src/cdrom/mint/SDL_syscdrom.c

   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 */