
+  // Turn on LED 1 and 4 to make it apparant this remote is in the pool.
+  const u8 led_value = u8(LED::LED_1) | u8(LED::LED_4);
+  wm->QueueReport(OutputReportID::LED, &led_value, 1);
+  g_wiimote_pool.emplace_back(WiimotePoolEntry{std::move(wm)});
 }
 
 static void TryToConnectBalanceBoard(std::unique_ptr<Wiimote> wm)
@@ -927,4 +944,27 @@ bool IsNewWiimote(const std::string& identifier)
   return s_known_ids.count(identifier) == 0;
 }
 
+void HandleWiimoteSourceChange(unsigned int index)
+{
+  std::lock_guard<std::mutex> wm_lk(g_wiimotes_mutex);
+
+  if (WiimoteCommon::GetSource(index) != WiimoteSource::Real)
+  {
+    if (auto removed_wiimote = std::move(g_wiimotes[index]))
+    {
+      removed_wiimote->EmuStop();
+      // Try to use this removed wiimote in another slot.
+      TryToConnectWiimote(std::move(removed_wiimote));
+    }
+  }
+  else if (WiimoteCommon::GetSource(index) == WiimoteSource::Real)
+  {
+    // Try to fill this slot from the pool.
+    if (!g_wiimote_pool.empty())
+    {
+      if (TryToConnectWiimoteToSlot(g_wiimote_pool.front().wiimote, index))
+        g_wiimote_pool.erase(g_wiimote_pool.begin());
+    }
+  }
+}
 };  // namespace WiimoteReal

Source/Core/Core/HW/WiimoteReal/WiimoteReal.h

@@ -192,12 +192,12 @@ void ControlChannel(int wiimote_number, u16 channel_id, const void* data, u32 si
 void Update(int wiimote_number);
 bool CheckForButtonPress(int wiimote_number);
 
-void ChangeWiimoteSource(unsigned int index, int source);
-
 bool IsValidDeviceName(const std::string& name);
 bool IsBalanceBoardName(const std::string& name);
 bool IsNewWiimote(const std::string& identifier);
 
+void HandleWiimoteSourceChange(unsigned int wiimote_number);
+
 #ifdef ANDROID
 void InitAdapterClass();
 #endif

Source/Core/Core/IOS/USB/Bluetooth/BTEmu.cpp

@@ -67,7 +67,7 @@ BluetoothEmu::BluetoothEmu(Kernel& ios, const std::string& device_name)
 
     DEBUG_LOG(IOS_WIIMOTE, "Wii Remote %d BT ID %x,%x,%x,%x,%x,%x", i, tmp_bd[0], tmp_bd[1],
               tmp_bd[2], tmp_bd[3], tmp_bd[4], tmp_bd[5]);
-    m_wiimotes.emplace_back(this, i, tmp_bd, g_wiimote_sources[i] != WIIMOTE_SRC_NONE);
+    m_wiimotes.emplace_back(this, i, tmp_bd, WiimoteCommon::GetSource(i) != WiimoteSource::None);
     i++;
   }
 

Source/Core/Core/Movie.cpp

@@ -160,7 +160,7 @@ std::string GetInputDisplay()
     {
       if (SerialInterface::GetDeviceType(i) != SerialInterface::SIDEVICE_NONE)
         s_controllers |= (1 << i);
-      if (g_wiimote_sources[i] != WIIMOTE_SRC_NONE)
+      if (WiimoteCommon::GetSource(i) != WiimoteSource::None)
         s_controllers |= (1 << (i + 4));
     }
   }
@@ -463,7 +463,7 @@ void ChangeWiiPads(bool instantly)
   int controllers = 0;
 
   for (int i = 0; i < MAX_WIIMOTES; ++i)
-    if (g_wiimote_sources[i] != WIIMOTE_SRC_NONE)
+    if (WiimoteCommon::GetSource(i) != WiimoteSource::None)
       controllers |= (1 << i);
 
   // This is important for Wiimotes, because they can desync easily if they get re-activated
@@ -478,7 +478,7 @@ void ChangeWiiPads(bool instantly)
   {
     const bool is_using_wiimote = IsUsingWiimote(i);
 
-    g_wiimote_sources[i] = is_using_wiimote ? WIIMOTE_SRC_EMU : WIIMOTE_SRC_NONE;
+    WiimoteCommon::SetSource(i, is_using_wiimote ? WiimoteSource::Emulated : WiimoteSource::None);
     if (!SConfig::GetInstance().m_bt_passthrough_enabled && bt)
       bt->AccessWiimoteByIndex(i)->Activate(is_using_wiimote);
   }

Source/Core/Core/NetPlayClient.cpp

@@ -1510,7 +1510,10 @@ bool NetPlayClient::StartGame(const std::string& path)
   }
 
   for (unsigned int i = 0; i < 4; ++i)
-    WiimoteReal::ChangeWiimoteSource(i, m_wiimote_map[i] > 0 ? WIIMOTE_SRC_EMU : WIIMOTE_SRC_NONE);
+  {
+    WiimoteCommon::SetSource(i,
+                             m_wiimote_map[i] > 0 ? WiimoteSource::Emulated : WiimoteSource::None);
+  }
 
   // boot game
   m_dialog->BootGame(path);

Source/Core/DolphinQt/Config/ControllersWindow.cpp

@@ -489,11 +489,13 @@ void ControllersWindow::LoadSettings()
       m_gc_controller_boxes[i]->setCurrentIndex(*gc_index);
       m_gc_buttons[i]->setEnabled(*gc_index != 0 && *gc_index != 6);
     }
-    m_wiimote_boxes[i]->setCurrentIndex(g_wiimote_sources[i]);
+
-    m_wiimote_buttons[i]->setEnabled(g_wiimote_sources[i] != 0 && g_wiimote_sources[i] != 2);
+    const WiimoteSource source = WiimoteCommon::GetSource(int(i));
+    m_wiimote_boxes[i]->setCurrentIndex(int(source));
+    m_wiimote_buttons[i]->setEnabled(source == WiimoteSource::Emulated);
   }
-  m_wiimote_real_balance_board->setChecked(g_wiimote_sources[WIIMOTE_BALANCE_BOARD] ==
+  m_wiimote_real_balance_board->setChecked(WiimoteCommon::GetSource(WIIMOTE_BALANCE_BOARD) ==
-                                           WIIMOTE_SRC_REAL);
+                                           WiimoteSource::Real);
   m_wiimote_speaker_data->setChecked(SConfig::GetInstance().m_WiimoteEnableSpeaker);
   m_wiimote_continuous_scanning->setChecked(SConfig::GetInstance().m_WiimoteContinuousScanning);
 
@@ -514,15 +516,15 @@ void ControllersWindow::SaveSettings()
   SConfig::GetInstance().m_bt_passthrough_enabled = m_wiimote_passthrough->isChecked();
   SConfig::GetInstance().m_BackgroundInput = m_common_bg_input->isChecked();
 
-  WiimoteReal::ChangeWiimoteSource(WIIMOTE_BALANCE_BOARD,
+  WiimoteCommon::SetSource(WIIMOTE_BALANCE_BOARD, m_wiimote_real_balance_board->isChecked() ?
-                                   m_wiimote_real_balance_board->isChecked() ? WIIMOTE_SRC_REAL :
+                                                      WiimoteSource::Real :
-                                                                               WIIMOTE_SRC_NONE);
+                                                      WiimoteSource::None);
 
   for (size_t i = 0; i < m_wiimote_groups.size(); i++)
   {
-    const int index = m_wiimote_boxes[i]->currentIndex();
+    const auto source = WiimoteSource(m_wiimote_boxes[i]->currentIndex());
-    m_wiimote_buttons[i]->setEnabled(index != 0 && index != 2);
+    m_wiimote_buttons[i]->setEnabled(source == WiimoteSource::Emulated);
-    WiimoteReal::ChangeWiimoteSource(static_cast<u32>(i), index);
+    WiimoteCommon::SetSource(static_cast<u32>(i), source);
   }
 
   UICommon::SaveWiimoteSources();

Source/Core/DolphinQt/MainWindow.cpp

@@ -115,6 +115,8 @@
 
 #if defined(HAVE_XRANDR) && HAVE_XRANDR
 #include "UICommon/X11Utils.h"
+// This #define within X11/X.h conflicts with our WiimoteSource enum.
+#undef None
 #endif
 
 #if defined(__unix__) || defined(__unix) || defined(__APPLE__)
@@ -1593,7 +1595,7 @@ void MainWindow::OnStartRecording()
     if (SerialInterface::SIDevice_IsGCController(SConfig::GetInstance().m_SIDevice[i]))
       controllers |= (1 << i);
 
-    if (g_wiimote_sources[i] != WIIMOTE_SRC_NONE)
+    if (WiimoteCommon::GetSource(i) != WiimoteSource::None)
       controllers |= (1 << (i + 4));
   }
 
@@ -1660,7 +1662,7 @@ void MainWindow::ShowTASInput()
 
   for (int i = 0; i < num_wii_controllers; i++)
   {
-    if (g_wiimote_sources[i] == WIIMOTE_SRC_EMU &&
+    if (WiimoteCommon::GetSource(i) == WiimoteSource::Emulated &&
         (!Core::IsRunning() || SConfig::GetInstance().bWii))
     {
       m_wii_tas_input_windows[i]->show();

Source/Core/UICommon/UICommon.cpp

@@ -367,12 +367,12 @@ void SaveWiimoteSources()
     secname += (char)('1' + i);
     IniFile::Section& sec = *inifile.GetOrCreateSection(secname);
 
-    sec.Set("Source", (int)g_wiimote_sources[i]);
+    sec.Set("Source", int(WiimoteCommon::GetSource(i)));
   }
 
   std::string secname("BalanceBoard");
   IniFile::Section& sec = *inifile.GetOrCreateSection(secname);
-  sec.Set("Source", (int)g_wiimote_sources[WIIMOTE_BALANCE_BOARD]);
+  sec.Set("Source", int(WiimoteCommon::GetSource(WIIMOTE_BALANCE_BOARD)));
 
   inifile.Save(ini_filename);
 }