Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 1349:3f395c825b14
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 08 Feb 2006 17:23:32 +0000 |
| parents | 604d73db6802 |
| children | d910939febfa |
| 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 */ | |
| 22 | |
| 23 #include "SDL_syscdrom_c.h" | |
| 24 | |
| 25 #pragma mark -- Globals -- | |
| 26 | |
| 27 static FSRef** tracks; | |
| 28 static FSVolumeRefNum* volumes; | |
| 29 static CDstatus status; | |
| 30 static int nextTrackFrame; | |
| 31 static int nextTrackFramesRemaining; | |
| 32 static int fakeCD; | |
| 33 static int currentTrack; | |
| 34 static int didReadTOC; | |
| 35 static int cacheTOCNumTracks; | |
| 36 static int currentDrive; /* Only allow 1 drive in use at a time */ | |
| 37 | |
| 38 #pragma mark -- Prototypes -- | |
| 39 | |
| 40 static const char *SDL_SYS_CDName (int drive); | |
| 41 static int SDL_SYS_CDOpen (int drive); | |
| 42 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom); | |
| 43 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position); | |
| 44 static int SDL_SYS_CDPlay (SDL_CD *cdrom, int start, int length); | |
| 45 static int SDL_SYS_CDPause (SDL_CD *cdrom); | |
| 46 static int SDL_SYS_CDResume (SDL_CD *cdrom); | |
| 47 static int SDL_SYS_CDStop (SDL_CD *cdrom); | |
| 48 static int SDL_SYS_CDEject (SDL_CD *cdrom); | |
| 49 static void SDL_SYS_CDClose (SDL_CD *cdrom); | |
| 50 | |
| 51 #pragma mark -- Helper Functions -- | |
| 52 | |
| 53 /* Read a list of tracks from the volume */ | |
| 54 static int LoadTracks (SDL_CD *cdrom) | |
| 55 { | |
| 56 /* Check if tracks are already loaded */ | |
| 57 if ( tracks[cdrom->id] != NULL ) | |
| 58 return 0; | |
| 59 | |
| 60 /* Allocate memory for tracks */ | |
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61 tracks[cdrom->id] = (FSRef*) SDL_calloc (1, sizeof(**tracks) * cdrom->numtracks); |
| 616 | 62 if (tracks[cdrom->id] == NULL) { |
| 63 SDL_OutOfMemory (); | |
| 64 return -1; | |
| 65 } | |
| 66 | |
| 67 /* Load tracks */ | |
| 68 if (ListTrackFiles (volumes[cdrom->id], tracks[cdrom->id], cdrom->numtracks) < 0) | |
| 69 return -1; | |
| 70 | |
| 71 return 0; | |
| 72 } | |
| 73 | |
| 74 /* Find a file for a given start frame and length */ | |
| 75 static FSRef* GetFileForOffset (SDL_CD *cdrom, int start, int length, int *outStartFrame, int *outStopFrame) | |
| 76 { | |
| 77 int i; | |
| 78 | |
| 79 for (i = 0; i < cdrom->numtracks; i++) { | |
| 80 | |
| 81 if (cdrom->track[i].offset <= start && | |
| 82 start < (cdrom->track[i].offset + cdrom->track[i].length)) | |
| 83 break; | |
| 84 } | |
| 85 | |
| 86 if (i == cdrom->numtracks) | |
| 87 return NULL; | |
| 88 | |
| 89 currentTrack = i; | |
| 90 | |
| 91 *outStartFrame = start - cdrom->track[i].offset; | |
| 92 | |
| 93 if ((*outStartFrame + length) < cdrom->track[i].length) { | |
| 94 *outStopFrame = *outStartFrame + length; | |
| 95 length = 0; | |
| 96 nextTrackFrame = -1; | |
| 97 nextTrackFramesRemaining = -1; | |
| 98 } | |
| 99 else { | |
| 100 *outStopFrame = -1; | |
| 101 length -= cdrom->track[i].length - *outStartFrame; | |
| 102 nextTrackFrame = cdrom->track[i+1].offset; | |
| 103 nextTrackFramesRemaining = length; | |
| 104 } | |
| 105 | |
| 106 return &tracks[cdrom->id][i]; | |
| 107 } | |
| 108 | |
| 109 /* Setup another file for playback, or stop playback (called from another thread) */ | |
| 110 static void CompletionProc (SDL_CD *cdrom) | |
| 111 { | |
| 112 | |
| 113 Lock (); | |
| 114 | |
| 115 if (nextTrackFrame > 0 && nextTrackFramesRemaining > 0) { | |
| 116 | |
| 117 /* Load the next file to play */ | |
| 118 int startFrame, stopFrame; | |
| 119 FSRef *file; | |
| 120 | |
| 121 PauseFile (); | |
| 122 ReleaseFile (); | |
| 123 | |
| 124 file = GetFileForOffset (cdrom, nextTrackFrame, | |
| 125 nextTrackFramesRemaining, &startFrame, &stopFrame); | |
| 126 | |
| 127 if (file == NULL) { | |
| 128 status = CD_STOPPED; | |
| 129 Unlock (); | |
| 130 return; | |
| 131 } | |
| 132 | |
| 133 LoadFile (file, startFrame, stopFrame); | |
| 134 | |
| 135 SetCompletionProc (CompletionProc, cdrom); | |
| 136 | |
| 137 PlayFile (); | |
| 138 } | |
| 139 else { | |
| 140 | |
| 141 /* Release the current file */ | |
| 142 PauseFile (); | |
| 143 ReleaseFile (); | |
| 144 status = CD_STOPPED; | |
| 145 } | |
| 146 | |
| 147 Unlock (); | |
| 148 } | |
| 149 | |
| 150 | |
| 151 #pragma mark -- Driver Functions -- | |
| 152 | |
| 153 /* Initialize */ | |
| 154 int SDL_SYS_CDInit (void) | |
| 155 { | |
| 156 /* Initialize globals */ | |
| 157 volumes = NULL; | |
| 158 tracks = NULL; | |
| 159 status = CD_STOPPED; | |
| 160 nextTrackFrame = -1; | |
| 161 nextTrackFramesRemaining = -1; | |
| 162 fakeCD = SDL_FALSE; | |
| 163 currentTrack = -1; | |
| 164 didReadTOC = SDL_FALSE; | |
| 165 cacheTOCNumTracks = -1; | |
| 166 currentDrive = -1; | |
| 167 | |
| 168 /* Fill in function pointers */ | |
| 169 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 170 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 171 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 172 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 173 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 174 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 175 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 176 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 177 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 178 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 179 | |
| 180 /* | |
| 181 Read the list of "drives" | |
| 182 | |
| 183 This is currently a hack that infers drives from | |
| 184 mounted audio CD volumes, rather than | |
| 185 actual CD-ROM devices - which means it may not | |
| 186 act as expected sometimes. | |
| 187 */ | |
| 188 | |
| 189 /* Find out how many cd volumes are mounted */ | |
| 190 SDL_numcds = DetectAudioCDVolumes (NULL, 0); | |
| 191 | |
| 192 /* | |
| 193 If there are no volumes, fake a cd device | |
| 194 so tray empty can be reported. | |
| 195 */ | |
| 196 if (SDL_numcds == 0) { | |
| 197 | |
| 198 fakeCD = SDL_TRUE; | |
| 199 SDL_numcds = 1; | |
| 200 status = CD_TRAYEMPTY; | |
| 201 | |
| 202 return 0; | |
| 203 } | |
| 204 | |
| 205 /* Allocate space for volumes */ | |
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206 volumes = (FSVolumeRefNum*) SDL_calloc (1, sizeof(*volumes) * SDL_numcds); |
| 616 | 207 if (volumes == NULL) { |
| 208 SDL_OutOfMemory (); | |
| 209 return -1; | |
| 210 } | |
| 211 | |
| 212 /* Allocate space for tracks */ | |
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213 tracks = (FSRef**) SDL_calloc (1, sizeof(*tracks) * (SDL_numcds + 1)); |
| 616 | 214 if (tracks == NULL) { |
| 215 SDL_OutOfMemory (); | |
| 216 return -1; | |
| 217 } | |
| 218 | |
| 219 /* Mark the end of the tracks array */ | |
| 220 tracks[ SDL_numcds ] = (FSRef*)-1; | |
| 221 | |
| 222 /* | |
| 223 Redetect, now save all volumes for later | |
| 224 Update SDL_numcds just in case it changed | |
| 225 */ | |
| 226 { | |
| 227 int numVolumes = SDL_numcds; | |
| 228 | |
| 229 SDL_numcds = DetectAudioCDVolumes (volumes, numVolumes); | |
| 230 | |
| 231 /* If more cds suddenly show up, ignore them */ | |
| 232 if (SDL_numcds > numVolumes) { | |
| 233 SDL_SetError ("Some CD's were added but they will be ignored"); | |
| 234 SDL_numcds = numVolumes; | |
| 235 } | |
| 236 } | |
| 237 | |
| 238 return 0; | |
| 239 } | |
| 240 | |
| 241 /* Shutdown and cleanup */ | |
| 242 void SDL_SYS_CDQuit(void) | |
| 243 { | |
| 244 ReleaseFile(); | |
| 245 | |
| 246 if (volumes != NULL) | |
| 247 free (volumes); | |
| 248 | |
| 249 if (tracks != NULL) { | |
| 250 | |
| 251 FSRef **ptr; | |
| 252 for (ptr = tracks; *ptr != (FSRef*)-1; ptr++) | |
| 253 if (*ptr != NULL) | |
| 254 free (*ptr); | |
| 255 | |
| 256 free (tracks); | |
| 257 } | |
| 258 } | |
| 259 | |
| 260 /* Get the Unix disk name of the volume */ | |
| 261 static const char *SDL_SYS_CDName (int drive) | |
| 262 { | |
| 263 OSStatus err = noErr; | |
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264 HParamBlockRec pb; |
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265 GetVolParmsInfoBuffer volParmsInfo; |
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266 |
| 616 | 267 if (fakeCD) |
| 268 return "Fake CD-ROM Device"; | |
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269 |
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270 pb.ioParam.ioNamePtr = NULL; |
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271 pb.ioParam.ioVRefNum = volumes[drive]; |
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272 pb.ioParam.ioBuffer = (Ptr)&volParmsInfo; |
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273 pb.ioParam.ioReqCount = (SInt32)sizeof(volParmsInfo); |
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274 err = PBHGetVolParmsSync(&pb); |
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275 |
| 616 | 276 if (err != noErr) { |
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277 SDL_SetError ("PBHGetVolParmsSync returned %d", err); |
| 616 | 278 return NULL; |
| 279 } | |
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280 |
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281 return volParmsInfo.vMDeviceID; |
| 616 | 282 } |
| 283 | |
| 284 /* Open the "device" */ | |
| 285 static int SDL_SYS_CDOpen (int drive) | |
| 286 { | |
| 287 /* Only allow 1 device to be open */ | |
| 288 if (currentDrive >= 0) { | |
| 289 SDL_SetError ("Only one cdrom is supported"); | |
| 290 return -1; | |
| 291 } | |
| 292 else | |
| 293 currentDrive = drive; | |
| 294 | |
| 295 return drive; | |
| 296 } | |
| 297 | |
| 298 /* Get the table of contents */ | |
| 299 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom) | |
| 300 { | |
| 301 if (fakeCD) { | |
| 302 SDL_SetError (kErrorFakeDevice); | |
| 303 return -1; | |
| 304 } | |
| 305 | |
| 306 if (didReadTOC) { | |
| 307 cdrom->numtracks = cacheTOCNumTracks; | |
| 308 return 0; | |
| 309 } | |
| 310 | |
| 311 | |
| 312 ReadTOCData (volumes[cdrom->id], cdrom); | |
| 313 didReadTOC = SDL_TRUE; | |
| 314 cacheTOCNumTracks = cdrom->numtracks; | |
| 315 | |
| 316 return 0; | |
| 317 } | |
| 318 | |
| 319 /* Get CD-ROM status */ | |
| 320 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position) | |
| 321 { | |
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322 if (position) { |
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323 int trackFrame; |
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324 |
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325 Lock (); |
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326 trackFrame = GetCurrentFrame (); |
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327 Unlock (); |
| 616 | 328 |
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329 *position = cdrom->track[currentTrack].offset + trackFrame; |
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330 } |
| 616 | 331 |
| 332 return status; | |
| 333 } | |
| 334 | |
| 335 /* Start playback */ | |
| 336 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 337 { | |
| 338 int startFrame, stopFrame; | |
| 339 FSRef *ref; | |
| 340 | |
| 341 if (fakeCD) { | |
| 342 SDL_SetError (kErrorFakeDevice); | |
| 343 return -1; | |
| 344 } | |
| 345 | |
| 346 Lock(); | |
| 347 | |
| 348 if (LoadTracks (cdrom) < 0) | |
| 349 return -2; | |
| 350 | |
| 351 if (PauseFile () < 0) | |
| 352 return -3; | |
| 353 | |
| 354 if (ReleaseFile () < 0) | |
| 355 return -4; | |
| 356 | |
| 357 ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame); | |
| 358 if (ref == NULL) { | |
| 359 SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", start, length); | |
| 360 return -5; | |
| 361 } | |
| 362 | |
| 363 if (LoadFile (ref, startFrame, stopFrame) < 0) | |
| 364 return -6; | |
| 365 | |
| 366 SetCompletionProc (CompletionProc, cdrom); | |
| 367 | |
| 368 if (PlayFile () < 0) | |
| 369 return -7; | |
| 370 | |
| 371 status = CD_PLAYING; | |
| 372 | |
| 373 Unlock(); | |
| 374 | |
| 375 return 0; | |
| 376 } | |
| 377 | |
| 378 /* Pause playback */ | |
| 379 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 380 { | |
| 381 if (fakeCD) { | |
| 382 SDL_SetError (kErrorFakeDevice); | |
| 383 return -1; | |
| 384 } | |
| 385 | |
| 386 Lock (); | |
| 387 | |
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388 if (PauseFile () < 0) { |
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389 Unlock (); |
| 616 | 390 return -2; |
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391 } |
| 616 | 392 |
| 393 status = CD_PAUSED; | |
| 394 | |
| 395 Unlock (); | |
| 396 | |
| 397 return 0; | |
| 398 } | |
| 399 | |
| 400 /* Resume playback */ | |
| 401 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 402 { | |
| 403 if (fakeCD) { | |
| 404 SDL_SetError (kErrorFakeDevice); | |
| 405 return -1; | |
| 406 } | |
| 407 | |
| 408 Lock (); | |
| 409 | |
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410 if (PlayFile () < 0) { |
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411 Unlock (); |
| 616 | 412 return -2; |
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413 } |
| 616 | 414 |
| 415 status = CD_PLAYING; | |
| 416 | |
| 417 Unlock (); | |
| 418 | |
| 419 return 0; | |
| 420 } | |
| 421 | |
| 422 /* Stop playback */ | |
| 423 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 424 { | |
| 425 if (fakeCD) { | |
| 426 SDL_SetError (kErrorFakeDevice); | |
| 427 return -1; | |
| 428 } | |
| 429 | |
| 430 Lock (); | |
| 431 | |
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432 if (PauseFile () < 0) { |
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433 Unlock (); |
| 616 | 434 return -2; |
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435 } |
| 616 | 436 |
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437 if (ReleaseFile () < 0) { |
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438 Unlock (); |
| 616 | 439 return -3; |
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440 } |
| 616 | 441 |
| 442 status = CD_STOPPED; | |
| 443 | |
| 444 Unlock (); | |
| 445 | |
| 446 return 0; | |
| 447 } | |
| 448 | |
| 449 /* Eject the CD-ROM (Unmount the volume) */ | |
| 450 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 451 { | |
| 452 OSStatus err; | |
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453 HParamBlockRec pb; |
| 616 | 454 |
| 455 if (fakeCD) { | |
| 456 SDL_SetError (kErrorFakeDevice); | |
| 457 return -1; | |
| 458 } | |
| 459 | |
| 460 Lock (); | |
| 461 | |
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462 if (PauseFile () < 0) { |
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463 Unlock (); |
| 616 | 464 return -2; |
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465 } |
| 616 | 466 |
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467 if (ReleaseFile () < 0) { |
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468 Unlock (); |
| 616 | 469 return -3; |
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470 } |
| 616 | 471 |
| 472 status = CD_STOPPED; | |
| 473 | |
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474 // Eject the volume |
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475 pb.ioParam.ioNamePtr = NULL; |
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476 pb.ioParam.ioVRefNum = volumes[cdrom->id]; |
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477 err = PBUnmountVol((ParamBlockRec *) &pb); |
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478 |
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479 if (err != noErr) { |
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480 Unlock (); |
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481 SDL_SetError ("PBUnmountVol returned %d", err); |
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482 return -4; |
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483 } |
| 616 | 484 |
| 485 status = CD_TRAYEMPTY; | |
| 486 | |
| 487 /* Invalidate volume and track info */ | |
| 488 volumes[cdrom->id] = 0; | |
| 489 free (tracks[cdrom->id]); | |
| 490 tracks[cdrom->id] = NULL; | |
| 491 | |
| 492 Unlock (); | |
| 493 | |
| 494 return 0; | |
| 495 } | |
| 496 | |
| 497 /* Close the CD-ROM */ | |
| 498 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 499 { | |
| 500 currentDrive = -1; | |
| 501 return; | |
| 502 } | |
| 503 |