Mercurial > sdl-ios-xcode
annotate src/cdrom/openbsd/SDL_syscdrom.c @ 1358:c71e05b4dc2e
More header massaging... works great on Windows. ;-)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Fri, 10 Feb 2006 06:48:43 +0000 |
| parents | 604d73db6802 |
| children | 19418e4422cb |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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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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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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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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13 Lesser General Public License for more details. |
| 0 | 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 |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* Functions for system-level CD-ROM audio control */ | |
| 24 | |
| 25 #include <sys/types.h> | |
| 26 #include <sys/ioctl.h> | |
| 27 #include <sys/stat.h> | |
| 28 #include <fcntl.h> | |
| 29 #include <errno.h> | |
| 30 #include <unistd.h> | |
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31 #include <sys/ioctl.h> |
| 0 | 32 #include <sys/cdio.h> |
| 33 | |
| 34 #include "SDL_cdrom.h" | |
| 35 #include "SDL_syscdrom.h" | |
| 36 | |
| 37 | |
| 38 /* The maximum number of CD-ROM drives we'll detect */ | |
| 39 #define MAX_DRIVES 16 | |
| 40 | |
| 41 /* A list of available CD-ROM drives */ | |
| 42 static char *SDL_cdlist[MAX_DRIVES]; | |
| 43 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 44 | |
| 45 /* The system-dependent CD control functions */ | |
| 46 static const char *SDL_SYS_CDName(int drive); | |
| 47 static int SDL_SYS_CDOpen(int drive); | |
| 48 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 49 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 50 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 51 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 52 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 53 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 54 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 55 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 56 | |
| 57 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 58 #define ERRNO_TRAYEMPTY(errno) \ | |
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59 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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60 (errno == ENODEV)) |
| 0 | 61 |
| 62 /* Check a drive to see if it is a CD-ROM */ | |
| 63 static int CheckDrive(char *drive, struct stat *stbuf) | |
| 64 { | |
| 65 int is_cd, cdfd; | |
| 66 struct ioc_read_subchannel info; | |
| 67 | |
| 68 /* If it doesn't exist, return -1 */ | |
| 69 if ( stat(drive, stbuf) < 0 ) { | |
| 70 return(-1); | |
| 71 } | |
| 72 | |
| 73 /* If it does exist, verify that it's an available CD-ROM */ | |
| 74 is_cd = 0; | |
| 75 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 76 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 77 if ( cdfd >= 0 ) { | |
| 78 info.address_format = CD_MSF_FORMAT; | |
| 79 info.data_format = CD_CURRENT_POSITION; | |
| 80 info.data_len = 0; | |
| 81 info.data = NULL; | |
| 82 /* Under Linux, EIO occurs when a disk is not present. | |
| 83 This isn't 100% reliable, so we use the USE_MNTENT | |
| 84 code above instead. | |
| 85 */ | |
| 86 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
| 87 ERRNO_TRAYEMPTY(errno) ) { | |
| 88 is_cd = 1; | |
| 89 } | |
| 90 close(cdfd); | |
| 91 } | |
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92 else if (ERRNO_TRAYEMPTY(errno)) |
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93 is_cd = 1; |
| 0 | 94 } |
| 95 return(is_cd); | |
| 96 } | |
| 97 | |
| 98 /* Add a CD-ROM drive to our list of valid drives */ | |
| 99 static void AddDrive(char *drive, struct stat *stbuf) | |
| 100 { | |
| 101 int i; | |
| 102 | |
| 103 if ( SDL_numcds < MAX_DRIVES ) { | |
| 104 /* Check to make sure it's not already in our list. | |
| 105 This can happen when we see a drive via symbolic link. | |
| 106 */ | |
| 107 for ( i=0; i<SDL_numcds; ++i ) { | |
| 108 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 109 #ifdef DEBUG_CDROM | |
| 110 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 111 #endif | |
| 112 return; | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 /* Add this drive to our list */ | |
| 117 i = SDL_numcds; | |
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118 SDL_cdlist[i] = (char *)SDL_malloc(SDL_strlen(drive)+1); |
| 0 | 119 if ( SDL_cdlist[i] == NULL ) { |
| 120 SDL_OutOfMemory(); | |
| 121 return; | |
| 122 } | |
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123 SDL_strcpy(SDL_cdlist[i], drive); |
| 0 | 124 SDL_cdmode[i] = stbuf->st_rdev; |
| 125 ++SDL_numcds; | |
| 126 #ifdef DEBUG_CDROM | |
| 127 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 128 #endif | |
| 129 } | |
| 130 } | |
| 131 | |
| 132 int SDL_SYS_CDInit(void) | |
| 133 { | |
| 134 static char *checklist[] = { | |
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135 #ifdef __OpenBSD__ |
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136 "?0 cd?c", "cdrom", NULL |
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137 #elif defined(__NetBSD__) |
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138 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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139 #else |
| 0 | 140 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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141 #endif |
| 0 | 142 }; |
| 143 char *SDLcdrom; | |
| 144 int i, j, exists; | |
| 145 char drive[32]; | |
| 146 struct stat stbuf; | |
| 147 | |
| 148 /* Fill in our driver capabilities */ | |
| 149 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 150 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 151 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 152 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 153 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 154 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 155 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 156 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 157 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 158 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 159 | |
| 160 /* Look in the environment for our CD-ROM drive list */ | |
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161 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
| 0 | 162 if ( SDLcdrom != NULL ) { |
| 163 char *cdpath, *delim; | |
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164 cdpath = SDL_malloc(SDL_strlen(SDLcdrom)+1); |
| 0 | 165 if ( cdpath != NULL ) { |
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166 SDL_strcpy(cdpath, SDLcdrom); |
| 0 | 167 SDLcdrom = cdpath; |
| 168 do { | |
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169 delim = SDL_strchr(SDLcdrom, ':'); |
| 0 | 170 if ( delim ) { |
| 171 *delim++ = '\0'; | |
| 172 } | |
| 173 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
| 174 AddDrive(SDLcdrom, &stbuf); | |
| 175 } | |
| 176 if ( delim ) { | |
| 177 SDLcdrom = delim; | |
| 178 } else { | |
| 179 SDLcdrom = NULL; | |
| 180 } | |
| 181 } while ( SDLcdrom ); | |
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182 SDL_free(cdpath); |
| 0 | 183 } |
| 184 | |
| 185 /* If we found our drives, there's nothing left to do */ | |
| 186 if ( SDL_numcds > 0 ) { | |
| 187 return(0); | |
| 188 } | |
| 189 } | |
| 190 | |
| 191 /* Scan the system for CD-ROM drives */ | |
| 192 for ( i=0; checklist[i]; ++i ) { | |
| 193 if ( checklist[i][0] == '?' ) { | |
| 194 char *insert; | |
| 195 exists = 1; | |
| 196 for ( j=checklist[i][1]; exists; ++j ) { | |
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197 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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198 insert = SDL_strchr(drive, '?'); |
| 0 | 199 if ( insert != NULL ) { |
| 200 *insert = j; | |
| 201 } | |
| 202 switch (CheckDrive(drive, &stbuf)) { | |
| 203 /* Drive exists and is a CD-ROM */ | |
| 204 case 1: | |
| 205 AddDrive(drive, &stbuf); | |
| 206 break; | |
| 207 /* Drive exists, but isn't a CD-ROM */ | |
| 208 case 0: | |
| 209 break; | |
| 210 /* Drive doesn't exist */ | |
| 211 case -1: | |
| 212 exists = 0; | |
| 213 break; | |
| 214 } | |
| 215 } | |
| 216 } else { | |
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217 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
| 0 | 218 if ( CheckDrive(drive, &stbuf) > 0 ) { |
| 219 AddDrive(drive, &stbuf); | |
| 220 } | |
| 221 } | |
| 222 } | |
| 223 return(0); | |
| 224 } | |
| 225 | |
| 226 /* General ioctl() CD-ROM command function */ | |
| 227 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
| 228 { | |
| 229 int retval; | |
| 230 | |
| 231 retval = ioctl(id, command, arg); | |
| 232 if ( retval < 0 ) { | |
| 233 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
| 234 } | |
| 235 return(retval); | |
| 236 } | |
| 237 | |
| 238 static const char *SDL_SYS_CDName(int drive) | |
| 239 { | |
| 240 return(SDL_cdlist[drive]); | |
| 241 } | |
| 242 | |
| 243 static int SDL_SYS_CDOpen(int drive) | |
| 244 { | |
| 245 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
| 246 } | |
| 247 | |
| 248 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 249 { | |
| 250 struct ioc_toc_header toc; | |
| 251 int i, okay; | |
| 252 struct ioc_read_toc_entry entry; | |
| 253 struct cd_toc_entry data; | |
| 254 | |
| 255 okay = 0; | |
| 256 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
| 257 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
| 258 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 259 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 260 } | |
| 261 /* Read all the track TOC entries */ | |
| 262 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 263 if ( i == cdrom->numtracks ) { | |
| 264 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
| 265 } else { | |
| 266 cdrom->track[i].id = toc.starting_track+i; | |
| 267 } | |
| 268 entry.starting_track = cdrom->track[i].id; | |
| 269 entry.address_format = CD_MSF_FORMAT; | |
| 270 entry.data_len = sizeof(data); | |
| 271 entry.data = &data; | |
| 272 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
| 273 &entry) < 0 ) { | |
| 274 break; | |
| 275 } else { | |
| 276 cdrom->track[i].type = data.control; | |
| 277 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 278 data.addr.msf.minute, | |
| 279 data.addr.msf.second, | |
| 280 data.addr.msf.frame); | |
| 281 cdrom->track[i].length = 0; | |
| 282 if ( i > 0 ) { | |
| 283 cdrom->track[i-1].length = | |
| 284 cdrom->track[i].offset- | |
| 285 cdrom->track[i-1].offset; | |
| 286 } | |
| 287 } | |
| 288 } | |
| 289 if ( i == (cdrom->numtracks+1) ) { | |
| 290 okay = 1; | |
| 291 } | |
| 292 } | |
| 293 return(okay ? 0 : -1); | |
| 294 } | |
| 295 | |
| 296 /* Get CD-ROM status */ | |
| 297 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 298 { | |
| 299 CDstatus status; | |
| 300 struct ioc_toc_header toc; | |
| 301 struct ioc_read_subchannel info; | |
| 302 struct cd_sub_channel_info data; | |
| 303 | |
| 304 info.address_format = CD_MSF_FORMAT; | |
| 305 info.data_format = CD_CURRENT_POSITION; | |
| 306 info.track = 0; | |
| 307 info.data_len = sizeof(data); | |
| 308 info.data = &data; | |
| 309 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
| 310 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 311 status = CD_TRAYEMPTY; | |
| 312 } else { | |
| 313 status = CD_ERROR; | |
| 314 } | |
| 315 } else { | |
| 316 switch (data.header.audio_status) { | |
| 317 case CD_AS_AUDIO_INVALID: | |
| 318 case CD_AS_NO_STATUS: | |
| 319 /* Try to determine if there's a CD available */ | |
| 320 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
| 321 status = CD_STOPPED; | |
| 322 else | |
| 323 status = CD_TRAYEMPTY; | |
| 324 break; | |
| 325 case CD_AS_PLAY_COMPLETED: | |
| 326 status = CD_STOPPED; | |
| 327 break; | |
| 328 case CD_AS_PLAY_IN_PROGRESS: | |
| 329 status = CD_PLAYING; | |
| 330 break; | |
| 331 case CD_AS_PLAY_PAUSED: | |
| 332 status = CD_PAUSED; | |
| 333 break; | |
| 334 default: | |
| 335 status = CD_ERROR; | |
| 336 break; | |
| 337 } | |
| 338 } | |
| 339 if ( position ) { | |
| 340 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 341 *position = MSF_TO_FRAMES( | |
| 342 data.what.position.absaddr.msf.minute, | |
| 343 data.what.position.absaddr.msf.second, | |
| 344 data.what.position.absaddr.msf.frame); | |
| 345 } else { | |
| 346 *position = 0; | |
| 347 } | |
| 348 } | |
| 349 return(status); | |
| 350 } | |
| 351 | |
| 352 /* Start play */ | |
| 353 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 354 { | |
| 355 struct ioc_play_msf playtime; | |
| 356 | |
| 357 FRAMES_TO_MSF(start, | |
| 358 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
| 359 FRAMES_TO_MSF(start+length, | |
| 360 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
| 361 #ifdef DEBUG_CDROM | |
| 362 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 363 playtime.start_m, playtime.start_s, playtime.start_f, | |
| 364 playtime.end_m, playtime.end_s, playtime.end_f); | |
| 365 #endif | |
| 366 ioctl(cdrom->id, CDIOCSTART, 0); | |
| 367 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
| 368 } | |
| 369 | |
| 370 /* Pause play */ | |
| 371 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 372 { | |
| 373 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
| 374 } | |
| 375 | |
| 376 /* Resume play */ | |
| 377 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 378 { | |
| 379 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
| 380 } | |
| 381 | |
| 382 /* Stop play */ | |
| 383 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 384 { | |
| 385 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
| 386 } | |
| 387 | |
| 388 /* Eject the CD-ROM */ | |
| 389 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 390 { | |
| 391 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
| 392 } | |
| 393 | |
| 394 /* Close the CD-ROM handle */ | |
| 395 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 396 { | |
| 397 close(cdrom->id); | |
| 398 } | |
| 399 | |
| 400 void SDL_SYS_CDQuit(void) | |
| 401 { | |
| 402 int i; | |
| 403 | |
| 404 if ( SDL_numcds > 0 ) { | |
| 405 for ( i=0; i<SDL_numcds; ++i ) { | |
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406 SDL_free(SDL_cdlist[i]); |
| 0 | 407 } |
| 408 SDL_numcds = 0; | |
| 409 } | |
| 410 } | |
| 411 |