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/*****************************************************************************
* dvdread.c : DvdRead input module for vlc
*****************************************************************************
* Copyright (C) 2001 VideoLAN
* $Id: dvdread.c,v 1.2 2001/11/28 15:08:05 massiot Exp $
*
* Authors: Samuel Hocevar <sam@zoy.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, USA.
*****************************************************************************/
#define MODULE_NAME dvdread
#include "modules_inner.h"
/*****************************************************************************
* Preamble
*****************************************************************************/
#include "defs.h"
#include <stdlib.h> /* malloc(), free() */
#include <string.h> /* strdup() */
#ifdef GOD_DAMN_DMCA
# include <dlfcn.h>
# include "dummy_dvdcss.h"
#endif
#include "config.h"
#include "common.h" /* boolean_t, byte_t */
#include "intf_msg.h"
#include "threads.h"
#include "mtime.h"
#include "modules.h"
#include "modules_export.h"
/*****************************************************************************
* Capabilities defined in the other files.
*****************************************************************************/
void _M( input_getfunctions )( function_list_t * p_function_list );
/*****************************************************************************
* Local prototypes.
*****************************************************************************/
#ifdef GOD_DAMN_DMCA
static void *p_libdvdcss;
static void ProbeLibDVDCSS ( void );
static void UnprobeLibDVDCSS( void );
#endif
/*****************************************************************************
* Build configuration tree.
*****************************************************************************/
MODULE_CONFIG_START
ADD_WINDOW( "Configuration for DVD module" )
ADD_COMMENT( "foobar !" )
MODULE_CONFIG_STOP
MODULE_INIT_START
p_module->i_capabilities = MODULE_CAPABILITY_NULL
| MODULE_CAPABILITY_INPUT;
#ifdef GOD_DAMN_DMCA
p_module->psz_longname = "DVD input module, uses libdvdcss if present";
#else
p_module->psz_longname = "DVD input module, linked with libdvdcss";
#endif
MODULE_INIT_STOP
MODULE_ACTIVATE_START
_M( input_getfunctions )( &p_module->p_functions->input );
#ifdef GOD_DAMN_DMCA
ProbeLibDVDCSS();
#endif
MODULE_ACTIVATE_STOP
MODULE_DEACTIVATE_START
#ifdef GOD_DAMN_DMCA
UnprobeLibDVDCSS();
#endif
MODULE_DEACTIVATE_STOP
/* Following functions are local */
#ifdef GOD_DAMN_DMCA
/*****************************************************************************
* ProbeLibDVDCSS: look for a libdvdcss object.
*****************************************************************************
* This functions looks for libdvdcss, using dlopen(), and fills function
* pointers with what it finds. On failure, uses the dummy libdvdcss
* replacement provided by vlc.
*****************************************************************************/
static void ProbeLibDVDCSS( void )
{
char *pp_filelist[4] = { "libdvdcss.so.0",
"./libdvdcss.so.0",
"./lib/libdvdcss.so.0",
NULL };
char **pp_file = pp_filelist;
/* Try to open the dynamic object */
do
{
p_libdvdcss = dlopen( *pp_file, RTLD_LAZY );
if( p_libdvdcss != NULL )
{
intf_WarnMsg( 2, "module: builtin module `dvd' found libdvdcss "
"in `%s'", *pp_file );
break;
}
pp_file++;
} while( *pp_file != NULL );
/* If libdvdcss.so was found, check that it's valid */
if( p_libdvdcss == NULL )
{
intf_ErrMsg( "dvd warning: libdvdcss.so.0 not present" );
}
else
{
/* Check for libdvdcss 0.0.1 */
if( dlsym( p_libdvdcss, "dvdcss_crack" ) != NULL )
{
intf_ErrMsg( "dvd warning: libdvdcss.so.0 has deprecated symbol "
"dvdcss_crack(), please upgrade" );
dlclose( p_libdvdcss );
p_libdvdcss = NULL;
}
else
{
dvdcss_open = dlsym( p_libdvdcss, "dvdcss_open" );
dvdcss_close = dlsym( p_libdvdcss, "dvdcss_close" );
dvdcss_title = dlsym( p_libdvdcss, "dvdcss_title" );
dvdcss_seek = dlsym( p_libdvdcss, "dvdcss_seek" );
dvdcss_read = dlsym( p_libdvdcss, "dvdcss_read" );
dvdcss_readv = dlsym( p_libdvdcss, "dvdcss_readv" );
dvdcss_error = dlsym( p_libdvdcss, "dvdcss_error" );
if( dvdcss_open == NULL || dvdcss_close == NULL
|| dvdcss_title == NULL || dvdcss_seek == NULL
|| dvdcss_read == NULL || dvdcss_readv == NULL
|| dvdcss_error == NULL )
{
intf_ErrMsg( "dvd warning: missing symbols in libdvdcss.so.0, "
"please upgrade libdvdcss or vlc" );
dlclose( p_libdvdcss );
p_libdvdcss = NULL;
}
}
}
/* If libdvdcss was not found or was not valid, use the dummy
* replacement functions. */
if( p_libdvdcss == NULL )
{
intf_ErrMsg( "dvd warning: no valid libdvdcss found, "
"I will only play unencrypted DVDs" );
intf_ErrMsg( "dvd warning: get libdvdcss at "
"http://www.videolan.org/libdvdcss/" );
dvdcss_open = dummy_dvdcss_open;
dvdcss_close = dummy_dvdcss_close;
dvdcss_title = dummy_dvdcss_title;
dvdcss_seek = dummy_dvdcss_seek;
dvdcss_read = dummy_dvdcss_read;
dvdcss_readv = dummy_dvdcss_readv;
dvdcss_error = dummy_dvdcss_error;
}
}
/*****************************************************************************
* UnprobeLibDVDCSS: free resources allocated by ProbeLibDVDCSS, if any.
*****************************************************************************/
static void UnprobeLibDVDCSS( void )
{
if( p_libdvdcss != NULL )
{
dlclose( p_libdvdcss );
p_libdvdcss = NULL;
}
}
#endif
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