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Tags: upstream-0.7.2.final
Import upstream version 0.7.2.final

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plugins/dvd/dvd.c
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/*****************************************************************************
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 * dvd.c : DVD input module for vlc
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 *****************************************************************************
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 * Copyright (C) 2000-2001 VideoLAN
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 * $Id: dvd.c,v 1.15 2001/11/28 15:08:05 massiot Exp $
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 *
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 * Authors: Samuel Hocevar <sam@zoy.org>
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 * 
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
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 *****************************************************************************/
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24
 
#define MODULE_NAME dvd
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#include "modules_inner.h"
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27
 
/*****************************************************************************
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 * Preamble
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 *****************************************************************************/
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#include "defs.h"
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32
 
#include <stdlib.h>                                      /* malloc(), free() */
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#include <string.h>                                              /* strdup() */
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#ifdef GOD_DAMN_DMCA
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#   include <dlfcn.h>
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#   include "dummy_dvdcss.h"
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#endif
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40
 
#include "config.h"
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#include "common.h"                                     /* boolean_t, byte_t */
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#include "intf_msg.h"
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#include "threads.h"
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#include "mtime.h"
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46
 
#include "modules.h"
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#include "modules_export.h"
48
 
 
49
 
/*****************************************************************************
50
 
 * Capabilities defined in the other files.
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 *****************************************************************************/
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void _M( input_getfunctions )( function_list_t * p_function_list );
53
 
 
54
 
/*****************************************************************************
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 * Local prototypes.
56
 
 *****************************************************************************/
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#ifdef GOD_DAMN_DMCA
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static void *p_libdvdcss;
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static void ProbeLibDVDCSS  ( void );
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static void UnprobeLibDVDCSS( void );
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#endif
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/*****************************************************************************
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 * Build configuration tree.
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 *****************************************************************************/
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MODULE_CONFIG_START
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ADD_WINDOW( "Configuration for DVD module" )
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    ADD_COMMENT( "foobar !" )
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MODULE_CONFIG_STOP
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MODULE_INIT_START
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    p_module->i_capabilities = MODULE_CAPABILITY_NULL
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                                | MODULE_CAPABILITY_INPUT;
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#ifdef GOD_DAMN_DMCA
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    p_module->psz_longname = "DVD input module, uses libdvdcss if present";
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#else
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    p_module->psz_longname = "DVD input module, linked with libdvdcss";
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#endif
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MODULE_INIT_STOP
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MODULE_ACTIVATE_START
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    _M( input_getfunctions )( &p_module->p_functions->input );
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#ifdef GOD_DAMN_DMCA
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    ProbeLibDVDCSS();
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#endif
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MODULE_ACTIVATE_STOP
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MODULE_DEACTIVATE_START
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#ifdef GOD_DAMN_DMCA
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    UnprobeLibDVDCSS();
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#endif
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MODULE_DEACTIVATE_STOP
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/* Following functions are local */
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#ifdef GOD_DAMN_DMCA
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/*****************************************************************************
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 * ProbeLibDVDCSS: look for a libdvdcss object.
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 *****************************************************************************
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 * This functions looks for libdvdcss, using dlopen(), and fills function
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 * pointers with what it finds. On failure, uses the dummy libdvdcss
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 * replacement provided by vlc.
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 *****************************************************************************/
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static void ProbeLibDVDCSS( void )
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{
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    char *pp_filelist[4] = { "libdvdcss.so.1",
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                             "./libdvdcss.so.1",
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                             "./lib/libdvdcss.so.1",
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                             NULL };
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    char **pp_file = pp_filelist;
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    /* Try to open the dynamic object */
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    do
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    {
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        p_libdvdcss = dlopen( *pp_file, RTLD_LAZY );
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        if( p_libdvdcss != NULL )
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        {
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            intf_WarnMsg( 2, "module: builtin module `dvd' found libdvdcss "
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                             "in `%s'", *pp_file );
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            break;
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        }
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        pp_file++;
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    } while( *pp_file != NULL );
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    /* If libdvdcss.so was found, check that it's valid */
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    if( p_libdvdcss == NULL )
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    {
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        intf_ErrMsg( "dvd warning: libdvdcss.so.1 not present" );
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    }
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    else
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    {
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        dvdcss_open = dlsym( p_libdvdcss, "dvdcss_open" );
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        dvdcss_close = dlsym( p_libdvdcss, "dvdcss_close" );
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        dvdcss_title = dlsym( p_libdvdcss, "dvdcss_title" );
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        dvdcss_seek = dlsym( p_libdvdcss, "dvdcss_seek" );
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        dvdcss_read = dlsym( p_libdvdcss, "dvdcss_read" );
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        dvdcss_readv = dlsym( p_libdvdcss, "dvdcss_readv" );
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        dvdcss_error = dlsym( p_libdvdcss, "dvdcss_error" );
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        if( dvdcss_open == NULL || dvdcss_close == NULL
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             || dvdcss_title == NULL || dvdcss_seek == NULL
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             || dvdcss_read == NULL || dvdcss_readv == NULL
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             || dvdcss_error == NULL )
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        {
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            intf_ErrMsg( "dvd warning: missing symbols in libdvdcss.so.1, "
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                         "this shouldn't happen !" );
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            dlclose( p_libdvdcss );
150
 
            p_libdvdcss = NULL;
151
 
        }
152
 
    }
153
 
 
154
 
    /* If libdvdcss was not found or was not valid, use the dummy
155
 
     * replacement functions. */
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    if( p_libdvdcss == NULL )
157
 
    {
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        intf_ErrMsg( "dvd warning: no valid libdvdcss found, "
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                     "I will only play unencrypted DVDs" );
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        intf_ErrMsg( "dvd warning: get libdvdcss at "
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                     "http://www.videolan.org/libdvdcss/" );
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163
 
        dvdcss_open = dummy_dvdcss_open;
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        dvdcss_close = dummy_dvdcss_close;
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        dvdcss_title = dummy_dvdcss_title;
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        dvdcss_seek = dummy_dvdcss_seek;
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        dvdcss_read = dummy_dvdcss_read;
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        dvdcss_readv = dummy_dvdcss_readv;
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        dvdcss_error = dummy_dvdcss_error;
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    }
171
 
}
172
 
 
173
 
/*****************************************************************************
174
 
 * UnprobeLibDVDCSS: free resources allocated by ProbeLibDVDCSS, if any.
175
 
 *****************************************************************************/
176
 
static void UnprobeLibDVDCSS( void )
177
 
{
178
 
    if( p_libdvdcss != NULL )
179
 
    {
180
 
        dlclose( p_libdvdcss );
181
 
        p_libdvdcss = NULL;
182
 
    }
183
 
}
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#endif
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