1 /*****************************************************************************
2 * modules.c : Builtin and plugin modules management functions
3 *****************************************************************************
4 * Copyright (C) 2001 VideoLAN
5 * $Id: modules.c,v 1.136 2003/10/05 21:29:23 sam Exp $
7 * Authors: Sam Hocevar <sam@zoy.org>
8 * Ethan C. Baldridge <BaldridgeE@cadmus.com>
9 * Hans-Peter Jansen <hpj@urpla.net>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
24 *****************************************************************************/
26 /* Some faulty libcs have a broken struct dirent when _FILE_OFFSET_BITS
27 * is set to 64. Don't try to be cleverer. */
28 #ifdef _FILE_OFFSET_BITS
29 #undef _FILE_OFFSET_BITS
32 #include <stdlib.h> /* free(), strtol() */
33 #include <stdio.h> /* sprintf() */
34 #include <string.h> /* strdup() */
40 #elif defined( UNDER_CE )
41 # include <windows.h> /* GetFileAttributes() */
43 # include "../extras/dirent.h"
46 #ifdef HAVE_SYS_TYPES_H
47 # include <sys/types.h>
49 #ifdef HAVE_SYS_STAT_H
50 # include <sys/stat.h>
56 #define HAVE_DYNAMIC_PLUGINS
57 #if defined(HAVE_DL_DYLD)
58 # if defined(HAVE_MACH_O_DYLD_H)
59 # include <mach-o/dyld.h>
61 #elif defined(HAVE_DL_BEOS)
62 # if defined(HAVE_IMAGE_H)
65 #elif defined(HAVE_DL_WINDOWS)
67 #elif defined(HAVE_DL_DLOPEN)
68 # if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
71 # if defined(HAVE_SYS_DL_H)
74 #elif defined(HAVE_DL_SHL_LOAD)
75 # if defined(HAVE_DL_H)
79 # undef HAVE_DYNAMIC_PLUGINS
82 #include "vlc_error.h"
84 #include "vlc_interface.h"
85 #include "vlc_playlist.h"
86 #include "intf_eject.h"
88 #include "stream_control.h"
89 #include "input_ext-intf.h"
90 #include "input_ext-dec.h"
91 #include "input_ext-plugins.h"
94 #include "vlc_video.h"
95 #include "video_output.h"
96 #include "vout_synchro.h"
98 #include "audio_output.h"
99 #include "aout_internal.h"
101 #include "stream_output.h"
102 /*#include "announce.h"*/
105 #include "iso_lang.h"
108 #include "vlc_block.h"
110 #if defined( UNDER_CE )
111 # define MYCHAR wchar_t
116 #ifdef HAVE_DYNAMIC_PLUGINS
117 # include "modules_plugin.h"
120 #if defined( UNDER_CE )
121 # include "modules_builtin_evc.h"
122 #elif defined( _MSC_VER )
123 # include "modules_builtin_msvc.h"
125 # include "modules_builtin.h"
128 /*****************************************************************************
130 *****************************************************************************/
131 #ifdef HAVE_DYNAMIC_PLUGINS
132 static void AllocateAllPlugins ( vlc_object_t * );
133 static void AllocatePluginDir ( vlc_object_t *, const MYCHAR *, int );
134 static int AllocatePluginFile ( vlc_object_t *, MYCHAR * );
136 static int AllocateBuiltinModule( vlc_object_t *, int ( * ) ( module_t * ) );
137 static int DeleteModule ( module_t * );
138 #ifdef HAVE_DYNAMIC_PLUGINS
139 static void DupModule ( module_t * );
140 static void UndupModule ( module_t * );
141 static int CallEntry ( module_t * );
142 static void CloseModule ( module_handle_t );
143 static void * GetSymbol ( module_handle_t, const char * );
144 #if defined(HAVE_DL_WINDOWS)
145 static char * GetWindowsError ( void );
149 /*****************************************************************************
150 * module_InitBank: create the module bank.
151 *****************************************************************************
152 * This function creates a module bank structure which will be filled later
153 * on with all the modules found.
154 *****************************************************************************/
155 void __module_InitBank( vlc_object_t *p_this )
157 module_bank_t *p_bank;
159 p_bank = vlc_object_create( p_this, sizeof(module_bank_t) );
160 p_bank->psz_object_name = "module bank";
163 * Store the symbols to be exported
165 #ifdef HAVE_DYNAMIC_PLUGINS
166 STORE_SYMBOLS( &p_bank->symbols );
169 /* Everything worked, attach the object */
170 p_this->p_libvlc->p_module_bank = p_bank;
171 vlc_object_attach( p_bank, p_this->p_libvlc );
176 /*****************************************************************************
177 * module_ResetBank: reset the module bank.
178 *****************************************************************************
179 * This function resets the module bank by unloading all unused plugin
181 *****************************************************************************/
182 void __module_ResetBank( vlc_object_t *p_this )
184 msg_Err( p_this, "FIXME: module_ResetBank unimplemented" );
188 /*****************************************************************************
189 * module_EndBank: empty the module bank.
190 *****************************************************************************
191 * This function unloads all unused plugin modules and empties the module
192 * bank in case of success.
193 *****************************************************************************/
194 void __module_EndBank( vlc_object_t *p_this )
198 vlc_object_detach( p_this->p_libvlc->p_module_bank );
200 while( p_this->p_libvlc->p_module_bank->i_children )
202 p_next = (module_t *)p_this->p_libvlc->p_module_bank->pp_children[0];
204 if( DeleteModule( p_next ) )
206 /* Module deletion failed */
207 msg_Err( p_this, "module \"%s\" can't be removed, trying harder",
208 p_next->psz_object_name );
210 /* We just free the module by hand. Niahahahahaha. */
211 vlc_object_detach( p_next );
212 vlc_object_destroy( p_next );
216 vlc_object_destroy( p_this->p_libvlc->p_module_bank );
221 /*****************************************************************************
222 * module_LoadMain: load the main program info into the module bank.
223 *****************************************************************************
224 * This function fills the module bank structure with the main module infos.
225 * This is very useful as it will allow us to consider the main program just
226 * as another module, and for instance the configuration options of main will
227 * be available in the module bank structure just as for every other module.
228 *****************************************************************************/
229 void __module_LoadMain( vlc_object_t *p_this )
231 AllocateBuiltinModule( p_this, vlc_entry__main );
234 /*****************************************************************************
235 * module_LoadBuiltins: load all modules which we built with.
236 *****************************************************************************
237 * This function fills the module bank structure with the builtin modules.
238 *****************************************************************************/
239 void __module_LoadBuiltins( vlc_object_t * p_this )
241 msg_Dbg( p_this, "checking builtin modules" );
242 ALLOCATE_ALL_BUILTINS();
245 /*****************************************************************************
246 * module_LoadPlugins: load all plugin modules we can find.
247 *****************************************************************************
248 * This function fills the module bank structure with the plugin modules.
249 *****************************************************************************/
250 void __module_LoadPlugins( vlc_object_t * p_this )
252 #ifdef HAVE_DYNAMIC_PLUGINS
253 msg_Dbg( p_this, "checking plugin modules" );
254 AllocateAllPlugins( p_this );
258 /*****************************************************************************
259 * module_Need: return the best module function, given a capability list.
260 *****************************************************************************
261 * This function returns the module that best fits the asked capabilities.
262 *****************************************************************************/
263 module_t * __module_Need( vlc_object_t *p_this, const char *psz_capability,
264 const char *psz_name )
266 typedef struct module_list_t module_list_t;
272 module_list_t *p_next;
275 module_list_t *p_list, *p_first, *p_tmp;
278 int i_which_module, i_index = 0;
279 vlc_bool_t b_intf = VLC_FALSE;
284 char *psz_shortcuts = NULL, *psz_var = NULL;
286 msg_Dbg( p_this, "looking for %s module", psz_capability );
288 /* Deal with variables */
289 if( psz_name && psz_name[0] == '$' )
291 psz_var = config_GetPsz( p_this, psz_name + 1 );
295 /* Count how many different shortcuts were asked for */
296 if( psz_name && *psz_name )
300 /* If the user wants none, give him none. */
301 if( !strcmp( psz_name, "none" ) )
303 if( psz_var ) free( psz_var );
308 psz_shortcuts = strdup( psz_name );
310 for( psz_parser = psz_shortcuts; *psz_parser; psz_parser++ )
312 if( *psz_parser == ',' )
320 /* Sort the modules and test them */
321 p_all = vlc_list_find( p_this, VLC_OBJECT_MODULE, FIND_ANYWHERE );
322 p_list = malloc( p_all->i_count * sizeof( module_list_t ) );
325 /* Parse the module list for capabilities and probe each of them */
326 for( i_which_module = 0; i_which_module < p_all->i_count; i_which_module++ )
328 module_t * p_submodule = NULL;
329 int i_shortcut_bonus = 0, i_submodule;
331 p_module = (module_t *)p_all->p_values[i_which_module].p_object;
333 /* Test that this module can do what we need */
334 if( strcmp( p_module->psz_capability, psz_capability ) )
336 for( i_submodule = 0;
337 i_submodule < p_module->i_children;
340 if( !strcmp( ((module_t*)p_module->pp_children[ i_submodule ])
341 ->psz_capability, psz_capability ) )
344 (module_t*)p_module->pp_children[ i_submodule ];
349 if( p_submodule == NULL )
354 p_module = p_submodule;
357 /* Test if we have the required CPU */
358 if( (p_module->i_cpu & p_this->p_libvlc->i_cpu) != p_module->i_cpu )
363 /* If we required a shortcut, check this plugin provides it. */
367 int i_dummy, i_short = i_shortcuts;
368 char *psz_name = psz_shortcuts;
370 /* Let's drop modules with a 0 score (unless they are
371 * explicitly requested) */
372 b_trash = !p_module->i_score;
376 /* If the last given shortcut is "none" and we couldn't
377 * find the module in the list of provided shortcuts,
378 * then kick the bastard out of here!!! */
379 if( (i_short == 1) && !strcmp(psz_name, "none") )
385 for( i_dummy = 0; p_module->pp_shortcuts[i_dummy]; i_dummy++ )
387 if( !strcasecmp( psz_name,
388 p_module->pp_shortcuts[i_dummy] ) )
392 i_shortcut_bonus = i_short * 10000;
397 if( i_shortcut_bonus )
399 /* We found it... remember ? */
403 /* Go to the next shortcut... This is so lame! */
417 /* If we didn't require a shortcut, trash zero-scored plugins */
418 else if( !p_module->i_score )
423 /* Special case: test if we requested a particular intf plugin */
424 if( !i_shortcuts && p_module->psz_program
425 && !strcmp( p_module->psz_program,
426 p_this->p_vlc->psz_object_name ) )
430 /* Remove previous non-matching plugins */
437 /* This one doesn't match */
441 /* Store this new module */
442 p_list[ i_index ].p_module = p_module;
443 p_list[ i_index ].i_score = p_module->i_score + i_shortcut_bonus;
445 /* Add it to the modules-to-probe list */
448 p_list[ 0 ].p_next = NULL;
453 /* Ok, so at school you learned that quicksort is quick, and
454 * bubble sort sucks raw eggs. But that's when dealing with
455 * thousands of items. Here we have barely 50. */
456 module_list_t *p_newlist = p_first;
458 if( p_first->i_score < p_list[ i_index ].i_score )
460 p_list[ i_index ].p_next = p_first;
461 p_first = &p_list[ i_index ];
465 while( p_newlist->p_next != NULL &&
466 p_newlist->p_next->i_score >= p_list[ i_index ].i_score )
468 p_newlist = p_newlist->p_next;
471 p_list[ i_index ].p_next = p_newlist->p_next;
472 p_newlist->p_next = &p_list[ i_index ];
479 msg_Dbg( p_this, "probing %i candidate%s",
480 i_index, i_index == 1 ? "" : "s" );
482 /* Lock all candidate modules */
484 while( p_tmp != NULL )
486 vlc_object_yield( p_tmp->p_module );
487 p_tmp = p_tmp->p_next;
490 /* We can release the list, interesting modules were yielded */
491 vlc_list_release( p_all );
493 /* Parse the linked list and use the first successful module */
495 while( p_tmp != NULL )
497 if( p_tmp->p_module->pf_activate
498 && p_tmp->p_module->pf_activate( p_this ) == VLC_SUCCESS )
503 vlc_object_release( p_tmp->p_module );
504 p_tmp = p_tmp->p_next;
507 /* Store the locked module value */
510 p_module = p_tmp->p_module;
511 p_tmp = p_tmp->p_next;
518 /* Unlock the remaining modules */
519 while( p_tmp != NULL )
521 vlc_object_release( p_tmp->p_module );
522 p_tmp = p_tmp->p_next;
527 if( p_module != NULL )
529 msg_Dbg( p_module, "using %s module \"%s\"",
530 psz_capability, p_module->psz_object_name );
532 else if( p_first == NULL )
534 msg_Err( p_this, "no %s module matched \"%s\"",
535 psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
537 else if( psz_name != NULL && *psz_name )
539 msg_Warn( p_this, "no %s module matching \"%s\" could be loaded",
540 psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
545 free( psz_shortcuts );
553 /* Don't forget that the module is still locked */
557 /*****************************************************************************
558 * module_Unneed: decrease the usage count of a module.
559 *****************************************************************************
560 * This function must be called by the thread that called module_Need, to
561 * decrease the reference count and allow for hiding of modules.
562 *****************************************************************************/
563 void __module_Unneed( vlc_object_t * p_this, module_t * p_module )
565 /* Use the close method */
566 if( p_module->pf_deactivate )
568 p_module->pf_deactivate( p_this );
571 msg_Dbg( p_module, "unlocking module \"%s\"", p_module->psz_object_name );
573 vlc_object_release( p_module );
578 /*****************************************************************************
579 * Following functions are local.
580 *****************************************************************************/
582 /*****************************************************************************
583 * AllocateAllPlugins: load all plugin modules we can find.
584 *****************************************************************************/
585 #ifdef HAVE_DYNAMIC_PLUGINS
586 static void AllocateAllPlugins( vlc_object_t *p_this )
588 /* Yes, there are two NULLs because we replace one with "plugin-path". */
589 char * path[] = { "modules", PLUGIN_PATH, "plugins", NULL,
592 char ** ppsz_path = path;
595 #if defined( UNDER_CE )
596 wchar_t psz_dir[MAX_PATH];
599 /* If the user provided a plugin path, we add it to the list */
600 path[ sizeof(path)/sizeof(char*) - 2 ] = config_GetPsz( p_this,
603 for( ; *ppsz_path != NULL ; ppsz_path++ )
605 #if defined( SYS_BEOS ) || defined( SYS_DARWIN ) \
606 || ( defined( WIN32 ) && !defined( UNDER_CE ) )
608 /* Handle relative as well as absolute paths */
610 if( !(*ppsz_path)[0] || (*ppsz_path)[1] != ':' )
612 if( (*ppsz_path)[0] != '/' )
615 int i_dirlen = strlen( *ppsz_path );
616 i_dirlen += strlen( p_this->p_libvlc->psz_vlcpath ) + 2;
618 psz_fullpath = malloc( i_dirlen );
619 if( psz_fullpath == NULL )
624 sprintf( psz_fullpath, "%s\\%s",
625 p_this->p_libvlc->psz_vlcpath, *ppsz_path );
627 sprintf( psz_fullpath, "%s/%s",
628 p_this->p_libvlc->psz_vlcpath, *ppsz_path );
634 psz_fullpath = strdup( *ppsz_path );
637 msg_Dbg( p_this, "recursively browsing `%s'", psz_fullpath );
639 /* Don't go deeper than 5 subdirectories */
640 #if defined( UNDER_CE )
641 MultiByteToWideChar( CP_ACP, 0, psz_fullpath, -1, psz_dir, MAX_PATH );
642 AllocatePluginDir( p_this, psz_dir, 5 );
644 AllocatePluginDir( p_this, psz_fullpath, 5 );
647 free( psz_fullpath );
650 /* Free plugin-path */
651 if( path[ sizeof(path)/sizeof(char*) - 2 ] )
652 free( path[ sizeof(path)/sizeof(char*) - 2 ] );
653 path[ sizeof(path)/sizeof(char*) - 2 ] = NULL;
656 /*****************************************************************************
657 * AllocatePluginDir: recursively parse a directory to look for plugins
658 *****************************************************************************/
659 static void AllocatePluginDir( vlc_object_t *p_this, const MYCHAR *psz_dir,
662 #if defined( UNDER_CE ) || defined( _MSC_VER )
664 MYCHAR psz_path[MAX_PATH + 256];
666 char psz_path[MAX_PATH + 256];
668 WIN32_FIND_DATA finddata;
675 struct dirent * file;
683 #if defined( UNDER_CE ) || defined( _MSC_VER )
684 rc = GetFileAttributes( psz_dir );
685 if( !(rc & FILE_ATTRIBUTE_DIRECTORY) )
687 /* Not a directory */
691 /* Parse all files in the directory */
693 swprintf( psz_path, L"%s\\*.*", psz_dir );
695 sprintf( psz_path, "%s\\*.*", psz_dir );
697 handle = FindFirstFile( psz_path, &finddata );
698 if( handle == INVALID_HANDLE_VALUE )
700 /* Empty directory */
704 /* Parse the directory and try to load all files it contains. */
708 unsigned int i_len = wcslen( finddata.cFileName );
709 swprintf( psz_path, L"%s\\%s", psz_dir, finddata.cFileName );
711 unsigned int i_len = strlen( finddata.cFileName );
712 /* Skip ".", ".." and anything starting with "." */
713 if( !*finddata.cFileName || *finddata.cFileName == '.' )
715 if( !FindNextFile( handle, &finddata ) ) break;
718 sprintf( psz_path, "%s\\%s", psz_dir, finddata.cFileName );
721 if( GetFileAttributes( psz_path ) & FILE_ATTRIBUTE_DIRECTORY )
723 AllocatePluginDir( p_this, psz_path, i_maxdepth - 1 );
725 else if( i_len > strlen( LIBEXT )
729 /* We only load files ending with LIBEXT */
730 && !strncasecmp( psz_path + strlen( psz_path)
732 LIBEXT, strlen( LIBEXT ) ) )
735 AllocatePluginFile( p_this, psz_path );
738 while( FindNextFile( handle, &finddata ) );
740 /* Close the directory */
744 dir = opendir( psz_dir );
750 i_dirlen = strlen( psz_dir );
752 /* Parse the directory and try to load all files it contains. */
753 while( (file = readdir( dir )) )
758 /* Skip ".", ".." and anything starting with "." */
759 if( !*file->d_name || *file->d_name == '.' )
764 i_len = strlen( file->d_name );
765 psz_file = malloc( i_dirlen + 1 + i_len + 1 );
767 sprintf( psz_file, "%s\\%s", psz_dir, file->d_name );
769 sprintf( psz_file, "%s/%s", psz_dir, file->d_name );
772 if( !stat( psz_file, &statbuf ) && statbuf.st_mode & S_IFDIR )
774 AllocatePluginDir( p_this, psz_file, i_maxdepth - 1 );
776 else if( i_len > strlen( LIBEXT )
777 /* We only load files ending with LIBEXT */
778 && !strncasecmp( file->d_name + i_len - strlen( LIBEXT ),
779 LIBEXT, strlen( LIBEXT ) ) )
781 AllocatePluginFile( p_this, psz_file );
787 /* Close the directory */
793 /*****************************************************************************
794 * AllocatePluginFile: load a module into memory and initialize it.
795 *****************************************************************************
796 * This function loads a dynamically loadable module and allocates a structure
797 * for its information data. The module can then be handled by module_Need
798 * and module_Unneed. It can be removed by DeleteModule.
799 *****************************************************************************/
800 static int AllocatePluginFile( vlc_object_t * p_this, MYCHAR * psz_file )
803 module_handle_t handle;
806 * Try to dynamically load the module. This part is very platform-
807 * specific, and error messages should be as verbose as possible.
810 #if defined(HAVE_DL_DYLD)
811 NSObjectFileImage image;
812 NSObjectFileImageReturnCode ret;
814 ret = NSCreateObjectFileImageFromFile( psz_file, &image );
816 if( ret != NSObjectFileImageSuccess )
818 msg_Warn( p_this, "cannot create image from `%s'", psz_file );
822 /* Open the dynamic module */
823 handle = NSLinkModule( image, psz_file,
824 NSLINKMODULE_OPTION_RETURN_ON_ERROR );
828 NSLinkEditErrors errors;
829 const char *psz_file, *psz_err;
831 NSLinkEditError( &errors, &i_errnum, &psz_file, &psz_err );
832 msg_Warn( p_this, "cannot link module `%s' (%s)", psz_file, psz_err );
833 NSDestroyObjectFileImage( image );
837 /* Destroy our image, we won't need it */
838 NSDestroyObjectFileImage( image );
840 #elif defined(HAVE_DL_BEOS)
841 handle = load_add_on( psz_file );
844 msg_Warn( p_this, "cannot load module `%s'", psz_file );
848 #elif defined(HAVE_DL_WINDOWS) && defined(UNDER_CE)
849 char psz_filename[MAX_PATH];
850 WideCharToMultiByte( CP_ACP, WC_DEFAULTCHAR, psz_file, -1,
851 psz_filename, MAX_PATH, NULL, NULL );
852 handle = LoadLibrary( psz_filename );
855 char *psz_error = GetWindowsError();
856 msg_Warn( p_this, "cannot load module `%s' (%s)",
857 psz_filename, psz_error );
861 #elif defined(HAVE_DL_WINDOWS) && defined(WIN32)
862 handle = LoadLibrary( psz_file );
865 char *psz_error = GetWindowsError();
866 msg_Warn( p_this, "cannot load module `%s' (%s)",
867 psz_filename, psz_error );
871 #elif defined(HAVE_DL_DLOPEN) && defined(RTLD_NOW)
872 /* static is OK, we are called atomically */
873 static vlc_bool_t b_kde = VLC_FALSE;
875 # if defined(SYS_LINUX)
876 /* XXX HACK #1 - we should NOT open modules with RTLD_GLOBAL, or we
877 * are going to get namespace collisions when two modules have common
878 * public symbols, but ALSA is being a pest here. */
879 if( strstr( psz_file, "alsa_plugin" ) )
881 handle = dlopen( psz_file, RTLD_NOW | RTLD_GLOBAL );
884 msg_Warn( p_this, "cannot load module `%s' (%s)",
885 psz_file, dlerror() );
890 /* XXX HACK #2 - the ugly KDE workaround. It seems that libkdewhatever
891 * causes dlopen() to segfault if libstdc++ is not loaded in the caller,
892 * so we just load libstdc++. Bwahahaha! ph34r! -- Sam. */
893 /* Update: FYI, this is Debian bug #180505, and seems to be fixed. */
894 if( !b_kde && !strstr( psz_file, "kde" ) )
896 dlopen( "libstdc++.so.6", RTLD_NOW )
897 || dlopen( "libstdc++.so.5", RTLD_NOW )
898 || dlopen( "libstdc++.so.4", RTLD_NOW )
899 || dlopen( "libstdc++.so.3", RTLD_NOW );
903 handle = dlopen( psz_file, RTLD_NOW );
906 msg_Warn( p_this, "cannot load module `%s' (%s)",
907 psz_file, dlerror() );
911 #elif defined(HAVE_DL_DLOPEN)
912 # if defined(DL_LAZY)
913 handle = dlopen( psz_file, DL_LAZY );
915 handle = dlopen( psz_file, 0 );
919 msg_Warn( p_this, "cannot load module `%s' (%s)",
920 psz_file, dlerror() );
924 #elif defined(HAVE_DL_SHL_LOAD)
925 handle = shl_load( psz_file, BIND_IMMEDIATE | BIND_NONFATAL, NULL );
928 msg_Warn( p_this, "cannot load module `%s' (%s)",
929 psz_file, strerror(errno) );
934 # error "Something is wrong in modules.c"
938 /* Now that we have successfully loaded the module, we can
939 * allocate a structure for it */
940 p_module = vlc_object_create( p_this, VLC_OBJECT_MODULE );
941 if( p_module == NULL )
943 msg_Err( p_this, "out of memory" );
944 CloseModule( handle );
948 /* We need to fill these since they may be needed by CallEntry() */
950 p_module->psz_filename = psz_filename;
952 p_module->psz_filename = psz_file;
954 p_module->handle = handle;
955 p_module->p_symbols = &p_this->p_libvlc->p_module_bank->symbols;
957 /* Initialize the module: fill p_module->psz_object_name, default config */
958 if( CallEntry( p_module ) != 0 )
960 /* We couldn't call module_init() */
961 vlc_object_destroy( p_module );
962 CloseModule( handle );
966 DupModule( p_module );
967 p_module->psz_filename = strdup( p_module->psz_filename );
968 p_module->psz_longname = strdup( p_module->psz_longname );
970 /* Everything worked fine ! The module is ready to be added to the list. */
971 p_module->b_builtin = VLC_FALSE;
973 /* msg_Dbg( p_this, "plugin \"%s\", %s",
974 p_module->psz_object_name, p_module->psz_longname ); */
976 vlc_object_attach( p_module, p_this->p_libvlc->p_module_bank );
981 /*****************************************************************************
982 * DupModule: make a plugin module standalone.
983 *****************************************************************************
984 * This function duplicates all strings in the module, so that the dynamic
985 * object can be unloaded. It acts recursively on submodules.
986 *****************************************************************************/
987 static void DupModule( module_t *p_module )
992 for( pp_shortcut = p_module->pp_shortcuts ; *pp_shortcut ; pp_shortcut++ )
994 *pp_shortcut = strdup( *pp_shortcut );
997 /* We strdup() these entries so that they are still valid when the
998 * module is unloaded. */
999 p_module->psz_object_name = strdup( p_module->psz_object_name );
1000 p_module->psz_capability = strdup( p_module->psz_capability );
1002 if( p_module->psz_program != NULL )
1004 p_module->psz_program = strdup( p_module->psz_program );
1007 for( i_submodule = 0; i_submodule < p_module->i_children; i_submodule++ )
1009 DupModule( (module_t*)p_module->pp_children[ i_submodule ] );
1013 /*****************************************************************************
1014 * UndupModule: free a duplicated module.
1015 *****************************************************************************
1016 * This function frees the allocations done in DupModule().
1017 *****************************************************************************/
1018 static void UndupModule( module_t *p_module )
1023 for( i_submodule = 0; i_submodule < p_module->i_children; i_submodule++ )
1025 UndupModule( (module_t*)p_module->pp_children[ i_submodule ] );
1028 for( pp_shortcut = p_module->pp_shortcuts ; *pp_shortcut ; pp_shortcut++ )
1030 free( *pp_shortcut );
1033 free( p_module->psz_object_name );
1034 free( p_module->psz_capability );
1036 if( p_module->psz_program != NULL )
1038 free( p_module->psz_program );
1042 #endif /* HAVE_DYNAMIC_PLUGINS */
1044 /*****************************************************************************
1045 * AllocateBuiltinModule: initialize a builtin module.
1046 *****************************************************************************
1047 * This function registers a builtin module and allocates a structure
1048 * for its information data. The module can then be handled by module_Need
1049 * and module_Unneed. It can be removed by DeleteModule.
1050 *****************************************************************************/
1051 static int AllocateBuiltinModule( vlc_object_t * p_this,
1052 int ( *pf_entry ) ( module_t * ) )
1054 module_t * p_module;
1056 /* Now that we have successfully loaded the module, we can
1057 * allocate a structure for it */
1058 p_module = vlc_object_create( p_this, VLC_OBJECT_MODULE );
1059 if( p_module == NULL )
1061 msg_Err( p_this, "out of memory" );
1065 /* Initialize the module : fill p_module->psz_object_name, etc. */
1066 if( pf_entry( p_module ) != 0 )
1068 /* With a well-written module we shouldn't have to print an
1069 * additional error message here, but just make sure. */
1070 msg_Err( p_this, "failed calling entry point in builtin module" );
1071 vlc_object_destroy( p_module );
1075 /* Everything worked fine ! The module is ready to be added to the list. */
1076 p_module->b_builtin = VLC_TRUE;
1078 /* msg_Dbg( p_this, "builtin \"%s\", %s",
1079 p_module->psz_object_name, p_module->psz_longname ); */
1081 vlc_object_attach( p_module, p_this->p_libvlc->p_module_bank );
1086 /*****************************************************************************
1087 * DeleteModule: delete a module and its structure.
1088 *****************************************************************************
1089 * This function can only be called if the module isn't being used.
1090 *****************************************************************************/
1091 static int DeleteModule( module_t * p_module )
1093 vlc_object_detach( p_module );
1095 /* We free the structures that we strdup()ed in Allocate*Module(). */
1096 #ifdef HAVE_DYNAMIC_PLUGINS
1097 if( !p_module->b_builtin )
1099 if( p_module->b_unloadable )
1101 CloseModule( p_module->handle );
1103 UndupModule( p_module );
1104 free( p_module->psz_filename );
1105 free( p_module->psz_longname );
1109 /* Free and detach the object's children */
1110 while( p_module->i_children )
1112 vlc_object_t *p_this = p_module->pp_children[0];
1113 vlc_object_detach( p_this );
1114 vlc_object_destroy( p_this );
1117 config_Free( p_module );
1118 vlc_object_destroy( p_module );
1123 #ifdef HAVE_DYNAMIC_PLUGINS
1124 /*****************************************************************************
1125 * CallEntry: call an entry point.
1126 *****************************************************************************
1127 * This function calls a symbol given its name and a module structure. The
1128 * symbol MUST refer to a function returning int and taking a module_t* as
1130 *****************************************************************************/
1131 static int CallEntry( module_t * p_module )
1133 static char *psz_name = "vlc_entry" MODULE_SUFFIX;
1134 int (* pf_symbol) ( module_t * p_module );
1136 /* Try to resolve the symbol */
1137 pf_symbol = (int (*)(module_t *)) GetSymbol( p_module->handle, psz_name );
1139 if( pf_symbol == NULL )
1141 #if defined(HAVE_DL_DYLD) || defined(HAVE_DL_BEOS)
1142 msg_Warn( p_module, "cannot find symbol \"%s\" in file `%s'",
1143 psz_name, p_module->psz_filename );
1144 #elif defined(HAVE_DL_WINDOWS)
1145 char *psz_error = GetWindowsError();
1146 msg_Warn( p_module, "cannot find symbol \"%s\" in file `%s' (%s)",
1147 psz_name, p_module->psz_filename, psz_error );
1149 #elif defined(HAVE_DL_DLOPEN)
1150 msg_Warn( p_module, "cannot find symbol \"%s\" in file `%s' (%s)",
1151 psz_name, p_module->psz_filename, dlerror() );
1152 #elif defined(HAVE_DL_SHL_LOAD)
1153 msg_Warn( p_module, "cannot find symbol \"%s\" in file `%s' (%s)",
1154 psz_name, p_module->psz_filename, strerror(errno) );
1156 # error "Something is wrong in modules.c"
1160 /* We can now try to call the symbol */
1161 if( pf_symbol( p_module ) != 0 )
1163 /* With a well-written module we shouldn't have to print an
1164 * additional error message here, but just make sure. */
1165 msg_Err( p_module, "failed calling symbol \"%s\" in file `%s'",
1166 psz_name, p_module->psz_filename );
1170 /* Everything worked fine, we can return */
1174 /*****************************************************************************
1175 * CloseModule: unload a dynamic library
1176 *****************************************************************************
1177 * This function unloads a previously opened dynamically linked library
1178 * using a system dependant method. No return value is taken in consideration,
1179 * since some libraries sometimes refuse to close properly.
1180 *****************************************************************************/
1181 static void CloseModule( module_handle_t handle )
1183 #if defined(HAVE_DL_DYLD)
1184 NSUnLinkModule( handle, FALSE );
1186 #elif defined(HAVE_DL_BEOS)
1187 unload_add_on( handle );
1189 #elif defined(HAVE_DL_WINDOWS)
1190 FreeLibrary( handle );
1192 #elif defined(HAVE_DL_DLOPEN)
1195 #elif defined(HAVE_DL_SHL_LOAD)
1196 shl_unload( handle );
1202 /*****************************************************************************
1203 * GetSymbol: get a symbol from a dynamic library
1204 *****************************************************************************
1205 * This function queries a loaded library for a symbol specified in a
1206 * string, and returns a pointer to it. We don't check for dlerror() or
1207 * similar functions, since we want a non-NULL symbol anyway.
1208 *****************************************************************************/
1209 static void * _module_getsymbol( module_handle_t, const char * );
1211 static void * GetSymbol( module_handle_t handle, const char * psz_function )
1213 void * p_symbol = _module_getsymbol( handle, psz_function );
1215 /* MacOS X dl library expects symbols to begin with "_". So do
1216 * some other operating systems. That's really lame, but hey, what
1218 if( p_symbol == NULL )
1220 char *psz_call = malloc( strlen( psz_function ) + 2 );
1222 strcpy( psz_call + 1, psz_function );
1223 psz_call[ 0 ] = '_';
1224 p_symbol = _module_getsymbol( handle, psz_call );
1231 static void * _module_getsymbol( module_handle_t handle,
1232 const char * psz_function )
1234 #if defined(HAVE_DL_DYLD)
1235 NSSymbol sym = NSLookupSymbolInModule( handle, psz_function );
1236 return NSAddressOfSymbol( sym );
1238 #elif defined(HAVE_DL_BEOS)
1240 if( B_OK == get_image_symbol( handle, psz_function,
1241 B_SYMBOL_TYPE_TEXT, &p_symbol ) )
1250 #elif defined(HAVE_DL_WINDOWS) && defined(UNDER_CE)
1251 wchar_t psz_real[256];
1252 MultiByteToWideChar( CP_ACP, 0, psz_function, -1, psz_real, 256 );
1254 return (void *)GetProcAddress( handle, psz_real );
1256 #elif defined(HAVE_DL_WINDOWS) && defined(WIN32)
1257 return (void *)GetProcAddress( handle, (MYCHAR*)psz_function );
1259 #elif defined(HAVE_DL_DLOPEN)
1260 return dlsym( handle, psz_function );
1262 #elif defined(HAVE_DL_SHL_LOAD)
1264 shl_findsym( &handle, psz_function, TYPE_UNDEFINED, &p_sym );
1270 #if defined(HAVE_DL_WINDOWS)
1271 static char * GetWindowsError( void )
1273 #if defined(UNDER_CE)
1274 wchar_t psz_tmp[256];
1275 char * psz_buffer = malloc( 256 );
1277 char * psz_tmp = malloc( 256 );
1279 int i = 0, i_error = GetLastError();
1281 FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
1282 NULL, i_error, MAKELANGID (LANG_NEUTRAL, SUBLANG_DEFAULT),
1283 (LPTSTR) psz_tmp, 256, NULL );
1285 /* Go to the end of the string */
1286 #if defined(UNDER_CE)
1287 while( psz_tmp[i] && psz_tmp[i] != L'\r' && psz_tmp[i] != L'\n' )
1289 while( psz_tmp[i] && psz_tmp[i] != '\r' && psz_tmp[i] != '\n' )
1297 #if defined(UNDER_CE)
1298 swprintf( psz_tmp + i, L" (error %i)", i_error );
1299 psz_tmp[ 255 ] = L'\0';
1301 snprintf( psz_tmp + i, 256 - i, " (error %i)", i_error );
1302 psz_tmp[ 255 ] = '\0';
1306 #if defined(UNDER_CE)
1307 WideCharToMultiByte( CP_ACP, WC_DEFAULTCHAR, psz_tmp, -1,
1308 psz_buffer, 256, NULL, NULL );
1314 #endif /* HAVE_DL_WINDOWS */
1316 #endif /* HAVE_DYNAMIC_PLUGINS */