2 * $Id: nrg.c,v 1.3 2006-06-26 10:30:42 nkeynes Exp $
4 * Nero (NRG) CD file format. File information stolen shamelessly from
7 * Copyright (c) 2005 Nathan Keynes.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
23 #include "gdrom/gdrom.h"
26 static gboolean nrg_image_is_valid( FILE *f );
27 static gdrom_disc_t nrg_image_open( const gchar *filename, FILE *f );
29 struct gdrom_image_class nrg_image_class = { "Nero", "nrg",
30 nrg_image_is_valid, nrg_image_open };
32 #define NERO_V55_ID 0x4e455235
33 #define NERO_V50_ID 0x4e45524f
35 /* Courtesy of libcdio */
37 #define NERO_ID 0x4e45524f /* Nero pre 5.5.x */
38 #define CUES_ID 0x43554553 /* Nero pre version 5.5.x-6.x */
39 #define DAOI_ID 0x44414f49
40 #define ETNF_ID 0x45544e46
41 #define SINF_ID 0x53494e46 /* Session information */
42 #define END_ID 0x454e4421
44 #define NER5_ID 0x4e455235 /* Nero version 5.5.x */
45 #define CDTX_ID 0x43445458 /* CD TEXT */
46 #define CUEX_ID 0x43554558 /* Nero version 5.5.x-6.x */
47 #define DAOX_ID 0x44414f58 /* Nero version 5.5.x-6.x */
48 #define ETN2_ID 0x45544e32
49 #define MTYP_ID 0x4d545950 /* Disc Media type? */
53 struct nrg_footer_v50 {
58 struct nrg_footer_v55 {
89 uint8_t unknown[2]; /* always 01 01? */
91 struct nrg_daoi_track {
93 uint32_t sector_size __attribute__((packed)); /* Always 0? */
95 uint8_t unknown2[3]; /* Always 00 00 01? */
96 uint32_t pregap __attribute__((packed));
97 uint32_t offset __attribute__((packed));
98 uint32_t end __attribute__((packed));
100 } __attribute__((packed));
103 * Convert an 8-bit BCD number to normal integer form.
106 uint8_t static bcd_to_uint8( uint8_t bcd )
108 return (bcd & 0x0F) + (((bcd & 0xF0)>>4)*10);
113 * Convert a 32 bit MSF address (BCD coded) to the
114 * equivalent LBA form.
117 uint32_t static msf_to_lba( uint32_t msf )
120 int f = bcd_to_uint8(msf);
121 int s = bcd_to_uint8(msf>>8);
122 int m = bcd_to_uint8(msf>>16);
123 return (m * 60 + s) * 75 + f;
127 uint32_t static nrg_track_mode( uint8_t mode )
130 case 0: return GDROM_MODE1;
131 case 2: return GDROM_MODE2_XA1;
132 case 3: return GDROM_MODE2;
133 case 7: return GDROM_CDDA;
135 ERROR( "Unrecognized track mode %d in Nero image", mode );
140 static gboolean nrg_image_is_valid( FILE *f )
142 union nrg_footer footer;
144 fseek( f, -12, SEEK_END );
145 fread( &footer, sizeof(footer), 1, f );
146 if( ntohl(footer.v50.id) == NERO_V50_ID ) {
153 static gdrom_disc_t nrg_image_open( const gchar *filename, FILE *f )
155 union nrg_footer footer;
156 struct nrg_chunk chunk;
157 struct nrg_daoi *dao;
159 gboolean end = FALSE;
161 int session_track_id = 0;
163 int cue_track_id = 0, cue_track_count = 0;
166 fseek( f, -12, SEEK_END );
167 fread( &footer, sizeof(footer), 1, f );
168 if( ntohl(footer.v50.id) == NERO_V50_ID ) {
169 INFO( "Loading Nero 5.0 image" );
170 fseek( f, ntohl(footer.v50.offset), SEEK_SET );
171 } else if( ntohl(footer.v55.id) == NERO_V55_ID ) {
172 INFO( "Loading Nero 5.5+ image" );
173 fseek( f, ntohl(footer.v55.offset), SEEK_SET );
175 /* Not a (recognized) Nero image */
179 disc = gdrom_image_new(f);
181 ERROR("Unable to allocate memory!");
186 fread( &chunk, sizeof(chunk), 1, f );
187 chunk.length = ntohl(chunk.length);
188 char data[chunk.length];
189 fread( data, chunk.length, 1, f );
190 switch( ntohl(chunk.id) ) {
192 cue_track_id = track_id;
193 cue_track_count = ((chunk.length / sizeof(struct nrg_cues)) >> 1) - 1;
194 track_id += cue_track_count;
195 for( i=0; i<chunk.length; i+= sizeof(struct nrg_cues) ) {
196 struct nrg_cues *cue = (struct nrg_cues *)(data+i);
198 if( cue->track == 0 )
199 continue; /* Track 0. Leadin? always 0? */
200 if( cue->track == 0xAA ) { /* end of disc */
201 disc->track[track_id-1].sector_count =
202 msf_to_lba( cue->addr ) - disc->track[track_id-1].lba;
204 track = cue_track_id + bcd_to_uint8(cue->track) - 1;
205 if( (cue->control & 0x01) == 0 ) {
206 /* Pre-gap address. */
208 disc->track[track-1].sector_count =
209 msf_to_lba( cue->addr ) - disc->track[track-1].lba;
211 } else { /* Track-start address */
212 disc->track[track].lba = msf_to_lba( cue->addr );
213 disc->track[track].flags = cue->type;
219 dao = (struct nrg_daoi *)data;
220 memcpy( disc->mcn, dao->mcn, 13 );
221 disc->mcn[13] = '\0';
222 assert( dao->track_count * 30 + 22 == chunk.length );
223 assert( dao->track_count == cue_track_count );
224 for( i=0; i<dao->track_count; i++ ) {
225 disc->track[cue_track_id].sector_size = ntohl(dao->track[i].sector_size);
226 disc->track[cue_track_id].offset = ntohl(dao->track[i].offset);
227 disc->track[cue_track_id].mode = nrg_track_mode( dao->track[i].mode );
228 assert( disc->track[cue_track_id].sector_count ==
229 (ntohl(dao->track[i].end) - ntohl(dao->track[i].offset))/
230 ntohl(dao->track[i].sector_size) );
235 /* Data is a single 32-bit number representing number of tracks in session */
236 i = ntohl( *(uint32_t *)data );
238 disc->track[session_track_id++].session = session_id;
242 for( i=0; i < chunk.length; i+= 0x14 ) {
243 struct nrg_etnf *etnf = (struct nrg_etnf *)(data+i);
244 disc->track[track_id].offset = ntohl(etnf->offset);
245 disc->track[track_id].lba = ntohl(etnf->lba) + (i+1)*GDROM_PREGAP;
246 disc->track[track_id].mode = nrg_track_mode( ntohl(etnf->mode) );
247 if( disc->track[track_id].mode == -1 ) {
251 if( disc->track[track_id].mode == GDROM_CDDA )
252 disc->track[track_id].flags = 0x01;
254 disc->track[track_id].flags = 0x01 | TRACK_DATA;
255 disc->track[track_id].sector_size = GDROM_SECTOR_SIZE(disc->track[track_id].mode);
256 disc->track[track_id].sector_count = ntohl(etnf->length) /
257 disc->track[track_id].sector_size;
266 disc->track_count = track_id;
270 gboolean nrg_read_sectors( struct gdrom_disc *disc, uint32_t lba, uint32_t count, char *buf )
.