1 /*****************************************************************************
2 * dvd.c : DVD input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2001 VideoLAN
5 * $Id: dvd.c,v 1.21 2002/03/01 00:33:18 massiot Exp $
7 * Authors: Samuel Hocevar <sam@zoy.org>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
27 #include <stdlib.h> /* malloc(), free() */
28 #include <string.h> /* strdup() */
30 #include <videolan/vlc.h>
34 # include "dummy_dvdcss.h"
37 /*****************************************************************************
38 * Capabilities defined in the other files.
39 *****************************************************************************/
40 void _M( access_getfunctions )( function_list_t * p_function_list );
41 void _M( demux_getfunctions )( function_list_t * p_function_list );
43 /*****************************************************************************
45 *****************************************************************************/
47 static void *p_libdvdcss;
48 static void ProbeLibDVDCSS ( void );
49 static void UnprobeLibDVDCSS( void );
52 /*****************************************************************************
53 * Build configuration tree.
54 *****************************************************************************/
60 SET_DESCRIPTION( "DVD input module, uses libdvdcss if present" )
62 SET_DESCRIPTION( "DVD input module, linked with libdvdcss" )
64 ADD_CAPABILITY( ACCESS, 0 )
65 ADD_CAPABILITY( DEMUX, 0 )
70 _M( access_getfunctions )( &p_module->p_functions->access );
71 _M( demux_getfunctions )( &p_module->p_functions->demux );
77 MODULE_DEACTIVATE_START
81 MODULE_DEACTIVATE_STOP
84 /* Following functions are local */
87 /*****************************************************************************
88 * ProbeLibDVDCSS: look for a libdvdcss object.
89 *****************************************************************************
90 * This functions looks for libdvdcss, using dlopen(), and fills function
91 * pointers with what it finds. On failure, uses the dummy libdvdcss
92 * replacement provided by vlc.
93 *****************************************************************************/
94 static void ProbeLibDVDCSS( void )
96 char *pp_filelist[4] = { "libdvdcss.so.1",
98 "./lib/libdvdcss.so.1",
100 char **pp_file = pp_filelist;
102 /* Try to open the dynamic object */
105 p_libdvdcss = dlopen( *pp_file, RTLD_LAZY );
106 if( p_libdvdcss != NULL )
108 intf_WarnMsg( 2, "module: builtin module `dvd' found libdvdcss "
109 "in `%s'", *pp_file );
114 } while( *pp_file != NULL );
116 /* If libdvdcss.so was found, check that it's valid */
117 if( p_libdvdcss == NULL )
119 intf_ErrMsg( "dvd warning: libdvdcss.so.1 not present" );
123 ____dvdcss_open = dlsym( p_libdvdcss, "dvdcss_open" );
124 ____dvdcss_close = dlsym( p_libdvdcss, "dvdcss_close" );
125 ____dvdcss_title = dlsym( p_libdvdcss, "dvdcss_title" );
126 ____dvdcss_seek = dlsym( p_libdvdcss, "dvdcss_seek" );
127 ____dvdcss_read = dlsym( p_libdvdcss, "dvdcss_read" );
128 ____dvdcss_readv = dlsym( p_libdvdcss, "dvdcss_readv" );
129 ____dvdcss_error = dlsym( p_libdvdcss, "dvdcss_error" );
131 if( ____dvdcss_open == NULL || ____dvdcss_close == NULL
132 || ____dvdcss_title == NULL || ____dvdcss_seek == NULL
133 || ____dvdcss_read == NULL || ____dvdcss_readv == NULL
134 || ____dvdcss_error == NULL )
136 intf_ErrMsg( "dvd warning: missing symbols in libdvdcss.so.1, "
137 "this shouldn't happen !" );
138 dlclose( p_libdvdcss );
143 /* If libdvdcss was not found or was not valid, use the dummy
144 * replacement functions. */
145 if( p_libdvdcss == NULL )
147 intf_ErrMsg( "dvd warning: no valid libdvdcss found, "
148 "I will only play unencrypted DVDs" );
149 intf_ErrMsg( "dvd warning: get libdvdcss at "
150 "http://www.videolan.org/libdvdcss/" );
152 ____dvdcss_open = dummy_dvdcss_open;
153 ____dvdcss_close = dummy_dvdcss_close;
154 ____dvdcss_title = dummy_dvdcss_title;
155 ____dvdcss_seek = dummy_dvdcss_seek;
156 ____dvdcss_read = dummy_dvdcss_read;
157 ____dvdcss_readv = dummy_dvdcss_readv;
158 ____dvdcss_error = dummy_dvdcss_error;
162 /*****************************************************************************
163 * UnprobeLibDVDCSS: free resources allocated by ProbeLibDVDCSS, if any.
164 *****************************************************************************/
165 static void UnprobeLibDVDCSS( void )
167 if( p_libdvdcss != NULL )
169 dlclose( p_libdvdcss );