e14743d1 |
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_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 */ |
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 */ |
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 | |
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 */ |
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 | |
241 | static const char *SDL_SYS_CDName(int drive) |
242 | { |
243 | return(SDL_cdlist[drive]); |
244 | } |
245 | |
246 | static int SDL_SYS_CDOpen(int drive) |
247 | { |
248 | return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); |
249 | } |
250 | |
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 */ |
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 */ |
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 */ |
374 | static int SDL_SYS_CDPause(SDL_CD *cdrom) |
375 | { |
376 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); |
377 | } |
378 | |
379 | /* Resume play */ |
380 | static int SDL_SYS_CDResume(SDL_CD *cdrom) |
381 | { |
382 | return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); |
383 | } |
384 | |
385 | /* Stop play */ |
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 */ |
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 */ |
399 | static void SDL_SYS_CDClose(SDL_CD *cdrom) |
400 | { |
401 | close(cdrom->id); |
402 | } |
403 | |
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 */ |