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/****************************************************************************
* linux_cdrom_tools.c: linux cdrom tools
*****************************************************************************
* Copyright (C) 1998-2001 VideoLAN
*
* Author: Johan Bilien <jobi@via.ecp.fr>
*
* 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, USA.
*****************************************************************************/
/*****************************************************************************
* Functions declared in this file use lots of ioctl calls, thus they are
* Linux-specific.
****************************************************************************/
#include "defs.h"
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <sys/types.h>
#include <string.h>
#include <errno.h>
#ifdef STRNCASECMP_IN_STRINGS_H
# include <strings.h>
#endif
#if defined( WIN32 )
# include <io.h> /* read() */
#else
# include <sys/uio.h> /* struct iovec */
#endif
#include <sys/ioctl.h>
#include "common.h"
#include "intf_msg.h"
#include "threads.h"
#include "mtime.h"
#include "tests.h"
#if defined( WIN32 )
# include "input_iovec.h"
#endif
#include "stream_control.h"
#include "input_ext-intf.h"
#include "input_ext-dec.h"
#include "input_ext-plugins.h"
#include "debug.h"
#include "modules.h"
#include "modules_export.h"
#include "linux_cdrom_tools.h"
/*****************************************************************************
* ioctl_ReadTocHeader: Read the TOC header and return the track number.
*****************************************************************************/
int ioctl_GetTrackCount( int i_fd )
{
struct cdrom_tochdr tochdr;
/* First we read the TOC header */
if( ioctl( i_fd, CDROMREADTOCHDR, &tochdr ) == -1 )
{
intf_ErrMsg( "vcd error: could not read TOCHDR" );
return -1;
}
return tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
}
/*****************************************************************************
* ioctl_GetSectors: Read the Table of Contents and fill p_vcd.
*****************************************************************************/
int * ioctl_GetSectors( int i_fd )
{
int i, i_tracks;
int *p_sectors;
struct cdrom_tochdr tochdr;
struct cdrom_tocentry tocent;
/* First we read the TOC header */
if( ioctl( i_fd, CDROMREADTOCHDR, &tochdr ) == -1 )
{
intf_ErrMsg( "vcd error: could not read TOCHDR" );
return NULL;
}
i_tracks = tochdr.cdth_trk1 - tochdr.cdth_trk0 + 1;
p_sectors = malloc( (i_tracks + 1) * sizeof(int) );
if( p_sectors == NULL )
{
intf_ErrMsg( "vcd error: could not allocate p_sectors" );
return NULL;
}
/* Fill the p_sectors structure with the track/sector matches */
for( i = 0 ; i <= i_tracks ; i++ )
{
tocent.cdte_format = CDROM_LBA;
tocent.cdte_track =
( i == i_tracks ) ? CDROM_LEADOUT : tochdr.cdth_trk0 + i;
if( ioctl( i_fd, CDROMREADTOCENTRY, &tocent ) == -1 )
{
intf_ErrMsg( "vcd error: could not read TOCENTRY" );
free( p_sectors );
return NULL;
}
p_sectors[ i ] = tocent.cdte_addr.lba;
}
return p_sectors;
}
/****************************************************************************
* ioctl_ReadSector: Read a sector (2324 bytes)
****************************************************************************/
int ioctl_ReadSector( int i_fd, int i_sector, byte_t * p_buffer )
{
byte_t p_block[ VCD_SECTOR_SIZE ];
int i_dummy = i_sector + 2 * CD_FRAMES;
#define p_msf ((struct cdrom_msf0 *)p_block)
p_msf->minute = i_dummy / (CD_FRAMES * CD_SECS);
p_msf->second = ( i_dummy % (CD_FRAMES * CD_SECS) ) / CD_FRAMES;
p_msf->frame = ( i_dummy % (CD_FRAMES * CD_SECS) ) % CD_FRAMES;
intf_DbgMsg( "vcd debug: playing frame %d:%d-%d",
p_msf->minute, p_msf->second, p_msf->frame);
#undef p_msf
if( ioctl(i_fd, CDROMREADRAW, p_block) == -1 )
{
intf_ErrMsg( "vcd error: could not read block %i from disc",
i_sector );
return -1;
}
/* We don't want to keep the header of the read sector */
p_main->fast_memcpy( p_buffer, p_block + VCD_DATA_START, VCD_DATA_SIZE );
return 0;
}
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