7 files changed, 925 insertions, 10 deletions

diff --git a/src/input_common/CMakeLists.txt b/src/input_common/CMakeLists.txt
index c4283a952..dd13d948f 100644
--- a/src/input_common/CMakeLists.txt
+++ b/src/input_common/CMakeLists.txt
@@ -21,6 +21,10 @@ add_library(input_common STATIC
     mouse/mouse_poller.h
     sdl/sdl.cpp
     sdl/sdl.h
+    tas/tas_input.cpp
+    tas/tas_input.h
+    tas/tas_poller.cpp
+    tas/tas_poller.h
     udp/client.cpp
     udp/client.h
     udp/protocol.cpp
diff --git a/src/input_common/main.cpp b/src/input_common/main.cpp
index ff23230f0..f3907c65a 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -5,6 +5,7 @@
 #include <memory>
 #include <thread>
 #include "common/param_package.h"
+#include "common/settings.h"
 #include "input_common/analog_from_button.h"
 #include "input_common/gcadapter/gc_adapter.h"
 #include "input_common/gcadapter/gc_poller.h"
@@ -13,6 +14,8 @@
 #include "input_common/motion_from_button.h"
 #include "input_common/mouse/mouse_input.h"
 #include "input_common/mouse/mouse_poller.h"
+#include "input_common/tas/tas_input.h"
+#include "input_common/tas/tas_poller.h"
 #include "input_common/touch_from_button.h"
 #include "input_common/udp/client.h"
 #include "input_common/udp/udp.h"
@@ -60,6 +63,12 @@ struct InputSubsystem::Impl {
         Input::RegisterFactory<Input::MotionDevice>("mouse", mousemotion);
         mousetouch = std::make_shared<MouseTouchFactory>(mouse);
         Input::RegisterFactory<Input::TouchDevice>("mouse", mousetouch);
+
+        tas = std::make_shared<TasInput::Tas>();
+        tasbuttons = std::make_shared<TasButtonFactory>(tas);
+        Input::RegisterFactory<Input::ButtonDevice>("tas", tasbuttons);
+        tasanalog = std::make_shared<TasAnalogFactory>(tas);
+        Input::RegisterFactory<Input::AnalogDevice>("tas", tasanalog);
     }
 
     void Shutdown() {
@@ -94,6 +103,12 @@ struct InputSubsystem::Impl {
         mouseanalog.reset();
         mousemotion.reset();
         mousetouch.reset();
+
+        Input::UnregisterFactory<Input::ButtonDevice>("tas");
+        Input::UnregisterFactory<Input::AnalogDevice>("tas");
+
+        tasbuttons.reset();
+        tasanalog.reset();
     }
 
     [[nodiscard]] std::vector<Common::ParamPackage> GetInputDevices() const {
@@ -101,6 +116,10 @@ struct InputSubsystem::Impl {
             Common::ParamPackage{{"display", "Any"}, {"class", "any"}},
             Common::ParamPackage{{"display", "Keyboard/Mouse"}, {"class", "keyboard"}},
         };
+        if (Settings::values.tas_enable) {
+            devices.emplace_back(
+                Common::ParamPackage{{"display", "TAS Controller"}, {"class", "tas"}});
+        }
 #ifdef HAVE_SDL2
         auto sdl_devices = sdl->GetInputDevices();
         devices.insert(devices.end(), sdl_devices.begin(), sdl_devices.end());
@@ -120,6 +139,9 @@ struct InputSubsystem::Impl {
         if (params.Get("class", "") == "gcpad") {
             return gcadapter->GetAnalogMappingForDevice(params);
         }
+        if (params.Get("class", "") == "tas") {
+            return tas->GetAnalogMappingForDevice(params);
+        }
 #ifdef HAVE_SDL2
         if (params.Get("class", "") == "sdl") {
             return sdl->GetAnalogMappingForDevice(params);
@@ -136,6 +158,9 @@ struct InputSubsystem::Impl {
         if (params.Get("class", "") == "gcpad") {
             return gcadapter->GetButtonMappingForDevice(params);
         }
+        if (params.Get("class", "") == "tas") {
+            return tas->GetButtonMappingForDevice(params);
+        }
 #ifdef HAVE_SDL2
         if (params.Get("class", "") == "sdl") {
             return sdl->GetButtonMappingForDevice(params);
@@ -174,9 +199,12 @@ struct InputSubsystem::Impl {
     std::shared_ptr<MouseAnalogFactory> mouseanalog;
     std::shared_ptr<MouseMotionFactory> mousemotion;
     std::shared_ptr<MouseTouchFactory> mousetouch;
+    std::shared_ptr<TasButtonFactory> tasbuttons;
+    std::shared_ptr<TasAnalogFactory> tasanalog;
     std::shared_ptr<CemuhookUDP::Client> udp;
     std::shared_ptr<GCAdapter::Adapter> gcadapter;
     std::shared_ptr<MouseInput::Mouse> mouse;
+    std::shared_ptr<TasInput::Tas> tas;
 };
 
 InputSubsystem::InputSubsystem() : impl{std::make_unique<Impl>()} {}
@@ -207,6 +235,14 @@ const MouseInput::Mouse* InputSubsystem::GetMouse() const {
     return impl->mouse.get();
 }
 
+TasInput::Tas* InputSubsystem::GetTas() {
+    return impl->tas.get();
+}
+
+const TasInput::Tas* InputSubsystem::GetTas() const {
+    return impl->tas.get();
+}
+
 std::vector<Common::ParamPackage> InputSubsystem::GetInputDevices() const {
     return impl->GetInputDevices();
 }
@@ -287,6 +323,22 @@ const MouseTouchFactory* InputSubsystem::GetMouseTouch() const {
     return impl->mousetouch.get();
 }
 
+TasButtonFactory* InputSubsystem::GetTasButtons() {
+    return impl->tasbuttons.get();
+}
+
+const TasButtonFactory* InputSubsystem::GetTasButtons() const {
+    return impl->tasbuttons.get();
+}
+
+TasAnalogFactory* InputSubsystem::GetTasAnalogs() {
+    return impl->tasanalog.get();
+}
+
+const TasAnalogFactory* InputSubsystem::GetTasAnalogs() const {
+    return impl->tasanalog.get();
+}
+
 void InputSubsystem::ReloadInputDevices() {
     if (!impl->udp) {
         return;
@@ -294,8 +346,8 @@ void InputSubsystem::ReloadInputDevices() {
     impl->udp->ReloadSockets();
 }
 
-std::vector<std::unique_ptr<Polling::DevicePoller>> InputSubsystem::GetPollers([
-    [maybe_unused]] Polling::DeviceType type) const {
+std::vector<std::unique_ptr<Polling::DevicePoller>> InputSubsystem::GetPollers(
+    [[maybe_unused]] Polling::DeviceType type) const {
 #ifdef HAVE_SDL2
     return impl->sdl->GetPollers(type);
 #else
diff --git a/src/input_common/main.h b/src/input_common/main.h
index 5d6f26385..6390d3f09 100644
--- a/src/input_common/main.h
+++ b/src/input_common/main.h
@@ -29,6 +29,10 @@ namespace MouseInput {
 class Mouse;
 }
 
+namespace TasInput {
+class Tas;
+}
+
 namespace InputCommon {
 namespace Polling {
 
@@ -64,6 +68,8 @@ class MouseButtonFactory;
 class MouseAnalogFactory;
 class MouseMotionFactory;
 class MouseTouchFactory;
+class TasButtonFactory;
+class TasAnalogFactory;
 class Keyboard;
 
 /**
@@ -103,6 +109,11 @@ public:
     /// Retrieves the underlying mouse device.
     [[nodiscard]] const MouseInput::Mouse* GetMouse() const;
 
+    /// Retrieves the underlying tas device.
+    [[nodiscard]] TasInput::Tas* GetTas();
+
+    /// Retrieves the underlying tas device.
+    [[nodiscard]] const TasInput::Tas* GetTas() const;
     /**
      * Returns all available input devices that this Factory can create a new device with.
      * Each returned ParamPackage should have a `display` field used for display, a class field for
@@ -144,30 +155,42 @@ public:
     /// Retrieves the underlying udp touch handler.
     [[nodiscard]] const UDPTouchFactory* GetUDPTouch() const;
 
-    /// Retrieves the underlying GameCube button handler.
+    /// Retrieves the underlying mouse button handler.
     [[nodiscard]] MouseButtonFactory* GetMouseButtons();
 
-    /// Retrieves the underlying GameCube button handler.
+    /// Retrieves the underlying mouse button handler.
     [[nodiscard]] const MouseButtonFactory* GetMouseButtons() const;
 
-    /// Retrieves the underlying udp touch handler.
+    /// Retrieves the underlying mouse analog handler.
     [[nodiscard]] MouseAnalogFactory* GetMouseAnalogs();
 
-    /// Retrieves the underlying udp touch handler.
+    /// Retrieves the underlying mouse analog handler.
     [[nodiscard]] const MouseAnalogFactory* GetMouseAnalogs() const;
 
-    /// Retrieves the underlying udp motion handler.
+    /// Retrieves the underlying mouse motion handler.
     [[nodiscard]] MouseMotionFactory* GetMouseMotions();
 
-    /// Retrieves the underlying udp motion handler.
+    /// Retrieves the underlying mouse motion handler.
     [[nodiscard]] const MouseMotionFactory* GetMouseMotions() const;
 
-    /// Retrieves the underlying udp touch handler.
+    /// Retrieves the underlying mouse touch handler.
     [[nodiscard]] MouseTouchFactory* GetMouseTouch();
 
-    /// Retrieves the underlying udp touch handler.
+    /// Retrieves the underlying mouse touch handler.
     [[nodiscard]] const MouseTouchFactory* GetMouseTouch() const;
 
+    /// Retrieves the underlying tas button handler.
+    [[nodiscard]] TasButtonFactory* GetTasButtons();
+
+    /// Retrieves the underlying tas button handler.
+    [[nodiscard]] const TasButtonFactory* GetTasButtons() const;
+
+    /// Retrieves the underlying tas analogs handler.
+    [[nodiscard]] TasAnalogFactory* GetTasAnalogs();
+
+    /// Retrieves the underlying tas analogs handler.
+    [[nodiscard]] const TasAnalogFactory* GetTasAnalogs() const;
+
     /// Reloads the input devices
     void ReloadInputDevices();
 
diff --git a/src/input_common/tas/tas_input.cpp b/src/input_common/tas/tas_input.cpp
new file mode 100644
index 000000000..1598092b6
--- /dev/null
+++ b/src/input_common/tas/tas_input.cpp
@@ -0,0 +1,455 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <regex>
+
+#include "common/fs/file.h"
+#include "common/fs/fs_types.h"
+#include "common/fs/path_util.h"
+#include "common/logging/log.h"
+#include "common/settings.h"
+#include "input_common/tas/tas_input.h"
+
+namespace TasInput {
+
+// Supported keywords and buttons from a TAS file
+constexpr std::array<std::pair<std::string_view, TasButton>, 20> text_to_tas_button = {
+    std::pair{"KEY_A", TasButton::BUTTON_A},
+    {"KEY_B", TasButton::BUTTON_B},
+    {"KEY_X", TasButton::BUTTON_X},
+    {"KEY_Y", TasButton::BUTTON_Y},
+    {"KEY_LSTICK", TasButton::STICK_L},
+    {"KEY_RSTICK", TasButton::STICK_R},
+    {"KEY_L", TasButton::TRIGGER_L},
+    {"KEY_R", TasButton::TRIGGER_R},
+    {"KEY_PLUS", TasButton::BUTTON_PLUS},
+    {"KEY_MINUS", TasButton::BUTTON_MINUS},
+    {"KEY_DLEFT", TasButton::BUTTON_LEFT},
+    {"KEY_DUP", TasButton::BUTTON_UP},
+    {"KEY_DRIGHT", TasButton::BUTTON_RIGHT},
+    {"KEY_DDOWN", TasButton::BUTTON_DOWN},
+    {"KEY_SL", TasButton::BUTTON_SL},
+    {"KEY_SR", TasButton::BUTTON_SR},
+    {"KEY_CAPTURE", TasButton::BUTTON_CAPTURE},
+    {"KEY_HOME", TasButton::BUTTON_HOME},
+    {"KEY_ZL", TasButton::TRIGGER_ZL},
+    {"KEY_ZR", TasButton::TRIGGER_ZR},
+};
+
+Tas::Tas() {
+    if (!Settings::values.tas_enable) {
+        needs_reset = true;
+        return;
+    }
+    LoadTasFiles();
+}
+
+Tas::~Tas() {
+    Stop();
+};
+
+void Tas::LoadTasFiles() {
+    script_length = 0;
+    for (size_t i = 0; i < commands.size(); i++) {
+        LoadTasFile(i);
+        if (commands[i].size() > script_length) {
+            script_length = commands[i].size();
+        }
+    }
+}
+
+void Tas::LoadTasFile(size_t player_index) {
+    if (!commands[player_index].empty()) {
+        commands[player_index].clear();
+    }
+    std::string file =
+        Common::FS::ReadStringFromFile(Common::FS::GetYuzuPath(Common::FS::YuzuPath::TASDir) /
+                                           fmt::format("script0-{}.txt", player_index + 1),
+                                       Common::FS::FileType::BinaryFile);
+    std::stringstream command_line(file);
+    std::string line;
+    int frame_no = 0;
+    while (std::getline(command_line, line, '\n')) {
+        if (line.empty()) {
+            continue;
+        }
+        LOG_DEBUG(Input, "Loading line: {}", line);
+        std::smatch m;
+
+        std::stringstream linestream(line);
+        std::string segment;
+        std::vector<std::string> seglist;
+
+        while (std::getline(linestream, segment, ' ')) {
+            seglist.push_back(segment);
+        }
+
+        if (seglist.size() < 4) {
+            continue;
+        }
+
+        while (frame_no < std::stoi(seglist.at(0))) {
+            commands[player_index].push_back({});
+            frame_no++;
+        }
+
+        TASCommand command = {
+            .buttons = ReadCommandButtons(seglist.at(1)),
+            .l_axis = ReadCommandAxis(seglist.at(2)),
+            .r_axis = ReadCommandAxis(seglist.at(3)),
+        };
+        commands[player_index].push_back(command);
+        frame_no++;
+    }
+    LOG_INFO(Input, "TAS file loaded! {} frames", frame_no);
+}
+
+void Tas::WriteTasFile(std::u8string file_name) {
+    std::string output_text;
+    for (size_t frame = 0; frame < record_commands.size(); frame++) {
+        if (!output_text.empty()) {
+            output_text += "\n";
+        }
+        const TASCommand& line = record_commands[frame];
+        output_text += std::to_string(frame) + " " + WriteCommandButtons(line.buttons) + " " +
+                       WriteCommandAxis(line.l_axis) + " " + WriteCommandAxis(line.r_axis);
+    }
+    const auto bytes_written = Common::FS::WriteStringToFile(
+        Common::FS::GetYuzuPath(Common::FS::YuzuPath::TASDir) / file_name,
+        Common::FS::FileType::TextFile, output_text);
+    if (bytes_written == output_text.size()) {
+        LOG_INFO(Input, "TAS file written to file!");
+    } else {
+        LOG_ERROR(Input, "Writing the TAS-file has failed! {} / {} bytes written", bytes_written,
+                  output_text.size());
+    }
+}
+
+std::pair<float, float> Tas::FlipAxisY(std::pair<float, float> old) {
+    auto [x, y] = old;
+    return {x, -y};
+}
+
+void Tas::RecordInput(u32 buttons, const std::array<std::pair<float, float>, 2>& axes) {
+    last_input = {buttons, FlipAxisY(axes[0]), FlipAxisY(axes[1])};
+}
+
+std::tuple<TasState, size_t, size_t> Tas::GetStatus() const {
+    TasState state;
+    if (is_recording) {
+        return {TasState::Recording, 0, record_commands.size()};
+    }
+
+    if (is_running) {
+        state = TasState::Running;
+    } else {
+        state = TasState::Stopped;
+    }
+
+    return {state, current_command, script_length};
+}
+
+std::string Tas::DebugButtons(u32 buttons) const {
+    return fmt::format("{{ {} }}", TasInput::Tas::ButtonsToString(buttons));
+}
+
+std::string Tas::DebugJoystick(float x, float y) const {
+    return fmt::format("[ {} , {} ]", std::to_string(x), std::to_string(y));
+}
+
+std::string Tas::DebugInput(const TasData& data) const {
+    return fmt::format("{{ {} , {} , {} }}", DebugButtons(data.buttons),
+                       DebugJoystick(data.axis[0], data.axis[1]),
+                       DebugJoystick(data.axis[2], data.axis[3]));
+}
+
+std::string Tas::DebugInputs(const std::array<TasData, PLAYER_NUMBER>& arr) const {
+    std::string returns = "[ ";
+    for (size_t i = 0; i < arr.size(); i++) {
+        returns += DebugInput(arr[i]);
+        if (i != arr.size() - 1) {
+            returns += " , ";
+        }
+    }
+    return returns + "]";
+}
+
+std::string Tas::ButtonsToString(u32 button) const {
+    std::string returns;
+    for (auto [text_button, tas_button] : text_to_tas_button) {
+        if ((button & static_cast<u32>(tas_button)) != 0)
+            returns += fmt::format(", {}", text_button.substr(4));
+    }
+    return returns.empty() ? "" : returns.substr(2);
+}
+
+void Tas::UpdateThread() {
+    if (!Settings::values.tas_enable) {
+        if (is_running) {
+            Stop();
+        }
+        return;
+    }
+
+    if (is_recording) {
+        record_commands.push_back(last_input);
+    }
+    if (needs_reset) {
+        current_command = 0;
+        needs_reset = false;
+        LoadTasFiles();
+        LOG_DEBUG(Input, "tas_reset done");
+    }
+
+    if (!is_running) {
+        tas_data.fill({});
+        return;
+    }
+    if (current_command < script_length) {
+        LOG_DEBUG(Input, "Playing TAS {}/{}", current_command, script_length);
+        size_t frame = current_command++;
+        for (size_t i = 0; i < commands.size(); i++) {
+            if (frame < commands[i].size()) {
+                TASCommand command = commands[i][frame];
+                tas_data[i].buttons = command.buttons;
+                auto [l_axis_x, l_axis_y] = command.l_axis;
+                tas_data[i].axis[0] = l_axis_x;
+                tas_data[i].axis[1] = l_axis_y;
+                auto [r_axis_x, r_axis_y] = command.r_axis;
+                tas_data[i].axis[2] = r_axis_x;
+                tas_data[i].axis[3] = r_axis_y;
+            } else {
+                tas_data[i] = {};
+            }
+        }
+    } else {
+        is_running = Settings::values.tas_loop.GetValue();
+        current_command = 0;
+        tas_data.fill({});
+        if (!is_running) {
+            SwapToStoredController();
+        }
+    }
+    LOG_DEBUG(Input, "TAS inputs: {}", DebugInputs(tas_data));
+}
+
+TasAnalog Tas::ReadCommandAxis(const std::string& line) const {
+    std::stringstream linestream(line);
+    std::string segment;
+    std::vector<std::string> seglist;
+
+    while (std::getline(linestream, segment, ';')) {
+        seglist.push_back(segment);
+    }
+
+    const float x = std::stof(seglist.at(0)) / 32767.0f;
+    const float y = std::stof(seglist.at(1)) / 32767.0f;
+
+    return {x, y};
+}
+
+u32 Tas::ReadCommandButtons(const std::string& data) const {
+    std::stringstream button_text(data);
+    std::string line;
+    u32 buttons = 0;
+    while (std::getline(button_text, line, ';')) {
+        for (auto [text, tas_button] : text_to_tas_button) {
+            if (text == line) {
+                buttons |= static_cast<u32>(tas_button);
+                break;
+            }
+        }
+    }
+    return buttons;
+}
+
+std::string Tas::WriteCommandAxis(TasAnalog data) const {
+    auto [x, y] = data;
+    std::string line;
+    line += std::to_string(static_cast<int>(x * 32767));
+    line += ";";
+    line += std::to_string(static_cast<int>(y * 32767));
+    return line;
+}
+
+std::string Tas::WriteCommandButtons(u32 data) const {
+    if (data == 0) {
+        return "NONE";
+    }
+
+    std::string line;
+    u32 index = 0;
+    while (data > 0) {
+        if ((data & 1) == 1) {
+            for (auto [text, tas_button] : text_to_tas_button) {
+                if (tas_button == static_cast<TasButton>(1 << index)) {
+                    if (line.size() > 0) {
+                        line += ";";
+                    }
+                    line += text;
+                    break;
+                }
+            }
+        }
+        index++;
+        data >>= 1;
+    }
+    return line;
+}
+
+void Tas::StartStop() {
+    if (!Settings::values.tas_enable) {
+        return;
+    }
+    if (is_running) {
+        Stop();
+    } else {
+        is_running = true;
+        SwapToTasController();
+    }
+}
+
+void Tas::Stop() {
+    is_running = false;
+    SwapToStoredController();
+}
+
+void Tas::SwapToTasController() {
+    if (!Settings::values.tas_swap_controllers) {
+        return;
+    }
+    auto& players = Settings::values.players.GetValue();
+    for (std::size_t index = 0; index < players.size(); index++) {
+        auto& player = players[index];
+        player_mappings[index] = player;
+
+        // Only swap active controllers
+        if (!player.connected) {
+            continue;
+        }
+
+        Common::ParamPackage tas_param;
+        tas_param.Set("pad", static_cast<u8>(index));
+        auto button_mapping = GetButtonMappingForDevice(tas_param);
+        auto analog_mapping = GetAnalogMappingForDevice(tas_param);
+        auto& buttons = player.buttons;
+        auto& analogs = player.analogs;
+
+        for (std::size_t i = 0; i < buttons.size(); ++i) {
+            buttons[i] = button_mapping[static_cast<Settings::NativeButton::Values>(i)].Serialize();
+        }
+        for (std::size_t i = 0; i < analogs.size(); ++i) {
+            analogs[i] = analog_mapping[static_cast<Settings::NativeAnalog::Values>(i)].Serialize();
+        }
+    }
+    is_old_input_saved = true;
+    Settings::values.is_device_reload_pending.store(true);
+}
+
+void Tas::SwapToStoredController() {
+    if (!is_old_input_saved) {
+        return;
+    }
+    auto& players = Settings::values.players.GetValue();
+    for (std::size_t index = 0; index < players.size(); index++) {
+        players[index] = player_mappings[index];
+    }
+    is_old_input_saved = false;
+    Settings::values.is_device_reload_pending.store(true);
+}
+
+void Tas::Reset() {
+    if (!Settings::values.tas_enable) {
+        return;
+    }
+    needs_reset = true;
+}
+
+bool Tas::Record() {
+    if (!Settings::values.tas_enable) {
+        return true;
+    }
+    is_recording = !is_recording;
+    return is_recording;
+}
+
+void Tas::SaveRecording(bool overwrite_file) {
+    if (is_recording) {
+        return;
+    }
+    if (record_commands.empty()) {
+        return;
+    }
+    WriteTasFile(u8"record.txt");
+    if (overwrite_file) {
+        WriteTasFile(u8"script0-1.txt");
+    }
+    needs_reset = true;
+    record_commands.clear();
+}
+
+InputCommon::ButtonMapping Tas::GetButtonMappingForDevice(
+    const Common::ParamPackage& params) const {
+    // This list is missing ZL/ZR since those are not considered buttons.
+    // We will add those afterwards
+    // This list also excludes any button that can't be really mapped
+    static constexpr std::array<std::pair<Settings::NativeButton::Values, TasButton>, 20>
+        switch_to_tas_button = {
+            std::pair{Settings::NativeButton::A, TasButton::BUTTON_A},
+            {Settings::NativeButton::B, TasButton::BUTTON_B},
+            {Settings::NativeButton::X, TasButton::BUTTON_X},
+            {Settings::NativeButton::Y, TasButton::BUTTON_Y},
+            {Settings::NativeButton::LStick, TasButton::STICK_L},
+            {Settings::NativeButton::RStick, TasButton::STICK_R},
+            {Settings::NativeButton::L, TasButton::TRIGGER_L},
+            {Settings::NativeButton::R, TasButton::TRIGGER_R},
+            {Settings::NativeButton::Plus, TasButton::BUTTON_PLUS},
+            {Settings::NativeButton::Minus, TasButton::BUTTON_MINUS},
+            {Settings::NativeButton::DLeft, TasButton::BUTTON_LEFT},
+            {Settings::NativeButton::DUp, TasButton::BUTTON_UP},
+            {Settings::NativeButton::DRight, TasButton::BUTTON_RIGHT},
+            {Settings::NativeButton::DDown, TasButton::BUTTON_DOWN},
+            {Settings::NativeButton::SL, TasButton::BUTTON_SL},
+            {Settings::NativeButton::SR, TasButton::BUTTON_SR},
+            {Settings::NativeButton::Screenshot, TasButton::BUTTON_CAPTURE},
+            {Settings::NativeButton::Home, TasButton::BUTTON_HOME},
+            {Settings::NativeButton::ZL, TasButton::TRIGGER_ZL},
+            {Settings::NativeButton::ZR, TasButton::TRIGGER_ZR},
+        };
+
+    InputCommon::ButtonMapping mapping{};
+    for (const auto& [switch_button, tas_button] : switch_to_tas_button) {
+        Common::ParamPackage button_params({{"engine", "tas"}});
+        button_params.Set("pad", params.Get("pad", 0));
+        button_params.Set("button", static_cast<int>(tas_button));
+        mapping.insert_or_assign(switch_button, std::move(button_params));
+    }
+
+    return mapping;
+}
+
+InputCommon::AnalogMapping Tas::GetAnalogMappingForDevice(
+    const Common::ParamPackage& params) const {
+
+    InputCommon::AnalogMapping mapping = {};
+    Common::ParamPackage left_analog_params;
+    left_analog_params.Set("engine", "tas");
+    left_analog_params.Set("pad", params.Get("pad", 0));
+    left_analog_params.Set("axis_x", static_cast<int>(TasAxes::StickX));
+    left_analog_params.Set("axis_y", static_cast<int>(TasAxes::StickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::LStick, std::move(left_analog_params));
+    Common::ParamPackage right_analog_params;
+    right_analog_params.Set("engine", "tas");
+    right_analog_params.Set("pad", params.Get("pad", 0));
+    right_analog_params.Set("axis_x", static_cast<int>(TasAxes::SubstickX));
+    right_analog_params.Set("axis_y", static_cast<int>(TasAxes::SubstickY));
+    mapping.insert_or_assign(Settings::NativeAnalog::RStick, std::move(right_analog_params));
+    return mapping;
+}
+
+const TasData& Tas::GetTasState(std::size_t pad) const {
+    return tas_data[pad];
+}
+} // namespace TasInput
diff --git a/src/input_common/tas/tas_input.h b/src/input_common/tas/tas_input.h
new file mode 100644
index 000000000..3e2db8f00
--- /dev/null
+++ b/src/input_common/tas/tas_input.h
@@ -0,0 +1,237 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+
+#include "common/common_types.h"
+#include "common/settings_input.h"
+#include "core/frontend/input.h"
+#include "input_common/main.h"
+
+/*
+To play back TAS scripts on Yuzu, select the folder with scripts in the configuration menu below
+Tools -> Configure TAS. The file itself has normal text format and has to be called script0-1.txt
+for controller 1, script0-2.txt for controller 2 and so forth (with max. 8 players).
+
+A script file has the same format as TAS-nx uses, so final files will look like this:
+
+1 KEY_B 0;0 0;0
+6 KEY_ZL 0;0 0;0
+41 KEY_ZL;KEY_Y 0;0 0;0
+43 KEY_X;KEY_A 32767;0 0;0
+44 KEY_A 32767;0 0;0
+45 KEY_A 32767;0 0;0
+46 KEY_A 32767;0 0;0
+47 KEY_A 32767;0 0;0
+
+After placing the file at the correct location, it can be read into Yuzu with the (default) hotkey
+CTRL+F6 (refresh). In the bottom left corner, it will display the amount of frames the script file
+has. Playback can be started or stopped using CTRL+F5.
+
+However, for playback to actually work, the correct input device has to be selected: In the Controls
+menu, select TAS from the device list for the controller that the script should be played on.
+
+Recording a new script file is really simple: Just make sure that the proper device (not TAS) is
+connected on P1, and press CTRL+F7 to start recording. When done, just press the same keystroke
+again (CTRL+F7). The new script will be saved at the location previously selected, as the filename
+record.txt.
+
+For debugging purposes, the common controller debugger can be used (View -> Debugging -> Controller
+P1).
+*/
+
+namespace TasInput {
+
+constexpr size_t PLAYER_NUMBER = 8;
+
+using TasAnalog = std::pair<float, float>;
+
+enum class TasState {
+    Running,
+    Recording,
+    Stopped,
+};
+
+enum class TasButton : u32 {
+    BUTTON_A = 1U << 0,
+    BUTTON_B = 1U << 1,
+    BUTTON_X = 1U << 2,
+    BUTTON_Y = 1U << 3,
+    STICK_L = 1U << 4,
+    STICK_R = 1U << 5,
+    TRIGGER_L = 1U << 6,
+    TRIGGER_R = 1U << 7,
+    TRIGGER_ZL = 1U << 8,
+    TRIGGER_ZR = 1U << 9,
+    BUTTON_PLUS = 1U << 10,
+    BUTTON_MINUS = 1U << 11,
+    BUTTON_LEFT = 1U << 12,
+    BUTTON_UP = 1U << 13,
+    BUTTON_RIGHT = 1U << 14,
+    BUTTON_DOWN = 1U << 15,
+    BUTTON_SL = 1U << 16,
+    BUTTON_SR = 1U << 17,
+    BUTTON_HOME = 1U << 18,
+    BUTTON_CAPTURE = 1U << 19,
+};
+
+enum class TasAxes : u8 {
+    StickX,
+    StickY,
+    SubstickX,
+    SubstickY,
+    Undefined,
+};
+
+struct TasData {
+    u32 buttons{};
+    std::array<float, 4> axis{};
+};
+
+class Tas {
+public:
+    Tas();
+    ~Tas();
+
+    // Changes the input status that will be stored in each frame
+    void RecordInput(u32 buttons, const std::array<std::pair<float, float>, 2>& axes);
+
+    // Main loop that records or executes input
+    void UpdateThread();
+
+    //  Sets the flag to start or stop the TAS command excecution and swaps controllers profiles
+    void StartStop();
+
+    //  Stop the TAS and reverts any controller profile
+    void Stop();
+
+    // Sets the flag to reload the file and start from the begining in the next update
+    void Reset();
+
+    /**
+     * Sets the flag to enable or disable recording of inputs
+     * @return Returns true if the current recording status is enabled
+     */
+    bool Record();
+
+    // Saves contents of record_commands on a file if overwrite is enabled player 1 will be
+    // overwritten with the recorded commands
+    void SaveRecording(bool overwrite_file);
+
+    /**
+     * Returns the current status values of TAS playback/recording
+     * @return Tuple of
+     * TasState indicating the current state out of Running, Recording or Stopped ;
+     * Current playback progress or amount of frames (so far) for Recording ;
+     * Total length of script file currently loaded or amount of frames (so far) for Recording
+     */
+    std::tuple<TasState, size_t, size_t> GetStatus() const;
+
+    // Retuns an array of the default button mappings
+    InputCommon::ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) const;
+
+    // Retuns an array of the default analog mappings
+    InputCommon::AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& params) const;
+    [[nodiscard]] const TasData& GetTasState(std::size_t pad) const;
+
+private:
+    struct TASCommand {
+        u32 buttons{};
+        TasAnalog l_axis{};
+        TasAnalog r_axis{};
+    };
+
+    // Loads TAS files from all players
+    void LoadTasFiles();
+
+    // Loads TAS file from the specified player
+    void LoadTasFile(size_t player_index);
+
+    // Writes a TAS file from the recorded commands
+    void WriteTasFile(std::u8string file_name);
+
+    /**
+     * Parses a string containing the axis values with the following format "x;y"
+     * X and Y have a range from -32767 to 32767
+     * @return Returns a TAS analog object with axis values with range from -1.0 to 1.0
+     */
+    TasAnalog ReadCommandAxis(const std::string& line) const;
+
+    /**
+     * Parses a string containing the button values with the following format "a;b;c;d..."
+     * Each button is represented by it's text format specified in text_to_tas_button array
+     * @return Returns a u32 with each bit representing the status of a button
+     */
+    u32 ReadCommandButtons(const std::string& line) const;
+
+    /**
+     * Converts an u32 containing the button status into the text equivalent
+     * @return Returns a string with the name of the buttons to be written to the file
+     */
+    std::string WriteCommandButtons(u32 data) const;
+
+    /**
+     * Converts an TAS analog object containing the axis status into the text equivalent
+     * @return Returns a string with the value of the axis to be written to the file
+     */
+    std::string WriteCommandAxis(TasAnalog data) const;
+
+    // Inverts the Y axis polarity
+    std::pair<float, float> FlipAxisY(std::pair<float, float> old);
+
+    /**
+     * Converts an u32 containing the button status into the text equivalent
+     * @return Returns a string with the name of the buttons to be printed on console
+     */
+    std::string DebugButtons(u32 buttons) const;
+
+    /**
+     * Converts an TAS analog object containing the axis status into the text equivalent
+     * @return Returns a string with the value of the axis to be printed on console
+     */
+    std::string DebugJoystick(float x, float y) const;
+
+    /**
+     * Converts the given TAS status into the text equivalent
+     * @return Returns a string with the value of the TAS status to be printed on console
+     */
+    std::string DebugInput(const TasData& data) const;
+
+    /**
+     * Converts the given TAS status of multiple players into the text equivalent
+     * @return Returns a string with the value of the status of all TAS players to be printed on
+     * console
+     */
+    std::string DebugInputs(const std::array<TasData, PLAYER_NUMBER>& arr) const;
+
+    /**
+     * Converts an u32 containing the button status into the text equivalent
+     * @return Returns a string with the name of the buttons
+     */
+    std::string ButtonsToString(u32 button) const;
+
+    // Stores current controller configuration and sets a TAS controller for every active controller
+    // to the current config
+    void SwapToTasController();
+
+    // Sets the stored controller configuration to the current config
+    void SwapToStoredController();
+
+    size_t script_length{0};
+    std::array<TasData, PLAYER_NUMBER> tas_data;
+    bool is_old_input_saved{false};
+    bool is_recording{false};
+    bool is_running{false};
+    bool needs_reset{false};
+    std::array<std::vector<TASCommand>, PLAYER_NUMBER> commands{};
+    std::vector<TASCommand> record_commands{};
+    size_t current_command{0};
+    TASCommand last_input{}; // only used for recording
+
+    // Old settings for swapping controllers
+    std::array<Settings::PlayerInput, 10> player_mappings;
+};
+} // namespace TasInput
diff --git a/src/input_common/tas/tas_poller.cpp b/src/input_common/tas/tas_poller.cpp
new file mode 100644
index 000000000..15810d6b0
--- /dev/null
+++ b/src/input_common/tas/tas_poller.cpp
@@ -0,0 +1,101 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#include <mutex>
+#include <utility>
+
+#include "common/settings.h"
+#include "common/threadsafe_queue.h"
+#include "input_common/tas/tas_input.h"
+#include "input_common/tas/tas_poller.h"
+
+namespace InputCommon {
+
+class TasButton final : public Input::ButtonDevice {
+public:
+    explicit TasButton(u32 button_, u32 pad_, const TasInput::Tas* tas_input_)
+        : button(button_), pad(pad_), tas_input(tas_input_) {}
+
+    bool GetStatus() const override {
+        return (tas_input->GetTasState(pad).buttons & button) != 0;
+    }
+
+private:
+    const u32 button;
+    const u32 pad;
+    const TasInput::Tas* tas_input;
+};
+
+TasButtonFactory::TasButtonFactory(std::shared_ptr<TasInput::Tas> tas_input_)
+    : tas_input(std::move(tas_input_)) {}
+
+std::unique_ptr<Input::ButtonDevice> TasButtonFactory::Create(const Common::ParamPackage& params) {
+    const auto button_id = params.Get("button", 0);
+    const auto pad = params.Get("pad", 0);
+
+    return std::make_unique<TasButton>(button_id, pad, tas_input.get());
+}
+
+class TasAnalog final : public Input::AnalogDevice {
+public:
+    explicit TasAnalog(u32 pad_, u32 axis_x_, u32 axis_y_, const TasInput::Tas* tas_input_)
+        : pad(pad_), axis_x(axis_x_), axis_y(axis_y_), tas_input(tas_input_) {}
+
+    float GetAxis(u32 axis) const {
+        std::lock_guard lock{mutex};
+        return tas_input->GetTasState(pad).axis.at(axis);
+    }
+
+    std::pair<float, float> GetAnalog(u32 analog_axis_x, u32 analog_axis_y) const {
+        float x = GetAxis(analog_axis_x);
+        float y = GetAxis(analog_axis_y);
+
+        // Make sure the coordinates are in the unit circle,
+        // otherwise normalize it.
+        float r = x * x + y * y;
+        if (r > 1.0f) {
+            r = std::sqrt(r);
+            x /= r;
+            y /= r;
+        }
+
+        return {x, y};
+    }
+
+    std::tuple<float, float> GetStatus() const override {
+        return GetAnalog(axis_x, axis_y);
+    }
+
+    Input::AnalogProperties GetAnalogProperties() const override {
+        return {0.0f, 1.0f, 0.5f};
+    }
+
+private:
+    const u32 pad;
+    const u32 axis_x;
+    const u32 axis_y;
+    const TasInput::Tas* tas_input;
+    mutable std::mutex mutex;
+};
+
+/// An analog device factory that creates analog devices from GC Adapter
+TasAnalogFactory::TasAnalogFactory(std::shared_ptr<TasInput::Tas> tas_input_)
+    : tas_input(std::move(tas_input_)) {}
+
+/**
+ * Creates analog device from joystick axes
+ * @param params contains parameters for creating the device:
+ *     - "port": the nth gcpad on the adapter
+ *     - "axis_x": the index of the axis to be bind as x-axis
+ *     - "axis_y": the index of the axis to be bind as y-axis
+ */
+std::unique_ptr<Input::AnalogDevice> TasAnalogFactory::Create(const Common::ParamPackage& params) {
+    const auto pad = static_cast<u32>(params.Get("pad", 0));
+    const auto axis_x = static_cast<u32>(params.Get("axis_x", 0));
+    const auto axis_y = static_cast<u32>(params.Get("axis_y", 1));
+
+    return std::make_unique<TasAnalog>(pad, axis_x, axis_y, tas_input.get());
+}
+
+} // namespace InputCommon
diff --git a/src/input_common/tas/tas_poller.h b/src/input_common/tas/tas_poller.h
new file mode 100644
index 000000000..09e426cef
--- /dev/null
+++ b/src/input_common/tas/tas_poller.h
@@ -0,0 +1,43 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include "core/frontend/input.h"
+#include "input_common/tas/tas_input.h"
+
+namespace InputCommon {
+
+/**
+ * A button device factory representing a tas bot. It receives tas events and forward them
+ * to all button devices it created.
+ */
+class TasButtonFactory final : public Input::Factory<Input::ButtonDevice> {
+public:
+    explicit TasButtonFactory(std::shared_ptr<TasInput::Tas> tas_input_);
+
+    /**
+     * Creates a button device from a button press
+     * @param params contains parameters for creating the device:
+     *     - "code": the code of the key to bind with the button
+     */
+    std::unique_ptr<Input::ButtonDevice> Create(const Common::ParamPackage& params) override;
+
+private:
+    std::shared_ptr<TasInput::Tas> tas_input;
+};
+
+/// An analog device factory that creates analog devices from tas
+class TasAnalogFactory final : public Input::Factory<Input::AnalogDevice> {
+public:
+    explicit TasAnalogFactory(std::shared_ptr<TasInput::Tas> tas_input_);
+
+    std::unique_ptr<Input::AnalogDevice> Create(const Common::ParamPackage& params) override;
+
+private:
+    std::shared_ptr<TasInput::Tas> tas_input;
+};
+
+} // namespace InputCommon