* Added a dummy libdvdcss so that the DVD plugin can be used without

[vlc] / plugins / dvd / dvd.c

diff --git a/plugins/dvd/dvd.c b/plugins/dvd/dvd.c
index 8f0ad2a2890bbf7ab1e2c477c57cb55f17ec3ce7..a1d9d0c220f0f200fdef240e0684d621195041c6 100644 (file)
--- a/plugins/dvd/dvd.c
+++ b/plugins/dvd/dvd.c
@@ -2,7 +2,7 @@
  * dvd.c : DVD input module for vlc
  *****************************************************************************
  * Copyright (C) 2000 VideoLAN
- * $Id: dvd.c,v 1.11 2001/07/27 01:05:17 sam Exp $
+ * $Id: dvd.c,v 1.12 2001/08/06 13:28:00 sam Exp $
  *
  * Authors: Samuel Hocevar <sam@zoy.org>
  *
@@ -32,11 +32,18 @@
 #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 "threads.h"
 #include "mtime.h"
 
+#include "intf_msg.h"
+
 #include "modules.h"
 #include "modules_export.h"
 
@@ -45,6 +52,15 @@
  *****************************************************************************/
 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.
  *****************************************************************************/
@@ -56,13 +72,124 @@ MODULE_CONFIG_STOP
 MODULE_INIT_START
     p_module->i_capabilities = MODULE_CAPABILITY_NULL
                                 | MODULE_CAPABILITY_INPUT;
-    p_module->psz_longname = "DVD input module, uses libdvdcss";
+#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" );
+
+        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
+