| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 Sam Lantinga |
| 4 | |
| 5 | This library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 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 |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with this library; if not, write to the Free Software |
| 17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | Sam Lantinga |
| 20 | slouken@libsdl.org |
| 21 | */ |
| 22 | #include "SDL_config.h" |
| 23 | |
| 24 | #ifdef SDL_CDROM_FREEBSD |
| 25 | |
| 26 | /* Functions for system-level CD-ROM audio control */ |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/stat.h> |
| 30 | #include <fcntl.h> |
| 31 | #include <errno.h> |
| 32 | #include <unistd.h> |
| 33 | #include <sys/cdio.h> |
| 34 | |
| 35 | #include "SDL_cdrom.h" |
| 36 | #include "../SDL_syscdrom.h" |
| 37 | |
| 38 | |
| 39 | /* The maximum number of CD-ROM drives we'll detect */ |
| 40 | #define MAX_DRIVES 16 |
| 41 | |
| 42 | /* A list of available CD-ROM drives */ |
| 43 | static char *SDL_cdlist[MAX_DRIVES]; |
| 44 | static dev_t SDL_cdmode[MAX_DRIVES]; |
| 45 | |
| 46 | /* The system-dependent CD control functions */ |
| 47 | static const char *SDL_SYS_CDName(int drive); |
| 48 | static int SDL_SYS_CDOpen(int drive); |
| 49 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
| 50 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
| 51 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
| 52 | static int SDL_SYS_CDPause(SDL_CD *cdrom); |
| 53 | static int SDL_SYS_CDResume(SDL_CD *cdrom); |
| 54 | static int SDL_SYS_CDStop(SDL_CD *cdrom); |
| 55 | static int SDL_SYS_CDEject(SDL_CD *cdrom); |
| 56 | static void SDL_SYS_CDClose(SDL_CD *cdrom); |
| 57 | |
| 58 | /* Some ioctl() errno values which occur when the tray is empty */ |
| 59 | #define ERRNO_TRAYEMPTY(errno) \ |
| 60 | ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) |
| 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 | } |
| 92 | } |
| 93 | return(is_cd); |
| 94 | } |
| 95 | |
| 96 | /* Add a CD-ROM drive to our list of valid drives */ |
| 97 | static void AddDrive(char *drive, struct stat *stbuf) |
| 98 | { |
| 99 | int i; |
| 100 | |
| 101 | if ( SDL_numcds < MAX_DRIVES ) { |
| 102 | /* Check to make sure it's not already in our list. |
| 103 | This can happen when we see a drive via symbolic link. |
| 104 | */ |
| 105 | for ( i=0; i<SDL_numcds; ++i ) { |
| 106 | if ( stbuf->st_rdev == SDL_cdmode[i] ) { |
| 107 | #ifdef DEBUG_CDROM |
| 108 | fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); |
| 109 | #endif |
| 110 | return; |
| 111 | } |
| 112 | } |
| 113 | |
| 114 | /* Add this drive to our list */ |
| 115 | i = SDL_numcds; |
| 116 | SDL_cdlist[i] = SDL_strdup(drive); |
| 117 | if ( SDL_cdlist[i] == NULL ) { |
| 118 | SDL_OutOfMemory(); |
| 119 | return; |
| 120 | } |
| 121 | SDL_cdmode[i] = stbuf->st_rdev; |
| 122 | ++SDL_numcds; |
| 123 | #ifdef DEBUG_CDROM |
| 124 | fprintf(stderr, "Added CD-ROM drive: %s\n", drive); |
| 125 | #endif |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | int SDL_SYS_CDInit(void) |
| 130 | { |
| 131 | /* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c |
| 132 | /dev/matcd?c /dev/mcd?c /dev/scd?c */ |
| 133 | static char *checklist[] = { |
| 134 | "cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL |
| 135 | }; |
| 136 | char *SDLcdrom; |
| 137 | int i, j, exists; |
| 138 | char drive[32]; |
| 139 | struct stat stbuf; |
| 140 | |
| 141 | /* Fill in our driver capabilities */ |
| 142 | SDL_CDcaps.Name = SDL_SYS_CDName; |
| 143 | SDL_CDcaps.Open = SDL_SYS_CDOpen; |
| 144 | SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
| 145 | SDL_CDcaps.Status = SDL_SYS_CDStatus; |
| 146 | SDL_CDcaps.Play = SDL_SYS_CDPlay; |
| 147 | SDL_CDcaps.Pause = SDL_SYS_CDPause; |
| 148 | SDL_CDcaps.Resume = SDL_SYS_CDResume; |
| 149 | SDL_CDcaps.Stop = SDL_SYS_CDStop; |
| 150 | SDL_CDcaps.Eject = SDL_SYS_CDEject; |
| 151 | SDL_CDcaps.Close = SDL_SYS_CDClose; |
| 152 | |
| 153 | /* Look in the environment for our CD-ROM drive list */ |
| 154 | SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
| 155 | if ( SDLcdrom != NULL ) { |
| 156 | char *cdpath, *delim; |
| 157 | size_t len = SDL_strlen(SDLcdrom)+1; |
| 158 | cdpath = SDL_stack_alloc(char, len); |
| 159 | if ( cdpath != NULL ) { |
| 160 | SDL_strlcpy(cdpath, SDLcdrom, len); |
| 161 | SDLcdrom = cdpath; |
| 162 | do { |
| 163 | delim = SDL_strchr(SDLcdrom, ':'); |
| 164 | if ( delim ) { |
| 165 | *delim++ = '\0'; |
| 166 | } |
| 167 | if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { |
| 168 | AddDrive(SDLcdrom, &stbuf); |
| 169 | } |
| 170 | if ( delim ) { |
| 171 | SDLcdrom = delim; |
| 172 | } else { |
| 173 | SDLcdrom = NULL; |
| 174 | } |
| 175 | } while ( SDLcdrom ); |
| 176 | SDL_stack_free(cdpath); |
| 177 | } |
| 178 | |
| 179 | /* If we found our drives, there's nothing left to do */ |
| 180 | if ( SDL_numcds > 0 ) { |
| 181 | return(0); |
| 182 | } |
| 183 | } |
| 184 | |
| 185 | /* Scan the system for CD-ROM drives */ |
| 186 | for ( i=0; checklist[i]; ++i ) { |
| 187 | if ( checklist[i][0] == '?' ) { |
| 188 | char *insert; |
| 189 | exists = 1; |
| 190 | for ( j=checklist[i][1]; exists; ++j ) { |
| 191 | SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]); |
| 192 | insert = SDL_strchr(drive, '?'); |
| 193 | if ( insert != NULL ) { |
| 194 | *insert = j; |
| 195 | } |
| 196 | switch (CheckDrive(drive, &stbuf)) { |
| 197 | /* Drive exists and is a CD-ROM */ |
| 198 | case 1: |
| 199 | AddDrive(drive, &stbuf); |
| 200 | break; |
| 201 | /* Drive exists, but isn't a CD-ROM */ |
| 202 | case 0: |
| 203 | break; |
| 204 | /* Drive doesn't exist */ |
| 205 | case -1: |
| 206 | exists = 0; |
| 207 | break; |
| 208 | } |
| 209 | } |
| 210 | } else { |
| 211 | SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
| 212 | if ( CheckDrive(drive, &stbuf) > 0 ) { |
| 213 | AddDrive(drive, &stbuf); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | return(0); |
| 218 | } |
| 219 | |
| 220 | /* General ioctl() CD-ROM command function */ |
| 221 | static int SDL_SYS_CDioctl(int id, int command, void *arg) |
| 222 | { |
| 223 | int retval; |
| 224 | |
| 225 | retval = ioctl(id, command, arg); |
| 226 | if ( retval < 0 ) { |
| 227 | SDL_SetError("ioctl() error: %s", strerror(errno)); |
| 228 | } |
| 229 | return(retval); |
| 230 | } |
| 231 | |
| 232 | static const char *SDL_SYS_CDName(int drive) |
| 233 | { |
| 234 | return(SDL_cdlist[drive]); |
| 235 | } |
| 236 | |
| 237 | static int SDL_SYS_CDOpen(int drive) |
| 238 | { |
| 239 | return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); |
| 240 | } |
| 241 | |
| 242 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
| 243 | { |
| 244 | struct ioc_toc_header toc; |
| 245 | int i, okay; |
| 246 | struct ioc_read_toc_entry entry; |
| 247 | struct cd_toc_entry data; |
| 248 | |
| 249 | okay = 0; |
| 250 | if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { |
| 251 | cdrom->numtracks = toc.ending_track-toc.starting_track+1; |
| 252 | if ( cdrom->numtracks > SDL_MAX_TRACKS ) { |
| 253 | cdrom->numtracks = SDL_MAX_TRACKS; |
| 254 | } |
| 255 | /* Read all the track TOC entries */ |
| 256 | for ( i=0; i<=cdrom->numtracks; ++i ) { |
| 257 | if ( i == cdrom->numtracks ) { |
| 258 | cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ |
| 259 | } else { |
| 260 | cdrom->track[i].id = toc.starting_track+i; |
| 261 | } |
| 262 | entry.starting_track = cdrom->track[i].id; |
| 263 | entry.address_format = CD_MSF_FORMAT; |
| 264 | entry.data_len = sizeof(data); |
| 265 | entry.data = &data; |
| 266 | if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, |
| 267 | &entry) < 0 ) { |
| 268 | break; |
| 269 | } else { |
| 270 | cdrom->track[i].type = data.control; |
| 271 | cdrom->track[i].offset = MSF_TO_FRAMES( |
| 272 | data.addr.msf.minute, |
| 273 | data.addr.msf.second, |
| 274 | data.addr.msf.frame); |
| 275 | cdrom->track[i].length = 0; |
| 276 | if ( i > 0 ) { |
| 277 | cdrom->track[i-1].length = |
| 278 | cdrom->track[i].offset- |
| 279 | cdrom->track[i-1].offset; |
| 280 | } |
| 281 | } |
| 282 | } |
| 283 | if ( i == (cdrom->numtracks+1) ) { |
| 284 | okay = 1; |
| 285 | } |
| 286 | } |
| 287 | return(okay ? 0 : -1); |
| 288 | } |
| 289 | |
| 290 | /* Get CD-ROM status */ |
| 291 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
| 292 | { |
| 293 | CDstatus status; |
| 294 | struct ioc_toc_header toc; |
| 295 | struct ioc_read_subchannel info; |
| 296 | struct cd_sub_channel_info data; |
| 297 | |
| 298 | info.address_format = CD_MSF_FORMAT; |
| 299 | info.data_format = CD_CURRENT_POSITION; |
| 300 | info.track = 0; |
| 301 | info.data_len = sizeof(data); |
| 302 | info.data = &data; |
| 303 | if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { |
| 304 | if ( ERRNO_TRAYEMPTY(errno) ) { |
| 305 | status = CD_TRAYEMPTY; |
| 306 | } else { |
| 307 | status = CD_ERROR; |
| 308 | } |
| 309 | } else { |
| 310 | switch (data.header.audio_status) { |
| 311 | case CD_AS_AUDIO_INVALID: |
| 312 | case CD_AS_NO_STATUS: |
| 313 | /* Try to determine if there's a CD available */ |
| 314 | if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) |
| 315 | status = CD_STOPPED; |
| 316 | else |
| 317 | status = CD_TRAYEMPTY; |
| 318 | break; |
| 319 | case CD_AS_PLAY_COMPLETED: |
| 320 | status = CD_STOPPED; |
| 321 | break; |
| 322 | case CD_AS_PLAY_IN_PROGRESS: |
| 323 | status = CD_PLAYING; |
| 324 | break; |
| 325 | case CD_AS_PLAY_PAUSED: |
| 326 | status = CD_PAUSED; |
| 327 | break; |
| 328 | default: |
| 329 | status = CD_ERROR; |
| 330 | break; |
| 331 | } |
| 332 | } |
| 333 | if ( position ) { |
| 334 | if ( status == CD_PLAYING || (status == CD_PAUSED) ) { |
| 335 | *position = MSF_TO_FRAMES( |
| 336 | data.what.position.absaddr.msf.minute, |
| 337 | data.what.position.absaddr.msf.second, |
| 338 | data.what.position.absaddr.msf.frame); |
| 339 | } else { |
| 340 | *position = 0; |
| 341 | } |
| 342 | } |
| 343 | return(status); |
| 344 | } |
| 345 | |
| 346 | /* Start play */ |
| 347 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
| 348 | { |
| 349 | struct ioc_play_msf playtime; |
| 350 | |
| 351 | FRAMES_TO_MSF(start, |
| 352 | &playtime.start_m, &playtime.start_s, &playtime.start_f); |
| 353 | FRAMES_TO_MSF(start+length, |
| 354 | &playtime.end_m, &playtime.end_s, &playtime.end_f); |
| 355 | #ifdef DEBUG_CDROM |
| 356 | fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", |
| 357 | playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, |
| 358 | playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); |
| 359 | #endif |
| 360 | ioctl(cdrom->id, CDIOCSTART, 0); |
| 361 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); |
| 362 | } |
| 363 | |
| 364 | /* Pause play */ |
| 365 | static int SDL_SYS_CDPause(SDL_CD *cdrom) |
| 366 | { |
| 367 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); |
| 368 | } |
| 369 | |
| 370 | /* Resume play */ |
| 371 | static int SDL_SYS_CDResume(SDL_CD *cdrom) |
| 372 | { |
| 373 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); |
| 374 | } |
| 375 | |
| 376 | /* Stop play */ |
| 377 | static int SDL_SYS_CDStop(SDL_CD *cdrom) |
| 378 | { |
| 379 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); |
| 380 | } |
| 381 | |
| 382 | /* Eject the CD-ROM */ |
| 383 | static int SDL_SYS_CDEject(SDL_CD *cdrom) |
| 384 | { |
| 385 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); |
| 386 | } |
| 387 | |
| 388 | /* Close the CD-ROM handle */ |
| 389 | static void SDL_SYS_CDClose(SDL_CD *cdrom) |
| 390 | { |
| 391 | close(cdrom->id); |
| 392 | } |
| 393 | |
| 394 | void SDL_SYS_CDQuit(void) |
| 395 | { |
| 396 | int i; |
| 397 | |
| 398 | if ( SDL_numcds > 0 ) { |
| 399 | for ( i=0; i<SDL_numcds; ++i ) { |
| 400 | SDL_free(SDL_cdlist[i]); |
| 401 | } |
| 402 | SDL_numcds = 0; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | #endif /* SDL_CDROM_FREEBSD */ |