cdrom.h

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/* license:BSD-3-Clause
 * copyright-holders:Aaron Giles
***************************************************************************

    cdrom.h

    Generic MAME cd-rom implementation

***************************************************************************/

#pragma once

#ifndef __CDROM_H__
#define __CDROM_H__

#include <stdint.h>


/***************************************************************************
    CONSTANTS
***************************************************************************/

/* tracks are padded to a multiple of this many frames */
#define CD_TRACK_PADDING        (4)

#define CD_MAX_TRACKS           (99)    /* AFAIK the theoretical limit */
#define CD_MAX_SECTOR_DATA      (2352)
#define CD_MAX_SUBCODE_DATA     (96)

#define CD_FRAME_SIZE           (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA)
#define CD_FRAMES_PER_HUNK      (8)

#define CD_METADATA_WORDS       (1+(CD_MAX_TRACKS * 6))

enum
{
    CD_TRACK_MODE1 = 0,         /* mode 1 2048 bytes/sector */
    CD_TRACK_MODE1_RAW,         /* mode 1 2352 bytes/sector */
    CD_TRACK_MODE2,             /* mode 2 2336 bytes/sector */
    CD_TRACK_MODE2_FORM1,       /* mode 2 2048 bytes/sector */
    CD_TRACK_MODE2_FORM2,       /* mode 2 2324 bytes/sector */
    CD_TRACK_MODE2_FORM_MIX,    /* mode 2 2336 bytes/sector */
    CD_TRACK_MODE2_RAW,         /* mode 2 2352 bytes / sector */
    CD_TRACK_AUDIO,         /* redbook audio track 2352 bytes/sector (588 samples) */

    CD_TRACK_RAW_DONTCARE       /* special flag for cdrom_read_data: just return me whatever is there */
};

enum
{
    CD_SUB_NORMAL = 0,          /* "cooked" 96 bytes per sector */
    CD_SUB_RAW,                 /* raw uninterleaved 96 bytes per sector */
    CD_SUB_NONE                 /* no subcode data stored */
};

#define CD_FLAG_GDROM   0x00000001  /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */
#define CD_FLAG_GDROMLE 0x00000002  /* legacy GD-ROM, with little-endian CDDA data */

/***************************************************************************
    FUNCTION PROTOTYPES
***************************************************************************/

#ifdef WANT_RAW_DATA_SECTOR
/* ECC utilities */
int ecc_verify(const uint8_t *sector);
void ecc_generate(uint8_t *sector);
void ecc_clear(uint8_t *sector);
#endif

#endif  /* __CDROM_H__ */