Mercurial > sdl-ios-xcode
annotate src/cdrom/linux/SDL_syscdrom.c @ 139:ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 09 Aug 2001 05:34:17 +0000 |
| parents | 74212992fb08 |
| children | b0f09f86378d |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga | |
| 4 | |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
| 20 slouken@devolution.com | |
| 21 */ | |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Functions for system-level CD-ROM audio control */ | |
| 29 | |
| 30 #include <sys/types.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <sys/stat.h> | |
| 33 #include <sys/ioctl.h> | |
| 34 #include <fcntl.h> | |
| 35 #include <stdio.h> | |
| 36 #include <string.h> | |
| 37 #include <errno.h> | |
| 38 #include <unistd.h> | |
| 39 #ifdef __linux__ | |
| 40 #include <linux/cdrom.h> | |
| 41 #endif | |
| 42 #ifdef __SVR4 | |
| 43 #include <sys/cdio.h> | |
| 44 #endif | |
| 45 | |
| 46 /* Define this to use the alternative getmntent() code */ | |
| 47 #ifndef __SVR4 | |
| 48 #define USE_MNTENT | |
| 49 #endif | |
| 50 | |
| 51 #ifdef USE_MNTENT | |
| 52 #if defined(__USLC__) | |
| 53 #include <sys/mntent.h> | |
| 54 #else | |
| 55 #include <mntent.h> | |
| 56 #endif | |
| 57 | |
| 58 #ifndef _PATH_MNTTAB | |
| 59 #ifdef MNTTAB | |
| 60 #define _PATH_MNTTAB MNTTAB | |
| 61 #else | |
| 62 #define _PATH_MNTTAB "/etc/fstab" | |
| 63 #endif | |
| 64 #endif /* !_PATH_MNTTAB */ | |
| 65 | |
| 66 #ifndef _PATH_MOUNTED | |
| 67 #define _PATH_MOUNTED "/etc/mtab" | |
| 68 #endif /* !_PATH_MOUNTED */ | |
| 69 | |
| 70 #ifndef MNTTYPE_CDROM | |
| 71 #define MNTTYPE_CDROM "iso9660" | |
| 72 #endif | |
| 73 #ifndef MNTTYPE_SUPER | |
| 74 #define MNTTYPE_SUPER "supermount" | |
| 75 #endif | |
| 76 #endif /* USE_MNTENT */ | |
| 77 | |
| 78 #include "SDL_error.h" | |
| 79 #include "SDL_cdrom.h" | |
| 80 #include "SDL_syscdrom.h" | |
| 81 | |
| 82 | |
| 83 /* The maximum number of CD-ROM drives we'll detect */ | |
| 84 #define MAX_DRIVES 16 | |
| 85 | |
| 86 /* A list of available CD-ROM drives */ | |
| 87 static char *SDL_cdlist[MAX_DRIVES]; | |
| 88 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 89 | |
| 90 /* The system-dependent CD control functions */ | |
| 91 static const char *SDL_SYS_CDName(int drive); | |
| 92 static int SDL_SYS_CDOpen(int drive); | |
| 93 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 94 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 95 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 96 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 97 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 98 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 99 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 100 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 101 | |
| 102 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 103 #define ERRNO_TRAYEMPTY(errno) \ | |
| 104 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) | |
| 105 | |
| 106 /* Check a drive to see if it is a CD-ROM */ | |
| 107 static int CheckDrive(char *drive, char *mnttype, struct stat *stbuf) | |
| 108 { | |
| 109 int is_cd, cdfd; | |
| 110 struct cdrom_subchnl info; | |
| 111 | |
| 112 /* If it doesn't exist, return -1 */ | |
| 113 if ( stat(drive, stbuf) < 0 ) { | |
| 114 return(-1); | |
| 115 } | |
| 116 | |
| 117 /* If it does exist, verify that it's an available CD-ROM */ | |
| 118 is_cd = 0; | |
| 119 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 120 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 121 if ( cdfd >= 0 ) { | |
| 122 info.cdsc_format = CDROM_MSF; | |
| 123 /* Under Linux, EIO occurs when a disk is not present. | |
| 124 */ | |
| 125 if ( (ioctl(cdfd, CDROMSUBCHNL, &info) == 0) || | |
| 126 ERRNO_TRAYEMPTY(errno) ) { | |
| 127 is_cd = 1; | |
| 128 } | |
| 129 close(cdfd); | |
| 130 } | |
| 131 #ifdef USE_MNTENT | |
| 132 /* Even if we can't read it, it might be mounted */ | |
| 133 else if ( mnttype && (strcmp(mnttype, MNTTYPE_CDROM) == 0) ) { | |
| 134 is_cd = 1; | |
| 135 } | |
| 136 #endif | |
| 137 } | |
| 138 return(is_cd); | |
| 139 } | |
| 140 | |
| 141 /* Add a CD-ROM drive to our list of valid drives */ | |
| 142 static void AddDrive(char *drive, struct stat *stbuf) | |
| 143 { | |
| 144 int i; | |
| 145 | |
| 146 if ( SDL_numcds < MAX_DRIVES ) { | |
| 147 /* Check to make sure it's not already in our list. | |
| 148 This can happen when we see a drive via symbolic link. | |
| 149 */ | |
| 150 for ( i=0; i<SDL_numcds; ++i ) { | |
| 151 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 152 #ifdef DEBUG_CDROM | |
| 153 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 154 #endif | |
| 155 return; | |
| 156 } | |
| 157 } | |
| 158 | |
| 159 /* Add this drive to our list */ | |
| 160 i = SDL_numcds; | |
| 161 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1); | |
| 162 if ( SDL_cdlist[i] == NULL ) { | |
| 163 SDL_OutOfMemory(); | |
| 164 return; | |
| 165 } | |
| 166 strcpy(SDL_cdlist[i], drive); | |
| 167 SDL_cdmode[i] = stbuf->st_rdev; | |
| 168 ++SDL_numcds; | |
| 169 #ifdef DEBUG_CDROM | |
| 170 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 171 #endif | |
| 172 } | |
| 173 } | |
| 174 | |
| 175 #ifdef USE_MNTENT | |
| 176 static void CheckMounts(const char *mtab) | |
| 177 { | |
| 178 FILE *mntfp; | |
| 179 struct mntent *mntent; | |
| 180 struct stat stbuf; | |
| 181 | |
| 182 mntfp = setmntent(mtab, "r"); | |
| 183 if ( mntfp != NULL ) { | |
|
139
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
184 char *tmp; |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
185 char *mnt_type; |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
186 char *mnt_dev; |
| 0 | 187 |
| 188 while ( (mntent=getmntent(mntfp)) != NULL ) { | |
|
139
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
189 mnt_type = malloc(strlen(mntent->mnt_type) + 1); |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
190 if (mnt_type == NULL) |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
191 continue; /* maybe you'll get lucky next time. */ |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
192 |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
193 mnt_dev = malloc(strlen(mntent->mnt_fsname) + 1); |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
194 if (mnt_dev == NULL) { |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
195 free(mnt_type); |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
196 continue; |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
197 } |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
198 |
| 0 | 199 strcpy(mnt_type, mntent->mnt_type); |
| 200 strcpy(mnt_dev, mntent->mnt_fsname); | |
| 201 | |
| 202 /* Handle "supermount" filesystem mounts */ | |
| 203 if ( strcmp(mnt_type, MNTTYPE_SUPER) == 0 ) { | |
| 204 tmp = strstr(mntent->mnt_opts, "fs="); | |
| 205 if ( tmp ) { | |
| 206 strcpy(mnt_type, tmp+strlen("fs=")); | |
| 207 tmp = strchr(mnt_type, ','); | |
| 208 if ( tmp ) { | |
| 209 *tmp = '\0'; | |
| 210 } | |
| 211 } | |
| 212 tmp = strstr(mntent->mnt_opts, "dev="); | |
| 213 if ( tmp ) { | |
| 214 strcpy(mnt_dev, tmp+strlen("dev=")); | |
| 215 tmp = strchr(mnt_dev, ','); | |
| 216 if ( tmp ) { | |
| 217 *tmp = '\0'; | |
| 218 } | |
| 219 } | |
| 220 } | |
| 221 if ( strcmp(mnt_type, MNTTYPE_CDROM) == 0 ) { | |
| 222 #ifdef DEBUG_CDROM | |
| 223 fprintf(stderr, "Checking mount path from %s: %s mounted on %s of %s\n", | |
| 224 mtab, mnt_dev, mntent->mnt_dir, mnt_type); | |
| 225 #endif | |
| 226 if (CheckDrive(mnt_dev, mnt_type, &stbuf) > 0) { | |
| 227 AddDrive(mnt_dev, &stbuf); | |
| 228 } | |
| 229 } | |
|
139
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
230 free(mnt_dev); |
|
ef23a1bf1244
Fixed potential buffer overflow in Linux CD code (thanks Ryan!)
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
231 free(mnt_type); |
| 0 | 232 } |
| 233 endmntent(mntfp); | |
| 234 } | |
| 235 } | |
| 236 #endif /* USE_MNTENT */ | |
| 237 | |
| 238 int SDL_SYS_CDInit(void) | |
| 239 { | |
| 240 /* checklist: /dev/cdrom, /dev/hd?, /dev/scd? /dev/sr? */ | |
| 241 static char *checklist[] = { | |
| 242 "cdrom", "?a hd?", "?0 scd?", "?0 sr?", NULL | |
| 243 }; | |
| 244 char *SDLcdrom; | |
| 245 int i, j, exists; | |
| 246 char drive[32]; | |
| 247 struct stat stbuf; | |
| 248 | |
| 249 /* Fill in our driver capabilities */ | |
| 250 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 251 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 252 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 253 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 254 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 255 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 256 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 257 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 258 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 259 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 260 | |
| 261 /* Look in the environment for our CD-ROM drive list */ | |
| 262 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */ | |
| 263 if ( SDLcdrom != NULL ) { | |
| 264 char *cdpath, *delim; | |
| 265 cdpath = malloc(strlen(SDLcdrom)+1); | |
| 266 if ( cdpath != NULL ) { | |
| 267 strcpy(cdpath, SDLcdrom); | |
| 268 SDLcdrom = cdpath; | |
| 269 do { | |
| 270 delim = strchr(SDLcdrom, ':'); | |
| 271 if ( delim ) { | |
| 272 *delim++ = '\0'; | |
| 273 } | |
| 274 #ifdef DEBUG_CDROM | |
| 275 fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom); | |
| 276 #endif | |
| 277 if ( CheckDrive(SDLcdrom, NULL, &stbuf) > 0 ) { | |
| 278 AddDrive(SDLcdrom, &stbuf); | |
| 279 } | |
| 280 if ( delim ) { | |
| 281 SDLcdrom = delim; | |
| 282 } else { | |
| 283 SDLcdrom = NULL; | |
| 284 } | |
| 285 } while ( SDLcdrom ); | |
| 286 free(cdpath); | |
| 287 } | |
| 288 | |
| 289 /* If we found our drives, there's nothing left to do */ | |
| 290 if ( SDL_numcds > 0 ) { | |
| 291 return(0); | |
| 292 } | |
| 293 } | |
| 294 | |
| 295 #ifdef USE_MNTENT | |
| 296 /* Check /dev/cdrom first :-) */ | |
| 297 if (CheckDrive("/dev/cdrom", NULL, &stbuf) > 0) { | |
| 298 AddDrive("/dev/cdrom", &stbuf); | |
| 299 } | |
| 300 | |
| 301 /* Now check the currently mounted CD drives */ | |
| 302 CheckMounts(_PATH_MOUNTED); | |
| 303 | |
| 304 /* Finally check possible mountable drives in /etc/fstab */ | |
| 305 CheckMounts(_PATH_MNTTAB); | |
| 306 | |
| 307 /* If we found our drives, there's nothing left to do */ | |
| 308 if ( SDL_numcds > 0 ) { | |
| 309 return(0); | |
| 310 } | |
| 311 #endif /* USE_MNTENT */ | |
| 312 | |
| 313 /* Scan the system for CD-ROM drives. | |
| 314 Not always 100% reliable, so use the USE_MNTENT code above first. | |
| 315 */ | |
| 316 for ( i=0; checklist[i]; ++i ) { | |
| 317 if ( checklist[i][0] == '?' ) { | |
| 318 char *insert; | |
| 319 exists = 1; | |
| 320 for ( j=checklist[i][1]; exists; ++j ) { | |
| 321 sprintf(drive, "/dev/%s", &checklist[i][3]); | |
| 322 insert = strchr(drive, '?'); | |
| 323 if ( insert != NULL ) { | |
| 324 *insert = j; | |
| 325 } | |
| 326 #ifdef DEBUG_CDROM | |
| 327 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 328 #endif | |
| 329 switch (CheckDrive(drive, NULL, &stbuf)) { | |
| 330 /* Drive exists and is a CD-ROM */ | |
| 331 case 1: | |
| 332 AddDrive(drive, &stbuf); | |
| 333 break; | |
| 334 /* Drive exists, but isn't a CD-ROM */ | |
| 335 case 0: | |
| 336 break; | |
| 337 /* Drive doesn't exist */ | |
| 338 case -1: | |
| 339 exists = 0; | |
| 340 break; | |
| 341 } | |
| 342 } | |
| 343 } else { | |
| 344 sprintf(drive, "/dev/%s", checklist[i]); | |
| 345 #ifdef DEBUG_CDROM | |
| 346 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 347 #endif | |
| 348 if ( CheckDrive(drive, NULL, &stbuf) > 0 ) { | |
| 349 AddDrive(drive, &stbuf); | |
| 350 } | |
| 351 } | |
| 352 } | |
| 353 return(0); | |
| 354 } | |
| 355 | |
| 356 /* General ioctl() CD-ROM command function */ | |
| 357 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
| 358 { | |
| 359 int retval; | |
| 360 | |
| 361 retval = ioctl(id, command, arg); | |
| 362 if ( retval < 0 ) { | |
| 363 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
| 364 } | |
| 365 return(retval); | |
| 366 } | |
| 367 | |
| 368 static const char *SDL_SYS_CDName(int drive) | |
| 369 { | |
| 370 return(SDL_cdlist[drive]); | |
| 371 } | |
| 372 | |
| 373 static int SDL_SYS_CDOpen(int drive) | |
| 374 { | |
| 375 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
| 376 } | |
| 377 | |
| 378 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 379 { | |
| 380 struct cdrom_tochdr toc; | |
| 381 int i, okay; | |
| 382 struct cdrom_tocentry entry; | |
| 383 | |
| 384 okay = 0; | |
| 385 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc) == 0 ) { | |
| 386 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1; | |
| 387 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 388 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 389 } | |
| 390 /* Read all the track TOC entries */ | |
| 391 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 392 if ( i == cdrom->numtracks ) { | |
| 393 cdrom->track[i].id = CDROM_LEADOUT; | |
| 394 } else { | |
| 395 cdrom->track[i].id = toc.cdth_trk0+i; | |
| 396 } | |
| 397 entry.cdte_track = cdrom->track[i].id; | |
| 398 entry.cdte_format = CDROM_MSF; | |
| 399 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, | |
| 400 &entry) < 0 ) { | |
| 401 break; | |
| 402 } else { | |
| 403 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) { | |
| 404 cdrom->track[i].type = SDL_DATA_TRACK; | |
| 405 } else { | |
| 406 cdrom->track[i].type = SDL_AUDIO_TRACK; | |
| 407 } | |
| 408 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 409 entry.cdte_addr.msf.minute, | |
| 410 entry.cdte_addr.msf.second, | |
| 411 entry.cdte_addr.msf.frame); | |
| 412 cdrom->track[i].length = 0; | |
| 413 if ( i > 0 ) { | |
| 414 cdrom->track[i-1].length = | |
| 415 cdrom->track[i].offset- | |
| 416 cdrom->track[i-1].offset; | |
| 417 } | |
| 418 } | |
| 419 } | |
| 420 if ( i == (cdrom->numtracks+1) ) { | |
| 421 okay = 1; | |
| 422 } | |
| 423 } | |
| 424 return(okay ? 0 : -1); | |
| 425 } | |
| 426 | |
| 427 /* Get CD-ROM status */ | |
| 428 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 429 { | |
| 430 CDstatus status; | |
| 431 struct cdrom_tochdr toc; | |
| 432 struct cdrom_subchnl info; | |
| 433 | |
| 434 info.cdsc_format = CDROM_MSF; | |
| 435 if ( ioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) { | |
| 436 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 437 status = CD_TRAYEMPTY; | |
| 438 } else { | |
| 439 status = CD_ERROR; | |
| 440 } | |
| 441 } else { | |
| 442 switch (info.cdsc_audiostatus) { | |
| 443 case CDROM_AUDIO_INVALID: | |
| 444 case CDROM_AUDIO_NO_STATUS: | |
| 445 /* Try to determine if there's a CD available */ | |
| 446 if (ioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) | |
| 447 status = CD_STOPPED; | |
| 448 else | |
| 449 status = CD_TRAYEMPTY; | |
| 450 break; | |
| 451 case CDROM_AUDIO_COMPLETED: | |
| 452 status = CD_STOPPED; | |
| 453 break; | |
| 454 case CDROM_AUDIO_PLAY: | |
| 455 status = CD_PLAYING; | |
| 456 break; | |
| 457 case CDROM_AUDIO_PAUSED: | |
| 458 /* Workaround buggy CD-ROM drive */ | |
| 459 if ( info.cdsc_trk == CDROM_LEADOUT ) { | |
| 460 status = CD_STOPPED; | |
| 461 } else { | |
| 462 status = CD_PAUSED; | |
| 463 } | |
| 464 break; | |
| 465 default: | |
| 466 status = CD_ERROR; | |
| 467 break; | |
| 468 } | |
| 469 } | |
| 470 if ( position ) { | |
| 471 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 472 *position = MSF_TO_FRAMES( | |
| 473 info.cdsc_absaddr.msf.minute, | |
| 474 info.cdsc_absaddr.msf.second, | |
| 475 info.cdsc_absaddr.msf.frame); | |
| 476 } else { | |
| 477 *position = 0; | |
| 478 } | |
| 479 } | |
| 480 return(status); | |
| 481 } | |
| 482 | |
| 483 /* Start play */ | |
| 484 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 485 { | |
| 486 struct cdrom_msf playtime; | |
| 487 | |
| 488 FRAMES_TO_MSF(start, | |
| 489 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0); | |
| 490 FRAMES_TO_MSF(start+length, | |
| 491 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1); | |
| 492 #ifdef DEBUG_CDROM | |
| 493 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 494 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
| 495 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
| 496 #endif | |
| 497 return(SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime)); | |
| 498 } | |
| 499 | |
| 500 /* Pause play */ | |
| 501 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 502 { | |
| 503 return(SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0)); | |
| 504 } | |
| 505 | |
| 506 /* Resume play */ | |
| 507 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 508 { | |
| 509 return(SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0)); | |
| 510 } | |
| 511 | |
| 512 /* Stop play */ | |
| 513 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 514 { | |
| 515 return(SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0)); | |
| 516 } | |
| 517 | |
| 518 /* Eject the CD-ROM */ | |
| 519 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 520 { | |
| 521 return(SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0)); | |
| 522 } | |
| 523 | |
| 524 /* Close the CD-ROM handle */ | |
| 525 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 526 { | |
| 527 close(cdrom->id); | |
| 528 } | |
| 529 | |
| 530 void SDL_SYS_CDQuit(void) | |
| 531 { | |
| 532 int i; | |
| 533 | |
| 534 if ( SDL_numcds > 0 ) { | |
| 535 for ( i=0; i<SDL_numcds; ++i ) { | |
| 536 free(SDL_cdlist[i]); | |
| 537 } | |
| 538 SDL_numcds = 0; | |
| 539 } | |
| 540 } | |
| 541 |