nkeynes@125 | 1 | /**
|
nkeynes@245 | 2 | * $Id: gdrom.h,v 1.9 2006-12-19 09:52:56 nkeynes Exp $
|
nkeynes@125 | 3 | *
|
nkeynes@125 | 4 | * This file defines the structures and functions used by the GD-Rom
|
nkeynes@125 | 5 | * disc driver. (ie, the modules that supply a CD image to be used by the
|
nkeynes@125 | 6 | * system).
|
nkeynes@125 | 7 | *
|
nkeynes@125 | 8 | * Copyright (c) 2005 Nathan Keynes.
|
nkeynes@125 | 9 | *
|
nkeynes@125 | 10 | * This program is free software; you can redistribute it and/or modify
|
nkeynes@125 | 11 | * it under the terms of the GNU General Public License as published by
|
nkeynes@125 | 12 | * the Free Software Foundation; either version 2 of the License, or
|
nkeynes@125 | 13 | * (at your option) any later version.
|
nkeynes@125 | 14 | *
|
nkeynes@125 | 15 | * This program is distributed in the hope that it will be useful,
|
nkeynes@125 | 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
nkeynes@125 | 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
nkeynes@125 | 18 | * GNU General Public License for more details.
|
nkeynes@125 | 19 | */
|
nkeynes@125 | 20 |
|
nkeynes@125 | 21 | #ifndef dream_gdrom_H
|
nkeynes@125 | 22 | #define dream_gdrom_H 1
|
nkeynes@125 | 23 |
|
nkeynes@125 | 24 | #include "dream.h"
|
nkeynes@125 | 25 |
|
nkeynes@149 | 26 | typedef uint16_t gdrom_error_t;
|
nkeynes@149 | 27 |
|
nkeynes@138 | 28 | struct gdrom_toc {
|
nkeynes@142 | 29 | uint32_t track[99];
|
nkeynes@125 | 30 | uint32_t first, last, leadout;
|
nkeynes@138 | 31 | };
|
nkeynes@138 | 32 |
|
nkeynes@138 | 33 | #define GDROM_PREGAP 150 /* Sectors */
|
nkeynes@138 | 34 |
|
nkeynes@138 | 35 | extern uint32_t gdrom_sector_size[];
|
nkeynes@138 | 36 | #define GDROM_SECTOR_SIZE(x) gdrom_sector_size[x]
|
nkeynes@138 | 37 | typedef enum {
|
nkeynes@138 | 38 | GDROM_MODE1,
|
nkeynes@138 | 39 | GDROM_MODE2,
|
nkeynes@138 | 40 | GDROM_MODE2_XA1,
|
nkeynes@138 | 41 | GDROM_MODE2_XA2,
|
nkeynes@138 | 42 | GDROM_CDDA,
|
nkeynes@143 | 43 | GDROM_GD,
|
nkeynes@143 | 44 | GDROM_RAW
|
nkeynes@138 | 45 | } gdrom_track_mode_t;
|
nkeynes@138 | 46 |
|
nkeynes@138 | 47 | /* The disc register indicates the current contents of the drive. When open
|
nkeynes@138 | 48 | * contains 0x06.
|
nkeynes@138 | 49 | */
|
nkeynes@138 | 50 | #define IDE_DISC_AUDIO 0x00
|
nkeynes@138 | 51 | #define IDE_DISC_NONE 0x06
|
nkeynes@138 | 52 | #define IDE_DISC_CDROM 0x20
|
nkeynes@138 | 53 | #define IDE_DISC_GDROM 0x80
|
nkeynes@138 | 54 | #define IDE_DISC_READY 0x01 /* ored with above */
|
nkeynes@138 | 55 | #define IDE_DISC_IDLE 0x02 /* ie spun-down */
|
nkeynes@138 | 56 |
|
nkeynes@142 | 57 | #define TRACK_PRE_EMPHASIS 0x10
|
nkeynes@142 | 58 | #define TRACK_COPY_PERMITTED 0x20
|
nkeynes@142 | 59 | #define TRACK_DATA 0x40
|
nkeynes@142 | 60 | #define TRACK_FOUR_CHANNEL 0x80
|
nkeynes@142 | 61 |
|
nkeynes@245 | 62 | typedef struct gdrom_track {
|
nkeynes@138 | 63 | gdrom_track_mode_t mode;
|
nkeynes@142 | 64 | uint8_t flags; /* Track flags */
|
nkeynes@138 | 65 | int session; /* session # containing this track */
|
nkeynes@138 | 66 | uint32_t lba; /* start sector address */
|
nkeynes@138 | 67 | uint32_t sector_size; /* For convenience, determined by mode */
|
nkeynes@138 | 68 | uint32_t sector_count;
|
nkeynes@138 | 69 | uint32_t offset; /* File offset of start of track - image files only */
|
nkeynes@245 | 70 | } *gdrom_track_t;
|
nkeynes@125 | 71 |
|
nkeynes@125 | 72 |
|
nkeynes@125 | 73 | typedef struct gdrom_disc {
|
nkeynes@138 | 74 | int disc_type;
|
nkeynes@138 | 75 | int track_count;
|
nkeynes@138 | 76 | struct gdrom_track track[99];
|
nkeynes@138 | 77 | gchar mcn[14]; /* Media catalogue number */
|
nkeynes@138 | 78 | const gchar *filename; /* Image filename */
|
nkeynes@138 | 79 | FILE *file; /* Stream, for image files */
|
nkeynes@152 | 80 | gdrom_error_t (*read_sectors)( struct gdrom_disc *disc,
|
nkeynes@138 | 81 | uint32_t lba, uint32_t sector_count,
|
nkeynes@143 | 82 | int mode, char *buf, uint32_t *length );
|
nkeynes@138 | 83 | void (*close)( struct gdrom_disc *disc );
|
nkeynes@125 | 84 | } *gdrom_disc_t;
|
nkeynes@125 | 85 |
|
nkeynes@138 | 86 | /**
|
nkeynes@168 | 87 | *
|
nkeynes@168 | 88 | */
|
nkeynes@168 | 89 | typedef struct gdrom_image_class {
|
nkeynes@168 | 90 | const gchar *name;
|
nkeynes@168 | 91 | const gchar *extension;
|
nkeynes@168 | 92 | gboolean (*is_valid_file)(FILE *f);
|
nkeynes@168 | 93 | gdrom_disc_t (*open_image_file)(const gchar *filename, FILE *f);
|
nkeynes@168 | 94 | } *gdrom_image_class_t;
|
nkeynes@168 | 95 |
|
nkeynes@168 | 96 | extern struct gdrom_image_class nrg_image_class;
|
nkeynes@168 | 97 | extern struct gdrom_image_class cdi_image_class;
|
nkeynes@237 | 98 | extern struct gdrom_image_class linux_device_class;
|
nkeynes@168 | 99 |
|
nkeynes@168 | 100 | /**
|
nkeynes@138 | 101 | * Construct a new image file using the default methods.
|
nkeynes@138 | 102 | */
|
nkeynes@138 | 103 | gdrom_disc_t gdrom_image_new( FILE *file );
|
nkeynes@125 | 104 |
|
nkeynes@138 | 105 | /**
|
nkeynes@138 | 106 | * Open an image file
|
nkeynes@138 | 107 | */
|
nkeynes@138 | 108 | gdrom_disc_t gdrom_image_open( const gchar *filename );
|
nkeynes@138 | 109 |
|
nkeynes@138 | 110 | /**
|
nkeynes@138 | 111 | * Retrieve the disc table of contents, and write it into the buffer in the
|
nkeynes@138 | 112 | * format expected by the DC.
|
nkeynes@149 | 113 | * @return 0 on success, error code on failure (eg no disc mounted)
|
nkeynes@138 | 114 | */
|
nkeynes@149 | 115 | gdrom_error_t gdrom_get_toc( char *buf );
|
nkeynes@149 | 116 |
|
nkeynes@149 | 117 | /**
|
nkeynes@152 | 118 | * Retrieve the short (6-byte) session info, and write it into the buffer.
|
nkeynes@149 | 119 | * @return 0 on success, error code on failure.
|
nkeynes@149 | 120 | */
|
nkeynes@152 | 121 | gdrom_error_t gdrom_get_info( char *buf, int session );
|
nkeynes@138 | 122 |
|
nkeynes@245 | 123 | gdrom_track_t gdrom_get_track( int track_no );
|
nkeynes@245 | 124 |
|
nkeynes@245 | 125 | uint8_t gdrom_get_track_no_by_lba( uint32_t lba );
|
nkeynes@245 | 126 |
|
nkeynes@138 | 127 | /**
|
nkeynes@138 | 128 | * Shortcut to open and mount an image file
|
nkeynes@138 | 129 | */
|
nkeynes@138 | 130 | gdrom_disc_t gdrom_mount_image( const gchar *filename );
|
nkeynes@138 | 131 |
|
nkeynes@138 | 132 | void gdrom_mount_disc( gdrom_disc_t disc );
|
nkeynes@138 | 133 |
|
nkeynes@138 | 134 | void gdrom_unmount_disc( void );
|
nkeynes@138 | 135 |
|
nkeynes@138 | 136 | gboolean gdrom_is_mounted( void );
|
nkeynes@138 | 137 |
|
nkeynes@138 | 138 | uint32_t gdrom_read_sectors( uint32_t sector, uint32_t sector_count,
|
nkeynes@143 | 139 | int mode, char *buf, uint32_t *length );
|
nkeynes@125 | 140 |
|
nkeynes@125 | 141 | #endif
|