| 1 | /* |
| 2 | * Copyright (c) 2010, Wei Mingzhi <whistler@openoffice.org>. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * Based on: Cdrom for Psemu Pro like Emulators |
| 6 | * By: linuzappz <linuzappz@hotmail.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify |
| 9 | * it under the terms of the GNU General Public License as published by |
| 10 | * the Free Software Foundation; either version 2 of the License, or |
| 11 | * (at your option) any later version. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program; if not, see <http://www.gnu.org/licenses>. |
| 20 | */ |
| 21 | |
| 22 | #include "cdr.h" |
| 23 | |
| 24 | #ifndef USE_NULL |
| 25 | static char *LibName = N_("CD-ROM Drive Reader"); |
| 26 | #else |
| 27 | static char *LibName = N_("CDR NULL Plugin"); |
| 28 | #endif |
| 29 | |
| 30 | int initial_time = 0; |
| 31 | |
| 32 | pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; |
| 33 | pthread_cond_t cond = PTHREAD_COND_INITIALIZER; |
| 34 | |
| 35 | CacheData *cdcache; |
| 36 | unsigned char *cdbuffer; |
| 37 | int cacheaddr; |
| 38 | |
| 39 | crdata cr; |
| 40 | |
| 41 | unsigned char lastTime[3]; |
| 42 | pthread_t thread; |
| 43 | int subqread; |
| 44 | volatile int stopth, found, locked, playing; |
| 45 | |
| 46 | long (*ReadTrackT[])() = { |
| 47 | ReadNormal, |
| 48 | ReadThreaded, |
| 49 | }; |
| 50 | |
| 51 | unsigned char* (*GetBufferT[])() = { |
| 52 | GetBNormal, |
| 53 | GetBThreaded, |
| 54 | }; |
| 55 | |
| 56 | long (*fReadTrack)(); |
| 57 | unsigned char* (*fGetBuffer)(); |
| 58 | |
| 59 | void *CdrThread(void *arg); |
| 60 | |
| 61 | long CDRinit(void) { |
| 62 | thread = (pthread_t)-1; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | long CDRshutdown(void) { |
| 67 | return 0; |
| 68 | } |
| 69 | |
| 70 | long CDRopen(void) { |
| 71 | LoadConf(); |
| 72 | |
| 73 | #ifndef _MACOSX |
| 74 | if (IsCdHandleOpen()) |
| 75 | return 0; // it's already open |
| 76 | #endif |
| 77 | |
| 78 | if (OpenCdHandle(CdromDev) == -1) { // if we can't open the cdrom we'll works as a null plugin |
| 79 | fprintf(stderr, "CDR: Could not open %s\n", CdromDev); |
| 80 | } |
| 81 | |
| 82 | fReadTrack = ReadTrackT[ReadMode]; |
| 83 | fGetBuffer = GetBufferT[ReadMode]; |
| 84 | |
| 85 | if (ReadMode == THREADED) { |
| 86 | cdcache = (CacheData *)malloc(CacheSize * sizeof(CacheData)); |
| 87 | if (cdcache == NULL) return -1; |
| 88 | memset(cdcache, 0, CacheSize * sizeof(CacheData)); |
| 89 | |
| 90 | found = 0; |
| 91 | } else { |
| 92 | cdbuffer = cr.buf + 12; /* skip sync data */ |
| 93 | } |
| 94 | |
| 95 | if (ReadMode == THREADED) { |
| 96 | pthread_attr_t attr; |
| 97 | |
| 98 | pthread_mutex_init(&mut, NULL); |
| 99 | pthread_cond_init(&cond, NULL); |
| 100 | locked = 0; |
| 101 | |
| 102 | pthread_attr_init(&attr); |
| 103 | pthread_create(&thread, &attr, CdrThread, NULL); |
| 104 | |
| 105 | cacheaddr = -1; |
| 106 | } else thread = (pthread_t)-1; |
| 107 | |
| 108 | playing = 0; |
| 109 | stopth = 0; |
| 110 | initial_time = 0; |
| 111 | |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | long CDRclose(void) { |
| 116 | if (!IsCdHandleOpen()) return 0; |
| 117 | |
| 118 | if (playing) CDRstop(); |
| 119 | |
| 120 | CloseCdHandle(); |
| 121 | |
| 122 | if (thread != (pthread_t)-1) { |
| 123 | if (locked == 0) { |
| 124 | stopth = 1; |
| 125 | while (locked == 0) usleep(5000); |
| 126 | } |
| 127 | |
| 128 | stopth = 2; |
| 129 | pthread_mutex_lock(&mut); |
| 130 | pthread_cond_signal(&cond); |
| 131 | pthread_mutex_unlock(&mut); |
| 132 | |
| 133 | pthread_join(thread, NULL); |
| 134 | pthread_mutex_destroy(&mut); |
| 135 | pthread_cond_destroy(&cond); |
| 136 | } |
| 137 | |
| 138 | if (ReadMode == THREADED) { |
| 139 | free(cdcache); |
| 140 | } |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | |
| 145 | // return Starting and Ending Track |
| 146 | // buffer: |
| 147 | // byte 0 - start track |
| 148 | // byte 1 - end track |
| 149 | long CDRgetTN(unsigned char *buffer) { |
| 150 | long ret; |
| 151 | |
| 152 | if (!IsCdHandleOpen()) { |
| 153 | buffer[0] = 1; |
| 154 | buffer[1] = 1; |
| 155 | return 0; |
| 156 | } |
| 157 | |
| 158 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 159 | ret = GetTN(buffer); |
| 160 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 161 | |
| 162 | return ret; |
| 163 | } |
| 164 | |
| 165 | // return Track Time |
| 166 | // buffer: |
| 167 | // byte 0 - frame |
| 168 | // byte 1 - second |
| 169 | // byte 2 - minute |
| 170 | long CDRgetTD(unsigned char track, unsigned char *buffer) { |
| 171 | long ret; |
| 172 | |
| 173 | if (!IsCdHandleOpen()) { |
| 174 | memset(buffer + 1, 0, 3); |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 179 | ret = GetTD(track, buffer); |
| 180 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 181 | |
| 182 | return ret; |
| 183 | } |
| 184 | |
| 185 | // normal reading |
| 186 | long ReadNormal() { |
| 187 | if (ReadSector(&cr) == -1) |
| 188 | return -1; |
| 189 | |
| 190 | return 0; |
| 191 | } |
| 192 | |
| 193 | unsigned char* GetBNormal() { |
| 194 | return cdbuffer; |
| 195 | } |
| 196 | |
| 197 | // threaded reading (with cache) |
| 198 | long ReadThreaded() { |
| 199 | int addr = msf_to_lba(cr.msf.cdmsf_min0, cr.msf.cdmsf_sec0, cr.msf.cdmsf_frame0); |
| 200 | int i; |
| 201 | |
| 202 | if (addr >= cacheaddr && addr < (cacheaddr + CacheSize) && cacheaddr != -1) { |
| 203 | i = addr - cacheaddr; |
| 204 | PRINTF("found %d\n", (addr - cacheaddr)); |
| 205 | cdbuffer = cdcache[i].cr.buf + 12; |
| 206 | while (btoi(cdbuffer[0]) != cr.msf.cdmsf_min0 || |
| 207 | btoi(cdbuffer[1]) != cr.msf.cdmsf_sec0 || |
| 208 | btoi(cdbuffer[2]) != cr.msf.cdmsf_frame0) { |
| 209 | if (locked == 1) { |
| 210 | if (cdcache[i].ret == 0) break; |
| 211 | return -1; |
| 212 | } |
| 213 | usleep(5000); |
| 214 | } |
| 215 | PRINTF("%x:%x:%x, %p, %p\n", cdbuffer[0], cdbuffer[1], cdbuffer[2], cdbuffer, cdcache); |
| 216 | found = 1; |
| 217 | |
| 218 | return 0; |
| 219 | } else found = 0; |
| 220 | |
| 221 | if (locked == 0) { |
| 222 | stopth = 1; |
| 223 | while (locked == 0) { usleep(5000); } |
| 224 | stopth = 0; |
| 225 | } |
| 226 | |
| 227 | // not found in cache |
| 228 | locked = 0; |
| 229 | pthread_mutex_lock(&mut); |
| 230 | pthread_cond_signal(&cond); |
| 231 | pthread_mutex_unlock(&mut); |
| 232 | |
| 233 | return 0; |
| 234 | } |
| 235 | |
| 236 | unsigned char* GetBThreaded() { |
| 237 | PRINTF("threadc %d\n", found); |
| 238 | |
| 239 | if (found == 1) return cdbuffer; |
| 240 | cdbuffer = cdcache[0].cr.buf + 12; |
| 241 | while (btoi(cdbuffer[0]) != cr.msf.cdmsf_min0 || |
| 242 | btoi(cdbuffer[1]) != cr.msf.cdmsf_sec0 || |
| 243 | btoi(cdbuffer[2]) != cr.msf.cdmsf_frame0) { |
| 244 | if (locked == 1) return NULL; |
| 245 | usleep(5000); |
| 246 | } |
| 247 | if (cdcache[0].ret == -1) return NULL; |
| 248 | |
| 249 | return cdbuffer; |
| 250 | } |
| 251 | |
| 252 | void *CdrThread(void *arg) { |
| 253 | unsigned char curTime[3]; |
| 254 | int i; |
| 255 | |
| 256 | for (;;) { |
| 257 | locked = 1; |
| 258 | pthread_mutex_lock(&mut); |
| 259 | pthread_cond_wait(&cond, &mut); |
| 260 | |
| 261 | if (stopth == 2) pthread_exit(NULL); |
| 262 | // refill the buffer |
| 263 | cacheaddr = msf_to_lba(cr.msf.cdmsf_min0, cr.msf.cdmsf_sec0, cr.msf.cdmsf_frame0); |
| 264 | |
| 265 | memcpy(curTime, &cr.msf, 3); |
| 266 | |
| 267 | PRINTF("start thc %d:%d:%d\n", curTime[0], curTime[1], curTime[2]); |
| 268 | |
| 269 | for (i = 0; i < CacheSize; i++) { |
| 270 | memcpy(&cdcache[i].cr.msf, curTime, 3); |
| 271 | PRINTF("reading %d:%d:%d\n", curTime[0], curTime[1], curTime[2]); |
| 272 | cdcache[i].ret = ReadSector(&cdcache[i].cr); |
| 273 | |
| 274 | PRINTF("readed %x:%x:%x\n", cdcache[i].cr.buf[12], cdcache[i].cr.buf[13], cdcache[i].cr.buf[14]); |
| 275 | if (cdcache[i].ret == -1) break; |
| 276 | |
| 277 | curTime[2]++; |
| 278 | if (curTime[2] == 75) { |
| 279 | curTime[2] = 0; |
| 280 | curTime[1]++; |
| 281 | if (curTime[1] == 60) { |
| 282 | curTime[1] = 0; |
| 283 | curTime[0]++; |
| 284 | } |
| 285 | } |
| 286 | |
| 287 | if (stopth) break; |
| 288 | } |
| 289 | |
| 290 | pthread_mutex_unlock(&mut); |
| 291 | } |
| 292 | |
| 293 | return NULL; |
| 294 | } |
| 295 | |
| 296 | // read track |
| 297 | // time: |
| 298 | // byte 0 - minute |
| 299 | // byte 1 - second |
| 300 | // byte 2 - frame |
| 301 | // uses bcd format |
| 302 | long CDRreadTrack(unsigned char *time) { |
| 303 | if (!IsCdHandleOpen()) { |
| 304 | memset(cr.buf, 0, DATA_SIZE); |
| 305 | return 0; |
| 306 | } |
| 307 | |
| 308 | PRINTF("CDRreadTrack %d:%d:%d\n", btoi(time[0]), btoi(time[1]), btoi(time[2])); |
| 309 | |
| 310 | if (UseSubQ) memcpy(lastTime, time, 3); |
| 311 | subqread = 0; |
| 312 | |
| 313 | cr.msf.cdmsf_min0 = btoi(time[0]); |
| 314 | cr.msf.cdmsf_sec0 = btoi(time[1]); |
| 315 | cr.msf.cdmsf_frame0 = btoi(time[2]); |
| 316 | |
| 317 | return fReadTrack(); |
| 318 | } |
| 319 | |
| 320 | // return readed track |
| 321 | unsigned char *CDRgetBuffer(void) { |
| 322 | return fGetBuffer(); |
| 323 | } |
| 324 | |
| 325 | // plays cdda audio |
| 326 | // sector: |
| 327 | // byte 0 - minute |
| 328 | // byte 1 - second |
| 329 | // byte 2 - frame |
| 330 | // does NOT uses bcd format |
| 331 | long CDRplay(unsigned char *sector) { |
| 332 | long ret; |
| 333 | |
| 334 | if (!IsCdHandleOpen()) |
| 335 | return 0; |
| 336 | |
| 337 | // If play was called with the same time as the previous call, |
| 338 | // don't restart it. Of course, if play is called with a different |
| 339 | // track, stop playing the current stream. |
| 340 | if (playing) { |
| 341 | if (msf_to_lba(sector[0], sector[1], sector[2]) == initial_time) |
| 342 | return 0; |
| 343 | else |
| 344 | CDRstop(); |
| 345 | } |
| 346 | |
| 347 | initial_time = msf_to_lba(sector[0], sector[1], sector[2]); |
| 348 | |
| 349 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 350 | ret = PlayCDDA(sector); |
| 351 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 352 | |
| 353 | if (ret == 0) { |
| 354 | playing = 1; |
| 355 | return 0; |
| 356 | } |
| 357 | |
| 358 | return -1; |
| 359 | } |
| 360 | |
| 361 | // stops cdda audio |
| 362 | long CDRstop(void) { |
| 363 | long ret; |
| 364 | |
| 365 | if (!IsCdHandleOpen()) |
| 366 | return 0; |
| 367 | |
| 368 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 369 | ret = StopCDDA(); |
| 370 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 371 | |
| 372 | if (ret == 0) { |
| 373 | playing = 0; |
| 374 | initial_time = 0; |
| 375 | |
| 376 | return 0; |
| 377 | } |
| 378 | |
| 379 | return -1; |
| 380 | } |
| 381 | |
| 382 | // reads cdr status |
| 383 | // type: |
| 384 | // 0x00 - unknown |
| 385 | // 0x01 - data |
| 386 | // 0x02 - audio |
| 387 | // 0xff - no cdrom |
| 388 | // status: (only shell open supported) |
| 389 | // 0x00 - unknown |
| 390 | // 0x01 - error |
| 391 | // 0x04 - seek error |
| 392 | // 0x10 - shell open |
| 393 | // 0x20 - reading |
| 394 | // 0x40 - seeking |
| 395 | // 0x80 - playing |
| 396 | // time: |
| 397 | // byte 0 - minute |
| 398 | // byte 1 - second |
| 399 | // byte 2 - frame |
| 400 | |
| 401 | long CDRgetStatus(struct CdrStat *stat) { |
| 402 | long ret; |
| 403 | |
| 404 | if (!IsCdHandleOpen()) |
| 405 | return -1; |
| 406 | |
| 407 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 408 | ret = GetStatus(playing, stat); |
| 409 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 410 | |
| 411 | return ret; |
| 412 | } |
| 413 | |
| 414 | unsigned char *CDRgetBufferSub(void) { |
| 415 | static unsigned char *p = NULL; |
| 416 | |
| 417 | if (!UseSubQ) return NULL; |
| 418 | if (subqread) return p; |
| 419 | |
| 420 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 421 | p = ReadSub(lastTime); |
| 422 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 423 | |
| 424 | if (p != NULL) subqread = 1; |
| 425 | |
| 426 | return p; |
| 427 | } |
| 428 | |
| 429 | // read CDDA sector into buffer |
| 430 | long CDRreadCDDA(unsigned char m, unsigned char s, unsigned char f, unsigned char *buffer) { |
| 431 | unsigned char msf[3] = {m, s, f}; |
| 432 | unsigned char *p; |
| 433 | |
| 434 | if (CDRreadTrack(msf) != 0) return -1; |
| 435 | |
| 436 | p = CDRgetBuffer(); |
| 437 | if (p == NULL) return -1; |
| 438 | |
| 439 | memcpy(buffer, p - 12, CD_FRAMESIZE_RAW); // copy from the beginning of the sector |
| 440 | return 0; |
| 441 | } |
| 442 | |
| 443 | // get Track End Time |
| 444 | long CDRgetTE(unsigned char track, unsigned char *m, unsigned char *s, unsigned char *f) { |
| 445 | long ret; |
| 446 | |
| 447 | if (!IsCdHandleOpen()) return -1; |
| 448 | |
| 449 | if (ReadMode == THREADED) pthread_mutex_lock(&mut); |
| 450 | ret = GetTE(track, m, s, f); |
| 451 | if (ReadMode == THREADED) pthread_mutex_unlock(&mut); |
| 452 | |
| 453 | return ret; |
| 454 | } |
| 455 | |
| 456 | #ifndef _MACOSX |
| 457 | |
| 458 | void ExecCfg(char *arg) { |
| 459 | char cfg[256]; |
| 460 | struct stat buf; |
| 461 | |
| 462 | strcpy(cfg, "./cfgDFCdrom"); |
| 463 | if (stat(cfg, &buf) != -1) { |
| 464 | if (fork() == 0) { |
| 465 | execl(cfg, "cfgDFCdrom", arg, NULL); |
| 466 | exit(0); |
| 467 | } |
| 468 | return; |
| 469 | } |
| 470 | |
| 471 | strcpy(cfg, "./cfg/DFCdrom"); |
| 472 | if (stat(cfg, &buf) != -1) { |
| 473 | if (fork() == 0) { |
| 474 | execl(cfg, "cfgDFCdrom", arg, NULL); |
| 475 | exit(0); |
| 476 | } |
| 477 | return; |
| 478 | } |
| 479 | |
| 480 | fprintf(stderr, "cfgDFCdrom file not found!\n"); |
| 481 | } |
| 482 | |
| 483 | long CDRconfigure() { |
| 484 | #ifndef USE_NULL |
| 485 | ExecCfg("configure"); |
| 486 | #endif |
| 487 | return 0; |
| 488 | } |
| 489 | |
| 490 | void CDRabout() { |
| 491 | ExecCfg("about"); |
| 492 | } |
| 493 | |
| 494 | #endif |
| 495 | |
| 496 | long CDRtest(void) { |
| 497 | #ifndef USE_NULL |
| 498 | if (OpenCdHandle(CdromDev) == -1) |
| 499 | return -1; |
| 500 | CloseCdHandle(); |
| 501 | #endif |
| 502 | return 0; |
| 503 | } |
| 504 | |
| 505 | char *PSEgetLibName(void) { |
| 506 | return _(LibName); |
| 507 | } |
| 508 | |
| 509 | unsigned long PSEgetLibType(void) { |
| 510 | return PSE_LT_CDR; |
| 511 | } |
| 512 | |
| 513 | unsigned long PSEgetLibVersion(void) { |
| 514 | return 1 << 16; |
| 515 | } |