/*
$Id: _cdio_generic.c,v 1.20 2005/05/16 08:11:31 rocky Exp $
Copyright (C) 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
*/
/* This file contains generic implementations of device-dirver routines.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
static const char _rcsid[] = "$Id: _cdio_generic.c,v 1.20 2005/05/16 08:11:31 rocky Exp $";
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /*HAVE_UNISTD_H*/
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <cdio/sector.h>
#include <cdio/util.h>
#include <cdio/logging.h>
#include "cdio_assert.h"
#include "cdio_private.h"
#include "_cdio_stdio.h"
#include "portable.h"
/*!
Eject media -- there's nothing to do here. We always return -2.
Should we also free resources?
*/
int
cdio_generic_unimplemented_eject_media (void *p_user_data) {
/* Sort of a stub here. Perhaps log a message? */
return DRIVER_OP_UNSUPPORTED;
}
/*!
Set the blocksize for subsequent reads.
*/
int
cdio_generic_unimplemented_set_blocksize (void *p_user_data,
uint16_t i_blocksize) {
/* Sort of a stub here. Perhaps log a message? */
return DRIVER_OP_UNSUPPORTED;
}
/*!
Set the drive speed.
*/
int
cdio_generic_unimplemented_set_speed (void *p_user_data, int i_speed) {
/* Sort of a stub here. Perhaps log a message? */
return DRIVER_OP_UNSUPPORTED;
}
/*!
Release and free resources associated with cd.
*/
void
cdio_generic_free (void *p_user_data)
{
generic_img_private_t *p_env = p_user_data;
track_t i_track;
if (NULL == p_env) return;
if (p_env->source_name) free (p_env->source_name);
for (i_track=0; i_track < p_env->i_tracks; i_track++) {
cdtext_destroy(&(p_env->cdtext_track[i_track]));
}
if (p_env->fd >= 0)
close (p_env->fd);
free (p_env);
}
/*!
Initialize CD device.
*/
bool
cdio_generic_init (void *user_data, int open_flags)
{
generic_img_private_t *p_env = user_data;
if (p_env->init) {
cdio_warn ("init called more than once");
return false;
}
p_env->fd = open (p_env->source_name, open_flags, 0);
if (p_env->fd < 0)
{
cdio_warn ("open (%s): %s", p_env->source_name, strerror (errno));
return false;
}
p_env->init = true;
p_env->toc_init = false;
p_env->b_cdtext_init = false;
p_env->b_cdtext_error = false;
p_env->i_joliet_level = 0; /* Assume no Joliet extensions initally */
return true;
}
/*!
Reads a single form1 sector from cd device into data starting
from lsn.
*/
driver_return_code_t
cdio_generic_read_form1_sector (void * user_data, void *data, lsn_t lsn)
{
if (0 > cdio_generic_lseek(user_data, CDIO_CD_FRAMESIZE*lsn, SEEK_SET))
return DRIVER_OP_ERROR;
return cdio_generic_read(user_data, data, CDIO_CD_FRAMESIZE);
}
/*!
Reads into buf the next size bytes.
Returns -1 on error.
Is in fact libc's lseek().
*/
off_t
cdio_generic_lseek (void *user_data, off_t offset, int whence)
{
generic_img_private_t *p_env = user_data;
return lseek(p_env->fd, offset, whence);
}
/*!
Reads into buf the next size bytes.
Returns -1 on error.
Is in fact libc's read().
*/
ssize_t
cdio_generic_read (void *user_data, void *buf, size_t size)
{
generic_img_private_t *p_env = user_data;
return read(p_env->fd, buf, size);
}
/*!
Release and free resources associated with stream or disk image.
*/
void
cdio_generic_stdio_free (void *p_user_data)
{
generic_img_private_t *p_env = p_user_data;
if (NULL == p_env) return;
if (NULL != p_env->source_name)
free (p_env->source_name);
if (p_env->data_source)
cdio_stdio_destroy (p_env->data_source);
}
/*!
Return true if source_name could be a device containing a CD-ROM.
*/
bool
cdio_is_device_generic(const char *source_name)
{
struct stat buf;
if (0 != stat(source_name, &buf)) {
cdio_warn ("Can't get file status for %s:\n%s", source_name,
strerror(errno));
return false;
}
return (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode));
}
/*!
Like above, but don't give a warning device doesn't exist.
*/
bool
cdio_is_device_quiet_generic(const char *source_name)
{
struct stat buf;
if (0 != stat(source_name, &buf)) {
return false;
}
return (S_ISBLK(buf.st_mode) || S_ISCHR(buf.st_mode));
}
/*!
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 *drive,
unsigned int *num_drives)
{
if (NULL != drive) {
unsigned int j;
/* Check if drive is already in list. */
for (j=0; j<*num_drives; j++) {
if (strcmp((*device_list)[j], drive) == 0) break;
}
if (j==*num_drives) {
/* Drive not in list. Add it. */
(*num_drives)++;
if (*device_list) {
*device_list = realloc(*device_list, (*num_drives) * sizeof(char *));
} else {
/* num_drives should be 0. Add assert? */
*device_list = malloc((*num_drives) * sizeof(char *));
}
(*device_list)[*num_drives-1] = strdup(drive);
}
} else {
(*num_drives)++;
if (*device_list) {
*device_list = realloc(*device_list, (*num_drives) * sizeof(char *));
} else {
*device_list = malloc((*num_drives) * sizeof(char *));
}
(*device_list)[*num_drives-1] = NULL;
}
}
/*!
Get cdtext information for a CdIo_t 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.
*/
cdtext_t *
get_cdtext_generic (void *p_user_data, track_t i_track)
{
generic_img_private_t *p_env = p_user_data;
if (!p_env) return NULL;
if (!p_env->toc_init)
p_env->cdio->op.read_toc (p_user_data);
if ( (0 != i_track
&& i_track >= p_env->i_tracks+p_env->i_first_track ) )
return NULL;
if (!p_env->b_cdtext_init)
init_cdtext_generic(p_env);
if (!p_env->b_cdtext_init) return NULL;
if (0 == i_track)
return &(p_env->cdtext);
else
return &(p_env->cdtext_track[i_track-p_env->i_first_track]);
}
/*!
Get disc type associated with cd object.
*/
discmode_t
get_discmode_generic (void *p_user_data )
{
generic_img_private_t *p_env = p_user_data;
/* See if this is a DVD. */
cdio_dvd_struct_t dvd; /* DVD READ STRUCT for layer 0. */
dvd.physical.type = CDIO_DVD_STRUCT_PHYSICAL;
dvd.physical.layer_num = 0;
if (0 == mmc_get_dvd_struct_physical (p_env->cdio, &dvd)) {
switch(dvd.physical.layer[0].book_type) {
case CDIO_DVD_BOOK_DVD_ROM: return CDIO_DISC_MODE_DVD_ROM;
case CDIO_DVD_BOOK_DVD_RAM: return CDIO_DISC_MODE_DVD_RAM;
case CDIO_DVD_BOOK_DVD_R: return CDIO_DISC_MODE_DVD_R;
case CDIO_DVD_BOOK_DVD_RW: return CDIO_DISC_MODE_DVD_RW;
case CDIO_DVD_BOOK_DVD_PR: return CDIO_DISC_MODE_DVD_PR;
case CDIO_DVD_BOOK_DVD_PRW: return CDIO_DISC_MODE_DVD_PRW;
default: return CDIO_DISC_MODE_DVD_OTHER;
}
}
return get_discmode_cd_generic(p_user_data);
}
/*!
Get disc type associated with cd object.
*/
discmode_t
get_discmode_cd_generic (void *p_user_data )
{
generic_img_private_t *p_env = p_user_data;
track_t i_track;
discmode_t discmode=CDIO_DISC_MODE_NO_INFO;
if (!p_env->toc_init)
p_env->cdio->op.read_toc (p_user_data);
if (!p_env->toc_init)
return CDIO_DISC_MODE_NO_INFO;
for (i_track = p_env->i_first_track;
i_track < p_env->i_first_track + p_env->i_tracks ;
i_track ++) {
track_format_t track_fmt =
p_env->cdio->op.get_track_format(p_env, i_track);
switch(track_fmt) {
case TRACK_FORMAT_AUDIO:
switch(discmode) {
case CDIO_DISC_MODE_NO_INFO:
discmode = CDIO_DISC_MODE_CD_DA;
break;
case CDIO_DISC_MODE_CD_DA:
case CDIO_DISC_MODE_CD_MIXED:
case CDIO_DISC_MODE_ERROR:
/* No change*/
break;
default:
discmode = CDIO_DISC_MODE_CD_MIXED;
}
break;
case TRACK_FORMAT_XA:
switch(discmode) {
case CDIO_DISC_MODE_NO_INFO:
discmode = CDIO_DISC_MODE_CD_XA;
break;
case CDIO_DISC_MODE_CD_XA:
case CDIO_DISC_MODE_CD_MIXED:
case CDIO_DISC_MODE_ERROR:
/* No change*/
break;
default:
discmode = CDIO_DISC_MODE_CD_MIXED;
}
break;
case TRACK_FORMAT_CDI:
case TRACK_FORMAT_DATA:
switch(discmode) {
case CDIO_DISC_MODE_NO_INFO:
discmode = CDIO_DISC_MODE_CD_DATA;
break;
case CDIO_DISC_MODE_CD_DATA:
case CDIO_DISC_MODE_CD_MIXED:
case CDIO_DISC_MODE_ERROR:
/* No change*/
break;
default:
discmode = CDIO_DISC_MODE_CD_MIXED;
}
break;
case TRACK_FORMAT_ERROR:
default:
discmode = CDIO_DISC_MODE_ERROR;
}
}
return discmode;
}
/*!
Return the number of of the first track.
CDIO_INVALID_TRACK is returned on error.
*/
track_t
get_first_track_num_generic(void *p_user_data)
{
const generic_img_private_t *p_env = p_user_data;
if (!p_env->toc_init)
p_env->cdio->op.read_toc (p_user_data);
return p_env->toc_init ? p_env->i_first_track : CDIO_INVALID_TRACK;
}
/*!
Return the number of tracks in the current medium.
*/
track_t
get_num_tracks_generic(void *p_user_data)
{
generic_img_private_t *p_env = p_user_data;
if (!p_env->toc_init)
p_env->cdio->op.read_toc (p_user_data);
return p_env->toc_init ? p_env->i_tracks : CDIO_INVALID_TRACK;
}
void
set_cdtext_field_generic(void *p_user_data, track_t i_track,
track_t i_first_track,
cdtext_field_t e_field, const char *psz_value)
{
char **pp_field;
generic_img_private_t *p_env = p_user_data;
if( i_track == 0 )
pp_field = &(p_env->cdtext.field[e_field]);
else
pp_field = &(p_env->cdtext_track[i_track-i_first_track].field[e_field]);
if (*pp_field) free(*pp_field);
*pp_field = (psz_value) ? strdup(psz_value) : NULL;
}
/*!
Read CD-Text information for a CdIo_t object .
return true on success, false on error or CD-Text information does
not exist.
*/
bool
init_cdtext_generic (generic_img_private_t *p_env)
{
return mmc_init_cdtext_private( p_env,
p_env->cdio->op.run_mmc_cmd,
set_cdtext_field_generic
);
}
/*! 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_generic(const void *p_user_data, track_t i_track)
{
const generic_img_private_t *p_env = p_user_data;
return p_env->track_flags[i_track].channels;
}
/*! Return 1 if copy is permitted on the track, 0 if not, or -1 for error.
Is this meaningful if not an audio track?
*/
track_flag_t
get_track_copy_permit_generic(void *p_user_data, track_t i_track)
{
const generic_img_private_t *p_env = p_user_data;
return p_env->track_flags[i_track].copy_permit;
}
/*! Return 1 if track has pre-emphasis, 0 if not, or -1 for error.
Is this meaningful if not an audio track?
pre-emphasis is a non linear frequency response.
*/
track_flag_t
get_track_preemphasis_generic(const void *p_user_data, track_t i_track)
{
const generic_img_private_t *p_env = p_user_data;
return p_env->track_flags[i_track].preemphasis;
}
void
set_track_flags(track_flags_t *p_track_flag, uint8_t i_flag)
{
p_track_flag->preemphasis = ( i_flag & CDIO_TRACK_FLAG_PRE_EMPHASIS )
? CDIO_TRACK_FLAG_TRUE : CDIO_TRACK_FLAG_FALSE;
p_track_flag->copy_permit = ( i_flag & CDIO_TRACK_FLAG_COPY_PERMITTED )
? CDIO_TRACK_FLAG_TRUE : CDIO_TRACK_FLAG_FALSE;
p_track_flag->channels = ( i_flag & CDIO_TRACK_FLAG_FOUR_CHANNEL_AUDIO )
? 4 : 2;
}
driver_return_code_t
read_data_sectors_generic (void *p_user_data, void *p_buf, lsn_t i_lsn,
uint16_t i_blocksize, uint32_t i_blocks)
{
int rc;
if (0 > cdio_generic_lseek(p_user_data, i_blocksize*i_lsn, SEEK_SET))
return DRIVER_OP_ERROR;
rc = cdio_generic_read(p_user_data, p_buf, i_blocksize*i_blocks);
if (rc > 0) return DRIVER_OP_SUCCESS;
return DRIVER_OP_ERROR;
}
/*
* Local variables:
* c-file-style: "gnu"
* tab-width: 8
* indent-tabs-mode: nil
* End:
*/
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