First commit after CVS conversion. Should be just administrative changes.

lib/cdda_interface/toc.c

@@ -0,0 +1,210 @@
+/*
+  $Id: toc.c,v 1.7 2008/04/16 17:00:40 karl Exp $
+
+  Copyright (C) 2005, 2008 Rocky Bernstein <rocky@gnu.org>
+  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 3 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, see <http://www.gnu.org/licenses/>.
+*/
+/******************************************************************
+ * 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;
+  }
+  
+  /* CD Extra have their first session ending at the last audio track */
+  if (d->cd_extra > 0 && i_track+1 <= d->tracks) {
+    if (d->audio_last_sector >= d->disc_toc[i_track-1].dwStartSector &&
+        d->audio_last_sector < d->disc_toc[i_track].dwStartSector) {
+      return d->audio_last_sector;
+    }
+  }
+
+  /* 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;
+}
+