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/******************************************************************
* CopyPolicy: GNU Lesser General Public License 2.1 applies
* Copyright (C) 1998-2008 Monty xiphmont@mit.edu
* derived from code (C) 1994-1996 Heiko Eissfeldt
*
* Table of contents convenience functions
*
******************************************************************/
#include "low_interface.h"
#include "utils.h"
long cdda_track_firstsector(cdrom_drive *d,int track){
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
if (track == 0) {
if (d->disc_toc[0].dwStartSector == 0) {
/* first track starts at lba 0 -> no pre-gap */
cderror(d,"401: Invalid track number\n");
return(-401);
}
else {
return 0; /* pre-gap of first track always starts at lba 0 */
}
}
if(track<0 || track>d->tracks){
cderror(d,"401: Invalid track number\n");
return(-401);
}
return(d->disc_toc[track-1].dwStartSector);
}
long cdda_disc_firstsector(cdrom_drive *d){
int i;
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
/* look for an audio track */
for(i=0;i<d->tracks;i++)
if(cdda_track_audiop(d,i+1)==1) {
if (i == 0) /* disc starts at lba 0 if first track is an audio track */
return 0;
else
return(cdda_track_firstsector(d,i+1));
}
cderror(d,"403: No audio tracks on disc\n");
return(-403);
}
long cdda_track_lastsector(cdrom_drive *d,int track){
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
if (track == 0) {
if (d->disc_toc[0].dwStartSector == 0) {
/* first track starts at lba 0 -> no pre-gap */
cderror(d,"401: Invalid track number\n");
return(-401);
}
else {
return d->disc_toc[0].dwStartSector-1;
}
}
if(track<1 || track>d->tracks){
cderror(d,"401: Invalid track number\n");
return(-401);
}
/* Safe, we've always the leadout at disc_toc[tracks] */
return(d->disc_toc[track].dwStartSector-1);
}
long cdda_disc_lastsector(cdrom_drive *d){
int i;
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
/* look for an audio track */
for(i=d->tracks-1;i>=0;i--)
if(cdda_track_audiop(d,i+1)==1)
return(cdda_track_lastsector(d,i+1));
cderror(d,"403: No audio tracks on disc\n");
return(-403);
}
long cdda_tracks(cdrom_drive *d){
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
return(d->tracks);
}
int cdda_sector_gettrack(cdrom_drive *d,long sector){
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}else{
int i;
if (sector < d->disc_toc[0].dwStartSector)
return 0; /* We're in the pre-gap of first track */
for(i=0;i<d->tracks;i++){
if(d->disc_toc[i].dwStartSector<=sector &&
d->disc_toc[i+1].dwStartSector>sector)
return (i+1);
}
cderror(d,"401: Invalid track number\n");
return -401;
}
}
int cdda_track_bitmap(cdrom_drive *d,int track,int bit,int set,int clear){
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-400);
}
if (track == 0)
track = 1; /* map to first track number */
if(track<1 || track>d->tracks){
cderror(d,"401: Invalid track number\n");
return(-401);
}
if ((d->disc_toc[track-1].bFlags & bit))
return(set);
else
return(clear);
}
int cdda_track_channels(cdrom_drive *d,int track){
return(cdda_track_bitmap(d,track,8,4,2));
}
int cdda_track_audiop(cdrom_drive *d,int track){
return(cdda_track_bitmap(d,track,4,0,1));
}
int cdda_track_copyp(cdrom_drive *d,int track){
return(cdda_track_bitmap(d,track,2,1,0));
}
int cdda_track_preemp(cdrom_drive *d,int track){
return(cdda_track_bitmap(d,track,1,1,0));
}
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