1 files changed, 200 insertions, 0 deletions

diff --git a/src/input_common/drivers/tas_input.h b/src/input_common/drivers/tas_input.h
new file mode 100644
index 000000000..9fadc118b
--- /dev/null
+++ b/src/input_common/drivers/tas_input.h
@@ -0,0 +1,200 @@
+// 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 "input_common/input_engine.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 InputCommon::TasInput {
+
+constexpr size_t PLAYER_NUMBER = 10;
+
+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,
+};
+
+struct TasAnalog {
+    float x{};
+    float y{};
+};
+
+enum class TasState {
+    Running,
+    Recording,
+    Stopped,
+};
+
+class Tas final : public InputCommon::InputEngine {
+public:
+    explicit Tas(const std::string input_engine_);
+    ~Tas();
+
+    /**
+     * Changes the input status that will be stored in each frame
+     * @param buttons: bitfield with the status of the buttons
+     * @param left_axis: value of the left axis
+     * @param right_axis: value of the right axis
+     */
+    void RecordInput(u32 buttons, TasAnalog left_axis, TasAnalog right_axis);
+
+    // 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
+     * @param overwrite_file: Indicates if player 1 should be overwritten
+     */
+    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 ;
+     * Current playback progress ;
+     * Total length of script file currently loaded or being recorded
+     */
+    std::tuple<TasState, size_t, size_t> GetStatus() 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
+     * @param player_index: player number where data is going to be stored
+     */
+    void LoadTasFile(size_t player_index);
+
+    /** Writes a TAS file from the recorded commands
+     * @param file_name: name of the file to be written
+     */
+    void WriteTasFile(std::u8string file_name);
+
+    /** Inverts the Y axis polarity
+     * @param old: value of the axis
+     * @return new value of the axis
+     */
+    TasAnalog FlipAxisY(TasAnalog old);
+
+    /**
+     * Parses a string containing the axis values. X and Y have a range from -32767 to 32767
+     * @param line: string containing axis values with the following format "x;y"
+     * @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. Each button is represented by it's text format
+     * specified in text_to_tas_button array
+     * @param line: string containing button name with the following format "a;b;c;d..."
+     * @return Returns a u32 with each bit representing the status of a button
+     */
+    u32 ReadCommandButtons(const std::string& line) const;
+
+    /**
+     * Reset state of all players
+     */
+    void ClearInput();
+
+    /**
+     * Converts an u32 containing the button status into the text equivalent
+     * @param buttons: bitfield with the status of the buttons
+     * @return Returns a string with the name of the buttons to be written to the file
+     */
+    std::string WriteCommandButtons(u32 buttons) const;
+
+    /**
+     * Converts an TAS analog object containing the axis status into the text equivalent
+     * @param data: value of the axis
+     * @return A string with the value of the axis to be written to the file
+     */
+    std::string WriteCommandAxis(TasAnalog data) const;
+
+    size_t script_length{0};
+    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
+};
+} // namespace InputCommon::TasInput