nathan@0: /* cdrom.c
nathan@4: Copyright (c) 2000-2004 Craig Condit, Stefan Hülswitt.
nathan@0: 
nathan@0: Redistribution and use in source and binary forms, with or without
nathan@0: modification, are permitted provided that the following conditions are met: 
nathan@0: 
nathan@0: 1. Redistributions of source code must retain the above copyright notice,
nathan@0:    this list of conditions and the following disclaimer. 
nathan@0: 2. Redistributions in binary form must reproduce the above copyright notice,
nathan@0:    this list of conditions and the following disclaimer in the documentation
nathan@0:    and/or other materials provided with the distribution. 
nathan@0: 
nathan@0: THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
nathan@0: OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
nathan@0: WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
nathan@0: DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
nathan@0: ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
nathan@0: DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
nathan@0: SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
nathan@0: CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
nathan@0: LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
nathan@0: OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
nathan@0: SUCH DAMAGE.
nathan@0: */
nathan@0: 
nathan@0: #define _LARGEFILE64_SOURCE
nathan@0: 
nathan@0: #include <stdlib.h>
nathan@0: #include <stdio.h>
nathan@0: #include <sys/ioctl.h>
nathan@0: 
nathan@4: #ifdef linux
nathan@4: #include <linux/fs.h>
nathan@4: #endif
nathan@4: 
nathan@2: #include "cdrom.h"
nathan@0: #include "misc.h"
nathan@2: #include "debug.h"
nathan@0: 
nathan@0: /* size of leadin/out depending of how many tracks are on cd */
nathan@4: #define LEADOUT_1	11400 /* 1th track */
nathan@4: #define LEADOUT_2	6900  /* 2nd and more tracks */
nathan@2: /* number of (unreadable) runout sectos */
nathan@2: #define RUNOUT          2
nathan@0: 
nathan@4: extern int fd;
nathan@0: extern int verbose;
nathan@0: extern char *prg_name;
nathan@0: 
nathan@0: /****************************************************************************/
nathan@0: 
nathan@2: void get_param(int fd, unsigned long *ahead, unsigned long *fahead)
nathan@2: {
nathan@2: #if defined(BLKRAGET) && defined(BLKFRAGET)
nathan@2:   *ahead = *fahead = 0;
nathan@2:   ioctl(fd,BLKRAGET,ahead);
nathan@2:   ioctl(fd,BLKFRAGET,fahead);
nathan@2:   DEBUG("get_param: readahead=%ld freadahead=%ld\n",*ahead,*fahead);
nathan@2: #else
nathan@4:   fprintf(stderr,"Can't get readahead parameter. Ioctl's not available\n");
nathan@2: #endif
nathan@2: }
nathan@2: 
nathan@2: /****************************************************************************/
nathan@2: 
nathan@2: void set_param(int fd, unsigned long ahead, unsigned long fahead)
nathan@2: {
nathan@2: #if defined(BLKRAGET) && defined(BLKFRAGET)
nathan@4:   ioctl(fd,BLKRASET,ahead);
nathan@4:   ioctl(fd,BLKFRASET,fahead);
nathan@2:   DEBUG("set_param: readahead=%ld freadahead=%ld\n",ahead,fahead);
nathan@2: #else
nathan@4:   fprintf(stderr,"Can't set readahead parameter. Ioctl's not available\n");
nathan@2: #endif
nathan@2: }
nathan@2: 
nathan@2: /****************************************************************************/
nathan@2: 
nathan@4: int getCdHeader(struct cd_header *cd)
nathan@0: {
nathan@0:   struct cdrom_tochdr cd_header;
nathan@0:   struct cdrom_tocentry cd_entry;
nathan@4:   int tracks;
nathan@4: 
nathan@4:   if(ioctl(fd,CDROMREADTOCHDR,&cd_header)<0) {
nathan@4:     if(verbose) fprintf(stderr,"%s: Unable to read CD header, assuming empty CD-R\n",prg_name);
nathan@4:     cd->start_track=1; cd->end_track=0;
nathan@4:     cd->used=0;
nathan@4:     return 0;
nathan@0:     }
nathan@0: 
nathan@4:   cd->start_track=cd_header.cdth_trk0;
nathan@4:   cd->end_track  =cd_header.cdth_trk1;
nathan@4:   tracks=cd->end_track-cd->start_track+1;
nathan@0: 
nathan@4:   cd_entry.cdte_format=CDROM_LBA;
nathan@4:   cd_entry.cdte_track=CDROM_LEADOUT;
nathan@4:   if(ioctl(fd,CDROMREADTOCENTRY,&cd_entry)<0) error("Ioctl failed (lead-out)");
nathan@0: 
nathan@4:   cd->used=cd_entry.cdte_addr.lba + (tracks==1 ? LEADOUT_1:LEADOUT_2);
nathan@0:   return tracks;
nathan@0: }
nathan@0: 
nathan@0: /****************************************************************************/
nathan@0: 
nathan@4: void getCdTrack(int num, struct cd_track *cd)
nathan@0: {
nathan@4:   struct cdrom_tocentry cd_entry;
nathan@4: 
nathan@4:   cd_entry.cdte_format=CDROM_LBA;
nathan@4:   cd_entry.cdte_track=num;
nathan@4:   if(ioctl(fd,CDROMREADTOCENTRY,&cd_entry)<0) error("Ioctl failed (toc entry)");  
nathan@4: 
nathan@4:   cd->start_sec   =cd_entry.cdte_addr.lba;
nathan@4:   cd->leadout_size=RUNOUT+(num==cd->start_track ? LEADOUT_1:LEADOUT_2);
nathan@4:   cd->is_data     =(cd_entry.cdte_ctrl&CDROM_DATA_TRACK) ? 1:0;
nathan@0: }