2 * $Id: gdrom.c,v 1.1 2006-04-30 01:51:08 nkeynes Exp $
4 * GD-Rom access functions.
6 * Copyright (c) 2005 Nathan Keynes.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
21 #include "gdrom/ide.h"
22 #include "gdrom/gdrom.h"
25 static void gdrom_image_destroy( gdrom_disc_t );
26 static uint32_t gdrom_image_read_sectors( gdrom_disc_t, uint32_t, uint32_t, char * );
29 gdrom_disc_t gdrom_disc = NULL;
31 char *gdrom_mode_names[] = { "Mode1", "Mode2", "XA 1", "XA2", "Audio", "GD-Rom" };
32 uint32_t gdrom_sector_size[] = { 2048, 2336, 2048, 2324, 2352, 2336 };
34 gdrom_disc_t gdrom_image_open( const gchar *filename )
36 return nrg_image_open( filename );
40 gdrom_disc_t gdrom_image_new( FILE *file )
42 struct gdrom_disc *disc = (struct gdrom_disc *)calloc(1, sizeof(struct gdrom_disc));
45 disc->read_sectors = gdrom_image_read_sectors;
46 disc->close = gdrom_image_destroy;
47 disc->disc_type = IDE_DISC_CDROM;
52 static void gdrom_image_destroy( gdrom_disc_t disc )
54 if( disc->file != NULL ) {
61 static uint32_t gdrom_image_read_sectors( gdrom_disc_t disc, uint32_t sector,
62 uint32_t sector_count, char *buf )
64 int i, track = -1, track_offset, read_len;
66 for( i=0; i<disc->track_count; i++ ) {
67 if( disc->track[i].lba <= sector &&
68 disc->track[i].lba + disc->track[i].sector_count <= sector + sector_count ) {
76 track_offset = disc->track[track].sector_size * (sector - disc->track[track].lba);
77 read_len = disc->track[track].sector_size * sector_count;
78 fseek( disc->file, disc->track[track].offset + track_offset, SEEK_SET );
79 fread( buf, disc->track[track].sector_size, sector_count, disc->file );
83 uint32_t gdrom_read_sectors( uint32_t sector, uint32_t sector_count,
86 if( gdrom_disc == NULL )
87 return 0; /* No media */
88 return gdrom_disc->read_sectors( gdrom_disc, sector, sector_count, buf );
92 void gdrom_dump_disc( gdrom_disc_t disc ) {
94 INFO( "Disc ID: %s, %d tracks in %d sessions", disc->mcn, disc->track_count,
95 disc->track[disc->track_count-1].session + 1 );
96 for( i=0; i<disc->track_count; i++ ) {
97 INFO( "Sess %d Trk %d: Start %06X Length %06X, %s",
98 disc->track[i].session+1, i+1, disc->track[i].lba,
99 disc->track[i].sector_count, gdrom_mode_names[disc->track[i].mode] );
103 gboolean gdrom_get_toc( char *buf )
105 if( gdrom_disc == NULL )
110 void gdrom_mount_disc( gdrom_disc_t disc )
112 gdrom_unmount_disc();
114 idereg.disc = disc->disc_type | IDE_DISC_READY;
115 gdrom_dump_disc( disc );
118 gdrom_disc_t gdrom_mount_image( const gchar *filename )
120 gdrom_disc_t disc = gdrom_image_open(filename);
122 gdrom_mount_disc( disc );
126 void gdrom_unmount_disc( )
128 if( gdrom_disc != NULL ) {
129 gdrom_disc->close(gdrom_disc);
132 idereg.disc = IDE_DISC_NONE;
135 gboolean gdrom_is_mounted( void )
137 return gdrom_disc != NULL;
.