1 files changed, 315 insertions, 0 deletions
diff --git a/src/input_common/drivers/tas_input.cpp b/src/input_common/drivers/tas_input.cpp
new file mode 100644
index 000000000..0e01fb0d9
--- /dev/null
+++ b/src/input_common/drivers/tas_input.cpp
@@ -0,0 +1,315 @@
+// Copyright 2021 yuzu Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include <cstring>
+#include <regex>
+#include <fmt/format.h>
+
+#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/drivers/tas_input.h"
+
+namespace InputCommon::TasInput {
+
+enum TasAxes : u8 {
+    StickX,
+    StickY,
+    SubstickX,
+    SubstickY,
+    Undefined,
+};
+
+// 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(const std::string& input_engine_) : InputCommon::InputEngine(input_engine_) {
+    for (size_t player_index = 0; player_index < PLAYER_NUMBER; player_index++) {
+        PadIdentifier identifier{
+            .guid = Common::UUID{},
+            .port = player_index,
+            .pad = 0,
+        };
+        PreSetController(identifier);
+    }
+    ClearInput();
+    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, 0);
+        if (commands[i].size() > script_length) {
+            script_length = commands[i].size();
+        }
+    }
+}
+
+void Tas::LoadTasFile(size_t player_index, size_t file_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("script{}-{}.txt", file_index, 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;
+        }
+        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++) {
+        const TASCommand& line = record_commands[frame];
+        output_text += fmt::format("{} {} {} {}\n", 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());
+    }
+}
+
+void Tas::RecordInput(u64 buttons, TasAnalog left_axis, TasAnalog right_axis) {
+    last_input = {
+        .buttons = buttons,
+        .l_axis = left_axis,
+        .r_axis = right_axis,
+    };
+}
+
+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};
+}
+
+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) {
+        ClearInput();
+        return;
+    }
+    if (current_command < script_length) {
+        LOG_DEBUG(Input, "Playing TAS {}/{}", current_command, script_length);
+        const size_t frame = current_command++;
+        for (size_t player_index = 0; player_index < commands.size(); player_index++) {
+            TASCommand command{};
+            if (frame < commands[player_index].size()) {
+                command = commands[player_index][frame];
+            }
+
+            PadIdentifier identifier{
+                .guid = Common::UUID{},
+                .port = player_index,
+                .pad = 0,
+            };
+            for (std::size_t i = 0; i < sizeof(command.buttons) * 8; ++i) {
+                const bool button_status = (command.buttons & (1LLU << i)) != 0;
+                const int button = static_cast<int>(i);
+                SetButton(identifier, button, button_status);
+            }
+            SetAxis(identifier, TasAxes::StickX, command.l_axis.x);
+            SetAxis(identifier, TasAxes::StickY, command.l_axis.y);
+            SetAxis(identifier, TasAxes::SubstickX, command.r_axis.x);
+            SetAxis(identifier, TasAxes::SubstickY, command.r_axis.y);
+        }
+    } else {
+        is_running = Settings::values.tas_loop.GetValue();
+        LoadTasFiles();
+        current_command = 0;
+        ClearInput();
+    }
+}
+
+void Tas::ClearInput() {
+    ResetButtonState();
+    ResetAnalogState();
+}
+
+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};
+}
+
+u64 Tas::ReadCommandButtons(const std::string& data) const {
+    std::stringstream button_text(data);
+    std::string line;
+    u64 buttons = 0;
+    while (std::getline(button_text, line, ';')) {
+        for (auto [text, tas_button] : text_to_tas_button) {
+            if (text == line) {
+                buttons |= static_cast<u64>(tas_button);
+                break;
+            }
+        }
+    }
+    return buttons;
+}
+
+std::string Tas::WriteCommandButtons(u64 buttons) const {
+    std::string returns = "";
+    for (auto [text_button, tas_button] : text_to_tas_button) {
+        if ((buttons & static_cast<u64>(tas_button)) != 0) {
+            returns += fmt::format("{};", text_button);
+        }
+    }
+    return returns.empty() ? "NONE" : returns;
+}
+
+std::string Tas::WriteCommandAxis(TasAnalog analog) const {
+    return fmt::format("{};{}", analog.x * 32767, analog.y * 32767);
+}
+
+void Tas::StartStop() {
+    if (!Settings::values.tas_enable) {
+        return;
+    }
+    if (is_running) {
+        Stop();
+    } else {
+        is_running = true;
+    }
+}
+
+void Tas::Stop() {
+    is_running = false;
+}
+
+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();
+}
+
+} // namespace InputCommon::TasInput