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_BEOS |
25 | |
26 | /* Functions for system-level CD-ROM audio control on BeOS |
27 | (not completely implemented yet) |
28 | */ |
29 | |
30 | #include <sys/types.h> |
31 | #include <sys/stat.h> |
32 | #include <unistd.h> |
33 | |
34 | #include <scsi.h> |
35 | #include <Directory.h> |
36 | #include <Entry.h> |
37 | #include <Path.h> |
38 | |
39 | #include "SDL_cdrom.h" |
40 | extern "C" { |
41 | #include "../SDL_syscdrom.h" |
42 | } |
43 | |
44 | /* Constants to help us get at the SCSI table-of-contents info */ |
45 | #define CD_NUMTRACKS(toc) toc.toc_data[3] |
46 | #define CD_TRACK(toc, track) (&toc.toc_data[6+(track)*8]) |
47 | #define CD_TRACK_N(toc, track) CD_TRACK(toc, track)[0] |
48 | #define CD_TRACK_M(toc, track) CD_TRACK(toc, track)[3] |
49 | #define CD_TRACK_S(toc, track) CD_TRACK(toc, track)[4] |
50 | #define CD_TRACK_F(toc, track) CD_TRACK(toc, track)[5] |
51 | |
52 | /* Constants to help us get at the SCSI position info */ |
53 | #define POS_TRACK(pos) pos.position[6] |
54 | #define POS_ABS_M(pos) pos.position[9] |
55 | #define POS_ABS_S(pos) pos.position[10] |
56 | #define POS_ABS_F(pos) pos.position[11] |
57 | #define POS_REL_M(pos) pos.position[13] |
58 | #define POS_REL_S(pos) pos.position[14] |
59 | #define POS_REL_F(pos) pos.position[15] |
60 | |
61 | /* The maximum number of CD-ROM drives we'll detect */ |
62 | #define MAX_DRIVES 16 |
63 | |
64 | /* A list of available CD-ROM drives */ |
65 | static char *SDL_cdlist[MAX_DRIVES]; |
66 | |
67 | /* The system-dependent CD control functions */ |
68 | static const char *SDL_SYS_CDName(int drive); |
69 | static int SDL_SYS_CDOpen(int drive); |
70 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); |
71 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); |
72 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); |
73 | static int SDL_SYS_CDPause(SDL_CD *cdrom); |
74 | static int SDL_SYS_CDResume(SDL_CD *cdrom); |
75 | static int SDL_SYS_CDStop(SDL_CD *cdrom); |
76 | static int SDL_SYS_CDEject(SDL_CD *cdrom); |
77 | static void SDL_SYS_CDClose(SDL_CD *cdrom); |
78 | int try_dir(const char *directory); |
79 | |
80 | |
81 | /* Check a drive to see if it is a CD-ROM */ |
82 | static int CheckDrive(char *drive) |
83 | { |
84 | struct stat stbuf; |
85 | int is_cd, cdfd; |
86 | device_geometry info; |
87 | |
88 | /* If it doesn't exist, return -1 */ |
89 | if ( stat(drive, &stbuf) < 0 ) { |
90 | return(-1); |
91 | } |
92 | |
93 | /* If it does exist, verify that it's an available CD-ROM */ |
94 | is_cd = 0; |
95 | cdfd = open(drive, 0); |
96 | if ( cdfd >= 0 ) { |
97 | if ( ioctl(cdfd, B_GET_GEOMETRY, &info) == B_NO_ERROR ) { |
98 | if ( info.device_type == B_CD ) { |
99 | is_cd = 1; |
100 | } |
101 | } |
102 | close(cdfd); |
103 | } else { |
104 | /* This can happen when the drive is open .. (?) */; |
105 | is_cd = 1; |
106 | } |
107 | return(is_cd); |
108 | } |
109 | |
110 | /* Add a CD-ROM drive to our list of valid drives */ |
111 | static void AddDrive(char *drive) |
112 | { |
113 | int i; |
114 | size_t len; |
115 | |
116 | if ( SDL_numcds < MAX_DRIVES ) { |
117 | /* Add this drive to our list */ |
118 | i = SDL_numcds; |
119 | len = SDL_strlen(drive)+1; |
120 | SDL_cdlist[i] = (char *)SDL_malloc(len); |
121 | if ( SDL_cdlist[i] == NULL ) { |
122 | SDL_OutOfMemory(); |
123 | return; |
124 | } |
125 | SDL_strlcpy(SDL_cdlist[i], drive, len); |
126 | ++SDL_numcds; |
127 | #ifdef CDROM_DEBUG |
128 | fprintf(stderr, "Added CD-ROM drive: %s\n", drive); |
129 | #endif |
130 | } |
131 | } |
132 | |
133 | /* IDE bus scanning magic */ |
134 | enum { |
135 | IDE_GET_DEVICES_INFO = B_DEVICE_OP_CODES_END + 50, |
136 | }; |
137 | struct ide_ctrl_info { |
138 | bool ide_0_present; |
139 | bool ide_0_master_present; |
140 | bool ide_0_slave_present; |
141 | int ide_0_master_type; |
142 | int ide_0_slave_type; |
143 | bool ide_1_present; |
144 | bool ide_1_master_present; |
145 | bool ide_1_slave_present; |
146 | int ide_1_master_type; |
147 | int ide_1_slave_type; |
148 | }; |
149 | |
150 | int SDL_SYS_CDInit(void) |
151 | { |
152 | char *SDLcdrom; |
153 | int raw_fd; |
154 | struct ide_ctrl_info info; |
155 | |
156 | /* Fill in our driver capabilities */ |
157 | SDL_CDcaps.Name = SDL_SYS_CDName; |
158 | SDL_CDcaps.Open = SDL_SYS_CDOpen; |
159 | SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; |
160 | SDL_CDcaps.Status = SDL_SYS_CDStatus; |
161 | SDL_CDcaps.Play = SDL_SYS_CDPlay; |
162 | SDL_CDcaps.Pause = SDL_SYS_CDPause; |
163 | SDL_CDcaps.Resume = SDL_SYS_CDResume; |
164 | SDL_CDcaps.Stop = SDL_SYS_CDStop; |
165 | SDL_CDcaps.Eject = SDL_SYS_CDEject; |
166 | SDL_CDcaps.Close = SDL_SYS_CDClose; |
167 | |
168 | /* Look in the environment for our CD-ROM drive list */ |
169 | SDLcdrom = SDL_getenv("SDL_CDROM"); /* ':' separated list of devices */ |
170 | if ( SDLcdrom != NULL ) { |
171 | char *cdpath, *delim; |
172 | size_t len = SDL_strlen(SDLcdrom)+1; |
173 | cdpath = SDL_stack_alloc(char, len); |
174 | if ( cdpath != NULL ) { |
175 | SDL_strlcpy(cdpath, SDLcdrom, len); |
176 | SDLcdrom = cdpath; |
177 | do { |
178 | delim = SDL_strchr(SDLcdrom, ':'); |
179 | if ( delim ) { |
180 | *delim++ = '\0'; |
181 | } |
182 | if ( CheckDrive(SDLcdrom) > 0 ) { |
183 | AddDrive(SDLcdrom); |
184 | } |
185 | if ( delim ) { |
186 | SDLcdrom = delim; |
187 | } else { |
188 | SDLcdrom = NULL; |
189 | } |
190 | } while ( SDLcdrom ); |
191 | SDL_stack_free(cdpath); |
192 | } |
193 | |
194 | /* If we found our drives, there's nothing left to do */ |
195 | if ( SDL_numcds > 0 ) { |
196 | return(0); |
197 | } |
198 | } |
199 | |
200 | /* Scan the system for CD-ROM drives */ |
201 | try_dir("/dev/disk"); |
202 | return 0; |
203 | } |
204 | |
205 | |
206 | int try_dir(const char *directory) |
207 | { |
208 | BDirectory dir; |
209 | dir.SetTo(directory); |
210 | if(dir.InitCheck() != B_NO_ERROR) { |
211 | return false; |
212 | } |
213 | dir.Rewind(); |
214 | BEntry entry; |
215 | while(dir.GetNextEntry(&entry) >= 0) { |
216 | BPath path; |
217 | const char *name; |
218 | entry_ref e; |
219 | |
220 | if(entry.GetPath(&path) != B_NO_ERROR) |
221 | continue; |
222 | name = path.Path(); |
223 | |
224 | if(entry.GetRef(&e) != B_NO_ERROR) |
225 | continue; |
226 | |
227 | if(entry.IsDirectory()) { |
228 | if(SDL_strcmp(e.name, "floppy") == 0) |
229 | continue; /* ignore floppy (it is not silent) */ |
230 | int devfd = try_dir(name); |
231 | if(devfd >= 0) |
232 | return devfd; |
233 | } |
234 | else { |
235 | int devfd; |
236 | device_geometry g; |
237 | |
238 | if(SDL_strcmp(e.name, "raw") != 0) |
239 | continue; /* ignore partitions */ |
240 | |
241 | devfd = open(name, O_RDONLY); |
242 | if(devfd < 0) |
243 | continue; |
244 | |
245 | if(ioctl(devfd, B_GET_GEOMETRY, &g, sizeof(g)) >= 0) { |
246 | if(g.device_type == B_CD) |
247 | { |
248 | AddDrive(strdup(name)); |
249 | } |
250 | } |
251 | close(devfd); |
252 | } |
253 | } |
254 | return B_ERROR; |
255 | } |
256 | |
257 | |
258 | /* General ioctl() CD-ROM command function */ |
259 | static int SDL_SYS_CDioctl(int index, int command, void *arg) |
260 | { |
261 | int okay; |
262 | int fd; |
263 | |
264 | okay = 0; |
265 | fd = open(SDL_cdlist[index], 0); |
266 | if ( fd >= 0 ) { |
267 | if ( ioctl(fd, command, arg) == B_NO_ERROR ) { |
268 | okay = 1; |
269 | } |
270 | close(fd); |
271 | } |
272 | return(okay ? 0 : -1); |
273 | } |
274 | |
275 | static const char *SDL_SYS_CDName(int drive) |
276 | { |
277 | return(SDL_cdlist[drive]); |
278 | } |
279 | |
280 | static int SDL_SYS_CDOpen(int drive) |
281 | { |
282 | return(drive); |
283 | } |
284 | |
285 | static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) |
286 | { |
287 | int i; |
288 | scsi_toc toc; |
289 | |
290 | if ( SDL_SYS_CDioctl(cdrom->id, B_SCSI_GET_TOC, &toc) == 0 ) { |
291 | cdrom->numtracks = CD_NUMTRACKS(toc); |
292 | if ( cdrom->numtracks > SDL_MAX_TRACKS ) { |
293 | cdrom->numtracks = SDL_MAX_TRACKS; |
294 | } |
295 | for ( i=0; i<=cdrom->numtracks; ++i ) { |
296 | cdrom->track[i].id = CD_TRACK_N(toc, i); |
297 | /* FIXME: How do we tell on BeOS? */ |
298 | cdrom->track[i].type = SDL_AUDIO_TRACK; |
299 | cdrom->track[i].offset = MSF_TO_FRAMES( |
300 | CD_TRACK_M(toc, i), |
301 | CD_TRACK_S(toc, i), |
302 | CD_TRACK_F(toc, i)); |
303 | cdrom->track[i].length = 0; |
304 | if ( i > 0 ) { |
305 | cdrom->track[i-1].length = |
306 | cdrom->track[i].offset- |
307 | cdrom->track[i-1].offset; |
308 | } |
309 | } |
310 | return(0); |
311 | } else { |
312 | return(-1); |
313 | } |
314 | } |
315 | |
316 | /* Get CD-ROM status */ |
317 | static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) |
318 | { |
319 | CDstatus status; |
320 | int fd; |
321 | int cur_frame; |
322 | scsi_position pos; |
323 | |
324 | fd = open(SDL_cdlist[cdrom->id], 0); |
325 | cur_frame = 0; |
326 | if ( fd >= 0 ) { |
327 | if ( ioctl(fd, B_SCSI_GET_POSITION, &pos) == B_NO_ERROR ) { |
328 | cur_frame = MSF_TO_FRAMES( |
329 | POS_ABS_M(pos), POS_ABS_S(pos), POS_ABS_F(pos)); |
330 | } |
331 | if ( ! pos.position[1] || (pos.position[1] >= 0x13) || |
332 | ((pos.position[1] == 0x12) && (!pos.position[6])) ) { |
333 | status = CD_STOPPED; |
334 | } else |
335 | if ( pos.position[1] == 0x11 ) { |
336 | status = CD_PLAYING; |
337 | } else { |
338 | status = CD_PAUSED; |
339 | } |
340 | close(fd); |
341 | } else { |
342 | status = CD_TRAYEMPTY; |
343 | } |
344 | if ( position ) { |
345 | *position = cur_frame; |
346 | } |
347 | return(status); |
348 | } |
349 | |
350 | /* Start play */ |
351 | static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) |
352 | { |
353 | int okay; |
354 | int fd; |
355 | scsi_play_position pos; |
356 | |
357 | okay = 0; |
358 | fd = open(SDL_cdlist[cdrom->id], 0); |
359 | if ( fd >= 0 ) { |
360 | FRAMES_TO_MSF(start, &pos.start_m, &pos.start_s, &pos.start_f); |
361 | FRAMES_TO_MSF(start+length, &pos.end_m, &pos.end_s, &pos.end_f); |
362 | if ( ioctl(fd, B_SCSI_PLAY_POSITION, &pos) == B_NO_ERROR ) { |
363 | okay = 1; |
364 | } |
365 | close(fd); |
366 | } |
367 | return(okay ? 0 : -1); |
368 | } |
369 | |
370 | /* Pause play */ |
371 | static int SDL_SYS_CDPause(SDL_CD *cdrom) |
372 | { |
373 | return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_PAUSE_AUDIO, 0)); |
374 | } |
375 | |
376 | /* Resume play */ |
377 | static int SDL_SYS_CDResume(SDL_CD *cdrom) |
378 | { |
379 | return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_RESUME_AUDIO, 0)); |
380 | } |
381 | |
382 | /* Stop play */ |
383 | static int SDL_SYS_CDStop(SDL_CD *cdrom) |
384 | { |
385 | return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_STOP_AUDIO, 0)); |
386 | } |
387 | |
388 | /* Eject the CD-ROM */ |
389 | static int SDL_SYS_CDEject(SDL_CD *cdrom) |
390 | { |
391 | return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_EJECT, 0)); |
392 | } |
393 | |
394 | /* Close the CD-ROM handle */ |
395 | static void SDL_SYS_CDClose(SDL_CD *cdrom) |
396 | { |
397 | close(cdrom->id); |
398 | } |
399 | |
400 | void SDL_SYS_CDQuit(void) |
401 | { |
402 | int i; |
403 | |
404 | if ( SDL_numcds > 0 ) { |
405 | for ( i=0; i<SDL_numcds; ++i ) { |
406 | SDL_free(SDL_cdlist[i]); |
407 | } |
408 | SDL_numcds = 0; |
409 | } |
410 | } |
411 | |
412 | #endif /* SDL_CDROM_BEOS */ |