Mercurial > sdl-ios-xcode
annotate src/cdrom/openbsd/SDL_syscdrom.c @ 1635:92947e3a18db
Make sure code is only compiled if the appropriate subsystem is enabled
author | Sam Lantinga <slouken@libsdl.org> |
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date | Fri, 14 Apr 2006 04:46:47 +0000 |
parents | d910939febfa |
children | 782fd950bd46 c121d94672cb a1b03ba2fcd0 |
rev | line source |
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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 */ |
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22 #include "SDL_config.h" |
0 | 23 |
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24 #ifdef SDL_CDROM_OPENBSD |
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25 |
0 | 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> | |
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34 #include <sys/ioctl.h> |
0 | 35 #include <sys/cdio.h> |
36 | |
37 #include "SDL_cdrom.h" | |
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38 #include "../SDL_syscdrom.h" |
0 | 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) \ | |
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62 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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63 (errno == ENODEV)) |
0 | 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 } | |
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95 else if (ERRNO_TRAYEMPTY(errno)) |
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96 is_cd = 1; |
0 | 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; | |
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121 SDL_cdlist[i] = SDL_strdup(drive); |
0 | 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[] = { | |
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137 #if defined(__OPENBSD__) |
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138 "?0 cd?c", "cdrom", NULL |
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139 #elif defined(__NETBSD__) |
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140 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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141 #else |
0 | 142 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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143 #endif |
0 | 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 */ | |
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163 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
0 | 164 if ( SDLcdrom != NULL ) { |
165 char *cdpath, *delim; | |
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166 size_t len = SDL_strlen(SDLcdrom)+1; |
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167 cdpath = SDL_stack_alloc(char, len); |
0 | 168 if ( cdpath != NULL ) { |
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169 SDL_strlcpy(cdpath, SDLcdrom, len); |
0 | 170 SDLcdrom = cdpath; |
171 do { | |
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172 delim = SDL_strchr(SDLcdrom, ':'); |
0 | 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 ); | |
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185 SDL_stack_free(cdpath); |
0 | 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 ) { | |
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200 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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201 insert = SDL_strchr(drive, '?'); |
0 | 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 { | |
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220 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
0 | 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 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
395 } | |
396 | |
397 /* Close the CD-ROM handle */ | |
398 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
399 { | |
400 close(cdrom->id); | |
401 } | |
402 | |
403 void SDL_SYS_CDQuit(void) | |
404 { | |
405 int i; | |
406 | |
407 if ( SDL_numcds > 0 ) { | |
408 for ( i=0; i<SDL_numcds; ++i ) { | |
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409 SDL_free(SDL_cdlist[i]); |
0 | 410 } |
411 SDL_numcds = 0; | |
412 } | |
413 } | |
414 | |
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415 #endif /* SDL_CDROM_OPENBSD */ |