| 1 | /* |
| 2 | SDL - Simple DirectMedia Layer |
| 3 | Copyright (C) 1997-2009 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 | |
| 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 */ |