// Copyright 2018 Citra Emulator Project
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <algorithm>
#include <array>
#include <chrono>
#include <cstring>
#include <functional>
#include <thread>
#include <boost/asio.hpp>
#include <boost/bind.hpp>
#include "common/logging/log.h"
#include "input_common/udp/client.h"
#include "input_common/udp/protocol.h"
using boost::asio::ip::udp;
namespace InputCommon::CemuhookUDP {
struct SocketCallback {
std::function<void(Response::Version)> version;
std::function<void(Response::PortInfo)> port_info;
std::function<void(Response::PadData)> pad_data;
};
class Socket {
public:
using clock = std::chrono::system_clock;
explicit Socket(const std::string& host, u16 port, u8 pad_index, u32 client_id,
SocketCallback callback)
: callback(std::move(callback)), timer(io_service),
socket(io_service, udp::endpoint(udp::v4(), 0)), client_id(client_id),
pad_index(pad_index) {
boost::system::error_code ec{};
auto ipv4 = boost::asio::ip::make_address_v4(host, ec);
if (ec.value() != boost::system::errc::success) {
LOG_ERROR(Input, "Invalid IPv4 address \"{}\" provided to socket", host);
ipv4 = boost::asio::ip::address_v4{};
}
send_endpoint = {udp::endpoint(ipv4, port)};
}
void Stop() {
io_service.stop();
}
void Loop() {
io_service.run();
}
void StartSend(const clock::time_point& from) {
timer.expires_at(from + std::chrono::seconds(3));
timer.async_wait([this](const boost::system::error_code& error) { HandleSend(error); });
}
void StartReceive() {
socket.async_receive_from(
boost::asio::buffer(receive_buffer), receive_endpoint,
[this](const boost::system::error_code& error, std::size_t bytes_transferred) {
HandleReceive(error, bytes_transferred);
});
}
private:
void HandleReceive(const boost::system::error_code& error, std::size_t bytes_transferred) {
if (auto type = Response::Validate(receive_buffer.data(), bytes_transferred)) {
switch (*type) {
case Type::Version: {
Response::Version version;
std::memcpy(&version, &receive_buffer[sizeof(Header)], sizeof(Response::Version));
callback.version(std::move(version));
break;
}
case Type::PortInfo: {
Response::PortInfo port_info;
std::memcpy(&port_info, &receive_buffer[sizeof(Header)],
sizeof(Response::PortInfo));
callback.port_info(std::move(port_info));
break;
}
case Type::PadData: {
Response::PadData pad_data;
std::memcpy(&pad_data, &receive_buffer[sizeof(Header)], sizeof(Response::PadData));
callback.pad_data(std::move(pad_data));
break;
}
}
}
StartReceive();
}
void HandleSend(const boost::system::error_code& error) {
boost::system::error_code _ignored{};
// Send a request for getting port info for the pad
Request::PortInfo port_info{1, {pad_index, 0, 0, 0}};
const auto port_message = Request::Create(port_info, client_id);
std::memcpy(&send_buffer1, &port_message, PORT_INFO_SIZE);
socket.send_to(boost::asio::buffer(send_buffer1), send_endpoint, {}, _ignored);
// Send a request for getting pad data for the pad
Request::PadData pad_data{Request::PadData::Flags::Id, pad_index, EMPTY_MAC_ADDRESS};
const auto pad_message = Request::Create(pad_data, client_id);
std::memcpy(send_buffer2.data(), &pad_message, PAD_DATA_SIZE);
socket.send_to(boost::asio::buffer(send_buffer2), send_endpoint, {}, _ignored);
StartSend(timer.expiry());
}
SocketCallback callback;
boost::asio::io_service io_service;
boost::asio::basic_waitable_timer<clock> timer;
udp::socket socket;
u32 client_id{};
u8 pad_index{};
static constexpr std::size_t PORT_INFO_SIZE = sizeof(Message<Request::PortInfo>);
static constexpr std::size_t PAD_DATA_SIZE = sizeof(Message<Request::PadData>);
std::array<u8, PORT_INFO_SIZE> send_buffer1;
std::array<u8, PAD_DATA_SIZE> send_buffer2;
udp::endpoint send_endpoint;
std::array<u8, MAX_PACKET_SIZE> receive_buffer;
udp::endpoint receive_endpoint;
};
static void SocketLoop(Socket* socket) {
socket->StartReceive();
socket->StartSend(Socket::clock::now());
socket->Loop();
}
Client::Client(std::shared_ptr<DeviceStatus> status, const std::string& host, u16 port,
u8 pad_index, u32 client_id)
: status(std::move(status)) {
StartCommunication(host, port, pad_index, client_id);
}
Client::~Client() {
socket->Stop();
thread.join();
}
void Client::ReloadSocket(const std::string& host, u16 port, u8 pad_index, u32 client_id) {
socket->Stop();
thread.join();
StartCommunication(host, port, pad_index, client_id);
}
void Client::OnVersion(Response::Version data) {
LOG_TRACE(Input, "Version packet received: {}", data.version);
}
void Client::OnPortInfo(Response::PortInfo data) {
LOG_TRACE(Input, "PortInfo packet received: {}", data.model);
}
void Client::OnPadData(Response::PadData data) {
LOG_TRACE(Input, "PadData packet received");
if (data.packet_counter <= packet_sequence) {
LOG_WARNING(
Input,
"PadData packet dropped because its stale info. Current count: {} Packet count: {}",
packet_sequence, data.packet_counter);
return;
}
packet_sequence = data.packet_counter;
// TODO: Check how the Switch handles motions and how the CemuhookUDP motion
// directions correspond to the ones of the Switch
Common::Vec3f accel = Common::MakeVec<float>(data.accel.x, data.accel.y, data.accel.z);
Common::Vec3f gyro = Common::MakeVec<float>(data.gyro.pitch, data.gyro.yaw, data.gyro.roll);
{
std::lock_guard guard(status->update_mutex);
status->motion_status = {accel, gyro};
// TODO: add a setting for "click" touch. Click touch refers to a device that differentiates
// between a simple "tap" and a hard press that causes the touch screen to click.
const bool is_active = data.touch_1.is_active != 0;
float x = 0;
float y = 0;
if (is_active && status->touch_calibration) {
const u16 min_x = status->touch_calibration->min_x;
const u16 max_x = status->touch_calibration->max_x;
const u16 min_y = status->touch_calibration->min_y;
const u16 max_y = status->touch_calibration->max_y;
x = (std::clamp(static_cast<u16>(data.touch_1.x), min_x, max_x) - min_x) /
static_cast<float>(max_x - min_x);
y = (std::clamp(static_cast<u16>(data.touch_1.y), min_y, max_y) - min_y) /
static_cast<float>(max_y - min_y);
}
status->touch_status = {x, y, is_active};
}
}
void Client::StartCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id) {
SocketCallback callback{[this](Response::Version version) { OnVersion(version); },
[this](Response::PortInfo info) { OnPortInfo(info); },
[this](Response::PadData data) { OnPadData(data); }};
LOG_INFO(Input, "Starting communication with UDP input server on {}:{}", host, port);
socket = std::make_unique<Socket>(host, port, pad_index, client_id, callback);
thread = std::thread{SocketLoop, this->socket.get()};
}
void TestCommunication(const std::string& host, u16 port, u8 pad_index, u32 client_id,
std::function<void()> success_callback,
std::function<void()> failure_callback) {
std::thread([=] {
Common::Event success_event;
SocketCallback callback{[](Response::Version version) {}, [](Response::PortInfo info) {},
[&](Response::PadData data) { success_event.Set(); }};
Socket socket{host, port, pad_index, client_id, std::move(callback)};
std::thread worker_thread{SocketLoop, &socket};
bool result = success_event.WaitFor(std::chrono::seconds(8));
socket.Stop();
worker_thread.join();
if (result) {
success_callback();
} else {
failure_callback();
}
}).detach();
}
CalibrationConfigurationJob::CalibrationConfigurationJob(
const std::string& host, u16 port, u8 pad_index, u32 client_id,
std::function<void(Status)> status_callback,
std::function<void(u16, u16, u16, u16)> data_callback) {
std::thread([=] {
constexpr u16 CALIBRATION_THRESHOLD = 100;
u16 min_x{UINT16_MAX};
u16 min_y{UINT16_MAX};
u16 max_x{};
u16 max_y{};
Status current_status{Status::Initialized};
SocketCallback callback{[](Response::Version version) {}, [](Response::PortInfo info) {},
[&](Response::PadData data) {
if (current_status == Status::Initialized) {
// Receiving data means the communication is ready now
current_status = Status::Ready;
status_callback(current_status);
}
if (!data.touch_1.is_active) {
return;
}
LOG_DEBUG(Input, "Current touch: {} {}", data.touch_1.x,
data.touch_1.y);
min_x = std::min(min_x, static_cast<u16>(data.touch_1.x));
min_y = std::min(min_y, static_cast<u16>(data.touch_1.y));
if (current_status == Status::Ready) {
// First touch - min data (min_x/min_y)
current_status = Status::Stage1Completed;
status_callback(current_status);
}
if (data.touch_1.x - min_x > CALIBRATION_THRESHOLD &&
data.touch_1.y - min_y > CALIBRATION_THRESHOLD) {
// Set the current position as max value and finishes
// configuration
max_x = data.touch_1.x;
max_y = data.touch_1.y;
current_status = Status::Completed;
data_callback(min_x, min_y, max_x, max_y);
status_callback(current_status);
complete_event.Set();
}
}};
Socket socket{host, port, pad_index, client_id, std::move(callback)};
std::thread worker_thread{SocketLoop, &socket};
complete_event.Wait();
socket.Stop();
worker_thread.join();
}).detach();
}
CalibrationConfigurationJob::~CalibrationConfigurationJob() {
Stop();
}
void CalibrationConfigurationJob::Stop() {
complete_event.Set();
}
} // namespace InputCommon::CemuhookUDP
