4 * CDI CD-image file support
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.
26 #include "gdrom/gddriver.h"
28 #define CDI_V2_ID 0x80000004
29 #define CDI_V3_ID 0x80000005
30 #define CDI_V35_ID 0x80000006
33 static gboolean cdi_image_is_valid( FILE *f );
34 static gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f );
36 struct gdrom_image_class cdi_image_class = { "DiscJuggler", "cdi",
37 cdi_image_is_valid, cdi_image_open };
39 static const char TRACK_START_MARKER[20] = { 0,0,1,0,0,0,255,255,255,255,
40 0,0,1,0,0,0,255,255,255,255 };
41 static const char EXT_MARKER[9] = {0,255,255,255,255,255,255,255,255 };
45 uint32_t header_offset;
48 struct cdi_track_data {
49 uint32_t pregap_length;
55 uint32_t total_length;
59 } __attribute__((packed));
61 gboolean cdi_image_is_valid( FILE *f )
64 struct cdi_trailer trail;
66 fseek( f, -8, SEEK_END );
68 fread( &trail, sizeof(trail), 1, f );
69 if( trail.header_offset >= len ||
70 trail.header_offset == 0 )
72 return trail.cdi_version == CDI_V2_ID || trail.cdi_version == CDI_V3_ID ||
73 trail.cdi_version == CDI_V35_ID;
76 gdrom_disc_t cdi_image_open( const gchar *filename, FILE *f )
78 gdrom_disc_t disc = NULL;
80 uint16_t session_count;
85 struct cdi_trailer trail;
88 fseek( f, -8, SEEK_END );
90 fread( &trail, sizeof(trail), 1, f );
91 if( trail.header_offset >= len ||
92 trail.header_offset == 0 )
95 if( trail.cdi_version != CDI_V2_ID && trail.cdi_version != CDI_V3_ID &&
96 trail.cdi_version != CDI_V35_ID ) {
100 if( trail.cdi_version == CDI_V35_ID ) {
101 fseek( f, -(long)trail.header_offset, SEEK_END );
103 fseek( f, trail.header_offset, SEEK_SET );
105 fread( &session_count, sizeof(session_count), 1, f );
107 disc = gdrom_image_new(filename, f);
109 ERROR("Unable to allocate memory!");
113 for( i=0; i< session_count; i++ ) {
114 fread( &track_count, sizeof(track_count), 1, f );
115 if( track_count + total_tracks > 99 ) {
116 ERROR( "Invalid number of tracks, bad cdi image\n" );
117 disc->destroy(disc,FALSE);
120 for( j=0; j<track_count; j++ ) {
121 struct cdi_track_data trk;
122 uint32_t new_fmt = 0;
123 uint8_t fnamelen = 0;
124 fread( &new_fmt, sizeof(new_fmt), 1, f );
125 if( new_fmt != 0 ) { /* Additional data 3.00.780+ ?? */
126 fseek( f, 8, SEEK_CUR ); /* Skip */
128 fread( marker, 20, 1, f );
129 if( memcmp( marker, TRACK_START_MARKER, 20) != 0 ) {
130 ERROR( "Track start marker not found, error reading cdi image\n" );
131 disc->destroy(disc,FALSE);
134 fseek( f, 4, SEEK_CUR );
135 fread( &fnamelen, 1, 1, f );
136 fseek( f, (int)fnamelen, SEEK_CUR ); /* skip over the filename */
137 fseek( f, 19, SEEK_CUR );
138 fread( &new_fmt, sizeof(new_fmt), 1, f );
139 if( new_fmt == 0x80000000 ) {
140 fseek( f, 10, SEEK_CUR );
142 fseek( f, 2, SEEK_CUR );
144 fread( &trk, sizeof(trk), 1, f );
145 disc->track[total_tracks].session = i;
146 disc->track[total_tracks].lba = trk.start_lba + 150;
147 disc->track[total_tracks].sector_count = trk.length;
150 disc->track[total_tracks].mode = GDROM_CDDA;
151 disc->track[total_tracks].sector_size = 2352;
152 disc->track[total_tracks].flags = 0x01;
153 if( trk.sector_size != 2 ) {
154 ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
155 disc->destroy(disc,FALSE);
160 disc->track[total_tracks].mode = GDROM_MODE1;
161 disc->track[total_tracks].sector_size = 2048;
162 disc->track[total_tracks].flags = 0x41;
163 if( trk.sector_size != 0 ) {
164 ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
165 disc->destroy(disc,FALSE);
170 disc->track[total_tracks].flags = 0x41;
171 switch( trk.sector_size ) {
173 disc->track[total_tracks].mode = GDROM_MODE2_FORM1;
174 disc->track[total_tracks].sector_size = 2048;
177 disc->track[total_tracks].mode = GDROM_SEMIRAW_MODE2;
178 disc->track[total_tracks].sector_size = 2336;
182 ERROR( "Invalid combination of mode %d with size %d", trk.mode, trk.sector_size );
183 disc->destroy(disc,FALSE);
188 ERROR( "Unsupported track mode %d", trk.mode );
189 disc->destroy(disc,FALSE);
192 disc->track[total_tracks].offset = posn +
193 trk.pregap_length * disc->track[total_tracks].sector_size ;
194 posn += trk.total_length * disc->track[total_tracks].sector_size;
196 fread( marker, 1, 9, f );
197 if( memcmp( marker, EXT_MARKER, 9 ) == 0 ) {
198 fseek( f, 79, SEEK_CUR );
200 fseek( f, -9, SEEK_CUR );
203 fseek( f, 12, SEEK_CUR );
205 disc->track_count = total_tracks;
.