Mercurial > sdl-ios-xcode
annotate src/cdrom/openbsd/SDL_syscdrom.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | 0f3aa6ab3341 |
| children | 3692456e7b0f |
| 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 <stdlib.h> | |
| 28 #include <sys/stat.h> | |
| 29 #include <fcntl.h> | |
| 30 #include <stdio.h> | |
| 31 #include <string.h> | |
| 32 #include <errno.h> | |
| 33 #include <unistd.h> | |
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34 #include <sys/ioctl.h> |
| 0 | 35 #include <sys/cdio.h> |
| 36 | |
| 37 #include "SDL_error.h" | |
| 38 #include "SDL_cdrom.h" | |
| 39 #include "SDL_syscdrom.h" | |
| 40 | |
| 41 | |
| 42 /* The maximum number of CD-ROM drives we'll detect */ | |
| 43 #define MAX_DRIVES 16 | |
| 44 | |
| 45 /* A list of available CD-ROM drives */ | |
| 46 static char *SDL_cdlist[MAX_DRIVES]; | |
| 47 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 48 | |
| 49 /* The system-dependent CD control functions */ | |
| 50 static const char *SDL_SYS_CDName(int drive); | |
| 51 static int SDL_SYS_CDOpen(int drive); | |
| 52 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 53 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 54 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 55 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 56 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 57 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 58 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 59 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 60 | |
| 61 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 62 #define ERRNO_TRAYEMPTY(errno) \ | |
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63 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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64 (errno == ENODEV)) |
| 0 | 65 |
| 66 /* Check a drive to see if it is a CD-ROM */ | |
| 67 static int CheckDrive(char *drive, struct stat *stbuf) | |
| 68 { | |
| 69 int is_cd, cdfd; | |
| 70 struct ioc_read_subchannel info; | |
| 71 | |
| 72 /* If it doesn't exist, return -1 */ | |
| 73 if ( stat(drive, stbuf) < 0 ) { | |
| 74 return(-1); | |
| 75 } | |
| 76 | |
| 77 /* If it does exist, verify that it's an available CD-ROM */ | |
| 78 is_cd = 0; | |
| 79 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 80 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 81 if ( cdfd >= 0 ) { | |
| 82 info.address_format = CD_MSF_FORMAT; | |
| 83 info.data_format = CD_CURRENT_POSITION; | |
| 84 info.data_len = 0; | |
| 85 info.data = NULL; | |
| 86 /* Under Linux, EIO occurs when a disk is not present. | |
| 87 This isn't 100% reliable, so we use the USE_MNTENT | |
| 88 code above instead. | |
| 89 */ | |
| 90 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
| 91 ERRNO_TRAYEMPTY(errno) ) { | |
| 92 is_cd = 1; | |
| 93 } | |
| 94 close(cdfd); | |
| 95 } | |
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96 else if (ERRNO_TRAYEMPTY(errno)) |
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97 is_cd = 1; |
| 0 | 98 } |
| 99 return(is_cd); | |
| 100 } | |
| 101 | |
| 102 /* Add a CD-ROM drive to our list of valid drives */ | |
| 103 static void AddDrive(char *drive, struct stat *stbuf) | |
| 104 { | |
| 105 int i; | |
| 106 | |
| 107 if ( SDL_numcds < MAX_DRIVES ) { | |
| 108 /* Check to make sure it's not already in our list. | |
| 109 This can happen when we see a drive via symbolic link. | |
| 110 */ | |
| 111 for ( i=0; i<SDL_numcds; ++i ) { | |
| 112 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 113 #ifdef DEBUG_CDROM | |
| 114 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 115 #endif | |
| 116 return; | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 /* Add this drive to our list */ | |
| 121 i = SDL_numcds; | |
| 122 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1); | |
| 123 if ( SDL_cdlist[i] == NULL ) { | |
| 124 SDL_OutOfMemory(); | |
| 125 return; | |
| 126 } | |
| 127 strcpy(SDL_cdlist[i], drive); | |
| 128 SDL_cdmode[i] = stbuf->st_rdev; | |
| 129 ++SDL_numcds; | |
| 130 #ifdef DEBUG_CDROM | |
| 131 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 132 #endif | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 int SDL_SYS_CDInit(void) | |
| 137 { | |
| 138 static char *checklist[] = { | |
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139 #ifdef __OpenBSD__ |
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140 "?0 cd?c", "cdrom", NULL |
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141 #elif defined(__NetBSD__) |
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142 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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143 #else |
| 0 | 144 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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145 #endif |
| 0 | 146 }; |
| 147 char *SDLcdrom; | |
| 148 int i, j, exists; | |
| 149 char drive[32]; | |
| 150 struct stat stbuf; | |
| 151 | |
| 152 /* Fill in our driver capabilities */ | |
| 153 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 154 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 155 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 156 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 157 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 158 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 159 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 160 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 161 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 162 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 163 | |
| 164 /* Look in the environment for our CD-ROM drive list */ | |
| 165 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */ | |
| 166 if ( SDLcdrom != NULL ) { | |
| 167 char *cdpath, *delim; | |
| 168 cdpath = malloc(strlen(SDLcdrom)+1); | |
| 169 if ( cdpath != NULL ) { | |
| 170 strcpy(cdpath, SDLcdrom); | |
| 171 SDLcdrom = cdpath; | |
| 172 do { | |
| 173 delim = strchr(SDLcdrom, ':'); | |
| 174 if ( delim ) { | |
| 175 *delim++ = '\0'; | |
| 176 } | |
| 177 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
| 178 AddDrive(SDLcdrom, &stbuf); | |
| 179 } | |
| 180 if ( delim ) { | |
| 181 SDLcdrom = delim; | |
| 182 } else { | |
| 183 SDLcdrom = NULL; | |
| 184 } | |
| 185 } while ( SDLcdrom ); | |
| 186 free(cdpath); | |
| 187 } | |
| 188 | |
| 189 /* If we found our drives, there's nothing left to do */ | |
| 190 if ( SDL_numcds > 0 ) { | |
| 191 return(0); | |
| 192 } | |
| 193 } | |
| 194 | |
| 195 /* Scan the system for CD-ROM drives */ | |
| 196 for ( i=0; checklist[i]; ++i ) { | |
| 197 if ( checklist[i][0] == '?' ) { | |
| 198 char *insert; | |
| 199 exists = 1; | |
| 200 for ( j=checklist[i][1]; exists; ++j ) { | |
| 201 sprintf(drive, "/dev/%s", &checklist[i][3]); | |
| 202 insert = strchr(drive, '?'); | |
| 203 if ( insert != NULL ) { | |
| 204 *insert = j; | |
| 205 } | |
| 206 switch (CheckDrive(drive, &stbuf)) { | |
| 207 /* Drive exists and is a CD-ROM */ | |
| 208 case 1: | |
| 209 AddDrive(drive, &stbuf); | |
| 210 break; | |
| 211 /* Drive exists, but isn't a CD-ROM */ | |
| 212 case 0: | |
| 213 break; | |
| 214 /* Drive doesn't exist */ | |
| 215 case -1: | |
| 216 exists = 0; | |
| 217 break; | |
| 218 } | |
| 219 } | |
| 220 } else { | |
| 221 sprintf(drive, "/dev/%s", checklist[i]); | |
| 222 if ( CheckDrive(drive, &stbuf) > 0 ) { | |
| 223 AddDrive(drive, &stbuf); | |
| 224 } | |
| 225 } | |
| 226 } | |
| 227 return(0); | |
| 228 } | |
| 229 | |
| 230 /* General ioctl() CD-ROM command function */ | |
| 231 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
| 232 { | |
| 233 int retval; | |
| 234 | |
| 235 retval = ioctl(id, command, arg); | |
| 236 if ( retval < 0 ) { | |
| 237 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
| 238 } | |
| 239 return(retval); | |
| 240 } | |
| 241 | |
| 242 static const char *SDL_SYS_CDName(int drive) | |
| 243 { | |
| 244 return(SDL_cdlist[drive]); | |
| 245 } | |
| 246 | |
| 247 static int SDL_SYS_CDOpen(int drive) | |
| 248 { | |
| 249 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
| 250 } | |
| 251 | |
| 252 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 253 { | |
| 254 struct ioc_toc_header toc; | |
| 255 int i, okay; | |
| 256 struct ioc_read_toc_entry entry; | |
| 257 struct cd_toc_entry data; | |
| 258 | |
| 259 okay = 0; | |
| 260 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
| 261 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
| 262 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 263 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 264 } | |
| 265 /* Read all the track TOC entries */ | |
| 266 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 267 if ( i == cdrom->numtracks ) { | |
| 268 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
| 269 } else { | |
| 270 cdrom->track[i].id = toc.starting_track+i; | |
| 271 } | |
| 272 entry.starting_track = cdrom->track[i].id; | |
| 273 entry.address_format = CD_MSF_FORMAT; | |
| 274 entry.data_len = sizeof(data); | |
| 275 entry.data = &data; | |
| 276 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
| 277 &entry) < 0 ) { | |
| 278 break; | |
| 279 } else { | |
| 280 cdrom->track[i].type = data.control; | |
| 281 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 282 data.addr.msf.minute, | |
| 283 data.addr.msf.second, | |
| 284 data.addr.msf.frame); | |
| 285 cdrom->track[i].length = 0; | |
| 286 if ( i > 0 ) { | |
| 287 cdrom->track[i-1].length = | |
| 288 cdrom->track[i].offset- | |
| 289 cdrom->track[i-1].offset; | |
| 290 } | |
| 291 } | |
| 292 } | |
| 293 if ( i == (cdrom->numtracks+1) ) { | |
| 294 okay = 1; | |
| 295 } | |
| 296 } | |
| 297 return(okay ? 0 : -1); | |
| 298 } | |
| 299 | |
| 300 /* Get CD-ROM status */ | |
| 301 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 302 { | |
| 303 CDstatus status; | |
| 304 struct ioc_toc_header toc; | |
| 305 struct ioc_read_subchannel info; | |
| 306 struct cd_sub_channel_info data; | |
| 307 | |
| 308 info.address_format = CD_MSF_FORMAT; | |
| 309 info.data_format = CD_CURRENT_POSITION; | |
| 310 info.track = 0; | |
| 311 info.data_len = sizeof(data); | |
| 312 info.data = &data; | |
| 313 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
| 314 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 315 status = CD_TRAYEMPTY; | |
| 316 } else { | |
| 317 status = CD_ERROR; | |
| 318 } | |
| 319 } else { | |
| 320 switch (data.header.audio_status) { | |
| 321 case CD_AS_AUDIO_INVALID: | |
| 322 case CD_AS_NO_STATUS: | |
| 323 /* Try to determine if there's a CD available */ | |
| 324 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
| 325 status = CD_STOPPED; | |
| 326 else | |
| 327 status = CD_TRAYEMPTY; | |
| 328 break; | |
| 329 case CD_AS_PLAY_COMPLETED: | |
| 330 status = CD_STOPPED; | |
| 331 break; | |
| 332 case CD_AS_PLAY_IN_PROGRESS: | |
| 333 status = CD_PLAYING; | |
| 334 break; | |
| 335 case CD_AS_PLAY_PAUSED: | |
| 336 status = CD_PAUSED; | |
| 337 break; | |
| 338 default: | |
| 339 status = CD_ERROR; | |
| 340 break; | |
| 341 } | |
| 342 } | |
| 343 if ( position ) { | |
| 344 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 345 *position = MSF_TO_FRAMES( | |
| 346 data.what.position.absaddr.msf.minute, | |
| 347 data.what.position.absaddr.msf.second, | |
| 348 data.what.position.absaddr.msf.frame); | |
| 349 } else { | |
| 350 *position = 0; | |
| 351 } | |
| 352 } | |
| 353 return(status); | |
| 354 } | |
| 355 | |
| 356 /* Start play */ | |
| 357 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 358 { | |
| 359 struct ioc_play_msf playtime; | |
| 360 | |
| 361 FRAMES_TO_MSF(start, | |
| 362 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
| 363 FRAMES_TO_MSF(start+length, | |
| 364 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
| 365 #ifdef DEBUG_CDROM | |
| 366 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 367 playtime.start_m, playtime.start_s, playtime.start_f, | |
| 368 playtime.end_m, playtime.end_s, playtime.end_f); | |
| 369 #endif | |
| 370 ioctl(cdrom->id, CDIOCSTART, 0); | |
| 371 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
| 372 } | |
| 373 | |
| 374 /* Pause play */ | |
| 375 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 376 { | |
| 377 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
| 378 } | |
| 379 | |
| 380 /* Resume play */ | |
| 381 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 382 { | |
| 383 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
| 384 } | |
| 385 | |
| 386 /* Stop play */ | |
| 387 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 388 { | |
| 389 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
| 390 } | |
| 391 | |
| 392 /* Eject the CD-ROM */ | |
| 393 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 394 { | |
| 395 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
| 396 } | |
| 397 | |
| 398 /* Close the CD-ROM handle */ | |
| 399 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 400 { | |
| 401 close(cdrom->id); | |
| 402 } | |
| 403 | |
| 404 void SDL_SYS_CDQuit(void) | |
| 405 { | |
| 406 int i; | |
| 407 | |
| 408 if ( SDL_numcds > 0 ) { | |
| 409 for ( i=0; i<SDL_numcds; ++i ) { | |
| 410 free(SDL_cdlist[i]); | |
| 411 } | |
| 412 SDL_numcds = 0; | |
| 413 } | |
| 414 } | |
| 415 |