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// Copyright 2018 yuzu emulator team
// Licensed under GPLv2 or any later version
// Refer to the license.txt file included.
#include <cstring>
#include "common/common_types.h"
#include "core/core_timing.h"
#include "core/frontend/emu_window.h"
#include "core/hle/service/hid/controllers/gesture.h"
#include "core/settings.h"
namespace Service::HID {
constexpr std::size_t SHARED_MEMORY_OFFSET = 0x3BA00;
constexpr f32 angle_threshold = 0.08f;
constexpr f32 pinch_threshold = 100.0f;
Controller_Gesture::Controller_Gesture(Core::System& system) : ControllerBase(system) {}
Controller_Gesture::~Controller_Gesture() = default;
void Controller_Gesture::OnInit() {
for (std::size_t id = 0; id < MAX_FINGERS; ++id) {
mouse_finger_id[id] = MAX_FINGERS;
keyboard_finger_id[id] = MAX_FINGERS;
udp_finger_id[id] = MAX_FINGERS;
}
}
void Controller_Gesture::OnRelease() {}
void Controller_Gesture::OnUpdate(const Core::Timing::CoreTiming& core_timing, u8* data,
std::size_t size) {
shared_memory.header.timestamp = core_timing.GetCPUTicks();
shared_memory.header.total_entry_count = 17;
if (!IsControllerActivated()) {
shared_memory.header.entry_count = 0;
shared_memory.header.last_entry_index = 0;
return;
}
shared_memory.header.entry_count = 16;
const auto& last_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
shared_memory.header.last_entry_index = (shared_memory.header.last_entry_index + 1) % 17;
auto& cur_entry = shared_memory.gesture_states[shared_memory.header.last_entry_index];
cur_entry.sampling_number = last_entry.sampling_number + 1;
cur_entry.sampling_number2 = cur_entry.sampling_number;
// TODO(german77): Implement all gesture types
const Input::TouchStatus& mouse_status = touch_mouse_device->GetStatus();
const Input::TouchStatus& udp_status = touch_udp_device->GetStatus();
for (std::size_t id = 0; id < mouse_status.size(); ++id) {
mouse_finger_id[id] = UpdateTouchInputEvent(mouse_status[id], mouse_finger_id[id]);
udp_finger_id[id] = UpdateTouchInputEvent(udp_status[id], udp_finger_id[id]);
}
if (Settings::values.use_touch_from_button) {
const Input::TouchStatus& keyboard_status = touch_btn_device->GetStatus();
for (std::size_t id = 0; id < mouse_status.size(); ++id) {
keyboard_finger_id[id] =
UpdateTouchInputEvent(keyboard_status[id], keyboard_finger_id[id]);
}
}
TouchType type = TouchType::Idle;
Attribute attributes{};
GestureProperties gesture = GetGestureProperties();
if (last_gesture.active_points != gesture.active_points) {
++last_gesture.detection_count;
}
if (gesture.active_points > 0) {
if (last_gesture.active_points == 0) {
attributes.is_new_touch.Assign(true);
last_gesture.average_distance = gesture.average_distance;
last_gesture.angle = gesture.angle;
}
type = TouchType::Touch;
if (gesture.mid_point.x != last_entry.x || gesture.mid_point.y != last_entry.y) {
type = TouchType::Pan;
}
if (std::abs(gesture.average_distance - last_gesture.average_distance) > pinch_threshold) {
type = TouchType::Pinch;
}
if (std::abs(gesture.angle - last_gesture.angle) > angle_threshold) {
type = TouchType::Rotate;
}
cur_entry.delta_x = gesture.mid_point.x - last_entry.x;
cur_entry.delta_y = gesture.mid_point.y - last_entry.y;
// TODO: Find how velocities are calculated
cur_entry.vel_x = static_cast<float>(cur_entry.delta_x) * 150.1f;
cur_entry.vel_y = static_cast<float>(cur_entry.delta_y) * 150.1f;
// Slowdown the rate of change for less flapping
last_gesture.average_distance =
(last_gesture.average_distance * 0.9f) + (gesture.average_distance * 0.1f);
last_gesture.angle = (last_gesture.angle * 0.9f) + (gesture.angle * 0.1f);
} else {
cur_entry.delta_x = 0;
cur_entry.delta_y = 0;
cur_entry.vel_x = 0;
cur_entry.vel_y = 0;
}
last_gesture.active_points = gesture.active_points;
cur_entry.detection_count = last_gesture.detection_count;
cur_entry.type = type;
cur_entry.attributes = attributes;
cur_entry.x = gesture.mid_point.x;
cur_entry.y = gesture.mid_point.y;
cur_entry.point_count = static_cast<s32>(gesture.active_points);
for (size_t id = 0; id < MAX_POINTS; id++) {
cur_entry.points[id].x = gesture.points[id].x;
cur_entry.points[id].y = gesture.points[id].y;
}
cur_entry.rotation_angle = 0;
cur_entry.scale = 0;
std::memcpy(data + SHARED_MEMORY_OFFSET, &shared_memory, sizeof(SharedMemory));
}
void Controller_Gesture::OnLoadInputDevices() {
touch_mouse_device = Input::CreateDevice<Input::TouchDevice>("engine:emu_window");
touch_udp_device = Input::CreateDevice<Input::TouchDevice>("engine:cemuhookudp");
touch_btn_device = Input::CreateDevice<Input::TouchDevice>("engine:touch_from_button");
}
std::optional<std::size_t> Controller_Gesture::GetUnusedFingerID() const {
std::size_t first_free_id = 0;
while (first_free_id < MAX_POINTS) {
if (!fingers[first_free_id].pressed) {
return first_free_id;
} else {
first_free_id++;
}
}
return std::nullopt;
}
std::size_t Controller_Gesture::UpdateTouchInputEvent(
const std::tuple<float, float, bool>& touch_input, std::size_t finger_id) {
const auto& [x, y, pressed] = touch_input;
if (pressed) {
if (finger_id == MAX_POINTS) {
const auto first_free_id = GetUnusedFingerID();
if (!first_free_id) {
// Invalid finger id do nothing
return MAX_POINTS;
}
finger_id = first_free_id.value();
fingers[finger_id].pressed = true;
}
fingers[finger_id].x = x;
fingers[finger_id].y = y;
return finger_id;
}
if (finger_id != MAX_POINTS) {
fingers[finger_id].pressed = false;
}
return MAX_POINTS;
}
Controller_Gesture::GestureProperties Controller_Gesture::GetGestureProperties() {
GestureProperties gesture;
std::array<Finger, MAX_POINTS> active_fingers;
const auto end_iter = std::copy_if(fingers.begin(), fingers.end(), active_fingers.begin(),
[](const auto& finger) { return finger.pressed; });
gesture.active_points =
static_cast<std::size_t>(std::distance(active_fingers.begin(), end_iter));
for (size_t id = 0; id < gesture.active_points; ++id) {
gesture.points[id].x =
static_cast<int>(active_fingers[id].x * Layout::ScreenUndocked::Width);
gesture.points[id].y =
static_cast<int>(active_fingers[id].y * Layout::ScreenUndocked::Height);
gesture.mid_point.x += static_cast<int>(gesture.points[id].x / gesture.active_points);
gesture.mid_point.y += static_cast<int>(gesture.points[id].y / gesture.active_points);
}
for (size_t id = 0; id < gesture.active_points; ++id) {
const double distance =
std::pow(static_cast<float>(gesture.mid_point.x - gesture.points[id].x), 2) +
std::pow(static_cast<float>(gesture.mid_point.y - gesture.points[id].y), 2);
gesture.average_distance +=
static_cast<float>(distance) / static_cast<float>(gesture.active_points);
}
gesture.angle = std::atan2(static_cast<float>(gesture.mid_point.y - gesture.points[0].y),
static_cast<float>(gesture.mid_point.x - gesture.points[0].x));
return gesture;
}
} // namespace Service::HID
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