libcdio-osx/lib/driver/cdio_private.h

/*
    $Id: cdio_private.h,v 1.25 2005/03/08 04:10:36 rocky Exp $

    Copyright (C) 2003, 2004, 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
*/

/* Internal routines for CD I/O drivers. */


#ifndef __CDIO_PRIVATE_H__
#define __CDIO_PRIVATE_H__

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <cdio/cdio.h>
#include <cdio/audio.h>
#include <cdio/cdtext.h>
#include "mmc_private.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

  /* Opaque type */
  typedef struct _CdioDataSource CdioDataSource_t;

#ifdef __cplusplus
}

#endif /* __cplusplus */

#include "generic.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */


  typedef struct {
    
    /*!
      Get volume of an audio CD.
      
      @param p_env the CD object to be acted upon.
      
    */
    driver_return_code_t (*audio_get_volume) 
	 (void *p_env,  /*out*/ cdio_audio_volume_t *p_volume);

    /*!
      Pause playing CD through analog output
      
      @param p_env the CD object to be acted upon.
    */
    driver_return_code_t (*audio_pause) (void *p_env);
    
    /*!
      Playing CD through analog output
      
      @param p_env the CD object to be acted upon.
    */
    driver_return_code_t (*audio_play_msf) ( void *p_env, 
					     msf_t *p_start_msf,
					     msf_t *p_end_msf );

    /*!
      Playing CD through analog output
      
      @param p_env the CD object to be acted upon.
    */
    driver_return_code_t (*audio_play_track_index) 
	 ( void *p_env, cdio_track_index_t *p_track_index );

    /*!
      Get subchannel information.
      
      @param p_env the CD object to be acted upon.
    */
    driver_return_code_t (*audio_read_subchannel) 
	 ( void *p_env, cdio_subchannel_t *subchannel );

    /*!
      Resume playing an audio CD.
      
      @param p_env the CD object to be acted upon.
      
    */
    driver_return_code_t (*audio_resume) ( void *p_env );
    
    /*!
      Set volume of an audio CD.
      
      @param p_env the CD object to be acted upon.
      
    */
    driver_return_code_t (*audio_set_volume) 
	 ( void *p_env,  cdio_audio_volume_t *p_volume );

    /*!
      Stop playing an audio CD.
      
      @param p_env the CD object to be acted upon.
      
    */
    driver_return_code_t (*audio_stop) ( void *p_env );
    
    /*!
      Close media tray in CD drive if there is a routine to do so. 
      
      @param p_env the CD object to be acted upon.
    */
    driver_return_code_t (*close_tray) ( void *p_env );
    
    /*!
      Eject media in CD drive. If successful, as a side effect we 
      also free p_env. 

      @param p_env the CD object to be acted upon.
      If the CD is ejected *p_env is freed and p_env set to NULL.
    */
    driver_return_code_t (*eject_media) ( void *p_env );
    
    /*!
      Release and free resources associated with cd. 
    */
    void (*free) (void *p_env);
    
    /*!
      Return the value associated with the key "arg".
    */
    const char * (*get_arg) (void *p_env, const char key[]);
    
    /*!
      Get the block size for subsequest read requests, via a SCSI MMC 
      MODE_SENSE 6 command.
    */
    int (*get_blocksize) ( void *p_env );
    
    /*! 
      Get cdtext information for a CdIo object.
    
      @param obj the CD object that may contain 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 * (*get_cdtext) ( void *p_env, track_t i_track );
    
    /*!
      Return an array of device names. if CdIo is NULL (we haven't
      initialized a specific device driver), then find a suitable device 
      driver.
      
      NULL is returned if we couldn't return a list of devices.
    */
    char ** (*get_devices) ( void );
    
    /*!
      Get the default CD device.

      @return a string containing the default CD device or NULL is
      if we couldn't get a default device.

      In some situations of drivers or OS's we can't find a CD device if
      there is no media in it and it is possible for this routine to return
      NULL even though there may be a hardware CD-ROM.
    */
    char * (*get_default_device) ( void );
    
    /*!
      Return the size of the CD in logical block address (LBA) units.
      @return the lsn. On error 0 or CDIO_INVALD_LSN.
    */
    lsn_t (*get_disc_last_lsn) ( void *p_env );

    /*! 
      Get disc mode associated with cd_obj.
    */
    discmode_t (*get_discmode) ( void *p_env );

    /*!
      Return the what kind of device we've got.
      
      See cd_types.h for a list of bitmasks for the drive type;
    */
    void (*get_drive_cap) (const void *p_env,
			   cdio_drive_read_cap_t  *p_read_cap,
			   cdio_drive_write_cap_t *p_write_cap,
			   cdio_drive_misc_cap_t  *p_misc_cap);
    /*!
      Return the number of of the first track. 
      CDIO_INVALID_TRACK is returned on error.
    */
    track_t (*get_first_track_num) ( void *p_env );
    
    /*! 
      Get the CD-ROM hardware info via a SCSI MMC INQUIRY command.
      False is returned if we had an error getting the information.
    */
    bool (*get_hwinfo) 
	 ( const CdIo_t *p_cdio, /* out*/ cdio_hwinfo_t *p_hw_info );

    /*! Get the LSN of the first track of the last session of
      on the CD.
	   
       @param p_cdio the CD object to be acted upon.
       @param i_last_session pointer to the session number to be returned.
    */
    driver_return_code_t (*get_last_session)
	 ( void *p_env, /*out*/ lsn_t *i_last_session );

    /*! 
      Find out if media has changed since the last call.
      @param p_env the CD object to be acted upon.
      @return 1 if media has changed since last call, 0 if not. Error
      return codes are the same as driver_return_code_t
    */
    int (*get_media_changed) ( const void *p_env );

    /*!  
      Return the media catalog number MCN from the CD or NULL if
      there is none or we don't have the ability to get it.
    */
    char * (*get_mcn) ( const void *p_env );

    /*! 
      Return the number of tracks in the current medium.
      CDIO_INVALID_TRACK is returned on error.
    */
    track_t (*get_num_tracks) ( void *p_env );
    
    /*! 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 (*get_track_channels) ( const void *p_env, track_t i_track );
  
    /*! Return 0 if track is copy protected, 1 if not, or -1 for error
      or -2 if not implimented (yet). Is this meaningful if not an
      audio track?
    */
    track_flag_t (*get_track_copy_permit) ( void *p_env, track_t i_track );
  
    /*!  
      Return the starting LBA for track number
      i_track in p_env.  Tracks numbers start at 1.
      The "leadout" track is specified either by
      using track_num LEADOUT_TRACK or the total tracks+1.
      CDIO_INVALID_LBA is returned on error.
    */
    lba_t (*get_track_lba) ( void *p_env, track_t i_track );
    
    /*!  
      Get format of track. 
    */
    track_format_t (*get_track_format) ( void *p_env, 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 (*get_track_green) ( void *p_env, track_t i_track );
    
    /*!  
      Return the starting MSF (minutes/secs/frames) for track number
      i_track in p_env.  Tracks numbers start at 1.
      The "leadout" track is specified either by
      using i_track LEADOUT_TRACK or the total tracks+1.
      False is returned on error.
    */
    bool (*get_track_msf) ( void *p_env, track_t i_track, msf_t *p_msf );
    
    /*! Return 1 if track has pre-emphasis, 0 if not, or -1 for error
      or -2 if not implimented (yet). Is this meaningful if not an
      audio track?
    */
    track_flag_t (*get_track_preemphasis) 
	 ( const void  *p_env, track_t i_track );
  
    /*!
      lseek - reposition read/write file offset
      Returns (off_t) -1 on error. 
      Similar to libc's lseek()
    */
    off_t (*lseek) ( void *p_env, off_t offset, int whence );
    
    /*!
      Reads into buf the next size bytes.
      Returns -1 on error. 
      Similar to libc's read()
    */
    ssize_t (*read) ( void *p_env, void *p_buf, size_t i_size );
    
    /*!
      Reads a single mode2 sector from cd device into buf starting
      from lsn. Returns 0 if no error. 
    */
    int (*read_audio_sectors) ( void *p_env, void *p_buf, lsn_t i_lsn,
				unsigned int i_blocks );
    
    /*!
      Read a data sector
      
      @param p_env environment to read from

      @param p_buf place to read data into.  The caller should make sure
      this location can store at least CDIO_CD_FRAMESIZE, 
      M2RAW_SECTOR_SIZE, or M2F2_SECTOR_SIZE depending
      on the kind of sector getting read. If you don't 
      know whether you have a Mode 1/2, Form 1/ Form 2/Formless
      sector best to reserve space for the maximum, 
      M2RAW_SECTOR_SIZE.

      @param i_lsn sector to read
      @param i_blocksize size of block. Should be either CDIO_CD_FRAMESIZE, 
      M2RAW_SECTOR_SIZE, or M2F2_SECTOR_SIZE. See comment above under p_buf.
    */
    driver_return_code_t (*read_data_sectors) 
	 ( void *p_env, void *p_buf, lsn_t i_lsn, uint16_t i_blocksize,
	   uint32_t i_blocks );
    
    /*!
      Reads a single mode2 sector from cd device into buf starting
      from lsn. Returns 0 if no error. 
    */
    int (*read_mode2_sector) 
	 ( void *p_env, void *p_buf, lsn_t i_lsn, bool b_mode2_form2 );
    
    /*!
      Reads i_blocks of mode2 sectors from cd device into data starting
      from lsn.
      Returns 0 if no error. 
    */
    int (*read_mode2_sectors) 
	 ( void *p_env, void *p_buf, lsn_t i_lsn, bool b_mode2_form2, 
	   unsigned int i_blocks );
    
    /*!
      Reads a single mode1 sector from cd device into buf starting
      from lsn. Returns 0 if no error. 
    */
    int (*read_mode1_sector) 
	 ( void *p_env, void *p_buf, lsn_t i_lsn, bool mode1_form2 );
    
    /*!
      Reads i_blocks of mode1 sectors from cd device into data starting
      from lsn.
      Returns 0 if no error. 
    */
    int (*read_mode1_sectors) 
	 ( void *p_env, void *p_buf, lsn_t i_lsn, bool mode1_form2, 
	   unsigned int i_blocks );
    
    bool (*read_toc) ( void *p_env ) ;

    /*!
      Run a SCSI MMC command. 
      
      cdio	        CD structure set by cdio_open().
      i_timeout_ms      time in milliseconds we will wait for the command
                        to complete. 
      cdb_len           number of bytes in cdb (6, 10, or 12).
      cdb	        CDB bytes. All values that are needed should be set on 
                        input. 
      b_return_data	TRUE if the command expects data to be returned in 
                        the buffer
      len	        Size of buffer
      buf	        Buffer for data, both sending and receiving
      
      Returns 0 if command completed successfully.
    */
    mmc_run_cmd_fn_t run_mmc_cmd;

    /*!
      Set the arg "key" with "value" in the source device.
    */
    int (*set_arg) ( void *p_env, const char key[], const char value[] );
    
    /*!
      Set the blocksize for subsequent reads. 
    */
    driver_return_code_t (*set_blocksize) ( void *p_env, 
					    uint16_t i_blocksize );

    /*!
      Set the drive speed. 
      
      @return 0 if everything went okay, -1 if we had an error. is -2
      returned if this is not implemented for the current driver.
    */
    int (*set_speed) ( void *p_env, int i_speed );

  } cdio_funcs_t;


  /*! Implementation of CdIo type */
  struct _CdIo {
    driver_id_t driver_id; /**< Particular driver opened. */
    cdio_funcs_t op;       /**< driver-specific routines handling
			        implementation*/
    void *env;             /**< environment. Passed to routine above. */
  };

  /* This is used in drivers that must keep their own internal 
     position pointer for doing seeks. Stream-based drivers (like bincue,
     nrg, toc, network) would use this. 
   */
  typedef struct 
  {
    off_t   buff_offset;      /* buffer offset in disk-image seeks. */
    track_t index;            /* Current track index in tocent. */
    lba_t   lba;              /* Current LBA */
  } internal_position_t;
  
  CdIo_t * cdio_new (generic_img_private_t *p_env, cdio_funcs_t *p_funcs);

  /* The below structure describes a specific CD Input driver  */
  typedef struct 
  {
    driver_id_t  id;
    unsigned int flags;
    const char  *name;
    const char  *describe;
    bool (*have_driver) (void); 
    CdIo_t *(*driver_open) (const char *psz_source_name); 
    CdIo_t *(*driver_open_am) (const char *psz_source_name, 
			     const char *psz_access_mode); 
    char *(*get_default_device) (void); 
    bool (*is_device) (const char *psz_source_name);
    char **(*get_devices) (void);
    driver_return_code_t (*close_tray) (const char *psz_device);
  } CdIo_driver_t;

  /* The below array gives of the drivers that are currently available for 
     on a particular host. */
  extern CdIo_driver_t CdIo_driver[CDIO_MAX_DRIVER];

  /* The last valid entry of Cdio_driver. -1 means uninitialzed. -2 
     means some sort of error.
   */
  extern int CdIo_last_driver; 

  /* The below array gives all drivers that can possibly appear.
     on a particular host. */
  extern CdIo_driver_t CdIo_all_drivers[CDIO_MAX_DRIVER+1];

  /*! 
    Add/allocate a drive to the end of drives. 
    Use cdio_free_device_list() to free this device_list.
  */
  void cdio_add_device_list(char **device_list[], const char *psz_drive,
			    unsigned int *i_drives);

  driver_return_code_t close_tray_linux (const char *psz_device);
  driver_return_code_t close_tray_solaris(const char *psz_device);
  driver_return_code_t close_tray_win32 (const char *psz_win32_drive);


#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __CDIO_PRIVATE_H__ */