| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | This library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | #ifdef SDL_CDROM_QNX |
| 25 | |
| 26 | /* Functions for system-level CD-ROM audio control */ |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <sys/ioctl.h> |
| 31 | #include <fcntl.h> |
| 32 | #include <errno.h> |
| 33 | #include <unistd.h> |
| 34 | #include <sys/cdrom.h> |
| 35 | #include <sys/dcmd_cam.h> |
| 36 | |
| 37 | #include "SDL_timer.h" |
| 38 | #include "SDL_cdrom.h" |
| 39 | #include "../SDL_syscdrom.h" |
| 40 | |
| 41 | /* The maximum number of CD-ROM drives we'll detect */ |
| 42 | #define MAX_DRIVES 16 |
| 43 | |
| 44 | #define QNX_CD_OPENMODE O_RDONLY | O_EXCL |
| 45 | |
| 46 | /* A list of available CD-ROM drives */ |
| 47 | static char *SDL_cdlist[MAX_DRIVES]; |
| 48 | static dev_t SDL_cdmode[MAX_DRIVES]; |
| 49 | static int SDL_cdopen[MAX_DRIVES]; |
| 50 | |
| 51 | /* The system-dependent CD control functions */ |
| 52 | static const char *SDL_SYS_CDName(int drive); |
| 53 | static int SDL_SYS_CDOpen(int drive); |
| 54 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
| 55 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
| 56 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
| 57 | static int SDL_SYS_CDPause(SDL_CD *cdrom); |
| 58 | static int SDL_SYS_CDResume(SDL_CD *cdrom); |
| 59 | static int SDL_SYS_CDStop(SDL_CD *cdrom); |
| 60 | static int SDL_SYS_CDEject(SDL_CD *cdrom); |
| 61 | static void SDL_SYS_CDClose(SDL_CD *cdrom); |
| 62 | |
| 63 | /* Check a drive to see if it is a CD-ROM */ |
| 64 | static int CheckDrive(char *drive, struct stat *stbuf) |
| 65 | { |
| 66 | int is_cd, cdfd; |
| 67 | cam_devinfo_t dinfo; |
| 68 | int devctlret=0; |
| 69 | |
| 70 | int atapi; |
| 71 | int removable; |
| 72 | int cdb10; |
| 73 | |
| 74 | /* If it doesn't exist, return -1 */ |
| 75 | if (stat(drive, stbuf) < 0) |
| 76 | { |
| 77 | return(-1); |
| 78 | } |
| 79 | |
| 80 | /* If it does exist, verify that it's an available CD-ROM */ |
| 81 | is_cd = 0; |
| 82 | |
| 83 | if (S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode)) |
| 84 | { |
| 85 | cdfd = open(drive, QNX_CD_OPENMODE); |
| 86 | if ( cdfd >= 0 ) |
| 87 | { |
| 88 | devctlret=devctl(cdfd, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
| 89 | |
| 90 | if (devctlret==EOK) |
| 91 | { |
| 92 | atapi=dinfo.flags & DEV_ATAPI; |
| 93 | removable=dinfo.flags & DEV_REMOVABLE; |
| 94 | cdb10=dinfo.flags & DEV_CDB_10; /* I'm not sure about that flag */ |
| 95 | |
| 96 | /* in the near future need to add more checks for splitting cdroms from other devices */ |
| 97 | if ((atapi)&&(removable)) |
| 98 | { |
| 99 | is_cd = 1; |
| 100 | } |
| 101 | } |
| 102 | |
| 103 | close(cdfd); |
| 104 | } |
| 105 | } |
| 106 | return(is_cd); |
| 107 | } |
| 108 | |
| 109 | /* Add a CD-ROM drive to our list of valid drives */ |
| 110 | static void AddDrive(char *drive, struct stat *stbuf) |
| 111 | { |
| 112 | int i; |
| 113 | |
| 114 | if (SDL_numcds < MAX_DRIVES) |
| 115 | { |
| 116 | /* Check to make sure it's not already in our list. |
| 117 | This can happen when we see a drive via symbolic link. */ |
| 118 | |
| 119 | for (i=0; i<SDL_numcds; ++i) |
| 120 | { |
| 121 | if (stbuf->st_rdev == SDL_cdmode[i]) |
| 122 | { |
| 123 | return; |
| 124 | } |
| 125 | } |
| 126 | |
| 127 | /* Add this drive to our list */ |
| 128 | |
| 129 | i = SDL_numcds; |
| 130 | SDL_cdlist[i] = SDL_strdup(drive); |
| 131 | if (SDL_cdlist[i] == NULL) |
| 132 | { |
| 133 | SDL_OutOfMemory(); |
| 134 | return; |
| 135 | } |
| 136 | SDL_cdmode[i] = stbuf->st_rdev; |
| 137 | ++SDL_numcds; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | int SDL_SYS_CDInit(void) |
| 142 | { |
| 143 | /* checklist: /dev/cdrom, /dev/cd?, /dev/scd? */ |
| 144 | static char *checklist[]={"cdrom", "?0 cd?", "?1 cd?", "?0 scd?", NULL}; |
| 145 | |
| 146 | char *SDLcdrom; |
| 147 | int i, j, exists; |
| 148 | char drive[32]; |
| 149 | struct stat stbuf; |
| 150 | |
| 151 | /* Fill in our driver capabilities */ |
| 152 | SDL_CDcaps.Name = SDL_SYS_CDName; |
| 153 | SDL_CDcaps.Open = SDL_SYS_CDOpen; |
| 154 | SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
| 155 | SDL_CDcaps.Status = SDL_SYS_CDStatus; |
| 156 | SDL_CDcaps.Play = SDL_SYS_CDPlay; |
| 157 | SDL_CDcaps.Pause = SDL_SYS_CDPause; |
| 158 | SDL_CDcaps.Resume = SDL_SYS_CDResume; |
| 159 | SDL_CDcaps.Stop = SDL_SYS_CDStop; |
| 160 | SDL_CDcaps.Eject = SDL_SYS_CDEject; |
| 161 | SDL_CDcaps.Close = SDL_SYS_CDClose; |
| 162 | |
| 163 | /* clearing device open status */ |
| 164 | for (i=0; i<MAX_DRIVES; i++) |
| 165 | { |
| 166 | SDL_cdopen[i]=0; |
| 167 | } |
| 168 | |
| 169 | /* Look in the environment for our CD-ROM drive list */ |
| 170 | SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
| 171 | if ( SDLcdrom != NULL ) |
| 172 | { |
| 173 | char *cdpath, *delim; |
| 174 | size_t len = SDL_strlen(SDLcdrom)+1; |
| 175 | cdpath = SDL_stack_alloc(char, len); |
| 176 | if (cdpath != NULL) |
| 177 | { |
| 178 | SDL_strlcpy(cdpath, SDLcdrom, len); |
| 179 | SDLcdrom = cdpath; |
| 180 | do { |
| 181 | delim = SDL_strchr(SDLcdrom, ':'); |
| 182 | if (delim) |
| 183 | { |
| 184 | *delim++ = '\0'; |
| 185 | } |
| 186 | if (CheckDrive(SDLcdrom, &stbuf) > 0) |
| 187 | { |
| 188 | AddDrive(SDLcdrom, &stbuf); |
| 189 | } |
| 190 | if (delim) |
| 191 | { |
| 192 | SDLcdrom = delim; |
| 193 | } |
| 194 | else |
| 195 | { |
| 196 | SDLcdrom = NULL; |
| 197 | } |
| 198 | } while (SDLcdrom); |
| 199 | SDL_stack_free(cdpath); |
| 200 | } |
| 201 | |
| 202 | /* If we found our drives, there's nothing left to do */ |
| 203 | if (SDL_numcds > 0) |
| 204 | { |
| 205 | return(0); |
| 206 | } |
| 207 | } |
| 208 | |
| 209 | /* Scan the system for CD-ROM drives */ |
| 210 | for ( i=0; checklist[i]; ++i ) |
| 211 | { |
| 212 | if (checklist[i][0] == '?') |
| 213 | { |
| 214 | char* insert; |
| 215 | exists = 1; |
| 216 | |
| 217 | for ( j=checklist[i][1]; exists; ++j ) |
| 218 | { |
| 219 | SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
| 220 | insert = SDL_strchr(drive, '?'); |
| 221 | if (insert != NULL) |
| 222 | { |
| 223 | *insert = j; |
| 224 | } |
| 225 | switch (CheckDrive(drive, &stbuf)) |
| 226 | { |
| 227 | /* Drive exists and is a CD-ROM */ |
| 228 | case 1: |
| 229 | AddDrive(drive, &stbuf); |
| 230 | break; |
| 231 | /* Drive exists, but isn't a CD-ROM */ |
| 232 | case 0: |
| 233 | break; |
| 234 | /* Drive doesn't exist */ |
| 235 | case -1: |
| 236 | exists = 0; |
| 237 | break; |
| 238 | } |
| 239 | } |
| 240 | } |
| 241 | else |
| 242 | { |
| 243 | SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
| 244 | if (CheckDrive(drive, &stbuf) > 0) |
| 245 | { |
| 246 | AddDrive(drive, &stbuf); |
| 247 | } |
| 248 | } |
| 249 | } |
| 250 | return(0); |
| 251 | } |
| 252 | |
| 253 | static const char *SDL_SYS_CDName(int drive) |
| 254 | { |
| 255 | return(SDL_cdlist[drive]); |
| 256 | } |
| 257 | |
| 258 | static int SDL_SYS_CDOpen(int drive) |
| 259 | { |
| 260 | int handle; |
| 261 | |
| 262 | handle=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
| 263 | |
| 264 | if (handle>0) |
| 265 | { |
| 266 | SDL_cdopen[drive]=handle; |
| 267 | } |
| 268 | |
| 269 | return (handle); |
| 270 | } |
| 271 | |
| 272 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
| 273 | { |
| 274 | cdrom_read_toc_t toc; |
| 275 | int i, okay; |
| 276 | |
| 277 | okay = 0; |
| 278 | if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL) == 0) |
| 279 | { |
| 280 | cdrom->numtracks = toc.last_track - toc.first_track + 1; |
| 281 | if (cdrom->numtracks > SDL_MAX_TRACKS) |
| 282 | { |
| 283 | cdrom->numtracks = SDL_MAX_TRACKS; |
| 284 | } |
| 285 | /* Read all the track TOC entries */ |
| 286 | for (i=0; i<=cdrom->numtracks; ++i) |
| 287 | { |
| 288 | if (i == cdrom->numtracks) |
| 289 | { |
| 290 | cdrom->track[i].id = CDROM_LEADOUT; |
| 291 | } |
| 292 | else |
| 293 | { |
| 294 | cdrom->track[i].id = toc.first_track+i; |
| 295 | } |
| 296 | |
| 297 | cdrom->track[i].type = toc.toc_entry[i].control_adr & 0x0F; |
| 298 | cdrom->track[i].offset = toc.toc_entry[i].addr.lba; |
| 299 | cdrom->track[i].length = 0; |
| 300 | |
| 301 | if (i > 0) |
| 302 | { |
| 303 | cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset; |
| 304 | } |
| 305 | } |
| 306 | if (i == (cdrom->numtracks+1)) |
| 307 | { |
| 308 | okay = 1; |
| 309 | } |
| 310 | } |
| 311 | return (okay ? 0 : -1); |
| 312 | } |
| 313 | |
| 314 | /* Get CD-ROM status */ |
| 315 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
| 316 | { |
| 317 | CDstatus status; |
| 318 | |
| 319 | cdrom_read_toc_t toc; |
| 320 | cdrom_subch_data_t info; |
| 321 | cam_devinfo_t dinfo; |
| 322 | |
| 323 | int devctlret=0; |
| 324 | int drive=-1; |
| 325 | int i; |
| 326 | int eagaincnt=0; |
| 327 | |
| 328 | /* check media presence before read subchannel call, some cdroms can lockups */ |
| 329 | /* if no media, while calling read subchannel functions. */ |
| 330 | devctlret=devctl(cdrom->id, DCMD_CAM_DEVINFO, &dinfo, sizeof(cam_devinfo_t), NULL); |
| 331 | |
| 332 | if (devctlret==EOK) |
| 333 | { |
| 334 | if ((dinfo.flags & DEV_NO_MEDIA)!=0) |
| 335 | { |
| 336 | status = CD_TRAYEMPTY; |
| 337 | if (position) |
| 338 | { |
| 339 | *position = 0; |
| 340 | } |
| 341 | return (status); |
| 342 | } |
| 343 | } |
| 344 | |
| 345 | /* if media exists, then do other stuff */ |
| 346 | |
| 347 | SDL_memset(&info, 0x00, sizeof(info)); |
| 348 | info.subch_command.data_format = CDROM_SUBCH_CURRENT_POSITION; |
| 349 | |
| 350 | do { |
| 351 | devctlret=devctl(cdrom->id, DCMD_CAM_CDROMSUBCHNL, &info, sizeof(info), NULL); |
| 352 | if (devctlret==EIO) |
| 353 | { |
| 354 | /* big workaround for media change, handle is unusable after that, |
| 355 | that bug was found in QNX 6.2, 6.2.1 is not released yet. */ |
| 356 | |
| 357 | for (i=0; i<MAX_DRIVES; i++) |
| 358 | { |
| 359 | if (SDL_cdopen[i]==cdrom->id) |
| 360 | { |
| 361 | drive=i; |
| 362 | break; |
| 363 | } |
| 364 | } |
| 365 | if (drive==-1) |
| 366 | { |
| 367 | /* that cannot happen, but ... */ |
| 368 | break; |
| 369 | } |
| 370 | close(cdrom->id); |
| 371 | cdrom->id=open(SDL_cdlist[drive], QNX_CD_OPENMODE); |
| 372 | devctlret=EAGAIN; |
| 373 | } |
| 374 | if (devctlret==EAGAIN) |
| 375 | { |
| 376 | eagaincnt++; |
| 377 | } |
| 378 | if (eagaincnt==2) |
| 379 | { |
| 380 | /* workaround for broken cdroms, which can return always EAGAIN when its not ready, */ |
| 381 | /* that mean errornous media or just no media avail */ |
| 382 | devctlret=ENXIO; |
| 383 | break; |
| 384 | } |
| 385 | } while ((devctlret==EAGAIN)||(devctlret==ESTALE)); |
| 386 | |
| 387 | if (devctlret != 0) |
| 388 | { |
| 389 | if (devctlret==ENXIO) |
| 390 | { |
| 391 | status = CD_TRAYEMPTY; |
| 392 | } |
| 393 | else |
| 394 | { |
| 395 | status = CD_ERROR; |
| 396 | } |
| 397 | } |
| 398 | else |
| 399 | { |
| 400 | switch (info.current_position.header.audio_status) |
| 401 | { |
| 402 | case CDROM_AUDIO_INVALID: |
| 403 | case CDROM_AUDIO_NO_STATUS: |
| 404 | /* Try to determine if there's a CD available */ |
| 405 | if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), NULL)==0) |
| 406 | status = CD_STOPPED; |
| 407 | else |
| 408 | status = CD_TRAYEMPTY; |
| 409 | break; |
| 410 | case CDROM_AUDIO_COMPLETED: |
| 411 | status = CD_STOPPED; |
| 412 | break; |
| 413 | case CDROM_AUDIO_PLAY: |
| 414 | status = CD_PLAYING; |
| 415 | break; |
| 416 | case CDROM_AUDIO_PAUSED: |
| 417 | /* Workaround buggy CD-ROM drive */ |
| 418 | if (info.current_position.data_format == CDROM_LEADOUT) |
| 419 | { |
| 420 | status = CD_STOPPED; |
| 421 | } |
| 422 | else |
| 423 | { |
| 424 | status = CD_PAUSED; |
| 425 | } |
| 426 | break; |
| 427 | default: |
| 428 | status = CD_ERROR; |
| 429 | break; |
| 430 | } |
| 431 | } |
| 432 | |
| 433 | if (position) |
| 434 | { |
| 435 | if (status==CD_PLAYING || (status==CD_PAUSED)) |
| 436 | { |
| 437 | *position = MSF_TO_FRAMES(info.current_position.addr.msf.minute, |
| 438 | info.current_position.addr.msf.second, |
| 439 | info.current_position.addr.msf.frame); |
| 440 | } |
| 441 | else |
| 442 | { |
| 443 | *position = 0; |
| 444 | } |
| 445 | } |
| 446 | |
| 447 | return (status); |
| 448 | } |
| 449 | |
| 450 | /* Start play */ |
| 451 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
| 452 | { |
| 453 | cdrom_playmsf_t playtime; |
| 454 | |
| 455 | FRAMES_TO_MSF(start, &playtime.start_minute, &playtime.start_second, &playtime.start_frame); |
| 456 | FRAMES_TO_MSF(start+length, &playtime.end_minute, &playtime.end_second, &playtime.end_frame); |
| 457 | |
| 458 | if (devctl(cdrom->id, DCMD_CAM_CDROMPLAYMSF, &playtime, sizeof(playtime), NULL) != 0) |
| 459 | { |
| 460 | return -1; |
| 461 | } |
| 462 | else |
| 463 | { |
| 464 | return 0; |
| 465 | } |
| 466 | } |
| 467 | |
| 468 | /* Pause play */ |
| 469 | static int SDL_SYS_CDPause(SDL_CD *cdrom) |
| 470 | { |
| 471 | if (devctl(cdrom->id, DCMD_CAM_CDROMPAUSE, NULL, 0, NULL)!=0) |
| 472 | { |
| 473 | return -1; |
| 474 | } |
| 475 | else |
| 476 | { |
| 477 | return 0; |
| 478 | } |
| 479 | } |
| 480 | |
| 481 | /* Resume play */ |
| 482 | static int SDL_SYS_CDResume(SDL_CD *cdrom) |
| 483 | { |
| 484 | if (devctl(cdrom->id, DCMD_CAM_CDROMRESUME, NULL, 0, NULL)!=0) |
| 485 | { |
| 486 | return -1; |
| 487 | } |
| 488 | else |
| 489 | { |
| 490 | return 0; |
| 491 | } |
| 492 | } |
| 493 | |
| 494 | /* Stop play */ |
| 495 | static int SDL_SYS_CDStop(SDL_CD *cdrom) |
| 496 | { |
| 497 | if (devctl(cdrom->id, DCMD_CAM_CDROMSTOP, NULL, 0, NULL)!=0) |
| 498 | { |
| 499 | return -1; |
| 500 | } |
| 501 | else |
| 502 | { |
| 503 | return 0; |
| 504 | } |
| 505 | } |
| 506 | |
| 507 | /* Eject the CD-ROM */ |
| 508 | static int SDL_SYS_CDEject(SDL_CD *cdrom) |
| 509 | { |
| 510 | if (devctl(cdrom->id, DCMD_CAM_EJECT_MEDIA, NULL, 0, NULL)!=0) |
| 511 | { |
| 512 | return -1; |
| 513 | } |
| 514 | else |
| 515 | { |
| 516 | return 0; |
| 517 | } |
| 518 | } |
| 519 | |
| 520 | /* Close the CD-ROM handle */ |
| 521 | static void SDL_SYS_CDClose(SDL_CD *cdrom) |
| 522 | { |
| 523 | int i; |
| 524 | |
| 525 | for (i=0; i<MAX_DRIVES; i++) |
| 526 | { |
| 527 | if (SDL_cdopen[i]==cdrom->id) |
| 528 | { |
| 529 | SDL_cdopen[i]=0; |
| 530 | break; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | close(cdrom->id); |
| 535 | } |
| 536 | |
| 537 | void SDL_SYS_CDQuit(void) |
| 538 | { |
| 539 | int i; |
| 540 | |
| 541 | if (SDL_numcds > 0) |
| 542 | { |
| 543 | for (i=0; i<SDL_numcds; ++i) |
| 544 | { |
| 545 | SDL_free(SDL_cdlist[i]); |
| 546 | } |
| 547 | SDL_numcds = 0; |
| 548 | } |
| 549 | } |
| 550 | |
| 551 | #endif /* SDL_CDROM_QNX */ |