Mercurial > sdl-ios-xcode
annotate src/cdrom/qnx/SDL_syscdrom.c @ 492:c59692dcdce0
*** empty log message ***
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Mon, 16 Sep 2002 06:17:34 +0000 |
| parents | f6ffac90895c |
| children | 8e3ce997621c |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
297
f6ffac90895c
Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents:
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 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 <sys/ioctl.h> | |
| 34 #include <fcntl.h> | |
| 35 #include <stdio.h> | |
| 36 #include <string.h> | |
| 37 #include <errno.h> | |
| 38 #include <unistd.h> | |
| 39 #include <sys/cdrom.h> | |
| 40 #include <sys/dcmd_cam.h> | |
| 41 | |
| 42 | |
| 43 #include "SDL_error.h" | |
| 44 #include "SDL_cdrom.h" | |
| 45 #include "SDL_syscdrom.h" | |
| 46 | |
| 47 | |
| 48 /* The maximum number of CD-ROM drives we'll detect */ | |
| 49 #define MAX_DRIVES 16 | |
| 50 | |
| 51 /* A list of available CD-ROM drives */ | |
| 52 static char *SDL_cdlist[MAX_DRIVES]; | |
| 53 static dev_t SDL_cdmode[MAX_DRIVES]; | |
| 54 | |
| 55 /* The system-dependent CD control functions */ | |
| 56 static const char *SDL_SYS_CDName(int drive); | |
| 57 static int SDL_SYS_CDOpen(int drive); | |
| 58 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
| 59 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
| 60 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
| 61 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
| 62 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
| 63 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
| 64 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
| 65 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
| 66 | |
| 67 /* Some ioctl() errno values which occur when the tray is empty */ | |
| 68 #define ERRNO_TRAYEMPTY(errno) \ | |
| 69 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) | |
| 70 | |
| 71 /* Check a drive to see if it is a CD-ROM */ | |
| 72 static int CheckDrive(char *drive, char *mnttype, struct stat *stbuf) | |
| 73 { | |
| 74 int is_cd, cdfd; | |
| 75 cdrom_subch_data_t info; | |
| 76 | |
| 77 /* If it doesn't exist, return -1 */ | |
| 78 if ( stat(drive, stbuf) < 0 ) { | |
| 79 return(-1); | |
| 80 } | |
| 81 | |
| 82 /* If it does exist, verify that it's an available CD-ROM */ | |
| 83 is_cd = 0; | |
| 84 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
| 85 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
| 86 if ( cdfd >= 0 ) { | |
| 87 info.subch_command.data_format = CDROM_MSF; | |
| 88 /* Under Linux, EIO occurs when a disk is not present. | |
| 89 */ | |
| 90 if ((devctl(cdfd,DCMD_CAM_CDROMSUBCHNL,&info,sizeof(info),0) == 0) || | |
| 91 ERRNO_TRAYEMPTY(errno) ) | |
| 92 { | |
| 93 is_cd = 1; | |
| 94 } | |
| 95 close(cdfd); | |
| 96 } | |
| 97 } | |
| 98 return(is_cd); | |
| 99 } | |
| 100 | |
| 101 /* Add a CD-ROM drive to our list of valid drives */ | |
| 102 static void AddDrive(char *drive, struct stat *stbuf) | |
| 103 { | |
| 104 int i; | |
| 105 | |
| 106 if ( SDL_numcds < MAX_DRIVES ) { | |
| 107 /* Check to make sure it's not already in our list. | |
| 108 This can happen when we see a drive via symbolic link. | |
| 109 */ | |
| 110 for ( i=0; i<SDL_numcds; ++i ) { | |
| 111 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
| 112 #ifdef DEBUG_CDROM | |
| 113 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
| 114 #endif | |
| 115 return; | |
| 116 } | |
| 117 } | |
| 118 | |
| 119 /* Add this drive to our list */ | |
| 120 i = SDL_numcds; | |
| 121 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1); | |
| 122 if ( SDL_cdlist[i] == NULL ) { | |
| 123 SDL_OutOfMemory(); | |
| 124 return; | |
| 125 } | |
| 126 strcpy(SDL_cdlist[i], drive); | |
| 127 SDL_cdmode[i] = stbuf->st_rdev; | |
| 128 ++SDL_numcds; | |
| 129 #ifdef DEBUG_CDROM | |
| 130 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
| 131 #endif | |
| 132 } | |
| 133 } | |
| 134 | |
| 135 int SDL_SYS_CDInit(void) | |
| 136 { | |
| 137 /* checklist: /dev/cdrom, /dev/hd?, /dev/scd? /dev/sr? */ | |
| 138 static char *checklist[] = { | |
| 139 "cdrom", "?0 cd?", "?1 cd?", "?a hd?", "?0 scd?", "?0 sr?", NULL | |
| 140 }; | |
| 141 char *SDLcdrom; | |
| 142 int i, j, exists; | |
| 143 char drive[32]; | |
| 144 struct stat stbuf; | |
| 145 | |
| 146 /* Fill in our driver capabilities */ | |
| 147 SDL_CDcaps.Name = SDL_SYS_CDName; | |
| 148 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
| 149 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
| 150 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
| 151 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
| 152 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
| 153 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
| 154 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
| 155 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
| 156 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
| 157 | |
| 158 /* Look in the environment for our CD-ROM drive list */ | |
| 159 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */ | |
| 160 if ( SDLcdrom != NULL ) { | |
| 161 char *cdpath, *delim; | |
| 162 cdpath = malloc(strlen(SDLcdrom)+1); | |
| 163 if ( cdpath != NULL ) { | |
| 164 strcpy(cdpath, SDLcdrom); | |
| 165 SDLcdrom = cdpath; | |
| 166 do { | |
| 167 delim = strchr(SDLcdrom, ':'); | |
| 168 if ( delim ) { | |
| 169 *delim++ = '\0'; | |
| 170 } | |
| 171 #ifdef DEBUG_CDROM | |
| 172 fprintf(stderr, "Checking CD-ROM drive from SDL_CDROM: %s\n", SDLcdrom); | |
| 173 #endif | |
| 174 if ( CheckDrive(SDLcdrom, NULL, &stbuf) > 0 ) { | |
| 175 AddDrive(SDLcdrom, &stbuf); | |
| 176 } | |
| 177 if ( delim ) { | |
| 178 SDLcdrom = delim; | |
| 179 } else { | |
| 180 SDLcdrom = NULL; | |
| 181 } | |
| 182 } while ( SDLcdrom ); | |
| 183 free(cdpath); | |
| 184 } | |
| 185 | |
| 186 /* If we found our drives, there's nothing left to do */ | |
| 187 if ( SDL_numcds > 0 ) { | |
| 188 return(0); | |
| 189 } | |
| 190 } | |
| 191 | |
| 192 /* Scan the system for CD-ROM drives */ | |
| 193 for ( i=0; checklist[i]; ++i ) { | |
| 194 if ( checklist[i][0] == '?' ) { | |
| 195 char *insert; | |
| 196 exists = 1; | |
| 197 for ( j=checklist[i][1]; exists; ++j ) { | |
| 198 sprintf(drive, "/dev/%s", &checklist[i][3]); | |
| 199 insert = strchr(drive, '?'); | |
| 200 if ( insert != NULL ) { | |
| 201 *insert = j; | |
| 202 } | |
| 203 #ifdef DEBUG_CDROM | |
| 204 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 205 #endif | |
| 206 switch (CheckDrive(drive, NULL, &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 #ifdef DEBUG_CDROM | |
| 223 fprintf(stderr, "Checking possible CD-ROM drive: %s\n", drive); | |
| 224 #endif | |
| 225 if ( CheckDrive(drive, NULL, &stbuf) > 0 ) { | |
| 226 AddDrive(drive, &stbuf); | |
| 227 } | |
| 228 } | |
| 229 } | |
| 230 return(0); | |
| 231 } | |
| 232 | |
| 233 static const char *SDL_SYS_CDName(int drive) | |
| 234 { | |
| 235 return(SDL_cdlist[drive]); | |
| 236 } | |
| 237 | |
| 238 static int SDL_SYS_CDOpen(int drive) | |
| 239 { | |
| 240 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
| 241 } | |
| 242 | |
| 243 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
| 244 { | |
| 245 cdrom_read_toc_t toc; | |
| 246 int i, okay; | |
| 247 | |
| 248 okay = 0; | |
| 249 if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), 0) == 0) { | |
| 250 cdrom->numtracks = toc.last_track - toc.first_track + 1; | |
| 251 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
| 252 cdrom->numtracks = SDL_MAX_TRACKS; | |
| 253 } | |
| 254 /* Read all the track TOC entries */ | |
| 255 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
| 256 if ( i == cdrom->numtracks ) { | |
| 257 cdrom->track[i].id = CDROM_LEADOUT; | |
| 258 } else { | |
| 259 #if 0 /* Sam 11/6/00 - an obsolete field? */ | |
| 260 cdrom->track[i].id = toc.cdth_trk0+i; | |
| 261 #else | |
| 262 cdrom->track[i].id = toc.first_track+i; | |
| 263 #endif | |
| 264 } | |
| 265 cdrom->track[i].type = toc.toc_entry[i].control_adr; | |
| 266 cdrom->track[i].offset = MSF_TO_FRAMES( | |
| 267 toc.toc_entry[i].addr.msf.minute, | |
| 268 toc.toc_entry[i].addr.msf.second, | |
| 269 toc.toc_entry[i].addr.msf.frame); | |
| 270 cdrom->track[i].length = 0; | |
| 271 if ( i > 0 ) { | |
| 272 cdrom->track[i-1].length = | |
| 273 cdrom->track[i].offset- | |
| 274 cdrom->track[i-1].offset; | |
| 275 } | |
| 276 } | |
| 277 if ( i == (cdrom->numtracks+1) ) { | |
| 278 okay = 1; | |
| 279 } | |
| 280 } | |
| 281 return(okay ? 0 : -1); | |
| 282 } | |
| 283 | |
| 284 /* Get CD-ROM status */ | |
| 285 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
| 286 { | |
| 287 CDstatus status; | |
| 288 cdrom_read_toc_t toc; | |
| 289 subch_current_position_t info; | |
| 290 | |
| 291 #if 0 /* Sam 11/6/00 - an obsolete field? */ | |
| 292 info.subch_command.data_format = CDROM_SUBCH_CURRENT_POSITION; | |
| 293 info.subch_command.track_number = 0; | |
| 294 #else | |
| 295 info.data_format = CDROM_SUBCH_CURRENT_POSITION; | |
| 296 info.track_number = 0; | |
| 297 #endif | |
| 298 if (devctl(cdrom->id, DCMD_CAM_CDROMSUBCHNL, &info, sizeof(info), 0) != 0) { | |
| 299 if ( ERRNO_TRAYEMPTY(errno) ) { | |
| 300 status = CD_TRAYEMPTY; | |
| 301 } else { | |
| 302 status = CD_ERROR; | |
| 303 } | |
| 304 } else { | |
| 305 switch (info.header.audio_status) { | |
| 306 case CDROM_AUDIO_INVALID: | |
| 307 case CDROM_AUDIO_NO_STATUS: | |
| 308 /* Try to determine if there's a CD available */ | |
| 309 if (devctl(cdrom->id, DCMD_CAM_CDROMREADTOC, &toc, sizeof(toc), 0)==0) | |
| 310 status = CD_STOPPED; | |
| 311 else | |
| 312 status = CD_TRAYEMPTY; | |
| 313 break; | |
| 314 case CDROM_AUDIO_COMPLETED: | |
| 315 status = CD_STOPPED; | |
| 316 break; | |
| 317 case CDROM_AUDIO_PLAY: | |
| 318 status = CD_PLAYING; | |
| 319 break; | |
| 320 case CDROM_AUDIO_PAUSED: | |
| 321 /* Workaround buggy CD-ROM drive */ | |
| 322 if ( info.data_format == CDROM_LEADOUT ) { | |
| 323 status = CD_STOPPED; | |
| 324 } else { | |
| 325 status = CD_PAUSED; | |
| 326 } | |
| 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 info.addr.msf.minute, | |
| 337 info.addr.msf.second, | |
| 338 info.addr.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 cdrom_playmsf_t playtime; | |
| 350 | |
| 351 FRAMES_TO_MSF(start, | |
| 352 &playtime.start_minute, &playtime.start_second, &playtime.start_frame); | |
| 353 FRAMES_TO_MSF(start+length, | |
| 354 &playtime.end_minute, &playtime.end_second, &playtime.end_frame); | |
| 355 #ifdef DEBUG_CDROM | |
| 356 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
| 357 playtime.start_minute, playtime.start_second, playtime.start_frame, | |
| 358 playtime.end_minute, playtime.end_second, playtime.end_frame); | |
| 359 #endif | |
| 360 return(devctl(cdrom->id, DCMD_CAM_CDROMPLAYMSF, &playtime, sizeof(playtime), 0)); | |
| 361 } | |
| 362 | |
| 363 /* Pause play */ | |
| 364 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 365 { | |
| 366 return(devctl(cdrom->id, DCMD_CAM_CDROMPAUSE, NULL, 0, 0)); | |
| 367 } | |
| 368 | |
| 369 /* Resume play */ | |
| 370 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 371 { | |
| 372 return(devctl(cdrom->id, DCMD_CAM_CDROMRESUME, NULL, 0, 0)); | |
| 373 } | |
| 374 | |
| 375 /* Stop play */ | |
| 376 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 377 { | |
| 378 return(devctl(cdrom->id, DCMD_CAM_CDROMSTOP, NULL, 0, 0)); | |
| 379 } | |
| 380 | |
| 381 /* Eject the CD-ROM */ | |
| 382 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 383 { | |
| 384 return(devctl(cdrom->id, DCMD_CAM_EJECT_MEDIA, NULL, 0, 0)); | |
| 385 } | |
| 386 | |
| 387 /* Close the CD-ROM handle */ | |
| 388 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 389 { | |
| 390 close(cdrom->id); | |
| 391 } | |
| 392 | |
| 393 void SDL_SYS_CDQuit(void) | |
| 394 { | |
| 395 int i; | |
| 396 | |
| 397 if ( SDL_numcds > 0 ) { | |
| 398 for ( i=0; i<SDL_numcds; ++i ) { | |
| 399 free(SDL_cdlist[i]); | |
| 400 } | |
| 401 SDL_numcds = 0; | |
| 402 } | |
| 403 } | |
| 404 |