7 files changed, 722 insertions, 0 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..4f170493e 100644
--- a/src/input_common/main.cpp
+++ b/src/input_common/main.cpp
@@ -13,6 +13,8 @@
 #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 +62,12 @@ 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() {
@@ -94,12 +102,19 @@ 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 {
         std::vector<Common::ParamPackage> devices = {
             Common::ParamPackage{{"display", "Any"}, {"class", "any"}},
             Common::ParamPackage{{"display", "Keyboard/Mouse"}, {"class", "keyboard"}},
+            Common::ParamPackage{{"display", "TAS"}, {"class", "tas"}},
         };
 #ifdef HAVE_SDL2
         auto sdl_devices = sdl->GetInputDevices();
@@ -120,6 +135,9 @@ 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 +154,9 @@ 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 +195,12 @@ 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 +231,14 @@ 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 +319,22 @@ 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;
diff --git a/src/input_common/main.h b/src/input_common/main.h
index 5d6f26385..1d06fc5f5 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
@@ -168,6 +179,18 @@ public:
     /// Retrieves the underlying udp 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 touch handler.
+    [[nodiscard]] TasAnalogFactory* GetTasAnalogs();
+
+    /// Retrieves the underlying tas touch 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..343641945
--- /dev/null
+++ b/src/input_common/tas/tas_input.cpp
@@ -0,0 +1,340 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <chrono>
+#include <cstring>
+#include <functional>
+#include <random>
+#include <regex>
+#include <thread>
+#include <boost/asio.hpp>
+
+#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 {
+
+Tas::Tas() {
+    LoadTasFiles();
+}
+
+Tas::~Tas() {
+    update_thread_running = false;
+}
+
+void Tas::RefreshTasFile() {
+    refresh_tas_fle = true;
+}
+void Tas::LoadTasFiles() {
+    scriptLength = 0;
+    for (int i = 0; i < PLAYER_NUMBER; i++) {
+        LoadTasFile(i);
+        if (newCommands[i].size() > scriptLength)
+            scriptLength = newCommands[i].size();
+    }
+}
+void Tas::LoadTasFile(int playerIndex) {
+    LOG_DEBUG(Input, "LoadTasFile()");
+    if (!newCommands[playerIndex].empty()) {
+        newCommands[playerIndex].clear();
+    }
+    std::string file = Common::FS::ReadStringFromFile(
+        Common::FS::GetYuzuPathString(Common::FS::YuzuPath::TASFile) + "script0-" +
+            std::to_string(playerIndex + 1) + ".txt",
+        Common::FS::FileType::BinaryFile);
+    std::stringstream command_line(file);
+    std::string line;
+    int frameNo = 0;
+    TASCommand empty = {.buttons = 0, .l_axis = {0.f, 0.f}, .r_axis = {0.f, 0.f}};
+    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 (frameNo < std::stoi(seglist.at(0))) {
+            newCommands[playerIndex].push_back(empty);
+            frameNo++;
+        }
+
+        TASCommand command = {
+            .buttons = ReadCommandButtons(seglist.at(1)),
+            .l_axis = ReadCommandAxis(seglist.at(2)),
+            .r_axis = ReadCommandAxis(seglist.at(3)),
+        };
+        newCommands[playerIndex].push_back(command);
+        frameNo++;
+    }
+    LOG_INFO(Input, "TAS file loaded! {} frames", frameNo);
+}
+
+void Tas::WriteTasFile() {
+    LOG_DEBUG(Input, "WriteTasFile()");
+    std::string output_text = "";
+    for (int frame = 0; frame < (signed)recordCommands.size(); frame++) {
+        if (!output_text.empty())
+            output_text += "\n";
+        TASCommand line = recordCommands.at(frame);
+        output_text += std::to_string(frame) + " " + WriteCommandButtons(line.buttons) + " " +
+                       WriteCommandAxis(line.l_axis) + " " + WriteCommandAxis(line.r_axis);
+    }
+    size_t bytesWritten = Common::FS::WriteStringToFile(
+        Common::FS::GetYuzuPathString(Common::FS::YuzuPath::TASFile) + "record.txt",
+        Common::FS::FileType::TextFile, output_text);
+    if (bytesWritten == output_text.size())
+        LOG_INFO(Input, "TAS file written to file!");
+    else
+        LOG_ERROR(Input, "Writing the TAS-file has failed! {} / {} bytes written", bytesWritten,
+                  output_text.size());
+}
+
+void Tas::RecordInput(u32 buttons, std::array<std::pair<float, float>, 2> axes) {
+    lastInput = {buttons, flipY(axes[0]), flipY(axes[1])};
+}
+
+std::pair<float, float> Tas::flipY(std::pair<float, float> old) const {
+    auto [x, y] = old;
+    return {x, -y};
+}
+
+std::string Tas::GetStatusDescription() {
+    if (Settings::values.tas_record) {
+        return "Recording TAS: " + std::to_string(recordCommands.size());
+    }
+    if (Settings::values.tas_enable) {
+        return "Playing TAS: " + std::to_string(current_command) + "/" +
+               std::to_string(scriptLength);
+    }
+    return "TAS not running: " + std::to_string(current_command) + "/" +
+           std::to_string(scriptLength);
+}
+
+std::string debugButtons(u32 buttons) {
+    return "{ " + TasInput::Tas::buttonsToString(buttons) + " }";
+}
+
+std::string debugJoystick(float x, float y) {
+    return "[ " + std::to_string(x) + "," + std::to_string(y) + " ]";
+}
+
+std::string debugInput(TasData data) {
+    return "{ " + debugButtons(data.buttons) + " , " + debugJoystick(data.axis[0], data.axis[1]) +
+           " , " + debugJoystick(data.axis[2], data.axis[3]) + " }";
+}
+
+std::string debugInputs(std::array<TasData, PLAYER_NUMBER> arr) {
+    std::string returns = "[ ";
+    for (size_t i = 0; i < arr.size(); i++) {
+        returns += debugInput(arr[i]);
+        if (i != arr.size() - 1)
+            returns += " , ";
+    }
+    return returns + "]";
+}
+
+void Tas::UpdateThread() {
+    if (update_thread_running) {
+        if (Settings::values.pauseTasOnLoad && Settings::values.cpuBoosted) {
+            for (int i = 0; i < PLAYER_NUMBER; i++) {
+                tas_data[i].buttons = 0;
+                tas_data[i].axis = {};
+            }
+        }
+
+        if (Settings::values.tas_record) {
+            recordCommands.push_back(lastInput);
+        }
+        if (!Settings::values.tas_record && !recordCommands.empty()) {
+            WriteTasFile();
+            Settings::values.tas_reset = true;
+            refresh_tas_fle = true;
+            recordCommands.clear();
+        }
+        if (Settings::values.tas_reset) {
+            current_command = 0;
+            if (refresh_tas_fle) {
+                LoadTasFiles();
+                refresh_tas_fle = false;
+            }
+            Settings::values.tas_reset = false;
+            LoadTasFiles();
+            LOG_DEBUG(Input, "tas_reset done");
+        }
+        if (Settings::values.tas_enable) {
+            if ((signed)current_command < scriptLength) {
+                LOG_INFO(Input, "Playing TAS {}/{}", current_command, scriptLength);
+                size_t frame = current_command++;
+                for (int i = 0; i < PLAYER_NUMBER; i++) {
+                    if (frame < newCommands[i].size()) {
+                        TASCommand command = newCommands[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].buttons = 0;
+                        tas_data[i].axis = {};
+                    }
+                }
+            } else {
+                Settings::values.tas_enable = false;
+                current_command = 0;
+                for (int i = 0; i < PLAYER_NUMBER; i++) {
+                    tas_data[i].buttons = 0;
+                    tas_data[i].axis = {};
+                }
+            }
+        } else {
+            for (int i = 0; i < PLAYER_NUMBER; i++) {
+                tas_data[i].buttons = 0;
+                tas_data[i].axis = {};
+            }
+        }
+    }
+    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.f;
+    const float y = std::stof(seglist.at(1)) / 32767.f;
+
+    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;
+}
+
+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..0a152a04f
--- /dev/null
+++ b/src/input_common/tas/tas_input.h
@@ -0,0 +1,163 @@
+// Copyright 2020 yuzu Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <array>
+#include <mutex>
+#include <thread>
+
+#include "common/common_types.h"
+#include "core/frontend/input.h"
+#include "input_common/main.h"
+
+#define PLAYER_NUMBER 8
+
+namespace TasInput {
+
+using TasAnalog = std::tuple<float, float>;
+
+enum class TasButton : u32 {
+    BUTTON_A = 0x000001,
+    BUTTON_B = 0x000002,
+    BUTTON_X = 0x000004,
+    BUTTON_Y = 0x000008,
+    STICK_L = 0x000010,
+    STICK_R = 0x000020,
+    TRIGGER_L = 0x000040,
+    TRIGGER_R = 0x000080,
+    TRIGGER_ZL = 0x000100,
+    TRIGGER_ZR = 0x000200,
+    BUTTON_PLUS = 0x000400,
+    BUTTON_MINUS = 0x000800,
+    BUTTON_LEFT = 0x001000,
+    BUTTON_UP = 0x002000,
+    BUTTON_RIGHT = 0x004000,
+    BUTTON_DOWN = 0x008000,
+    BUTTON_SL = 0x010000,
+    BUTTON_SR = 0x020000,
+    BUTTON_HOME = 0x040000,
+    BUTTON_CAPTURE = 0x080000,
+};
+
+static const std::array<std::pair<std::string, 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},
+};
+
+enum class TasAxes : u8 {
+    StickX,
+    StickY,
+    SubstickX,
+    SubstickY,
+    Undefined,
+};
+
+struct TasData {
+    u32 buttons{};
+    std::array<float, 4> axis{};
+};
+
+class Tas {
+public:
+    Tas();
+    ~Tas();
+
+    static std::string buttonsToString(u32 button) {
+        std::string returns;
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_A)) != 0)
+            returns += ", A";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_B)) != 0)
+            returns += ", B";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_X)) != 0)
+            returns += ", X";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_Y)) != 0)
+            returns += ", Y";
+        if ((button & static_cast<u32>(TasInput::TasButton::STICK_L)) != 0)
+            returns += ", STICK_L";
+        if ((button & static_cast<u32>(TasInput::TasButton::STICK_R)) != 0)
+            returns += ", STICK_R";
+        if ((button & static_cast<u32>(TasInput::TasButton::TRIGGER_L)) != 0)
+            returns += ", TRIGGER_L";
+        if ((button & static_cast<u32>(TasInput::TasButton::TRIGGER_R)) != 0)
+            returns += ", TRIGGER_R";
+        if ((button & static_cast<u32>(TasInput::TasButton::TRIGGER_ZL)) != 0)
+            returns += ", TRIGGER_ZL";
+        if ((button & static_cast<u32>(TasInput::TasButton::TRIGGER_ZR)) != 0)
+            returns += ", TRIGGER_ZR";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_PLUS)) != 0)
+            returns += ", PLUS";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_MINUS)) != 0)
+            returns += ", MINUS";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_LEFT)) != 0)
+            returns += ", LEFT";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_UP)) != 0)
+            returns += ", UP";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_RIGHT)) != 0)
+            returns += ", RIGHT";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_DOWN)) != 0)
+            returns += ", DOWN";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_SL)) != 0)
+            returns += ", SL";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_SR)) != 0)
+            returns += ", SR";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_HOME)) != 0)
+            returns += ", HOME";
+        if ((button & static_cast<u32>(TasInput::TasButton::BUTTON_CAPTURE)) != 0)
+            returns += ", CAPTURE";
+        return returns.length() != 0 ? returns.substr(2) : "";
+    }
+
+    void RefreshTasFile();
+    void LoadTasFiles();
+    void RecordInput(u32 buttons, std::array<std::pair<float, float>, 2> axes);
+    void UpdateThread();
+    std::string GetStatusDescription();
+
+    InputCommon::ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& params) const;
+    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{};
+    };
+    void LoadTasFile(int playerIndex);
+    void WriteTasFile();
+    TasAnalog ReadCommandAxis(const std::string line) const;
+    u32 ReadCommandButtons(const std::string line) const;
+    std::string WriteCommandButtons(u32 data) const;
+    std::string WriteCommandAxis(TasAnalog data) const;
+    std::pair<float, float> flipY(std::pair<float, float> old) const;
+
+    size_t scriptLength{0};
+    std::array<TasData, PLAYER_NUMBER> tas_data;
+    bool update_thread_running{true};
+    bool refresh_tas_fle{false};
+    std::array<std::vector<TASCommand>, PLAYER_NUMBER> newCommands{};
+    std::vector<TASCommand> recordCommands{};
+    std::size_t current_command{0};
+    TASCommand lastInput{}; // only used for recording
+};
+} // 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..1bc0d173b
--- /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 mouse. It receives mouse 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 mouse
+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