/* -*- c -*-
    $Id: track.h,v 1.6 2005/01/29 20:54:20 rocky Exp $

    Copyright (C) 2005 Rocky Bernstein <rocky@panix.com>

    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
*/

/** \file track.h 
 *  \brief  The top-level header for track-related libcdio calls.
 */
#ifndef __CDIO_TRACK_H__
#define __CDIO_TRACK_H__

/*! The leadout track is always 0xAA, regardless of # of tracks on
    disc, or what value may be used internally. For example although
    OS X uses a different value for the lead-out track internally than
    given below, programmers should use CDIO_CDROM_LEADOUT_TRACK and
    not worry about this.
 */
#define	CDIO_CDROM_LEADOUT_TRACK 0xAA

/*! Largest CD track number */
#define CDIO_CD_MAX_TRACKS    99 
/*! Smallest CD track number */
#define CDIO_CD_MIN_TRACK_NO   1

/*! 
  Constant for invalid track number
*/
#define CDIO_INVALID_TRACK   0xFF
  
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

  /*! Printable tags for track_format_t enumeration.  */
  extern const char *track_format2str[6];
  
  typedef enum  {
    TRACK_FORMAT_AUDIO,   /**< Audio track, e.g. CD-DA */
    TRACK_FORMAT_CDI,     /**< CD-i. How this is different from DATA below? */
    TRACK_FORMAT_XA,      /**< Mode2 of some sort */
    TRACK_FORMAT_DATA,    /**< Mode1 of some sort */
    TRACK_FORMAT_PSX,     /**< Playstation CD. Like audio but only 2336 bytes
			   *   of user data.
			   */
    TRACK_FORMAT_ERROR    /**< Dunno what is, or some other error. */
  } track_format_t;

  typedef enum {
    CDIO_TRACK_FLAG_FALSE, 
    CDIO_TRACK_FLAG_TRUE, 
    CDIO_TRACK_FLAG_ERROR, 
    CDIO_TRACK_FLAG_UNKNOWN
  } track_flag_t;

  /*! \brief Structure containing attributes associated with a track */
  typedef struct {
    track_flag_t preemphasis; /**< Linear preemphasis on an audio track */
    track_flag_t copy_permit; /**< Whether copying is permitted */
    int channels;             /**< Number of audio channels, 2, 4. -2 if not
				   implemented or -1 for error.
			      */
  } track_flags_t;
    
  /*! 
    Get CD-Text information for a CdIo_t object.

    @param p_cdio the CD object that may contain CD-Text information.
    @param i_track track for which we are requesting CD-Text information.
    @return the CD-Text object or NULL if obj is NULL
    or CD-Text information does not exist.

    If i_track is 0 or CDIO_CDROM_LEADOUT_TRACK the track returned
    is the information assocated with the CD. 
  */
  cdtext_t *cdio_get_cdtext (CdIo_t *p_cdio, track_t i_track);

  /*!
    Get the number of the first track. 

    @return the track number or CDIO_INVALID_TRACK 
    on error.
  */
  track_t cdio_get_first_track_num(const CdIo_t *p_cdio);
  
  /*!
    Return the last track number.
    CDIO_INVALID_TRACK is returned on error.
  */
  track_t cdio_get_last_track_num (const CdIo_t *p_cdio);
  

  /*! Find the track which contans lsn.
    CDIO_INVALID_TRACK is returned if the lsn outside of the CD or
    if there was some error. 
    
    If the lsn is before the pregap of the first track 0 is returned.
    Otherwise we return the track that spans the lsn.
  */
  track_t cdio_get_track(const CdIo_t *p_cdio, lsn_t lsn);

  /*! Return 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 cdio_get_track_channels(const CdIo_t *p_cdio, track_t i_track);
  
  /*! Return copy protection status on a track. Is this meaningful
      if not an audio track?
   */
  track_flag_t cdio_get_track_copy_permit(const CdIo_t *p_cdio, 
					  track_t i_track);
  
  /*!  
    Get the format (audio, mode2, mode1) of track. 
  */
  track_format_t cdio_get_track_format(const CdIo_t *p_cdio, track_t i_track);
  
  /*!
    Return true if we have XA data (green, mode2 form1) or
    XA data (green, mode2 form2). That is track begins:
    sync - header - subheader
    12     4      -  8
    
    FIXME: there's gotta be a better design for this and get_track_format?
  */
  bool cdio_get_track_green(const CdIo_t *p_cdio, track_t i_track);
    
  /*!  
    Return the ending LSN for track number
    i_track in cdio.  CDIO_INVALID_LSN is returned on error.
  */
  lsn_t cdio_get_track_last_lsn(const CdIo_t *p_cdio, track_t i_track);

  /*!  
    Get the starting LBA for track number
    i_track in p_cdio.  Track numbers usually start at something 
    greater than 0, usually 1.

    The "leadout" track is specified either by
    using i_track CDIO_CDROM_LEADOUT_TRACK or the total tracks+1.

    @param p_cdio object to get information from
    @param i_track  the track number we want the LSN for
    @return the starting LBA or CDIO_INVALID_LBA on error.
  */
  lba_t cdio_get_track_lba(const CdIo_t *p_cdio, track_t i_track);
  
  /*!  
    Return the starting MSF (minutes/secs/frames) for track number
    i_track in p_cdio.  Track numbers usually start at something 
    greater than 0, usually 1.

    The "leadout" track is specified either by
    using i_track CDIO_CDROM_LEADOUT_TRACK or the total tracks+1.

    @param p_cdio object to get information from
    @param i_track  the track number we want the LSN for
    @return the starting LSN or CDIO_INVALID_LSN on error.
  */
  lsn_t cdio_get_track_lsn(const CdIo_t *p_cdio, track_t i_track);
  
  /*!  
    Return the starting MSF (minutes/secs/frames) for track number
    i_track in p_cdio.  Track numbers usually start at something 
    greater than 0, usually 1.

    The "leadout" track is specified either by
    using i_track CDIO_CDROM_LEADOUT_TRACK or the total tracks+1.
    
    @return true if things worked or false if there is no track entry.
  */
  bool cdio_get_track_msf(const CdIo_t *p_cdio, track_t i_track, 
			  /*out*/ msf_t *msf);
  
  /*! Get linear preemphasis status on an audio track 
      This is not meaningful if not an audio track?
   */
  track_flag_t cdio_get_track_preemphasis(const CdIo_t *p_cdio,
					  track_t i_track);
  
  /*!  
    Get the number of sectors between this track an the next.  This
    includes any pregap sectors before the start of the next track.
    Track numbers usually start at something 
    greater than 0, usually 1.

    @return the number of sectors or 0 if there is an error.
  */
  unsigned int cdio_get_track_sec_count(const CdIo_t *p_cdio, track_t i_track);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __CDIO_TRACK_H__ */

