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 PFX "cdrcimg: "
20 #define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)
22 #define CD_FRAMESIZE_RAW 2352
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;
37 static int (*pBZ2_bzBuffToBuffDecompress)(char *dest, unsigned int *destLen, char *source,
38 unsigned int sourceLen, int small, int verbosity);
41 unsigned char raw[16][CD_FRAMESIZE_RAW];
42 unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
44 static int current_block, current_sect_in_blk;
47 extern long CDR__getStatus(struct CdrStat *stat);
53 unsigned char Time[3]; // current playing time
57 enum {DATA, CDDA} type;
58 char start[3]; // MSF-format
59 char length[3]; // MSF-format
62 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
64 static int numtracks = 0;
66 #define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
67 #define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))
69 // return Starting and Ending Track
71 // byte 0 - start track
73 static long CDRgetTN(unsigned char *buffer)
76 buffer[1] = numtracks > 0 ? numtracks : 1;
86 static long CDRgetTD(unsigned char track, unsigned char *buffer)
95 int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
100 if (z.zalloc == NULL) {
101 // XXX: one-time leak here..
107 ret = inflateInit2(&z, -15);
110 ret = inflateReset(&z);
115 z.avail_in = in_size;
117 z.avail_out = *out_size;
119 ret = inflate(&z, Z_NO_FLUSH);
122 *out_size -= z.avail_out;
123 return ret == 1 ? 0 : ret;
127 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
129 static long CDRreadTrack(unsigned char *time)
131 unsigned int start_byte, size;
132 unsigned long cdbuffer_size;
133 int ret, sector, block;
138 sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
140 // avoid division if possible
141 switch (cd_sectors_per_blk) {
144 current_sect_in_blk = 0;
148 current_sect_in_blk = sector % 10;
152 current_sect_in_blk = sector & 15;
155 err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
159 if (block == current_block) {
160 // it's already there, nothing to do
161 //printf("hit sect %d\n", sector);
165 if (sector >= cd_index_len * cd_sectors_per_blk) {
166 err("sector %d is past track end\n", sector);
170 start_byte = cd_index_table[block];
171 if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
172 err("seek error for block %d at %x: ",
178 size = cd_index_table[block + 1] - start_byte;
179 if (size > sizeof(cdbuffer->compressed)) {
180 err("block %d is too large: %u\n", block, size);
184 if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
185 err("read error for block %d at %x: ", block, start_byte);
190 cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
191 switch (cd_compression) {
193 ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
196 ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
199 ret = pBZ2_bzBuffToBuffDecompress((char *)cdbuffer->raw, (unsigned int *)&cdbuffer_size,
200 (char *)cdbuffer->compressed, size, 0, 0);
203 err("bad cd_compression: %d\n", cd_compression);
208 err("uncompress failed with %d for block %d, sector %d\n",
212 if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
213 err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
214 (int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);
217 current_block = block;
222 static unsigned char *CDRgetBuffer(void)
224 return cdbuffer->raw[current_sect_in_blk] + 12;
228 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
229 // does NOT uses bcd format
230 static long CDRplay(unsigned char *time)
236 static long CDRstop(void)
241 // gets subchannel data
242 static unsigned char* CDRgetBufferSub(void)
247 static long CDRgetStatus(struct CdrStat *stat) {
248 CDR__getStatus(stat);
255 static long CDRclose(void)
257 if (cd_file != NULL) {
261 if (cd_index_table != NULL) {
262 free(cd_index_table);
263 cd_index_table = NULL;
268 static long CDRshutdown(void)
273 static long CDRinit(void)
275 if (cdbuffer == NULL) {
276 cdbuffer = malloc(sizeof(*cdbuffer));
277 if (cdbuffer == NULL) {
282 if (pBZ2_bzBuffToBuffDecompress == NULL) {
283 void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
285 h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
287 pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
288 if (pBZ2_bzBuffToBuffDecompress == NULL) {
289 err("dlsym bz2: %s", dlerror());
297 static long handle_eboot(void)
301 unsigned int dontcare[8];
302 unsigned int psar_offs;
307 unsigned int dontcare[6];
310 unsigned int cdimg_base;
314 f = fopen(cd_fname, "rb");
316 err("missing file: %s: ", cd_fname);
321 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
322 if (ret != sizeof(pbp_hdr)) {
323 err("failed to read pbp\n");
327 ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
329 err("failed to seek to %x\n", pbp_hdr.psar_offs);
333 ret = fread(psar_sig, 1, sizeof(psar_sig), f);
334 if (ret != sizeof(psar_sig)) {
335 err("failed to read psar_sig\n");
340 if (strcmp(psar_sig, "PSISOIMG") != 0) {
341 err("bad psar_sig: %s\n", psar_sig);
346 ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
348 err("failed to seek to ISO index\n");
352 cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
353 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
354 if (cd_index_table == NULL)
357 cdimg_base = pbp_hdr.psar_offs + 0x100000;
358 for (i = 0; i < cd_index_len; i++) {
359 ret = fread(&index_entry, 1, sizeof(index_entry), f);
360 if (ret != sizeof(index_entry)) {
361 err("failed to read index_entry #%d\n", i);
365 if (index_entry.size == 0)
368 cd_index_table[i] = cdimg_base + index_entry.offset;
370 cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
372 cd_compression = CDRC_ZLIB2;
373 cd_sectors_per_blk = 16;
376 printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
380 free(cd_index_table);
381 cd_index_table = NULL;
387 // This function is invoked by the front-end when opening an ISO
389 static long CDRopen(void)
395 } __attribute__((packed)) ztab_entry;
399 unsigned int dontcare;
400 } __attribute__((packed)) znxtab_entry;
401 unsigned int bztab_entry;
404 char table_fname[256];
411 return 0; // it's already open
415 current_sect_in_blk = 0;
417 if (cd_fname == NULL)
420 ext = strrchr(cd_fname, '.');
424 if (strcasecmp(ext, ".pbp") == 0) {
425 return handle_eboot();
429 else if (strcasecmp(ext, ".z") == 0) {
430 cd_compression = CDRC_ZLIB;
431 tabentry_size = sizeof(u.ztab_entry);
432 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
434 else if (strcasecmp(ext, ".znx") == 0) {
435 cd_compression = CDRC_ZLIB;
436 tabentry_size = sizeof(u.znxtab_entry);
437 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
439 else if (strcasecmp(ext, ".bz") == 0) {
440 if (pBZ2_bzBuffToBuffDecompress == NULL) {
441 err("libbz2 unavailable for .bz2 handling\n");
444 cd_compression = CDRC_BZ;
445 tabentry_size = sizeof(u.bztab_entry);
446 snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
449 err("unhandled extension: %s\n", ext);
453 f = fopen(table_fname, "rb");
455 err("missing file: %s: ", table_fname);
460 ret = fseek(f, 0, SEEK_END);
462 err("failed to seek\n");
465 table_size = ftell(f);
466 fseek(f, 0, SEEK_SET);
468 if (table_size > 4 * 1024 * 1024) {
469 err(".table too large\n");
473 cd_index_len = table_size / tabentry_size;
475 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
476 if (cd_index_table == NULL)
479 switch (cd_compression) {
481 // a Z.table file is binary where each element represents
482 // one compressed frame.
483 // 4 bytes: the offset of the frame in the .Z file
484 // 2 bytes: the length of the compressed frame
485 // .znx.table has 4 additional bytes (xa header??)
486 u.znxtab_entry.dontcare = 0;
487 for (i = 0; i < cd_index_len; i++) {
488 ret = fread(&u, 1, tabentry_size, f);
489 if (ret != tabentry_size) {
490 err(".table read failed on entry %d/%d\n", i, cd_index_len);
491 goto fail_table_io_read;
493 cd_index_table[i] = u.ztab_entry.offset;
494 //if (u.znxtab_entry.dontcare != 0)
495 // printf("znx %08x!\n", u.znxtab_entry.dontcare);
497 // fake entry, so that we know last compressed block size
498 cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
499 cd_sectors_per_blk = 1;
502 // the .BZ.table file is arranged so that one entry represents
503 // 10 compressed frames. Each element is a 4 byte unsigned integer
504 // representing the offset in the .BZ file. Last entry is the size
505 // of the compressed file.
506 for (i = 0; i < cd_index_len; i++) {
507 ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
508 if (ret != sizeof(u.bztab_entry)) {
509 err(".table read failed on entry %d/%d\n", i, cd_index_len);
510 goto fail_table_io_read;
512 cd_index_table[i] = u.bztab_entry;
514 cd_sectors_per_blk = 10;
518 cd_file = fopen(cd_fname, "rb");
519 if (cd_file == NULL) {
520 err("failed to open: %s: ", table_fname);
526 printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);
532 free(cd_index_table);
533 cd_index_table = NULL;
539 #define FUNC(n) { #n, n }
541 static const struct {
554 FUNC(CDRgetBufferSub),
560 void cdrcimg_set_fname(const char *fname)
565 void *cdrcimg_get_sym(const char *sym)
568 for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
569 if (strcmp(plugin_funcs[i].name, sym) == 0)
570 return plugin_funcs[i].func;