/*
    Copyright (C) 2004, 2010, 2026 Rocky Bernstein <rocky@gnu.org>
    Modeled after GNU/Linux definitions in linux/cdrom.h

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/**
   \file dvd.h
   \brief Definitions for DVD access.

   The documents we make use of are described in Multi-Media Commands
   (MMC). We will use the MMC-6 draft 2g circa 2009 described in
   https://www.13thmonkey.org/documentation/SCSI/mmc6r02g.pdf
*/

#ifndef CDIO_DVD_H_
#define CDIO_DVD_H_

#include <cdio/types.h>

/**
   Values used in a READ DVD STRUCTURE
 */
typedef enum cdio_dvd_structure {
  CDIO_DVD_STRUCT_PHYSICAL = 0x00,
  CDIO_DVD_STRUCT_COPYRIGHT = 0x01,
  CDIO_DVD_STRUCT_DISCKEY = 0x02,
  CDIO_DVD_STRUCT_BCA = 0x03,
  CDIO_DVD_STRUCT_MANUFACT = 0x04
} cdio_dvd_structure;

/**
    Media definitions for "DVD Book" from MMC-6 draft 2g, Table 399, page 403
    (PDF page 451).
*/
typedef enum cdio_dvd_book {
  CDIO_DVD_BOOK_DVD_ROM = 0b0000,    /**< DVD-ROM */
  CDIO_DVD_BOOK_DVD_RAM = 0b0001,    /**< DVD-RAM */
  CDIO_DVD_BOOK_DVD_R = 0b0010,      /**< DVD-R */
  CDIO_DVD_BOOK_DVD_RW = 0b0011,     /**< DVD-RW */
  CDIO_DVD_BOOK_HD_DVD_ROM = 0b0100, /**< HD DVD-ROM */
  CDIO_DVD_BOOK_HD_DVD_RAM = 0b0101, /**< HD DVD-RAM */
  CDIO_DVD_BOOK_HD_DVD_R = 0b0110,   /**< HD DVD-R */
  /*                         0b0111, Reserved */
  /*                         0b1000, Reserved */
  CDIO_DVD_BOOK_DVD_PRW = 0b1001, /**< DVD+RW */
  CDIO_DVD_BOOK_DVD_PR = 0b1010,  /**< DVD+R  */
  /*                         0b1011, Reserved */
  /*                         0b1100, Reserved */
  CDIO_DVD_BOOK_DVD_PRW_DL = 0b1101, /**< DVD+RW DL  */
  CDIO_DVD_BOOK_DVD_PR_DL = 0b1110   /**< DVD+R DL  */
  /*                         0b1111, Reserved */
} cdio_dvd_book;

/**
    READ DISC STRUCTURE response. Table 398 from MMC-6 2g draft.
*/
typedef struct cdio_dvd_layer {
  unsigned int book_version : 4;
  unsigned int book_type : 4;
  unsigned int min_rate : 4; /*< This the *maximum* rate field */
  unsigned int disc_size : 4;
  unsigned int layer_type : 4;
  unsigned int track_path : 1;
  unsigned int nlayers : 2;
  unsigned int track_density : 4;
  unsigned int linear_density : 4;
  unsigned int bca : 1;
  uint32_t start_sector;
  uint32_t end_sector;
  uint32_t end_sector_l0;
} cdio_dvd_layer_t;

/**
    Maximum number of layers in a DVD.
 */
#define CDIO_DVD_MAX_LAYERS 4

typedef struct cdio_dvd_physical {
  uint8_t type;
  uint8_t layer_num;
  cdio_dvd_layer_t layer[CDIO_DVD_MAX_LAYERS];
} cdio_dvd_physical_t;

typedef struct cdio_dvd_copyright {
  uint8_t type;

  uint8_t layer_num;
  uint8_t cpst;
  uint8_t rmi;
} cdio_dvd_copyright_t;

typedef struct cdio_dvd_disckey {
  uint8_t type;

  unsigned agid : 2;
  uint8_t value[2048];
} cdio_dvd_disckey_t;

typedef struct cdio_dvd_bca {
  uint8_t type;

  int len;
  uint8_t value[188];
} cdio_dvd_bca_t;

typedef struct cdio_dvd_manufact {
  uint8_t type;

  uint8_t layer_num;
  int len;
  uint8_t value[2048];
} cdio_dvd_manufact_t;

typedef union {
  uint8_t type;

  cdio_dvd_physical_t physical;
  cdio_dvd_copyright_t copyright;
  cdio_dvd_disckey_t disckey;
  cdio_dvd_bca_t bca;
  cdio_dvd_manufact_t manufact;
} cdio_dvd_struct_t;

#endif /* CDIO_DVD_H_ */