/*************************************************************************** cdrom.h Generic MAME cd-rom implementation Copyright (c) 1996-2007, Nicola Salmoria and the MAME Team. Visit http://mamedev.org for licensing and usage restrictions. ***************************************************************************/ #pragma once #ifndef __CDROM_H__ #define __CDROM_H__ #include "osdcore.h" #include "chd.h" /*************************************************************************** CONSTANTS ***************************************************************************/ #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 (4) #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 */ }; /*************************************************************************** TYPE DEFINITIONS ***************************************************************************/ typedef struct _cdrom_file cdrom_file; typedef struct _cdrom_track_info cdrom_track_info; 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 */ /* fields used in MAME only */ UINT32 physframeofs; /* frame number on the real CD this track starts at */ UINT32 chdframeofs; /* frame number this track starts at on the CHD */ }; typedef struct _cdrom_toc cdrom_toc; struct _cdrom_toc { UINT32 numtrks; /* number of tracks */ cdrom_track_info tracks[CD_MAX_TRACKS]; }; /*************************************************************************** FUNCTION PROTOTYPES ***************************************************************************/ /* base functionality */ cdrom_file *cdrom_open(chd_file *chd); void cdrom_close(cdrom_file *file); /* core read access */ UINT32 cdrom_read_data(cdrom_file *file, UINT32 lbasector, void *buffer, UINT32 datatype); UINT32 cdrom_read_subcode(cdrom_file *file, UINT32 lbasector, void *buffer); /* handy utilities */ UINT32 cdrom_get_track(cdrom_file *file, UINT32 frame); UINT32 cdrom_get_track_start(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_subtype_string_to_track_info(const char *typestring, cdrom_track_info *info); const char *cdrom_get_type_string(const cdrom_track_info *info); const char *cdrom_get_subtype_string(const cdrom_track_info *info); /*************************************************************************** INLINE FUNCTIONS ***************************************************************************/ 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); } #endif // __CDROM_H__