Mercurial > sdl-ios-xcode
annotate src/cdrom/freebsd/SDL_syscdrom.c @ 1399:c35c161a1100
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| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 20 Feb 2006 23:18:49 +0000 |
| parents | c0a74f199ecf |
| children | d910939febfa |
| 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/stat.h> | |
| 27 #include <fcntl.h> | |
| 28 #include <errno.h> | |
| 29 #include <unistd.h> | |
| 30 #include <sys/cdio.h> | |
| 31 | |
| 32 #include "SDL_cdrom.h" | |
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33 #include "../SDL_syscdrom.h" |
| 0 | 34 |
| 35 | |
| 36 /* The maximum number of CD-ROM drives we'll detect */ | |
| 37 #define MAX_DRIVES 16 | |
| 38 | |
| 39 /* A list of available CD-ROM drives */ | |
| 40 static char *SDL_cdlist[MAX_DRIVES]; | |
| 41 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 42 | |
| 43 /* The system-dependent CD control functions */ | |
| 44 static const char *SDL_SYS_CDName(int drive); | |
| 45 static int SDL_SYS_CDOpen(int drive); | |
| 46 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 47 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 48 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 49 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 50 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 51 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 52 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 53 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 54 | |
| 55 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 56 #define ERRNO_TRAYEMPTY(errno) \ | |
| 57 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) | |
| 58 | |
| 59 /* Check a drive to see if it is a CD-ROM */ | |
| 60 static int CheckDrive(char *drive, struct stat *stbuf) | |
| 61 { | |
| 62 int is_cd, cdfd; | |
| 63 struct ioc_read_subchannel info; | |
| 64 | |
| 65 /* If it doesn't exist, return -1 */ | |
| 66 if ( stat(drive, stbuf) < 0 ) { | |
| 67 return(-1); | |
| 68 } | |
| 69 | |
| 70 /* If it does exist, verify that it's an available CD-ROM */ | |
| 71 is_cd = 0; | |
| 72 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 73 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 74 if ( cdfd >= 0 ) { | |
| 75 info.address_format = CD_MSF_FORMAT; | |
| 76 info.data_format = CD_CURRENT_POSITION; | |
| 77 info.data_len = 0; | |
| 78 info.data = NULL; | |
| 79 /* Under Linux, EIO occurs when a disk is not present. | |
| 80 This isn't 100% reliable, so we use the USE_MNTENT | |
| 81 code above instead. | |
| 82 */ | |
| 83 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
| 84 ERRNO_TRAYEMPTY(errno) ) { | |
| 85 is_cd = 1; | |
| 86 } | |
| 87 close(cdfd); | |
| 88 } | |
| 89 } | |
| 90 return(is_cd); | |
| 91 } | |
| 92 | |
| 93 /* Add a CD-ROM drive to our list of valid drives */ | |
| 94 static void AddDrive(char *drive, struct stat *stbuf) | |
| 95 { | |
| 96 int i; | |
| 97 | |
| 98 if ( SDL_numcds < MAX_DRIVES ) { | |
| 99 /* Check to make sure it's not already in our list. | |
| 100 This can happen when we see a drive via symbolic link. | |
| 101 */ | |
| 102 for ( i=0; i<SDL_numcds; ++i ) { | |
| 103 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 104 #ifdef DEBUG_CDROM | |
| 105 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 106 #endif | |
| 107 return; | |
| 108 } | |
| 109 } | |
| 110 | |
| 111 /* Add this drive to our list */ | |
| 112 i = SDL_numcds; | |
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113 SDL_cdlist[i] = SDL_strdup(drive); |
| 0 | 114 if ( SDL_cdlist[i] == NULL ) { |
| 115 SDL_OutOfMemory(); | |
| 116 return; | |
| 117 } | |
| 118 SDL_cdmode[i] = stbuf->st_rdev; | |
| 119 ++SDL_numcds; | |
| 120 #ifdef DEBUG_CDROM | |
| 121 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 122 #endif | |
| 123 } | |
| 124 } | |
| 125 | |
| 126 int SDL_SYS_CDInit(void) | |
| 127 { | |
| 128 /* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c | |
| 129 /dev/matcd?c /dev/mcd?c /dev/scd?c */ | |
| 130 static char *checklist[] = { | |
| 131 "cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL | |
| 132 }; | |
| 133 char *SDLcdrom; | |
| 134 int i, j, exists; | |
| 135 char drive[32]; | |
| 136 struct stat stbuf; | |
| 137 | |
| 138 /* Fill in our driver capabilities */ | |
| 139 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 140 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 141 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 142 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 143 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 144 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 145 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 146 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 147 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 148 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 149 | |
| 150 /* Look in the environment for our CD-ROM drive list */ | |
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151 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
| 0 | 152 if ( SDLcdrom != NULL ) { |
| 153 char *cdpath, *delim; | |
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154 size_t len = SDL_strlen(SDLcdrom)+1; |
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155 cdpath = SDL_stack_alloc(char, len); |
| 0 | 156 if ( cdpath != NULL ) { |
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157 SDL_strlcpy(cdpath, SDLcdrom, len); |
| 0 | 158 SDLcdrom = cdpath; |
| 159 do { | |
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160 delim = SDL_strchr(SDLcdrom, ':'); |
| 0 | 161 if ( delim ) { |
| 162 *delim++ = '\0'; | |
| 163 } | |
| 164 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
| 165 AddDrive(SDLcdrom, &stbuf); | |
| 166 } | |
| 167 if ( delim ) { | |
| 168 SDLcdrom = delim; | |
| 169 } else { | |
| 170 SDLcdrom = NULL; | |
| 171 } | |
| 172 } while ( SDLcdrom ); | |
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173 SDL_stack_free(cdpath); |
| 0 | 174 } |
| 175 | |
| 176 /* If we found our drives, there's nothing left to do */ | |
| 177 if ( SDL_numcds > 0 ) { | |
| 178 return(0); | |
| 179 } | |
| 180 } | |
| 181 | |
| 182 /* Scan the system for CD-ROM drives */ | |
| 183 for ( i=0; checklist[i]; ++i ) { | |
| 184 if ( checklist[i][0] == '?' ) { | |
| 185 char *insert; | |
| 186 exists = 1; | |
| 187 for ( j=checklist[i][1]; exists; ++j ) { | |
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188 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]); |
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189 insert = SDL_strchr(drive, '?'); |
| 0 | 190 if ( insert != NULL ) { |
| 191 *insert = j; | |
| 192 } | |
| 193 switch (CheckDrive(drive, &stbuf)) { | |
| 194 /* Drive exists and is a CD-ROM */ | |
| 195 case 1: | |
| 196 AddDrive(drive, &stbuf); | |
| 197 break; | |
| 198 /* Drive exists, but isn't a CD-ROM */ | |
| 199 case 0: | |
| 200 break; | |
| 201 /* Drive doesn't exist */ | |
| 202 case -1: | |
| 203 exists = 0; | |
| 204 break; | |
| 205 } | |
| 206 } | |
| 207 } else { | |
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208 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
| 0 | 209 if ( CheckDrive(drive, &stbuf) > 0 ) { |
| 210 AddDrive(drive, &stbuf); | |
| 211 } | |
| 212 } | |
| 213 } | |
| 214 return(0); | |
| 215 } | |
| 216 | |
| 217 /* General ioctl() CD-ROM command function */ | |
| 218 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
| 219 { | |
| 220 int retval; | |
| 221 | |
| 222 retval = ioctl(id, command, arg); | |
| 223 if ( retval < 0 ) { | |
| 224 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
| 225 } | |
| 226 return(retval); | |
| 227 } | |
| 228 | |
| 229 static const char *SDL_SYS_CDName(int drive) | |
| 230 { | |
| 231 return(SDL_cdlist[drive]); | |
| 232 } | |
| 233 | |
| 234 static int SDL_SYS_CDOpen(int drive) | |
| 235 { | |
| 236 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
| 237 } | |
| 238 | |
| 239 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 240 { | |
| 241 struct ioc_toc_header toc; | |
| 242 int i, okay; | |
| 243 struct ioc_read_toc_entry entry; | |
| 244 struct cd_toc_entry data; | |
| 245 | |
| 246 okay = 0; | |
| 247 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
| 248 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
| 249 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 250 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 251 } | |
| 252 /* Read all the track TOC entries */ | |
| 253 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 254 if ( i == cdrom->numtracks ) { | |
| 255 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
| 256 } else { | |
| 257 cdrom->track[i].id = toc.starting_track+i; | |
| 258 } | |
| 259 entry.starting_track = cdrom->track[i].id; | |
| 260 entry.address_format = CD_MSF_FORMAT; | |
| 261 entry.data_len = sizeof(data); | |
| 262 entry.data = &data; | |
| 263 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
| 264 &entry) < 0 ) { | |
| 265 break; | |
| 266 } else { | |
| 267 cdrom->track[i].type = data.control; | |
| 268 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 269 data.addr.msf.minute, | |
| 270 data.addr.msf.second, | |
| 271 data.addr.msf.frame); | |
| 272 cdrom->track[i].length = 0; | |
| 273 if ( i > 0 ) { | |
| 274 cdrom->track[i-1].length = | |
| 275 cdrom->track[i].offset- | |
| 276 cdrom->track[i-1].offset; | |
| 277 } | |
| 278 } | |
| 279 } | |
| 280 if ( i == (cdrom->numtracks+1) ) { | |
| 281 okay = 1; | |
| 282 } | |
| 283 } | |
| 284 return(okay ? 0 : -1); | |
| 285 } | |
| 286 | |
| 287 /* Get CD-ROM status */ | |
| 288 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 289 { | |
| 290 CDstatus status; | |
| 291 struct ioc_toc_header toc; | |
| 292 struct ioc_read_subchannel info; | |
| 293 struct cd_sub_channel_info data; | |
| 294 | |
| 295 info.address_format = CD_MSF_FORMAT; | |
| 296 info.data_format = CD_CURRENT_POSITION; | |
| 297 info.track = 0; | |
| 298 info.data_len = sizeof(data); | |
| 299 info.data = &data; | |
| 300 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
| 301 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 302 status = CD_TRAYEMPTY; | |
| 303 } else { | |
| 304 status = CD_ERROR; | |
| 305 } | |
| 306 } else { | |
| 307 switch (data.header.audio_status) { | |
| 308 case CD_AS_AUDIO_INVALID: | |
| 309 case CD_AS_NO_STATUS: | |
| 310 /* Try to determine if there's a CD available */ | |
| 311 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
| 312 status = CD_STOPPED; | |
| 313 else | |
| 314 status = CD_TRAYEMPTY; | |
| 315 break; | |
| 316 case CD_AS_PLAY_COMPLETED: | |
| 317 status = CD_STOPPED; | |
| 318 break; | |
| 319 case CD_AS_PLAY_IN_PROGRESS: | |
| 320 status = CD_PLAYING; | |
| 321 break; | |
| 322 case CD_AS_PLAY_PAUSED: | |
| 323 status = CD_PAUSED; | |
| 324 break; | |
| 325 default: | |
| 326 status = CD_ERROR; | |
| 327 break; | |
| 328 } | |
| 329 } | |
| 330 if ( position ) { | |
| 331 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
| 332 *position = MSF_TO_FRAMES( | |
| 333 data.what.position.absaddr.msf.minute, | |
| 334 data.what.position.absaddr.msf.second, | |
| 335 data.what.position.absaddr.msf.frame); | |
| 336 } else { | |
| 337 *position = 0; | |
| 338 } | |
| 339 } | |
| 340 return(status); | |
| 341 } | |
| 342 | |
| 343 /* Start play */ | |
| 344 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
| 345 { | |
| 346 struct ioc_play_msf playtime; | |
| 347 | |
| 348 FRAMES_TO_MSF(start, | |
| 349 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
| 350 FRAMES_TO_MSF(start+length, | |
| 351 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
| 352 #ifdef DEBUG_CDROM | |
| 353 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 354 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
| 355 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
| 356 #endif | |
| 357 ioctl(cdrom->id, CDIOCSTART, 0); | |
| 358 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
| 359 } | |
| 360 | |
| 361 /* Pause play */ | |
| 362 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 363 { | |
| 364 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
| 365 } | |
| 366 | |
| 367 /* Resume play */ | |
| 368 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 369 { | |
| 370 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
| 371 } | |
| 372 | |
| 373 /* Stop play */ | |
| 374 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 375 { | |
| 376 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
| 377 } | |
| 378 | |
| 379 /* Eject the CD-ROM */ | |
| 380 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 381 { | |
| 382 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
| 383 } | |
| 384 | |
| 385 /* Close the CD-ROM handle */ | |
| 386 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 387 { | |
| 388 close(cdrom->id); | |
| 389 } | |
| 390 | |
| 391 void SDL_SYS_CDQuit(void) | |
| 392 { | |
| 393 int i; | |
| 394 | |
| 395 if ( SDL_numcds > 0 ) { | |
| 396 for ( i=0; i<SDL_numcds; ++i ) { | |
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397 SDL_free(SDL_cdlist[i]); |
| 0 | 398 } |
| 399 SDL_numcds = 0; | |
| 400 } | |
| 401 } | |
| 402 |