Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 1487:dc6b59e925a2
Cleaning up warnings on MacOS X
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 09 Mar 2006 06:33:21 +0000 |
| parents | d910939febfa |
| children | 92947e3a18db |
| 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 |
| 24 #include "SDL_syscdrom_c.h" | |
| 25 | |
| 26 #pragma mark -- Globals -- | |
| 27 | |
| 28 static FSRef** tracks; | |
| 29 static FSVolumeRefNum* volumes; | |
| 30 static CDstatus status; | |
| 31 static int nextTrackFrame; | |
| 32 static int nextTrackFramesRemaining; | |
| 33 static int fakeCD; | |
| 34 static int currentTrack; | |
| 35 static int didReadTOC; | |
| 36 static int cacheTOCNumTracks; | |
| 37 static int currentDrive; /* Only allow 1 drive in use at a time */ | |
| 38 | |
| 39 #pragma mark -- Prototypes -- | |
| 40 | |
| 41 static const char *SDL_SYS_CDName (int drive); | |
| 42 static int SDL_SYS_CDOpen (int drive); | |
| 43 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom); | |
| 44 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position); | |
| 45 static int SDL_SYS_CDPlay (SDL_CD *cdrom, int start, int length); | |
| 46 static int SDL_SYS_CDPause (SDL_CD *cdrom); | |
| 47 static int SDL_SYS_CDResume (SDL_CD *cdrom); | |
| 48 static int SDL_SYS_CDStop (SDL_CD *cdrom); | |
| 49 static int SDL_SYS_CDEject (SDL_CD *cdrom); | |
| 50 static void SDL_SYS_CDClose (SDL_CD *cdrom); | |
| 51 | |
| 52 #pragma mark -- Helper Functions -- | |
| 53 | |
| 54 /* Read a list of tracks from the volume */ | |
| 55 static int LoadTracks (SDL_CD *cdrom) | |
| 56 { | |
| 57 /* Check if tracks are already loaded */ | |
| 58 if ( tracks[cdrom->id] != NULL ) | |
| 59 return 0; | |
| 60 | |
| 61 /* Allocate memory for tracks */ | |
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62 tracks[cdrom->id] = (FSRef*) SDL_calloc (1, sizeof(**tracks) * cdrom->numtracks); |
| 616 | 63 if (tracks[cdrom->id] == NULL) { |
| 64 SDL_OutOfMemory (); | |
| 65 return -1; | |
| 66 } | |
| 67 | |
| 68 /* Load tracks */ | |
| 69 if (ListTrackFiles (volumes[cdrom->id], tracks[cdrom->id], cdrom->numtracks) < 0) | |
| 70 return -1; | |
| 71 | |
| 72 return 0; | |
| 73 } | |
| 74 | |
| 75 /* Find a file for a given start frame and length */ | |
| 76 static FSRef* GetFileForOffset (SDL_CD *cdrom, int start, int length, int *outStartFrame, int *outStopFrame) | |
| 77 { | |
| 78 int i; | |
| 79 | |
| 80 for (i = 0; i < cdrom->numtracks; i++) { | |
| 81 | |
| 82 if (cdrom->track[i].offset <= start && | |
| 83 start < (cdrom->track[i].offset + cdrom->track[i].length)) | |
| 84 break; | |
| 85 } | |
| 86 | |
| 87 if (i == cdrom->numtracks) | |
| 88 return NULL; | |
| 89 | |
| 90 currentTrack = i; | |
| 91 | |
| 92 *outStartFrame = start - cdrom->track[i].offset; | |
| 93 | |
| 94 if ((*outStartFrame + length) < cdrom->track[i].length) { | |
| 95 *outStopFrame = *outStartFrame + length; | |
| 96 length = 0; | |
| 97 nextTrackFrame = -1; | |
| 98 nextTrackFramesRemaining = -1; | |
| 99 } | |
| 100 else { | |
| 101 *outStopFrame = -1; | |
| 102 length -= cdrom->track[i].length - *outStartFrame; | |
| 103 nextTrackFrame = cdrom->track[i+1].offset; | |
| 104 nextTrackFramesRemaining = length; | |
| 105 } | |
| 106 | |
| 107 return &tracks[cdrom->id][i]; | |
| 108 } | |
| 109 | |
| 110 /* Setup another file for playback, or stop playback (called from another thread) */ | |
| 111 static void CompletionProc (SDL_CD *cdrom) | |
| 112 { | |
| 113 | |
| 114 Lock (); | |
| 115 | |
| 116 if (nextTrackFrame > 0 && nextTrackFramesRemaining > 0) { | |
| 117 | |
| 118 /* Load the next file to play */ | |
| 119 int startFrame, stopFrame; | |
| 120 FSRef *file; | |
| 121 | |
| 122 PauseFile (); | |
| 123 ReleaseFile (); | |
| 124 | |
| 125 file = GetFileForOffset (cdrom, nextTrackFrame, | |
| 126 nextTrackFramesRemaining, &startFrame, &stopFrame); | |
| 127 | |
| 128 if (file == NULL) { | |
| 129 status = CD_STOPPED; | |
| 130 Unlock (); | |
| 131 return; | |
| 132 } | |
| 133 | |
| 134 LoadFile (file, startFrame, stopFrame); | |
| 135 | |
| 136 SetCompletionProc (CompletionProc, cdrom); | |
| 137 | |
| 138 PlayFile (); | |
| 139 } | |
| 140 else { | |
| 141 | |
| 142 /* Release the current file */ | |
| 143 PauseFile (); | |
| 144 ReleaseFile (); | |
| 145 status = CD_STOPPED; | |
| 146 } | |
| 147 | |
| 148 Unlock (); | |
| 149 } | |
| 150 | |
| 151 | |
| 152 #pragma mark -- Driver Functions -- | |
| 153 | |
| 154 /* Initialize */ | |
| 155 int SDL_SYS_CDInit (void) | |
| 156 { | |
| 157 /* Initialize globals */ | |
| 158 volumes = NULL; | |
| 159 tracks = NULL; | |
| 160 status = CD_STOPPED; | |
| 161 nextTrackFrame = -1; | |
| 162 nextTrackFramesRemaining = -1; | |
| 163 fakeCD = SDL_FALSE; | |
| 164 currentTrack = -1; | |
| 165 didReadTOC = SDL_FALSE; | |
| 166 cacheTOCNumTracks = -1; | |
| 167 currentDrive = -1; | |
| 168 | |
| 169 /* Fill in function pointers */ | |
| 170 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 171 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 172 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 173 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 174 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 175 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 176 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 177 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 178 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 179 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 180 | |
| 181 /* | |
| 182 Read the list of "drives" | |
| 183 | |
| 184 This is currently a hack that infers drives from | |
| 185 mounted audio CD volumes, rather than | |
| 186 actual CD-ROM devices - which means it may not | |
| 187 act as expected sometimes. | |
| 188 */ | |
| 189 | |
| 190 /* Find out how many cd volumes are mounted */ | |
| 191 SDL_numcds = DetectAudioCDVolumes (NULL, 0); | |
| 192 | |
| 193 /* | |
| 194 If there are no volumes, fake a cd device | |
| 195 so tray empty can be reported. | |
| 196 */ | |
| 197 if (SDL_numcds == 0) { | |
| 198 | |
| 199 fakeCD = SDL_TRUE; | |
| 200 SDL_numcds = 1; | |
| 201 status = CD_TRAYEMPTY; | |
| 202 | |
| 203 return 0; | |
| 204 } | |
| 205 | |
| 206 /* Allocate space for volumes */ | |
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207 volumes = (FSVolumeRefNum*) SDL_calloc (1, sizeof(*volumes) * SDL_numcds); |
| 616 | 208 if (volumes == NULL) { |
| 209 SDL_OutOfMemory (); | |
| 210 return -1; | |
| 211 } | |
| 212 | |
| 213 /* Allocate space for tracks */ | |
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214 tracks = (FSRef**) SDL_calloc (1, sizeof(*tracks) * (SDL_numcds + 1)); |
| 616 | 215 if (tracks == NULL) { |
| 216 SDL_OutOfMemory (); | |
| 217 return -1; | |
| 218 } | |
| 219 | |
| 220 /* Mark the end of the tracks array */ | |
| 221 tracks[ SDL_numcds ] = (FSRef*)-1; | |
| 222 | |
| 223 /* | |
| 224 Redetect, now save all volumes for later | |
| 225 Update SDL_numcds just in case it changed | |
| 226 */ | |
| 227 { | |
| 228 int numVolumes = SDL_numcds; | |
| 229 | |
| 230 SDL_numcds = DetectAudioCDVolumes (volumes, numVolumes); | |
| 231 | |
| 232 /* If more cds suddenly show up, ignore them */ | |
| 233 if (SDL_numcds > numVolumes) { | |
| 234 SDL_SetError ("Some CD's were added but they will be ignored"); | |
| 235 SDL_numcds = numVolumes; | |
| 236 } | |
| 237 } | |
| 238 | |
| 239 return 0; | |
| 240 } | |
| 241 | |
| 242 /* Shutdown and cleanup */ | |
| 243 void SDL_SYS_CDQuit(void) | |
| 244 { | |
| 245 ReleaseFile(); | |
| 246 | |
| 247 if (volumes != NULL) | |
| 248 free (volumes); | |
| 249 | |
| 250 if (tracks != NULL) { | |
| 251 | |
| 252 FSRef **ptr; | |
| 253 for (ptr = tracks; *ptr != (FSRef*)-1; ptr++) | |
| 254 if (*ptr != NULL) | |
| 255 free (*ptr); | |
| 256 | |
| 257 free (tracks); | |
| 258 } | |
| 259 } | |
| 260 | |
| 261 /* Get the Unix disk name of the volume */ | |
| 262 static const char *SDL_SYS_CDName (int drive) | |
| 263 { | |
| 264 OSStatus err = noErr; | |
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265 HParamBlockRec pb; |
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266 GetVolParmsInfoBuffer volParmsInfo; |
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267 |
| 616 | 268 if (fakeCD) |
| 269 return "Fake CD-ROM Device"; | |
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270 |
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271 pb.ioParam.ioNamePtr = NULL; |
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272 pb.ioParam.ioVRefNum = volumes[drive]; |
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273 pb.ioParam.ioBuffer = (Ptr)&volParmsInfo; |
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274 pb.ioParam.ioReqCount = (SInt32)sizeof(volParmsInfo); |
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275 err = PBHGetVolParmsSync(&pb); |
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276 |
| 616 | 277 if (err != noErr) { |
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278 SDL_SetError ("PBHGetVolParmsSync returned %d", err); |
| 616 | 279 return NULL; |
| 280 } | |
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281 |
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282 return volParmsInfo.vMDeviceID; |
| 616 | 283 } |
| 284 | |
| 285 /* Open the "device" */ | |
| 286 static int SDL_SYS_CDOpen (int drive) | |
| 287 { | |
| 288 /* Only allow 1 device to be open */ | |
| 289 if (currentDrive >= 0) { | |
| 290 SDL_SetError ("Only one cdrom is supported"); | |
| 291 return -1; | |
| 292 } | |
| 293 else | |
| 294 currentDrive = drive; | |
| 295 | |
| 296 return drive; | |
| 297 } | |
| 298 | |
| 299 /* Get the table of contents */ | |
| 300 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom) | |
| 301 { | |
| 302 if (fakeCD) { | |
| 303 SDL_SetError (kErrorFakeDevice); | |
| 304 return -1; | |
| 305 } | |
| 306 | |
| 307 if (didReadTOC) { | |
| 308 cdrom->numtracks = cacheTOCNumTracks; | |
| 309 return 0; | |
| 310 } | |
| 311 | |
| 312 | |
| 313 ReadTOCData (volumes[cdrom->id], cdrom); | |
| 314 didReadTOC = SDL_TRUE; | |
| 315 cacheTOCNumTracks = cdrom->numtracks; | |
| 316 | |
| 317 return 0; | |
| 318 } | |
| 319 | |
| 320 /* Get CD-ROM status */ | |
| 321 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position) | |
| 322 { | |
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323 if (position) { |
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324 int trackFrame; |
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325 |
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326 Lock (); |
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327 trackFrame = GetCurrentFrame (); |
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328 Unlock (); |
| 616 | 329 |
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330 *position = cdrom->track[currentTrack].offset + trackFrame; |
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331 } |
| 616 | 332 |
| 333 return status; | |
| 334 } | |
| 335 | |
| 336 /* Start playback */ | |
| 337 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 338 { | |
| 339 int startFrame, stopFrame; | |
| 340 FSRef *ref; | |
| 341 | |
| 342 if (fakeCD) { | |
| 343 SDL_SetError (kErrorFakeDevice); | |
| 344 return -1; | |
| 345 } | |
| 346 | |
| 347 Lock(); | |
| 348 | |
| 349 if (LoadTracks (cdrom) < 0) | |
| 350 return -2; | |
| 351 | |
| 352 if (PauseFile () < 0) | |
| 353 return -3; | |
| 354 | |
| 355 if (ReleaseFile () < 0) | |
| 356 return -4; | |
| 357 | |
| 358 ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame); | |
| 359 if (ref == NULL) { | |
| 360 SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", start, length); | |
| 361 return -5; | |
| 362 } | |
| 363 | |
| 364 if (LoadFile (ref, startFrame, stopFrame) < 0) | |
| 365 return -6; | |
| 366 | |
| 367 SetCompletionProc (CompletionProc, cdrom); | |
| 368 | |
| 369 if (PlayFile () < 0) | |
| 370 return -7; | |
| 371 | |
| 372 status = CD_PLAYING; | |
| 373 | |
| 374 Unlock(); | |
| 375 | |
| 376 return 0; | |
| 377 } | |
| 378 | |
| 379 /* Pause playback */ | |
| 380 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 381 { | |
| 382 if (fakeCD) { | |
| 383 SDL_SetError (kErrorFakeDevice); | |
| 384 return -1; | |
| 385 } | |
| 386 | |
| 387 Lock (); | |
| 388 | |
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389 if (PauseFile () < 0) { |
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390 Unlock (); |
| 616 | 391 return -2; |
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392 } |
| 616 | 393 |
| 394 status = CD_PAUSED; | |
| 395 | |
| 396 Unlock (); | |
| 397 | |
| 398 return 0; | |
| 399 } | |
| 400 | |
| 401 /* Resume playback */ | |
| 402 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 403 { | |
| 404 if (fakeCD) { | |
| 405 SDL_SetError (kErrorFakeDevice); | |
| 406 return -1; | |
| 407 } | |
| 408 | |
| 409 Lock (); | |
| 410 | |
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411 if (PlayFile () < 0) { |
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412 Unlock (); |
| 616 | 413 return -2; |
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414 } |
| 616 | 415 |
| 416 status = CD_PLAYING; | |
| 417 | |
| 418 Unlock (); | |
| 419 | |
| 420 return 0; | |
| 421 } | |
| 422 | |
| 423 /* Stop playback */ | |
| 424 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 425 { | |
| 426 if (fakeCD) { | |
| 427 SDL_SetError (kErrorFakeDevice); | |
| 428 return -1; | |
| 429 } | |
| 430 | |
| 431 Lock (); | |
| 432 | |
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433 if (PauseFile () < 0) { |
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434 Unlock (); |
| 616 | 435 return -2; |
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436 } |
| 616 | 437 |
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438 if (ReleaseFile () < 0) { |
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439 Unlock (); |
| 616 | 440 return -3; |
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441 } |
| 616 | 442 |
| 443 status = CD_STOPPED; | |
| 444 | |
| 445 Unlock (); | |
| 446 | |
| 447 return 0; | |
| 448 } | |
| 449 | |
| 450 /* Eject the CD-ROM (Unmount the volume) */ | |
| 451 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 452 { | |
| 453 OSStatus err; | |
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454 HParamBlockRec pb; |
| 616 | 455 |
| 456 if (fakeCD) { | |
| 457 SDL_SetError (kErrorFakeDevice); | |
| 458 return -1; | |
| 459 } | |
| 460 | |
| 461 Lock (); | |
| 462 | |
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463 if (PauseFile () < 0) { |
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464 Unlock (); |
| 616 | 465 return -2; |
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466 } |
| 616 | 467 |
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468 if (ReleaseFile () < 0) { |
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469 Unlock (); |
| 616 | 470 return -3; |
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471 } |
| 616 | 472 |
| 473 status = CD_STOPPED; | |
| 474 | |
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475 /* Eject the volume */ |
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476 pb.ioParam.ioNamePtr = NULL; |
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477 pb.ioParam.ioVRefNum = volumes[cdrom->id]; |
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478 err = PBUnmountVol((ParamBlockRec *) &pb); |
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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 |