libcdio-osx/lib/cdio.c

/*
    $Id: cdio.c,v 1.1 2003/03/24 19:01:09 rocky Exp $

    Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
    Copyright (C) 2001 Herbert Valerio Riedel <hvr@gnu.org>

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

#include "cdio_assert.h"
#include "util.h"
#include "logging.h"
#include "cdio_private.h"

static const char _rcsid[] = "$Id: cdio.c,v 1.1 2003/03/24 19:01:09 rocky Exp $";


const char *track_format2str[5] = 
  {
    "audio", "CD-i", "XA", "data", "error"
  };

/* The below array gives of the drivers that are currently available for 
   on a particular host. */

CdIo_driver_t CdIo_driver[MAX_DRIVER] = { {0} };

struct _CdIo {
  void *user_data;
  cdio_funcs op;
};

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

static bool 
cdio_have_false(void)
{
  return false;
}


/* The below array gives all drivers that can possibly appear.
   on a particular host. */

CdIo_driver_t CdIo_all_drivers[MAX_DRIVER+1] = { 
  {DRIVER_UNKNOWN, 
   0,
   "Unknown", 
   "No driver",
   &cdio_have_false,
   NULL
  },

  {DRIVER_LINUX, 
   CDIO_SRC_IS_DEVICE_MASK|CDIO_SRC_IS_NATIVE_MASK,
   "Linux", 
   "Linux ioctl and packet driver",
   &cdio_have_linux,
   &cdio_open_linux
  },

  {DRIVER_SOLARIS, 
   CDIO_SRC_IS_DEVICE_MASK|CDIO_SRC_IS_NATIVE_MASK|CDIO_SRC_IS_SCSI_MASK,
   "Solaris",
   "Solaris ATAPI and SCSI driver",
   &cdio_have_solaris,
   &cdio_open_solaris
  },

  {DRIVER_BSDI, 
   CDIO_SRC_IS_DEVICE_MASK|CDIO_SRC_IS_NATIVE_MASK|CDIO_SRC_IS_SCSI_MASK,
   "BSDI",
   "BSDI ATAPI and SCSI driver",
   &cdio_have_bsdi,
   cdio_open_bsdi
  },

  {DRIVER_NRG,
   CDIO_SRC_IS_DISK_IMAGE_MASK,
   "NRG",
   "Nero NRG disk image driver",
   &cdio_have_nrg,
   &cdio_open_nrg
  },

  {DRIVER_BINCUE,
   CDIO_SRC_IS_DISK_IMAGE_MASK,
   "BIN/CUE",
   "bin/cuesheet disk image driver",
   &cdio_have_bincue,
   &cdio_open_bincue
  }

};

/*!
  Eject media in CD drive if there is a routine to do so. 
  Return 0 if success and 1 for failure, and 2 if no routine.
 */
int
cdio_eject_media (const CdIo *obj)
{
  cdio_assert (obj != NULL);

  if (obj->op.eject_media) {
    return obj->op.eject_media (obj->user_data);
  } else {
    return 2;
  }
}

/*!
  Return a string containing the default CD device if none is specified.
 */
const char *
cdio_get_arg (const CdIo *obj, const char key[])
{
  cdio_assert (obj != NULL);

  if (obj->op.get_arg) {
    return obj->op.get_arg (obj->user_data, key);
  } else {
    return NULL;
  }
}

/*!
  Return a string containing the default CD device if none is specified.
 */
char *
cdio_get_default_device (const CdIo *obj)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_default_device) {
    return obj->op.get_default_device ();
  } else {
    return NULL;
  }
}

/*!
  Return the number of of the first track. 
  CDIO_INVALID_TRACK is returned on error.
*/
track_t
cdio_get_first_track_num (const CdIo *obj)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_first_track_num) {
    return obj->op.get_first_track_num (obj->user_data);
  } else {
    return CDIO_INVALID_TRACK;
  }
}

/*! 
  Return the number of tracks in the current medium.
  CDIO_INVALID_TRACK is returned on error.
*/
track_t
cdio_get_num_tracks (const CdIo *obj)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_num_tracks) {
    return obj->op.get_num_tracks (obj->user_data);
  } else {
    return CDIO_INVALID_TRACK;
  }
}

/*!  
  Get format of track. 
*/
track_format_t
cdio_get_track_format(const CdIo *obj, track_t track_num)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_track_format) {
    return obj->op.get_track_format (obj->user_data, track_num);
  } else {
    return TRACK_FORMAT_ERROR;
  }
}

/*!
  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 *obj, track_t track_num)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_track_green) {
    return obj->op.get_track_green (obj->user_data, track_num);
  } else {
    return false;
  }
}

/*!  
  Return the starting MSF (minutes/secs/frames) for track number
  track_num in obj.  Track numbers start at 1.
  The "leadout" track is specified either by
  using track_num LEADOUT_TRACK or the total tracks+1.
  False is returned if there is no track entry.
*/
bool
cdio_get_track_msf(const CdIo *obj, track_t track_num, msf_t *msf)
{
  cdio_assert (obj != NULL);

  if (obj->op.get_track_msf) {
    return obj->op.get_track_msf (obj->user_data, track_num, msf);
  } else {
    return false;
  }
}

bool
cdio_have_driver(driver_id_t driver_id)
{
  return (*CdIo_all_drivers[driver_id].have_driver)();
}


/*!
  Initialize CD Reading and control routines. Should be called first.
  May be implicitly called by other routines if not called first.
*/
bool
cdio_init(void)
{
  
  CdIo_driver_t *all_dp;
  CdIo_driver_t *dp = CdIo_driver;
  driver_id_t driver_id;

  if (CdIo_last_driver != -1) {
    cdio_warn ("Init routine called more than once.");
    return false;
  }

  for (driver_id=DRIVER_UNKNOWN; driver_id<=MAX_DRIVER; driver_id++) {
    all_dp = &CdIo_all_drivers[driver_id];
    if ((*CdIo_all_drivers[driver_id].have_driver)()) {
      *dp++ = *all_dp;
      CdIo_last_driver++;
    }
  }

  return true;
}

CdIo *
cdio_new (void *user_data, const cdio_funcs *funcs)
{
  CdIo *new_obj;

  new_obj = _cdio_malloc (sizeof (CdIo));

  new_obj->user_data = user_data;
  new_obj->op = *funcs;

  return new_obj;
}

void
cdio_destroy (CdIo *obj)
{
  cdio_assert (obj != NULL);
  
  obj->op.free (obj->user_data);
  free (obj);
}

int
cdio_read_mode2_sectors (CdIo *obj, void *buf, lsn_t lsn, bool mode2raw, 
                         unsigned num_sectors)
{
  char *_buf = buf;
  const int blocksize = mode2raw ? M2RAW_SECTOR_SIZE : M2F1_SECTOR_SIZE;
  int n, rc;

  cdio_assert (obj != NULL);
  cdio_assert (buf != NULL);
  cdio_assert (obj->op.read_mode2_sector != NULL 
	      || obj->op.read_mode2_sectors != NULL);
  
  if (obj->op.read_mode2_sectors)
    return obj->op.read_mode2_sectors (obj->user_data, buf, lsn,
				       mode2raw, num_sectors);

  /* fallback */
  if (obj->op.read_mode2_sector != NULL)
    for (n = 0; n < num_sectors; n++)
      if ((rc = cdio_read_mode2_sector (obj, &_buf[n * blocksize],
						    lsn + n, mode2raw)))
	return rc;
  
  return 0;
}

/*!
   Reads a single mode2 sector from cd device into data starting
   from lsn. Returns 0 if no error. 
 */
int
cdio_read_mode2_sector (CdIo *obj, void *buf, uint32_t lsn, bool mode2raw)
{
  cdio_assert (obj != NULL);
  cdio_assert (buf != NULL);
  cdio_assert (obj->op.read_mode2_sector != NULL 
	      || obj->op.read_mode2_sectors != NULL);

  if (obj->op.read_mode2_sector)
    return obj->op.read_mode2_sector (obj->user_data, buf, lsn, mode2raw);

  /* fallback */
  if (obj->op.read_mode2_sectors != NULL)
    return cdio_read_mode2_sectors (obj, buf, lsn, mode2raw, 1);
  return 1;
}

uint32_t
cdio_stat_size (CdIo *obj)
{
  cdio_assert (obj != NULL);

  return obj->op.stat_size (obj->user_data);
}

/*!
  Set the arg "key" with "value" in the source device.
*/
int
cdio_set_arg (CdIo *obj, const char key[], const char value[])
{
  cdio_assert (obj != NULL);
  cdio_assert (obj->op.set_arg != NULL);
  cdio_assert (key != NULL);

  return obj->op.set_arg (obj->user_data, key, value);
}

/*! Sets up to read from place specified by source_name and
  driver_id This should be called before using any other routine,
  except cdio_init. This will call cdio_init, if that hasn't been
  done previously.  to call one of the specific routines below. 
  
  NULL is returned on error.
*/
/* In the future we'll have more complicated code to allow selection
   of an I/O routine as well as code to find an appropriate default
   routine among the "registered" routines. Possibly classes too
   disk-based, SCSI-based, native-based, vendor (e.g. Sony, or
   Plextor) based 

   For now though, we'll start more simply...
*/
CdIo *
cdio_open (const char *source_name, driver_id_t driver_id)
{
  if (CdIo_last_driver == -1) cdio_init();

  switch (driver_id) {
  case DRIVER_UNKNOWN:
  case DRIVER_DEVICE: 
    {  
      /* Scan for a driver. */
      for (driver_id=DRIVER_UNKNOWN; driver_id<=MAX_DRIVER; driver_id++) {
        if ((*CdIo_all_drivers[driver_id].have_driver)()) {
          CdIo *ret=(*CdIo_all_drivers[driver_id].driver_open)(source_name);
          if (ret != NULL) return ret;
        }
      }
      return NULL;
    }
    break;
  case DRIVER_LINUX:
  case DRIVER_SOLARIS:
  case DRIVER_BSDI:
  case DRIVER_NRG:
  case DRIVER_BINCUE:
    if ((*CdIo_all_drivers[driver_id].have_driver)()) {
      return (*CdIo_all_drivers[driver_id].driver_open)(source_name);
    }
  }
  
  return NULL;
}


/* In the future we'll have more complicated code to allow selection
   of an I/O routine as well as code to find an appropriate default
   routine among the "registered" routines. Possibly classes too
   disk-based, SCSI-based, native-based, vendor (e.g. Sony, or
   Plextor) based 

   For now though, we'll start more simply...
*/
CdIo *
cdio_open_cd (const char *source_name)
{
  driver_id_t driver_id;
  
  if (CdIo_last_driver == -1) cdio_init();

  /* Scan for a driver. */
  for (driver_id=DRIVER_UNKNOWN; driver_id<=MAX_DRIVER; driver_id++) {
    if ((*CdIo_all_drivers[driver_id].have_driver)()) {
      CdIo *ret=(*CdIo_all_drivers[driver_id].driver_open)(source_name);
      if (ret != NULL) return ret;
    }
  }
  return NULL;
}



/* 
 * Local variables:
 *  c-file-style: "gnu"
 *  tab-width: 8
 *  indent-tabs-mode: nil
 * End:
 */