Mercurial > sdl-ios-xcode
annotate src/cdrom/mint/SDL_syscdrom.c @ 4372:ca91f36ef3de SDL-1.2
1.2 branch: fixed assembly code register clobbering.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Sun, 01 Nov 2009 17:51:39 +0000 |
| parents | a1b03ba2fcd0 |
| children | ab06accf1b96 |
| rev | line source |
|---|---|
| 724 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 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 */ | |
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22 #include "SDL_config.h" |
| 724 | 23 |
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24 #ifdef SDL_CDROM_MINT |
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25 |
| 724 | 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" | |
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38 #include "../SDL_syscdrom.h" |
| 724 | 39 |
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40 /* Some ioctl() errno values which occur when the tray is empty */ |
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41 #ifndef ENOMEDIUM |
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42 #define ENOMEDIUM ENOENT |
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43 #endif |
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44 #define ERRNO_TRAYEMPTY(errno) \ |
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45 ((errno == EIO) || (errno == ENOENT) || \ |
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46 (errno == EINVAL) || (errno == ENOMEDIUM)) |
| 724 | 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 | |
| 71 int SDL_SYS_CDInit(void) | |
| 72 { | |
| 73 metainit_t metainit={0,0,0,0}; | |
| 74 metaopen_t metaopen; | |
| 75 int i, handle; | |
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76 struct cdrom_subchnl info; |
| 724 | 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 | |
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104 info.cdsc_format = CDROM_MSF; |
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105 if ( (Metaioctl(i, METADOS_IOCTL_MAGIC, CDROMSUBCHNL, &info) == 0) || ERRNO_TRAYEMPTY(errno) ) { |
| 724 | 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 | |
| 131 void SDL_SYS_CDQuit(void) | |
| 132 { | |
| 133 SDL_numcds = 0; | |
| 134 } | |
| 135 | |
| 136 static const char *SDL_SYS_CDName(int drive) | |
| 137 { | |
| 138 return(metados_drives[drive].device); | |
| 139 } | |
| 140 | |
| 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 | |
| 153 static void SDL_SYS_CDClose(SDL_CD *cdrom) | |
| 154 { | |
| 155 Metaclose(metados_drives[cdrom->id].device[0]); | |
| 156 } | |
| 157 | |
| 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 | |
| 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 */ | |
| 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 ) { | |
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227 if ( ERRNO_TRAYEMPTY(errno) ) { |
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228 status = CD_TRAYEMPTY; |
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229 } else { |
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230 status = CD_ERROR; |
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231 } |
| 724 | 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 */ | |
| 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 | |
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289 |
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290 return SDL_SYS_CDioctl(cdrom->id, CDROMPLAYMSF, &playtime); |
| 724 | 291 } |
| 292 | |
| 293 /* Pause play */ | |
| 294 static int SDL_SYS_CDPause(SDL_CD *cdrom) | |
| 295 { | |
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296 return SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0); |
| 724 | 297 } |
| 298 | |
| 299 /* Resume play */ | |
| 300 static int SDL_SYS_CDResume(SDL_CD *cdrom) | |
| 301 { | |
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302 return SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0); |
| 724 | 303 } |
| 304 | |
| 305 /* Stop play */ | |
| 306 static int SDL_SYS_CDStop(SDL_CD *cdrom) | |
| 307 { | |
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308 return SDL_SYS_CDioctl(cdrom->id, CDROMSTOP, 0); |
| 724 | 309 } |
| 310 | |
| 311 /* Eject the CD-ROM */ | |
| 312 static int SDL_SYS_CDEject(SDL_CD *cdrom) | |
| 313 { | |
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314 return SDL_SYS_CDioctl(cdrom->id, CDROMEJECT, 0); |
| 724 | 315 } |
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316 |
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317 #endif /* SDL_CDROM_MINT */ |