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 (at) 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 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 } 130 131 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 ) { 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 */ 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 */ 294 static int SDL_SYS_CDPause(SDL_CD *cdrom) 295 { 296 return SDL_SYS_CDioctl(cdrom->id, CDROMPAUSE, 0); 297 } 298 299 /* Resume play */ 300 static int SDL_SYS_CDResume(SDL_CD *cdrom) 301 { 302 return SDL_SYS_CDioctl(cdrom->id, CDROMRESUME, 0); 303 } 304 305 /* Stop play */ 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 */ 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
