Mercurial > sdl-ios-xcode
annotate src/cdrom/macosx/SDL_syscdrom.c @ 1723:4bdbb9b2bd0a SDL-1.3
(none)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 06 Jul 2006 05:53:32 +0000 |
| parents | 4da1ee79c9af |
| children |
| 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) { |
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68 SDL_OutOfMemory(); |
| 616 | 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 |
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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 |
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129 PauseFile(); |
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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; | |
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138 Unlock(); |
| 616 | 139 return; |
| 140 } | |
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141 |
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142 LoadFile(file, startFrame, stopFrame); |
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143 |
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144 SetCompletionProc(CompletionProc, cdrom); |
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145 |
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146 PlayFile(); |
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147 } else { |
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148 |
| 616 | 149 /* Release the current file */ |
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150 PauseFile(); |
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151 ReleaseFile(); |
| 616 | 152 status = CD_STOPPED; |
| 153 } | |
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154 |
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155 Unlock(); |
| 616 | 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 */ |
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199 SDL_numcds = DetectAudioCDVolumes(NULL, 0); |
| 616 | 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 = (FSVolumeRefNum *) SDL_calloc(1, sizeof(*volumes) * SDL_numcds); |
| 616 | 216 if (volumes == NULL) { |
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217 SDL_OutOfMemory(); |
| 616 | 218 return -1; |
| 219 } | |
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220 |
| 616 | 221 /* Allocate space for tracks */ |
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222 tracks = (FSRef **) SDL_calloc(1, sizeof(*tracks) * (SDL_numcds + 1)); |
| 616 | 223 if (tracks == NULL) { |
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224 SDL_OutOfMemory(); |
| 616 | 225 return -1; |
| 226 } | |
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227 |
| 616 | 228 /* Mark the end of the tracks array */ |
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229 tracks[SDL_numcds] = (FSRef *) - 1; |
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230 |
| 616 | 231 /* |
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232 Redetect, now save all volumes for later |
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233 Update SDL_numcds just in case it changed |
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234 */ |
| 616 | 235 { |
| 236 int numVolumes = SDL_numcds; | |
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237 |
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238 SDL_numcds = DetectAudioCDVolumes(volumes, numVolumes); |
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239 |
| 616 | 240 /* If more cds suddenly show up, ignore them */ |
| 241 if (SDL_numcds > numVolumes) { | |
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242 SDL_SetError("Some CD's were added but they will be ignored"); |
| 616 | 243 SDL_numcds = numVolumes; |
| 244 } | |
| 245 } | |
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246 |
| 616 | 247 return 0; |
| 248 } | |
| 249 | |
| 250 /* Shutdown and cleanup */ | |
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251 void |
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252 SDL_SYS_CDQuit(void) |
| 616 | 253 { |
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254 ReleaseFile(); |
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255 |
| 616 | 256 if (volumes != NULL) |
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257 free(volumes); |
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258 |
| 616 | 259 if (tracks != NULL) { |
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260 |
| 616 | 261 FSRef **ptr; |
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262 for (ptr = tracks; *ptr != (FSRef *) - 1; ptr++) |
| 616 | 263 if (*ptr != NULL) |
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264 free(*ptr); |
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265 |
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266 free(tracks); |
| 616 | 267 } |
| 268 } | |
| 269 | |
| 270 /* Get the Unix disk name of the volume */ | |
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271 static const char * |
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272 SDL_SYS_CDName(int drive) |
| 616 | 273 { |
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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; |
| 616 | 293 } |
| 294 | |
| 295 /* Open the "device" */ | |
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296 static int |
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297 SDL_SYS_CDOpen(int drive) |
| 616 | 298 { |
| 299 /* Only allow 1 device to be open */ | |
| 300 if (currentDrive >= 0) { | |
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301 SDL_SetError("Only one cdrom is supported"); |
| 616 | 302 return -1; |
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303 } else |
| 616 | 304 currentDrive = drive; |
| 305 | |
| 306 return drive; | |
| 307 } | |
| 308 | |
| 309 /* Get the table of contents */ | |
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310 static int |
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311 SDL_SYS_CDGetTOC(SDL_CD * cdrom) |
| 616 | 312 { |
| 313 if (fakeCD) { | |
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314 SDL_SetError(kErrorFakeDevice); |
| 616 | 315 return -1; |
| 316 } | |
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317 |
| 616 | 318 if (didReadTOC) { |
| 319 cdrom->numtracks = cacheTOCNumTracks; | |
| 320 return 0; | |
| 321 } | |
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322 |
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323 |
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324 ReadTOCData(volumes[cdrom->id], cdrom); |
| 616 | 325 didReadTOC = SDL_TRUE; |
| 326 cacheTOCNumTracks = cdrom->numtracks; | |
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327 |
| 616 | 328 return 0; |
| 329 } | |
| 330 | |
| 331 /* Get CD-ROM status */ | |
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332 static CDstatus |
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333 SDL_SYS_CDStatus(SDL_CD * cdrom, int *position) |
| 616 | 334 { |
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335 if (position) { |
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336 int trackFrame; |
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337 |
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338 Lock(); |
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339 trackFrame = GetCurrentFrame(); |
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340 Unlock(); |
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341 |
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342 *position = cdrom->track[currentTrack].offset + trackFrame; |
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343 } |
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344 |
| 616 | 345 return status; |
| 346 } | |
| 347 | |
| 348 /* Start playback */ | |
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349 static int |
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350 SDL_SYS_CDPlay(SDL_CD * cdrom, int start, int length) |
| 616 | 351 { |
| 352 int startFrame, stopFrame; | |
| 353 FSRef *ref; | |
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354 |
| 616 | 355 if (fakeCD) { |
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356 SDL_SetError(kErrorFakeDevice); |
| 616 | 357 return -1; |
| 358 } | |
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359 |
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360 Lock(); |
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361 |
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362 if (LoadTracks(cdrom) < 0) |
| 616 | 363 return -2; |
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364 |
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365 if (PauseFile() < 0) |
| 616 | 366 return -3; |
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367 |
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368 if (ReleaseFile() < 0) |
| 616 | 369 return -4; |
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370 |
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371 ref = GetFileForOffset(cdrom, start, length, &startFrame, &stopFrame); |
| 616 | 372 if (ref == NULL) { |
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373 SDL_SetError("SDL_SYS_CDPlay: No file for start=%d, length=%d", |
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374 start, length); |
| 616 | 375 return -5; |
| 376 } | |
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377 |
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378 if (LoadFile(ref, startFrame, stopFrame) < 0) |
| 616 | 379 return -6; |
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380 |
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381 SetCompletionProc(CompletionProc, cdrom); |
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382 |
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383 if (PlayFile() < 0) |
| 616 | 384 return -7; |
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385 |
| 616 | 386 status = CD_PLAYING; |
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387 |
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388 Unlock(); |
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389 |
| 616 | 390 return 0; |
| 391 } | |
| 392 | |
| 393 /* Pause playback */ | |
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394 static int |
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395 SDL_SYS_CDPause(SDL_CD * cdrom) |
| 616 | 396 { |
| 397 if (fakeCD) { | |
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398 SDL_SetError(kErrorFakeDevice); |
| 616 | 399 return -1; |
| 400 } | |
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401 |
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402 Lock(); |
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403 |
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404 if (PauseFile() < 0) { |
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405 Unlock(); |
| 616 | 406 return -2; |
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407 } |
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408 |
| 616 | 409 status = CD_PAUSED; |
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410 |
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411 Unlock(); |
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412 |
| 616 | 413 return 0; |
| 414 } | |
| 415 | |
| 416 /* Resume playback */ | |
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417 static int |
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418 SDL_SYS_CDResume(SDL_CD * cdrom) |
| 616 | 419 { |
| 420 if (fakeCD) { | |
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421 SDL_SetError(kErrorFakeDevice); |
| 616 | 422 return -1; |
| 423 } | |
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424 |
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425 Lock(); |
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426 |
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427 if (PlayFile() < 0) { |
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428 Unlock(); |
| 616 | 429 return -2; |
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430 } |
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431 |
| 616 | 432 status = CD_PLAYING; |
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433 |
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434 Unlock(); |
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435 |
| 616 | 436 return 0; |
| 437 } | |
| 438 | |
| 439 /* Stop playback */ | |
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440 static int |
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441 SDL_SYS_CDStop(SDL_CD * cdrom) |
| 616 | 442 { |
| 443 if (fakeCD) { | |
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444 SDL_SetError(kErrorFakeDevice); |
| 616 | 445 return -1; |
| 446 } | |
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447 |
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448 Lock(); |
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449 |
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450 if (PauseFile() < 0) { |
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451 Unlock(); |
| 616 | 452 return -2; |
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453 } |
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454 |
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455 if (ReleaseFile() < 0) { |
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456 Unlock(); |
| 616 | 457 return -3; |
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458 } |
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459 |
| 616 | 460 status = CD_STOPPED; |
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461 |
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462 Unlock(); |
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463 |
| 616 | 464 return 0; |
| 465 } | |
| 466 | |
| 467 /* Eject the CD-ROM (Unmount the volume) */ | |
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468 static int |
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469 SDL_SYS_CDEject(SDL_CD * cdrom) |
| 616 | 470 { |
| 471 OSStatus err; | |
| 1659 | 472 pid_t dissenter; |
| 473 | |
| 616 | 474 if (fakeCD) { |
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475 SDL_SetError(kErrorFakeDevice); |
| 616 | 476 return -1; |
| 477 } | |
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478 |
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479 Lock(); |
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480 |
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481 if (PauseFile() < 0) { |
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482 Unlock(); |
| 616 | 483 return -2; |
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484 } |
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485 |
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486 if (ReleaseFile() < 0) { |
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487 Unlock(); |
| 616 | 488 return -3; |
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489 } |
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490 |
| 616 | 491 status = CD_STOPPED; |
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492 |
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493 /* Eject the volume */ |
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494 err = FSEjectVolumeSync(volumes[cdrom->id], kNilOptions, &dissenter); |
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495 |
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496 if (err != noErr) { |
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497 Unlock(); |
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498 SDL_SetError("PBUnmountVol returned %d", err); |
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499 return -4; |
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500 } |
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501 |
| 616 | 502 status = CD_TRAYEMPTY; |
| 503 | |
| 504 /* Invalidate volume and track info */ | |
| 505 volumes[cdrom->id] = 0; | |
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506 free(tracks[cdrom->id]); |
| 616 | 507 tracks[cdrom->id] = NULL; |
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508 |
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509 Unlock(); |
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510 |
| 616 | 511 return 0; |
| 512 } | |
| 513 | |
| 514 /* Close the CD-ROM */ | |
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515 static void |
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516 SDL_SYS_CDClose(SDL_CD * cdrom) |
| 616 | 517 { |
| 518 currentDrive = -1; | |
| 519 return; | |
| 520 } | |
| 521 | |
|
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522 #endif /* SDL_CDROM_MACOSX */ |
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523 /* vi: set ts=4 sw=4 expandtab: */ |