am: activate button poller

src/core/CMakeLists.txt

@@ -405,6 +405,8 @@ add_library(core STATIC
     hle/service/am/applet_data_broker.cpp
     hle/service/am/applet_data_broker.h
     hle/service/am/applet_manager.h
+    hle/service/am/button_poller.cpp
+    hle/service/am/button_poller.h
     hle/service/am/display_layer_manager.cpp
     hle/service/am/display_layer_manager.h
     hle/service/am/frontend/applet_cabinet.cpp

src/core/hle/service/am/am.cpp

@@ -2,6 +2,7 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "core/hle/service/am/am.h"
+#include "core/hle/service/am/button_poller.h"
 #include "core/hle/service/am/service/all_system_applet_proxies_service.h"
 #include "core/hle/service/am/service/application_proxy_service.h"
 #include "core/hle/service/server_manager.h"
@@ -9,6 +10,8 @@
 namespace Service::AM {
 
 void LoopProcess(Core::System& system) {
+    ButtonPoller button_poller(system);
+
     auto server_manager = std::make_unique<ServerManager>(system);
 
     server_manager->RegisterNamedService("appletAE",

src/core/hle/service/am/button_poller.cpp

@@ -0,0 +1,94 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "core/core.h"
+#include "core/hle/service/am/button_poller.h"
+#include "hid_core/frontend/emulated_controller.h"
+#include "hid_core/hid_core.h"
+#include "hid_core/hid_types.h"
+
+namespace Service::AM {
+
+namespace {
+
+enum class ButtonPressDuration {
+    ShortPressing,
+    MiddlePressing,
+    LongPressing,
+};
+
+[[maybe_unused]] ButtonPressDuration ClassifyPressDuration(
+    std::chrono::steady_clock::time_point start) {
+    using namespace std::chrono_literals;
+
+    const auto dur = std::chrono::steady_clock::now() - start;
+
+    // TODO: determine actual thresholds
+    // TODO: these are likely different for each button
+    if (dur < 500ms) {
+        return ButtonPressDuration::ShortPressing;
+    } else if (dur < 1000ms) {
+        return ButtonPressDuration::MiddlePressing;
+    } else {
+        return ButtonPressDuration::LongPressing;
+    }
+}
+
+} // namespace
+
+ButtonPoller::ButtonPoller(Core::System& system) {
+    // TODO: am reads this from the home button state in hid, which is controller-agnostic.
+    Core::HID::ControllerUpdateCallback engine_callback{
+        .on_change =
+            [this](Core::HID::ControllerTriggerType type) {
+                if (type == Core::HID::ControllerTriggerType::Button) {
+                    this->OnButtonStateChanged();
+                }
+            },
+        .is_npad_service = true,
+    };
+
+    m_handheld = system.HIDCore().GetEmulatedController(Core::HID::NpadIdType::Handheld);
+    m_handheld_key = m_handheld->SetCallback(engine_callback);
+    m_player1 = system.HIDCore().GetEmulatedController(Core::HID::NpadIdType::Player1);
+    m_player1_key = m_player1->SetCallback(engine_callback);
+}
+
+ButtonPoller::~ButtonPoller() {
+    m_handheld->DeleteCallback(m_handheld_key);
+    m_player1->DeleteCallback(m_player1_key);
+}
+
+void ButtonPoller::OnButtonStateChanged() {
+    const bool home_button =
+        m_handheld->GetHomeButtons().home.Value() || m_player1->GetHomeButtons().home.Value();
+    const bool capture_button = m_handheld->GetCaptureButtons().capture.Value() ||
+                                m_player1->GetCaptureButtons().capture.Value();
+
+    // Buttons pressed which were not previously pressed
+    if (home_button && !m_home_button_press_start) {
+        m_home_button_press_start = std::chrono::steady_clock::now();
+    }
+    if (capture_button && !m_capture_button_press_start) {
+        m_capture_button_press_start = std::chrono::steady_clock::now();
+    }
+    // if (power_button && !m_power_button_press_start) {
+    //     m_power_button_press_start = std::chrono::steady_clock::now();
+    // }
+
+    // Buttons released which were previously held
+    if (!home_button && m_home_button_press_start) {
+        // TODO
+        m_home_button_press_start = std::nullopt;
+    }
+    if (!capture_button && m_capture_button_press_start) {
+        // TODO
+        m_capture_button_press_start = std::nullopt;
+    }
+    // if (!power_button && m_power_button_press_start) {
+    //     // TODO
+    //     m_power_button_press_start = std::nullopt;
+    // }
+}
+
+} // namespace Service::AM

src/core/hle/service/am/button_poller.h

@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: Copyright 2024 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+#include <chrono>
+#include <optional>
+#include "hid_core/frontend/emulated_controller.h"
+
+namespace Core {
+namespace HID {
+class EmulatedController;
+}
+
+class System;
+} // namespace Core
+
+namespace Service::AM {
+
+class ButtonPoller {
+public:
+    explicit ButtonPoller(Core::System& system);
+    ~ButtonPoller();
+
+private:
+    void OnButtonStateChanged();
+
+private:
+    Core::HID::EmulatedController* m_handheld{};
+    int m_handheld_key{};
+    Core::HID::EmulatedController* m_player1{};
+    int m_player1_key{};
+
+    std::optional<std::chrono::steady_clock::time_point> m_home_button_press_start{};
+    std::optional<std::chrono::steady_clock::time_point> m_capture_button_press_start{};
+    std::optional<std::chrono::steady_clock::time_point> m_power_button_press_start{};
+};
+
+} // namespace Service::AM