2 * $Id: nrg.c,v 1.5 2007-10-06 08:58:00 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 <netinet/in.h>
24 #include "gdrom/gdrom.h"
27 static gboolean nrg_image_is_valid( FILE *f );
28 static gdrom_disc_t nrg_image_open( const gchar *filename, FILE *f );
30 struct gdrom_image_class nrg_image_class = { "Nero", "nrg",
31 nrg_image_is_valid, nrg_image_open };
33 #define NERO_V55_ID 0x4e455235
34 #define NERO_V50_ID 0x4e45524f
36 /* Courtesy of libcdio */
38 #define NERO_ID 0x4e45524f /* Nero pre 5.5.x */
39 #define CUES_ID 0x43554553 /* Nero pre version 5.5.x-6.x */
40 #define DAOI_ID 0x44414f49
41 #define ETNF_ID 0x45544e46
42 #define SINF_ID 0x53494e46 /* Session information */
43 #define END_ID 0x454e4421
45 #define NER5_ID 0x4e455235 /* Nero version 5.5.x */
46 #define CDTX_ID 0x43445458 /* CD TEXT */
47 #define CUEX_ID 0x43554558 /* Nero version 5.5.x-6.x */
48 #define DAOX_ID 0x44414f58 /* Nero version 5.5.x-6.x */
49 #define ETN2_ID 0x45544e32
50 #define MTYP_ID 0x4d545950 /* Disc Media type? */
54 struct nrg_footer_v50 {
59 struct nrg_footer_v55 {
90 uint8_t unknown[2]; /* always 01 01? */
92 struct nrg_daoi_track {
94 uint32_t sector_size __attribute__((packed)); /* Always 0? */
96 uint8_t unknown2[3]; /* Always 00 00 01? */
97 uint32_t pregap __attribute__((packed));
98 uint32_t offset __attribute__((packed));
99 uint32_t end __attribute__((packed));
101 } __attribute__((packed));
104 * Convert an 8-bit BCD number to normal integer form.
107 uint8_t static bcd_to_uint8( uint8_t bcd )
109 return (bcd & 0x0F) + (((bcd & 0xF0)>>4)*10);
114 * Convert a 32 bit MSF address (BCD coded) to the
115 * equivalent LBA form.
118 uint32_t static msf_to_lba( uint32_t msf )
121 int f = bcd_to_uint8(msf);
122 int s = bcd_to_uint8(msf>>8);
123 int m = bcd_to_uint8(msf>>16);
124 return (m * 60 + s) * 75 + f;
128 uint32_t static nrg_track_mode( uint8_t mode )
131 case 0: return GDROM_MODE1;
132 case 2: return GDROM_MODE2_XA1;
133 case 3: return GDROM_MODE2;
134 case 7: return GDROM_CDDA;
136 ERROR( "Unrecognized track mode %d in Nero image", mode );
141 static gboolean nrg_image_is_valid( FILE *f )
143 union nrg_footer footer;
145 fseek( f, -12, SEEK_END );
146 fread( &footer, sizeof(footer), 1, f );
147 if( ntohl(footer.v50.id) == NERO_V50_ID ) {
154 static gdrom_disc_t nrg_image_open( const gchar *filename, FILE *f )
156 union nrg_footer footer;
157 struct nrg_chunk chunk;
158 struct nrg_daoi *dao;
161 gboolean end = FALSE;
163 int session_track_id = 0;
165 int cue_track_id = 0, cue_track_count = 0;
168 fseek( f, -12, SEEK_END );
169 fread( &footer, sizeof(footer), 1, f );
170 if( ntohl(footer.v50.id) == NERO_V50_ID ) {
171 INFO( "Loading Nero 5.0 image" );
172 fseek( f, ntohl(footer.v50.offset), SEEK_SET );
173 } else if( ntohl(footer.v55.id) == NERO_V55_ID ) {
174 INFO( "Loading Nero 5.5+ image" );
175 fseek( f, ntohl(footer.v55.offset), SEEK_SET );
177 /* Not a (recognized) Nero image */
181 disc = gdrom_image_new(f);
184 ERROR("Unable to allocate memory!");
187 image = (gdrom_image_t)disc;
190 fread( &chunk, sizeof(chunk), 1, f );
191 chunk.length = ntohl(chunk.length);
192 char data[chunk.length];
193 fread( data, chunk.length, 1, f );
194 switch( ntohl(chunk.id) ) {
196 cue_track_id = track_id;
197 cue_track_count = ((chunk.length / sizeof(struct nrg_cues)) >> 1) - 1;
198 track_id += cue_track_count;
199 for( i=0; i<chunk.length; i+= sizeof(struct nrg_cues) ) {
200 struct nrg_cues *cue = (struct nrg_cues *)(data+i);
202 if( cue->track == 0 )
203 continue; /* Track 0. Leadin? always 0? */
204 if( cue->track == 0xAA ) { /* end of disc */
205 image->track[track_id-1].sector_count =
206 msf_to_lba( cue->addr ) - image->track[track_id-1].lba;
208 track = cue_track_id + bcd_to_uint8(cue->track) - 1;
209 if( (cue->control & 0x01) == 0 ) {
210 /* Pre-gap address. */
212 image->track[track-1].sector_count =
213 msf_to_lba( cue->addr ) - image->track[track-1].lba;
215 } else { /* Track-start address */
216 image->track[track].lba = msf_to_lba( cue->addr );
217 image->track[track].flags = cue->type;
223 dao = (struct nrg_daoi *)data;
224 memcpy( image->mcn, dao->mcn, 13 );
225 image->mcn[13] = '\0';
226 assert( dao->track_count * 30 + 22 == chunk.length );
227 assert( dao->track_count == cue_track_count );
228 for( i=0; i<dao->track_count; i++ ) {
229 image->track[cue_track_id].sector_size = ntohl(dao->track[i].sector_size);
230 image->track[cue_track_id].offset = ntohl(dao->track[i].offset);
231 image->track[cue_track_id].mode = nrg_track_mode( dao->track[i].mode );
232 image->track[cue_track_id].sector_count =
233 (ntohl(dao->track[i].end) - ntohl(dao->track[i].offset))/
234 ntohl(dao->track[i].sector_size);
239 /* Data is a single 32-bit number representing number of tracks in session */
240 i = ntohl( *(uint32_t *)data );
242 image->track[session_track_id++].session = session_id;
246 for( i=0; i < chunk.length; i+= 0x14 ) {
247 struct nrg_etnf *etnf = (struct nrg_etnf *)(data+i);
248 image->track[track_id].offset = ntohl(etnf->offset);
249 image->track[track_id].lba = ntohl(etnf->lba) + (i+1)*GDROM_PREGAP;
250 image->track[track_id].mode = nrg_track_mode( ntohl(etnf->mode) );
251 if( image->track[track_id].mode == -1 ) {
255 if( image->track[track_id].mode == GDROM_CDDA )
256 image->track[track_id].flags = 0x01;
258 image->track[track_id].flags = 0x01 | TRACK_DATA;
259 image->track[track_id].sector_size = GDROM_SECTOR_SIZE(image->track[track_id].mode);
260 image->track[track_id].sector_count = ntohl(etnf->length) /
261 image->track[track_id].sector_size;
270 image->track_count = track_id;
.