// SPDX-License-Identifier: GPL-2.0-only
#ifndef GXFP_SESSION_H
#define GXFP_SESSION_H

#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

struct gxfp_session;

enum gxfp_session_state {
        GXFP_SESSION_OPEN = 0,
        GXFP_SESSION_ACTIVE,
        GXFP_SESSION_WAITING_FINGER_DOWN,
        GXFP_SESSION_FINGER_PRESENT,
        GXFP_SESSION_CAPTURING,
        GXFP_SESSION_WAITING_FINGER_UP,
        GXFP_SESSION_ERROR,
};

struct gxfp_image12 {
        uint16_t *pixels;
        size_t width;
        size_t height;
        uint8_t header[5];
        uint8_t trailer;
        uint32_t crc_stored;
        uint32_t crc_calculated;
};

int gxfp_session_open(struct gxfp_session **out, const char *device_path);
int gxfp_session_activate(struct gxfp_session *session, int timeout_ms);
int gxfp_session_deactivate(struct gxfp_session *session);

int gxfp_session_arm_finger_down(struct gxfp_session *session);
int gxfp_session_wait_finger_down(struct gxfp_session *session, int timeout_ms);
int gxfp_session_capture(struct gxfp_session *session,
                         struct gxfp_image12 *image, int timeout_ms);
int gxfp_session_arm_finger_up(struct gxfp_session *session);
int gxfp_session_wait_finger_up(struct gxfp_session *session, int timeout_ms);

int gxfp_image12_to_u8(const struct gxfp_image12 *source,
                       uint8_t *destination, size_t destination_size);
void gxfp_image12_clear(struct gxfp_image12 *image);

void gxfp_session_cancel(struct gxfp_session *session);
enum gxfp_session_state
gxfp_session_get_state(const struct gxfp_session *session);
void gxfp_session_close(struct gxfp_session *session);

#ifdef __cplusplus
}
#endif

#endif