Mercurial > sdl-ios-xcode
annotate src/cdrom/freebsd/SDL_syscdrom.c @ 894:1d1a823904d8
Don't crash if the stretch routines are used on hardware surfaces
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 16 May 2004 21:08:55 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
297
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changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Functions for system-level CD-ROM audio control */ | |
| 29 | |
| 30 #include <sys/types.h> | |
| 31 #include <stdlib.h> | |
| 32 #include <sys/stat.h> | |
| 33 #include <fcntl.h> | |
| 34 #include <stdio.h> | |
| 35 #include <string.h> | |
| 36 #include <errno.h> | |
| 37 #include <unistd.h> | |
| 38 #include <sys/cdio.h> | |
| 39 | |
| 40 #include "SDL_error.h" | |
| 41 #include "SDL_cdrom.h" | |
| 42 #include "SDL_syscdrom.h" | |
| 43 | |
| 44 | |
| 45 /* The maximum number of CD-ROM drives we'll detect */ | |
| 46 #define MAX_DRIVES 16 | |
| 47 | |
| 48 /* A list of available CD-ROM drives */ | |
| 49 static char *SDL_cdlist[MAX_DRIVES]; | |
| 50 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 51 | |
| 52 /* The system-dependent CD control functions */ | |
| 53 static const char *SDL_SYS_CDName(int drive); | |
| 54 static int SDL_SYS_CDOpen(int drive); | |
| 55 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 56 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 57 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 58 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 59 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 60 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 61 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 62 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 63 | |
| 64 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 65 #define ERRNO_TRAYEMPTY(errno) \ | |
| 66 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) | |
| 67 | |
| 68 /* Check a drive to see if it is a CD-ROM */ | |
| 69 static int CheckDrive(char *drive, struct stat *stbuf) | |
| 70 { | |
| 71 int is_cd, cdfd; | |
| 72 struct ioc_read_subchannel info; | |
| 73 | |
| 74 /* If it doesn't exist, return -1 */ | |
| 75 if ( stat(drive, stbuf) < 0 ) { | |
| 76 return(-1); | |
| 77 } | |
| 78 | |
| 79 /* If it does exist, verify that it's an available CD-ROM */ | |
| 80 is_cd = 0; | |
| 81 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 82 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 83 if ( cdfd >= 0 ) { | |
| 84 info.address_format = CD_MSF_FORMAT; | |
| 85 info.data_format = CD_CURRENT_POSITION; | |
| 86 info.data_len = 0; | |
| 87 info.data = NULL; | |
| 88 /* Under Linux, EIO occurs when a disk is not present. | |
| 89 This isn't 100% reliable, so we use the USE_MNTENT | |
| 90 code above instead. | |
| 91 */ | |
| 92 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
| 93 ERRNO_TRAYEMPTY(errno) ) { | |
| 94 is_cd = 1; | |
| 95 } | |
| 96 close(cdfd); | |
| 97 } | |
| 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 /* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c | |
| 139 /dev/matcd?c /dev/mcd?c /dev/scd?c */ | |
| 140 static char *checklist[] = { | |
| 141 "cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL | |
| 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 */ | |
| 161 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */ | |
| 162 if ( SDLcdrom != NULL ) { | |
| 163 char *cdpath, *delim; | |
| 164 cdpath = malloc(strlen(SDLcdrom)+1); | |
| 165 if ( cdpath != NULL ) { | |
| 166 strcpy(cdpath, SDLcdrom); | |
| 167 SDLcdrom = cdpath; | |
| 168 do { | |
| 169 delim = strchr(SDLcdrom, ':'); | |
| 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 ); | |
| 182 free(cdpath); | |
| 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 ) { | |
| 197 sprintf(drive, "/dev/%sc", &checklist[i][3]); | |
| 198 insert = strchr(drive, '?'); | |
| 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 { | |
| 217 sprintf(drive, "/dev/%s", checklist[i]); | |
| 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.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
| 364 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
| 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 ) { | |
| 406 free(SDL_cdlist[i]); | |
| 407 } | |
| 408 SDL_numcds = 0; | |
| 409 } | |
| 410 } | |
| 411 |