| 1 | /* |
| 2 | * (C) GraÅžvydas "notaz" Ignotas, 2010 |
| 3 | * |
| 4 | * This work is licensed under the terms of any of these licenses |
| 5 | * (at your option): |
| 6 | * - GNU GPL, version 2 or later. |
| 7 | * - GNU LGPL, version 2.1 or later. |
| 8 | * See the COPYING file in the top-level directory. |
| 9 | */ |
| 10 | |
| 11 | #include <stdio.h> |
| 12 | #include <string.h> |
| 13 | #include <stdlib.h> |
| 14 | #include <zlib.h> |
| 15 | #include <bzlib.h> |
| 16 | |
| 17 | #include "cdrcimg.h" |
| 18 | |
| 19 | #define PFX "cdrcimg: " |
| 20 | #define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__) |
| 21 | |
| 22 | #define CD_FRAMESIZE_RAW 2352 |
| 23 | |
| 24 | enum { |
| 25 | CDRC_ZLIB, |
| 26 | CDRC_ZLIB2, |
| 27 | CDRC_BZ, |
| 28 | }; |
| 29 | |
| 30 | static const char *cd_fname; |
| 31 | static unsigned int *cd_index_table; |
| 32 | static unsigned int cd_index_len; |
| 33 | static unsigned int cd_sectors_per_blk; |
| 34 | static int cd_compression; |
| 35 | static FILE *cd_file; |
| 36 | |
| 37 | static struct { |
| 38 | unsigned char raw[16][CD_FRAMESIZE_RAW]; |
| 39 | unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100]; |
| 40 | } *cdbuffer; |
| 41 | static int current_block, current_sect_in_blk; |
| 42 | |
| 43 | struct CdrStat; |
| 44 | extern long CDR__getStatus(struct CdrStat *stat); |
| 45 | |
| 46 | struct CdrStat |
| 47 | { |
| 48 | unsigned long Type; |
| 49 | unsigned long Status; |
| 50 | unsigned char Time[3]; // current playing time |
| 51 | }; |
| 52 | |
| 53 | struct trackinfo { |
| 54 | enum {DATA, CDDA} type; |
| 55 | char start[3]; // MSF-format |
| 56 | char length[3]; // MSF-format |
| 57 | }; |
| 58 | |
| 59 | #define MAXTRACKS 100 /* How many tracks can a CD hold? */ |
| 60 | |
| 61 | static int numtracks = 0; |
| 62 | |
| 63 | #define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */ |
| 64 | #define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f)) |
| 65 | |
| 66 | // return Starting and Ending Track |
| 67 | // buffer: |
| 68 | // byte 0 - start track |
| 69 | // byte 1 - end track |
| 70 | static long CDRgetTN(unsigned char *buffer) |
| 71 | { |
| 72 | buffer[0] = 1; |
| 73 | buffer[1] = numtracks > 0 ? numtracks : 1; |
| 74 | |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | // return Track Time |
| 79 | // buffer: |
| 80 | // byte 0 - frame |
| 81 | // byte 1 - second |
| 82 | // byte 2 - minute |
| 83 | static long CDRgetTD(unsigned char track, unsigned char *buffer) |
| 84 | { |
| 85 | buffer[2] = 0; |
| 86 | buffer[1] = 2; |
| 87 | buffer[0] = 0; |
| 88 | |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size) |
| 93 | { |
| 94 | static z_stream z; |
| 95 | int ret = 0; |
| 96 | |
| 97 | if (z.zalloc == NULL) { |
| 98 | // XXX: one-time leak here.. |
| 99 | z.next_in = Z_NULL; |
| 100 | z.avail_in = 0; |
| 101 | z.zalloc = Z_NULL; |
| 102 | z.zfree = Z_NULL; |
| 103 | z.opaque = Z_NULL; |
| 104 | ret = inflateInit2(&z, -15); |
| 105 | } |
| 106 | else |
| 107 | ret = inflateReset(&z); |
| 108 | if (ret != Z_OK) |
| 109 | return ret; |
| 110 | |
| 111 | z.next_in = in; |
| 112 | z.avail_in = in_size; |
| 113 | z.next_out = out; |
| 114 | z.avail_out = *out_size; |
| 115 | |
| 116 | ret = inflate(&z, Z_NO_FLUSH); |
| 117 | //inflateEnd(&z); |
| 118 | |
| 119 | *out_size -= z.avail_out; |
| 120 | return ret == 1 ? 0 : ret; |
| 121 | } |
| 122 | |
| 123 | // read track |
| 124 | // time: byte 0 - minute; byte 1 - second; byte 2 - frame |
| 125 | // uses bcd format |
| 126 | static long CDRreadTrack(unsigned char *time) |
| 127 | { |
| 128 | unsigned int start_byte, size; |
| 129 | unsigned long cdbuffer_size; |
| 130 | int ret, sector, block; |
| 131 | |
| 132 | if (cd_file == NULL) |
| 133 | return -1; |
| 134 | |
| 135 | sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2])); |
| 136 | |
| 137 | // avoid division if possible |
| 138 | switch (cd_sectors_per_blk) { |
| 139 | case 1: |
| 140 | block = sector; |
| 141 | current_sect_in_blk = 0; |
| 142 | break; |
| 143 | case 10: |
| 144 | block = sector / 10; |
| 145 | current_sect_in_blk = sector % 10; |
| 146 | break; |
| 147 | case 16: |
| 148 | block = sector >> 4; |
| 149 | current_sect_in_blk = sector & 15; |
| 150 | break; |
| 151 | default: |
| 152 | err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk); |
| 153 | return -1; |
| 154 | } |
| 155 | |
| 156 | if (block == current_block) { |
| 157 | // it's already there, nothing to do |
| 158 | //printf("hit sect %d\n", sector); |
| 159 | return 0; |
| 160 | } |
| 161 | |
| 162 | if (sector >= cd_index_len * cd_sectors_per_blk) { |
| 163 | err("sector %d is past track end\n", sector); |
| 164 | return -1; |
| 165 | } |
| 166 | |
| 167 | start_byte = cd_index_table[block]; |
| 168 | if (fseek(cd_file, start_byte, SEEK_SET) != 0) { |
| 169 | err("seek error for block %d at %x: ", |
| 170 | block, start_byte); |
| 171 | perror(NULL); |
| 172 | return -1; |
| 173 | } |
| 174 | |
| 175 | size = cd_index_table[block + 1] - start_byte; |
| 176 | if (size > sizeof(cdbuffer->compressed)) { |
| 177 | err("block %d is too large: %u\n", block, size); |
| 178 | return -1; |
| 179 | } |
| 180 | |
| 181 | if (fread(cdbuffer->compressed, 1, size, cd_file) != size) { |
| 182 | err("read error for block %d at %x: ", block, start_byte); |
| 183 | perror(NULL); |
| 184 | return -1; |
| 185 | } |
| 186 | |
| 187 | cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk; |
| 188 | switch (cd_compression) { |
| 189 | case CDRC_ZLIB: |
| 190 | ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size); |
| 191 | break; |
| 192 | case CDRC_ZLIB2: |
| 193 | ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size); |
| 194 | break; |
| 195 | case CDRC_BZ: |
| 196 | ret = BZ2_bzBuffToBuffDecompress((char *)cdbuffer->raw, (unsigned int *)&cdbuffer_size, |
| 197 | (char *)cdbuffer->compressed, size, 0, 0); |
| 198 | break; |
| 199 | default: |
| 200 | err("bad cd_compression: %d\n", cd_compression); |
| 201 | return -1; |
| 202 | } |
| 203 | |
| 204 | if (ret != 0) { |
| 205 | err("uncompress failed with %d for block %d, sector %d\n", |
| 206 | ret, block, sector); |
| 207 | return -1; |
| 208 | } |
| 209 | if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk) |
| 210 | err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size, |
| 211 | sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector); |
| 212 | |
| 213 | // done at last! |
| 214 | current_block = block; |
| 215 | return 0; |
| 216 | } |
| 217 | |
| 218 | // return read track |
| 219 | static unsigned char *CDRgetBuffer(void) |
| 220 | { |
| 221 | return cdbuffer->raw[current_sect_in_blk] + 12; |
| 222 | } |
| 223 | |
| 224 | // plays cdda audio |
| 225 | // sector: byte 0 - minute; byte 1 - second; byte 2 - frame |
| 226 | // does NOT uses bcd format |
| 227 | static long CDRplay(unsigned char *time) |
| 228 | { |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | // stops cdda audio |
| 233 | static long CDRstop(void) |
| 234 | { |
| 235 | return 0; |
| 236 | } |
| 237 | |
| 238 | // gets subchannel data |
| 239 | static unsigned char* CDRgetBufferSub(void) |
| 240 | { |
| 241 | return NULL; |
| 242 | } |
| 243 | |
| 244 | static long CDRgetStatus(struct CdrStat *stat) { |
| 245 | CDR__getStatus(stat); |
| 246 | |
| 247 | stat->Type = 0x01; |
| 248 | |
| 249 | return 0; |
| 250 | } |
| 251 | |
| 252 | static long CDRclose(void) |
| 253 | { |
| 254 | if (cd_file != NULL) { |
| 255 | fclose(cd_file); |
| 256 | cd_file = NULL; |
| 257 | } |
| 258 | if (cd_index_table != NULL) { |
| 259 | free(cd_index_table); |
| 260 | cd_index_table = NULL; |
| 261 | } |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | static long CDRshutdown(void) |
| 266 | { |
| 267 | return CDRclose(); |
| 268 | } |
| 269 | |
| 270 | static long CDRinit(void) |
| 271 | { |
| 272 | if (cdbuffer == NULL) { |
| 273 | cdbuffer = malloc(sizeof(*cdbuffer)); |
| 274 | if (cdbuffer == NULL) { |
| 275 | err("OOM\n"); |
| 276 | return -1; |
| 277 | } |
| 278 | } |
| 279 | return 0; |
| 280 | } |
| 281 | |
| 282 | static long handle_eboot(void) |
| 283 | { |
| 284 | struct { |
| 285 | unsigned int sig; |
| 286 | unsigned int dontcare[8]; |
| 287 | unsigned int psar_offs; |
| 288 | } pbp_hdr; |
| 289 | struct { |
| 290 | unsigned int offset; |
| 291 | unsigned int size; |
| 292 | unsigned int dontcare[6]; |
| 293 | } index_entry; |
| 294 | char psar_sig[9]; |
| 295 | unsigned int cdimg_base; |
| 296 | int i, ret; |
| 297 | FILE *f; |
| 298 | |
| 299 | f = fopen(cd_fname, "rb"); |
| 300 | if (f == NULL) { |
| 301 | err("missing file: %s: ", cd_fname); |
| 302 | perror(NULL); |
| 303 | return -1; |
| 304 | } |
| 305 | |
| 306 | ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f); |
| 307 | if (ret != sizeof(pbp_hdr)) { |
| 308 | err("failed to read pbp\n"); |
| 309 | goto fail_io; |
| 310 | } |
| 311 | |
| 312 | ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET); |
| 313 | if (ret != 0) { |
| 314 | err("failed to seek to %x\n", pbp_hdr.psar_offs); |
| 315 | goto fail_io; |
| 316 | } |
| 317 | |
| 318 | ret = fread(psar_sig, 1, sizeof(psar_sig), f); |
| 319 | if (ret != sizeof(psar_sig)) { |
| 320 | err("failed to read psar_sig\n"); |
| 321 | goto fail_io; |
| 322 | } |
| 323 | |
| 324 | psar_sig[8] = 0; |
| 325 | if (strcmp(psar_sig, "PSISOIMG") != 0) { |
| 326 | err("bad psar_sig: %s\n", psar_sig); |
| 327 | goto fail_io; |
| 328 | } |
| 329 | |
| 330 | // seek to ISO index |
| 331 | ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR); |
| 332 | if (ret != 0) { |
| 333 | err("failed to seek to ISO index\n"); |
| 334 | goto fail_io; |
| 335 | } |
| 336 | |
| 337 | cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry); |
| 338 | cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0])); |
| 339 | if (cd_index_table == NULL) |
| 340 | goto fail_io; |
| 341 | |
| 342 | cdimg_base = pbp_hdr.psar_offs + 0x100000; |
| 343 | for (i = 0; i < cd_index_len; i++) { |
| 344 | ret = fread(&index_entry, 1, sizeof(index_entry), f); |
| 345 | if (ret != sizeof(index_entry)) { |
| 346 | err("failed to read index_entry #%d\n", i); |
| 347 | goto fail_index; |
| 348 | } |
| 349 | |
| 350 | if (index_entry.size == 0) |
| 351 | break; |
| 352 | |
| 353 | cd_index_table[i] = cdimg_base + index_entry.offset; |
| 354 | } |
| 355 | cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size; |
| 356 | |
| 357 | cd_compression = CDRC_ZLIB2; |
| 358 | cd_sectors_per_blk = 16; |
| 359 | cd_file = f; |
| 360 | |
| 361 | printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname); |
| 362 | return 0; |
| 363 | |
| 364 | fail_index: |
| 365 | free(cd_index_table); |
| 366 | cd_index_table = NULL; |
| 367 | fail_io: |
| 368 | fclose(f); |
| 369 | return -1; |
| 370 | } |
| 371 | |
| 372 | // This function is invoked by the front-end when opening an ISO |
| 373 | // file for playback |
| 374 | static long CDRopen(void) |
| 375 | { |
| 376 | union { |
| 377 | struct { |
| 378 | unsigned int offset; |
| 379 | unsigned short size; |
| 380 | } __attribute__((packed)) ztab_entry; |
| 381 | struct { |
| 382 | unsigned int offset; |
| 383 | unsigned short size; |
| 384 | unsigned int dontcare; |
| 385 | } __attribute__((packed)) znxtab_entry; |
| 386 | unsigned int bztab_entry; |
| 387 | } u; |
| 388 | int tabentry_size; |
| 389 | char table_fname[256]; |
| 390 | long table_size; |
| 391 | int i, ret; |
| 392 | char *ext; |
| 393 | FILE *f = NULL; |
| 394 | |
| 395 | if (cd_file != NULL) |
| 396 | return 0; // it's already open |
| 397 | |
| 398 | numtracks = 0; |
| 399 | current_block = -1; |
| 400 | current_sect_in_blk = 0; |
| 401 | |
| 402 | if (cd_fname == NULL) |
| 403 | return -1; |
| 404 | |
| 405 | ext = strrchr(cd_fname, '.'); |
| 406 | if (ext == NULL) |
| 407 | return -1; |
| 408 | |
| 409 | if (strcasecmp(ext, ".pbp") == 0) { |
| 410 | return handle_eboot(); |
| 411 | } |
| 412 | |
| 413 | // pocketiso stuff |
| 414 | else if (strcasecmp(ext, ".z") == 0) { |
| 415 | cd_compression = CDRC_ZLIB; |
| 416 | tabentry_size = sizeof(u.ztab_entry); |
| 417 | snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname); |
| 418 | } |
| 419 | else if (strcasecmp(ext, ".znx") == 0) { |
| 420 | cd_compression = CDRC_ZLIB; |
| 421 | tabentry_size = sizeof(u.znxtab_entry); |
| 422 | snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname); |
| 423 | } |
| 424 | else if (strcasecmp(ext, ".bz") == 0) { |
| 425 | cd_compression = CDRC_BZ; |
| 426 | tabentry_size = sizeof(u.bztab_entry); |
| 427 | snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname); |
| 428 | } |
| 429 | else { |
| 430 | err("unhandled extension: %s\n", ext); |
| 431 | return -1; |
| 432 | } |
| 433 | |
| 434 | f = fopen(table_fname, "rb"); |
| 435 | if (f == NULL) { |
| 436 | err("missing file: %s: ", table_fname); |
| 437 | perror(NULL); |
| 438 | return -1; |
| 439 | } |
| 440 | |
| 441 | ret = fseek(f, 0, SEEK_END); |
| 442 | if (ret != 0) { |
| 443 | err("failed to seek\n"); |
| 444 | goto fail_table_io; |
| 445 | } |
| 446 | table_size = ftell(f); |
| 447 | fseek(f, 0, SEEK_SET); |
| 448 | |
| 449 | if (table_size > 4 * 1024 * 1024) { |
| 450 | err(".table too large\n"); |
| 451 | goto fail_table_io; |
| 452 | } |
| 453 | |
| 454 | cd_index_len = table_size / tabentry_size; |
| 455 | |
| 456 | cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0])); |
| 457 | if (cd_index_table == NULL) |
| 458 | goto fail_table_io; |
| 459 | |
| 460 | switch (cd_compression) { |
| 461 | case CDRC_ZLIB: |
| 462 | // a Z.table file is binary where each element represents |
| 463 | // one compressed frame. |
| 464 | // 4 bytes: the offset of the frame in the .Z file |
| 465 | // 2 bytes: the length of the compressed frame |
| 466 | // .znx.table has 4 additional bytes (xa header??) |
| 467 | u.znxtab_entry.dontcare = 0; |
| 468 | for (i = 0; i < cd_index_len; i++) { |
| 469 | ret = fread(&u, 1, tabentry_size, f); |
| 470 | if (ret != tabentry_size) { |
| 471 | err(".table read failed on entry %d/%d\n", i, cd_index_len); |
| 472 | goto fail_table_io_read; |
| 473 | } |
| 474 | cd_index_table[i] = u.ztab_entry.offset; |
| 475 | //if (u.znxtab_entry.dontcare != 0) |
| 476 | // printf("znx %08x!\n", u.znxtab_entry.dontcare); |
| 477 | } |
| 478 | // fake entry, so that we know last compressed block size |
| 479 | cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size; |
| 480 | cd_sectors_per_blk = 1; |
| 481 | break; |
| 482 | case CDRC_BZ: |
| 483 | // the .BZ.table file is arranged so that one entry represents |
| 484 | // 10 compressed frames. Each element is a 4 byte unsigned integer |
| 485 | // representing the offset in the .BZ file. Last entry is the size |
| 486 | // of the compressed file. |
| 487 | for (i = 0; i < cd_index_len; i++) { |
| 488 | ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f); |
| 489 | if (ret != sizeof(u.bztab_entry)) { |
| 490 | err(".table read failed on entry %d/%d\n", i, cd_index_len); |
| 491 | goto fail_table_io_read; |
| 492 | } |
| 493 | cd_index_table[i] = u.bztab_entry; |
| 494 | } |
| 495 | cd_sectors_per_blk = 10; |
| 496 | break; |
| 497 | } |
| 498 | |
| 499 | cd_file = fopen(cd_fname, "rb"); |
| 500 | if (cd_file == NULL) { |
| 501 | err("failed to open: %s: ", table_fname); |
| 502 | perror(NULL); |
| 503 | goto fail_img; |
| 504 | } |
| 505 | fclose(f); |
| 506 | |
| 507 | printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname); |
| 508 | |
| 509 | return 0; |
| 510 | |
| 511 | fail_img: |
| 512 | fail_table_io_read: |
| 513 | free(cd_index_table); |
| 514 | cd_index_table = NULL; |
| 515 | fail_table_io: |
| 516 | fclose(f); |
| 517 | return -1; |
| 518 | } |
| 519 | |
| 520 | #define FUNC(n) { #n, n } |
| 521 | |
| 522 | static const struct { |
| 523 | const char *name; |
| 524 | void *func; |
| 525 | } plugin_funcs[] = { |
| 526 | /* CDR */ |
| 527 | FUNC(CDRinit), |
| 528 | FUNC(CDRshutdown), |
| 529 | FUNC(CDRopen), |
| 530 | FUNC(CDRclose), |
| 531 | FUNC(CDRgetTN), |
| 532 | FUNC(CDRgetTD), |
| 533 | FUNC(CDRreadTrack), |
| 534 | FUNC(CDRgetBuffer), |
| 535 | FUNC(CDRgetBufferSub), |
| 536 | FUNC(CDRplay), |
| 537 | FUNC(CDRstop), |
| 538 | FUNC(CDRgetStatus), |
| 539 | }; |
| 540 | |
| 541 | void cdrcimg_set_fname(const char *fname) |
| 542 | { |
| 543 | cd_fname = fname; |
| 544 | } |
| 545 | |
| 546 | void *cdrcimg_get_sym(const char *sym) |
| 547 | { |
| 548 | int i; |
| 549 | for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++) |
| 550 | if (strcmp(plugin_funcs[i].name, sym) == 0) |
| 551 | return plugin_funcs[i].func; |
| 552 | return NULL; |
| 553 | } |
| 554 | |