Mercurial > sdl-ios-xcode
annotate src/cdrom/SDL_cdrom.c @ 1359:1e4ba2e063b4
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 07:03:22 +0000 |
| parents | c71e05b4dc2e |
| children | d910939febfa |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
|
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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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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Sam Lantinga <slouken@libsdl.org>
parents:
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diff
changeset
|
13 Lesser General Public License for more details. |
| 0 | 14 |
|
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
15 You should have received a copy of the GNU Lesser General Public |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
16 License along with this library; if not, write to the Free Software |
|
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* This is the CD-audio control API for Simple DirectMedia Layer */ | |
| 24 | |
| 25 #include "SDL_cdrom.h" | |
| 26 #include "SDL_syscdrom.h" | |
| 27 | |
| 28 #if !defined(macintosh) | |
| 29 #define CLIP_FRAMES 10 /* Some CD-ROMs won't go all the way */ | |
| 30 #endif | |
| 31 | |
| 32 static int SDL_cdinitted = 0; | |
| 33 static SDL_CD *default_cdrom; | |
| 34 | |
| 35 /* The system level CD-ROM control functions */ | |
| 36 struct CDcaps SDL_CDcaps = { | |
| 37 NULL, /* Name */ | |
| 38 NULL, /* Open */ | |
| 39 NULL, /* GetTOC */ | |
| 40 NULL, /* Status */ | |
| 41 NULL, /* Play */ | |
| 42 NULL, /* Pause */ | |
| 43 NULL, /* Resume */ | |
| 44 NULL, /* Stop */ | |
| 45 NULL, /* Eject */ | |
| 46 NULL, /* Close */ | |
| 47 }; | |
| 48 int SDL_numcds; | |
| 49 | |
| 50 int SDL_CDROMInit(void) | |
| 51 { | |
| 52 int retval; | |
| 53 | |
| 54 SDL_numcds = 0; | |
| 55 retval = SDL_SYS_CDInit(); | |
| 56 if ( retval == 0 ) { | |
| 57 SDL_cdinitted = 1; | |
| 58 } | |
| 59 default_cdrom = NULL; | |
| 60 return(retval); | |
| 61 } | |
| 62 | |
| 63 /* Check to see if the CD-ROM subsystem has been initialized */ | |
| 64 static int CheckInit(int check_cdrom, SDL_CD **cdrom) | |
| 65 { | |
| 66 int okay; | |
| 67 | |
| 68 okay = SDL_cdinitted; | |
| 69 if ( check_cdrom && (*cdrom == NULL) ) { | |
| 70 *cdrom = default_cdrom; | |
| 71 if ( *cdrom == NULL ) { | |
| 72 SDL_SetError("CD-ROM not opened"); | |
| 73 okay = 0; | |
| 74 } | |
| 75 } | |
| 76 if ( ! SDL_cdinitted ) { | |
| 77 SDL_SetError("CD-ROM subsystem not initialized"); | |
| 78 } | |
| 79 return(okay); | |
| 80 } | |
| 81 | |
| 82 int SDL_CDNumDrives(void) | |
| 83 { | |
| 84 if ( ! CheckInit(0, NULL) ) { | |
| 85 return(-1); | |
| 86 } | |
| 87 return(SDL_numcds); | |
| 88 } | |
| 89 | |
| 90 const char *SDL_CDName(int drive) | |
| 91 { | |
| 92 if ( ! CheckInit(0, NULL) ) { | |
| 93 return(NULL); | |
| 94 } | |
| 95 if ( drive >= SDL_numcds ) { | |
| 96 SDL_SetError("Invalid CD-ROM drive index"); | |
| 97 return(NULL); | |
| 98 } | |
| 99 if ( SDL_CDcaps.Name ) { | |
| 100 return(SDL_CDcaps.Name(drive)); | |
| 101 } else { | |
| 102 return(""); | |
| 103 } | |
| 104 } | |
| 105 | |
| 106 SDL_CD *SDL_CDOpen(int drive) | |
| 107 { | |
| 108 struct SDL_CD *cdrom; | |
| 109 | |
| 110 if ( ! CheckInit(0, NULL) ) { | |
| 111 return(NULL); | |
| 112 } | |
| 113 if ( drive >= SDL_numcds ) { | |
| 114 SDL_SetError("Invalid CD-ROM drive index"); | |
| 115 return(NULL); | |
| 116 } | |
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117 cdrom = (SDL_CD *)SDL_malloc(sizeof(*cdrom)); |
| 0 | 118 if ( cdrom == NULL ) { |
| 119 SDL_OutOfMemory(); | |
| 120 return(NULL); | |
| 121 } | |
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122 SDL_memset(cdrom, 0, sizeof(*cdrom)); |
| 0 | 123 cdrom->id = SDL_CDcaps.Open(drive); |
| 124 if ( cdrom->id < 0 ) { | |
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125 SDL_free(cdrom); |
| 0 | 126 return(NULL); |
| 127 } | |
| 128 default_cdrom = cdrom; | |
| 129 return(cdrom); | |
| 130 } | |
| 131 | |
| 132 CDstatus SDL_CDStatus(SDL_CD *cdrom) | |
| 133 { | |
| 134 CDstatus status; | |
| 135 int i; | |
| 136 Uint32 position; | |
| 137 | |
| 138 /* Check if the CD-ROM subsystem has been initialized */ | |
| 139 if ( ! CheckInit(1, &cdrom) ) { | |
| 140 return(CD_ERROR); | |
| 141 } | |
| 142 | |
| 143 /* Get the current status of the drive */ | |
| 144 cdrom->numtracks = 0; | |
| 145 cdrom->cur_track = 0; | |
| 146 cdrom->cur_frame = 0; | |
| 147 status = SDL_CDcaps.Status(cdrom, &i); | |
| 148 position = (Uint32)i; | |
| 149 cdrom->status = status; | |
| 150 | |
| 151 /* Get the table of contents, if there's a CD available */ | |
| 152 if ( CD_INDRIVE(status) ) { | |
| 153 if ( SDL_CDcaps.GetTOC(cdrom) < 0 ) { | |
| 154 status = CD_ERROR; | |
| 155 } | |
| 156 /* If the drive is playing, get current play position */ | |
| 157 if ( (status == CD_PLAYING) || (status == CD_PAUSED) ) { | |
| 158 for ( i=1; cdrom->track[i].offset <= position; ++i ) { | |
| 159 /* Keep looking */; | |
| 160 } | |
| 161 #ifdef DEBUG_CDROM | |
| 162 fprintf(stderr, "Current position: %d, track = %d (offset is %d)\n", | |
| 163 position, i-1, cdrom->track[i-1].offset); | |
| 164 #endif | |
| 165 cdrom->cur_track = i-1; | |
| 166 position -= cdrom->track[cdrom->cur_track].offset; | |
| 167 cdrom->cur_frame = position; | |
| 168 } | |
| 169 } | |
| 170 return(status); | |
| 171 } | |
| 172 | |
| 173 int SDL_CDPlayTracks(SDL_CD *cdrom, | |
| 174 int strack, int sframe, int ntracks, int nframes) | |
| 175 { | |
| 176 int etrack, eframe; | |
| 177 int start, length; | |
| 178 | |
| 179 /* Check if the CD-ROM subsystem has been initialized */ | |
| 180 if ( ! CheckInit(1, &cdrom) ) { | |
| 181 return(CD_ERROR); | |
| 182 } | |
| 183 | |
| 184 /* Determine the starting and ending tracks */ | |
| 185 if ( (strack < 0) || (strack >= cdrom->numtracks) ) { | |
| 186 SDL_SetError("Invalid starting track"); | |
| 187 return(CD_ERROR); | |
| 188 } | |
| 189 if ( ! ntracks && ! nframes ) { | |
| 190 etrack = cdrom->numtracks; | |
| 191 eframe = 0; | |
| 192 } else { | |
| 193 etrack = strack+ntracks; | |
| 194 if ( etrack == strack ) { | |
| 195 eframe = sframe + nframes; | |
| 196 } else { | |
| 197 eframe = nframes; | |
| 198 } | |
| 199 } | |
| 200 if ( etrack > cdrom->numtracks ) { | |
| 201 SDL_SetError("Invalid play length"); | |
| 202 return(CD_ERROR); | |
| 203 } | |
| 204 | |
| 205 /* Skip data tracks and verify frame offsets */ | |
| 206 while ( (strack <= etrack) && | |
| 207 (cdrom->track[strack].type == SDL_DATA_TRACK) ) { | |
| 208 ++strack; | |
| 209 } | |
| 210 if ( sframe >= (int)cdrom->track[strack].length ) { | |
| 211 SDL_SetError("Invalid starting frame for track %d", strack); | |
| 212 return(CD_ERROR); | |
| 213 } | |
| 214 while ( (etrack > strack) && | |
| 215 (cdrom->track[etrack-1].type == SDL_DATA_TRACK) ) { | |
| 216 --etrack; | |
| 217 } | |
| 218 if ( eframe > (int)cdrom->track[etrack].length ) { | |
| 219 SDL_SetError("Invalid ending frame for track %d", etrack); | |
| 220 return(CD_ERROR); | |
| 221 } | |
| 222 | |
| 223 /* Determine start frame and play length */ | |
| 224 start = (cdrom->track[strack].offset+sframe); | |
| 225 length = (cdrom->track[etrack].offset+eframe)-start; | |
| 226 #ifdef CLIP_FRAMES | |
| 227 /* I've never seen this necessary, but xmcd does it.. */ | |
| 228 length -= CLIP_FRAMES; /* CLIP_FRAMES == 10 */ | |
| 229 #endif | |
| 230 if ( length < 0 ) { | |
| 231 return(0); | |
| 232 } | |
| 233 | |
| 234 /* Play! */ | |
| 235 #ifdef DEBUG_CDROM | |
| 236 fprintf(stderr, "Playing %d frames at offset %d\n", length, start); | |
| 237 #endif | |
| 238 return(SDL_CDcaps.Play(cdrom, start, length)); | |
| 239 } | |
| 240 | |
| 241 int SDL_CDPlay(SDL_CD *cdrom, int sframe, int length) | |
| 242 { | |
| 243 /* Check if the CD-ROM subsystem has been initialized */ | |
| 244 if ( ! CheckInit(1, &cdrom) ) { | |
| 245 return(CD_ERROR); | |
| 246 } | |
| 247 | |
| 248 return(SDL_CDcaps.Play(cdrom, sframe, length)); | |
| 249 } | |
| 250 | |
| 251 int SDL_CDPause(SDL_CD *cdrom) | |
| 252 { | |
| 253 CDstatus status; | |
| 254 int retval; | |
| 255 | |
| 256 /* Check if the CD-ROM subsystem has been initialized */ | |
| 257 if ( ! CheckInit(1, &cdrom) ) { | |
| 258 return(CD_ERROR); | |
| 259 } | |
| 260 | |
| 261 status = SDL_CDcaps.Status(cdrom, NULL); | |
| 262 switch (status) { | |
| 263 case CD_PLAYING: | |
| 264 retval = SDL_CDcaps.Pause(cdrom); | |
| 265 break; | |
| 266 default: | |
| 267 retval = 0; | |
| 268 break; | |
| 269 } | |
| 270 return(retval); | |
| 271 } | |
| 272 | |
| 273 int SDL_CDResume(SDL_CD *cdrom) | |
| 274 { | |
| 275 CDstatus status; | |
| 276 int retval; | |
| 277 | |
| 278 /* Check if the CD-ROM subsystem has been initialized */ | |
| 279 if ( ! CheckInit(1, &cdrom) ) { | |
| 280 return(CD_ERROR); | |
| 281 } | |
| 282 | |
| 283 status = SDL_CDcaps.Status(cdrom, NULL); | |
| 284 switch (status) { | |
| 285 case CD_PAUSED: | |
| 286 retval = SDL_CDcaps.Resume(cdrom); | |
| 287 default: | |
| 288 retval = 0; | |
| 289 break; | |
| 290 } | |
| 291 return(retval); | |
| 292 } | |
| 293 | |
| 294 int SDL_CDStop(SDL_CD *cdrom) | |
| 295 { | |
| 296 CDstatus status; | |
| 297 int retval; | |
| 298 | |
| 299 /* Check if the CD-ROM subsystem has been initialized */ | |
| 300 if ( ! CheckInit(1, &cdrom) ) { | |
| 301 return(CD_ERROR); | |
| 302 } | |
| 303 | |
| 304 status = SDL_CDcaps.Status(cdrom, NULL); | |
| 305 switch (status) { | |
| 306 case CD_PLAYING: | |
| 307 case CD_PAUSED: | |
| 308 retval = SDL_CDcaps.Stop(cdrom); | |
| 309 default: | |
| 310 retval = 0; | |
| 311 break; | |
| 312 } | |
| 313 return(retval); | |
| 314 } | |
| 315 | |
| 316 int SDL_CDEject(SDL_CD *cdrom) | |
| 317 { | |
| 318 /* Check if the CD-ROM subsystem has been initialized */ | |
| 319 if ( ! CheckInit(1, &cdrom) ) { | |
| 320 return(CD_ERROR); | |
| 321 } | |
| 322 return(SDL_CDcaps.Eject(cdrom)); | |
| 323 } | |
| 324 | |
| 325 void SDL_CDClose(SDL_CD *cdrom) | |
| 326 { | |
| 327 /* Check if the CD-ROM subsystem has been initialized */ | |
| 328 if ( ! CheckInit(1, &cdrom) ) { | |
| 329 return; | |
| 330 } | |
| 331 SDL_CDcaps.Close(cdrom); | |
|
1336
3692456e7b0f
Use SDL_ prefixed versions of C library functions.
Sam Lantinga <slouken@libsdl.org>
parents:
1330
diff
changeset
|
332 SDL_free(cdrom); |
| 0 | 333 default_cdrom = NULL; |
| 334 } | |
| 335 | |
| 336 void SDL_CDROMQuit(void) | |
| 337 { | |
| 338 SDL_SYS_CDQuit(); | |
| 339 SDL_cdinitted = 0; | |
| 340 } |