freebsd.c

linux下的MPEG1

/*
    $Id: freebsd.c,v 1.1 2005/01/01 02:43:57 rockyb Exp $

    Copyright (C) 2003, 2004 Rocky Bernstein <[e-mail]>

    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
*/

/* This file contains FreeBSD-specific code and implements low-level
   control of the CD drive. Culled initially I think from xine's or
   mplayer's FreeBSD code with lots of modifications.
*/

#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

static const char _rcsid[] = "$Id: freebsd.c,v 1.1 2005/01/01 02:43:57 rockyb Exp $";

#include "freebsd.h"

#ifdef HAVE_FREEBSD_CDROM

#include <cdio/sector.h>

static access_mode_t 
str_to_access_mode_freebsd(const char *psz_access_mode) 
{
  const access_mode_t default_access_mode = DEFAULT_FREEBSD_AM;

  if (NULL==psz_access_mode) return default_access_mode;
  
  if (!strcmp(psz_access_mode, "ioctl"))
    return _AM_IOCTL;
  else if (!strcmp(psz_access_mode, "CAM"))
    return _AM_CAM;
  else {
    cdio_warn ("unknown access type: %s. Default ioctl used.", 
	       psz_access_mode);
    return default_access_mode;
  }
}

static void
_free_freebsd (void *obj)
{
  _img_private_t *env = obj;

  if (NULL == env) return;

  if (NULL != env->device) free(env->device);

  if (_AM_CAM == env->access_mode) 
    return free_freebsd_cam(env);
  else 
    return cdio_generic_free(obj);
}

/* Check a drive to see if it is a CD-ROM 
   Return 1 if a CD-ROM. 0 if it exists but isn't a CD-ROM drive
   and -1 if no device exists .
*/
static bool
cdio_is_cdrom(char *drive, char *mnttype)
{
  return cdio_is_cdrom_freebsd_ioctl(drive, mnttype);
}

/*!
   Reads nblocks of audio sectors from cd device into data starting from lsn.
   Returns 0 if no error. 
 */
static int
_read_audio_sectors_freebsd (void *user_data, void *data, lsn_t lsn,
			     unsigned int nblocks)
{
  return read_audio_sectors_freebsd_ioctl(user_data, data, lsn, nblocks);
}

/*!
   Reads a single mode2 sector from cd device into data starting
   from lsn. Returns 0 if no error. 
 */
static int
_read_mode2_sector_freebsd (void *user_data, void *data, lsn_t lsn, 
			    bool b_form2)
{
  _img_private_t *env = user_data;

  if ( env->access_mode == _AM_CAM )
    return read_mode2_sector_freebsd_cam(env, data, lsn, b_form2);
  else
    return read_mode2_sector_freebsd_ioctl(env, data, lsn, b_form2);
}

/*!
   Reads nblocks of mode2 sectors from cd device into data starting
   from lsn.
   Returns 0 if no error. 
 */
static int
_read_mode2_sectors_freebsd (void *user_data, void *data, lsn_t lsn, 
			  bool b_form2, unsigned int nblocks)
{
  _img_private_t *env = user_data;

  if ( env->access_mode == _AM_CAM  && b_form2) {
    /* We have a routine that covers this case without looping. */
    return read_mode2_sectors_freebsd_cam(env, data, lsn, nblocks);
  } else {
    unsigned int i;
    unsigned int i_blocksize = b_form2 ? M2RAW_SECTOR_SIZE : CDIO_CD_FRAMESIZE;
  
    /* For each frame, pick out the data part we need */
    for (i = 0; i < nblocks; i++) {
      int retval = _read_mode2_sector_freebsd (env, 
					       ((char *)data) + 
					       (i_blocksize * i),
					       lsn + i, b_form2);
      if (retval) return retval;
    }
  }
  return 0;
}

/*!
   Return the size of the CD in logical block address (LBA) units.
 */
static uint32_t 
_stat_size_freebsd (void *obj)
{
  _img_private_t *env = obj;

  if (NULL == env) return CDIO_INVALID_LBA;

  if (_AM_CAM == env->access_mode) 
    return stat_size_freebsd_cam(env);
  else 
    return stat_size_freebsd_ioctl(env);
}

/*!
  Set the key "arg" to "value" in source device.
*/
static int
_set_arg_freebsd (void *user_data, const char key[], const char value[])
{
  _img_private_t *env = user_data;

  if (!strcmp (key, "source"))
    {
      if (!value)
	return -2;

      free (env->gen.source_name);
      
      env->gen.source_name = strdup (value);
    }
  else if (!strcmp (key, "access-mode"))
    {
      env->access_mode = str_to_access_mode_freebsd(value);
      if (env->access_mode == _AM_CAM && !env->b_cam_init) 
	return init_freebsd_cam(env) ? 1 : -3;
      return 0;
    }
  else 
    return -1;

  return 0;
}

/*! 
  Read and cache the CD's Track Table of Contents and track info.
  Return false if unsuccessful;
*/
static bool
read_toc_freebsd (void *p_user_data) 
{
  _img_private_t *p_env = p_user_data;
  track_t i, j;

  /* read TOC header */
  if ( ioctl(p_env->gen.fd, CDIOREADTOCHEADER, &p_env->tochdr) == -1 ) {
    cdio_warn("error in ioctl(CDIOREADTOCHEADER): %s\n", strerror(errno));
    return false;
  }

  p_env->gen.i_first_track = p_env->tochdr.starting_track;
  p_env->gen.i_tracks      = p_env->tochdr.ending_track - 
    p_env->gen.i_first_track + 1;

  j=0;
  for (i=p_env->gen.i_first_track; i<=p_env->gen.i_tracks; i++, j++) {
    p_env->tocent[j].track = i;
    p_env->tocent[j].address_format = CD_LBA_FORMAT;

    if ( ioctl(p_env->gen.fd, CDIOREADTOCENTRY, &(p_env->tocent[j]) ) ) {
      cdio_warn("%s %d: %s\n",
		 "error in ioctl CDROMREADTOCENTRY for track", 
		 i, strerror(errno));
      return false;
    }
  }

  p_env->tocent[j].track          = CDIO_CDROM_LEADOUT_TRACK;
  p_env->tocent[j].address_format = CD_LBA_FORMAT;
  if ( ioctl(p_env->gen.fd, CDIOREADTOCENTRY, &(p_env->tocent[j]) ) ){
    cdio_warn("%s: %s\n",
	       "error in ioctl CDROMREADTOCENTRY for leadout track", 
	       strerror(errno));
    return false;
  }

  p_env->gen.toc_init = true;
  return true;
}

/*!
  Eject media. Return 1 if successful, 0 otherwise.
 */
static int 
_eject_media_freebsd (void *user_data) 
{
  _img_private_t *p_env = user_data;

  return (p_env->access_mode == _AM_IOCTL) 
    ? eject_media_freebsd_ioctl(p_env) 
    : eject_media_freebsd_cam(p_env);
}

/*!
  Return the value associated with the key "arg".
*/
static const char *
_get_arg_freebsd (void *user_data, const char key[])
{
  _img_private_t *env = user_data;

  if (!strcmp (key, "source")) {
    return env->gen.source_name;
  } else if (!strcmp (key, "access-mode")) {
    switch (env->access_mode) {
    case _AM_IOCTL:
      return "ioctl";
    case _AM_CAM:
      return "CAM";
    case _AM_NONE:
      return "no access method";
    }
  } 
  return NULL;
}

/*!
  Return the media catalog number MCN.

  Note: string is malloc'd so caller should free() then returned
  string when done with it.

  FIXME: This is just a guess. 

 */
static char *
_get_mcn_freebsd (const void *p_user_data) {

  const _img_private_t *p_env = p_user_data;

  return (p_env->access_mode == _AM_IOCTL) 
    ? get_mcn_freebsd_ioctl(p_env) 
    : scsi_mmc_get_mcn(p_env->gen.cdio);

}

static void
get_drive_cap_freebsd (const void *p_user_data,
		       cdio_drive_read_cap_t  *p_read_cap,
		       cdio_drive_write_cap_t *p_write_cap,
		       cdio_drive_misc_cap_t  *p_misc_cap) 
{
  const _img_private_t *p_env = p_user_data;

  if (p_env->access_mode == _AM_CAM) 
    scsi_mmc_get_drive_cap_generic (p_user_data, p_read_cap, p_write_cap, 
				    p_misc_cap);
  
}  

/*!
  Run a SCSI MMC command. 
 
  p_user_data   internal CD structure.
  i_timeout_ms  time in milliseconds we will wait for the command
                to complete. If this value is -1, use the default 
		time-out value.
  i_cdb	        Size of p_cdb
  p_cdb	        CDB bytes. 
  e_direction	direction the transfer is to go.
  i_buf	        Size of buffer
  p_buf	        Buffer for data, both sending and receiving

  Return 0 if no error.
 */
static int
run_scsi_cmd_freebsd( const void *p_user_data, unsigned int i_timeout_ms,
		     unsigned int i_cdb, const scsi_mmc_cdb_t *p_cdb, 
		     scsi_mmc_direction_t e_direction, 
		     unsigned int i_buf, /*in/out*/ void *p_buf ) 
{