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dolphin/Source/Core/InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPClient.cpp

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// Copyright 2019 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPClient.h"
#include <algorithm>
#include <array>
#include <chrono>
#include <tuple>
#include <SFML/Network/SocketSelector.hpp>
#include <SFML/Network/UdpSocket.hpp>
#include <fmt/format.h>
#include "Common/Config/Config.h"
#include "Common/Flag.h"
#include "Common/Logging/Log.h"
#include "Common/MathUtil.h"
#include "Common/Random.h"
#include "Common/ScopeGuard.h"
#include "Common/StringUtil.h"
#include "Common/Thread.h"
#include "Core/CoreTiming.h"
#include "InputCommon/ControllerInterface/ControllerInterface.h"
#include "InputCommon/ControllerInterface/DualShockUDPClient/DualShockUDPProto.h"
namespace ciface::DualShockUDPClient
{
constexpr std::string_view DUALSHOCKUDP_SOURCE_NAME = "DSUClient";
namespace Settings
{
const Config::Info<std::string> SERVER_ADDRESS{
{Config::System::DualShockUDPClient, "Server", "IPAddress"}, ""};
const Config::Info<int> SERVER_PORT{{Config::System::DualShockUDPClient, "Server", "Port"}, 0};
const Config::Info<std::string> SERVERS{{Config::System::DualShockUDPClient, "Server", "Entries"},
""};
const Config::Info<bool> SERVERS_ENABLED{{Config::System::DualShockUDPClient, "Server", "Enabled"},
false};
} // namespace Settings
// Clock type used for querying timeframes
using SteadyClock = std::chrono::steady_clock;
class Device final : public Core::Device
{
private:
template <class T>
class Button final : public Input
{
public:
Button(const char* name, const T& buttons, T mask)
: m_name(name), m_buttons(buttons), m_mask(mask)
{
}
std::string GetName() const override { return m_name; }
ControlState GetState() const override { return (m_buttons & m_mask) != 0; }
private:
const char* const m_name;
const T& m_buttons;
const T m_mask;
};
template <class T>
class AnalogInput : public Input
{
public:
AnalogInput(const char* name, const T& input, ControlState range, ControlState offset = 0)
: m_name(name), m_input(input), m_range(range), m_offset(offset)
{
}
std::string GetName() const final override { return m_name; }
ControlState GetState() const final override
{
return (ControlState(m_input) + m_offset) / m_range;
}
private:
const char* m_name;
const T& m_input;
const ControlState m_range;
const ControlState m_offset;
};
class TouchInput final : public AnalogInput<int>
{
public:
using AnalogInput::AnalogInput;
bool IsDetectable() const override { return false; }
};
class MotionInput final : public AnalogInput<float>
{
public:
using AnalogInput::AnalogInput;
bool IsDetectable() const override { return false; }
};
using AccelerometerInput = MotionInput;
using GyroInput = MotionInput;
class BatteryInput final : public Input
{
public:
using BatteryState = Proto::DsBattery;
BatteryInput(const BatteryState& battery) : m_battery(battery) {}
std::string GetName() const override { return "Battery"; }
ControlState GetState() const override
{
switch (m_battery)
{
case BatteryState::Charging: // We don't actually know the battery level in this case
case BatteryState::Charged:
return BATTERY_INPUT_MAX_VALUE;
default:
return ControlState(m_battery) / ControlState(BatteryState::Full) * BATTERY_INPUT_MAX_VALUE;
}
}
bool IsDetectable() const override { return false; }
private:
const BatteryState& m_battery;
};
public:
Core::DeviceRemoval UpdateInput() override;
Device(std::string name, int index, std::string server_address, u16 server_port, u32 client_uid);
std::string GetName() const final override;
std::string GetSource() const final override;
std::optional<int> GetPreferredId() const final override;
// Always add these at the end, given their hotplug nature
int GetSortPriority() const override { return -5; }
private:
void ResetPadData();
const std::string m_name;
const int m_index;
sf::UdpSocket m_socket;
SteadyClock::time_point m_next_reregister = SteadyClock::time_point::min();
Proto::MessageType::PadDataResponse m_pad_data{};
Proto::Touch m_prev_touch{};
bool m_prev_touch_valid = false;
int m_touch_x = 0;
int m_touch_y = 0;
const std::string m_server_address;
const u16 m_server_port;
s16 m_touch_x_min = 0;
s16 m_touch_y_min = 0;
s16 m_touch_x_max = 0;
s16 m_touch_y_max = 0;
const u32 m_client_uid;
};
using MathUtil::GRAVITY_ACCELERATION;
constexpr auto SERVER_REREGISTER_INTERVAL = std::chrono::seconds{1};
constexpr auto SERVER_LISTPORTS_INTERVAL = std::chrono::seconds{1};
constexpr int TOUCH_X_AXIS_MAX = 1000;
constexpr int TOUCH_Y_AXIS_MAX = 500;
constexpr auto THREAD_MAX_WAIT_INTERVAL = std::chrono::milliseconds{250};
constexpr auto SERVER_UNRESPONSIVE_INTERVAL = std::chrono::seconds{1}; // Can be 0
constexpr u32 SERVER_ASKED_PADS = 4;
struct Server
{
Server(std::string description, std::string address, u16 port)
: m_description{std::move(description)}, m_address{std::move(address)}, m_port{port}
{
}
Server(const Server&) = delete;
Server(Server&& other) noexcept
{
m_description = std::move(other.m_description);
m_address = std::move(other.m_address);
m_port = other.m_port;
m_port_info = std::move(other.m_port_info);
}
Server& operator=(const Server&) = delete;
Server& operator=(Server&&) = delete;
~Server() = default;
std::string m_description;
std::string m_address;
u16 m_port = 0;
std::array<Proto::MessageType::PortInfo, Proto::PORT_COUNT> m_port_info{};
sf::UdpSocket m_socket;
SteadyClock::time_point m_disconnect_time = SteadyClock::now();
};
class InputBackend final : public ciface::InputBackend
{
public:
InputBackend(ControllerInterface* controller_interface);
~InputBackend();
void PopulateDevices() override;
private:
void ConfigChanged();
void Restart();
void HotplugThreadFunc();
void StartHotplugThread();
void StopHotplugThread();
bool m_servers_enabled = false;
std::vector<Server> m_servers;
u32 m_client_uid = 0;
SteadyClock::time_point m_next_listports_time;
std::thread m_hotplug_thread;
Common::Flag m_hotplug_thread_running;
Config::ConfigChangedCallbackID m_config_change_callback_id;
};
std::unique_ptr<ciface::InputBackend> CreateInputBackend(ControllerInterface* controller_interface)
{
return std::make_unique<InputBackend>(controller_interface);
}
static bool IsSameController(const Proto::MessageType::PortInfo& a,
const Proto::MessageType::PortInfo& b)
{
// compare everything but battery_status
return std::tie(a.pad_id, a.pad_state, a.model, a.connection_type, a.pad_mac_address) ==
std::tie(b.pad_id, b.pad_state, b.model, b.connection_type, b.pad_mac_address);
}
void InputBackend::HotplugThreadFunc()
{
Common::SetCurrentThreadName("DualShockUDPClient Hotplug Thread");
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient hotplug thread started");
Common::ScopeGuard thread_stop_guard{
[] { INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient hotplug thread stopped"); }};
std::vector<bool> timed_out_servers(m_servers.size(), false);
while (m_hotplug_thread_running.IsSet())
{
using namespace std::chrono;
using namespace std::chrono_literals;
const auto now = SteadyClock::now();
if (now >= m_next_listports_time)
{
m_next_listports_time = now + SERVER_LISTPORTS_INTERVAL;
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = m_servers[i];
Proto::Message<Proto::MessageType::ListPorts> msg(m_client_uid);
auto& list_ports = msg.m_message;
// We ask for x possible devices. We will receive a message for every connected device.
list_ports.pad_request_count = SERVER_ASKED_PADS;
list_ports.pad_ids = {0, 1, 2, 3};
msg.Finish();
if (server.m_socket.send(&list_ports, sizeof list_ports, server.m_address, server.m_port) !=
sf::Socket::Status::Done)
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient HotplugThreadFunc send failed");
}
timed_out_servers[i] = true;
}
}
sf::SocketSelector selector;
for (auto& server : m_servers)
{
selector.add(server.m_socket);
}
auto timeout = duration_cast<milliseconds>(m_next_listports_time - SteadyClock::now());
// Receive controller port info within a time from our request.
// Run this even if we sent no new requests, to disconnect devices,
// sleep (wait) the thread and catch old responses.
do
{
// Selector's wait treats a timeout of zero as infinite timeout, which we don't want,
// but we also don't want risk waiting for the whole SERVER_LISTPORTS_INTERVAL and hang
// the thead trying to close this one in case we received no answers.
const auto current_timeout = std::max(std::min(timeout, THREAD_MAX_WAIT_INTERVAL), 1ms);
timeout -= current_timeout;
// This will return at the first answer
if (selector.wait(sf::milliseconds(current_timeout.count())))
{
// Now check all the servers because we don't know which one(s) sent a reply
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = m_servers[i];
if (!selector.isReady(server.m_socket))
{
continue;
}
Proto::Message<Proto::MessageType::FromServer> msg;
std::size_t received_bytes;
sf::IpAddress sender;
u16 port;
if (server.m_socket.receive(&msg, sizeof(msg), received_bytes, sender, port) !=
sf::Socket::Status::Done)
{
continue;
}
if (auto port_info = msg.CheckAndCastTo<Proto::MessageType::PortInfo>())
{
server.m_disconnect_time = SteadyClock::now() + SERVER_UNRESPONSIVE_INTERVAL;
// We have receive at least one valid update, that's enough. This is needed to avoid
// false positive when checking for disconnection in case our thread waited too long
timed_out_servers[i] = false;
const bool port_changed =
!IsSameController(*port_info, server.m_port_info[port_info->pad_id]);
if (port_changed)
{
server.m_port_info[port_info->pad_id] = *port_info;
// Just remove and re-add all the devices for simplicity
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });
}
}
}
}
if (!m_hotplug_thread_running.IsSet()) // Avoid hanging the thread for too long
return;
} while (timeout > 0ms);
// If we have failed to receive any information from the server (or even send it),
// disconnect all devices from it (after enough time has elapsed, to avoid false positives).
for (size_t i = 0; i < m_servers.size(); ++i)
{
auto& server = m_servers[i];
if (timed_out_servers[i] && SteadyClock::now() >= server.m_disconnect_time)
{
bool any_connected = false;
for (size_t port_index = 0; port_index < server.m_port_info.size(); port_index++)
{
any_connected = any_connected ||
server.m_port_info[port_index].pad_state == Proto::DsState::Connected;
server.m_port_info[port_index] = {};
server.m_port_info[port_index].pad_id = static_cast<u8>(port_index);
}
// We can't only remove devices added by this server as we wouldn't know which they are
if (any_connected)
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });
}
}
}
}
void InputBackend::StartHotplugThread()
{
// Mark the thread as running.
if (!m_hotplug_thread_running.TestAndSet())
{
// It was already running.
return;
}
m_hotplug_thread = std::thread(&InputBackend::HotplugThreadFunc, this);
}
void InputBackend::StopHotplugThread()
{
// Tell the hotplug thread to stop.
if (!m_hotplug_thread_running.TestAndClear())
{
// It wasn't running, we're done.
return;
}
m_hotplug_thread.join();
for (auto& server : m_servers)
{
server.m_socket.unbind(); // interrupt blocking socket
}
}
// Also just start
void InputBackend::Restart()
{
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient Restart");
StopHotplugThread();
for (auto& server : m_servers)
{
for (size_t port_index = 0; port_index < server.m_port_info.size(); port_index++)
{
server.m_port_info[port_index] = {};
server.m_port_info[port_index].pad_id = static_cast<u8>(port_index);
}
}
// Only removes devices as servers have been cleaned
GetControllerInterface().PlatformPopulateDevices([this] { PopulateDevices(); });
m_client_uid = Common::Random::GenerateValue<u32>();
m_next_listports_time = SteadyClock::now();
if (m_servers_enabled && !m_servers.empty())
StartHotplugThread();
}
void InputBackend::ConfigChanged()
{
const bool servers_enabled = Config::Get(Settings::SERVERS_ENABLED);
const std::string servers_setting = Config::Get(Settings::SERVERS);
std::string new_servers_setting;
for (const auto& server : m_servers)
{
new_servers_setting +=
fmt::format("{}:{}:{};", server.m_description, server.m_address, server.m_port);
}
if (servers_enabled != m_servers_enabled || servers_setting != new_servers_setting)
{
// Stop the thread before writing to m_servers
StopHotplugThread();
m_servers_enabled = servers_enabled;
m_servers.clear();
const auto server_details = SplitString(servers_setting, ';');
for (const auto& server_detail : server_details)
{
const auto server_info = SplitString(server_detail, ':');
if (server_info.size() < 3)
continue;
const std::string description = server_info[0];
const std::string server_address = server_info[1];
const auto port = std::stoi(server_info[2]);
if (port >= std::numeric_limits<u16>::max())
{
continue;
}
u16 server_port = static_cast<u16>(port);
m_servers.emplace_back(description, server_address, server_port);
}
Restart();
}
}
InputBackend::InputBackend(ControllerInterface* controller_interface)
: ciface::InputBackend(controller_interface)
{
// The following is added for backwards compatibility
const auto server_address_setting = Config::Get(Settings::SERVER_ADDRESS);
const auto server_port_setting = Config::Get(Settings::SERVER_PORT);
if (!server_address_setting.empty() && server_port_setting != 0)
{
const auto& servers_setting = Config::Get(ciface::DualShockUDPClient::Settings::SERVERS);
Config::SetBaseOrCurrent(ciface::DualShockUDPClient::Settings::SERVERS,
servers_setting + fmt::format("{}:{}:{};", "DS4",
server_address_setting,
server_port_setting));
Config::SetBase(Settings::SERVER_ADDRESS, "");
Config::SetBase(Settings::SERVER_PORT, 0);
}
m_config_change_callback_id =
Config::AddConfigChangedCallback(std::bind(&InputBackend::ConfigChanged, this));
// Call it immediately to load settings
ConfigChanged();
}
// This can be called by the host thread as well as the hotplug thread, concurrently.
// So use PlatformPopulateDevices().
// m_servers is already safe because it can only be modified when the DSU thread is not running,
// from the main thread
void InputBackend::PopulateDevices()
{
INFO_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient PopulateDevices");
// m_servers has already been updated so we can't use it to know which devices we removed,
// also it's good to remove all of them before adding new ones so that their id will be set
// correctly if they have the same name
GetControllerInterface().RemoveDevice(
[](const auto* dev) { return dev->GetSource() == DUALSHOCKUDP_SOURCE_NAME; });
// Users might have created more than one server on the same IP/Port.
// Devices might end up being duplicated (if the server responds two all requests)
// but they won't conflict.
for (const auto& server : m_servers)
{
for (size_t port_index = 0; port_index < server.m_port_info.size(); port_index++)
{
const Proto::MessageType::PortInfo& port_info = server.m_port_info[port_index];
if (port_info.pad_state != Proto::DsState::Connected)
continue;
GetControllerInterface().AddDevice(
std::make_shared<Device>(server.m_description, static_cast<int>(port_index),
server.m_address, server.m_port, m_client_uid));
}
}
}
InputBackend::~InputBackend()
{
Config::RemoveConfigChangedCallback(m_config_change_callback_id);
StopHotplugThread();
}
Device::Device(std::string name, int index, std::string server_address, u16 server_port,
u32 client_uid)
: m_name{std::move(name)}, m_index{index}, m_server_address{std::move(server_address)},
m_server_port{server_port}, m_client_uid(client_uid)
{
m_socket.setBlocking(false);
AddInput(new AnalogInput<u8>("Pad W", m_pad_data.button_dpad_left_analog, 255));
AddInput(new AnalogInput<u8>("Pad S", m_pad_data.button_dpad_down_analog, 255));
AddInput(new AnalogInput<u8>("Pad E", m_pad_data.button_dpad_right_analog, 255));
AddInput(new AnalogInput<u8>("Pad N", m_pad_data.button_dpad_up_analog, 255));
AddInput(new AnalogInput<u8>("Square", m_pad_data.button_square_analog, 255));
AddInput(new AnalogInput<u8>("Cross", m_pad_data.button_cross_analog, 255));
AddInput(new AnalogInput<u8>("Circle", m_pad_data.button_circle_analog, 255));
AddInput(new AnalogInput<u8>("Triangle", m_pad_data.button_triangle_analog, 255));
AddInput(new AnalogInput<u8>("L1", m_pad_data.button_l1_analog, 255));
AddInput(new AnalogInput<u8>("R1", m_pad_data.button_r1_analog, 255));
AddInput(new AnalogInput<u8>("L2", m_pad_data.trigger_l2, 255));
AddInput(new AnalogInput<u8>("R2", m_pad_data.trigger_r2, 255));
AddInput(new Button<u8>("L3", m_pad_data.button_states1, 0x2));
AddInput(new Button<u8>("R3", m_pad_data.button_states1, 0x4));
AddInput(new Button<u8>("Share", m_pad_data.button_states1, 0x1));
AddInput(new Button<u8>("Options", m_pad_data.button_states1, 0x8));
AddInput(new Button<u8>("PS", m_pad_data.button_ps, 0x1));
AddInput(new Button<u8>("Touch Button", m_pad_data.button_touch, 0x1));
AddInput(new AnalogInput<u8>("Left X-", m_pad_data.left_stick_x, -128, -128));
AddInput(new AnalogInput<u8>("Left X+", m_pad_data.left_stick_x, 127, -128));
AddInput(new AnalogInput<u8>("Left Y-", m_pad_data.left_stick_y_inverted, -128, -128));
AddInput(new AnalogInput<u8>("Left Y+", m_pad_data.left_stick_y_inverted, 127, -128));
AddInput(new AnalogInput<u8>("Right X-", m_pad_data.right_stick_x, -128, -128));
AddInput(new AnalogInput<u8>("Right X+", m_pad_data.right_stick_x, 127, -128));
AddInput(new AnalogInput<u8>("Right Y-", m_pad_data.right_stick_y_inverted, -128, -128));
AddInput(new AnalogInput<u8>("Right Y+", m_pad_data.right_stick_y_inverted, 127, -128));
AddInput(new TouchInput("Touch X-", m_touch_x, -TOUCH_X_AXIS_MAX));
AddInput(new TouchInput("Touch X+", m_touch_x, TOUCH_X_AXIS_MAX));
AddInput(new TouchInput("Touch Y-", m_touch_y, -TOUCH_Y_AXIS_MAX));
AddInput(new TouchInput("Touch Y+", m_touch_y, TOUCH_Y_AXIS_MAX));
// Convert Gs to meters per second squared
constexpr auto accel_scale = 1.0 / GRAVITY_ACCELERATION;
AddInput(new AccelerometerInput("Accel Up", m_pad_data.accelerometer_y_g, -accel_scale));
AddInput(new AccelerometerInput("Accel Down", m_pad_data.accelerometer_y_g, accel_scale));
AddInput(new AccelerometerInput("Accel Left", m_pad_data.accelerometer_x_g, accel_scale));
AddInput(new AccelerometerInput("Accel Right", m_pad_data.accelerometer_x_g, -accel_scale));
AddInput(new AccelerometerInput("Accel Forward", m_pad_data.accelerometer_z_g, accel_scale));
AddInput(new AccelerometerInput("Accel Backward", m_pad_data.accelerometer_z_g, -accel_scale));
// Convert degrees per second to radians per second
constexpr auto gyro_scale = 360.0 / MathUtil::TAU;
AddInput(new GyroInput("Gyro Pitch Up", m_pad_data.gyro_pitch_deg_s, gyro_scale));
AddInput(new GyroInput("Gyro Pitch Down", m_pad_data.gyro_pitch_deg_s, -gyro_scale));
AddInput(new GyroInput("Gyro Roll Left", m_pad_data.gyro_roll_deg_s, -gyro_scale));
AddInput(new GyroInput("Gyro Roll Right", m_pad_data.gyro_roll_deg_s, gyro_scale));
AddInput(new GyroInput("Gyro Yaw Left", m_pad_data.gyro_yaw_deg_s, -gyro_scale));
AddInput(new GyroInput("Gyro Yaw Right", m_pad_data.gyro_yaw_deg_s, gyro_scale));
AddInput(new BatteryInput(m_pad_data.battery_status));
m_touch_x_min = 0;
m_touch_y_min = 0;
// DS4 touchpad max values
m_touch_x_max = 1919;
m_touch_y_max = 941;
ResetPadData();
}
void Device::ResetPadData()
{
m_pad_data = Proto::MessageType::PadDataResponse{};
// Make sure they start from resting values, not from 0
m_touch_x = m_touch_x_min + ((m_touch_x_max - m_touch_x_min) / 2.0);
m_touch_y = m_touch_y_min + ((m_touch_y_max - m_touch_y_min) / 2.0);
m_pad_data.left_stick_x = 128;
m_pad_data.left_stick_y_inverted = 128;
m_pad_data.right_stick_x = 128;
m_pad_data.right_stick_y_inverted = 128;
m_pad_data.touch1.x = m_touch_x;
m_pad_data.touch1.y = m_touch_y;
}
std::string Device::GetName() const
{
return m_name;
}
std::string Device::GetSource() const
{
return std::string(DUALSHOCKUDP_SOURCE_NAME);
}
Core::DeviceRemoval Device::UpdateInput()
{
// Regularly tell the UDP server to feed us controller data
const auto now = SteadyClock::now();
if (now >= m_next_reregister)
{
m_next_reregister = now + SERVER_REREGISTER_INTERVAL;
Proto::Message<Proto::MessageType::PadDataRequest> msg(m_client_uid);
auto& data_req = msg.m_message;
data_req.register_flags = Proto::RegisterFlags::PadID;
data_req.pad_id_to_register = m_index;
msg.Finish();
if (m_socket.send(&data_req, sizeof(data_req), m_server_address, m_server_port) !=
sf::Socket::Status::Done)
{
ERROR_LOG_FMT(CONTROLLERINTERFACE, "DualShockUDPClient UpdateInput send failed");
}
}
// Receive and handle controller data
Proto::Message<Proto::MessageType::FromServer> msg;
std::size_t received_bytes;
sf::IpAddress sender;
u16 port;
while (m_socket.receive(&msg, sizeof msg, received_bytes, sender, port) ==
sf::Socket::Status::Done)
{
if (auto pad_data = msg.CheckAndCastTo<Proto::MessageType::PadDataResponse>())
{
m_pad_data = *pad_data;
// Update touch pad relative coordinates
if (m_pad_data.touch1.id != m_prev_touch.id)
m_prev_touch_valid = false;
if (m_prev_touch_valid)
{
m_touch_x += m_pad_data.touch1.x - m_prev_touch.x;
m_touch_y += m_pad_data.touch1.y - m_prev_touch.y;
m_touch_x = std::clamp(m_touch_x, -TOUCH_X_AXIS_MAX, TOUCH_X_AXIS_MAX);
m_touch_y = std::clamp(m_touch_y, -TOUCH_Y_AXIS_MAX, TOUCH_Y_AXIS_MAX);
}
m_prev_touch = m_pad_data.touch1;
m_prev_touch_valid = true;
}
}
return Core::DeviceRemoval::Keep;
}
std::optional<int> Device::GetPreferredId() const
{
return m_index;
}
} // namespace ciface::DualShockUDPClient
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