Wiimote: Separate the Input system state update from the emulated state update.

Source/Core/Core/HW/WiimoteCommon/WiimoteHid.h

@@ -7,6 +7,11 @@
 #include "Core/HW/WiimoteCommon/WiimoteConstants.h"
 #include "Core/HW/WiimoteCommon/WiimoteReport.h"
 
+namespace WiimoteEmu
+{
+struct DesiredWiimoteState;
+}
+
 namespace WiimoteCommon
 {
 // Source: HID_010_SPC_PFL/1.0 (official HID specification)
@@ -34,7 +39,8 @@ public:
   virtual void SetWiimoteDeviceIndex(u8 index) = 0;
 
   // Called every ~200hz after HID channels are established.
-  virtual void Update() = 0;
+  virtual void PrepareInput(WiimoteEmu::DesiredWiimoteState* target_state) = 0;
+  virtual void Update(const WiimoteEmu::DesiredWiimoteState& target_state) = 0;
 
   void SetInterruptCallback(InterruptCallbackType callback) { m_callback = std::move(callback); }
 
@@ -42,8 +48,10 @@ public:
   // Does not include HID-type header.
   virtual void InterruptDataOutput(const u8* data, u32 size) = 0;
 
-  // Used to connect a disconnected wii remote on button press.
-  virtual bool IsButtonPressed() = 0;
+  // Get a snapshot of the current state of the Wiimote's buttons.
+  // Note that only the button bits of the return value are meaningful, the rest should be ignored.
+  // This is used to query a disconnected Wiimote whether it wants to reconnect.
+  virtual ButtonData GetCurrentlyPressedButtons() = 0;
 
 protected:
   void InterruptDataInputCallback(const u8* data, u32 size)

Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.cpp

@@ -448,7 +448,7 @@ void Wiimote::UpdateButtonsStatus(const DesiredWiimoteState& target_state)
   m_status.buttons.hex = target_state.buttons.hex & ButtonData::BUTTON_MASK;
 }
 
-DesiredWiimoteState Wiimote::BuildDesiredWiimoteState()
+void Wiimote::BuildDesiredWiimoteState(DesiredWiimoteState* target_state)
 {
   // Hotkey / settings modifier
   // Data is later accessed in IsSideways and IsUpright
@@ -457,36 +457,35 @@ DesiredWiimoteState Wiimote::BuildDesiredWiimoteState()
   // Update our motion simulations.
   StepDynamics();
 
-  DesiredWiimoteState wiimote_state;
-
   // Fetch pressed buttons from user input.
-  m_buttons->GetState(&wiimote_state.buttons.hex, button_bitmasks);
-  m_dpad->GetState(&wiimote_state.buttons.hex,
+  target_state->buttons.hex = 0;
+  m_buttons->GetState(&target_state->buttons.hex, button_bitmasks);
+  m_dpad->GetState(&target_state->buttons.hex,
                    IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks);
 
   // Calculate accelerometer state.
   // Calibration values are 8-bit but we want 10-bit precision, so << 2.
-  wiimote_state.acceleration =
+  target_state->acceleration =
       ConvertAccelData(GetTotalAcceleration(), ACCEL_ZERO_G << 2, ACCEL_ONE_G << 2);
 
   // Calculate IR camera state.
-  wiimote_state.camera_points = CameraLogic::GetCameraPoints(
+  target_state->camera_points = CameraLogic::GetCameraPoints(
       GetTotalTransformation(),
       Common::Vec2(m_fov_x_setting.GetValue(), m_fov_y_setting.GetValue()) / 360 *
           float(MathUtil::TAU));
 
   // Calculate MotionPlus state.
   if (m_motion_plus_setting.GetValue())
-    wiimote_state.motion_plus = MotionPlus::GetGyroscopeData(GetTotalAngularVelocity());
+    target_state->motion_plus = MotionPlus::GetGyroscopeData(GetTotalAngularVelocity());
+  else
+    target_state->motion_plus = std::nullopt;
 
   // Build Extension state.
   // This also allows the extension to perform any regular duties it may need.
   // (e.g. Nunchuk motion simulation step)
   static_cast<Extension*>(
       m_attachments->GetAttachmentList()[m_attachments->GetSelectedAttachment()].get())
-      ->BuildDesiredExtensionState(&wiimote_state.extension);
-
-  return wiimote_state;
+      ->BuildDesiredExtensionState(&target_state->extension);
 }
 
 u8 Wiimote::GetWiimoteDeviceIndex() const
@@ -500,13 +499,14 @@ void Wiimote::SetWiimoteDeviceIndex(u8 index)
 }
 
 // This is called every ::Wiimote::UPDATE_FREQ (200hz)
-void Wiimote::Update()
+void Wiimote::PrepareInput(WiimoteEmu::DesiredWiimoteState* target_state)
 {
   const auto lock = GetStateLock();
+  BuildDesiredWiimoteState(target_state);
+}
 
-  // Build target state.
-  auto target_state = BuildDesiredWiimoteState();
-
+void Wiimote::Update(const WiimoteEmu::DesiredWiimoteState& target_state)
+{
   // Update buttons in the status struct which is sent in 99% of input reports.
   UpdateButtonsStatus(target_state);
 
@@ -656,14 +656,15 @@ void Wiimote::SendDataReport(const DesiredWiimoteState& target_state)
     m_reporting_mode = InputReportID::ReportInterleave1;
 }
 
-bool Wiimote::IsButtonPressed()
+ButtonData Wiimote::GetCurrentlyPressedButtons()
 {
-  u16 buttons = 0;
   const auto lock = GetStateLock();
-  m_buttons->GetState(&buttons, button_bitmasks);
-  m_dpad->GetState(&buttons, dpad_bitmasks);
 
-  return buttons != 0;
+  ButtonData buttons{};
+  m_buttons->GetState(&buttons.hex, button_bitmasks);
+  m_dpad->GetState(&buttons.hex, IsSideways() ? dpad_sideways_bitmasks : dpad_bitmasks);
+
+  return buttons;
 }
 
 void Wiimote::LoadDefaults(const ControllerInterface& ciface)

Source/Core/Core/HW/WiimoteEmu/WiimoteEmu.h

@@ -132,11 +132,12 @@ public:
   u8 GetWiimoteDeviceIndex() const override;
   void SetWiimoteDeviceIndex(u8 index) override;
 
-  void Update() override;
+  void PrepareInput(WiimoteEmu::DesiredWiimoteState* target_state) override;
+  void Update(const WiimoteEmu::DesiredWiimoteState& target_state) override;
   void EventLinked() override;
   void EventUnlinked() override;
   void InterruptDataOutput(const u8* data, u32 size) override;
-  bool IsButtonPressed() override;
+  WiimoteCommon::ButtonData GetCurrentlyPressedButtons() override;
 
   void Reset();
 
@@ -157,7 +158,7 @@ private:
 
   void StepDynamics();
   void UpdateButtonsStatus(const DesiredWiimoteState& target_state);
-  DesiredWiimoteState BuildDesiredWiimoteState();
+  void BuildDesiredWiimoteState(DesiredWiimoteState* target_state);
 
   // Returns simulated accelerometer data in m/s^2.
   Common::Vec3 GetAcceleration(

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

@@ -460,7 +460,12 @@ void Wiimote::SetWiimoteDeviceIndex(u8 index)
   m_bt_device_index = index;
 }
 
-void Wiimote::Update()
+void Wiimote::PrepareInput(WiimoteEmu::DesiredWiimoteState* target_state)
+{
+  // Nothing to do here on real Wiimotes.
+}
+
+void Wiimote::Update(const WiimoteEmu::DesiredWiimoteState& target_state)
 {
   // Wii remotes send input at 200hz once a Wii enables "sniff mode" on the connection.
   // PC bluetooth stacks do not enable sniff mode causing remotes to send input at only 100hz.
@@ -485,7 +490,7 @@ void Wiimote::Update()
                     u32(rpt.size() - REPORT_HID_HEADER_SIZE));
 }
 
-bool Wiimote::IsButtonPressed()
+ButtonData Wiimote::GetCurrentlyPressedButtons()
 {
   Report& rpt = m_last_input_report;
   if (rpt.size() >= 4)
@@ -499,10 +504,10 @@ bool Wiimote::IsButtonPressed()
       ButtonData buttons = {};
       builder->GetCoreData(&buttons);
 
-      return buttons.hex != 0;
+      return buttons;
     }
   }
-  return false;
+  return ButtonData{};
 }
 
 void Wiimote::Prepare()

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

@@ -66,10 +66,11 @@ public:
   u8 GetWiimoteDeviceIndex() const override;
   void SetWiimoteDeviceIndex(u8 index) override;
 
-  void Update() override;
+  void PrepareInput(WiimoteEmu::DesiredWiimoteState* target_state) override;
+  void Update(const WiimoteEmu::DesiredWiimoteState& target_state) override;
   void EventLinked() override;
   void EventUnlinked() override;
-  bool IsButtonPressed() override;
+  WiimoteCommon::ButtonData GetCurrentlyPressedButtons() override;
 
   void EmuStop();
 

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

@@ -19,6 +19,7 @@
 #include "Core/HW/Memmap.h"
 #include "Core/HW/SystemTimers.h"
 #include "Core/HW/Wiimote.h"
+#include "Core/HW/WiimoteEmu/DesiredWiimoteState.h"
 #include "Core/IOS/Device.h"
 #include "Core/IOS/IOS.h"
 #include "Core/SysConf.h"
@@ -58,7 +59,7 @@ BluetoothEmuDevice::BluetoothEmuDevice(Kernel& ios, const std::string& device_na
     DEBUG_LOG_FMT(IOS_WIIMOTE, "Wii Remote {} 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(std::make_unique<WiimoteDevice>(this, tmp_bd, i));
+    m_wiimotes[i] = std::make_unique<WiimoteDevice>(this, tmp_bd, i);
   }
 
   bt_dinf.num_registered = MAX_BBMOTES;
@@ -340,8 +341,16 @@ void BluetoothEmuDevice::Update()
   {
     g_controller_interface.SetCurrentInputChannel(ciface::InputChannel::Bluetooth);
     g_controller_interface.UpdateInput();
-    for (auto& wiimote : m_wiimotes)
-      wiimote->UpdateInput();
+
+    std::array<WiimoteEmu::DesiredWiimoteState, MAX_BBMOTES> wiimote_states;
+    std::array<WiimoteDevice::NextUpdateInputCall, MAX_BBMOTES> next_call;
+
+    for (size_t i = 0; i < m_wiimotes.size(); ++i)
+      next_call[i] = m_wiimotes[i]->PrepareInput(&wiimote_states[i]);
+
+    for (size_t i = 0; i < m_wiimotes.size(); ++i)
+      m_wiimotes[i]->UpdateInput(next_call[i], wiimote_states[i]);
+
     m_last_ticks = now;
   }
 

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

@@ -60,7 +60,7 @@ public:
   void DoState(PointerWrap& p) override;
 
 private:
-  std::vector<std::unique_ptr<WiimoteDevice>> m_wiimotes;
+  std::array<std::unique_ptr<WiimoteDevice>, MAX_BBMOTES> m_wiimotes;
 
   bdaddr_t m_controller_bd{{0x11, 0x02, 0x19, 0x79, 0x00, 0xff}};
 

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

@@ -21,6 +21,7 @@
 #include "Core/HW/Wiimote.h"
 #include "Core/HW/WiimoteCommon/WiimoteConstants.h"
 #include "Core/HW/WiimoteCommon/WiimoteHid.h"
+#include "Core/HW/WiimoteEmu/DesiredWiimoteState.h"
 #include "Core/Host.h"
 #include "Core/IOS/USB/Bluetooth/BTEmu.h"
 #include "Core/IOS/USB/Bluetooth/WiimoteHIDAttr.h"
@@ -341,25 +342,51 @@ void WiimoteDevice::Update()
   }
 }
 
-void WiimoteDevice::UpdateInput()
+WiimoteDevice::NextUpdateInputCall
+WiimoteDevice::PrepareInput(WiimoteEmu::DesiredWiimoteState* wiimote_state)
 {
   if (m_connection_request_counter)
     --m_connection_request_counter;
 
   if (!IsSourceValid())
-    return;
+    return NextUpdateInputCall::None;
 
-  // Allow button press to trigger activation after a second of no connection activity.
-  if (!m_connection_request_counter && m_baseband_state == BasebandState::Inactive)
+  if (m_baseband_state == BasebandState::Inactive)
   {
-    if (Wiimote::NetPlay_GetButtonPress(GetNumber(), m_hid_source->IsButtonPressed()))
-      Activate(true);
+    // Allow button press to trigger activation after a second of no connection activity.
+    if (!m_connection_request_counter)
+    {
+      wiimote_state->buttons = m_hid_source->GetCurrentlyPressedButtons();
+      return NextUpdateInputCall::Activate;
+    }
+    return NextUpdateInputCall::None;
   }
 
   // Verify interrupt channel is connected and configured.
   const auto* channel = FindChannelWithPSM(L2CAP_PSM_HID_INTR);
   if (channel && channel->IsComplete())
-    m_hid_source->Update();
+  {
+    m_hid_source->PrepareInput(wiimote_state);
+    return NextUpdateInputCall::Update;
+  }
+  return NextUpdateInputCall::None;
+}
+
+void WiimoteDevice::UpdateInput(NextUpdateInputCall next_call,
+                                const WiimoteEmu::DesiredWiimoteState& wiimote_state)
+{
+  switch (next_call)
+  {
+  case NextUpdateInputCall::Activate:
+    if (wiimote_state.buttons.hex & WiimoteCommon::ButtonData::BUTTON_MASK)
+      Activate(true);
+    break;
+  case NextUpdateInputCall::Update:
+    m_hid_source->Update(wiimote_state);
+    break;
+  default:
+    break;
+  }
 }
 
 // This function receives L2CAP commands from the CPU

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

@@ -13,6 +13,11 @@
 
 class PointerWrap;
 
+namespace WiimoteEmu
+{
+struct DesiredWiimoteState;
+}
+
 namespace IOS::HLE
 {
 class BluetoothEmuDevice;
@@ -38,7 +43,15 @@ public:
   void Update();
 
   // Called every ~200hz.
-  void UpdateInput();
+  enum class NextUpdateInputCall
+  {
+    None,
+    Activate,
+    Update
+  };
+  NextUpdateInputCall PrepareInput(WiimoteEmu::DesiredWiimoteState* wiimote_state);
+  void UpdateInput(NextUpdateInputCall next_call,
+                   const WiimoteEmu::DesiredWiimoteState& wiimote_state);
 
   void DoState(PointerWrap& p);