Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 4372:ca91f36ef3de SDL-1.2
1.2 branch: fixed assembly code register clobbering.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 01 Nov 2009 17:51:39 +0000 |
| parents | 386181851388 |
| children |
| rev | line source |
|---|---|
| 616 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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 { | |
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266 /* |
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267 * !!! FIXME: PBHGetVolParmsSync() is gone in 10.6, |
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268 * !!! FIXME: replaced with FSGetVolumeParms(), which |
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269 * !!! FIXME: isn't available before 10.5. :/ |
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270 */ |
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271 return "Mac OS X CD-ROM Device"; |
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272 |
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273 #if 0 |
| 616 | 274 OSStatus err = noErr; |
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275 HParamBlockRec pb; |
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276 GetVolParmsInfoBuffer volParmsInfo; |
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277 |
| 616 | 278 if (fakeCD) |
| 279 return "Fake CD-ROM Device"; | |
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280 |
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281 pb.ioParam.ioNamePtr = NULL; |
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282 pb.ioParam.ioVRefNum = volumes[drive]; |
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283 pb.ioParam.ioBuffer = (Ptr)&volParmsInfo; |
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284 pb.ioParam.ioReqCount = (SInt32)sizeof(volParmsInfo); |
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285 err = PBHGetVolParmsSync(&pb); |
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286 |
| 616 | 287 if (err != noErr) { |
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288 SDL_SetError ("PBHGetVolParmsSync returned %d", err); |
| 616 | 289 return NULL; |
| 290 } | |
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291 |
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292 return volParmsInfo.vMDeviceID; |
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293 #endif |
| 616 | 294 } |
| 295 | |
| 296 /* Open the "device" */ | |
| 297 static int SDL_SYS_CDOpen (int drive) | |
| 298 { | |
| 299 /* Only allow 1 device to be open */ | |
| 300 if (currentDrive >= 0) { | |
| 301 SDL_SetError ("Only one cdrom is supported"); | |
| 302 return -1; | |
| 303 } | |
| 304 else | |
| 305 currentDrive = drive; | |
| 306 | |
| 307 return drive; | |
| 308 } | |
| 309 | |
| 310 /* Get the table of contents */ | |
| 311 static int SDL_SYS_CDGetTOC (SDL_CD *cdrom) | |
| 312 { | |
| 313 if (fakeCD) { | |
| 314 SDL_SetError (kErrorFakeDevice); | |
| 315 return -1; | |
| 316 } | |
| 317 | |
| 318 if (didReadTOC) { | |
| 319 cdrom->numtracks = cacheTOCNumTracks; | |
| 320 return 0; | |
| 321 } | |
| 322 | |
| 323 | |
| 324 ReadTOCData (volumes[cdrom->id], cdrom); | |
| 325 didReadTOC = SDL_TRUE; | |
| 326 cacheTOCNumTracks = cdrom->numtracks; | |
| 327 | |
| 328 return 0; | |
| 329 } | |
| 330 | |
| 331 /* Get CD-ROM status */ | |
| 332 static CDstatus SDL_SYS_CDStatus (SDL_CD *cdrom, int *position) | |
| 333 { | |
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334 if (position) { |
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335 int trackFrame; |
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336 |
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337 Lock (); |
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338 trackFrame = GetCurrentFrame (); |
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339 Unlock (); |
| 616 | 340 |
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341 *position = cdrom->track[currentTrack].offset + trackFrame; |
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342 } |
| 616 | 343 |
| 344 return status; | |
| 345 } | |
| 346 | |
| 347 /* Start playback */ | |
| 348 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 349 { | |
| 350 int startFrame, stopFrame; | |
| 351 FSRef *ref; | |
| 352 | |
| 353 if (fakeCD) { | |
| 354 SDL_SetError (kErrorFakeDevice); | |
| 355 return -1; | |
| 356 } | |
| 357 | |
| 358 Lock(); | |
| 359 | |
| 360 if (LoadTracks (cdrom) < 0) | |
| 361 return -2; | |
| 362 | |
| 363 if (PauseFile () < 0) | |
| 364 return -3; | |
| 365 | |
| 366 if (ReleaseFile () < 0) | |
| 367 return -4; | |
| 368 | |
| 369 ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame); | |
| 370 if (ref == NULL) { | |
| 371 SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", start, length); | |
| 372 return -5; | |
| 373 } | |
| 374 | |
| 375 if (LoadFile (ref, startFrame, stopFrame) < 0) | |
| 376 return -6; | |
| 377 | |
| 378 SetCompletionProc (CompletionProc, cdrom); | |
| 379 | |
| 380 if (PlayFile () < 0) | |
| 381 return -7; | |
| 382 | |
| 383 status = CD_PLAYING; | |
| 384 | |
| 385 Unlock(); | |
| 386 | |
| 387 return 0; | |
| 388 } | |
| 389 | |
| 390 /* Pause playback */ | |
| 391 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 392 { | |
| 393 if (fakeCD) { | |
| 394 SDL_SetError (kErrorFakeDevice); | |
| 395 return -1; | |
| 396 } | |
| 397 | |
| 398 Lock (); | |
| 399 | |
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400 if (PauseFile () < 0) { |
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401 Unlock (); |
| 616 | 402 return -2; |
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403 } |
| 616 | 404 |
| 405 status = CD_PAUSED; | |
| 406 | |
| 407 Unlock (); | |
| 408 | |
| 409 return 0; | |
| 410 } | |
| 411 | |
| 412 /* Resume playback */ | |
| 413 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 414 { | |
| 415 if (fakeCD) { | |
| 416 SDL_SetError (kErrorFakeDevice); | |
| 417 return -1; | |
| 418 } | |
| 419 | |
| 420 Lock (); | |
| 421 | |
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1126
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Fix for bug reported by Michael Benfield on the SDL mailing list:
Ryan C. Gordon <icculus@icculus.org>
parents:
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422 if (PlayFile () < 0) { |
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768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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423 Unlock (); |
| 616 | 424 return -2; |
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768
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Max has been reworking this code so it works on MacOS X 10.1
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425 } |
| 616 | 426 |
| 427 status = CD_PLAYING; | |
| 428 | |
| 429 Unlock (); | |
| 430 | |
| 431 return 0; | |
| 432 } | |
| 433 | |
| 434 /* Stop playback */ | |
| 435 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 436 { | |
| 437 if (fakeCD) { | |
| 438 SDL_SetError (kErrorFakeDevice); | |
| 439 return -1; | |
| 440 } | |
| 441 | |
| 442 Lock (); | |
| 443 | |
|
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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444 if (PauseFile () < 0) { |
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de1b2c3063b9
Max has been reworking this code so it works on MacOS X 10.1
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parents:
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changeset
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445 Unlock (); |
| 616 | 446 return -2; |
|
768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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447 } |
| 616 | 448 |
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768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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449 if (ReleaseFile () < 0) { |
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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450 Unlock (); |
| 616 | 451 return -3; |
|
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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452 } |
| 616 | 453 |
| 454 status = CD_STOPPED; | |
| 455 | |
| 456 Unlock (); | |
| 457 | |
| 458 return 0; | |
| 459 } | |
| 460 | |
| 461 /* Eject the CD-ROM (Unmount the volume) */ | |
| 462 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 463 { | |
| 464 OSStatus err; | |
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1793
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Date: Mon, 8 May 2006 14:19:30 -0700
Sam Lantinga <slouken@libsdl.org>
parents:
1635
diff
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465 pid_t dissenter; |
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4d66375c2012
Date: Mon, 8 May 2006 14:19:30 -0700
Sam Lantinga <slouken@libsdl.org>
parents:
1635
diff
changeset
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466 |
| 616 | 467 if (fakeCD) { |
| 468 SDL_SetError (kErrorFakeDevice); | |
| 469 return -1; | |
| 470 } | |
| 471 | |
| 472 Lock (); | |
| 473 | |
|
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
616
diff
changeset
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474 if (PauseFile () < 0) { |
|
de1b2c3063b9
Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
616
diff
changeset
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475 Unlock (); |
| 616 | 476 return -2; |
|
768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
616
diff
changeset
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477 } |
| 616 | 478 |
|
768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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479 if (ReleaseFile () < 0) { |
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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480 Unlock (); |
| 616 | 481 return -3; |
|
768
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
616
diff
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482 } |
| 616 | 483 |
| 484 status = CD_STOPPED; | |
| 485 | |
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1487
dc6b59e925a2
Cleaning up warnings on MacOS X
Sam Lantinga <slouken@libsdl.org>
parents:
1402
diff
changeset
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486 /* Eject the volume */ |
|
1793
4d66375c2012
Date: Mon, 8 May 2006 14:19:30 -0700
Sam Lantinga <slouken@libsdl.org>
parents:
1635
diff
changeset
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487 err = FSEjectVolumeSync(volumes[cdrom->id], kNilOptions, &dissenter); |
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768
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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488 |
|
de1b2c3063b9
Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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489 if (err != noErr) { |
|
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Max has been reworking this code so it works on MacOS X 10.1
Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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490 Unlock (); |
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
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491 SDL_SetError ("PBUnmountVol returned %d", err); |
|
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parents:
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492 return -4; |
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parents:
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493 } |
| 616 | 494 |
| 495 status = CD_TRAYEMPTY; | |
| 496 | |
| 497 /* Invalidate volume and track info */ | |
| 498 volumes[cdrom->id] = 0; | |
| 499 free (tracks[cdrom->id]); | |
| 500 tracks[cdrom->id] = NULL; | |
| 501 | |
| 502 Unlock (); | |
| 503 | |
| 504 return 0; | |
| 505 } | |
| 506 | |
| 507 /* Close the CD-ROM */ | |
| 508 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 509 { | |
| 510 currentDrive = -1; | |
| 511 return; | |
| 512 } | |
| 513 | |
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Make sure code is only compiled if the appropriate subsystem is enabled
Sam Lantinga <slouken@libsdl.org>
parents:
1487
diff
changeset
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514 #endif /* SDL_CDROM_MACOSX */ |