src/cdrom/osf/SDL_syscdrom.c
author Sam Lantinga <slouken@libsdl.org>
Fri, 14 Apr 2006 04:46:47 +0000
changeset 1635 92947e3a18db
parent 1438 1f4f09641645
child 1662 782fd950bd46
child 1895 c121d94672cb
permissions -rw-r--r--
Make sure code is only compiled if the appropriate subsystem is enabled
     1 /*
     2     Tru64 audio module for SDL (Simple DirectMedia Layer)
     3     Copyright (C) 2003
     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 
    20 */
    21 #include "SDL_config.h"
    22 
    23 #ifdef SDL_CDROM_OSF
    24 
    25 /* Functions for system-level CD-ROM audio control */
    26 
    27 /* #define DEBUG_CDROM 1 */
    28 
    29 #include <sys/types.h>
    30 #include <dirent.h>
    31 #include <sys/stat.h>
    32 #include <fcntl.h>
    33 #include <io/cam/cdrom.h>
    34 #include <io/cam/rzdisk.h>
    35 #include <io/common/devgetinfo.h>
    36 
    37 #include "SDL_cdrom.h"
    38 #include "../SDL_syscdrom.h"
    39 
    40 /* The maximum number of CD-ROM drives we'll detect */
    41 #define MAX_DRIVES 16
    42 
    43 /* A list of available CD-ROM drives */
    44 static char *SDL_cdlist[MAX_DRIVES];
    45 static dev_t SDL_cdmode[MAX_DRIVES];
    46 
    47 /* The system-dependent CD control functions */
    48 static const char *SDL_SYS_CDName(int drive);
    49 static int         SDL_SYS_CDOpen(int drive);
    50 static int         SDL_SYS_CDGetTOC(SDL_CD *cdrom);
    51 static CDstatus    SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
    52 static int         SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
    53 static int         SDL_SYS_CDPause(SDL_CD *cdrom);
    54 static int         SDL_SYS_CDResume(SDL_CD *cdrom);
    55 static int         SDL_SYS_CDStop(SDL_CD *cdrom);
    56 static int         SDL_SYS_CDEject(SDL_CD *cdrom);
    57 static void        SDL_SYS_CDClose(SDL_CD *cdrom);
    58 
    59 /* Check a drive to see if it is a CD-ROM */
    60 /* Caution!! Not tested. */ 
    61 static int CheckDrive(char *drive, struct stat *stbuf)
    62 {
    63     int cdfd, is_cd = 0;
    64     struct mode_sel_sns_params msp;
    65     struct inquiry_info inq;
    66 
    67 #ifdef DEBUG_CDROM
    68     char *devtype[] = {"Disk", "Tape", "Printer", "Processor", "WORM",
    69 	"CD-ROM", "Scanner", "Optical", "Changer", "Comm", "Unknown"};
    70 #endif
    71 
    72     bzero(&msp, sizeof(msp));
    73     bzero(&inq, sizeof(inq));
    74 
    75     /* If it doesn't exist, return -1 */
    76     if ( stat(drive, stbuf) < 0 ) {
    77 	return(-1);
    78     }
    79 
    80     if ( (cdfd = open(drive, (O_RDWR|O_NDELAY), 0)) >= 0 ) {
    81 	msp.msp_addr   =   (caddr_t) &inq;
    82 	msp.msp_pgcode =                0;
    83 	msp.msp_pgctrl =                0;
    84 	msp.msp_length =      sizeof(inq);
    85 	msp.msp_setps  =                0;
    86 
    87 	if ( ioctl(cdfd, SCSI_GET_INQUIRY_DATA, &msp) )
    88 	    return (0);
    89 
    90 #ifdef DEBUG_CDROM
    91 	fprintf(stderr, "Device Type: %s\n", devtype[inq.perfdt]);
    92 	fprintf(stderr, "Vendor: %.8s\n", inq.vndrid);
    93 	fprintf(stderr, "Product: %.8s\n", inq.prodid);
    94 	fprintf(stderr, "Revision: %.8s\n", inq.revlvl);
    95 #endif
    96 	if ( inq.perfdt == DTYPE_RODIRECT )
    97 	    is_cd = 1;
    98     }
    99 
   100     return(is_cd);
   101 }
   102 
   103 /* Add a CD-ROM drive to our list of valid drives */
   104 static void AddDrive(char *drive, struct stat *stbuf)
   105 {
   106     int i;
   107 
   108     if ( SDL_numcds < MAX_DRIVES ) {
   109 	/* Check to make sure it's not already in our list.
   110 	 * This can happen when we see a drive via symbolic link.
   111 	 *
   112 	 */
   113 	for ( i=0; i<SDL_numcds; ++i ) {
   114 	    if ( stbuf->st_rdev == SDL_cdmode[i] ) {
   115 #ifdef DEBUG_CDROM
   116   fprintf(stderr, "Duplicate drive detected: %s == %s\n", drive, SDL_cdlist[i]);
   117 #endif
   118 	    return;
   119 	    }
   120 	}
   121 
   122 	/* Add this drive to our list */
   123 	i = SDL_numcds;
   124 	SDL_cdlist[i] = SDL_strdup(drive);
   125 	if ( SDL_cdlist[i] == NULL ) {
   126 	    SDL_OutOfMemory();
   127 	    return;
   128 	}
   129 	SDL_cdmode[i] = stbuf->st_rdev;
   130 	++SDL_numcds;
   131 #ifdef DEBUG_CDROM
   132   fprintf(stderr, "Added CD-ROM drive: %s\n", drive);
   133 #endif
   134     }
   135 }
   136 
   137 int  SDL_SYS_CDInit(void)
   138 {
   139     /* checklist:
   140      *
   141      * Tru64 5.X (/dev/rdisk/cdrom?c)
   142      * dir: /dev/rdisk, name: cdrom
   143      *
   144      * Digital UNIX 4.0X (/dev/rrz?c)
   145      * dir: /dev, name: rrz
   146      *
   147      */
   148     struct {
   149 	char *dir;
   150 	char *name;
   151     } checklist[] = {
   152 	{"/dev/rdisk", "cdrom"},
   153 	{"/dev", "rrz"},
   154 	{NULL, NULL}};
   155     char drive[32];
   156     char *SDLcdrom;
   157     int i, j, exists;
   158     struct stat stbuf;
   159 
   160     /* Fill in our driver capabilities */
   161     SDL_CDcaps.Name   = SDL_SYS_CDName;
   162     SDL_CDcaps.Open   = SDL_SYS_CDOpen;
   163     SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
   164     SDL_CDcaps.Status = SDL_SYS_CDStatus;
   165     SDL_CDcaps.Play   = SDL_SYS_CDPlay;
   166     SDL_CDcaps.Pause  = SDL_SYS_CDPause;
   167     SDL_CDcaps.Resume = SDL_SYS_CDResume;
   168     SDL_CDcaps.Stop   = SDL_SYS_CDStop;
   169     SDL_CDcaps.Eject  = SDL_SYS_CDEject;
   170     SDL_CDcaps.Close  = SDL_SYS_CDClose;
   171 
   172 
   173     /* Look in the environment for our CD-ROM drive list */
   174     SDLcdrom = SDL_getenv("SDL_CDROM");	/* ':' separated list of devices */
   175     if ( SDLcdrom != NULL ) {
   176 	char *cdpath, *delim;
   177 	size_t len = SDL_strlen(SDLcdrom)+1;
   178 	cdpath = SDL_stack_alloc(char, len);
   179 	if ( cdpath != NULL ) {
   180 	    SDL_strlcpy(cdpath, SDLcdrom, len);
   181 	    SDLcdrom = cdpath;
   182 	    do {
   183 		delim = SDL_strchr(SDLcdrom, ':');
   184 		if ( delim ) {
   185 		    *delim++ = '\0';
   186 		}
   187 		if ( CheckDrive(SDLcdrom, &stbuf) > 0 ) {
   188 		    AddDrive(SDLcdrom, &stbuf);
   189 		}
   190 		if ( delim ) {
   191 		    SDLcdrom = delim;
   192 		} else {
   193 		    SDLcdrom = NULL;
   194 		}
   195 	    } while ( SDLcdrom );
   196 	    SDL_stack_free(cdpath);
   197 	}
   198 
   199 	/* If we found our drives, there's nothing left to do */
   200 	if ( SDL_numcds > 0 ) {
   201 	    return(0);
   202 	}
   203     }
   204     /* Scan the system for CD-ROM drives */
   205     for ( i = 0; checklist[i].dir; ++i) {
   206 	DIR *devdir;
   207 	struct dirent *devent;
   208 	int name_len;
   209 
   210 	devdir = opendir(checklist[i].dir);
   211 	if (devdir) {
   212 	    name_len = SDL_strlen(checklist[i].name);
   213 	    while (devent = readdir(devdir))
   214 		if (SDL_memcmp(checklist[i].name, devent->d_name, name_len) == 0)
   215 		    if (devent->d_name[devent->d_namlen-1] == 'c') {
   216 			SDL_snprintf(drive, SDL_arraysize(drive), "%s/%s", checklist[i].dir, devent->d_name);
   217 #ifdef DEBUG_CDROM
   218 			fprintf(stderr, "Try to add drive: %s\n", drive);
   219 #endif
   220 			if ( CheckDrive(drive, &stbuf) > 0 )
   221 			    AddDrive(drive, &stbuf);
   222 		    }
   223 	    closedir(devdir);
   224 	} else {
   225 #ifdef DEBUG_CDROM
   226 	    fprintf(stderr, "cannot open dir: %s\n", checklist[i].dir);
   227 #endif
   228 	}
   229     }
   230     return (0);
   231 }
   232 
   233 static const char *SDL_SYS_CDName(int drive)
   234 {
   235     return(SDL_cdlist[drive]);
   236 }
   237 
   238 static int SDL_SYS_CDOpen(int drive)
   239 {
   240     /* O_RDWR: To use ioctl(fd, SCSI_STOP_UNIT) */
   241     return(open(SDL_cdlist[drive], (O_RDWR|O_NDELAY), 0));
   242 }
   243 
   244 static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
   245 {
   246     struct cd_toc                  toc;
   247     struct cd_toc_header           hdr;
   248     struct cd_toc_entry          *cdte;
   249     int i;
   250     int okay = 0;
   251     if ( ioctl(cdrom->id, CDROM_TOC_HEADER, &hdr) ) {
   252 	fprintf(stderr,"ioctl error CDROM_TOC_HEADER\n");
   253 	return -1;
   254     }
   255     cdrom->numtracks = hdr.th_ending_track - hdr.th_starting_track + 1;
   256     if ( cdrom->numtracks > SDL_MAX_TRACKS ) {
   257 	cdrom->numtracks = SDL_MAX_TRACKS;
   258     }
   259 #ifdef DEBUG_CDROM
   260   fprintf(stderr,"hdr.th_data_len1 = %d\n", hdr.th_data_len1);
   261   fprintf(stderr,"hdr.th_data_len0 = %d\n", hdr.th_data_len0);
   262   fprintf(stderr,"hdr.th_starting_track = %d\n", hdr.th_starting_track);
   263   fprintf(stderr,"hdr.th_ending_track = %d\n", hdr.th_ending_track);
   264   fprintf(stderr,"cdrom->numtracks = %d\n", cdrom->numtracks);
   265 #endif
   266     toc.toc_address_format = CDROM_LBA_FORMAT;
   267     toc.toc_starting_track = 0;
   268     toc.toc_alloc_length = (hdr.th_data_len1 << 8) +
   269 			    hdr.th_data_len0 + sizeof(hdr);
   270     if ( (toc.toc_buffer = alloca(toc.toc_alloc_length)) == NULL) {
   271 	fprintf(stderr,"cannot allocate toc.toc_buffer\n");
   272 	return -1;
   273     }
   274 
   275     bzero (toc.toc_buffer, toc.toc_alloc_length);
   276     if (ioctl(cdrom->id, CDROM_TOC_ENTRYS, &toc)) {
   277 	fprintf(stderr,"ioctl error CDROM_TOC_ENTRYS\n");
   278 	return -1;
   279     }
   280 
   281     cdte =(struct cd_toc_entry *) ((char *) toc.toc_buffer + sizeof(hdr));
   282     for (i=0; i <= cdrom->numtracks; ++i) {
   283 	if (i == cdrom->numtracks ) {
   284 	    cdrom->track[i].id = 0xAA;;
   285 	} else {
   286 	    cdrom->track[i].id = hdr.th_starting_track + i;
   287 	}
   288 
   289 	cdrom->track[i].type =
   290 	    cdte[i].te_control & CDROM_DATA_TRACK;
   291 	cdrom->track[i].offset =
   292 	    cdte[i].te_absaddr.lba.addr3 << 24 |
   293 	    cdte[i].te_absaddr.lba.addr2 << 16 |
   294 	    cdte[i].te_absaddr.lba.addr1 << 8  |
   295 	    cdte[i].te_absaddr.lba.addr0;
   296 	cdrom->track[i].length = 0;
   297 	if ( i > 0 ) {
   298 	    cdrom->track[i - 1].length =
   299 		cdrom->track[i].offset -
   300 		cdrom->track[i - 1].offset;
   301 	}
   302     }
   303 #ifdef DEBUG_CDROM
   304   for (i = 0; i <= cdrom->numtracks; i++) {
   305     fprintf(stderr,"toc_entry[%d].te_track_number = %d\n",
   306 	    i,cdte[i].te_track_number);
   307     fprintf(stderr,"cdrom->track[%d].id = %d\n", i,cdrom->track[i].id);
   308     fprintf(stderr,"cdrom->track[%d].type = %x\n", i,cdrom->track[i].type);
   309     fprintf(stderr,"cdrom->track[%d].offset = %d\n", i,cdrom->track[i].offset);
   310     fprintf(stderr,"cdrom->track[%d].length = %d\n", i,cdrom->track[i].length);
   311   }
   312 #endif
   313     if ( i == (cdrom->numtracks+1) ) {
   314 	okay = 1;
   315     }
   316 
   317     return(okay ? 0 : -1);
   318 }
   319 
   320 /* Get CD-ROM status */
   321 static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
   322 {
   323     CDstatus                     status;
   324     struct cd_sub_channel            sc;
   325     struct cd_subc_channel_data     scd;
   326 
   327     sc.sch_address_format = CDROM_LBA_FORMAT;
   328     sc.sch_data_format    = CDROM_CURRENT_POSITION;
   329     sc.sch_track_number   = 0;
   330     sc.sch_alloc_length   = sizeof(scd);
   331     sc.sch_buffer         = (caddr_t)&scd;
   332     if ( ioctl(cdrom->id, CDROM_READ_SUBCHANNEL, &sc) ) {
   333 	status = CD_ERROR;
   334 	fprintf(stderr,"ioctl error CDROM_READ_SUBCHANNEL \n");
   335     } else {
   336 	switch (scd.scd_header.sh_audio_status) {
   337 	    case AS_AUDIO_INVALID:
   338 		status = CD_STOPPED;
   339 		break;
   340 	    case AS_PLAY_IN_PROGRESS:
   341 		status = CD_PLAYING;
   342 		break;
   343 	    case AS_PLAY_PAUSED:
   344 		status = CD_PAUSED;
   345 		break;
   346 	    case AS_PLAY_COMPLETED:
   347 		status = CD_STOPPED;
   348 		break;
   349 	    case AS_PLAY_ERROR:
   350 		status = CD_ERROR;
   351 		break;
   352 	    case AS_NO_STATUS:
   353 		status = CD_STOPPED;
   354 		break;
   355 	    default:
   356 		status = CD_ERROR;
   357 		break;
   358 	}
   359 #ifdef DEBUG_CDROM
   360   fprintf(stderr,"scd.scd_header.sh_audio_status = %x\n",
   361 	scd.scd_header.sh_audio_status);
   362 #endif
   363     }
   364     if (position) {
   365 	if (status == CD_PLAYING || (status == CD_PAUSED) ) {
   366 	    *position =
   367 		scd.scd_position_data.scp_absaddr.lba.addr3 << 24 |
   368 		scd.scd_position_data.scp_absaddr.lba.addr2 << 16 |
   369 		scd.scd_position_data.scp_absaddr.lba.addr1 << 8  |
   370 		scd.scd_position_data.scp_absaddr.lba.addr0;
   371 	} else {
   372 	    *position = 0;
   373 	}
   374     }
   375 
   376     return status;
   377 }
   378 
   379 /* Start play */
   380 static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
   381 {
   382 /*
   383  * Play MSF
   384  */
   385     struct cd_play_audio_msf msf;
   386     int end;
   387 
   388     bzero(&msf, sizeof(msf));
   389     end = start +length;
   390     FRAMES_TO_MSF(start + 150, /* LBA = 4500*M + 75*S + F - 150 */
   391 		  &msf.msf_starting_M_unit,
   392 		  &msf.msf_starting_S_unit,
   393 		  &msf.msf_starting_F_unit);
   394     FRAMES_TO_MSF(end + 150, /* LBA = 4500*M + 75*S + F - 150 */
   395 		  &msf.msf_ending_M_unit,
   396 		  &msf.msf_ending_S_unit,
   397 		  &msf.msf_ending_F_unit);
   398 
   399     return(ioctl(cdrom->id, CDROM_PLAY_AUDIO_MSF, &msf));
   400 }
   401 
   402 /* Pause play */
   403 static int SDL_SYS_CDPause(SDL_CD *cdrom)
   404 {
   405     return(ioctl(cdrom->id, CDROM_PAUSE_PLAY));
   406 }
   407 
   408 /* Resume play */
   409 static int SDL_SYS_CDResume(SDL_CD *cdrom)
   410 {
   411     return(ioctl(cdrom->id, CDROM_RESUME_PLAY));
   412 }
   413 
   414 /* Stop play */
   415 static int SDL_SYS_CDStop(SDL_CD *cdrom)
   416 {
   417     return(ioctl(cdrom->id, SCSI_STOP_UNIT));
   418 }
   419 
   420 /* Eject the CD-ROM */
   421 static int SDL_SYS_CDEject(SDL_CD *cdrom)
   422 {
   423     return(ioctl(cdrom->id, CDROM_EJECT_CADDY));
   424 }
   425 
   426 /* Close the CD-ROM handle */
   427 static void SDL_SYS_CDClose(SDL_CD *cdrom)
   428 {
   429     close(cdrom->id);
   430 }
   431 
   432 void SDL_SYS_CDQuit(void)
   433 {
   434     int i;
   435 
   436     if ( SDL_numcds > 0 ) {
   437 	for ( i=0; i<SDL_numcds; ++i ) {
   438 	    SDL_free(SDL_cdlist[i]);
   439 	}
   440 	SDL_numcds = 0;
   441     }
   442 }
   443 
   444 #endif /* SDL_CDROM_OSF */