lxdream 0.9.1| filename | src/drivers/cdrom/cd_nrg.c |
| changeset | 1109:700c5ab26a63 |
| prev | 1097:d4807997e450 |
| next | 1178:e55ec927d55d |
| author | nkeynes |
| date | Thu Jun 10 22:13:16 2010 +1000 (13 years ago) |
| permissions | -rw-r--r-- |
| last change | Integrate executable wrapping into the user interface - command-line now loads wrapped by default, -e <bin> to run binary - add support for .bin executables - Add useful (internal) error codes |
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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 "drivers/cdrom/cdimpl.h"
24 #include "dream.h"
26 static gboolean nrg_image_is_valid( FILE *f );
27 static gboolean nrg_image_read_toc( cdrom_disc_t disc, ERROR *err );
29 struct cdrom_disc_factory nrg_disc_factory = { "Nero", "nrg",
30 nrg_image_is_valid, NULL, nrg_image_read_toc };
32 #define NERO_V55_ID 0x4e455235
33 #define NERO_V50_ID 0x4e45524f
35 /* Courtesy of libcdio */
36 /* 5.0 or earlier */
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
43 /* 5.5+ only */
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? */
52 union nrg_footer {
53 struct nrg_footer_v50 {
54 uint32_t dummy;
55 uint32_t id;
56 uint32_t offset;
57 } v50;
58 struct nrg_footer_v55 {
59 uint32_t id;
60 uint64_t offset;
61 } v55;
62 };
64 struct nrg_chunk {
65 uint32_t id;
66 uint32_t length;
67 };
69 struct nrg_etnf {
70 uint32_t offset;
71 uint32_t length;
72 uint32_t mode;
73 uint32_t lba;
74 uint32_t padding;
75 };
77 struct nrg_etn2 {
78 uint64_t offset;
79 uint64_t length;
80 uint32_t mode;
81 uint32_t lba;
82 uint64_t padding;
83 };
85 struct nrg_cues {
86 uint8_t type;
87 uint8_t track;
88 uint8_t control;
89 uint8_t pad;
90 uint32_t addr;
91 };
93 struct nrg_daoi {
94 uint32_t length;
95 char mcn[14];
96 uint8_t disc_mode;
97 uint8_t unknown[2]; /* always 01 01? */
98 uint8_t track_count;
99 struct nrg_daoi_track {
100 char unknown[10];
101 uint32_t sector_size __attribute__((packed)); /* Always 0? */
102 uint8_t mode;
103 uint8_t unknown2[3]; /* Always 00 00 01? */
104 uint32_t pregap __attribute__((packed));
105 uint32_t offset __attribute__((packed));
106 uint32_t end __attribute__((packed));
107 } track[0];
108 } __attribute__((packed));
110 struct nrg_daox {
111 uint32_t length;
112 char mcn[14];
113 uint8_t disc_mode;
114 uint8_t unknown[2]; /* always 01 01? */
115 uint8_t track_count;
116 struct nrg_daox_track {
117 char unknown[10];
118 uint32_t sector_size __attribute__((packed)); /* Always 0? */
119 uint8_t mode;
120 uint8_t unknown2[3]; /* Always 00 00 01? */
121 uint64_t pregap __attribute__((packed));
122 uint64_t offset __attribute__((packed));
123 uint64_t end __attribute__((packed));
124 } track[0];
125 } __attribute__((packed));
128 sector_mode_t static nrg_track_mode( uint8_t mode )
129 {
130 switch( mode ) {
131 case 0: return SECTOR_MODE1;
132 case 2: return SECTOR_MODE2_FORM1;
133 case 3: return SECTOR_SEMIRAW_MODE2;
134 case 7: return SECTOR_CDDA;
135 default: return -1;
136 }
137 }
139 static gboolean nrg_image_is_valid( FILE *f )
140 {
141 union nrg_footer footer;
143 fseek( f, -12, SEEK_END );
144 fread( &footer, sizeof(footer), 1, f );
145 if( GUINT32_FROM_BE(footer.v50.id) == NERO_V50_ID ||
146 GUINT32_FROM_BE(footer.v55.id) == NERO_V55_ID ) {
147 return TRUE;
148 } else {
149 return FALSE;
150 }
151 }
153 #define RETURN_PARSE_ERROR( ... ) do { SET_ERROR(err, LX_ERR_FILE_INVALID, __VA_ARGS__); return FALSE; } while(0)
155 static gboolean nrg_image_read_toc( cdrom_disc_t disc, ERROR *err )
156 {
157 union nrg_footer footer;
158 struct nrg_chunk chunk;
159 struct nrg_daoi *dao;
160 struct nrg_daox *daox;
161 struct nrg_etnf *etnf;
162 struct nrg_etn2 *etn2;
163 gboolean end = FALSE;
164 uint32_t chunk_id;
165 int session_id = 1;
166 int session_track_id = 0;
167 int track_id = 0;
168 int cue_track_id = 0, cue_track_count = 0;
169 int i, count;
171 FILE *f = cdrom_disc_get_base_file(disc);
173 fseek( f, -12, SEEK_END );
174 fread( &footer, sizeof(footer), 1, f );
175 if( GUINT32_FROM_BE(footer.v50.id) == NERO_V50_ID ) {
176 fseek( f, GUINT32_FROM_BE(footer.v50.offset), SEEK_SET );
177 } else if( GUINT32_FROM_BE(footer.v55.id) == NERO_V55_ID ) {
178 fseek( f, (uint32_t)GUINT64_FROM_BE(footer.v55.offset), SEEK_SET );
179 } else {
180 /* Not a (recognized) Nero image (should never happen) */
181 RETURN_PARSE_ERROR("File is not an NRG image" );
182 }
184 do {
185 fread( &chunk, sizeof(chunk), 1, f );
186 chunk.length = GUINT32_FROM_BE(chunk.length);
187 char data[chunk.length];
188 fread( data, chunk.length, 1, f );
189 chunk_id = GUINT32_FROM_BE(chunk.id);
190 switch( chunk_id ) {
191 case CUES_ID:
192 case CUEX_ID:
193 cue_track_id = track_id;
194 cue_track_count = ((chunk.length / sizeof(struct nrg_cues)) >> 1) - 1;
195 track_id += cue_track_count;
196 for( i=0; i<chunk.length; i+= sizeof(struct nrg_cues) ) {
197 struct nrg_cues *cue = (struct nrg_cues *)(data+i);
198 int track = 0;
199 uint32_t lba;
200 if( chunk_id == CUEX_ID ) {
201 lba = GUINT32_FROM_BE( cue->addr );
202 } else {
203 lba = BCD_MSFTOLBA( cue->addr );
204 }
205 if( cue->track == 0 )
206 continue; /* Track 0. Leadin? always 0? */
207 if( cue->track == 0xAA ) { /* end of disc */
208 disc->leadout = lba;
209 } else {
210 track = BCDTOU8(cue->track) - 1;
211 if( (cue->control & 0x01) != 0 ) {
212 /* Track-start address */
213 disc->track[track].lba = lba;
214 disc->track[track].flags = cue->type;
215 }
216 }
217 }
218 break;
219 case DAOI_ID:
220 dao = (struct nrg_daoi *)data;
221 count = dao->track_count - cue_track_id;
222 memcpy( disc->mcn, dao->mcn, 13 );
223 disc->mcn[13] = '\0';
224 if( dao->track_count != track_id ||
225 count * 30 + 22 != chunk.length ) {
226 RETURN_PARSE_ERROR( "Invalid NRG image file (bad DAOI block)" );
227 }
228 for( i=0; i<count; i++ ) {
229 uint32_t offset = GUINT32_FROM_BE(dao->track[i].offset);
230 sector_mode_t mode = nrg_track_mode( dao->track[i].mode );
231 if( mode == -1 ) {
232 RETURN_PARSE_ERROR("Unknown track mode in NRG image file (%d)", dao->track[i].mode);
233 }
234 if( CDROM_SECTOR_SIZE(mode) != GUINT32_FROM_BE(dao->track[i].sector_size) ) {
235 /* Sector size mismatch */
236 RETURN_PARSE_ERROR("Invalid NRG image file (Bad sector size in DAOI block)");
237 }
238 cdrom_count_t sector_count =
239 (GUINT32_FROM_BE(dao->track[i].end) - GUINT32_FROM_BE(dao->track[i].offset))/
240 CDROM_SECTOR_SIZE(mode);
241 disc->track[cue_track_id].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count );
242 cue_track_id++;
243 }
244 break;
245 case DAOX_ID:
246 daox = (struct nrg_daox *)data;
247 count = daox->track_count - cue_track_id;
248 memcpy( disc->mcn, daox->mcn, 13 );
249 disc->mcn[13] = '\0';
250 if( daox->track_count != track_id ||
251 count * 42 + 22 != chunk.length ) {
252 RETURN_PARSE_ERROR( "Invalid NRG image file (bad DAOX block)" );
253 }
254 for( i=0; i<count; i++ ) {
255 uint32_t offset = (uint32_t)GUINT64_FROM_BE(daox->track[i].offset);
256 sector_mode_t mode = nrg_track_mode( daox->track[i].mode );
257 if( mode == -1 ) {
258 RETURN_PARSE_ERROR("Unknown track mode in NRG image file (%d)", daox->track[i].mode);
259 }
260 if( CDROM_SECTOR_SIZE(mode) != GUINT32_FROM_BE(daox->track[i].sector_size) ) {
261 /* Sector size mismatch */
262 RETURN_PARSE_ERROR("Invalid NRG image file (Bad sector size in DAOX block)");
263 }
264 cdrom_count_t sector_count = (cdrom_count_t)
265 ((GUINT64_FROM_BE(daox->track[i].end) - GUINT64_FROM_BE(daox->track[i].offset))/
266 CDROM_SECTOR_SIZE(mode));
267 disc->track[cue_track_id].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count );
268 cue_track_id++;
269 }
270 break;
272 case SINF_ID:
273 /* Data is a single 32-bit number representing number of tracks in session */
274 i = GUINT32_FROM_BE( *(uint32_t *)data );
275 while( i-- > 0 )
276 disc->track[session_track_id++].sessionno = session_id;
277 session_id++;
278 break;
279 case ETNF_ID:
280 etnf = (struct nrg_etnf *)data;
281 count = chunk.length / sizeof(struct nrg_etnf);
282 for( i=0; i < count; i++, etnf++ ) {
283 uint32_t offset = GUINT32_FROM_BE(etnf->offset);
284 sector_mode_t mode = nrg_track_mode( GUINT32_FROM_BE(etnf->mode) );
285 if( mode == -1 ) {
286 RETURN_PARSE_ERROR("Unknown track mode in NRG image file (%d)", etnf->mode);
287 }
288 cdrom_count_t sector_count = GUINT32_FROM_BE(etnf->length) /
289 CDROM_SECTOR_SIZE(mode);
291 disc->track[track_id].lba = GUINT32_FROM_BE(etnf->lba) + i*CDROM_PREGAP;
292 if( mode == SECTOR_CDDA )
293 disc->track[track_id].flags = 0x01;
294 else
295 disc->track[track_id].flags = 0x01 | TRACK_FLAG_DATA;
296 disc->track[track_id].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count );
297 track_id++;
298 }
299 break;
300 case ETN2_ID:
301 etn2 = (struct nrg_etn2 *)data;
302 count = chunk.length / sizeof(struct nrg_etn2);
303 for( i=0; i < count; i++, etn2++ ) {
304 uint32_t offset = (uint32_t)GUINT64_FROM_BE(etn2->offset);
305 sector_mode_t mode = nrg_track_mode( GUINT32_FROM_BE(etn2->mode) );
306 if( mode == -1 ) {
307 RETURN_PARSE_ERROR("Unknown track mode in NRG image file (%d)", etn2->mode);
308 }
309 cdrom_count_t sector_count = (uint32_t)(GUINT64_FROM_BE(etn2->length) /
310 CDROM_SECTOR_SIZE(mode));
312 disc->track[track_id].lba = GUINT32_FROM_BE(etn2->lba) + i*CDROM_PREGAP;
313 if( mode == SECTOR_CDDA )
314 disc->track[track_id].flags = 0x01;
315 else
316 disc->track[track_id].flags = 0x01 | TRACK_FLAG_DATA;
317 disc->track[track_id].source = file_sector_source_new_source( disc->base_source, mode, offset, sector_count );
318 track_id++;
319 }
320 break;
322 case END_ID:
323 end = TRUE;
324 break;
325 }
326 } while( !end );
328 disc->track_count = track_id;
329 disc->session_count = session_id-1;
330 return TRUE;
331 }
.