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.
20 #define PFX "cdrcimg: "
21 #define err(f, ...) fprintf(stderr, PFX f, ##__VA_ARGS__)
23 #define CD_FRAMESIZE_RAW 2352
31 static const char *cd_fname;
32 static unsigned int *cd_index_table;
33 static unsigned int cd_index_len;
34 static unsigned int cd_sectors_per_blk;
35 static int cd_compression;
38 static int (*pBZ2_bzBuffToBuffDecompress)(char *dest, unsigned int *destLen, char *source,
39 unsigned int sourceLen, int small, int verbosity);
42 unsigned char raw[16][CD_FRAMESIZE_RAW];
43 unsigned char compressed[CD_FRAMESIZE_RAW * 16 + 100];
45 static int current_block, current_sect_in_blk;
48 extern long CDR__getStatus(struct CdrStat *stat);
54 unsigned char Time[3]; // current playing time
58 enum {DATA, CDDA} type;
59 char start[3]; // MSF-format
60 char length[3]; // MSF-format
63 #define MAXTRACKS 100 /* How many tracks can a CD hold? */
65 static int numtracks = 0;
67 #define btoi(b) ((b) / 16 * 10 + (b) % 16) /* BCD to u_char */
68 #define MSF2SECT(m, s, f) (((m) * 60 + (s) - 2) * 75 + (f))
70 // return Starting and Ending Track
72 // byte 0 - start track
74 static long CDRgetTN(unsigned char *buffer)
77 buffer[1] = numtracks > 0 ? numtracks : 1;
87 static long CDRgetTD(unsigned char track, unsigned char *buffer)
96 int uncompress2(void *out, unsigned long *out_size, void *in, unsigned long in_size)
101 if (z.zalloc == NULL) {
102 // XXX: one-time leak here..
108 ret = inflateInit2(&z, -15);
111 ret = inflateReset(&z);
116 z.avail_in = in_size;
118 z.avail_out = *out_size;
120 ret = inflate(&z, Z_NO_FLUSH);
123 *out_size -= z.avail_out;
124 return ret == 1 ? 0 : ret;
128 // time: byte 0 - minute; byte 1 - second; byte 2 - frame
130 static long CDRreadTrack(unsigned char *time)
132 unsigned int start_byte, size;
133 unsigned long cdbuffer_size;
134 int ret, sector, block;
139 sector = MSF2SECT(btoi(time[0]), btoi(time[1]), btoi(time[2]));
141 // avoid division if possible
142 switch (cd_sectors_per_blk) {
145 current_sect_in_blk = 0;
149 current_sect_in_blk = sector % 10;
153 current_sect_in_blk = sector & 15;
156 err("unhandled cd_sectors_per_blk: %d\n", cd_sectors_per_blk);
160 if (block == current_block) {
161 // it's already there, nothing to do
162 //printf("hit sect %d\n", sector);
166 if (sector >= cd_index_len * cd_sectors_per_blk) {
167 err("sector %d is past track end\n", sector);
171 start_byte = cd_index_table[block];
172 if (fseek(cd_file, start_byte, SEEK_SET) != 0) {
173 err("seek error for block %d at %x: ",
179 size = cd_index_table[block + 1] - start_byte;
180 if (size > sizeof(cdbuffer->compressed)) {
181 err("block %d is too large: %u\n", block, size);
185 if (fread(cdbuffer->compressed, 1, size, cd_file) != size) {
186 err("read error for block %d at %x: ", block, start_byte);
191 cdbuffer_size = sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk;
192 switch (cd_compression) {
194 ret = uncompress(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
197 ret = uncompress2(cdbuffer->raw[0], &cdbuffer_size, cdbuffer->compressed, size);
200 ret = pBZ2_bzBuffToBuffDecompress((char *)cdbuffer->raw, (unsigned int *)&cdbuffer_size,
201 (char *)cdbuffer->compressed, size, 0, 0);
204 err("bad cd_compression: %d\n", cd_compression);
209 err("uncompress failed with %d for block %d, sector %d\n",
213 if (cdbuffer_size != sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk)
214 err("cdbuffer_size: %lu != %d, sector %d\n", cdbuffer_size,
215 (int)sizeof(cdbuffer->raw[0]) * cd_sectors_per_blk, sector);
218 current_block = block;
223 static unsigned char *CDRgetBuffer(void)
225 return cdbuffer->raw[current_sect_in_blk] + 12;
229 // sector: byte 0 - minute; byte 1 - second; byte 2 - frame
230 // does NOT uses bcd format
231 static long CDRplay(unsigned char *time)
237 static long CDRstop(void)
242 // gets subchannel data
243 static unsigned char* CDRgetBufferSub(void)
248 static long CDRgetStatus(struct CdrStat *stat) {
249 CDR__getStatus(stat);
256 static long CDRclose(void)
258 if (cd_file != NULL) {
262 if (cd_index_table != NULL) {
263 free(cd_index_table);
264 cd_index_table = NULL;
269 static long CDRshutdown(void)
274 static long CDRinit(void)
276 if (cdbuffer == NULL) {
277 cdbuffer = malloc(sizeof(*cdbuffer));
278 if (cdbuffer == NULL) {
283 if (pBZ2_bzBuffToBuffDecompress == NULL) {
284 void *h = dlopen("/usr/lib/libbz2.so.1", RTLD_LAZY);
286 h = dlopen("./lib/libbz2.so.1", RTLD_LAZY);
288 pBZ2_bzBuffToBuffDecompress = dlsym(h, "BZ2_bzBuffToBuffDecompress");
289 if (pBZ2_bzBuffToBuffDecompress == NULL) {
290 err("dlsym bz2: %s", dlerror());
298 static long handle_eboot(void)
302 unsigned int dontcare[8];
303 unsigned int psar_offs;
308 unsigned int dontcare[6];
311 unsigned int cdimg_base;
315 f = fopen(cd_fname, "rb");
317 err("missing file: %s: ", cd_fname);
322 ret = fread(&pbp_hdr, 1, sizeof(pbp_hdr), f);
323 if (ret != sizeof(pbp_hdr)) {
324 err("failed to read pbp\n");
328 ret = fseek(f, pbp_hdr.psar_offs, SEEK_SET);
330 err("failed to seek to %x\n", pbp_hdr.psar_offs);
334 ret = fread(psar_sig, 1, sizeof(psar_sig), f);
335 if (ret != sizeof(psar_sig)) {
336 err("failed to read psar_sig\n");
341 if (strcmp(psar_sig, "PSISOIMG") != 0) {
342 err("bad psar_sig: %s\n", psar_sig);
347 ret = fseek(f, 0x4000 - sizeof(psar_sig), SEEK_CUR);
349 err("failed to seek to ISO index\n");
353 cd_index_len = (0x100000 - 0x4000) / sizeof(index_entry);
354 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
355 if (cd_index_table == NULL)
358 cdimg_base = pbp_hdr.psar_offs + 0x100000;
359 for (i = 0; i < cd_index_len; i++) {
360 ret = fread(&index_entry, 1, sizeof(index_entry), f);
361 if (ret != sizeof(index_entry)) {
362 err("failed to read index_entry #%d\n", i);
366 if (index_entry.size == 0)
369 cd_index_table[i] = cdimg_base + index_entry.offset;
371 cd_index_table[i] = cdimg_base + index_entry.offset + index_entry.size;
373 cd_compression = CDRC_ZLIB2;
374 cd_sectors_per_blk = 16;
377 printf(PFX "Loaded EBOOT CD Image: %s.\n", cd_fname);
381 free(cd_index_table);
382 cd_index_table = NULL;
388 // This function is invoked by the front-end when opening an ISO
390 static long CDRopen(void)
396 } __attribute__((packed)) ztab_entry;
400 unsigned int dontcare;
401 } __attribute__((packed)) znxtab_entry;
402 unsigned int bztab_entry;
405 char table_fname[256];
412 return 0; // it's already open
416 current_sect_in_blk = 0;
418 if (cd_fname == NULL)
421 ext = strrchr(cd_fname, '.');
425 if (strcasecmp(ext, ".pbp") == 0) {
426 return handle_eboot();
430 else if (strcasecmp(ext, ".z") == 0) {
431 cd_compression = CDRC_ZLIB;
432 tabentry_size = sizeof(u.ztab_entry);
433 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
435 else if (strcasecmp(ext, ".znx") == 0) {
436 cd_compression = CDRC_ZLIB;
437 tabentry_size = sizeof(u.znxtab_entry);
438 snprintf(table_fname, sizeof(table_fname), "%s.table", cd_fname);
440 else if (strcasecmp(ext, ".bz") == 0) {
441 if (pBZ2_bzBuffToBuffDecompress == NULL) {
442 err("libbz2 unavailable for .bz2 handling\n");
445 cd_compression = CDRC_BZ;
446 tabentry_size = sizeof(u.bztab_entry);
447 snprintf(table_fname, sizeof(table_fname), "%s.index", cd_fname);
450 err("unhandled extension: %s\n", ext);
454 f = fopen(table_fname, "rb");
456 err("missing file: %s: ", table_fname);
461 ret = fseek(f, 0, SEEK_END);
463 err("failed to seek\n");
466 table_size = ftell(f);
467 fseek(f, 0, SEEK_SET);
469 if (table_size > 4 * 1024 * 1024) {
470 err(".table too large\n");
474 cd_index_len = table_size / tabentry_size;
476 cd_index_table = malloc((cd_index_len + 1) * sizeof(cd_index_table[0]));
477 if (cd_index_table == NULL)
480 switch (cd_compression) {
482 // a Z.table file is binary where each element represents
483 // one compressed frame.
484 // 4 bytes: the offset of the frame in the .Z file
485 // 2 bytes: the length of the compressed frame
486 // .znx.table has 4 additional bytes (xa header??)
487 u.znxtab_entry.dontcare = 0;
488 for (i = 0; i < cd_index_len; i++) {
489 ret = fread(&u, 1, tabentry_size, f);
490 if (ret != tabentry_size) {
491 err(".table read failed on entry %d/%d\n", i, cd_index_len);
492 goto fail_table_io_read;
494 cd_index_table[i] = u.ztab_entry.offset;
495 //if (u.znxtab_entry.dontcare != 0)
496 // printf("znx %08x!\n", u.znxtab_entry.dontcare);
498 // fake entry, so that we know last compressed block size
499 cd_index_table[i] = u.ztab_entry.offset + u.ztab_entry.size;
500 cd_sectors_per_blk = 1;
503 // the .BZ.table file is arranged so that one entry represents
504 // 10 compressed frames. Each element is a 4 byte unsigned integer
505 // representing the offset in the .BZ file. Last entry is the size
506 // of the compressed file.
507 for (i = 0; i < cd_index_len; i++) {
508 ret = fread(&u.bztab_entry, 1, sizeof(u.bztab_entry), f);
509 if (ret != sizeof(u.bztab_entry)) {
510 err(".table read failed on entry %d/%d\n", i, cd_index_len);
511 goto fail_table_io_read;
513 cd_index_table[i] = u.bztab_entry;
515 cd_sectors_per_blk = 10;
519 cd_file = fopen(cd_fname, "rb");
520 if (cd_file == NULL) {
521 err("failed to open: %s: ", table_fname);
527 printf(PFX "Loaded compressed CD Image: %s.\n", cd_fname);
533 free(cd_index_table);
534 cd_index_table = NULL;
540 #define FUNC(n) { #n, n }
542 static const struct {
555 FUNC(CDRgetBufferSub),
561 void cdrcimg_set_fname(const char *fname)
566 void *cdrcimg_get_sym(const char *sym)
569 for (i = 0; i < sizeof(plugin_funcs) / sizeof(plugin_funcs[0]); i++)
570 if (strcmp(plugin_funcs[i].name, sym) == 0)
571 return plugin_funcs[i].func;