lxdream 0.9.1| filename | src/gdrom/nrg.c |
| changeset | 1075:1a21750d300c |
| prev | 1030:864417a57662 |
| author | nkeynes |
| date | Fri Jul 31 13:45:32 2009 +1000 (14 years ago) |
| permissions | -rw-r--r-- |
| last change | Remove or change the level of a bunch of INFO messages that shouldn't really be INFO level |
| view | annotate | diff | log | raw |
1 /**
2 * $Id$
3 *
4 * Nero (NRG) CD file format. File information stolen shamelessly from
5 * libcdio.
6 *
7 * Copyright (c) 2005 Nathan Keynes.
8 *
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.
13 *
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.
18 */
20 #include <assert.h>
21 #include <stdio.h>
22 #include <errno.h>
23 #include <glib/gtypes.h>
24 #include "gdrom/gddriver.h"
25 #include "dream.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 */
37 /* 5.0 or earlier */
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
44 /* 5.5+ only */
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? */
53 union nrg_footer {
54 struct nrg_footer_v50 {
55 uint32_t dummy;
56 uint32_t id;
57 uint32_t offset;
58 } v50;
59 struct nrg_footer_v55 {
60 uint32_t id;
61 uint64_t offset;
62 } v55;
63 };
65 struct nrg_chunk {
66 uint32_t id;
67 uint32_t length;
68 };
70 struct nrg_etnf {
71 uint32_t offset;
72 uint32_t length;
73 uint32_t mode;
74 uint32_t lba;
75 uint32_t padding;
76 };
78 struct nrg_etn2 {
79 uint64_t offset;
80 uint64_t length;
81 uint32_t mode;
82 uint32_t lba;
83 uint64_t padding;
84 };
86 struct nrg_cues {
87 uint8_t type;
88 uint8_t track;
89 uint8_t control;
90 uint8_t pad;
91 uint32_t addr;
92 };
94 struct nrg_daoi {
95 uint32_t length;
96 char mcn[14];
97 uint8_t disc_mode;
98 uint8_t unknown[2]; /* always 01 01? */
99 uint8_t track_count;
100 struct nrg_daoi_track {
101 char unknown[10];
102 uint32_t sector_size __attribute__((packed)); /* Always 0? */
103 uint8_t mode;
104 uint8_t unknown2[3]; /* Always 00 00 01? */
105 uint32_t pregap __attribute__((packed));
106 uint32_t offset __attribute__((packed));
107 uint32_t end __attribute__((packed));
108 } track[0];
109 } __attribute__((packed));
111 struct nrg_daox {
112 uint32_t length;
113 char mcn[14];
114 uint8_t disc_mode;
115 uint8_t unknown[2]; /* always 01 01? */
116 uint8_t track_count;
117 struct nrg_daox_track {
118 char unknown[10];
119 uint32_t sector_size __attribute__((packed)); /* Always 0? */
120 uint8_t mode;
121 uint8_t unknown2[3]; /* Always 00 00 01? */
122 uint64_t pregap __attribute__((packed));
123 uint64_t offset __attribute__((packed));
124 uint64_t end __attribute__((packed));
125 } track[0];
126 } __attribute__((packed));
128 /**
129 * Convert an 8-bit BCD number to normal integer form.
130 * Eg, 0x79 => 79
131 */
132 uint8_t static bcd_to_uint8( uint8_t bcd )
133 {
134 return (bcd & 0x0F) + (((bcd & 0xF0)>>4)*10);
135 }
138 /**
139 * Convert a 32 bit MSF address (BCD coded) to the
140 * equivalent LBA form.
141 * Eg, 0x
142 */
143 uint32_t static msf_to_lba( uint32_t msf )
144 {
145 msf = GUINT32_FROM_BE(msf);
146 int f = bcd_to_uint8(msf);
147 int s = bcd_to_uint8(msf>>8);
148 int m = bcd_to_uint8(msf>>16);
149 return (m * 60 + s) * 75 + f;
151 }
153 uint32_t static nrg_track_mode( uint8_t mode )
154 {
155 switch( mode ) {
156 case 0: return GDROM_MODE1;
157 case 2: return GDROM_MODE2_FORM1;
158 case 3: return GDROM_SEMIRAW_MODE2;
159 case 7: return GDROM_CDDA;
160 default:
161 ERROR( "Unrecognized track mode %d in Nero image", mode );
162 return -1;
163 }
164 }
166 static gboolean nrg_image_is_valid( FILE *f )
167 {
168 union nrg_footer footer;
170 fseek( f, -12, SEEK_END );
171 fread( &footer, sizeof(footer), 1, f );
172 if( GUINT32_FROM_BE(footer.v50.id) == NERO_V50_ID ||
173 GUINT32_FROM_BE(footer.v55.id) == NERO_V55_ID ) {
174 return TRUE;
175 } else {
176 return FALSE;
177 }
178 }
180 static gdrom_disc_t nrg_image_open( const gchar *filename, FILE *f )
181 {
182 union nrg_footer footer;
183 struct nrg_chunk chunk;
184 struct nrg_daoi *dao;
185 struct nrg_daox *daox;
186 struct nrg_etnf *etnf;
187 struct nrg_etn2 *etn2;
188 gdrom_disc_t disc;
189 gboolean end = FALSE;
190 uint32_t chunk_id;
191 int session_id = 0;
192 int session_track_id = 0;
193 int track_id = 0;
194 int cue_track_id = 0, cue_track_count = 0;
195 int i, count;
197 fseek( f, -12, SEEK_END );
198 fread( &footer, sizeof(footer), 1, f );
199 if( GUINT32_FROM_BE(footer.v50.id) == NERO_V50_ID ) {
200 fseek( f, GUINT32_FROM_BE(footer.v50.offset), SEEK_SET );
201 } else if( GUINT32_FROM_BE(footer.v55.id) == NERO_V55_ID ) {
202 fseek( f, (uint32_t)GUINT64_FROM_BE(footer.v55.offset), SEEK_SET );
203 } else {
204 /* Not a (recognized) Nero image */
205 return NULL;
206 }
208 disc = gdrom_image_new(filename, f);
209 if( disc == NULL ) {
210 ERROR("Unable to allocate memory!");
211 return NULL;
212 }
214 do {
215 fread( &chunk, sizeof(chunk), 1, f );
216 chunk.length = GUINT32_FROM_BE(chunk.length);
217 char data[chunk.length];
218 fread( data, chunk.length, 1, f );
219 chunk_id = GUINT32_FROM_BE(chunk.id);
220 switch( chunk_id ) {
221 case CUES_ID:
222 case CUEX_ID:
223 cue_track_id = track_id;
224 cue_track_count = ((chunk.length / sizeof(struct nrg_cues)) >> 1) - 1;
225 track_id += cue_track_count;
226 for( i=0; i<chunk.length; i+= sizeof(struct nrg_cues) ) {
227 struct nrg_cues *cue = (struct nrg_cues *)(data+i);
228 int track = 0;
229 uint32_t lba;
230 if( chunk_id == CUEX_ID ) {
231 lba = GUINT32_FROM_BE( cue->addr ) + GDROM_PREGAP;
232 } else {
233 lba = msf_to_lba( cue->addr );
234 }
235 if( cue->track == 0 )
236 continue; /* Track 0. Leadin? always 0? */
237 if( cue->track == 0xAA ) { /* end of disc */
238 disc->track[track_id-1].sector_count =
239 lba - disc->track[track_id-1].lba;
240 } else {
241 track = bcd_to_uint8(cue->track) - 1;
242 if( (cue->control & 0x01) == 0 ) {
243 /* Pre-gap address. */
244 if( track != 0 ) {
245 disc->track[track-1].sector_count =
246 lba - disc->track[track-1].lba;
247 }
248 } else { /* Track-start address */
249 disc->track[track].lba = lba;
250 disc->track[track].flags = cue->type;
251 }
252 }
253 }
254 break;
255 case DAOI_ID:
256 dao = (struct nrg_daoi *)data;
257 memcpy( disc->mcn, dao->mcn, 13 );
258 disc->mcn[13] = '\0';
259 assert( (dao->track_count - cue_track_id) * 30 + 22 == chunk.length );
260 assert( dao->track_count == track_id );
261 for( i=0; i<(dao->track_count-cue_track_id); i++ ) {
262 disc->track[cue_track_id].sector_size = GUINT32_FROM_BE(dao->track[i].sector_size);
263 disc->track[cue_track_id].offset = GUINT32_FROM_BE(dao->track[i].offset);
264 disc->track[cue_track_id].mode = nrg_track_mode( dao->track[i].mode );
265 disc->track[cue_track_id].sector_count =
266 (GUINT32_FROM_BE(dao->track[i].end) - GUINT32_FROM_BE(dao->track[i].offset))/
267 GUINT32_FROM_BE(dao->track[i].sector_size);
268 cue_track_id++;
269 }
270 break;
271 case DAOX_ID:
272 daox = (struct nrg_daox *)data;
273 memcpy( disc->mcn, daox->mcn, 13 );
274 disc->mcn[13] = '\0';
275 assert( (daox->track_count - cue_track_id) * 42 + 22 == chunk.length );
276 assert( daox->track_count == track_id );
277 for( i=0; i<(daox->track_count-cue_track_id); i++ ) {
278 disc->track[cue_track_id].sector_size = GUINT32_FROM_BE(daox->track[i].sector_size);
279 disc->track[cue_track_id].offset = GUINT64_FROM_BE(daox->track[i].offset);
280 disc->track[cue_track_id].mode = nrg_track_mode( daox->track[i].mode );
281 disc->track[cue_track_id].sector_count =
282 (GUINT64_FROM_BE(daox->track[i].end) - GUINT64_FROM_BE(daox->track[i].offset))/
283 GUINT32_FROM_BE(daox->track[i].sector_size);
284 cue_track_id++;
285 }
286 break;
288 case SINF_ID:
289 /* Data is a single 32-bit number representing number of tracks in session */
290 i = GUINT32_FROM_BE( *(uint32_t *)data );
291 while( i-- > 0 )
292 disc->track[session_track_id++].session = session_id;
293 session_id++;
294 break;
295 case ETNF_ID:
296 etnf = (struct nrg_etnf *)data;
297 count = chunk.length / sizeof(struct nrg_etnf);
298 for( i=0; i < count; i++, etnf++ ) {
299 disc->track[track_id].offset = GUINT32_FROM_BE(etnf->offset);
300 disc->track[track_id].lba = GUINT32_FROM_BE(etnf->lba) + (i+1)*GDROM_PREGAP;
301 disc->track[track_id].mode = nrg_track_mode( GUINT32_FROM_BE(etnf->mode) );
302 if( disc->track[track_id].mode == -1 ) {
303 disc->destroy(disc,FALSE);
304 return NULL;
305 }
306 if( disc->track[track_id].mode == GDROM_CDDA )
307 disc->track[track_id].flags = 0x01;
308 else
309 disc->track[track_id].flags = 0x01 | TRACK_DATA;
310 disc->track[track_id].sector_size = GDROM_SECTOR_SIZE(disc->track[track_id].mode);
311 disc->track[track_id].sector_count = GUINT32_FROM_BE(etnf->length) /
312 disc->track[track_id].sector_size;
313 track_id++;
314 }
315 break;
316 case ETN2_ID:
317 etn2 = (struct nrg_etn2 *)data;
318 count = chunk.length / sizeof(struct nrg_etn2);
319 for( i=0; i < count; i++, etn2++ ) {
320 disc->track[track_id].offset = (uint32_t)GUINT64_FROM_BE(etn2->offset);
321 disc->track[track_id].lba = GUINT32_FROM_BE(etn2->lba) + (i+1)*GDROM_PREGAP;
322 disc->track[track_id].mode = nrg_track_mode( GUINT32_FROM_BE(etn2->mode) );
323 if( disc->track[track_id].mode == -1 ) {
324 disc->destroy(disc,FALSE);
325 return NULL;
326 }
327 if( disc->track[track_id].mode == GDROM_CDDA )
328 disc->track[track_id].flags = 0x01;
329 else
330 disc->track[track_id].flags = 0x01 | TRACK_DATA;
331 disc->track[track_id].sector_size = GDROM_SECTOR_SIZE(disc->track[track_id].mode);
332 disc->track[track_id].sector_count = (uint32_t)(GUINT64_FROM_BE(etn2->length) /
333 disc->track[track_id].sector_size);
334 track_id++;
335 }
336 break;
338 case END_ID:
339 end = TRUE;
340 break;
341 }
342 } while( !end );
343 disc->track_count = track_id;
344 gdrom_set_disc_type(disc);
345 return disc;
346 }
.