2 * (C) GraÅžvydas "notaz" Ignotas, 2010
4 * This work is licensed under the terms of any of these licenses
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.
19 #define WIN32_LEAN_AND_MEAN
25 #define PFX "cdrcimg: "
26 #define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)
28 #define CD_FRAMESIZE_RAW 2352
36 static const char *cd_fname;
37 static unsigned int *cd_index_table;
38 static unsigned int cd_index_len;
39 static unsigned int cd_sectors_per_blk;
40 static int cd_compression;
43 static int (*pBZ2_bzBuffToBuffDecompress)(char *dest, unsigned int *destLen, char *source,
44 unsigned int sourceLen, int small, int verbosity);
47 unsigned char raw[16][CD_FRAMESIZE_RAW];
48 unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
50 static int current_block, current_sect_in_blk;
53 extern long CALLBACK CDR__getStatus(struct CdrStat *stat);
59 unsigned char Time[3]; // current playing time
63 enum {DATA, CDDA} type;
64 char start[3]; // MSF-format
65 char length[3]; // MSF-format
68 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
70 static int numtracks = 0;
72 #define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
73 #define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))
75 // return Starting and Ending Track
77 // byte 0 - start track
79 static long CDRgetTN(unsigned char *buffer)
82 buffer[1] = numtracks > 0 ? numtracks : 1;
92 static long CDRgetTD(unsigned char track, unsigned char *buffer)
101 int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
106 if (z.zalloc == NULL) {
107 // XXX: one-time leak here..
113 ret = inflateInit2(&z, -15);
116 ret = inflateReset(&z);
121 z.avail_in = in_size;
123 z.avail_out = *out_size;
125 ret = inflate(&z, Z_NO_FLUSH);
128 *out_size -= z.avail_out;
129 return ret == 1 ? 0 : ret;
133 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
135 static long CDRreadTrack(unsigned char *time)
137 unsigned int start_byte, size;
138 unsigned long cdbuffer_size;
139 int ret, sector, block;
144 sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
146 // avoid division if possible
147 switch (cd_sectors_per_blk) {
150 current_sect_in_blk = 0;
154 current_sect_in_blk = sector % 10;
158 current_sect_in_blk = sector & 15;
161 err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
165 if (block == current_block) {
166 // it's already there, nothing to do
167 //printf("hit sect %d\n", sector);
171 if (sector >= cd_index_len * cd_sectors_per_blk) {
172 err("sector %d is past track end\n", sector);
176 start_byte = cd_index_table[block];
177 if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
178 err("seek error for block %d at %x: ",
184 size = cd_index_table[block + 1] - start_byte;
185 if (size > sizeof(cdbuffer->compressed)) {
186 err("block %d is too large: %u\n", block, size);
190 if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
191 err("read error for block %d at %x: ", block, start_byte);
196 cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
197 switch (cd_compression) {
199 ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
202 ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
205 ret = pBZ2_bzBuffToBuffDecompress((char *)cdbuffer->raw, (unsigned int *)&cdbuffer_size,
206 (char *)cdbuffer->compressed, size, 0, 0);
209 err("bad cd_compression: %d\n", cd_compression);
214 err("uncompress failed with %d for block %d, sector %d\n",
218 if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
219 err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
220 (int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);
223 current_block = block;
228 static unsigned char *CDRgetBuffer(void)
230 return cdbuffer->raw[current_sect_in_blk] + 12;
234 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
235 // does NOT uses bcd format
236 static long CDRplay(unsigned char *time)
242 static long CDRstop(void)
247 // gets subchannel data
248 static unsigned char* CDRgetBufferSub(void)
253 static long CDRgetStatus(struct CdrStat *stat) {
254 CDR__getStatus(stat);
261 static long CDRclose(void)
263 if (cd_file != NULL) {
267 if (cd_index_table != NULL) {
268 free(cd_index_table);
269 cd_index_table = NULL;
274 static long CDRshutdown(void)
279 static long CDRinit(void)
281 if (cdbuffer == NULL) {
282 cdbuffer = malloc(sizeof(*cdbuffer));
283 if (cdbuffer == NULL) {
289 if (pBZ2_bzBuffToBuffDecompress == NULL) {
290 void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
292 h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
294 pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
295 if (pBZ2_bzBuffToBuffDecompress == NULL) {
296 err("dlsym bz2: %s", dlerror());
305 static long handle_eboot(void)
309 unsigned int dontcare[8];
310 unsigned int psar_offs;
315 unsigned int dontcare[6];
318 unsigned int cdimg_base;
322 f = fopen(cd_fname, "rb");
324 err("missing file: %s: ", cd_fname);
329 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
330 if (ret != sizeof(pbp_hdr)) {
331 err("failed to read pbp\n");
335 ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
337 err("failed to seek to %x\n", pbp_hdr.psar_offs);
341 ret = fread(psar_sig, 1, sizeof(psar_sig), f);
342 if (ret != sizeof(psar_sig)) {
343 err("failed to read psar_sig\n");
348 if (strcmp(psar_sig, "PSISOIMG") != 0) {
349 err("bad psar_sig: %s\n", psar_sig);
354 ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
356 err("failed to seek to ISO index\n");
360 cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
361 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
362 if (cd_index_table == NULL)
365 cdimg_base = pbp_hdr.psar_offs + 0x100000;
366 for (i = 0; i < cd_index_len; i++) {
367 ret = fread(&index_entry, 1, sizeof(index_entry), f);
368 if (ret != sizeof(index_entry)) {
369 err("failed to read index_entry #%d\n", i);
373 if (index_entry.size == 0)
376 cd_index_table[i] = cdimg_base + index_entry.offset;
378 cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
380 cd_compression = CDRC_ZLIB2;
381 cd_sectors_per_blk = 16;
384 printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
388 free(cd_index_table);
389 cd_index_table = NULL;
395 // This function is invoked by the front-end when opening an ISO
397 static long CDRopen(void)
403 } __attribute__((packed)) ztab_entry;
407 unsigned int dontcare;
408 } __attribute__((packed)) znxtab_entry;
409 unsigned int bztab_entry;
412 char table_fname[256];
419 return 0; // it's already open
423 current_sect_in_blk = 0;
425 if (cd_fname == NULL)
428 ext = strrchr(cd_fname, '.');
432 if (strcasecmp(ext, ".pbp") == 0) {
433 return handle_eboot();
437 else if (strcasecmp(ext, ".z") == 0) {
438 cd_compression = CDRC_ZLIB;
439 tabentry_size = sizeof(u.ztab_entry);
440 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
442 else if (strcasecmp(ext, ".znx") == 0) {
443 cd_compression = CDRC_ZLIB;
444 tabentry_size = sizeof(u.znxtab_entry);
445 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
447 else if (strcasecmp(ext, ".bz") == 0) {
448 if (pBZ2_bzBuffToBuffDecompress == NULL) {
449 err("libbz2 unavailable for .bz2 handling\n");
452 cd_compression = CDRC_BZ;
453 tabentry_size = sizeof(u.bztab_entry);
454 snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
457 err("unhandled extension: %s\n", ext);
461 f = fopen(table_fname, "rb");
463 err("missing file: %s: ", table_fname);
468 ret = fseek(f, 0, SEEK_END);
470 err("failed to seek\n");
473 table_size = ftell(f);
474 fseek(f, 0, SEEK_SET);
476 if (table_size > 4 * 1024 * 1024) {
477 err(".table too large\n");
481 cd_index_len = table_size / tabentry_size;
483 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
484 if (cd_index_table == NULL)
487 switch (cd_compression) {
489 // a Z.table file is binary where each element represents
490 // one compressed frame.
491 // 4 bytes: the offset of the frame in the .Z file
492 // 2 bytes: the length of the compressed frame
493 // .znx.table has 4 additional bytes (xa header??)
494 u.znxtab_entry.dontcare = 0;
495 for (i = 0; i < cd_index_len; i++) {
496 ret = fread(&u, 1, tabentry_size, f);
497 if (ret != tabentry_size) {
498 err(".table read failed on entry %d/%d\n", i, cd_index_len);
499 goto fail_table_io_read;
501 cd_index_table[i] = u.ztab_entry.offset;
502 //if (u.znxtab_entry.dontcare != 0)
503 // printf("znx %08x!\n", u.znxtab_entry.dontcare);
505 // fake entry, so that we know last compressed block size
506 cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
507 cd_sectors_per_blk = 1;
510 // the .BZ.table file is arranged so that one entry represents
511 // 10 compressed frames. Each element is a 4 byte unsigned integer
512 // representing the offset in the .BZ file. Last entry is the size
513 // of the compressed file.
514 for (i = 0; i < cd_index_len; i++) {
515 ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
516 if (ret != sizeof(u.bztab_entry)) {
517 err(".table read failed on entry %d/%d\n", i, cd_index_len);
518 goto fail_table_io_read;
520 cd_index_table[i] = u.bztab_entry;
522 cd_sectors_per_blk = 10;
526 cd_file = fopen(cd_fname, "rb");
527 if (cd_file == NULL) {
528 err("failed to open: %s: ", table_fname);
534 printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);
540 free(cd_index_table);
541 cd_index_table = NULL;
547 #define FUNC(n) { #n, n }
549 static const struct {
562 FUNC(CDRgetBufferSub),
568 void cdrcimg_set_fname(const char *fname)
573 void *cdrcimg_get_sym(const char *sym)
576 for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
577 if (strcmp(plugin_funcs[i].name, sym) == 0)
578 return plugin_funcs[i].func;