Mercurial > sdl-ios-xcode
annotate src/cdrom/openbsd/SDL_syscdrom.c @ 1402:d910939febfa
Use consistent identifiers for the various platforms we support.
Make sure every source file includes SDL_config.h, so the proper system
headers are chosen.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Tue, 21 Feb 2006 08:46:50 +0000 |
parents | c0a74f199ecf |
children | 92947e3a18db |
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 |
24 /* Functions for system-level CD-ROM audio control */ | |
25 | |
26 #include <sys/types.h> | |
27 #include <sys/ioctl.h> | |
28 #include <sys/stat.h> | |
29 #include <fcntl.h> | |
30 #include <errno.h> | |
31 #include <unistd.h> | |
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32 #include <sys/ioctl.h> |
0 | 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) \ | |
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60 ((errno == EIO) || (errno == ENOENT) || (errno == EINVAL) || \ |
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61 (errno == ENODEV)) |
0 | 62 |
63 /* Check a drive to see if it is a CD-ROM */ | |
64 static int CheckDrive(char *drive, struct stat *stbuf) | |
65 { | |
66 int is_cd, cdfd; | |
67 struct ioc_read_subchannel info; | |
68 | |
69 /* If it doesn't exist, return -1 */ | |
70 if ( stat(drive, stbuf) < 0 ) { | |
71 return(-1); | |
72 } | |
73 | |
74 /* If it does exist, verify that it's an available CD-ROM */ | |
75 is_cd = 0; | |
76 if ( S_ISCHR(stbuf->st_mode) || S_ISBLK(stbuf->st_mode) ) { | |
77 cdfd = open(drive, (O_RDONLY|O_EXCL|O_NONBLOCK), 0); | |
78 if ( cdfd >= 0 ) { | |
79 info.address_format = CD_MSF_FORMAT; | |
80 info.data_format = CD_CURRENT_POSITION; | |
81 info.data_len = 0; | |
82 info.data = NULL; | |
83 /* Under Linux, EIO occurs when a disk is not present. | |
84 This isn't 100% reliable, so we use the USE_MNTENT | |
85 code above instead. | |
86 */ | |
87 if ( (ioctl(cdfd, CDIOCREADSUBCHANNEL, &info) == 0) || | |
88 ERRNO_TRAYEMPTY(errno) ) { | |
89 is_cd = 1; | |
90 } | |
91 close(cdfd); | |
92 } | |
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93 else if (ERRNO_TRAYEMPTY(errno)) |
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94 is_cd = 1; |
0 | 95 } |
96 return(is_cd); | |
97 } | |
98 | |
99 /* Add a CD-ROM drive to our list of valid drives */ | |
100 static void AddDrive(char *drive, struct stat *stbuf) | |
101 { | |
102 int i; | |
103 | |
104 if ( SDL_numcds < MAX_DRIVES ) { | |
105 /* Check to make sure it's not already in our list. | |
106 This can happen when we see a drive via symbolic link. | |
107 */ | |
108 for ( i=0; i<SDL_numcds; ++i ) { | |
109 if ( stbuf->st_rdev == SDL_cdmode[i] ) { | |
110 #ifdef DEBUG_CDROM | |
111 fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]); | |
112 #endif | |
113 return; | |
114 } | |
115 } | |
116 | |
117 /* Add this drive to our list */ | |
118 i = SDL_numcds; | |
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119 SDL_cdlist[i] = SDL_strdup(drive); |
0 | 120 if ( SDL_cdlist[i] == NULL ) { |
121 SDL_OutOfMemory(); | |
122 return; | |
123 } | |
124 SDL_cdmode[i] = stbuf->st_rdev; | |
125 ++SDL_numcds; | |
126 #ifdef DEBUG_CDROM | |
127 fprintf(stderr, "Added CD-ROM drive: %s\n", drive); | |
128 #endif | |
129 } | |
130 } | |
131 | |
132 int SDL_SYS_CDInit(void) | |
133 { | |
134 static char *checklist[] = { | |
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135 #if defined(__OPENBSD__) |
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136 "?0 cd?c", "cdrom", NULL |
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137 #elif defined(__NETBSD__) |
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138 "?0 cd?d", "?0 cd?c", "cdrom", NULL |
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139 #else |
0 | 140 "?0 cd?c", "?0 acd?c", "cdrom", NULL |
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141 #endif |
0 | 142 }; |
143 char *SDLcdrom; | |
144 int i, j, exists; | |
145 char drive[32]; | |
146 struct stat stbuf; | |
147 | |
148 /* Fill in our driver capabilities */ | |
149 SDL_CDcaps.Name = SDL_SYS_CDName; | |
150 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
151 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
152 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
153 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
154 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
155 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
156 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
157 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
158 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
159 | |
160 /* Look in the environment for our CD-ROM drive list */ | |
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161 SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
0 | 162 if ( SDLcdrom != NULL ) { |
163 char *cdpath, *delim; | |
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164 size_t len = SDL_strlen(SDLcdrom)+1; |
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165 cdpath = SDL_stack_alloc(char, len); |
0 | 166 if ( cdpath != NULL ) { |
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167 SDL_strlcpy(cdpath, SDLcdrom, len); |
0 | 168 SDLcdrom = cdpath; |
169 do { | |
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170 delim = SDL_strchr(SDLcdrom, ':'); |
0 | 171 if ( delim ) { |
172 *delim++ = '\0'; | |
173 } | |
174 if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) { | |
175 AddDrive(SDLcdrom, &stbuf); | |
176 } | |
177 if ( delim ) { | |
178 SDLcdrom = delim; | |
179 } else { | |
180 SDLcdrom = NULL; | |
181 } | |
182 } while ( SDLcdrom ); | |
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183 SDL_stack_free(cdpath); |
0 | 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 ) { | |
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198 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", &checklist[i][3]); |
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199 insert = SDL_strchr(drive, '?'); |
0 | 200 if ( insert != NULL ) { |
201 *insert = j; | |
202 } | |
203 switch (CheckDrive(drive, &stbuf)) { | |
204 /* Drive exists and is a CD-ROM */ | |
205 case 1: | |
206 AddDrive(drive, &stbuf); | |
207 break; | |
208 /* Drive exists, but isn't a CD-ROM */ | |
209 case 0: | |
210 break; | |
211 /* Drive doesn't exist */ | |
212 case -1: | |
213 exists = 0; | |
214 break; | |
215 } | |
216 } | |
217 } else { | |
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218 SDL_snprintf(drive, SDL_arraysize(drive), "/dev/%s", checklist[i]); |
0 | 219 if ( CheckDrive(drive, &stbuf) > 0 ) { |
220 AddDrive(drive, &stbuf); | |
221 } | |
222 } | |
223 } | |
224 return(0); | |
225 } | |
226 | |
227 /* General ioctl() CD-ROM command function */ | |
228 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
229 { | |
230 int retval; | |
231 | |
232 retval = ioctl(id, command, arg); | |
233 if ( retval < 0 ) { | |
234 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
235 } | |
236 return(retval); | |
237 } | |
238 | |
239 static const char *SDL_SYS_CDName(int drive) | |
240 { | |
241 return(SDL_cdlist[drive]); | |
242 } | |
243 | |
244 static int SDL_SYS_CDOpen(int drive) | |
245 { | |
246 return(open(SDL_cdlist[drive], (O_RDONLY|O_EXCL|O_NONBLOCK), 0)); | |
247 } | |
248 | |
249 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
250 { | |
251 struct ioc_toc_header toc; | |
252 int i, okay; | |
253 struct ioc_read_toc_entry entry; | |
254 struct cd_toc_entry data; | |
255 | |
256 okay = 0; | |
257 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCHEADER, &toc) == 0 ) { | |
258 cdrom->numtracks = toc.ending_track-toc.starting_track+1; | |
259 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
260 cdrom->numtracks = SDL_MAX_TRACKS; | |
261 } | |
262 /* Read all the track TOC entries */ | |
263 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
264 if ( i == cdrom->numtracks ) { | |
265 cdrom->track[i].id = 0xAA; /* CDROM_LEADOUT */ | |
266 } else { | |
267 cdrom->track[i].id = toc.starting_track+i; | |
268 } | |
269 entry.starting_track = cdrom->track[i].id; | |
270 entry.address_format = CD_MSF_FORMAT; | |
271 entry.data_len = sizeof(data); | |
272 entry.data = &data; | |
273 if ( SDL_SYS_CDioctl(cdrom->id, CDIOREADTOCENTRYS, | |
274 &entry) < 0 ) { | |
275 break; | |
276 } else { | |
277 cdrom->track[i].type = data.control; | |
278 cdrom->track[i].offset = MSF_TO_FRAMES( | |
279 data.addr.msf.minute, | |
280 data.addr.msf.second, | |
281 data.addr.msf.frame); | |
282 cdrom->track[i].length = 0; | |
283 if ( i > 0 ) { | |
284 cdrom->track[i-1].length = | |
285 cdrom->track[i].offset- | |
286 cdrom->track[i-1].offset; | |
287 } | |
288 } | |
289 } | |
290 if ( i == (cdrom->numtracks+1) ) { | |
291 okay = 1; | |
292 } | |
293 } | |
294 return(okay ? 0 : -1); | |
295 } | |
296 | |
297 /* Get CD-ROM status */ | |
298 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
299 { | |
300 CDstatus status; | |
301 struct ioc_toc_header toc; | |
302 struct ioc_read_subchannel info; | |
303 struct cd_sub_channel_info data; | |
304 | |
305 info.address_format = CD_MSF_FORMAT; | |
306 info.data_format = CD_CURRENT_POSITION; | |
307 info.track = 0; | |
308 info.data_len = sizeof(data); | |
309 info.data = &data; | |
310 if ( ioctl(cdrom->id, CDIOCREADSUBCHANNEL, &info) < 0 ) { | |
311 if ( ERRNO_TRAYEMPTY(errno) ) { | |
312 status = CD_TRAYEMPTY; | |
313 } else { | |
314 status = CD_ERROR; | |
315 } | |
316 } else { | |
317 switch (data.header.audio_status) { | |
318 case CD_AS_AUDIO_INVALID: | |
319 case CD_AS_NO_STATUS: | |
320 /* Try to determine if there's a CD available */ | |
321 if (ioctl(cdrom->id,CDIOREADTOCHEADER,&toc)==0) | |
322 status = CD_STOPPED; | |
323 else | |
324 status = CD_TRAYEMPTY; | |
325 break; | |
326 case CD_AS_PLAY_COMPLETED: | |
327 status = CD_STOPPED; | |
328 break; | |
329 case CD_AS_PLAY_IN_PROGRESS: | |
330 status = CD_PLAYING; | |
331 break; | |
332 case CD_AS_PLAY_PAUSED: | |
333 status = CD_PAUSED; | |
334 break; | |
335 default: | |
336 status = CD_ERROR; | |
337 break; | |
338 } | |
339 } | |
340 if ( position ) { | |
341 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
342 *position = MSF_TO_FRAMES( | |
343 data.what.position.absaddr.msf.minute, | |
344 data.what.position.absaddr.msf.second, | |
345 data.what.position.absaddr.msf.frame); | |
346 } else { | |
347 *position = 0; | |
348 } | |
349 } | |
350 return(status); | |
351 } | |
352 | |
353 /* Start play */ | |
354 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
355 { | |
356 struct ioc_play_msf playtime; | |
357 | |
358 FRAMES_TO_MSF(start, | |
359 &playtime.start_m, &playtime.start_s, &playtime.start_f); | |
360 FRAMES_TO_MSF(start+length, | |
361 &playtime.end_m, &playtime.end_s, &playtime.end_f); | |
362 #ifdef DEBUG_CDROM | |
363 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
364 playtime.start_m, playtime.start_s, playtime.start_f, | |
365 playtime.end_m, playtime.end_s, playtime.end_f); | |
366 #endif | |
367 ioctl(cdrom->id, CDIOCSTART, 0); | |
368 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPLAYMSF, &playtime)); | |
369 } | |
370 | |
371 /* Pause play */ | |
372 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
373 { | |
374 return(SDL_SYS_CDioctl(cdrom->id, CDIOCPAUSE, 0)); | |
375 } | |
376 | |
377 /* Resume play */ | |
378 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
379 { | |
380 return(SDL_SYS_CDioctl(cdrom->id, CDIOCRESUME, 0)); | |
381 } | |
382 | |
383 /* Stop play */ | |
384 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
385 { | |
386 return(SDL_SYS_CDioctl(cdrom->id, CDIOCSTOP, 0)); | |
387 } | |
388 | |
389 /* Eject the CD-ROM */ | |
390 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
391 { | |
392 return(SDL_SYS_CDioctl(cdrom->id, CDIOCEJECT, 0)); | |
393 } | |
394 | |
395 /* Close the CD-ROM handle */ | |
396 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
397 { | |
398 close(cdrom->id); | |
399 } | |
400 | |
401 void SDL_SYS_CDQuit(void) | |
402 { | |
403 int i; | |
404 | |
405 if ( SDL_numcds > 0 ) { | |
406 for ( i=0; i<SDL_numcds; ++i ) { | |
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407 SDL_free(SDL_cdlist[i]); |
0 | 408 } |
409 SDL_numcds = 0; | |
410 } | |
411 } | |
412 |