rename InputCommon/ControllerInterface/Device to CoreDevice

1 files changed, 448 insertions, 0 deletions

diff --git a/Source/Core/InputCommon/ControllerInterface/CoreDevice.cpp b/Source/Core/InputCommon/ControllerInterface/CoreDevice.cpp
new file mode 100644
index 0000000000..3a396ddf37
--- /dev/null
+++ b/Source/Core/InputCommon/ControllerInterface/CoreDevice.cpp
@@ -0,0 +1,448 @@
+// Copyright 2013 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "InputCommon/ControllerInterface/CoreDevice.h"
+
+#include <algorithm>
+#include <cmath>
+#include <memory>
+#include <sstream>
+#include <string>
+#include <tuple>
+
+#include <fmt/format.h>
+
+#include "Common/MathUtil.h"
+#include "Common/Thread.h"
+
+namespace ciface::Core
+{
+// Compared to an input's current state (ideally 1.0) minus abs(initial_state) (ideally 0.0).
+// Note: Detect() logic assumes this is greater than 0.5.
+constexpr ControlState INPUT_DETECT_THRESHOLD = 0.55;
+
+class CombinedInput final : public Device::Input
+{
+public:
+  using Inputs = std::pair<Device::Input*, Device::Input*>;
+
+  CombinedInput(std::string name, const Inputs& inputs) : m_name(std::move(name)), m_inputs(inputs)
+  {
+  }
+  ControlState GetState() const override
+  {
+    ControlState result = 0;
+
+    if (m_inputs.first)
+      result = m_inputs.first->GetState();
+
+    if (m_inputs.second)
+      result = std::max(result, m_inputs.second->GetState());
+
+    return result;
+  }
+  std::string GetName() const override { return m_name; }
+  bool IsDetectable() const override { return false; }
+  bool IsChild(const Input* input) const override
+  {
+    return m_inputs.first == input || m_inputs.second == input;
+  }
+
+private:
+  const std::string m_name;
+  const std::pair<Device::Input*, Device::Input*> m_inputs;
+};
+
+Device::~Device()
+{
+  // delete inputs
+  for (Device::Input* input : m_inputs)
+    delete input;
+
+  // delete outputs
+  for (Device::Output* output : m_outputs)
+    delete output;
+}
+
+std::optional<int> Device::GetPreferredId() const
+{
+  return {};
+}
+
+void Device::AddInput(Device::Input* const i)
+{
+  m_inputs.push_back(i);
+}
+
+void Device::AddOutput(Device::Output* const o)
+{
+  m_outputs.push_back(o);
+}
+
+std::string Device::GetQualifiedName() const
+{
+  return fmt::format("{}/{}/{}", GetSource(), GetId(), GetName());
+}
+
+auto Device::GetParentMostInput(Input* child) const -> Input*
+{
+  for (auto* input : m_inputs)
+  {
+    if (input->IsChild(child))
+    {
+      // Running recursively is currently unnecessary but it doesn't hurt.
+      return GetParentMostInput(input);
+    }
+  }
+
+  return child;
+}
+
+Device::Input* Device::FindInput(std::string_view name) const
+{
+  for (Input* input : m_inputs)
+  {
+    if (input->IsMatchingName(name))
+      return input;
+  }
+
+  return nullptr;
+}
+
+Device::Output* Device::FindOutput(std::string_view name) const
+{
+  for (Output* output : m_outputs)
+  {
+    if (output->IsMatchingName(name))
+      return output;
+  }
+
+  return nullptr;
+}
+
+bool Device::Control::IsMatchingName(std::string_view name) const
+{
+  return GetName() == name;
+}
+
+ControlState Device::FullAnalogSurface::GetState() const
+{
+  return (1 + std::max(0.0, m_high.GetState()) - std::max(0.0, m_low.GetState())) / 2;
+}
+
+std::string Device::FullAnalogSurface::GetName() const
+{
+  // E.g. "Full Axis X+"
+  return "Full " + m_high.GetName();
+}
+
+bool Device::FullAnalogSurface::IsMatchingName(std::string_view name) const
+{
+  if (Control::IsMatchingName(name))
+    return true;
+
+  // Old naming scheme was "Axis X-+" which is too visually similar to "Axis X+".
+  // This has caused countless problems for users with mysterious misconfigurations.
+  // We match this old name to support old configurations.
+  const auto old_name = m_low.GetName() + *m_high.GetName().rbegin();
+
+  return old_name == name;
+}
+
+void Device::AddCombinedInput(std::string name, const std::pair<std::string, std::string>& inputs)
+{
+  AddInput(new CombinedInput(std::move(name), {FindInput(inputs.first), FindInput(inputs.second)}));
+}
+
+//
+// DeviceQualifier :: ToString
+//
+// Get string from a device qualifier / serialize
+//
+std::string DeviceQualifier::ToString() const
+{
+  if (source.empty() && (cid < 0) && name.empty())
+    return "";
+
+  std::ostringstream ss;
+  ss << source << '/';
+  if (cid > -1)
+    ss << cid;
+  ss << '/' << name;
+
+  return ss.str();
+}
+
+//
+// DeviceQualifier :: FromString
+//
+// Set a device qualifier from a string / unserialize
+//
+void DeviceQualifier::FromString(const std::string& str)
+{
+  *this = {};
+
+  std::istringstream ss(str);
+
+  std::getline(ss, source, '/');
+
+  // silly
+  std::getline(ss, name, '/');
+  std::istringstream(name) >> cid;
+
+  std::getline(ss, name);
+}
+
+//
+// DeviceQualifier :: FromDevice
+//
+// Set a device qualifier from a device
+//
+void DeviceQualifier::FromDevice(const Device* const dev)
+{
+  name = dev->GetName();
+  cid = dev->GetId();
+  source = dev->GetSource();
+}
+
+bool DeviceQualifier::operator==(const Device* const dev) const
+{
+  if (dev->GetId() == cid)
+    if (dev->GetName() == name)
+      if (dev->GetSource() == source)
+        return true;
+
+  return false;
+}
+
+bool DeviceQualifier::operator!=(const Device* const dev) const
+{
+  return !operator==(dev);
+}
+
+bool DeviceQualifier::operator==(const DeviceQualifier& devq) const
+{
+  return std::tie(cid, name, source) == std::tie(devq.cid, devq.name, devq.source);
+}
+
+bool DeviceQualifier::operator!=(const DeviceQualifier& devq) const
+{
+  return !operator==(devq);
+}
+
+std::shared_ptr<Device> DeviceContainer::FindDevice(const DeviceQualifier& devq) const
+{
+  std::lock_guard lk(m_devices_mutex);
+  for (const auto& d : m_devices)
+  {
+    if (devq == d.get())
+      return d;
+  }
+
+  return nullptr;
+}
+
+std::vector<std::string> DeviceContainer::GetAllDeviceStrings() const
+{
+  std::lock_guard lk(m_devices_mutex);
+
+  std::vector<std::string> device_strings;
+  DeviceQualifier device_qualifier;
+
+  for (const auto& d : m_devices)
+  {
+    device_qualifier.FromDevice(d.get());
+    device_strings.emplace_back(device_qualifier.ToString());
+  }
+
+  return device_strings;
+}
+
+std::string DeviceContainer::GetDefaultDeviceString() const
+{
+  std::lock_guard lk(m_devices_mutex);
+  if (m_devices.empty())
+    return "";
+
+  DeviceQualifier device_qualifier;
+  device_qualifier.FromDevice(m_devices[0].get());
+  return device_qualifier.ToString();
+}
+
+Device::Input* DeviceContainer::FindInput(std::string_view name, const Device* def_dev) const
+{
+  if (def_dev)
+  {
+    Device::Input* const inp = def_dev->FindInput(name);
+    if (inp)
+      return inp;
+  }
+
+  std::lock_guard lk(m_devices_mutex);
+  for (const auto& d : m_devices)
+  {
+    Device::Input* const i = d->FindInput(name);
+
+    if (i)
+      return i;
+  }
+
+  return nullptr;
+}
+
+Device::Output* DeviceContainer::FindOutput(std::string_view name, const Device* def_dev) const
+{
+  return def_dev->FindOutput(name);
+}
+
+bool DeviceContainer::HasConnectedDevice(const DeviceQualifier& qualifier) const
+{
+  const auto device = FindDevice(qualifier);
+  return device != nullptr && device->IsValid();
+}
+
+// Wait for inputs on supplied devices.
+// Inputs are only considered if they are first seen in a neutral state.
+// This is useful for crazy flightsticks that have certain buttons that are always held down
+// and also properly handles detection when using "FullAnalogSurface" inputs.
+// Multiple detections are returned until the various timeouts have been reached.
+auto DeviceContainer::DetectInput(const std::vector<std::string>& device_strings,
+                                  std::chrono::milliseconds initial_wait,
+                                  std::chrono::milliseconds confirmation_wait,
+                                  std::chrono::milliseconds maximum_wait) const
+    -> std::vector<InputDetection>
+{
+  struct InputState
+  {
+    InputState(ciface::Core::Device::Input* input_) : input{input_} { stats.Push(0.0); }
+
+    ciface::Core::Device::Input* input;
+    ControlState initial_state = input->GetState();
+    ControlState last_state = initial_state;
+    MathUtil::RunningVariance<ControlState> stats;
+
+    // Prevent multiiple detections until after release.
+    bool is_ready = true;
+
+    void Update()
+    {
+      const auto new_state = input->GetState();
+
+      if (!is_ready && new_state < (1 - INPUT_DETECT_THRESHOLD))
+      {
+        last_state = new_state;
+        is_ready = true;
+        stats.Clear();
+      }
+
+      const auto difference = new_state - last_state;
+      stats.Push(difference);
+      last_state = new_state;
+    }
+
+    bool IsPressed()
+    {
+      if (!is_ready)
+        return false;
+
+      // We want an input that was initially 0.0 and currently 1.0.
+      const auto detection_score = (last_state - std::abs(initial_state));
+      return detection_score > INPUT_DETECT_THRESHOLD;
+    }
+  };
+
+  struct DeviceState
+  {
+    std::shared_ptr<Device> device;
+
+    std::vector<InputState> input_states;
+  };
+
+  // Acquire devices and initial input states.
+  std::vector<DeviceState> device_states;
+  for (const auto& device_string : device_strings)
+  {
+    DeviceQualifier dq;
+    dq.FromString(device_string);
+    auto device = FindDevice(dq);
+
+    if (!device)
+      continue;
+
+    std::vector<InputState> input_states;
+
+    for (auto* input : device->Inputs())
+    {
+      // Don't detect things like absolute cursor positions, accelerometers, or gyroscopes.
+      if (!input->IsDetectable())
+        continue;
+
+      // Undesirable axes will have negative values here when trying to map a
+      // "FullAnalogSurface".
+      input_states.push_back(InputState{input});
+    }
+
+    if (!input_states.empty())
+      device_states.emplace_back(DeviceState{std::move(device), std::move(input_states)});
+  }
+
+  if (device_states.empty())
+    return {};
+
+  std::vector<InputDetection> detections;
+
+  const auto start_time = Clock::now();
+  while (true)
+  {
+    const auto now = Clock::now();
+    const auto elapsed_time = now - start_time;
+
+    if (elapsed_time >= maximum_wait || (detections.empty() && elapsed_time >= initial_wait) ||
+        (!detections.empty() && detections.back().release_time.has_value() &&
+         now >= *detections.back().release_time + confirmation_wait))
+    {
+      break;
+    }
+
+    Common::SleepCurrentThread(10);
+
+    for (auto& device_state : device_states)
+    {
+      for (std::size_t i = 0; i != device_state.input_states.size(); ++i)
+      {
+        auto& input_state = device_state.input_states[i];
+        input_state.Update();
+
+        if (input_state.IsPressed())
+        {
+          input_state.is_ready = false;
+
+          // Digital presses will evaluate as 1 here.
+          // Analog presses will evaluate greater than 1.
+          const auto smoothness =
+              1 / std::sqrt(input_state.stats.Variance() / input_state.stats.Mean());
+
+          InputDetection new_detection;
+          new_detection.device = device_state.device;
+          new_detection.input = input_state.input;
+          new_detection.press_time = Clock::now();
+          new_detection.smoothness = smoothness;
+
+          // We found an input. Add it to our detections.
+          detections.emplace_back(std::move(new_detection));
+        }
+      }
+    }
+
+    // Check for any releases of our detected inputs.
+    for (auto& d : detections)
+    {
+      if (!d.release_time.has_value() && d.input->GetState() < (1 - INPUT_DETECT_THRESHOLD))
+        d.release_time = Clock::now();
+    }
+  }
+
+  return detections;
+}
+}  // namespace ciface::Core