Get rid of GetUsbPointer for emulated Bluetooth

It held a raw pointer to a IOS::HLE::Device::BluetoothEmu that is not
guaranteed to exist (and of course, nothing checked that it wasn't
nullptr), but what is more, it's totally unnecessary because we have
IOS::HLE::GetDeviceByName().

Since we cannot always inform the host that Wii remotes are
disconnected from ES, that is now done in BluetoothEmu's destructor.

Source/Core/Core/Core.cpp

@@ -528,9 +528,11 @@ void EmuThread()
       Wiimote::LoadConfig();
 
     // Activate Wiimotes which don't have source set to "None"
+    const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+        IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
     for (unsigned int i = 0; i != MAX_BBMOTES; ++i)
-      if (g_wiimote_sources[i])
-        IOS::HLE::GetUsbPointer()->AccessWiiMote(i | 0x100)->Activate(true);
+      if (g_wiimote_sources[i] && bt)
+        bt->AccessWiiMote(i | 0x100)->Activate(true);
   }
 
   AudioCommon::InitSoundStream();

Source/Core/Core/IOS/ES/ES.cpp

@@ -1201,29 +1201,30 @@ IPCCommandResult ES::LaunchBC(const IOCtlVRequest& request)
 
 void ES::ResetAfterLaunch(const u64 ios_to_load) const
 {
+  auto bt = std::static_pointer_cast<BluetoothEmu>(GetDeviceByName("/dev/usb/oh1/57e/305"));
   bool* wiiMoteConnected = new bool[MAX_BBMOTES];
-  if (!SConfig::GetInstance().m_bt_passthrough_enabled)
+  if (!SConfig::GetInstance().m_bt_passthrough_enabled && bt)
   {
-    BluetoothEmu* s_Usb = GetUsbPointer();
     for (unsigned int i = 0; i < MAX_BBMOTES; i++)
-      wiiMoteConnected[i] = s_Usb->m_WiiMotes[i].IsConnected();
+      wiiMoteConnected[i] = bt->m_WiiMotes[i].IsConnected();
   }
 
   Reload(ios_to_load);
 
-  if (!SConfig::GetInstance().m_bt_passthrough_enabled)
+  // Get the new Bluetooth device. Note that it is not guaranteed to exist.
+  bt = std::static_pointer_cast<BluetoothEmu>(GetDeviceByName("/dev/usb/oh1/57e/305"));
+  if (!SConfig::GetInstance().m_bt_passthrough_enabled && bt)
   {
-    BluetoothEmu* s_Usb = GetUsbPointer();
     for (unsigned int i = 0; i < MAX_BBMOTES; i++)
     {
       if (wiiMoteConnected[i])
       {
-        s_Usb->m_WiiMotes[i].Activate(false);
-        s_Usb->m_WiiMotes[i].Activate(true);
+        bt->m_WiiMotes[i].Activate(false);
+        bt->m_WiiMotes[i].Activate(true);
       }
       else
       {
-        s_Usb->m_WiiMotes[i].Activate(false);
+        bt->m_WiiMotes[i].Activate(false);
       }
     }
   }

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

@@ -50,7 +50,6 @@ BluetoothEmu::BluetoothEmu(u32 device_id, const std::string& device_name)
   // Activate only first Wii Remote by default
 
   _conf_pads BT_DINF;
-  SetUsbPointer(this);
   if (!sysconf.GetArrayData("BT.DINF", (u8*)&BT_DINF, sizeof(_conf_pads)))
   {
     PanicAlertT("Trying to read from invalid SYSCONF\nWii Remote Bluetooth IDs are not available");
@@ -103,8 +102,8 @@ BluetoothEmu::BluetoothEmu(u32 device_id, const std::string& device_name)
 
 BluetoothEmu::~BluetoothEmu()
 {
+  Host_SetWiiMoteConnectionState(0);
   m_WiiMotes.clear();
-  SetUsbPointer(nullptr);
 }
 
 template <typename T>

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

@@ -25,18 +25,6 @@ namespace IOS
 {
 namespace HLE
 {
-static Device::BluetoothEmu* s_Usb = nullptr;
-
-Device::BluetoothEmu* GetUsbPointer()
-{
-  return s_Usb;
-}
-
-void SetUsbPointer(Device::BluetoothEmu* ptr)
-{
-  s_Usb = ptr;
-}
-
 WiimoteDevice::WiimoteDevice(Device::BluetoothEmu* host, int number, bdaddr_t bd, bool ready)
     : m_BD(bd),
       m_Name(number == WIIMOTE_BALANCE_BOARD ? "Nintendo RVL-WBC-01" : "Nintendo RVL-CNT-01"),
@@ -943,6 +931,9 @@ void Callback_WiimoteInterruptChannel(int _number, u16 _channelID, const void* _
   DEBUG_LOG(WIIMOTE, "   Data: %s", ArrayToString(pData, _Size, 50).c_str());
   DEBUG_LOG(WIIMOTE, "   Channel: %x", _channelID);
 
-  IOS::HLE::s_Usb->m_WiiMotes[_number].ReceiveL2capData(_channelID, _pData, _Size);
+  const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+      IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
+  if (bt)
+    bt->m_WiiMotes[_number].ReceiveL2capData(_channelID, _pData, _Size);
 }
 }

Source/Core/Core/IOS/USB/Bluetooth/WiimoteDevice.h

@@ -23,9 +23,6 @@ namespace Device
 class BluetoothEmu;
 }
 
-Device::BluetoothEmu* GetUsbPointer();
-void SetUsbPointer(Device::BluetoothEmu* ptr);
-
 class CBigEndianBuffer
 {
 public:

Source/Core/Core/Movie.cpp

@@ -521,11 +521,13 @@ void ChangeWiiPads(bool instantly)
   if (instantly && (s_controllers >> 4) == controllers)
     return;
 
+  const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+      IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
   for (int i = 0; i < MAX_WIIMOTES; ++i)
   {
     g_wiimote_sources[i] = IsUsingWiimote(i) ? WIIMOTE_SRC_EMU : WIIMOTE_SRC_NONE;
-    if (!SConfig::GetInstance().m_bt_passthrough_enabled)
-      IOS::HLE::GetUsbPointer()->AccessWiiMote(i | 0x100)->Activate(IsUsingWiimote(i));
+    if (!SConfig::GetInstance().m_bt_passthrough_enabled && bt)
+      bt->AccessWiiMote(i | 0x100)->Activate(IsUsingWiimote(i));
   }
 }
 

Source/Core/DolphinWX/FrameTools.cpp

@@ -1245,7 +1245,10 @@ void CFrame::ConnectWiimote(int wm_idx, bool connect)
       !SConfig::GetInstance().m_bt_passthrough_enabled)
   {
     bool was_unpaused = Core::PauseAndLock(true);
-    IOS::HLE::GetUsbPointer()->AccessWiiMote(wm_idx | 0x100)->Activate(connect);
+    const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+        IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
+    if (bt)
+      bt->AccessWiiMote(wm_idx | 0x100)->Activate(connect);
     const char* message = connect ? "Wii Remote %i connected" : "Wii Remote %i disconnected";
     Core::DisplayMessage(StringFromFormat(message, wm_idx + 1), 3000);
     Host_UpdateMainFrame();
@@ -1258,10 +1261,11 @@ void CFrame::OnConnectWiimote(wxCommandEvent& event)
   if (SConfig::GetInstance().m_bt_passthrough_enabled)
     return;
   bool was_unpaused = Core::PauseAndLock(true);
-  ConnectWiimote(event.GetId() - IDM_CONNECT_WIIMOTE1,
-                 !IOS::HLE::GetUsbPointer()
-                      ->AccessWiiMote((event.GetId() - IDM_CONNECT_WIIMOTE1) | 0x100)
-                      ->IsConnected());
+  const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+      IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
+  const bool is_connected =
+      bt && bt->AccessWiiMote((event.GetId() - IDM_CONNECT_WIIMOTE1) | 0x100)->IsConnected();
+  ConnectWiimote(event.GetId() - IDM_CONNECT_WIIMOTE1, !is_connected);
   Core::PauseAndLock(false, was_unpaused);
 }
 
@@ -1416,8 +1420,9 @@ void CFrame::UpdateGUI()
   // Tools
   GetMenuBar()->FindItem(IDM_CHEATS)->Enable(SConfig::GetInstance().bEnableCheats);
 
-  bool ShouldEnableWiimotes =
-      Running && SConfig::GetInstance().bWii && !SConfig::GetInstance().m_bt_passthrough_enabled;
+  const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+      IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
+  bool ShouldEnableWiimotes = Running && bt && !SConfig::GetInstance().m_bt_passthrough_enabled;
   GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE1)->Enable(ShouldEnableWiimotes);
   GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE2)->Enable(ShouldEnableWiimotes);
   GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE3)->Enable(ShouldEnableWiimotes);
@@ -1426,21 +1431,13 @@ void CFrame::UpdateGUI()
   if (ShouldEnableWiimotes)
   {
     bool was_unpaused = Core::PauseAndLock(true);
-    GetMenuBar()
-        ->FindItem(IDM_CONNECT_WIIMOTE1)
-        ->Check(IOS::HLE::GetUsbPointer()->AccessWiiMote(0x0100)->IsConnected());
-    GetMenuBar()
-        ->FindItem(IDM_CONNECT_WIIMOTE2)
-        ->Check(IOS::HLE::GetUsbPointer()->AccessWiiMote(0x0101)->IsConnected());
-    GetMenuBar()
-        ->FindItem(IDM_CONNECT_WIIMOTE3)
-        ->Check(IOS::HLE::GetUsbPointer()->AccessWiiMote(0x0102)->IsConnected());
-    GetMenuBar()
-        ->FindItem(IDM_CONNECT_WIIMOTE4)
-        ->Check(IOS::HLE::GetUsbPointer()->AccessWiiMote(0x0103)->IsConnected());
+    GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE1)->Check(bt->AccessWiiMote(0x0100)->IsConnected());
+    GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE2)->Check(bt->AccessWiiMote(0x0101)->IsConnected());
+    GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE3)->Check(bt->AccessWiiMote(0x0102)->IsConnected());
+    GetMenuBar()->FindItem(IDM_CONNECT_WIIMOTE4)->Check(bt->AccessWiiMote(0x0103)->IsConnected());
     GetMenuBar()
         ->FindItem(IDM_CONNECT_BALANCEBOARD)
-        ->Check(IOS::HLE::GetUsbPointer()->AccessWiiMote(0x0104)->IsConnected());
+        ->Check(bt->AccessWiiMote(0x0104)->IsConnected());
     Core::PauseAndLock(false, was_unpaused);
   }
 

Source/Core/DolphinWX/MainNoGUI.cpp

@@ -143,7 +143,10 @@ void Host_ConnectWiimote(int wm_idx, bool connect)
   {
     Core::QueueHostJob([=] {
       bool was_unpaused = Core::PauseAndLock(true);
-      IOS::HLE::GetUsbPointer()->AccessWiiMote(wm_idx | 0x100)->Activate(connect);
+      const auto bt = std::static_pointer_cast<IOS::HLE::Device::BluetoothEmu>(
+          IOS::HLE::GetDeviceByName("/dev/usb/oh1/57e/305"));
+      if (bt)
+        bt->AccessWiiMote(wm_idx | 0x100)->Activate(connect);
       Host_UpdateMainFrame();
       Core::PauseAndLock(false, was_unpaused);
     });