// license:BSD-3-Clause // copyright-holders:Aaron Giles /*************************************************************************** cdrom.h Generic MAME cd-rom implementation ***************************************************************************/ #pragma once #ifndef __CDROM_H__ #define __CDROM_H__ #include "osdcore.h" #include "chd.h" /*************************************************************************** CONSTANTS ***************************************************************************/ // tracks are padded to a multiple of this many frames const UINT32 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 /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ struct cdrom_file; struct cdrom_track_info { /* fields used by CHDMAN and in MAME */ UINT32 trktype; /* track type */ UINT32 subtype; /* subcode data type */ UINT32 datasize; /* size of data in each sector of this track */ UINT32 subsize; /* size of subchannel data in each sector of this track */ UINT32 frames; /* number of frames in this track */ UINT32 extraframes; /* number of "spillage" frames in this track */ UINT32 pregap; /* number of pregap frames */ UINT32 postgap; /* number of postgap frames */ UINT32 pgtype; /* type of sectors in pregap */ UINT32 pgsub; /* type of subchannel data in pregap */ UINT32 pgdatasize; /* size of data in each sector of the pregap */ UINT32 pgsubsize; /* size of subchannel data in each sector of the pregap */ /* fields used in CHDMAN only */ UINT32 padframes; /* number of frames of padding to add to the end of the track; needed for GDI */ /* fields used in MAME/MESS only */ UINT32 logframeofs; /* logical frame of actual track data - offset by pregap size if pregap not physically present */ UINT32 physframeofs; /* physical frame of actual track data in CHD data */ UINT32 chdframeofs; /* frame number this track starts at on the CHD */ }; struct cdrom_toc { UINT32 numtrks; /* number of tracks */ UINT32 flags; /* see FLAG_ above */ cdrom_track_info tracks[CD_MAX_TRACKS]; }; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ /* base functionality */ cdrom_file *cdrom_open(chd_file *chd); void cdrom_close(cdrom_file *file); cdrom_file *cdrom_open(const char *inputfile); /* core read access */ UINT32 cdrom_read_data(cdrom_file *file, UINT32 lbasector, void *buffer, UINT32 datatype, bool phys=false); UINT32 cdrom_read_subcode(cdrom_file *file, UINT32 lbasector, void *buffer, bool phys=false); /* handy utilities */ UINT32 cdrom_get_track(cdrom_file *file, UINT32 frame); UINT32 cdrom_get_track_start(cdrom_file *file, UINT32 track); UINT32 cdrom_get_track_start_phys(cdrom_file *file, UINT32 track); /* TOC utilities */ int cdrom_get_last_track(cdrom_file *file); int cdrom_get_adr_control(cdrom_file *file, int track); int cdrom_get_track_type(cdrom_file *file, int track); const cdrom_toc *cdrom_get_toc(cdrom_file *file); /* extra utilities */ void cdrom_convert_type_string_to_track_info(const char *typestring, cdrom_track_info *info); void cdrom_convert_type_string_to_pregap_info(const char *typestring, cdrom_track_info *info); void cdrom_convert_subtype_string_to_track_info(const char *typestring, cdrom_track_info *info); void cdrom_convert_subtype_string_to_pregap_info(const char *typestring, cdrom_track_info *info); const char *cdrom_get_type_string(UINT32 trktype); const char *cdrom_get_subtype_string(UINT32 subtype); chd_error cdrom_parse_metadata(chd_file *chd, cdrom_toc *toc); chd_error cdrom_write_metadata(chd_file *chd, const cdrom_toc *toc); // ECC utilities bool ecc_verify(const UINT8 *sector); void ecc_generate(UINT8 *sector); void ecc_clear(UINT8 *sector); /*************************************************************************** INLINE FUNCTIONS ***************************************************************************/ INLINE UINT32 msf_to_lba(UINT32 msf) { return ( ((msf&0x00ff0000)>>16) * 60 * 75) + (((msf&0x0000ff00)>>8) * 75) + ((msf&0x000000ff)>>0); } INLINE UINT32 lba_to_msf(UINT32 lba) { UINT8 m, s, f; m = lba / (60 * 75); lba -= m * (60 * 75); s = lba / 75; f = lba % 75; return ((m / 10) << 20) | ((m % 10) << 16) | ((s / 10) << 12) | ((s % 10) << 8) | ((f / 10) << 4) | ((f % 10) << 0); } // segacd needs it like this.. investigate // Angelo also says PCE tracks often start playing at the // wrong address.. related? INLINE UINT32 lba_to_msf_alt(int lba) { UINT32 ret = 0; ret |= ((lba / (60 * 75))&0xff)<<16; ret |= (((lba / 75) % 60)&0xff)<<8; ret |= ((lba % 75)&0xff)<<0; return ret; } #endif // __CDROM_H__