cammy/include/cammy/sram.h

#ifndef _CAMMY_SRAM_H
#define _CAMMY_SRAM_H

#include <stdint.h>

#define CAMMY_SRAM_SCRATCH_SIZE     4604
#define CAMMY_SRAM_SCRATCH_2_SIZE      4
#define CAMMY_SRAM_TILE_SIZE          16
#define CAMMY_SRAM_PHOTO_SIZE       3584
#define CAMMY_SRAM_THUMB_SIZE        256

#define CAMMY_SRAM_PHOTO_TILES_WIDTH  16
#define CAMMY_SRAM_PHOTO_TILES_HEIGHT 14

#define CAMMY_SRAM_THUMB_TILES_WIDTH   4
#define CAMMY_SRAM_THUMB_TILES_HEIGHT  4

#define CAMMY_SRAM_INFO_SIZE         256

#define CAMMY_SRAM_FRAME_COUNT        30

#pragma pack(1)
#pragma pack(push)

typedef struct _cammy_sram_tile {
    uint8_t data[CAMMY_SRAM_TILE_SIZE];
} cammy_sram_tile;

typedef struct _cammy_sram_thumb {
    cammy_sram_tile rows[CAMMY_SRAM_THUMB_TILES_HEIGHT]
                        [CAMMY_SRAM_THUMB_TILES_WIDTH];
} cammy_sram_thumb;

typedef struct _cammy_sram_photo {
    cammy_sram_tile rows[CAMMY_SRAM_PHOTO_TILES_HEIGHT]
                        [CAMMY_SRAM_PHOTO_TILES_WIDTH];
} cammy_sram_photo;

typedef struct _cammy_sram_frame {
    cammy_sram_photo photo;
    cammy_sram_thumb thumb;
             uint8_t info[CAMMY_SRAM_INFO_SIZE];
} cammy_sram_frame;

typedef struct _cammy_sram_data {
             uint8_t scratch[CAMMY_SRAM_SCRATCH_SIZE];
    cammy_sram_photo gameface;
             uint8_t scratch_2[CAMMY_SRAM_SCRATCH_2_SIZE];

    cammy_sram_frame frames[CAMMY_SRAM_FRAME_COUNT];
} cammy_sram_data;

typedef struct _cammy_sram {
    int fd;

    cammy_sram_data *data;

    size_t size,
           page_size,
           mapped_size;
} cammy_sram;

#pragma pack(pop)

cammy_sram *cammy_sram_open(const char *file);

void cammy_sram_close(cammy_sram *sram);

#endif /* _CAMMY_SRAM_H */