| 1 | #include <formats/cdfs.h> |
| 2 | |
| 3 | #include <retro_miscellaneous.h> |
| 4 | #include <compat/strl.h> |
| 5 | #include <file/file_path.h> |
| 6 | #include <string/stdstring.h> |
| 7 | |
| 8 | #ifdef HAVE_CHD |
| 9 | #include <streams/chd_stream.h> |
| 10 | #endif |
| 11 | |
| 12 | static void cdfs_determine_sector_size(cdfs_track_t* track) |
| 13 | { |
| 14 | uint8_t buffer[32]; |
| 15 | const int toc_sector = 16; |
| 16 | |
| 17 | /* MODE information is normally found in the CUE sheet, but we can try to determine it from the raw data. |
| 18 | * |
| 19 | * MODE1/2048 - CDROM Mode1 Data (cooked) [no header, no footer] |
| 20 | * MODE1/2352 - CDROM Mode1 Data (raw) [16 byte header, 288 byte footer] |
| 21 | * MODE2/2336 - CDROM-XA Mode2 Data [8 byte header, 280 byte footer] |
| 22 | * MODE2/2352 - CDROM-XA Mode2 Data [24 byte header, 280 byte footer] |
| 23 | * |
| 24 | * Note that MODE is actually a property on each sector and can change between 1 and 2 depending on how much error |
| 25 | * correction the author desired. To support that, the data format must be "/2352" to include the full header and |
| 26 | * data without error correction information, at which point the CUE sheet information becomes just a hint. |
| 27 | */ |
| 28 | |
| 29 | /* The boot record or primary volume descriptor is always at sector 16 and will contain a "CD001" marker */ |
| 30 | intfstream_seek(track->stream, toc_sector * 2352 + track->first_sector_offset, SEEK_SET); |
| 31 | if (intfstream_read(track->stream, &buffer, sizeof(buffer)) != (int64_t)sizeof(buffer)) |
| 32 | return; |
| 33 | |
| 34 | /* if this is a CDROM-XA data source, the "CD001" tag will be 25 bytes into the sector */ |
| 35 | if ( buffer[25] == 0x43 |
| 36 | && buffer[26] == 0x44 |
| 37 | && buffer[27] == 0x30 |
| 38 | && buffer[28] == 0x30 |
| 39 | && buffer[29] == 0x31) |
| 40 | { |
| 41 | track->stream_sector_size = 2352; |
| 42 | track->stream_sector_header_size = 24; |
| 43 | } |
| 44 | /* otherwise it should be 17 bytes into the sector */ |
| 45 | else if (buffer[17] == 0x43 |
| 46 | && buffer[18] == 0x44 |
| 47 | && buffer[19] == 0x30 |
| 48 | && buffer[20] == 0x30 |
| 49 | && buffer[21] == 0x31) |
| 50 | { |
| 51 | track->stream_sector_size = 2352; |
| 52 | track->stream_sector_header_size = 16; |
| 53 | } |
| 54 | else |
| 55 | { |
| 56 | /* ISO-9660 says the first twelve bytes of a sector should be the sync pattern 00 FF FF FF FF FF FF FF FF FF FF 00 */ |
| 57 | if ( |
| 58 | buffer[ 0] == 0 |
| 59 | && buffer[ 1] == 0xFF |
| 60 | && buffer[ 2] == 0xFF |
| 61 | && buffer[ 3] == 0xFF |
| 62 | && buffer[ 4] == 0xFF |
| 63 | && buffer[ 5] == 0xFF |
| 64 | && buffer[ 6] == 0xFF |
| 65 | && buffer[ 7] == 0xFF |
| 66 | && buffer[ 8] == 0xFF |
| 67 | && buffer[ 9] == 0xFF |
| 68 | && buffer[10] == 0xFF |
| 69 | && buffer[11] == 0) |
| 70 | { |
| 71 | /* if we didn't find a CD001 tag, this format may predate ISO-9660 */ |
| 72 | |
| 73 | /* after the 12 byte sync pattern is three bytes identifying the sector and then one byte for the mode (total 16 bytes) */ |
| 74 | track->stream_sector_size = 2352; |
| 75 | track->stream_sector_header_size = 16; |
| 76 | } |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | static void cdfs_determine_sector_size_from_file_size(cdfs_track_t* track) |
| 81 | { |
| 82 | /* attempt to determine stream_sector_size from file size */ |
| 83 | size_t size = intfstream_get_size(track->stream); |
| 84 | |
| 85 | if ((size % 2352) == 0) |
| 86 | { |
| 87 | /* raw tracks use all 2352 bytes and have a 24 byte header */ |
| 88 | track->stream_sector_size = 2352; |
| 89 | track->stream_sector_header_size = 24; |
| 90 | } |
| 91 | else if ((size % 2048) == 0) |
| 92 | { |
| 93 | /* cooked tracks eliminate all header/footer data */ |
| 94 | track->stream_sector_size = 2048; |
| 95 | track->stream_sector_header_size = 0; |
| 96 | } |
| 97 | else if ((size % 2336) == 0) |
| 98 | { |
| 99 | /* MODE 2 format without 16-byte sync data */ |
| 100 | track->stream_sector_size = 2336; |
| 101 | track->stream_sector_header_size = 8; |
| 102 | } |
| 103 | } |
| 104 | |
| 105 | static void cdfs_seek_track_sector(cdfs_track_t* track, unsigned int sector) |
| 106 | { |
| 107 | intfstream_seek(track->stream, |
| 108 | sector * track->stream_sector_size |
| 109 | + track->stream_sector_header_size |
| 110 | + track->first_sector_offset, SEEK_SET); |
| 111 | } |
| 112 | |
| 113 | void cdfs_seek_sector(cdfs_file_t* file, unsigned int sector) |
| 114 | { |
| 115 | /* only allowed if open_file was called with a NULL path */ |
| 116 | if (file->first_sector == 0) |
| 117 | { |
| 118 | if (file->current_sector != (int)sector) |
| 119 | { |
| 120 | file->current_sector = (int)sector; |
| 121 | file->sector_buffer_valid = 0; |
| 122 | } |
| 123 | |
| 124 | file->pos = sector * 2048; |
| 125 | file->current_sector_offset = 0; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | uint32_t cdfs_get_num_sectors(cdfs_file_t* file) |
| 130 | { |
| 131 | uint32_t frame_size = intfstream_get_frame_size(file->track->stream); |
| 132 | if (frame_size == 0) |
| 133 | { |
| 134 | frame_size = file->track->stream_sector_size; |
| 135 | if (frame_size == 0) |
| 136 | frame_size = 1; /* prevent divide by 0 error if sector size is unknown */ |
| 137 | } |
| 138 | return (uint32_t)(intfstream_get_size(file->track->stream) / frame_size); |
| 139 | } |
| 140 | |
| 141 | uint32_t cdfs_get_first_sector(cdfs_file_t* file) |
| 142 | { |
| 143 | return file->track->first_sector_index; |
| 144 | } |
| 145 | |
| 146 | static int cdfs_find_file(cdfs_file_t* file, const char* path) |
| 147 | { |
| 148 | size_t path_length; |
| 149 | int sector; |
| 150 | uint8_t buffer[2048], *tmp; |
| 151 | const char* slash = strrchr(path, '\\'); |
| 152 | |
| 153 | if (slash) |
| 154 | { |
| 155 | /* navigate the path to the directory record for the file */ |
| 156 | const int dir_length = (int)(slash - path); |
| 157 | memcpy(buffer, path, dir_length); |
| 158 | buffer[dir_length] = '\0'; |
| 159 | |
| 160 | sector = cdfs_find_file(file, (const char*)buffer); |
| 161 | if (sector < 0) |
| 162 | return sector; |
| 163 | |
| 164 | path += dir_length + 1; |
| 165 | } |
| 166 | else |
| 167 | { |
| 168 | int offset; |
| 169 | |
| 170 | /* find the CD information (always 16 frames in) */ |
| 171 | cdfs_seek_track_sector(file->track, 16); |
| 172 | intfstream_read(file->track->stream, buffer, sizeof(buffer)); |
| 173 | |
| 174 | /* the directory_record starts at 156 bytes into the sector. |
| 175 | * the sector containing the root directory contents is a |
| 176 | * 3 byte value that is 2 bytes into the directory_record. */ |
| 177 | offset = 156 + 2; |
| 178 | sector = buffer[offset] | (buffer[offset + 1] << 8) | (buffer[offset + 2] << 16); |
| 179 | } |
| 180 | |
| 181 | /* process the contents of the directory */ |
| 182 | cdfs_seek_track_sector(file->track, sector); |
| 183 | intfstream_read(file->track->stream, buffer, sizeof(buffer)); |
| 184 | |
| 185 | path_length = strlen(path); |
| 186 | tmp = buffer; |
| 187 | |
| 188 | while (tmp < buffer + sizeof(buffer)) |
| 189 | { |
| 190 | /* The first byte of the record is the length of |
| 191 | * the record - if 0, we reached the end of the data */ |
| 192 | if (!*tmp) |
| 193 | break; |
| 194 | |
| 195 | /* filename is 33 bytes into the record and |
| 196 | * the format is "FILENAME;version" or "DIRECTORY" */ |
| 197 | if ( (tmp[33 + path_length] == ';' |
| 198 | || (tmp[33 + path_length] == '\0')) |
| 199 | && strncasecmp((const char*)(tmp + 33), path, path_length) == 0) |
| 200 | { |
| 201 | /* the file size is in bytes 10-13 of the record */ |
| 202 | file->size = |
| 203 | (tmp[10]) |
| 204 | | (tmp[11] << 8) |
| 205 | | (tmp[12] << 16) |
| 206 | | (tmp[13] << 24); |
| 207 | |
| 208 | /* the file contents are in the sector identified |
| 209 | * in bytes 2-4 of the record */ |
| 210 | sector = tmp[2] | (tmp[3] << 8) | (tmp[4] << 16); |
| 211 | return sector; |
| 212 | } |
| 213 | |
| 214 | /* the first byte of the record is the length of the record */ |
| 215 | tmp += tmp[0]; |
| 216 | } |
| 217 | |
| 218 | return -1; |
| 219 | } |
| 220 | |
| 221 | int cdfs_open_file(cdfs_file_t* file, cdfs_track_t* track, const char* path) |
| 222 | { |
| 223 | if (!file || !track) |
| 224 | return 0; |
| 225 | |
| 226 | memset(file, 0, sizeof(*file)); |
| 227 | |
| 228 | file->track = track; |
| 229 | file->current_sector = -1; |
| 230 | file->first_sector = -1; |
| 231 | |
| 232 | if (path) |
| 233 | file->first_sector = cdfs_find_file(file, path); |
| 234 | else if (file->track->stream_sector_size) |
| 235 | { |
| 236 | file->first_sector = 0; |
| 237 | file->size = (unsigned int)((intfstream_get_size( |
| 238 | file->track->stream) / file->track->stream_sector_size) |
| 239 | * 2048); |
| 240 | return 1; |
| 241 | } |
| 242 | |
| 243 | return (file->first_sector >= 0); |
| 244 | } |
| 245 | |
| 246 | int64_t cdfs_read_file(cdfs_file_t* file, void* buffer, uint64_t len) |
| 247 | { |
| 248 | int bytes_read = 0; |
| 249 | |
| 250 | if (!file || file->first_sector < 0 || !buffer) |
| 251 | return 0; |
| 252 | |
| 253 | if (len > file->size - file->pos) |
| 254 | len = file->size - file->pos; |
| 255 | |
| 256 | if (len == 0) |
| 257 | return 0; |
| 258 | |
| 259 | if (file->sector_buffer_valid) |
| 260 | { |
| 261 | size_t remaining = 2048 - file->current_sector_offset; |
| 262 | if (remaining > 0) |
| 263 | { |
| 264 | if (remaining >= len) |
| 265 | { |
| 266 | memcpy(buffer, |
| 267 | &file->sector_buffer[file->current_sector_offset], |
| 268 | (size_t)len); |
| 269 | file->current_sector_offset += len; |
| 270 | return len; |
| 271 | } |
| 272 | |
| 273 | memcpy(buffer, |
| 274 | &file->sector_buffer[file->current_sector_offset], remaining); |
| 275 | buffer = (char*)buffer + remaining; |
| 276 | bytes_read += remaining; |
| 277 | len -= remaining; |
| 278 | |
| 279 | file->current_sector_offset += remaining; |
| 280 | } |
| 281 | |
| 282 | ++file->current_sector; |
| 283 | file->current_sector_offset = 0; |
| 284 | file->sector_buffer_valid = 0; |
| 285 | } |
| 286 | else if (file->current_sector < file->first_sector) |
| 287 | { |
| 288 | file->current_sector = file->first_sector; |
| 289 | file->current_sector_offset = 0; |
| 290 | } |
| 291 | |
| 292 | while (len >= 2048) |
| 293 | { |
| 294 | cdfs_seek_track_sector(file->track, file->current_sector); |
| 295 | intfstream_read(file->track->stream, buffer, 2048); |
| 296 | |
| 297 | buffer = (char*)buffer + 2048; |
| 298 | bytes_read += 2048; |
| 299 | |
| 300 | ++file->current_sector; |
| 301 | |
| 302 | len -= 2048; |
| 303 | } |
| 304 | |
| 305 | if (len > 0) |
| 306 | { |
| 307 | cdfs_seek_track_sector(file->track, file->current_sector); |
| 308 | intfstream_read(file->track->stream, file->sector_buffer, 2048); |
| 309 | memcpy(buffer, file->sector_buffer, (size_t)len); |
| 310 | file->current_sector_offset = (unsigned int)len; |
| 311 | file->sector_buffer_valid = 1; |
| 312 | |
| 313 | bytes_read += len; |
| 314 | } |
| 315 | |
| 316 | file->pos += bytes_read; |
| 317 | return bytes_read; |
| 318 | } |
| 319 | |
| 320 | void cdfs_close_file(cdfs_file_t* file) |
| 321 | { |
| 322 | /* Not really anything to do here, just |
| 323 | * clear out the first_sector so |
| 324 | * read() won't do anything */ |
| 325 | if (file) |
| 326 | file->first_sector = -1; |
| 327 | } |
| 328 | |
| 329 | int64_t cdfs_get_size(cdfs_file_t* file) |
| 330 | { |
| 331 | if (!file || file->first_sector < 0) |
| 332 | return 0; |
| 333 | return file->size; |
| 334 | } |
| 335 | |
| 336 | int64_t cdfs_tell(cdfs_file_t* file) |
| 337 | { |
| 338 | if (!file || file->first_sector < 0) |
| 339 | return -1; |
| 340 | return file->pos; |
| 341 | } |
| 342 | |
| 343 | int64_t cdfs_seek(cdfs_file_t* file, int64_t offset, int whence) |
| 344 | { |
| 345 | int64_t new_pos; |
| 346 | int new_sector; |
| 347 | |
| 348 | if (!file || file->first_sector < 0) |
| 349 | return -1; |
| 350 | |
| 351 | switch (whence) |
| 352 | { |
| 353 | case SEEK_SET: |
| 354 | new_pos = offset; |
| 355 | break; |
| 356 | |
| 357 | case SEEK_CUR: |
| 358 | new_pos = file->pos + offset; |
| 359 | break; |
| 360 | |
| 361 | case SEEK_END: |
| 362 | new_pos = file->size - offset; |
| 363 | break; |
| 364 | |
| 365 | default: |
| 366 | return -1; |
| 367 | } |
| 368 | |
| 369 | if (new_pos < 0) |
| 370 | return -1; |
| 371 | else if (new_pos > file->size) |
| 372 | return -1; |
| 373 | |
| 374 | file->pos = (unsigned int)new_pos; |
| 375 | file->current_sector_offset = file->pos % 2048; |
| 376 | |
| 377 | new_sector = file->pos / 2048; |
| 378 | if (new_sector != file->current_sector) |
| 379 | { |
| 380 | file->current_sector = new_sector; |
| 381 | file->sector_buffer_valid = false; |
| 382 | } |
| 383 | |
| 384 | return 0; |
| 385 | } |
| 386 | |
| 387 | static void cdfs_skip_spaces(const char** ptr) |
| 388 | { |
| 389 | while (**ptr && (**ptr == ' ' || **ptr == '\t')) |
| 390 | ++(*ptr); |
| 391 | } |
| 392 | |
| 393 | static cdfs_track_t* cdfs_wrap_stream( |
| 394 | intfstream_t* stream, |
| 395 | unsigned first_sector_offset, |
| 396 | unsigned first_sector_index) |
| 397 | { |
| 398 | cdfs_track_t* track = NULL; |
| 399 | |
| 400 | if (!stream) |
| 401 | return NULL; |
| 402 | |
| 403 | track = (cdfs_track_t*) |
| 404 | calloc(1, sizeof(*track)); |
| 405 | track->stream = stream; |
| 406 | track->first_sector_offset = first_sector_offset; |
| 407 | track->first_sector_index = first_sector_index; |
| 408 | |
| 409 | cdfs_determine_sector_size(track); |
| 410 | |
| 411 | return track; |
| 412 | } |
| 413 | |
| 414 | static cdfs_track_t* cdfs_open_cue_track( |
| 415 | const char* path, unsigned int track_index) |
| 416 | { |
| 417 | char* cue = NULL; |
| 418 | const char* line = NULL; |
| 419 | int found_track = 0; |
| 420 | char current_track_path[PATH_MAX_LENGTH] = {0}; |
| 421 | char track_path[PATH_MAX_LENGTH] = {0}; |
| 422 | unsigned int sector_size = 0; |
| 423 | unsigned int previous_sector_size = 0; |
| 424 | unsigned int previous_index_sector_offset= 0; |
| 425 | unsigned int track_offset = 0; |
| 426 | intfstream_t *cue_stream = intfstream_open_file(path, RETRO_VFS_FILE_ACCESS_READ, RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 427 | int64_t stream_size = intfstream_get_size(cue_stream); |
| 428 | char *cue_contents = (char*)malloc((size_t)(stream_size + 1)); |
| 429 | cdfs_track_t* track = NULL; |
| 430 | |
| 431 | if (!cue_contents) |
| 432 | { |
| 433 | intfstream_close(cue_stream); |
| 434 | return NULL; |
| 435 | } |
| 436 | |
| 437 | intfstream_read(cue_stream, cue_contents, stream_size); |
| 438 | intfstream_close(cue_stream); |
| 439 | |
| 440 | cue_contents[stream_size] = '\0'; |
| 441 | |
| 442 | cue = cue_contents; |
| 443 | while (*cue) |
| 444 | { |
| 445 | cdfs_skip_spaces((const char**)&cue); |
| 446 | line = cue; |
| 447 | |
| 448 | while (*cue && *cue != '\n') |
| 449 | ++cue; |
| 450 | if (*cue) |
| 451 | *cue++ = '\0'; |
| 452 | |
| 453 | if (!strncasecmp(line, "FILE", 4)) |
| 454 | { |
| 455 | const char *file = line + 4; |
| 456 | cdfs_skip_spaces(&file); |
| 457 | |
| 458 | if (file[0]) |
| 459 | { |
| 460 | const char *file_end = cue - 1; |
| 461 | while (file_end > file && *file_end != ' ' && *file_end != '\t') |
| 462 | --file_end; |
| 463 | |
| 464 | if ( file[0] == '"' |
| 465 | && file_end[-1] == '"') |
| 466 | { |
| 467 | ++file; |
| 468 | --file_end; |
| 469 | } |
| 470 | |
| 471 | memcpy(current_track_path, file, file_end - file); |
| 472 | current_track_path[file_end - file] = '\0'; |
| 473 | } |
| 474 | |
| 475 | previous_sector_size = 0; |
| 476 | previous_index_sector_offset = 0; |
| 477 | track_offset = 0; |
| 478 | } |
| 479 | else if (!strncasecmp(line, "TRACK", 5)) |
| 480 | { |
| 481 | char *ptr = NULL; |
| 482 | unsigned track_number = 0; |
| 483 | const char *track = line + 5; |
| 484 | cdfs_skip_spaces(&track); |
| 485 | |
| 486 | track_number = (unsigned)strtol(track, &ptr, 10); |
| 487 | while (*track && *track != ' ' && *track != '\n') |
| 488 | ++track; |
| 489 | |
| 490 | previous_sector_size = sector_size; |
| 491 | |
| 492 | cdfs_skip_spaces(&track); |
| 493 | |
| 494 | if (!strncasecmp(track, "MODE", 4)) |
| 495 | { |
| 496 | /* track_index = 0 means find the first data track */ |
| 497 | if (!track_index || track_index == track_number) |
| 498 | found_track = track_number; |
| 499 | |
| 500 | sector_size = atoi(track + 6); |
| 501 | } |
| 502 | else /* assume AUDIO */ |
| 503 | sector_size = 2352; |
| 504 | } |
| 505 | else if (!strncasecmp(line, "INDEX", 5)) |
| 506 | { |
| 507 | unsigned sector_offset; |
| 508 | unsigned min = 0, sec = 0, frame = 0; |
| 509 | unsigned index_number = 0; |
| 510 | const char *index = line + 5; |
| 511 | |
| 512 | cdfs_skip_spaces(&index); |
| 513 | sscanf(index, "%u", &index_number); |
| 514 | while (*index && *index != ' ' && *index != '\n') |
| 515 | ++index; |
| 516 | cdfs_skip_spaces(&index); |
| 517 | |
| 518 | sscanf(index, "%u:%u:%u", &min, &sec, &frame); |
| 519 | sector_offset = ((min * 60) + sec) * 75 + frame; |
| 520 | sector_offset -= previous_index_sector_offset; |
| 521 | track_offset += sector_offset * previous_sector_size; |
| 522 | previous_sector_size = sector_size; |
| 523 | previous_index_sector_offset += sector_offset; |
| 524 | |
| 525 | if (found_track && index_number == 1) |
| 526 | { |
| 527 | if ( strstr(current_track_path, "/") |
| 528 | || strstr(current_track_path, "\\")) |
| 529 | strncpy(track_path, current_track_path, sizeof(track_path)); |
| 530 | else |
| 531 | { |
| 532 | fill_pathname_basedir(track_path, path, sizeof(track_path)); |
| 533 | strlcat(track_path, current_track_path, sizeof(track_path)); |
| 534 | } |
| 535 | |
| 536 | break; |
| 537 | } |
| 538 | } |
| 539 | } |
| 540 | |
| 541 | free(cue_contents); |
| 542 | |
| 543 | if (string_is_empty(track_path)) |
| 544 | return NULL; |
| 545 | |
| 546 | /* NOTE: previous_index_sector_offset will only be valid if all tracks are in the same BIN file. |
| 547 | * Otherwise, we need to determine how many tracks are in each previous BIN file, which is not |
| 548 | * stored in the CUE file. This will affect cdfs_get_first_sector, which luckily isn't used much. */ |
| 549 | track = cdfs_wrap_stream(intfstream_open_file( |
| 550 | track_path, RETRO_VFS_FILE_ACCESS_READ, |
| 551 | RETRO_VFS_FILE_ACCESS_HINT_NONE), track_offset, previous_index_sector_offset); |
| 552 | |
| 553 | if (track && track->stream_sector_size == 0) |
| 554 | { |
| 555 | track->stream_sector_size = sector_size; |
| 556 | |
| 557 | if (sector_size == 2352) |
| 558 | track->stream_sector_header_size = 16; |
| 559 | else if (sector_size == 2336) |
| 560 | track->stream_sector_header_size = 8; |
| 561 | } |
| 562 | |
| 563 | return track; |
| 564 | } |
| 565 | |
| 566 | #ifdef HAVE_CHD |
| 567 | static cdfs_track_t* cdfs_open_chd_track(const char* path, int32_t track_index) |
| 568 | { |
| 569 | cdfs_track_t *track; |
| 570 | intfstream_t *intf_stream = intfstream_open_chd_track(path, |
| 571 | RETRO_VFS_FILE_ACCESS_READ, RETRO_VFS_FILE_ACCESS_HINT_NONE, |
| 572 | track_index); |
| 573 | if (!intf_stream) |
| 574 | return NULL; |
| 575 | |
| 576 | track = cdfs_wrap_stream(intf_stream, |
| 577 | intfstream_get_offset_to_start(intf_stream), |
| 578 | intfstream_get_first_sector(intf_stream)); |
| 579 | |
| 580 | if (track && track->stream_sector_header_size == 0) |
| 581 | { |
| 582 | track->stream_sector_size = intfstream_get_frame_size(intf_stream); |
| 583 | |
| 584 | if (track->stream_sector_size == 2352) |
| 585 | track->stream_sector_header_size = 16; |
| 586 | else if (track->stream_sector_size == 2336) |
| 587 | track->stream_sector_header_size = 8; |
| 588 | } |
| 589 | |
| 590 | return track; |
| 591 | } |
| 592 | #endif |
| 593 | |
| 594 | struct cdfs_track_t* cdfs_open_track(const char* path, |
| 595 | unsigned int track_index) |
| 596 | { |
| 597 | const char* ext = path_get_extension(path); |
| 598 | |
| 599 | if (string_is_equal_noncase(ext, "cue")) |
| 600 | return cdfs_open_cue_track(path, track_index); |
| 601 | |
| 602 | #ifdef HAVE_CHD |
| 603 | if (string_is_equal_noncase(ext, "chd")) |
| 604 | return cdfs_open_chd_track(path, track_index); |
| 605 | #endif |
| 606 | |
| 607 | /* if opening track 1, try opening as a raw track */ |
| 608 | if (track_index == 1) |
| 609 | return cdfs_open_raw_track(path); |
| 610 | |
| 611 | /* unsupported file type */ |
| 612 | return NULL; |
| 613 | } |
| 614 | |
| 615 | struct cdfs_track_t* cdfs_open_data_track(const char* path) |
| 616 | { |
| 617 | const char* ext = path_get_extension(path); |
| 618 | |
| 619 | if (string_is_equal_noncase(ext, "cue")) |
| 620 | return cdfs_open_cue_track(path, 0); |
| 621 | |
| 622 | #ifdef HAVE_CHD |
| 623 | if (string_is_equal_noncase(ext, "chd")) |
| 624 | return cdfs_open_chd_track(path, CHDSTREAM_TRACK_PRIMARY); |
| 625 | #endif |
| 626 | |
| 627 | /* unsupported file type - try opening as a raw track */ |
| 628 | return cdfs_open_raw_track(path); |
| 629 | } |
| 630 | |
| 631 | cdfs_track_t* cdfs_open_raw_track(const char* path) |
| 632 | { |
| 633 | const char *ext = path_get_extension(path); |
| 634 | cdfs_track_t *track = NULL; |
| 635 | |
| 636 | if ( string_is_equal_noncase(ext, "bin") |
| 637 | || string_is_equal_noncase(ext, "iso")) |
| 638 | { |
| 639 | intfstream_t* file = intfstream_open_file(path, |
| 640 | RETRO_VFS_FILE_ACCESS_READ, RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 641 | |
| 642 | track = cdfs_wrap_stream(file, 0, 0); |
| 643 | if (track && track->stream_sector_size == 0) |
| 644 | { |
| 645 | cdfs_determine_sector_size_from_file_size(track); |
| 646 | if (track->stream_sector_size == 0) |
| 647 | { |
| 648 | cdfs_close_track(track); |
| 649 | track = NULL; |
| 650 | } |
| 651 | } |
| 652 | } |
| 653 | |
| 654 | return track; |
| 655 | } |
| 656 | |
| 657 | void cdfs_close_track(cdfs_track_t* track) |
| 658 | { |
| 659 | if (track) |
| 660 | { |
| 661 | if (track->stream) |
| 662 | { |
| 663 | intfstream_close(track->stream); |
| 664 | free(track->stream); |
| 665 | } |
| 666 | |
| 667 | free(track); |
| 668 | } |
| 669 | } |