1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2004 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@libsdl.org
21 */
22 #include "SDL_config.h"
23
24 #ifdef SDL_CDROM_MINT
25
26 /*
27 Atari MetaDOS CD-ROM functions
28
29 Patrice Mandin
30 */
31
32 #include <errno.h>
33
34 #include <cdromio.h>
35 #include <metados.h>
36
37 #include "SDL_cdrom.h"
38 #include "../SDL_syscdrom.h"
39
40 /* Some ioctl() errno values which occur when the tray is empty */
41 #ifndef ENOMEDIUM
42 #define ENOMEDIUM ENOENT
43 #endif
44 #define ERRNO_TRAYEMPTY(errno) \
45 ((errno == EIO) || (errno == ENOENT) || \
46 (errno == EINVAL) || (errno == ENOMEDIUM))
47
48 /* The maximum number of CD-ROM drives we'll detect */
49 #define MAX_DRIVES 32
50
51 typedef struct {
52 unsigned char device[3]; /* Physical device letter + ':' + '\0' */
53 metaopen_t metaopen; /* Infos on opened drive */
54 } metados_drive_t;
55
56 static metados_drive_t metados_drives[MAX_DRIVES];
57
58 /* The system-dependent CD control functions */
59 static const char *SDL_SYS_CDName(int drive);
60 static int SDL_SYS_CDOpen(int drive);
61 static void SDL_SYS_CDClose(SDL_CD *cdrom);
62 static int SDL_SYS_CDioctl(int id, int command, void *arg);
63 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
64 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
65 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
66 static int SDL_SYS_CDPause(SDL_CD *cdrom);
67 static int SDL_SYS_CDResume(SDL_CD *cdrom);
68 static int SDL_SYS_CDStop(SDL_CD *cdrom);
69 static int SDL_SYS_CDEject(SDL_CD *cdrom);
70
SDL_SYS_CDInit(void)71 int SDL_SYS_CDInit(void)
72 {
73 metainit_t metainit={0,0,0,0};
74 metaopen_t metaopen;
75 int i, handle;
76 struct cdrom_subchnl info;
77
78 Metainit(&metainit);
79 if (metainit.version == NULL) {
80 #ifdef DEBUG_CDROM
81 fprintf(stderr, "MetaDOS not installed\n");
82 #endif
83 return -1;
84 }
85
86 if (metainit.drives_map == 0) {
87 #ifdef DEBUG_CDROM
88 fprintf(stderr, "No MetaDOS devices present\n");
89 #endif
90 return -1;
91 }
92
93 SDL_numcds = 0;
94
95 for (i='A'; i<='Z'; i++) {
96 metados_drives[SDL_numcds].device[0] = 0;
97 metados_drives[SDL_numcds].device[1] = ':';
98 metados_drives[SDL_numcds].device[2] = 0;
99
100 if (metainit.drives_map & (1<<(i-'A'))) {
101 handle = Metaopen(i, &metaopen);
102 if (handle == 0) {
103
104 info.cdsc_format = CDROM_MSF;
105 if ( (Metaioctl(i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0) || ERRNO_TRAYEMPTY(errno) ) {
106 metados_drives[SDL_numcds].device[0] = i;
107 ++SDL_numcds;
108 }
109
110 Metaclose(i);
111 }
112 }
113 }
114
115 /* Fill in our driver capabilities */
116 SDL_CDcaps.Name = SDL_SYS_CDName;
117 SDL_CDcaps.Open = SDL_SYS_CDOpen;
118 SDL_CDcaps.Close = SDL_SYS_CDClose;
119
120 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
121 SDL_CDcaps.Status = SDL_SYS_CDStatus;
122 SDL_CDcaps.Play = SDL_SYS_CDPlay;
123 SDL_CDcaps.Pause = SDL_SYS_CDPause;
124 SDL_CDcaps.Resume = SDL_SYS_CDResume;
125 SDL_CDcaps.Stop = SDL_SYS_CDStop;
126 SDL_CDcaps.Eject = SDL_SYS_CDEject;
127
128 return 0;
129 }
130
SDL_SYS_CDQuit(void)131 void SDL_SYS_CDQuit(void)
132 {
133 SDL_numcds = 0;
134 }
135
SDL_SYS_CDName(int drive)136 static const char *SDL_SYS_CDName(int drive)
137 {
138 return(metados_drives[drive].device);
139 }
140
SDL_SYS_CDOpen(int drive)141 static int SDL_SYS_CDOpen(int drive)
142 {
143 int handle;
144
145 handle = Metaopen(metados_drives[drive].device[0], &(metados_drives[drive].metaopen));
146 if (handle == 0) {
147 return drive;
148 }
149
150 return -1;
151 }
152
SDL_SYS_CDClose(SDL_CD * cdrom)153 static void SDL_SYS_CDClose(SDL_CD *cdrom)
154 {
155 Metaclose(metados_drives[cdrom->id].device[0]);
156 }
157
SDL_SYS_CDioctl(int id,int command,void * arg)158 static int SDL_SYS_CDioctl(int id, int command, void *arg)
159 {
160 int retval;
161
162 retval = Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command, arg);
163 if ( retval < 0 ) {
164 SDL_SetError("ioctl() error: %s", strerror(errno));
165 }
166 return(retval);
167 }
168
SDL_SYS_CDGetTOC(SDL_CD * cdrom)169 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
170 {
171 int i,okay;
172 struct cdrom_tochdr toc;
173 struct cdrom_tocentry entry;
174
175 /* Use standard ioctl() */
176 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)<0) {
177 return -1;
178 }
179
180 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1;
181 if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
182 cdrom->numtracks = SDL_MAX_TRACKS;
183 }
184
185 /* Read all the track TOC entries */
186 okay=1;
187 for ( i=0; i<=cdrom->numtracks; ++i ) {
188 if ( i == cdrom->numtracks ) {
189 cdrom->track[i].id = CDROM_LEADOUT;
190 } else {
191 cdrom->track[i].id = toc.cdth_trk0+i;
192 }
193 entry.cdte_track = cdrom->track[i].id;
194 entry.cdte_format = CDROM_MSF;
195 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, &entry) < 0 ) {
196 okay=0;
197 break;
198 } else {
199 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) {
200 cdrom->track[i].type = SDL_DATA_TRACK;
201 } else {
202 cdrom->track[i].type = SDL_AUDIO_TRACK;
203 }
204 cdrom->track[i].offset = MSF_TO_FRAMES(
205 entry.cdte_addr.msf.minute,
206 entry.cdte_addr.msf.second,
207 entry.cdte_addr.msf.frame);
208 cdrom->track[i].length = 0;
209 if ( i > 0 ) {
210 cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset;
211 }
212 }
213 }
214
215 return(okay ? 0 : -1);
216 }
217
218 /* Get CD-ROM status */
SDL_SYS_CDStatus(SDL_CD * cdrom,int * position)219 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
220 {
221 CDstatus status;
222 struct cdrom_tochdr toc;
223 struct cdrom_subchnl info;
224
225 info.cdsc_format = CDROM_MSF;
226 if ( SDL_SYS_CDioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) {
227 if ( ERRNO_TRAYEMPTY(errno) ) {
228 status = CD_TRAYEMPTY;
229 } else {
230 status = CD_ERROR;
231 }
232 } else {
233 switch (info.cdsc_audiostatus) {
234 case CDROM_AUDIO_INVALID:
235 case CDROM_AUDIO_NO_STATUS:
236 /* Try to determine if there's a CD available */
237 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) {
238 status = CD_STOPPED;
239 } else {
240 status = CD_TRAYEMPTY;
241 }
242 break;
243 case CDROM_AUDIO_COMPLETED:
244 status = CD_STOPPED;
245 break;
246 case CDROM_AUDIO_PLAY:
247 status = CD_PLAYING;
248 break;
249 case CDROM_AUDIO_PAUSED:
250 /* Workaround buggy CD-ROM drive */
251 if ( info.cdsc_trk == CDROM_LEADOUT ) {
252 status = CD_STOPPED;
253 } else {
254 status = CD_PAUSED;
255 }
256 break;
257 default:
258 status = CD_ERROR;
259 break;
260 }
261 }
262 if ( position ) {
263 if ( status == CD_PLAYING || (status == CD_PAUSED) ) {
264 *position = MSF_TO_FRAMES(
265 info.cdsc_absaddr.msf.minute,
266 info.cdsc_absaddr.msf.second,
267 info.cdsc_absaddr.msf.frame);
268 } else {
269 *position = 0;
270 }
271 }
272 return(status);
273 }
274
275 /* Start play */
SDL_SYS_CDPlay(SDL_CD * cdrom,int start,int length)276 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
277 {
278 struct cdrom_msf playtime;
279
280 FRAMES_TO_MSF(start,
281 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0);
282 FRAMES_TO_MSF(start+length,
283 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1);
284 #ifdef DEBUG_CDROM
285 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n",
286 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0,
287 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1);
288 #endif
289
290 return SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime);
291 }
292
293 /* Pause play */
SDL_SYS_CDPause(SDL_CD * cdrom)294 static int SDL_SYS_CDPause(SDL_CD *cdrom)
295 {
296 return SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0);
297 }
298
299 /* Resume play */
SDL_SYS_CDResume(SDL_CD * cdrom)300 static int SDL_SYS_CDResume(SDL_CD *cdrom)
301 {
302 return SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0);
303 }
304
305 /* Stop play */
SDL_SYS_CDStop(SDL_CD * cdrom)306 static int SDL_SYS_CDStop(SDL_CD *cdrom)
307 {
308 return SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0);
309 }
310
311 /* Eject the CD-ROM */
SDL_SYS_CDEject(SDL_CD * cdrom)312 static int SDL_SYS_CDEject(SDL_CD *cdrom)
313 {
314 return SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0);
315 }
316
317 #endif /* SDL_CDROM_MINT */
318