freebsd.c

linux下的MPEG1

  const _img_private_t *p_env = p_user_data;

  if (p_env->access_mode == _AM_CAM) 
    return run_scsi_cmd_freebsd_cam( p_user_data, i_timeout_ms, i_cdb, p_cdb, 
				     e_direction, i_buf, p_buf );
  else 
    return 2;
}  

/*!  
  Get format of track. 

  FIXME: We're just guessing this from the GNU/Linux code.
  
*/
static track_format_t
_get_track_format_freebsd(void *p_user_data, track_t i_track) 
{
  _img_private_t *p_env = p_user_data;

  if (!p_env->gen.toc_init) read_toc_freebsd (p_user_data) ;

  if (i_track > TOTAL_TRACKS || i_track == 0)
    return TRACK_FORMAT_ERROR;

  i_track -= FIRST_TRACK_NUM;

  /* This is pretty much copied from the "badly broken" cdrom_count_tracks
     in linux/cdrom.c.
   */
  if (p_env->tocent[i_track].entry.control & CDIO_CDROM_DATA_TRACK) {
    if (p_env->tocent[i_track].address_format == CDIO_CDROM_CDI_TRACK)
      return TRACK_FORMAT_CDI;
    else if (p_env->tocent[i_track].address_format == CDIO_CDROM_XA_TRACK)
      return TRACK_FORMAT_XA;
    else
      return TRACK_FORMAT_DATA;
  } else
    return TRACK_FORMAT_AUDIO;
  
}

/*!
  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?
*/
static bool
_get_track_green_freebsd(void *user_data, track_t i_track) 
{
  _img_private_t *p_env = user_data;
  
  if (i_track == CDIO_CDROM_LEADOUT_TRACK) i_track = TOTAL_TRACKS+1;

  if (i_track > TOTAL_TRACKS+1 || i_track == 0)
    return false;

  /* FIXME: Dunno if this is the right way, but it's what 
     I was using in cdinfo for a while.
   */
  return ((p_env->tocent[i_track-FIRST_TRACK_NUM].entry.control & 2) != 0);
}

/*!  
  Return the starting LSN track number
  i_track in obj.  Track numbers start at 1.
  The "leadout" track is specified either by
  using i_track LEADOUT_TRACK or the total tracks+1.
  CDIO_INVALID_LBA is returned if there is no track entry.
*/
static lba_t
_get_track_lba_freebsd(void *user_data, track_t i_track)
{
  _img_private_t *p_env = user_data;

  if (!p_env->gen.toc_init) read_toc_freebsd (p_env) ;

  if (i_track == CDIO_CDROM_LEADOUT_TRACK) i_track = TOTAL_TRACKS+1;

  if (i_track > TOTAL_TRACKS+1 || i_track == 0 || !p_env->gen.toc_init) {
    return CDIO_INVALID_LBA;
  } else {
    return cdio_lsn_to_lba(ntohl(p_env->tocent[i_track-FIRST_TRACK_NUM].entry.addr.lba));
  }
}

#endif /* HAVE_FREEBSD_CDROM */

/*!
  Return an array of strings giving possible CD devices.
 */
char **
cdio_get_devices_freebsd (void)
{
#ifndef HAVE_FREEBSD_CDROM
  return NULL;
#else
  char drive[40];
  char **drives = NULL;
  unsigned int num_drives=0;
  bool exists=true;
  char c;
  
  /* Scan the system for CD-ROM drives.
  */

#ifdef USE_ETC_FSTAB

  struct fstab *fs;
  setfsent();
  
  /* Check what's in /etc/fstab... */
  while ( (fs = getfsent()) )
    {
      if (strncmp(fs->fs_spec, "/dev/sr", 7))
	cdio_add_device_list(&drives, fs->fs_spec, &num_drives);
    }
  
#endif

  /* Scan the system for CD-ROM drives.
     Not always 100% reliable, so use the USE_MNTENT code above first.
  */

  /* Scan SCSI and CAM devices */
  for ( c='0'; exists && c <='9'; c++ ) {
    sprintf(drive, "/dev/cd%c%s", c, DEVICE_POSTFIX);
    exists = cdio_is_cdrom(drive, NULL);
    if ( exists ) {
      cdio_add_device_list(&drives, drive, &num_drives);
    }
  }

  /* Scan are ATAPI devices */
  for ( c='0'; exists && c <='9'; c++ ) {
    sprintf(drive, "/dev/acd%c%s", c, DEVICE_POSTFIX);
    exists = cdio_is_cdrom(drive, NULL);
    if ( exists ) {
      cdio_add_device_list(&drives, drive, &num_drives);
    }
  }
  cdio_add_device_list(&drives, NULL, &num_drives);
  return drives;
#endif /*HAVE_FREEBSD_CDROM*/
}

/*!
  Return a string containing the default CD device if none is specified.
 */
char *
cdio_get_default_device_freebsd()
{
#ifndef HAVE_FREEBSD_CDROM
  return NULL;
#else
  char drive[40];
  bool exists=true;
  char c;
  
  /* Scan the system for CD-ROM drives.
  */

#ifdef USE_ETC_FSTAB

  struct fstab *fs;
  setfsent();
  
  /* Check what's in /etc/fstab... */
  while ( (fs = getfsent()) )
    {
      if (strncmp(fs->fs_spec, "/dev/sr", 7))
	return strdup(fs->fs_spec);
    }
  
#endif

  /* Scan the system for CD-ROM drives.
     Not always 100% reliable, so use the USE_MNTENT code above first.
  */

  /* Scan SCSI and CAM devices */
  for ( c='0'; exists && c <='9'; c++ ) {
    sprintf(drive, "/dev/cd%c%s", c, DEVICE_POSTFIX);
    exists = cdio_is_cdrom(drive, NULL);
    if ( exists ) {
      return strdup(drive);
    }
  }

  /* Scan are ATAPI devices */
  for ( c='0'; exists && c <='9'; c++ ) {
    sprintf(drive, "/dev/acd%c%s", c, DEVICE_POSTFIX);
    exists = cdio_is_cdrom(drive, NULL);
    if ( exists ) {
      return strdup(drive);
    }
  }
  return NULL;
#endif /*HAVE_FREEBSD_CDROM*/
}

/*!
  Initialization routine. This is the only thing that doesn't
  get called via a function pointer. In fact *we* are the
  ones to set that up.
 */
CdIo *
cdio_open_freebsd (const char *psz_source_name)
{
  return cdio_open_am_freebsd(psz_source_name, NULL);
}


/*!
  Initialization routine. This is the only thing that doesn't
  get called via a function pointer. In fact *we* are the
  ones to set that up.
 */
CdIo *
cdio_open_am_freebsd (const char *psz_orig_source_name, 
		      const char *psz_access_mode)
{

#ifdef HAVE_FREEBSD_CDROM
  CdIo *ret;
  _img_private_t *_data;
  char *psz_source_name;

  cdio_funcs _funcs = {
    .eject_media        = _eject_media_freebsd,
    .free               = _free_freebsd,
    .get_arg            = _get_arg_freebsd,
    .get_cdtext         = get_cdtext_generic,
    .get_default_device = cdio_get_default_device_freebsd,
    .get_devices        = cdio_get_devices_freebsd,
    .get_discmode       = get_discmode_generic,
    .get_drive_cap      = get_drive_cap_freebsd,
    .get_first_track_num= get_first_track_num_generic,
    .get_mcn            = _get_mcn_freebsd,
    .get_num_tracks     = get_num_tracks_generic,
    .get_track_format   = _get_track_format_freebsd,
    .get_track_green    = _get_track_green_freebsd,
    .get_track_lba      = _get_track_lba_freebsd, 
    .get_track_msf      = NULL,
    .lseek              = cdio_generic_lseek,
    .read               = cdio_generic_read,
    .read_audio_sectors = _read_audio_sectors_freebsd,
    .read_mode2_sector  = _read_mode2_sector_freebsd,
    .read_mode2_sectors = _read_mode2_sectors_freebsd,
    .read_toc           = read_toc_freebsd,
    .run_scsi_mmc_cmd   = run_scsi_cmd_freebsd,
    .set_arg            = _set_arg_freebsd,
    .stat_size          = _stat_size_freebsd
  };

  _data                 = _cdio_malloc (sizeof (_img_private_t));
  _data->access_mode    = str_to_access_mode_freebsd(psz_access_mode);
  _data->gen.init       = false;
  _data->gen.fd         = -1;
  _data->gen.toc_init   = false;
  _data->gen.b_cdtext_init  = false;
  _data->gen.b_cdtext_error = false;

  if (NULL == psz_orig_source_name) {
    psz_source_name=cdio_get_default_device_freebsd();
    if (NULL == psz_source_name) return NULL;
    _data->device  = psz_source_name;
    _set_arg_freebsd(_data, "source", psz_source_name);
  } else {
    if (cdio_is_device_generic(psz_orig_source_name)) {
      _set_arg_freebsd(_data, "source", psz_orig_source_name);
      _data->device  = strdup(psz_orig_source_name);
    } else {
      /* The below would be okay if all device drivers worked this way. */
#if 0
      cdio_info ("source %s is a not a device", psz_orig_source_name);
#endif
      return NULL;
    }
  }
    
  ret = cdio_new ((void *)_data, &_funcs);
  if (ret == NULL) return NULL;

  if (cdio_generic_init(_data))
    if ( _data->access_mode == _AM_IOCTL ) {
      return ret;
    } else {
      if (init_freebsd_cam(_data)) 
	return ret;
      else {
	cdio_generic_free (_data);
	return NULL;
      }
    }
  else {
    cdio_generic_free (_data);
    return NULL;
  }
  
#else 
  return NULL;
#endif /* HAVE_FREEBSD_CDROM */

}

bool
cdio_have_freebsd (void)
{
#ifdef HAVE_FREEBSD_CDROM
  return true;
#else 
  return false;
#endif /* HAVE_FREEBSD_CDROM */
}