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comparison src/cdrom/beos/SDL_syscdrom.c @ 0:74212992fb08

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Initial revision
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:45:43 +0000
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1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 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 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@devolution.com
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /* Functions for system-level CD-ROM audio control on BeOS
29 (not completely implemented yet)
30 */
31
32 #include <sys/types.h>
33 #include <stdlib.h>
34 #include <sys/stat.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #include <scsi.h>
40
41 #include "SDL_error.h"
42 #include "SDL_cdrom.h"
43 #include "SDL_syscdrom.h"
44
45 /* Constants to help us get at the SCSI table-of-contents info */
46 #define CD_NUMTRACKS(toc) toc.toc_data[3]
47 #define CD_TRACK(toc, track) (&toc.toc_data[6+(track)*8])
48 #define CD_TRACK_N(toc, track) CD_TRACK(toc, track)[0]
49 #define CD_TRACK_M(toc, track) CD_TRACK(toc, track)[3]
50 #define CD_TRACK_S(toc, track) CD_TRACK(toc, track)[4]
51 #define CD_TRACK_F(toc, track) CD_TRACK(toc, track)[5]
52
53 /* Constants to help us get at the SCSI position info */
54 #define POS_TRACK(pos) pos.position[6]
55 #define POS_ABS_M(pos) pos.position[9]
56 #define POS_ABS_S(pos) pos.position[10]
57 #define POS_ABS_F(pos) pos.position[11]
58 #define POS_REL_M(pos) pos.position[13]
59 #define POS_REL_S(pos) pos.position[14]
60 #define POS_REL_F(pos) pos.position[15]
61
62 /* The maximum number of CD-ROM drives we'll detect */
63 #define MAX_DRIVES 16
64
65 /* A list of available CD-ROM drives */
66 static char *SDL_cdlist[MAX_DRIVES];
67
68 /* The system-dependent CD control functions */
69 static const char *SDL_SYS_CDName(int drive);
70 static int SDL_SYS_CDOpen(int drive);
71 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
72 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
73 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
74 static int SDL_SYS_CDPause(SDL_CD *cdrom);
75 static int SDL_SYS_CDResume(SDL_CD *cdrom);
76 static int SDL_SYS_CDStop(SDL_CD *cdrom);
77 static int SDL_SYS_CDEject(SDL_CD *cdrom);
78 static void SDL_SYS_CDClose(SDL_CD *cdrom);
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
115 if ( SDL_numcds < MAX_DRIVES ) {
116 /* Add this drive to our list */
117 i = SDL_numcds;
118 SDL_cdlist[i] = (char *)malloc(strlen(drive)+1);
119 if ( SDL_cdlist[i] == NULL ) {
120 SDL_OutOfMemory();
121 return;
122 }
123 strcpy(SDL_cdlist[i], drive);
124 ++SDL_numcds;
125 #ifdef CDROM_DEBUG
126 fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
127 #endif
128 }
129 }
130
131 # if 0 /* Save this for later, when I can test it */
132 /* SCSI bus scanning magic */
133 static int CheckSCSI(int path, int id, int lun)
134 {
135 int is_cd;
136 int fd;
137 scsiprobe_inquiry inquiry;
138
139 is_cd = 0;
140 fd = open("/dev/scsiprobe", 0);
141 if ( fd >= 0 ) {
142 inquiry.path = path;
143 inquiry.id = id;
144 inquiry.lun = lun;
145 inquiry.len = sizeof(inquiry);
146 if ( ioctl(fd, B_SCSIPROBE_INQUIRY, &inquiry) == B_NO_ERROR ) {
147 if ( (inquiry.data[0]&0x1F) == B_SCSI_CD ) {
148 is_cd = 1;
149 }
150 }
151 close(fd);
152 }
153 return(is_cd);
154 }
155 #endif
156
157 /* IDE bus scanning magic */
158 enum {
159 IDE_GET_DEVICES_INFO = B_DEVICE_OP_CODES_END + 50,
160 };
161 struct ide_ctrl_info {
162 bool ide_0_present;
163 bool ide_0_master_present;
164 bool ide_0_slave_present;
165 int ide_0_master_type;
166 int ide_0_slave_type;
167 bool ide_1_present;
168 bool ide_1_master_present;
169 bool ide_1_slave_present;
170 int ide_1_master_type;
171 int ide_1_slave_type;
172 };
173
174 int SDL_SYS_CDInit(void)
175 {
176 char *SDLcdrom;
177 int raw_fd;
178 struct ide_ctrl_info info;
179
180 /* Fill in our driver capabilities */
181 SDL_CDcaps.Name = SDL_SYS_CDName;
182 SDL_CDcaps.Open = SDL_SYS_CDOpen;
183 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
184 SDL_CDcaps.Status = SDL_SYS_CDStatus;
185 SDL_CDcaps.Play = SDL_SYS_CDPlay;
186 SDL_CDcaps.Pause = SDL_SYS_CDPause;
187 SDL_CDcaps.Resume = SDL_SYS_CDResume;
188 SDL_CDcaps.Stop = SDL_SYS_CDStop;
189 SDL_CDcaps.Eject = SDL_SYS_CDEject;
190 SDL_CDcaps.Close = SDL_SYS_CDClose;
191
192 /* Look in the environment for our CD-ROM drive list */
193 SDLcdrom = getenv("SDL_CDROM"); /* ':' separated list of devices */
194 if ( SDLcdrom != NULL ) {
195 char *cdpath, *delim;
196 cdpath = malloc(strlen(SDLcdrom)+1);
197 if ( cdpath != NULL ) {
198 strcpy(cdpath, SDLcdrom);
199 SDLcdrom = cdpath;
200 do {
201 delim = strchr(SDLcdrom, ':');
202 if ( delim ) {
203 *delim++ = '\0';
204 }
205 if ( CheckDrive(SDLcdrom) > 0 ) {
206 AddDrive(SDLcdrom);
207 }
208 if ( delim ) {
209 SDLcdrom = delim;
210 } else {
211 SDLcdrom = NULL;
212 }
213 } while ( SDLcdrom );
214 free(cdpath);
215 }
216
217 /* If we found our drives, there's nothing left to do */
218 if ( SDL_numcds > 0 ) {
219 return(0);
220 }
221 }
222
223 /* Scan the system for CD-ROM drives */
224 raw_fd = open("/dev/disk/ide/rescan", 0);
225 if ( raw_fd >= 0 ) {
226 if (ioctl(raw_fd, IDE_GET_DEVICES_INFO, &info) == B_NO_ERROR) {
227 if ( info.ide_0_master_type == B_CD ) {
228 AddDrive("/dev/disk/ide/0/master/raw");
229 }
230 if ( info.ide_0_slave_type == B_CD ) {
231 AddDrive("/dev/disk/ide/0/slave/raw");
232 }
233 if ( info.ide_1_master_type == B_CD ) {
234 AddDrive("/dev/disk/ide/1/master/raw");
235 }
236 if ( info.ide_1_slave_type == B_CD ) {
237 AddDrive("/dev/disk/ide/1/slave/raw");
238 }
239 }
240 close(raw_fd);
241 }
242 return(0);
243 }
244
245 /* General ioctl() CD-ROM command function */
246 static int SDL_SYS_CDioctl(int index, int command, void *arg)
247 {
248 int okay;
249 int fd;
250
251 okay = 0;
252 fd = open(SDL_cdlist[index], 0);
253 if ( fd >= 0 ) {
254 if ( ioctl(fd, command, arg) == B_NO_ERROR ) {
255 okay = 1;
256 }
257 close(fd);
258 }
259 return(okay ? 0 : -1);
260 }
261
262 static const char *SDL_SYS_CDName(int drive)
263 {
264 return(SDL_cdlist[drive]);
265 }
266
267 static int SDL_SYS_CDOpen(int drive)
268 {
269 return(drive);
270 }
271
272 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
273 {
274 int i;
275 scsi_toc toc;
276
277 if ( SDL_SYS_CDioctl(cdrom->id, B_SCSI_GET_TOC, &toc) == 0 ) {
278 cdrom->numtracks = CD_NUMTRACKS(toc);
279 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
280 cdrom->numtracks = SDL_MAX_TRACKS;
281 }
282 for ( i=0; i<=cdrom->numtracks; ++i ) {
283 cdrom->track[i].id = CD_TRACK_N(toc, i);
284 /* FIXME: How do we tell on BeOS? */
285 cdrom->track[i].type = SDL_AUDIO_TRACK;
286 cdrom->track[i].offset = MSF_TO_FRAMES(
287 CD_TRACK_M(toc, i),
288 CD_TRACK_S(toc, i),
289 CD_TRACK_F(toc, i));
290 cdrom->track[i].length = 0;
291 if ( i > 0 ) {
292 cdrom->track[i-1].length =
293 cdrom->track[i].offset-
294 cdrom->track[i-1].offset;
295 }
296 }
297 return(0);
298 } else {
299 return(-1);
300 }
301 }
302
303 /* Get CD-ROM status */
304 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
305 {
306 CDstatus status;
307 int fd;
308 int cur_frame;
309 scsi_position pos;
310
311 fd = open(SDL_cdlist[cdrom->id], 0);
312 cur_frame = 0;
313 if ( fd >= 0 ) {
314 if ( ioctl(fd, B_SCSI_GET_POSITION, &pos) == B_NO_ERROR ) {
315 cur_frame = MSF_TO_FRAMES(
316 POS_ABS_M(pos), POS_ABS_S(pos), POS_ABS_F(pos));
317 }
318 if ( ! pos.position[1] || (pos.position[1] >= 0x13) ||
319 ((pos.position[1] == 0x12) && (!pos.position[6])) ) {
320 status = CD_STOPPED;
321 } else
322 if ( pos.position[1] == 0x11 ) {
323 status = CD_PLAYING;
324 } else {
325 status = CD_PAUSED;
326 }
327 close(fd);
328 } else {
329 status = CD_TRAYEMPTY;
330 }
331 if ( position ) {
332 *position = cur_frame;
333 }
334 return(status);
335 }
336
337 /* Start play */
338 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
339 {
340 int okay;
341 int fd;
342 scsi_play_position pos;
343
344 okay = 0;
345 fd = open(SDL_cdlist[cdrom->id], 0);
346 if ( fd >= 0 ) {
347 FRAMES_TO_MSF(start, &pos.start_m, &pos.start_s, &pos.start_f);
348 FRAMES_TO_MSF(start+length, &pos.end_m, &pos.end_s, &pos.end_f);
349 if ( ioctl(fd, B_SCSI_PLAY_POSITION, &pos) == B_NO_ERROR ) {
350 okay = 1;
351 }
352 close(fd);
353 }
354 return(okay ? 0 : -1);
355 }
356
357 /* Pause play */
358 static int SDL_SYS_CDPause(SDL_CD *cdrom)
359 {
360 return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_PAUSE_AUDIO, 0));
361 }
362
363 /* Resume play */
364 static int SDL_SYS_CDResume(SDL_CD *cdrom)
365 {
366 return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_RESUME_AUDIO, 0));
367 }
368
369 /* Stop play */
370 static int SDL_SYS_CDStop(SDL_CD *cdrom)
371 {
372 return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_STOP_AUDIO, 0));
373 }
374
375 /* Eject the CD-ROM */
376 static int SDL_SYS_CDEject(SDL_CD *cdrom)
377 {
378 return(SDL_SYS_CDioctl(cdrom->id, B_SCSI_EJECT, 0));
379 }
380
381 /* Close the CD-ROM handle */
382 static void SDL_SYS_CDClose(SDL_CD *cdrom)
383 {
384 free(cdrom);
385 }
386
387 void SDL_SYS_CDQuit(void)
388 {
389 int i;
390
391 if ( SDL_numcds > 0 ) {
392 for ( i=0; i<SDL_numcds; ++i ) {
393 free(SDL_cdlist[i]);
394 }
395 SDL_numcds = 0;
396 }
397 }
398