Mercurial > sdl-ios-xcode
annotate src/cdrom/freebsd/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_FREEBSD |
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25 |
0 | 26 /* Functions for system-level CD-ROM audio control */ |
27 | |
28 #include <sys/types.h> | |
29 #include <sys/stat.h> | |
30 #include <fcntl.h> | |
31 #include <errno.h> | |
32 #include <unistd.h> | |
33 #include <sys/cdio.h> | |
34 | |
35 #include "SDL_cdrom.h" | |
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36 #include "../SDL_syscdrom.h" |
0 | 37 |
38 | |
39 /* The maximum number of CD-ROM drives we'll detect */ | |
40 #define MAX_DRIVES 16 | |
41 | |
42 /* A list of available CD-ROM drives */ | |
43 static char *SDL_cdlist[MAX_DRIVES]; | |
44 static dev_t SDL_cdmode[MAX_DRIVES]; | |
45 | |
46 /* The system-dependent CD control functions */ | |
47 static const char *SDL_SYS_CDName(int drive); | |
48 static int SDL_SYS_CDOpen(int drive); | |
49 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
50 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
51 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
52 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
53 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
54 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
55 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
56 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
57 | |
58 /* Some ioctl() errno values which occur when the tray is empty */ | |
59 #define ERRNO_TRAYEMPTY(errno) \ | |
60 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL)) | |
61 | |
62 /* Check a drive to see if it is a CD-ROM */ | |
63 static int CheckDrive(char *drive, struct stat *stbuf) | |
64 { | |
65 int is_cd, cdfd; | |
66 struct ioc_read_subchannel info; | |
67 | |
68 /* If it doesn't exist, return -1 */ | |
69 if ( stat(drive, stbuf) < 0 ) { | |
70 return(-1); | |
71 } | |
72 | |
73 /* If it does exist, verify that it's an available CD-ROM */ | |
74 is_cd = 0; | |
75 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
76 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
77 if ( cdfd >= 0 ) { | |
78 info.address_format = CD_MSF_FORMAT; | |
79 info.data_format = CD_CURRENT_POSITION; | |
80 info.data_len = 0; | |
81 info.data = NULL; | |
82 /* Under Linux, EIO occurs when a disk is not present. | |
83 This isn't 100% reliable, so we use the USE_MNTENT | |
84 code above instead. | |
85 */ | |
86 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
87 ERRNO_TRAYEMPTY(errno) ) { | |
88 is_cd = 1; | |
89 } | |
90 close(cdfd); | |
91 } | |
92 } | |
93 return(is_cd); | |
94 } | |
95 | |
96 /* Add a CD-ROM drive to our list of valid drives */ | |
97 static void AddDrive(char *drive, struct stat *stbuf) | |
98 { | |
99 int i; | |
100 | |
101 if ( SDL_numcds < MAX_DRIVES ) { | |
102 /* Check to make sure it's not already in our list. | |
103 This can happen when we see a drive via symbolic link. | |
104 */ | |
105 for ( i=0; i<SDL_numcds; ++i ) { | |
106 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
107 #ifdef DEBUG_CDROM | |
108 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
109 #endif | |
110 return; | |
111 } | |
112 } | |
113 | |
114 /* Add this drive to our list */ | |
115 i = SDL_numcds; | |
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116 SDL_cdlist[i] = SDL_strdup(drive); |
0 | 117 if ( SDL_cdlist[i] == NULL ) { |
118 SDL_OutOfMemory(); | |
119 return; | |
120 } | |
121 SDL_cdmode[i] = stbuf->st_rdev; | |
122 ++SDL_numcds; | |
123 #ifdef DEBUG_CDROM | |
124 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
125 #endif | |
126 } | |
127 } | |
128 | |
129 int SDL_SYS_CDInit(void) | |
130 { | |
131 /* checklist: /dev/cdrom,/dev/cd?c /dev/acd?c | |
132 /dev/matcd?c /dev/mcd?c /dev/scd?c */ | |
133 static char *checklist[] = { | |
134 "cdrom", "?0 cd?", "?0 acd?", "?0 matcd?", "?0 mcd?", "?0 scd?",NULL | |
135 }; | |
136 char *SDLcdrom; | |
137 int i, j, exists; | |
138 char drive[32]; | |
139 struct stat stbuf; | |
140 | |
141 /* Fill in our driver capabilities */ | |
142 SDL_CDcaps.Name = SDL_SYS_CDName; | |
143 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
144 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
145 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
146 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
147 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
148 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
149 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
150 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
151 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
152 | |
153 /* Look in the environment for our CD-ROM drive list */ | |
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154 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
0 | 155 if ( SDLcdrom != NULL ) { |
156 char *cdpath, *delim; | |
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157 size_t len = SDL_strlen(SDLcdrom)+1; |
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158 cdpath = SDL_stack_alloc(char, len); |
0 | 159 if ( cdpath != NULL ) { |
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160 SDL_strlcpy(cdpath, SDLcdrom, len); |
0 | 161 SDLcdrom = cdpath; |
162 do { | |
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163 delim = SDL_strchr(SDLcdrom, ':'); |
0 | 164 if ( delim ) { |
165 *delim++ = '\0'; | |
166 } | |
167 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
168 AddDrive(SDLcdrom, &stbuf); | |
169 } | |
170 if ( delim ) { | |
171 SDLcdrom = delim; | |
172 } else { | |
173 SDLcdrom = NULL; | |
174 } | |
175 } while ( SDLcdrom ); | |
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176 SDL_stack_free(cdpath); |
0 | 177 } |
178 | |
179 /* If we found our drives, there's nothing left to do */ | |
180 if ( SDL_numcds > 0 ) { | |
181 return(0); | |
182 } | |
183 } | |
184 | |
185 /* Scan the system for CD-ROM drives */ | |
186 for ( i=0; checklist[i]; ++i ) { | |
187 if ( checklist[i][0] == '?' ) { | |
188 char *insert; | |
189 exists = 1; | |
190 for ( j=checklist[i][1]; exists; ++j ) { | |
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191 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%sc", &checklist[i][3]); |
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192 insert = SDL_strchr(drive, '?'); |
0 | 193 if ( insert != NULL ) { |
194 *insert = j; | |
195 } | |
196 switch (CheckDrive(drive, &stbuf)) { | |
197 /* Drive exists and is a CD-ROM */ | |
198 case 1: | |
199 AddDrive(drive, &stbuf); | |
200 break; | |
201 /* Drive exists, but isn't a CD-ROM */ | |
202 case 0: | |
203 break; | |
204 /* Drive doesn't exist */ | |
205 case -1: | |
206 exists = 0; | |
207 break; | |
208 } | |
209 } | |
210 } else { | |
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211 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
0 | 212 if ( CheckDrive(drive, &stbuf) > 0 ) { |
213 AddDrive(drive, &stbuf); | |
214 } | |
215 } | |
216 } | |
217 return(0); | |
218 } | |
219 | |
220 /* General ioctl() CD-ROM command function */ | |
221 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
222 { | |
223 int retval; | |
224 | |
225 retval = ioctl(id, command, arg); | |
226 if ( retval < 0 ) { | |
227 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
228 } | |
229 return(retval); | |
230 } | |
231 | |
232 static const char *SDL_SYS_CDName(int drive) | |
233 { | |
234 return(SDL_cdlist[drive]); | |
235 } | |
236 | |
237 static int SDL_SYS_CDOpen(int drive) | |
238 { | |
239 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
240 } | |
241 | |
242 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
243 { | |
244 struct ioc_toc_header toc; | |
245 int i, okay; | |
246 struct ioc_read_toc_entry entry; | |
247 struct cd_toc_entry data; | |
248 | |
249 okay = 0; | |
250 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
251 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
252 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
253 cdrom->numtracks = SDL_MAX_TRACKS; | |
254 } | |
255 /* Read all the track TOC entries */ | |
256 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
257 if ( i == cdrom->numtracks ) { | |
258 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
259 } else { | |
260 cdrom->track[i].id = toc.starting_track+i; | |
261 } | |
262 entry.starting_track = cdrom->track[i].id; | |
263 entry.address_format = CD_MSF_FORMAT; | |
264 entry.data_len = sizeof(data); | |
265 entry.data = &data; | |
266 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
267 &entry) < 0 ) { | |
268 break; | |
269 } else { | |
270 cdrom->track[i].type = data.control; | |
271 cdrom->track[i].offset = MSF_TO_FRAMES( | |
272 data.addr.msf.minute, | |
273 data.addr.msf.second, | |
274 data.addr.msf.frame); | |
275 cdrom->track[i].length = 0; | |
276 if ( i > 0 ) { | |
277 cdrom->track[i-1].length = | |
278 cdrom->track[i].offset- | |
279 cdrom->track[i-1].offset; | |
280 } | |
281 } | |
282 } | |
283 if ( i == (cdrom->numtracks+1) ) { | |
284 okay = 1; | |
285 } | |
286 } | |
287 return(okay ? 0 : -1); | |
288 } | |
289 | |
290 /* Get CD-ROM status */ | |
291 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
292 { | |
293 CDstatus status; | |
294 struct ioc_toc_header toc; | |
295 struct ioc_read_subchannel info; | |
296 struct cd_sub_channel_info data; | |
297 | |
298 info.address_format = CD_MSF_FORMAT; | |
299 info.data_format = CD_CURRENT_POSITION; | |
300 info.track = 0; | |
301 info.data_len = sizeof(data); | |
302 info.data = &data; | |
303 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
304 if ( ERRNO_TRAYEMPTY(errno) ) { | |
305 status = CD_TRAYEMPTY; | |
306 } else { | |
307 status = CD_ERROR; | |
308 } | |
309 } else { | |
310 switch (data.header.audio_status) { | |
311 case CD_AS_AUDIO_INVALID: | |
312 case CD_AS_NO_STATUS: | |
313 /* Try to determine if there's a CD available */ | |
314 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
315 status = CD_STOPPED; | |
316 else | |
317 status = CD_TRAYEMPTY; | |
318 break; | |
319 case CD_AS_PLAY_COMPLETED: | |
320 status = CD_STOPPED; | |
321 break; | |
322 case CD_AS_PLAY_IN_PROGRESS: | |
323 status = CD_PLAYING; | |
324 break; | |
325 case CD_AS_PLAY_PAUSED: | |
326 status = CD_PAUSED; | |
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 data.what.position.absaddr.msf.minute, | |
337 data.what.position.absaddr.msf.second, | |
338 data.what.position.absaddr.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 struct ioc_play_msf playtime; | |
350 | |
351 FRAMES_TO_MSF(start, | |
352 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
353 FRAMES_TO_MSF(start+length, | |
354 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
355 #ifdef DEBUG_CDROM | |
356 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
357 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
358 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
359 #endif | |
360 ioctl(cdrom->id, CDIOCSTART, 0); | |
361 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
362 } | |
363 | |
364 /* Pause play */ | |
365 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
366 { | |
367 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
368 } | |
369 | |
370 /* Resume play */ | |
371 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
372 { | |
373 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
374 } | |
375 | |
376 /* Stop play */ | |
377 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
378 { | |
379 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
380 } | |
381 | |
382 /* Eject the CD-ROM */ | |
383 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
384 { | |
385 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
386 } | |
387 | |
388 /* Close the CD-ROM handle */ | |
389 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
390 { | |
391 close(cdrom->id); | |
392 } | |
393 | |
394 void SDL_SYS_CDQuit(void) | |
395 { | |
396 int i; | |
397 | |
398 if ( SDL_numcds > 0 ) { | |
399 for ( i=0; i<SDL_numcds; ++i ) { | |
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400 SDL_free(SDL_cdlist[i]); |
0 | 401 } |
402 SDL_numcds = 0; | |
403 } | |
404 } | |
405 | |
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406 #endif /* SDL_CDROM_FREEBSD */ |