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folium-app
GitHub Repository: folium-app/Folium
 Path: blob/a-new-beginning/SharedDependencies/Sources/libchdr/include/cdrom.h
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/* license:BSD-3-Clause

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 * copyright-holders:Aaron Giles

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***************************************************************************

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    cdrom.h

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    Generic MAME cd-rom implementation

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

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#pragma once

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#ifndef __CDROM_H__

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#define __CDROM_H__

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#include <stdint.h>

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

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    CONSTANTS

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

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/* tracks are padded to a multiple of this many frames */

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extern const uint32_t CD_TRACK_PADDING;

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#define CD_MAX_TRACKS           (99)    /* AFAIK the theoretical limit */

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#define CD_MAX_SECTOR_DATA      (2352)

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#define CD_MAX_SUBCODE_DATA     (96)

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#define CD_FRAME_SIZE           (CD_MAX_SECTOR_DATA + CD_MAX_SUBCODE_DATA)

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#define CD_FRAMES_PER_HUNK      (8)

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

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enum

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{

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	CD_TRACK_MODE1 = 0,         /* mode 1 2048 bytes/sector */

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	CD_TRACK_MODE1_RAW,         /* mode 1 2352 bytes/sector */

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	CD_TRACK_MODE2,             /* mode 2 2336 bytes/sector */

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	CD_TRACK_MODE2_FORM1,       /* mode 2 2048 bytes/sector */

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	CD_TRACK_MODE2_FORM2,       /* mode 2 2324 bytes/sector */

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	CD_TRACK_MODE2_FORM_MIX,    /* mode 2 2336 bytes/sector */

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	CD_TRACK_MODE2_RAW,         /* mode 2 2352 bytes / sector */

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	CD_TRACK_AUDIO,         /* redbook audio track 2352 bytes/sector (588 samples) */

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

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};

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enum

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{

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	CD_SUB_NORMAL = 0,          /* "cooked" 96 bytes per sector */

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	CD_SUB_RAW,                 /* raw uninterleaved 96 bytes per sector */

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	CD_SUB_NONE                 /* no subcode data stored */

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};

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#define CD_FLAG_GDROM   0x00000001  /* disc is a GD-ROM, all tracks should be stored with GD-ROM metadata */

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#define CD_FLAG_GDROMLE 0x00000002  /* legacy GD-ROM, with little-endian CDDA data */

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

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    FUNCTION PROTOTYPES

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

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/* ECC utilities */

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int ecc_verify(const uint8_t *sector);

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void ecc_generate(uint8_t *sector);

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void ecc_clear(uint8_t *sector);

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

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    INLINE FUNCTIONS

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

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static inline uint32_t msf_to_lba(uint32_t msf)

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{

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	return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0);

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}

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static inline uint32_t lba_to_msf(uint32_t lba)

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{

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	uint8_t m, s, f;

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	m = lba / (60 * 75);

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	lba -= m * (60 * 75);

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	s = lba / 75;

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	f = lba % 75;

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	return ((m / 10) << 20) | ((m % 10) << 16) |

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			((s / 10) << 12) | ((s % 10) <<  8) |

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			((f / 10) <<  4) | ((f % 10) <<  0);

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}

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/**

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 * segacd needs it like this.. investigate

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 * Angelo also says PCE tracks often start playing at the

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 * wrong address.. related?

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 **/

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static inline uint32_t lba_to_msf_alt(int lba)

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{

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	uint32_t ret = 0;

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	ret |= ((lba / (60 * 75))&0xff)<<16;

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	ret |= (((lba / 75) % 60)&0xff)<<8;

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	ret |= ((lba % 75)&0xff)<<0;

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	return ret;

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}

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#endif  /* __CDROM_H__ */

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