Mercurial > sdl-ios-xcode
annotate src/cdrom/mint/SDL_syscdrom.c @ 769:b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Sun, 04 Jan 2004 16:49:27 +0000 |
parents | cb1208fcd946 |
children | 604d73db6802 |
rev | line source |
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724 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
769
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3 Copyright (C) 1997-2004 Sam Lantinga |
724 | 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 | |
23 /* | |
24 Atari MetaDOS CD-ROM functions | |
25 | |
26 Patrice Mandin | |
27 */ | |
28 | |
29 #include <errno.h> | |
30 #include <stdio.h> | |
31 #include <stdlib.h> | |
32 #include <string.h> | |
33 | |
34 #include <cdromio.h> | |
35 #include <metados.h> | |
36 | |
37 #include "SDL_error.h" | |
38 #include "SDL_cdrom.h" | |
39 #include "SDL_syscdrom.h" | |
40 | |
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41 /* Some ioctl() errno values which occur when the tray is empty */ |
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42 #ifndef ENOMEDIUM |
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43 #define ENOMEDIUM ENOENT |
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44 #endif |
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45 #define ERRNO_TRAYEMPTY(errno) \ |
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46 ((errno == EIO) || (errno == ENOENT) || \ |
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47 (errno == EINVAL) || (errno == ENOMEDIUM)) |
724 | 48 |
49 /* The maximum number of CD-ROM drives we'll detect */ | |
50 #define MAX_DRIVES 32 | |
51 | |
52 typedef struct { | |
53 unsigned char device[3]; /* Physical device letter + ':' + '\0' */ | |
54 metaopen_t metaopen; /* Infos on opened drive */ | |
55 } metados_drive_t; | |
56 | |
57 static metados_drive_t metados_drives[MAX_DRIVES]; | |
58 | |
59 /* The system-dependent CD control functions */ | |
60 static const char *SDL_SYS_CDName(int drive); | |
61 static int SDL_SYS_CDOpen(int drive); | |
62 static void SDL_SYS_CDClose(SDL_CD *cdrom); | |
63 static int SDL_SYS_CDioctl(int id, int command, void *arg); | |
64 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom); | |
65 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position); | |
66 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length); | |
67 static int SDL_SYS_CDPause(SDL_CD *cdrom); | |
68 static int SDL_SYS_CDResume(SDL_CD *cdrom); | |
69 static int SDL_SYS_CDStop(SDL_CD *cdrom); | |
70 static int SDL_SYS_CDEject(SDL_CD *cdrom); | |
71 | |
72 int SDL_SYS_CDInit(void) | |
73 { | |
74 metainit_t metainit={0,0,0,0}; | |
75 metaopen_t metaopen; | |
76 int i, handle; | |
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77 struct cdrom_subchnl info; |
724 | 78 |
79 Metainit(&metainit); | |
80 if (metainit.version == NULL) { | |
81 #ifdef DEBUG_CDROM | |
82 fprintf(stderr, "MetaDOS not installed\n"); | |
83 #endif | |
84 return -1; | |
85 } | |
86 | |
87 if (metainit.drives_map == 0) { | |
88 #ifdef DEBUG_CDROM | |
89 fprintf(stderr, "No MetaDOS devices present\n"); | |
90 #endif | |
91 return -1; | |
92 } | |
93 | |
94 SDL_numcds = 0; | |
95 | |
96 for (i='A'; i<='Z'; i++) { | |
97 metados_drives[SDL_numcds].device[0] = 0; | |
98 metados_drives[SDL_numcds].device[1] = ':'; | |
99 metados_drives[SDL_numcds].device[2] = 0; | |
100 | |
101 if (metainit.drives_map & (1<<(i-'A'))) { | |
102 handle = Metaopen(i, &metaopen); | |
103 if (handle == 0) { | |
104 | |
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105 info.cdsc_format = CDROM_MSF; |
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106 if ( (Metaioctl(i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0) || ERRNO_TRAYEMPTY(errno) ) { |
724 | 107 metados_drives[SDL_numcds].device[0] = i; |
108 ++SDL_numcds; | |
109 } | |
110 | |
111 Metaclose(i); | |
112 } | |
113 } | |
114 } | |
115 | |
116 /* Fill in our driver capabilities */ | |
117 SDL_CDcaps.Name = SDL_SYS_CDName; | |
118 SDL_CDcaps.Open = SDL_SYS_CDOpen; | |
119 SDL_CDcaps.Close = SDL_SYS_CDClose; | |
120 | |
121 SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC; | |
122 SDL_CDcaps.Status = SDL_SYS_CDStatus; | |
123 SDL_CDcaps.Play = SDL_SYS_CDPlay; | |
124 SDL_CDcaps.Pause = SDL_SYS_CDPause; | |
125 SDL_CDcaps.Resume = SDL_SYS_CDResume; | |
126 SDL_CDcaps.Stop = SDL_SYS_CDStop; | |
127 SDL_CDcaps.Eject = SDL_SYS_CDEject; | |
128 | |
129 return 0; | |
130 } | |
131 | |
132 void SDL_SYS_CDQuit(void) | |
133 { | |
134 SDL_numcds = 0; | |
135 } | |
136 | |
137 static const char *SDL_SYS_CDName(int drive) | |
138 { | |
139 return(metados_drives[drive].device); | |
140 } | |
141 | |
142 static int SDL_SYS_CDOpen(int drive) | |
143 { | |
144 int handle; | |
145 | |
146 handle = Metaopen(metados_drives[drive].device[0], &(metados_drives[drive].metaopen)); | |
147 if (handle == 0) { | |
148 return drive; | |
149 } | |
150 | |
151 return -1; | |
152 } | |
153 | |
154 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
155 { | |
156 Metaclose(metados_drives[cdrom->id].device[0]); | |
157 } | |
158 | |
159 static int SDL_SYS_CDioctl(int id, int command, void *arg) | |
160 { | |
161 int retval; | |
162 | |
163 retval = Metaioctl(metados_drives[id].device[0], METADOS_IOCTL_MAGIC, command, arg); | |
164 if ( retval < 0 ) { | |
165 SDL_SetError("ioctl() error: %s", strerror(errno)); | |
166 } | |
167 return(retval); | |
168 } | |
169 | |
170 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom) | |
171 { | |
172 int i,okay; | |
173 struct cdrom_tochdr toc; | |
174 struct cdrom_tocentry entry; | |
175 | |
176 /* Use standard ioctl() */ | |
177 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)<0) { | |
178 return -1; | |
179 } | |
180 | |
181 cdrom->numtracks = toc.cdth_trk1-toc.cdth_trk0+1; | |
182 if ( cdrom->numtracks > SDL_MAX_TRACKS ) { | |
183 cdrom->numtracks = SDL_MAX_TRACKS; | |
184 } | |
185 | |
186 /* Read all the track TOC entries */ | |
187 okay=1; | |
188 for ( i=0; i<=cdrom->numtracks; ++i ) { | |
189 if ( i == cdrom->numtracks ) { | |
190 cdrom->track[i].id = CDROM_LEADOUT; | |
191 } else { | |
192 cdrom->track[i].id = toc.cdth_trk0+i; | |
193 } | |
194 entry.cdte_track = cdrom->track[i].id; | |
195 entry.cdte_format = CDROM_MSF; | |
196 if ( SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCENTRY, &entry) < 0 ) { | |
197 okay=0; | |
198 break; | |
199 } else { | |
200 if ( entry.cdte_ctrl & CDROM_DATA_TRACK ) { | |
201 cdrom->track[i].type = SDL_DATA_TRACK; | |
202 } else { | |
203 cdrom->track[i].type = SDL_AUDIO_TRACK; | |
204 } | |
205 cdrom->track[i].offset = MSF_TO_FRAMES( | |
206 entry.cdte_addr.msf.minute, | |
207 entry.cdte_addr.msf.second, | |
208 entry.cdte_addr.msf.frame); | |
209 cdrom->track[i].length = 0; | |
210 if ( i > 0 ) { | |
211 cdrom->track[i-1].length = cdrom->track[i].offset-cdrom->track[i-1].offset; | |
212 } | |
213 } | |
214 } | |
215 | |
216 return(okay ? 0 : -1); | |
217 } | |
218 | |
219 /* Get CD-ROM status */ | |
220 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position) | |
221 { | |
222 CDstatus status; | |
223 struct cdrom_tochdr toc; | |
224 struct cdrom_subchnl info; | |
225 | |
226 info.cdsc_format = CDROM_MSF; | |
227 if ( SDL_SYS_CDioctl(cdrom->id, CDROMSUBCHNL, &info) < 0 ) { | |
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228 if ( ERRNO_TRAYEMPTY(errno) ) { |
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229 status = CD_TRAYEMPTY; |
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230 } else { |
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231 status = CD_ERROR; |
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232 } |
724 | 233 } else { |
234 switch (info.cdsc_audiostatus) { | |
235 case CDROM_AUDIO_INVALID: | |
236 case CDROM_AUDIO_NO_STATUS: | |
237 /* Try to determine if there's a CD available */ | |
238 if (SDL_SYS_CDioctl(cdrom->id, CDROMREADTOCHDR, &toc)==0) { | |
239 status = CD_STOPPED; | |
240 } else { | |
241 status = CD_TRAYEMPTY; | |
242 } | |
243 break; | |
244 case CDROM_AUDIO_COMPLETED: | |
245 status = CD_STOPPED; | |
246 break; | |
247 case CDROM_AUDIO_PLAY: | |
248 status = CD_PLAYING; | |
249 break; | |
250 case CDROM_AUDIO_PAUSED: | |
251 /* Workaround buggy CD-ROM drive */ | |
252 if ( info.cdsc_trk == CDROM_LEADOUT ) { | |
253 status = CD_STOPPED; | |
254 } else { | |
255 status = CD_PAUSED; | |
256 } | |
257 break; | |
258 default: | |
259 status = CD_ERROR; | |
260 break; | |
261 } | |
262 } | |
263 if ( position ) { | |
264 if ( status == CD_PLAYING || (status == CD_PAUSED) ) { | |
265 *position = MSF_TO_FRAMES( | |
266 info.cdsc_absaddr.msf.minute, | |
267 info.cdsc_absaddr.msf.second, | |
268 info.cdsc_absaddr.msf.frame); | |
269 } else { | |
270 *position = 0; | |
271 } | |
272 } | |
273 return(status); | |
274 } | |
275 | |
276 /* Start play */ | |
277 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length) | |
278 { | |
279 struct cdrom_msf playtime; | |
280 | |
281 FRAMES_TO_MSF(start, | |
282 &playtime.cdmsf_min0, &playtime.cdmsf_sec0, &playtime.cdmsf_frame0); | |
283 FRAMES_TO_MSF(start+length, | |
284 &playtime.cdmsf_min1, &playtime.cdmsf_sec1, &playtime.cdmsf_frame1); | |
285 #ifdef DEBUG_CDROM | |
286 fprintf(stderr, "Trying to play from %d:%d:%d to %d:%d:%d\n", | |
287 playtime.cdmsf_min0, playtime.cdmsf_sec0, playtime.cdmsf_frame0, | |
288 playtime.cdmsf_min1, playtime.cdmsf_sec1, playtime.cdmsf_frame1); | |
289 #endif | |
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290 |
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291 return SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime); |
724 | 292 } |
293 | |
294 /* Pause play */ | |
295 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
296 { | |
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297 return SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0); |
724 | 298 } |
299 | |
300 /* Resume play */ | |
301 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
302 { | |
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303 return SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0); |
724 | 304 } |
305 | |
306 /* Stop play */ | |
307 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
308 { | |
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309 return SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0); |
724 | 310 } |
311 | |
312 /* Eject the CD-ROM */ | |
313 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
314 { | |
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315 return SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0); |
724 | 316 } |