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/*
$Id: toc.c,v 1.5 2005/01/10 02:10:46 rocky Exp $
Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>
Copyright (C) 1998 Monty xiphmont@mit.edu
derived from code (C) 1994-1996 Heiko Eissfeldt
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/******************************************************************
* Table of contents convenience functions
******************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "low_interface.h"
#include "utils.h"
/*! Return the lsn for the start of track i_track */
lsn_t
cdda_track_firstsector(cdrom_drive_t *d, track_t i_track)
{
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-1);
}
if (i_track == 0) {
if (d->disc_toc[0].dwStartSector == 0) {
/* first track starts at lsn 0 -> no pre-gap */
cderror(d,"401: Invalid track number\n");
return(-1);
}
else {
return 0; /* pre-gap of first track always starts at lba 0 */
}
}
if( i_track>d->tracks) {
cderror(d,"401: Invalid track number\n");
return(-1);
}
{
const track_t i_first_track = cdio_get_first_track_num(d->p_cdio);
return(d->disc_toc[i_track-i_first_track].dwStartSector);
}
}
/*! Get first lsn of the first audio track. -1 is returned on error. */
lsn_t
cdda_disc_firstsector(cdrom_drive_t *d)
{
int i;
if(!d->opened){
cderror(d,"400: Device not open\n");
return(-1);
}
/* 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(-1);
}
/*! Get last lsn of the track. The lsn is generally one less than the
start of the next track. -1 is returned on error. */
lsn_t
cdda_track_lastsector(cdrom_drive_t *d, track_t i_track)
{
if (!d->opened) {
cderror(d,"400: Device not open\n");
return -1;
}
if (i_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(-1);
}
else {
return d->disc_toc[0].dwStartSector-1;
}
}
if ( i_track<1 || i_track>d->tracks ) {
cderror(d,"401: Invalid track number\n");
return -1;
}
/* Safe, we've always the leadout at disc_toc[tracks] */
return(d->disc_toc[i_track].dwStartSector-1);
}
/*! Get last lsn of the last audio track. The last lssn generally one
less than the start of the next track after the audio track. -1 is
returned on error. */
lsn_t
cdda_disc_lastsector(cdrom_drive_t *d)
{
if (!d->opened) {
cderror(d,"400: Device not open\n");
return -1;
} else {
/* look for an audio track */
const track_t i_first_track = cdio_get_first_track_num(d->p_cdio);
track_t i = cdio_get_last_track_num(d->p_cdio);
for ( ; i >= i_first_track; i-- )
if ( cdda_track_audiop(d,i) )
return (cdda_track_lastsector(d,i));
}
cderror(d,"403: No audio tracks on disc\n");
return -1;
}
/*! Return the number of tracks on the CD. */
track_t
cdda_tracks(cdrom_drive_t *d)
{
if (!d->opened){
cderror(d,"400: Device not open\n");
return -1;
}
return(d->tracks);
}
/*! Return the track containing the given LSN. If the LSN is before
the first track (in the pregap), 0 is returned. If there was an
error or the LSN after the LEADOUT (beyond the end of the CD), then
CDIO_INVALID_TRACK is returned.
*/
int
cdda_sector_gettrack(cdrom_drive_t *d, lsn_t lsn)
{
if (!d->opened) {
cderror(d,"400: Device not open\n");
return -1;
} else {
if (lsn < d->disc_toc[0].dwStartSector)
return 0; /* We're in the pre-gap of first track */
return cdio_get_track(d->p_cdio, lsn);
}
}
/*! Return the number of channels in track: 2 or 4; -2 if not
implemented or -1 for error.
Not meaningful if track is not an audio track.
*/
int
cdda_track_channels(cdrom_drive_t *d, track_t i_track)
{
return(cdio_get_track_channels(d->p_cdio, i_track));
}
/*! Return 1 is track is an audio track, 0 otherwise. */
int
cdda_track_audiop(cdrom_drive_t *d, track_t i_track)
{
track_format_t track_format = cdio_get_track_format(d->p_cdio, i_track);
return TRACK_FORMAT_AUDIO == track_format ? 1 : 0;
}
/*! Return 1 is track is an audio track, 0 otherwise. */
int
cdda_track_copyp(cdrom_drive_t *d, track_t i_track)
{
track_flag_t track_flag = cdio_get_track_copy_permit(d->p_cdio, i_track);
return CDIO_TRACK_FLAG_TRUE == track_flag ? 1 : 0;
}
/*! Return 1 is audio track has linear preemphasis set, 0 otherwise.
Only makes sense for audio tracks.
*/
int
cdda_track_preemp(cdrom_drive_t *d, track_t i_track)
{
track_flag_t track_flag = cdio_get_track_preemphasis(d->p_cdio, i_track);
return CDIO_TRACK_FLAG_TRUE == track_flag ? 1 : 0;
}
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