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/os/mutex.h"
#include "core/os/thread.h"
#include "main/input_default.h"

struct input_absinfo;

class JoypadLinux {
public:
	JoypadLinux(InputDefault *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 JoypadEvent {
		uint16_t type;
		uint16_t code;
		int32_t value;
	};

	struct Joypad {
		float 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;

		LocalVector<JoypadEvent> events;

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

#ifdef UDEV_ENABLED
	bool use_udev;
#endif
	InputDefault *input;

	SafeFlag monitor_joypads_exit;
	SafeFlag joypad_events_exit;
	Thread monitor_joypads_thread;
	Thread joypad_events_thread;

	Joypad joypads[JOYPADS_MAX];
	Mutex joypads_mutex[JOYPADS_MAX];

	Vector<String> attached_devices;

	static void monitor_joypads_thread_func(void *p_user);
	void monitor_joypads_thread_run();

	void open_joypad(const char *p_path);
	void setup_joypad_properties(Joypad &p_joypad);

	void close_joypads();
	void close_joypad(const char *p_devpath);
	void close_joypad(Joypad &p_joypad, int p_id);

#ifdef UDEV_ENABLED
	void enumerate_joypads(struct udev *p_udev);
	void monitor_joypads(struct udev *p_udev);
#endif
	void monitor_joypads();

	void joypad_vibration_start(Joypad &p_joypad, float p_weak_magnitude, float p_strong_magnitude, float p_duration, uint64_t p_timestamp);
	void joypad_vibration_stop(Joypad &p_joypad, uint64_t p_timestamp);

	static void joypad_events_thread_func(void *p_user);
	void joypad_events_thread_run();

	float axis_correct(const input_absinfo *p_abs, int p_value) const;
};

#endif

#endif // JOYPAD_LINUX_H