lxdream 0.9.1| filename | src/gdrom/gdi.c |
| changeset | 1023:264e2fd90be8 |
| prev | 836:d314bf370949 |
| author | nkeynes |
| date | Mon Jun 08 04:12:21 2009 +0000 (14 years ago) |
| permissions | -rw-r--r-- |
| last change | General cleanup of the GD-rom subsystem - merge gdrom_image_t and gdrom_disc_t - Abstract MMC devices using a lower-level scsi transport - OSX: only look at the whole disc device, and ignore partitions |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * NullDC GDI image format
5 *
6 * Copyright (c) 2005 Nathan Keynes.
7 *
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.
12 *
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.
17 */
19 #include <stdlib.h>
20 #include <stdio.h>
21 #include <stdint.h>
22 #include <string.h>
23 #include <fcntl.h>
24 #include <errno.h>
25 #include <sys/stat.h>
26 #include <glib/gutils.h>
27 #include "gdrom/gddriver.h"
30 static gboolean gdi_image_is_valid( FILE *f );
31 static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f );
33 struct gdrom_image_class gdi_image_class = { "NullDC GD-Rom Image", "gdi",
34 gdi_image_is_valid, gdi_image_open };
36 static gboolean gdi_image_is_valid( FILE *f )
37 {
38 char line[512];
39 uint32_t track_count;
41 fseek(f, 0, SEEK_SET);
42 if( fgets( line, sizeof(line), f ) == NULL ) {
43 return FALSE;
44 }
45 track_count = strtoul(line, NULL, 0);
46 if( track_count == 0 || track_count > 99 ) {
47 return FALSE;
48 }
49 return TRUE;
50 }
52 static gdrom_disc_t gdi_image_open( const gchar *filename, FILE *f )
53 {
54 int i;
55 uint32_t track_count;
56 gdrom_disc_t disc;
57 struct stat st;
58 char line[512];
59 int session = 0;
60 gchar *dirname;
62 fseek(f, 0, SEEK_SET);
64 if( fgets( line, sizeof(line), f ) == NULL ) {
65 return FALSE;
66 }
67 track_count = strtoul(line, NULL, 0);
68 if( track_count == 0 || track_count > 99 ) {
69 return NULL;
70 }
72 disc = gdrom_image_new(filename, f);
73 if( disc == NULL ) {
74 ERROR("Unable to allocate memory!");
75 return NULL;
76 }
77 dirname = g_path_get_dirname(filename);
78 disc->disc_type = IDE_DISC_GDROM;
79 disc->track_count = track_count;
80 for( i=0; i<track_count; i++ ) {
81 int track_no, start_lba, flags, size, offset;
82 char filename[256];
84 if( fgets( line, sizeof(line), f ) == NULL ) {
85 disc->destroy(disc,FALSE);
86 return NULL;
87 }
88 sscanf( line, "%d %d %d %d %s %d", &track_no, &start_lba, &flags, &size,
89 filename, &offset );
90 if( start_lba >= 45000 ) {
91 session = 1;
92 }
93 disc->track[i].session = session;
94 disc->track[i].lba = start_lba + 150; // 2-second offset
95 disc->track[i].flags = (flags & 0x0F)<<4;
96 disc->track[i].sector_size = size;
97 if( strcasecmp( filename, "none" ) == 0 ) {
98 disc->track[i].file = NULL;
99 disc->track[i].sector_count = 0;
100 disc->track[i].mode = GDROM_MODE1;
101 } else {
102 gchar *pathname = g_strdup_printf( "%s%c%s", dirname, G_DIR_SEPARATOR, filename );
103 disc->track[i].file = fopen( pathname, "ro" );
104 g_free(pathname);
105 if( disc->track[i].file == NULL ) {
106 disc->destroy(disc,FALSE);
107 g_free(dirname);
108 return NULL;
109 }
110 fstat( fileno(disc->track[i].file), &st );
111 disc->track[i].sector_count = st.st_size / size;
112 if( disc->track[i].flags & TRACK_DATA ) {
113 /* Data track */
114 switch(size) {
115 case 2048: disc->track[i].mode = GDROM_MODE1; break;
116 case 2336: disc->track[i].mode = GDROM_SEMIRAW_MODE2; break;
117 case 2352: disc->track[i].mode = GDROM_RAW_XA; break;
118 default:
119 disc->destroy(disc,FALSE);
120 g_free(dirname);
121 return NULL;
122 }
123 } else {
124 /* Audio track */
125 disc->track[i].mode = GDROM_CDDA;
126 if( size != 2352 ) {
127 disc->destroy(disc,FALSE);
128 g_free(dirname);
129 return NULL;
130 }
131 }
132 }
133 disc->track[i].offset = offset;
134 }
135 g_free(dirname);
136 return disc;
137 }
.