Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 1843:c2c327e8e781
Needed unistd.h for unlink()
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 17 May 2006 04:11:33 +0000 |
| parents | 4d66375c2012 |
| children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 616 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 616 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 616 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 616 | 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 | |
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13 Lesser General Public License for more details. |
| 616 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 616 | 18 |
| 19 Sam Lantinga | |
| 20 slouken@libsdl.org | |
| 21 */ | |
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22 #include "SDL_config.h" |
| 616 | 23 |
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24 #ifdef SDL_CDROM_MACOSX |
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25 |
| 616 | 26 #include "SDL_syscdrom_c.h" |
| 27 | |
| 28 #pragma mark -- Globals -- | |
| 29 | |
| 30 static FSRef** tracks; | |
| 31 static FSVolumeRefNum* volumes; | |
| 32 static CDstatus status; | |
| 33 static int nextTrackFrame; | |
| 34 static int nextTrackFramesRemaining; | |
| 35 static int fakeCD; | |
| 36 static int currentTrack; | |
| 37 static int didReadTOC; | |
| 38 static int cacheTOCNumTracks; | |
| 39 static int currentDrive; /* Only allow 1 drive in use at a time */ | |
| 40 | |
| 41 #pragma mark -- Prototypes -- | |
| 42 | |
| 43 static const char *SDL_SYS_CDName (int drive); | |
| 44 static int SDL_SYS_CDOpen (int drive); | |
| 45 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom); | |
| 46 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position); | |
| 47 static int SDL_SYS_CDPlay (SDL_CD *cdrom, int start, int length); | |
| 48 static int SDL_SYS_CDPause (SDL_CD *cdrom); | |
| 49 static int SDL_SYS_CDResume (SDL_CD *cdrom); | |
| 50 static int SDL_SYS_CDStop (SDL_CD *cdrom); | |
| 51 static int SDL_SYS_CDEject (SDL_CD *cdrom); | |
| 52 static void SDL_SYS_CDClose (SDL_CD *cdrom); | |
| 53 | |
| 54 #pragma mark -- Helper Functions -- | |
| 55 | |
| 56 /* Read a list of tracks from the volume */ | |
| 57 static int LoadTracks (SDL_CD *cdrom) | |
| 58 { | |
| 59 /* Check if tracks are already loaded */ | |
| 60 if ( tracks[cdrom->id] != NULL ) | |
| 61 return 0; | |
| 62 | |
| 63 /* Allocate memory for tracks */ | |
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64 tracks[cdrom->id] = (FSRef*) SDL_calloc (1, sizeof(**tracks) * cdrom->numtracks); |
| 616 | 65 if (tracks[cdrom->id] == NULL) { |
| 66 SDL_OutOfMemory (); | |
| 67 return -1; | |
| 68 } | |
| 69 | |
| 70 /* Load tracks */ | |
| 71 if (ListTrackFiles (volumes[cdrom->id], tracks[cdrom->id], cdrom->numtracks) < 0) | |
| 72 return -1; | |
| 73 | |
| 74 return 0; | |
| 75 } | |
| 76 | |
| 77 /* Find a file for a given start frame and length */ | |
| 78 static FSRef* GetFileForOffset (SDL_CD *cdrom, int start, int length, int *outStartFrame, int *outStopFrame) | |
| 79 { | |
| 80 int i; | |
| 81 | |
| 82 for (i = 0; i < cdrom->numtracks; i++) { | |
| 83 | |
| 84 if (cdrom->track[i].offset <= start && | |
| 85 start < (cdrom->track[i].offset + cdrom->track[i].length)) | |
| 86 break; | |
| 87 } | |
| 88 | |
| 89 if (i == cdrom->numtracks) | |
| 90 return NULL; | |
| 91 | |
| 92 currentTrack = i; | |
| 93 | |
| 94 *outStartFrame = start - cdrom->track[i].offset; | |
| 95 | |
| 96 if ((*outStartFrame + length) < cdrom->track[i].length) { | |
| 97 *outStopFrame = *outStartFrame + length; | |
| 98 length = 0; | |
| 99 nextTrackFrame = -1; | |
| 100 nextTrackFramesRemaining = -1; | |
| 101 } | |
| 102 else { | |
| 103 *outStopFrame = -1; | |
| 104 length -= cdrom->track[i].length - *outStartFrame; | |
| 105 nextTrackFrame = cdrom->track[i+1].offset; | |
| 106 nextTrackFramesRemaining = length; | |
| 107 } | |
| 108 | |
| 109 return &tracks[cdrom->id][i]; | |
| 110 } | |
| 111 | |
| 112 /* Setup another file for playback, or stop playback (called from another thread) */ | |
| 113 static void CompletionProc (SDL_CD *cdrom) | |
| 114 { | |
| 115 | |
| 116 Lock (); | |
| 117 | |
| 118 if (nextTrackFrame > 0 && nextTrackFramesRemaining > 0) { | |
| 119 | |
| 120 /* Load the next file to play */ | |
| 121 int startFrame, stopFrame; | |
| 122 FSRef *file; | |
| 123 | |
| 124 PauseFile (); | |
| 125 ReleaseFile (); | |
| 126 | |
| 127 file = GetFileForOffset (cdrom, nextTrackFrame, | |
| 128 nextTrackFramesRemaining, &startFrame, &stopFrame); | |
| 129 | |
| 130 if (file == NULL) { | |
| 131 status = CD_STOPPED; | |
| 132 Unlock (); | |
| 133 return; | |
| 134 } | |
| 135 | |
| 136 LoadFile (file, startFrame, stopFrame); | |
| 137 | |
| 138 SetCompletionProc (CompletionProc, cdrom); | |
| 139 | |
| 140 PlayFile (); | |
| 141 } | |
| 142 else { | |
| 143 | |
| 144 /* Release the current file */ | |
| 145 PauseFile (); | |
| 146 ReleaseFile (); | |
| 147 status = CD_STOPPED; | |
| 148 } | |
| 149 | |
| 150 Unlock (); | |
| 151 } | |
| 152 | |
| 153 | |
| 154 #pragma mark -- Driver Functions -- | |
| 155 | |
| 156 /* Initialize */ | |
| 157 int SDL_SYS_CDInit (void) | |
| 158 { | |
| 159 /* Initialize globals */ | |
| 160 volumes = NULL; | |
| 161 tracks = NULL; | |
| 162 status = CD_STOPPED; | |
| 163 nextTrackFrame = -1; | |
| 164 nextTrackFramesRemaining = -1; | |
| 165 fakeCD = SDL_FALSE; | |
| 166 currentTrack = -1; | |
| 167 didReadTOC = SDL_FALSE; | |
| 168 cacheTOCNumTracks = -1; | |
| 169 currentDrive = -1; | |
| 170 | |
| 171 /* Fill in function pointers */ | |
| 172 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 173 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 174 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 175 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 176 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 177 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 178 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 179 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 180 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 181 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 182 | |
| 183 /* | |
| 184 Read the list of "drives" | |
| 185 | |
| 186 This is currently a hack that infers drives from | |
| 187 mounted audio CD volumes, rather than | |
| 188 actual CD-ROM devices - which means it may not | |
| 189 act as expected sometimes. | |
| 190 */ | |
| 191 | |
| 192 /* Find out how many cd volumes are mounted */ | |
| 193 SDL_numcds = DetectAudioCDVolumes (NULL, 0); | |
| 194 | |
| 195 /* | |
| 196 If there are no volumes, fake a cd device | |
| 197 so tray empty can be reported. | |
| 198 */ | |
| 199 if (SDL_numcds == 0) { | |
| 200 | |
| 201 fakeCD = SDL_TRUE; | |
| 202 SDL_numcds = 1; | |
| 203 status = CD_TRAYEMPTY; | |
| 204 | |
| 205 return 0; | |
| 206 } | |
| 207 | |
| 208 /* Allocate space for volumes */ | |
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209 volumes = (FSVolumeRefNum*) SDL_calloc (1, sizeof(*volumes) * SDL_numcds); |
| 616 | 210 if (volumes == NULL) { |
| 211 SDL_OutOfMemory (); | |
| 212 return -1; | |
| 213 } | |
| 214 | |
| 215 /* Allocate space for tracks */ | |
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216 tracks = (FSRef**) SDL_calloc (1, sizeof(*tracks) * (SDL_numcds + 1)); |
| 616 | 217 if (tracks == NULL) { |
| 218 SDL_OutOfMemory (); | |
| 219 return -1; | |
| 220 } | |
| 221 | |
| 222 /* Mark the end of the tracks array */ | |
| 223 tracks[ SDL_numcds ] = (FSRef*)-1; | |
| 224 | |
| 225 /* | |
| 226 Redetect, now save all volumes for later | |
| 227 Update SDL_numcds just in case it changed | |
| 228 */ | |
| 229 { | |
| 230 int numVolumes = SDL_numcds; | |
| 231 | |
| 232 SDL_numcds = DetectAudioCDVolumes (volumes, numVolumes); | |
| 233 | |
| 234 /* If more cds suddenly show up, ignore them */ | |
| 235 if (SDL_numcds > numVolumes) { | |
| 236 SDL_SetError ("Some CD's were added but they will be ignored"); | |
| 237 SDL_numcds = numVolumes; | |
| 238 } | |
| 239 } | |
| 240 | |
| 241 return 0; | |
| 242 } | |
| 243 | |
| 244 /* Shutdown and cleanup */ | |
| 245 void SDL_SYS_CDQuit(void) | |
| 246 { | |
| 247 ReleaseFile(); | |
| 248 | |
| 249 if (volumes != NULL) | |
| 250 free (volumes); | |
| 251 | |
| 252 if (tracks != NULL) { | |
| 253 | |
| 254 FSRef **ptr; | |
| 255 for (ptr = tracks; *ptr != (FSRef*)-1; ptr++) | |
| 256 if (*ptr != NULL) | |
| 257 free (*ptr); | |
| 258 | |
| 259 free (tracks); | |
| 260 } | |
| 261 } | |
| 262 | |
| 263 /* Get the Unix disk name of the volume */ | |
| 264 static const char *SDL_SYS_CDName (int drive) | |
| 265 { | |
| 266 OSStatus err = noErr; | |
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267 HParamBlockRec pb; |
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268 GetVolParmsInfoBuffer volParmsInfo; |
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269 |
| 616 | 270 if (fakeCD) |
| 271 return "Fake CD-ROM Device"; | |
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272 |
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273 pb.ioParam.ioNamePtr = NULL; |
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274 pb.ioParam.ioVRefNum = volumes[drive]; |
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275 pb.ioParam.ioBuffer = (Ptr)&volParmsInfo; |
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276 pb.ioParam.ioReqCount = (SInt32)sizeof(volParmsInfo); |
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277 err = PBHGetVolParmsSync(&pb); |
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278 |
| 616 | 279 if (err != noErr) { |
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280 SDL_SetError ("PBHGetVolParmsSync returned %d", err); |
| 616 | 281 return NULL; |
| 282 } | |
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283 |
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284 return volParmsInfo.vMDeviceID; |
| 616 | 285 } |
| 286 | |
| 287 /* Open the "device" */ | |
| 288 static int SDL_SYS_CDOpen (int drive) | |
| 289 { | |
| 290 /* Only allow 1 device to be open */ | |
| 291 if (currentDrive >= 0) { | |
| 292 SDL_SetError ("Only one cdrom is supported"); | |
| 293 return -1; | |
| 294 } | |
| 295 else | |
| 296 currentDrive = drive; | |
| 297 | |
| 298 return drive; | |
| 299 } | |
| 300 | |
| 301 /* Get the table of contents */ | |
| 302 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom) | |
| 303 { | |
| 304 if (fakeCD) { | |
| 305 SDL_SetError (kErrorFakeDevice); | |
| 306 return -1; | |
| 307 } | |
| 308 | |
| 309 if (didReadTOC) { | |
| 310 cdrom->numtracks = cacheTOCNumTracks; | |
| 311 return 0; | |
| 312 } | |
| 313 | |
| 314 | |
| 315 ReadTOCData (volumes[cdrom->id], cdrom); | |
| 316 didReadTOC = SDL_TRUE; | |
| 317 cacheTOCNumTracks = cdrom->numtracks; | |
| 318 | |
| 319 return 0; | |
| 320 } | |
| 321 | |
| 322 /* Get CD-ROM status */ | |
| 323 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position) | |
| 324 { | |
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325 if (position) { |
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326 int trackFrame; |
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327 |
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328 Lock (); |
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329 trackFrame = GetCurrentFrame (); |
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330 Unlock (); |
| 616 | 331 |
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332 *position = cdrom->track[currentTrack].offset + trackFrame; |
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333 } |
| 616 | 334 |
| 335 return status; | |
| 336 } | |
| 337 | |
| 338 /* Start playback */ | |
| 339 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 340 { | |
| 341 int startFrame, stopFrame; | |
| 342 FSRef *ref; | |
| 343 | |
| 344 if (fakeCD) { | |
| 345 SDL_SetError (kErrorFakeDevice); | |
| 346 return -1; | |
| 347 } | |
| 348 | |
| 349 Lock(); | |
| 350 | |
| 351 if (LoadTracks (cdrom) < 0) | |
| 352 return -2; | |
| 353 | |
| 354 if (PauseFile () < 0) | |
| 355 return -3; | |
| 356 | |
| 357 if (ReleaseFile () < 0) | |
| 358 return -4; | |
| 359 | |
| 360 ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame); | |
| 361 if (ref == NULL) { | |
| 362 SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", start, length); | |
| 363 return -5; | |
| 364 } | |
| 365 | |
| 366 if (LoadFile (ref, startFrame, stopFrame) < 0) | |
| 367 return -6; | |
| 368 | |
| 369 SetCompletionProc (CompletionProc, cdrom); | |
| 370 | |
| 371 if (PlayFile () < 0) | |
| 372 return -7; | |
| 373 | |
| 374 status = CD_PLAYING; | |
| 375 | |
| 376 Unlock(); | |
| 377 | |
| 378 return 0; | |
| 379 } | |
| 380 | |
| 381 /* Pause playback */ | |
| 382 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 383 { | |
| 384 if (fakeCD) { | |
| 385 SDL_SetError (kErrorFakeDevice); | |
| 386 return -1; | |
| 387 } | |
| 388 | |
| 389 Lock (); | |
| 390 | |
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391 if (PauseFile () < 0) { |
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392 Unlock (); |
| 616 | 393 return -2; |
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394 } |
| 616 | 395 |
| 396 status = CD_PAUSED; | |
| 397 | |
| 398 Unlock (); | |
| 399 | |
| 400 return 0; | |
| 401 } | |
| 402 | |
| 403 /* Resume playback */ | |
| 404 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 405 { | |
| 406 if (fakeCD) { | |
| 407 SDL_SetError (kErrorFakeDevice); | |
| 408 return -1; | |
| 409 } | |
| 410 | |
| 411 Lock (); | |
| 412 | |
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413 if (PlayFile () < 0) { |
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414 Unlock (); |
| 616 | 415 return -2; |
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416 } |
| 616 | 417 |
| 418 status = CD_PLAYING; | |
| 419 | |
| 420 Unlock (); | |
| 421 | |
| 422 return 0; | |
| 423 } | |
| 424 | |
| 425 /* Stop playback */ | |
| 426 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 427 { | |
| 428 if (fakeCD) { | |
| 429 SDL_SetError (kErrorFakeDevice); | |
| 430 return -1; | |
| 431 } | |
| 432 | |
| 433 Lock (); | |
| 434 | |
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435 if (PauseFile () < 0) { |
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436 Unlock (); |
| 616 | 437 return -2; |
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438 } |
| 616 | 439 |
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440 if (ReleaseFile () < 0) { |
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441 Unlock (); |
| 616 | 442 return -3; |
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443 } |
| 616 | 444 |
| 445 status = CD_STOPPED; | |
| 446 | |
| 447 Unlock (); | |
| 448 | |
| 449 return 0; | |
| 450 } | |
| 451 | |
| 452 /* Eject the CD-ROM (Unmount the volume) */ | |
| 453 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 454 { | |
| 455 OSStatus err; | |
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456 pid_t dissenter; |
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457 |
| 616 | 458 if (fakeCD) { |
| 459 SDL_SetError (kErrorFakeDevice); | |
| 460 return -1; | |
| 461 } | |
| 462 | |
| 463 Lock (); | |
| 464 | |
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465 if (PauseFile () < 0) { |
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466 Unlock (); |
| 616 | 467 return -2; |
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468 } |
| 616 | 469 |
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470 if (ReleaseFile () < 0) { |
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471 Unlock (); |
| 616 | 472 return -3; |
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473 } |
| 616 | 474 |
| 475 status = CD_STOPPED; | |
| 476 | |
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477 /* Eject the volume */ |
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478 err = FSEjectVolumeSync(volumes[cdrom->id], kNilOptions, &dissenter); |
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479 |
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480 if (err != noErr) { |
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481 Unlock (); |
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482 SDL_SetError ("PBUnmountVol returned %d", err); |
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483 return -4; |
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484 } |
| 616 | 485 |
| 486 status = CD_TRAYEMPTY; | |
| 487 | |
| 488 /* Invalidate volume and track info */ | |
| 489 volumes[cdrom->id] = 0; | |
| 490 free (tracks[cdrom->id]); | |
| 491 tracks[cdrom->id] = NULL; | |
| 492 | |
| 493 Unlock (); | |
| 494 | |
| 495 return 0; | |
| 496 } | |
| 497 | |
| 498 /* Close the CD-ROM */ | |
| 499 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 500 { | |
| 501 currentDrive = -1; | |
| 502 return; | |
| 503 } | |
| 504 | |
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505 #endif /* SDL_CDROM_MACOSX */ |