godot/platform/x11/joypad_linux.h

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/*  joypad_linux.h                                                       */
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//author: Andreas Haas <hondres,  liugam3@gmail.com>
#ifndef JOYPAD_LINUX_H
#define JOYPAD_LINUX_H

#ifdef JOYDEV_ENABLED
#include "core/input/input.h"
#include "core/os/mutex.h"
#include "core/os/thread.h"

struct input_absinfo;

class JoypadLinux {
public:
	JoypadLinux(Input *in);
	~JoypadLinux();
	void process_joypads();

private:
	enum {
		JOYPADS_MAX = 16,
		MAX_ABS = 63,
		MAX_KEY = 767, // Hack because <linux/input.h> can't be included here
	};

	struct Joypad {
		Input::JoyAxis curr_axis[MAX_ABS];
		int key_map[MAX_KEY];
		int abs_map[MAX_ABS];
		int dpad;
		int fd;

		String devpath;
		input_absinfo *abs_info[MAX_ABS];

		bool force_feedback;
		int ff_effect_id;
		uint64_t ff_effect_timestamp;

		Joypad();
		~Joypad();
		void reset();
	};

	bool exit_udev;
	Mutex joy_mutex;
	Thread *joy_thread;
	Input *input;
	Joypad joypads[JOYPADS_MAX];
	Vector<String> attached_devices;

	static void joy_thread_func(void *p_user);

	int get_joy_from_path(String p_path) const;

	void setup_joypad_properties(int p_id);
	void close_joypad(int p_id = -1);
#ifdef UDEV_ENABLED
	void enumerate_joypads(struct udev *p_udev);
	void monitor_joypads(struct udev *p_udev);
#endif
	void monitor_joypads();
	void run_joypad_thread();
	void open_joypad(const char *p_path);

	void joypad_vibration_start(int p_id, float p_weak_magnitude, float p_strong_magnitude, float p_duration, uint64_t p_timestamp);
	void joypad_vibration_stop(int p_id, uint64_t p_timestamp);

	Input::JoyAxis axis_correct(const input_absinfo *p_abs, int p_value) const;
};

#endif
#endif // JOYPAD_LINUX_H