Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 1662:782fd950bd46 SDL-1.3
Revamp of the video system in progress - adding support for multiple displays, multiple windows, and a full video mode selection API.
WARNING: None of the video drivers have been updated for the new API yet! The API is still under design and very fluid.
The code is now run through a consistent indent format:
indent -i4 -nut -nsc -br -ce
The headers are being converted to automatically generate doxygen documentation.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 28 May 2006 13:04:16 +0000 |
| parents | 14717b52abc0 |
| children | 4da1ee79c9af |
| 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 | |
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30 static FSRef **tracks; |
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31 static FSVolumeRefNum *volumes; |
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32 static CDstatus status; |
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33 static int nextTrackFrame; |
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34 static int nextTrackFramesRemaining; |
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35 static int fakeCD; |
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36 static int currentTrack; |
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37 static int didReadTOC; |
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38 static int cacheTOCNumTracks; |
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39 static int currentDrive; /* Only allow 1 drive in use at a time */ |
| 616 | 40 |
| 41 #pragma mark -- Prototypes -- | |
| 42 | |
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43 static const char *SDL_SYS_CDName (int drive); |
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44 static int SDL_SYS_CDOpen (int drive); |
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45 static int SDL_SYS_CDGetTOC (SDL_CD * cdrom); |
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46 static CDstatus SDL_SYS_CDStatus (SDL_CD * cdrom, int *position); |
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47 static int SDL_SYS_CDPlay (SDL_CD * cdrom, int start, int length); |
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48 static int SDL_SYS_CDPause (SDL_CD * cdrom); |
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49 static int SDL_SYS_CDResume (SDL_CD * cdrom); |
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50 static int SDL_SYS_CDStop (SDL_CD * cdrom); |
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51 static int SDL_SYS_CDEject (SDL_CD * cdrom); |
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52 static void SDL_SYS_CDClose (SDL_CD * cdrom); |
| 616 | 53 |
| 54 #pragma mark -- Helper Functions -- | |
| 55 | |
| 56 /* Read a list of tracks from the volume */ | |
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57 static int |
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58 LoadTracks (SDL_CD * cdrom) |
| 616 | 59 { |
| 60 /* Check if tracks are already loaded */ | |
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61 if (tracks[cdrom->id] != NULL) |
| 616 | 62 return 0; |
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63 |
| 616 | 64 /* Allocate memory for tracks */ |
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65 tracks[cdrom->id] = |
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66 (FSRef *) SDL_calloc (1, sizeof (**tracks) * cdrom->numtracks); |
| 616 | 67 if (tracks[cdrom->id] == NULL) { |
| 68 SDL_OutOfMemory (); | |
| 69 return -1; | |
| 70 } | |
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71 |
| 616 | 72 /* Load tracks */ |
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73 if (ListTrackFiles |
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74 (volumes[cdrom->id], tracks[cdrom->id], cdrom->numtracks) < 0) |
| 616 | 75 return -1; |
| 76 | |
| 77 return 0; | |
| 78 } | |
| 79 | |
| 80 /* Find a file for a given start frame and length */ | |
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81 static FSRef * |
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82 GetFileForOffset (SDL_CD * cdrom, int start, int length, int *outStartFrame, |
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83 int *outStopFrame) |
| 616 | 84 { |
| 85 int i; | |
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86 |
| 616 | 87 for (i = 0; i < cdrom->numtracks; i++) { |
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88 |
| 616 | 89 if (cdrom->track[i].offset <= start && |
| 90 start < (cdrom->track[i].offset + cdrom->track[i].length)) | |
| 91 break; | |
| 92 } | |
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93 |
| 616 | 94 if (i == cdrom->numtracks) |
| 95 return NULL; | |
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96 |
| 616 | 97 currentTrack = i; |
| 98 | |
| 99 *outStartFrame = start - cdrom->track[i].offset; | |
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100 |
| 616 | 101 if ((*outStartFrame + length) < cdrom->track[i].length) { |
| 102 *outStopFrame = *outStartFrame + length; | |
| 103 length = 0; | |
| 104 nextTrackFrame = -1; | |
| 105 nextTrackFramesRemaining = -1; | |
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106 } else { |
| 616 | 107 *outStopFrame = -1; |
| 108 length -= cdrom->track[i].length - *outStartFrame; | |
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109 nextTrackFrame = cdrom->track[i + 1].offset; |
| 616 | 110 nextTrackFramesRemaining = length; |
| 111 } | |
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112 |
| 616 | 113 return &tracks[cdrom->id][i]; |
| 114 } | |
| 115 | |
| 116 /* Setup another file for playback, or stop playback (called from another thread) */ | |
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117 static void |
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118 CompletionProc (SDL_CD * cdrom) |
| 616 | 119 { |
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120 |
| 616 | 121 Lock (); |
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122 |
| 616 | 123 if (nextTrackFrame > 0 && nextTrackFramesRemaining > 0) { |
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124 |
| 616 | 125 /* Load the next file to play */ |
| 126 int startFrame, stopFrame; | |
| 127 FSRef *file; | |
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128 |
| 616 | 129 PauseFile (); |
| 130 ReleaseFile (); | |
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131 |
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132 file = GetFileForOffset (cdrom, nextTrackFrame, |
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133 nextTrackFramesRemaining, &startFrame, |
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134 &stopFrame); |
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135 |
| 616 | 136 if (file == NULL) { |
| 137 status = CD_STOPPED; | |
| 138 Unlock (); | |
| 139 return; | |
| 140 } | |
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141 |
| 616 | 142 LoadFile (file, startFrame, stopFrame); |
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143 |
| 616 | 144 SetCompletionProc (CompletionProc, cdrom); |
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145 |
| 616 | 146 PlayFile (); |
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147 } else { |
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148 |
| 616 | 149 /* Release the current file */ |
| 150 PauseFile (); | |
| 151 ReleaseFile (); | |
| 152 status = CD_STOPPED; | |
| 153 } | |
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154 |
| 616 | 155 Unlock (); |
| 156 } | |
| 157 | |
| 158 | |
| 159 #pragma mark -- Driver Functions -- | |
| 160 | |
| 161 /* Initialize */ | |
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162 int |
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163 SDL_SYS_CDInit (void) |
| 616 | 164 { |
| 165 /* Initialize globals */ | |
| 166 volumes = NULL; | |
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167 tracks = NULL; |
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168 status = CD_STOPPED; |
| 616 | 169 nextTrackFrame = -1; |
| 170 nextTrackFramesRemaining = -1; | |
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171 fakeCD = SDL_FALSE; |
| 616 | 172 currentTrack = -1; |
| 173 didReadTOC = SDL_FALSE; | |
| 174 cacheTOCNumTracks = -1; | |
| 175 currentDrive = -1; | |
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176 |
| 616 | 177 /* Fill in function pointers */ |
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178 SDL_CDcaps.Name = SDL_SYS_CDName; |
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179 SDL_CDcaps.Open = SDL_SYS_CDOpen; |
| 616 | 180 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
| 181 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
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182 SDL_CDcaps.Play = SDL_SYS_CDPlay; |
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183 SDL_CDcaps.Pause = SDL_SYS_CDPause; |
| 616 | 184 SDL_CDcaps.Resume = SDL_SYS_CDResume; |
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185 SDL_CDcaps.Stop = SDL_SYS_CDStop; |
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186 SDL_CDcaps.Eject = SDL_SYS_CDEject; |
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187 SDL_CDcaps.Close = SDL_SYS_CDClose; |
| 616 | 188 |
| 189 /* | |
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190 Read the list of "drives" |
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191 |
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192 This is currently a hack that infers drives from |
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193 mounted audio CD volumes, rather than |
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194 actual CD-ROM devices - which means it may not |
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195 act as expected sometimes. |
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196 */ |
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197 |
| 616 | 198 /* Find out how many cd volumes are mounted */ |
| 199 SDL_numcds = DetectAudioCDVolumes (NULL, 0); | |
| 200 | |
| 201 /* | |
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202 If there are no volumes, fake a cd device |
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203 so tray empty can be reported. |
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204 */ |
| 616 | 205 if (SDL_numcds == 0) { |
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206 |
| 616 | 207 fakeCD = SDL_TRUE; |
| 208 SDL_numcds = 1; | |
| 209 status = CD_TRAYEMPTY; | |
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210 |
| 616 | 211 return 0; |
| 212 } | |
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213 |
| 616 | 214 /* Allocate space for volumes */ |
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215 volumes = |
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216 (FSVolumeRefNum *) SDL_calloc (1, sizeof (*volumes) * SDL_numcds); |
| 616 | 217 if (volumes == NULL) { |
| 218 SDL_OutOfMemory (); | |
| 219 return -1; | |
| 220 } | |
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221 |
| 616 | 222 /* Allocate space for tracks */ |
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223 tracks = (FSRef **) SDL_calloc (1, sizeof (*tracks) * (SDL_numcds + 1)); |
| 616 | 224 if (tracks == NULL) { |
| 225 SDL_OutOfMemory (); | |
| 226 return -1; | |
| 227 } | |
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228 |
| 616 | 229 /* Mark the end of the tracks array */ |
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230 tracks[SDL_numcds] = (FSRef *) - 1; |
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231 |
| 616 | 232 /* |
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233 Redetect, now save all volumes for later |
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234 Update SDL_numcds just in case it changed |
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235 */ |
| 616 | 236 { |
| 237 int numVolumes = SDL_numcds; | |
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238 |
| 616 | 239 SDL_numcds = DetectAudioCDVolumes (volumes, numVolumes); |
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240 |
| 616 | 241 /* If more cds suddenly show up, ignore them */ |
| 242 if (SDL_numcds > numVolumes) { | |
| 243 SDL_SetError ("Some CD's were added but they will be ignored"); | |
| 244 SDL_numcds = numVolumes; | |
| 245 } | |
| 246 } | |
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247 |
| 616 | 248 return 0; |
| 249 } | |
| 250 | |
| 251 /* Shutdown and cleanup */ | |
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252 void |
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253 SDL_SYS_CDQuit (void) |
| 616 | 254 { |
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255 ReleaseFile (); |
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256 |
| 616 | 257 if (volumes != NULL) |
| 258 free (volumes); | |
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259 |
| 616 | 260 if (tracks != NULL) { |
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261 |
| 616 | 262 FSRef **ptr; |
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263 for (ptr = tracks; *ptr != (FSRef *) - 1; ptr++) |
| 616 | 264 if (*ptr != NULL) |
| 265 free (*ptr); | |
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266 |
| 616 | 267 free (tracks); |
| 268 } | |
| 269 } | |
| 270 | |
| 271 /* Get the Unix disk name of the volume */ | |
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272 static const char * |
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273 SDL_SYS_CDName (int drive) |
| 616 | 274 { |
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275 OSStatus err = noErr; |
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276 HParamBlockRec pb; |
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277 GetVolParmsInfoBuffer volParmsInfo; |
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278 |
| 616 | 279 if (fakeCD) |
| 280 return "Fake CD-ROM Device"; | |
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281 |
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282 pb.ioParam.ioNamePtr = NULL; |
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283 pb.ioParam.ioVRefNum = volumes[drive]; |
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284 pb.ioParam.ioBuffer = (Ptr) & volParmsInfo; |
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285 pb.ioParam.ioReqCount = (SInt32) sizeof (volParmsInfo); |
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286 err = PBHGetVolParmsSync (&pb); |
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287 |
| 616 | 288 if (err != noErr) { |
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289 SDL_SetError ("PBHGetVolParmsSync returned %d", err); |
| 616 | 290 return NULL; |
| 291 } | |
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292 |
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293 return volParmsInfo.vMDeviceID; |
| 616 | 294 } |
| 295 | |
| 296 /* Open the "device" */ | |
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297 static int |
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298 SDL_SYS_CDOpen (int drive) |
| 616 | 299 { |
| 300 /* Only allow 1 device to be open */ | |
| 301 if (currentDrive >= 0) { | |
| 302 SDL_SetError ("Only one cdrom is supported"); | |
| 303 return -1; | |
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304 } else |
| 616 | 305 currentDrive = drive; |
| 306 | |
| 307 return drive; | |
| 308 } | |
| 309 | |
| 310 /* Get the table of contents */ | |
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311 static int |
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312 SDL_SYS_CDGetTOC (SDL_CD * cdrom) |
| 616 | 313 { |
| 314 if (fakeCD) { | |
| 315 SDL_SetError (kErrorFakeDevice); | |
| 316 return -1; | |
| 317 } | |
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318 |
| 616 | 319 if (didReadTOC) { |
| 320 cdrom->numtracks = cacheTOCNumTracks; | |
| 321 return 0; | |
| 322 } | |
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323 |
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324 |
| 616 | 325 ReadTOCData (volumes[cdrom->id], cdrom); |
| 326 didReadTOC = SDL_TRUE; | |
| 327 cacheTOCNumTracks = cdrom->numtracks; | |
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328 |
| 616 | 329 return 0; |
| 330 } | |
| 331 | |
| 332 /* Get CD-ROM status */ | |
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333 static CDstatus |
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334 SDL_SYS_CDStatus (SDL_CD * cdrom, int *position) |
| 616 | 335 { |
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336 if (position) { |
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337 int trackFrame; |
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338 |
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339 Lock (); |
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340 trackFrame = GetCurrentFrame (); |
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341 Unlock (); |
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342 |
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343 *position = cdrom->track[currentTrack].offset + trackFrame; |
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344 } |
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345 |
| 616 | 346 return status; |
| 347 } | |
| 348 | |
| 349 /* Start playback */ | |
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350 static int |
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351 SDL_SYS_CDPlay (SDL_CD * cdrom, int start, int length) |
| 616 | 352 { |
| 353 int startFrame, stopFrame; | |
| 354 FSRef *ref; | |
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355 |
| 616 | 356 if (fakeCD) { |
| 357 SDL_SetError (kErrorFakeDevice); | |
| 358 return -1; | |
| 359 } | |
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360 |
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361 Lock (); |
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362 |
| 616 | 363 if (LoadTracks (cdrom) < 0) |
| 364 return -2; | |
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365 |
| 616 | 366 if (PauseFile () < 0) |
| 367 return -3; | |
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368 |
| 616 | 369 if (ReleaseFile () < 0) |
| 370 return -4; | |
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371 |
| 616 | 372 ref = GetFileForOffset (cdrom, start, length, &startFrame, &stopFrame); |
| 373 if (ref == NULL) { | |
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374 SDL_SetError ("SDL_SYS_CDPlay: No file for start=%d, length=%d", |
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375 start, length); |
| 616 | 376 return -5; |
| 377 } | |
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378 |
| 616 | 379 if (LoadFile (ref, startFrame, stopFrame) < 0) |
| 380 return -6; | |
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381 |
| 616 | 382 SetCompletionProc (CompletionProc, cdrom); |
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383 |
| 616 | 384 if (PlayFile () < 0) |
| 385 return -7; | |
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386 |
| 616 | 387 status = CD_PLAYING; |
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388 |
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389 Unlock (); |
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390 |
| 616 | 391 return 0; |
| 392 } | |
| 393 | |
| 394 /* Pause playback */ | |
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395 static int |
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396 SDL_SYS_CDPause (SDL_CD * cdrom) |
| 616 | 397 { |
| 398 if (fakeCD) { | |
| 399 SDL_SetError (kErrorFakeDevice); | |
| 400 return -1; | |
| 401 } | |
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402 |
| 616 | 403 Lock (); |
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404 |
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405 if (PauseFile () < 0) { |
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406 Unlock (); |
| 616 | 407 return -2; |
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408 } |
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409 |
| 616 | 410 status = CD_PAUSED; |
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411 |
| 616 | 412 Unlock (); |
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413 |
| 616 | 414 return 0; |
| 415 } | |
| 416 | |
| 417 /* Resume playback */ | |
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418 static int |
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419 SDL_SYS_CDResume (SDL_CD * cdrom) |
| 616 | 420 { |
| 421 if (fakeCD) { | |
| 422 SDL_SetError (kErrorFakeDevice); | |
| 423 return -1; | |
| 424 } | |
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425 |
| 616 | 426 Lock (); |
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427 |
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428 if (PlayFile () < 0) { |
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429 Unlock (); |
| 616 | 430 return -2; |
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431 } |
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432 |
| 616 | 433 status = CD_PLAYING; |
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434 |
| 616 | 435 Unlock (); |
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436 |
| 616 | 437 return 0; |
| 438 } | |
| 439 | |
| 440 /* Stop playback */ | |
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441 static int |
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442 SDL_SYS_CDStop (SDL_CD * cdrom) |
| 616 | 443 { |
| 444 if (fakeCD) { | |
| 445 SDL_SetError (kErrorFakeDevice); | |
| 446 return -1; | |
| 447 } | |
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448 |
| 616 | 449 Lock (); |
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450 |
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451 if (PauseFile () < 0) { |
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452 Unlock (); |
| 616 | 453 return -2; |
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454 } |
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455 |
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456 if (ReleaseFile () < 0) { |
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457 Unlock (); |
| 616 | 458 return -3; |
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459 } |
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460 |
| 616 | 461 status = CD_STOPPED; |
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462 |
| 616 | 463 Unlock (); |
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464 |
| 616 | 465 return 0; |
| 466 } | |
| 467 | |
| 468 /* Eject the CD-ROM (Unmount the volume) */ | |
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469 static int |
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470 SDL_SYS_CDEject (SDL_CD * cdrom) |
| 616 | 471 { |
| 472 OSStatus err; | |
| 1659 | 473 pid_t dissenter; |
| 474 | |
| 616 | 475 if (fakeCD) { |
| 476 SDL_SetError (kErrorFakeDevice); | |
| 477 return -1; | |
| 478 } | |
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479 |
| 616 | 480 Lock (); |
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481 |
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482 if (PauseFile () < 0) { |
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483 Unlock (); |
| 616 | 484 return -2; |
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485 } |
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486 |
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487 if (ReleaseFile () < 0) { |
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488 Unlock (); |
| 616 | 489 return -3; |
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490 } |
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491 |
| 616 | 492 status = CD_STOPPED; |
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493 |
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494 /* Eject the volume */ |
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495 err = FSEjectVolumeSync (volumes[cdrom->id], kNilOptions, &dissenter); |
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496 |
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497 if (err != noErr) { |
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498 Unlock (); |
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499 SDL_SetError ("PBUnmountVol returned %d", err); |
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500 return -4; |
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501 } |
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502 |
| 616 | 503 status = CD_TRAYEMPTY; |
| 504 | |
| 505 /* Invalidate volume and track info */ | |
| 506 volumes[cdrom->id] = 0; | |
| 507 free (tracks[cdrom->id]); | |
| 508 tracks[cdrom->id] = NULL; | |
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509 |
| 616 | 510 Unlock (); |
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511 |
| 616 | 512 return 0; |
| 513 } | |
| 514 | |
| 515 /* Close the CD-ROM */ | |
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516 static void |
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517 SDL_SYS_CDClose (SDL_CD * cdrom) |
| 616 | 518 { |
| 519 currentDrive = -1; | |
| 520 return; | |
| 521 } | |
| 522 | |
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523 #endif /* SDL_CDROM_MACOSX */ |
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524 /* vi: set ts=4 sw=4 expandtab: */ |