1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 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_OPENBSD
25
26 /* Functions for system-level CD-ROM audio control */
27
28 #include <sys/types.h>
29 #include <sys/ioctl.h>
30 #include <sys/stat.h>
31 #include <fcntl.h>
32 #include <errno.h>
33 #include <unistd.h>
34 #include <sys/ioctl.h>
35 #include <sys/cdio.h>
36
37 #include "SDL_cdrom.h"
38 #include "../SDL_syscdrom.h"
39
40
41 /* The maximum number of CD-ROM drives we'll detect */
42 #define MAX_DRIVES 16
43
44 /* A list of available CD-ROM drives */
45 static char *SDL_cdlist[MAX_DRIVES];
46 static dev_t SDL_cdmode[MAX_DRIVES];
47
48 /* The system-dependent CD control functions */
49 static const char *SDL_SYS_CDName(int drive);
50 static int SDL_SYS_CDOpen(int drive);
51 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
52 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
53 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
54 static int SDL_SYS_CDPause(SDL_CD *cdrom);
55 static int SDL_SYS_CDResume(SDL_CD *cdrom);
56 static int SDL_SYS_CDStop(SDL_CD *cdrom);
57 static int SDL_SYS_CDEject(SDL_CD *cdrom);
58 static void SDL_SYS_CDClose(SDL_CD *cdrom);
59
60 /* Some ioctl() errno values which occur when the tray is empty */
61 #define ERRNO_TRAYEMPTY(errno) \
62 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \
63 (errno == ENODEV))
64
65 /* Check a drive to see if it is a CD-ROM */
CheckDrive(char * drive,struct stat * stbuf)66 static int CheckDrive(char *drive, struct stat *stbuf)
67 {
68 int is_cd, cdfd;
69 struct ioc_read_subchannel info;
70
71 /* If it doesn't exist, return -1 */
72 if ( stat(drive, stbuf) < 0 ) {
73 return(-1);
74 }
75
76 /* If it does exist, verify that it's an available CD-ROM */
77 is_cd = 0;
78 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) {
79 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0);
80 if ( cdfd >= 0 ) {
81 info.address_format = CD_MSF_FORMAT;
82 info.data_format = CD_CURRENT_POSITION;
83 info.data_len = 0;
84 info.data = NULL;
85 /* Under Linux, EIO occurs when a disk is not present.
86 This isn't 100% reliable, so we use the USE_MNTENT
87 code above instead.
88 */
89 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) ||
90 ERRNO_TRAYEMPTY(errno) ) {
91 is_cd = 1;
92 }
93 close(cdfd);
94 }
95 else if (ERRNO_TRAYEMPTY(errno))
96 is_cd = 1;
97 }
98 return(is_cd);
99 }
100
101 /* Add a CD-ROM drive to our list of valid drives */
AddDrive(char * drive,struct stat * stbuf)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] = SDL_strdup(drive);
122 if ( SDL_cdlist[i] == NULL ) {
123 SDL_OutOfMemory();
124 return;
125 }
126 SDL_cdmode[i] = stbuf->st_rdev;
127 ++SDL_numcds;
128 #ifdef DEBUG_CDROM
129 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
130 #endif
131 }
132 }
133
SDL_SYS_CDInit(void)134 int SDL_SYS_CDInit(void)
135 {
136 static char *checklist[] = {
137 #if defined(__OPENBSD__)
138 "?0 cd?c", "cdrom", NULL
139 #elif defined(__NETBSD__)
140 "?0 cd?d", "?0 cd?c", "cdrom", NULL
141 #else
142 "?0 cd?c", "?0 acd?c", "cdrom", NULL
143 #endif
144 };
145 char *SDLcdrom;
146 int i, j, exists;
147 char drive[32];
148 struct stat stbuf;
149
150 /* Fill in our driver capabilities */
151 SDL_CDcaps.Name = SDL_SYS_CDName;
152 SDL_CDcaps.Open = SDL_SYS_CDOpen;
153 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
154 SDL_CDcaps.Status = SDL_SYS_CDStatus;
155 SDL_CDcaps.Play = SDL_SYS_CDPlay;
156 SDL_CDcaps.Pause = SDL_SYS_CDPause;
157 SDL_CDcaps.Resume = SDL_SYS_CDResume;
158 SDL_CDcaps.Stop = SDL_SYS_CDStop;
159 SDL_CDcaps.Eject = SDL_SYS_CDEject;
160 SDL_CDcaps.Close = SDL_SYS_CDClose;
161
162 /* Look in the environment for our CD-ROM drive list */
163 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */
164 if ( SDLcdrom != NULL ) {
165 char *cdpath, *delim;
166 size_t len = SDL_strlen(SDLcdrom)+1;
167 cdpath = SDL_stack_alloc(char, len);
168 if ( cdpath != NULL ) {
169 SDL_strlcpy(cdpath, SDLcdrom, len);
170 SDLcdrom = cdpath;
171 do {
172 delim = SDL_strchr(SDLcdrom, ':');
173 if ( delim ) {
174 *delim++ = '\0';
175 }
176 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
177 AddDrive(SDLcdrom, &stbuf);
178 }
179 if ( delim ) {
180 SDLcdrom = delim;
181 } else {
182 SDLcdrom = NULL;
183 }
184 } while ( SDLcdrom );
185 SDL_stack_free(cdpath);
186 }
187
188 /* If we found our drives, there's nothing left to do */
189 if ( SDL_numcds > 0 ) {
190 return(0);
191 }
192 }
193
194 /* Scan the system for CD-ROM drives */
195 for ( i=0; checklist[i]; ++i ) {
196 if ( checklist[i][0] == '?' ) {
197 char *insert;
198 exists = 1;
199 for ( j=checklist[i][1]; exists; ++j ) {
200 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]);
201 insert = SDL_strchr(drive, '?');
202 if ( insert != NULL ) {
203 *insert = j;
204 }
205 switch (CheckDrive(drive, &stbuf)) {
206 /* Drive exists and is a CD-ROM */
207 case 1:
208 AddDrive(drive, &stbuf);
209 break;
210 /* Drive exists, but isn't a CD-ROM */
211 case 0:
212 break;
213 /* Drive doesn't exist */
214 case -1:
215 exists = 0;
216 break;
217 }
218 }
219 } else {
220 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]);
221 if ( CheckDrive(drive, &stbuf) > 0 ) {
222 AddDrive(drive, &stbuf);
223 }
224 }
225 }
226 return(0);
227 }
228
229 /* General ioctl() CD-ROM command function */
SDL_SYS_CDioctl(int id,int command,void * arg)230 static int SDL_SYS_CDioctl(int id, int command, void *arg)
231 {
232 int retval;
233
234 retval = ioctl(id, command, arg);
235 if ( retval < 0 ) {
236 SDL_SetError("ioctl() error: %s", strerror(errno));
237 }
238 return(retval);
239 }
240
SDL_SYS_CDName(int drive)241 static const char *SDL_SYS_CDName(int drive)
242 {
243 return(SDL_cdlist[drive]);
244 }
245
SDL_SYS_CDOpen(int drive)246 static int SDL_SYS_CDOpen(int drive)
247 {
248 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0));
249 }
250
SDL_SYS_CDGetTOC(SDL_CD * cdrom)251 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
252 {
253 struct ioc_toc_header toc;
254 int i, okay;
255 struct ioc_read_toc_entry entry;
256 struct cd_toc_entry data;
257
258 okay = 0;
259 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) {
260 cdrom->numtracks = toc.ending_track-toc.starting_track+1;
261 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
262 cdrom->numtracks = SDL_MAX_TRACKS;
263 }
264 /* Read all the track TOC entries */
265 for ( i=0; i<=cdrom->numtracks; ++i ) {
266 if ( i == cdrom->numtracks ) {
267 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */
268 } else {
269 cdrom->track[i].id = toc.starting_track+i;
270 }
271 entry.starting_track = cdrom->track[i].id;
272 entry.address_format = CD_MSF_FORMAT;
273 entry.data_len = sizeof(data);
274 entry.data = &data;
275 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS,
276 &entry) < 0 ) {
277 break;
278 } else {
279 cdrom->track[i].type = data.control;
280 cdrom->track[i].offset = MSF_TO_FRAMES(
281 data.addr.msf.minute,
282 data.addr.msf.second,
283 data.addr.msf.frame);
284 cdrom->track[i].length = 0;
285 if ( i > 0 ) {
286 cdrom->track[i-1].length =
287 cdrom->track[i].offset-
288 cdrom->track[i-1].offset;
289 }
290 }
291 }
292 if ( i == (cdrom->numtracks+1) ) {
293 okay = 1;
294 }
295 }
296 return(okay ? 0 : -1);
297 }
298
299 /* Get CD-ROM status */
SDL_SYS_CDStatus(SDL_CD * cdrom,int * position)300 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
301 {
302 CDstatus status;
303 struct ioc_toc_header toc;
304 struct ioc_read_subchannel info;
305 struct cd_sub_channel_info data;
306
307 info.address_format = CD_MSF_FORMAT;
308 info.data_format = CD_CURRENT_POSITION;
309 info.track = 0;
310 info.data_len = sizeof(data);
311 info.data = &data;
312 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) {
313 if ( ERRNO_TRAYEMPTY(errno) ) {
314 status = CD_TRAYEMPTY;
315 } else {
316 status = CD_ERROR;
317 }
318 } else {
319 switch (data.header.audio_status) {
320 case CD_AS_AUDIO_INVALID:
321 case CD_AS_NO_STATUS:
322 /* Try to determine if there's a CD available */
323 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0)
324 status = CD_STOPPED;
325 else
326 status = CD_TRAYEMPTY;
327 break;
328 case CD_AS_PLAY_COMPLETED:
329 status = CD_STOPPED;
330 break;
331 case CD_AS_PLAY_IN_PROGRESS:
332 status = CD_PLAYING;
333 break;
334 case CD_AS_PLAY_PAUSED:
335 status = CD_PAUSED;
336 break;
337 default:
338 status = CD_ERROR;
339 break;
340 }
341 }
342 if ( position ) {
343 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
344 *position = MSF_TO_FRAMES(
345 data.what.position.absaddr.msf.minute,
346 data.what.position.absaddr.msf.second,
347 data.what.position.absaddr.msf.frame);
348 } else {
349 *position = 0;
350 }
351 }
352 return(status);
353 }
354
355 /* Start play */
SDL_SYS_CDPlay(SDL_CD * cdrom,int start,int length)356 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
357 {
358 struct ioc_play_msf playtime;
359
360 FRAMES_TO_MSF(start,
361 &playtime.start_m, &playtime.start_s, &playtime.start_f);
362 FRAMES_TO_MSF(start+length,
363 &playtime.end_m, &playtime.end_s, &playtime.end_f);
364 #ifdef DEBUG_CDROM
365 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
366 playtime.start_m, playtime.start_s, playtime.start_f,
367 playtime.end_m, playtime.end_s, playtime.end_f);
368 #endif
369 ioctl(cdrom->id, CDIOCSTART, 0);
370 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime));
371 }
372
373 /* Pause play */
SDL_SYS_CDPause(SDL_CD * cdrom)374 static int SDL_SYS_CDPause(SDL_CD *cdrom)
375 {
376 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0));
377 }
378
379 /* Resume play */
SDL_SYS_CDResume(SDL_CD * cdrom)380 static int SDL_SYS_CDResume(SDL_CD *cdrom)
381 {
382 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0));
383 }
384
385 /* Stop play */
SDL_SYS_CDStop(SDL_CD * cdrom)386 static int SDL_SYS_CDStop(SDL_CD *cdrom)
387 {
388 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0));
389 }
390
391 /* Eject the CD-ROM */
SDL_SYS_CDEject(SDL_CD * cdrom)392 static int SDL_SYS_CDEject(SDL_CD *cdrom)
393 {
394 SDL_SYS_CDioctl(cdrom->id, CDIOCALLOW, 0);
395 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0));
396 }
397
398 /* Close the CD-ROM handle */
SDL_SYS_CDClose(SDL_CD * cdrom)399 static void SDL_SYS_CDClose(SDL_CD *cdrom)
400 {
401 close(cdrom->id);
402 }
403
SDL_SYS_CDQuit(void)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 SDL_free(SDL_cdlist[i]);
411 }
412 SDL_numcds = 0;
413 }
414 }
415
416 #endif /* SDL_CDROM_OPENBSD */
417