modules.c
资源名称:vlc-1.0.5.zip [点击查看]
上传用户:kjfoods
上传日期:2020-07-06
资源大小:29949k
文件大小:43k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * modules.c : Builtin and plugin modules management functions
- *****************************************************************************
- * Copyright (C) 2001-2007 the VideoLAN team
- * $Id: 65ba9480b34e0297791582940f5f9b29e78225eb $
- *
- * Authors: Sam Hocevar <sam@zoy.org>
- * Ethan C. Baldridge <BaldridgeE@cadmus.com>
- * Hans-Peter Jansen <hpj@urpla.net>
- * Gildas Bazin <gbazin@videolan.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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
- *****************************************************************************/
- #ifdef HAVE_CONFIG_H
- # include "config.h"
- #endif
- #include <vlc_common.h>
- #include <vlc_plugin.h>
- #include "libvlc.h"
- #include <stdlib.h> /* free(), strtol() */
- #include <stdio.h> /* sprintf() */
- #include <string.h> /* strdup() */
- #include <assert.h>
- #ifdef HAVE_DIRENT_H
- # include <dirent.h>
- #endif
- #ifdef HAVE_SYS_TYPES_H
- # include <sys/types.h>
- #endif
- #ifdef HAVE_SYS_STAT_H
- # include <sys/stat.h>
- #endif
- #ifdef HAVE_UNISTD_H
- # include <unistd.h>
- #endif
- #if !defined(HAVE_DYNAMIC_PLUGINS)
- /* no support for plugins */
- #elif defined(HAVE_DL_DYLD)
- # if defined(HAVE_MACH_O_DYLD_H)
- # include <mach-o/dyld.h>
- # endif
- #elif defined(HAVE_DL_BEOS)
- # if defined(HAVE_IMAGE_H)
- # include <image.h>
- # endif
- #elif defined(HAVE_DL_WINDOWS)
- # include <windows.h>
- #elif defined(HAVE_DL_DLOPEN)
- # if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
- # include <dlfcn.h>
- # endif
- # if defined(HAVE_SYS_DL_H)
- # include <sys/dl.h>
- # endif
- #elif defined(HAVE_DL_SHL_LOAD)
- # if defined(HAVE_DL_H)
- # include <dl.h>
- # endif
- #endif
- #include "config/configuration.h"
- #include "vlc_charset.h"
- #include "vlc_arrays.h"
- #include "modules/modules.h"
- static module_bank_t *p_module_bank = NULL;
- static vlc_mutex_t module_lock = VLC_STATIC_MUTEX;
- int vlc_entry__main( module_t * );
- /*****************************************************************************
- * Local prototypes
- *****************************************************************************/
- #ifdef HAVE_DYNAMIC_PLUGINS
- static void AllocateAllPlugins( vlc_object_t *, module_bank_t * );
- static void AllocatePluginDir( vlc_object_t *, module_bank_t *, const char *,
- unsigned );
- static int AllocatePluginFile( vlc_object_t *, module_bank_t *, const char *,
- int64_t, int64_t );
- static module_t * AllocatePlugin( vlc_object_t *, const char * );
- #endif
- static int AllocateBuiltinModule( vlc_object_t *, int ( * ) ( module_t * ) );
- static void DeleteModule ( module_bank_t *, module_t * );
- #ifdef HAVE_DYNAMIC_PLUGINS
- static void DupModule ( module_t * );
- static void UndupModule ( module_t * );
- #endif
- /**
- * Init bank
- *
- * Creates a module bank structure which will be filled later
- * on with all the modules found.
- * param p_this vlc object structure
- * return nothing
- */
- void __module_InitBank( vlc_object_t *p_this )
- {
- module_bank_t *p_bank = NULL;
- vlc_mutex_lock( &module_lock );
- if( p_module_bank == NULL )
- {
- p_bank = calloc (1, sizeof(*p_bank));
- p_bank->i_usage = 1;
- p_bank->i_cache = p_bank->i_loaded_cache = 0;
- p_bank->pp_cache = p_bank->pp_loaded_cache = NULL;
- p_bank->b_cache = p_bank->b_cache_dirty = false;
- p_bank->head = NULL;
- /* Everything worked, attach the object */
- p_module_bank = p_bank;
- /* Fills the module bank structure with the main module infos.
- * This is very useful as it will allow us to consider the main
- * library just as another module, and for instance the configuration
- * options of main will be available in the module bank structure just
- * as for every other module. */
- AllocateBuiltinModule( p_this, vlc_entry__main );
- }
- else
- p_module_bank->i_usage++;
- /* We do retain the module bank lock until the plugins are loaded as well.
- * This is ugly, this staged loading approach is needed: LibVLC gets
- * some configuration parameters relevant to loading the plugins from
- * the main (builtin) module. The module bank becomes shared read-only data
- * once it is ready, so we need to fully serialize initialization.
- * DO NOT UNCOMMENT the following line unless you managed to squeeze
- * module_LoadPlugins() before you unlock the mutex. */
- /*vlc_mutex_unlock( &module_lock );*/
- }
- #undef module_EndBank
- /**
- * Unloads all unused plugin modules and empties the module
- * bank in case of success.
- * param p_this vlc object structure
- * return nothing
- */
- void module_EndBank( vlc_object_t *p_this, bool b_plugins )
- {
- module_bank_t *p_bank = p_module_bank;
- assert (p_bank != NULL);
- /* Save the configuration */
- if( !config_GetInt( p_this, "ignore-config" ) )
- config_AutoSaveConfigFile( p_this );
- /* If plugins were _not_ loaded, then the caller still has the bank lock
- * from module_InitBank(). */
- if( b_plugins )
- vlc_mutex_lock( &module_lock );
- /*else
- vlc_assert_locked( &module_lock ); not for static mutexes :( */
- if( --p_bank->i_usage > 0 )
- {
- vlc_mutex_unlock( &module_lock );
- return;
- }
- p_module_bank = NULL;
- vlc_mutex_unlock( &module_lock );
- #ifdef HAVE_DYNAMIC_PLUGINS
- if( p_bank->b_cache )
- CacheSave( p_this, p_bank );
- while( p_bank->i_loaded_cache-- )
- {
- if( p_bank->pp_loaded_cache[p_bank->i_loaded_cache] )
- {
- DeleteModule( p_bank,
- p_bank->pp_loaded_cache[p_bank->i_loaded_cache]->p_module );
- free( p_bank->pp_loaded_cache[p_bank->i_loaded_cache]->psz_file );
- free( p_bank->pp_loaded_cache[p_bank->i_loaded_cache] );
- p_bank->pp_loaded_cache[p_bank->i_loaded_cache] = NULL;
- }
- }
- if( p_bank->pp_loaded_cache )
- {
- free( p_bank->pp_loaded_cache );
- p_bank->pp_loaded_cache = NULL;
- }
- while( p_bank->i_cache-- )
- {
- free( p_bank->pp_cache[p_bank->i_cache]->psz_file );
- free( p_bank->pp_cache[p_bank->i_cache] );
- p_bank->pp_cache[p_bank->i_cache] = NULL;
- }
- if( p_bank->pp_cache )
- {
- free( p_bank->pp_cache );
- p_bank->pp_cache = NULL;
- }
- #endif
- while( p_bank->head != NULL )
- DeleteModule( p_bank, p_bank->head );
- free( p_bank );
- }
- #undef module_LoadPlugins
- /**
- * Loads module descriptions for all available plugins.
- * Fills the module bank structure with the plugin modules.
- *
- * param p_this vlc object structure
- * return nothing
- */
- void module_LoadPlugins( vlc_object_t * p_this, bool b_cache_delete )
- {
- module_bank_t *p_bank = p_module_bank;
- assert( p_bank );
- /*vlc_assert_locked( &module_lock ); not for static mutexes :( */
- #ifdef HAVE_DYNAMIC_PLUGINS
- if( p_bank->i_usage == 1 )
- {
- msg_Dbg( p_this, "checking plugin modules" );
- p_module_bank->b_cache = config_GetInt( p_this, "plugins-cache" ) > 0;
- if( p_module_bank->b_cache || b_cache_delete )
- CacheLoad( p_this, p_module_bank, b_cache_delete );
- AllocateAllPlugins( p_this, p_module_bank );
- }
- #endif
- p_module_bank->b_plugins = true;
- vlc_mutex_unlock( &module_lock );
- }
- /**
- * Checks whether a module implements a capability.
- *
- * param m the module
- * param cap the capability to check
- * return TRUE if the module have the capability
- */
- bool module_provides( const module_t *m, const char *cap )
- {
- return !strcmp( m->psz_capability, cap );
- }
- /**
- * Get the internal name of a module
- *
- * param m the module
- * return the module name
- */
- const char *module_get_object( const module_t *m )
- {
- return m->psz_object_name;
- }
- /**
- * Get the human-friendly name of a module.
- *
- * param m the module
- * param long_name TRUE to have the long name of the module
- * return the short or long name of the module
- */
- const char *module_get_name( const module_t *m, bool long_name )
- {
- if( long_name && ( m->psz_longname != NULL) )
- return m->psz_longname;
- return m->psz_shortname ? m->psz_shortname : m->psz_object_name;
- }
- /**
- * Get the help for a module
- *
- * param m the module
- * return the help
- */
- const char *module_get_help( const module_t *m )
- {
- return m->psz_help;
- }
- /**
- * Get the capability for a module
- *
- * param m the module
- * return the capability
- */
- const char *module_get_capability( const module_t *m )
- {
- return m->psz_capability;
- }
- /**
- * Get the score for a module
- *
- * param m the module
- * return the score for the capability
- */
- int module_get_score( const module_t *m )
- {
- return m->i_score;
- }
- module_t *module_hold (module_t *m)
- {
- vlc_hold (&m->vlc_gc_data);
- return m;
- }
- void module_release (module_t *m)
- {
- vlc_release (&m->vlc_gc_data);
- }
- /**
- * Frees the flat list of VLC modules.
- * @param list list obtained by module_list_get()
- * @param length number of items on the list
- * @return nothing.
- */
- void module_list_free (module_t **list)
- {
- if (list == NULL)
- return;
- for (size_t i = 0; list[i] != NULL; i++)
- module_release (list[i]);
- free (list);
- }
- /**
- * Gets the flat list of VLC modules.
- * @param n [OUT] pointer to the number of modules or NULL
- * @return NULL-terminated table of module pointers
- * (release with module_list_free()), or NULL in case of error.
- */
- module_t **module_list_get (size_t *n)
- {
- /* TODO: this whole module lookup is quite inefficient */
- /* Remove this and improve module_need */
- module_t **tab = NULL;
- size_t i = 0;
- assert (p_module_bank);
- for (module_t *mod = p_module_bank->head; mod; mod = mod->next)
- {
- module_t **nt;
- nt = realloc (tab, (i + 2 + mod->submodule_count) * sizeof (*tab));
- if (nt == NULL)
- {
- module_list_free (tab);
- return NULL;
- }
- tab = nt;
- tab[i++] = module_hold (mod);
- for (module_t *subm = mod->submodule; subm; subm = subm->next)
- tab[i++] = module_hold (subm);
- tab[i] = NULL;
- }
- if (n != NULL)
- *n = i;
- return tab;
- }
- typedef struct module_list_t
- {
- module_t *p_module;
- int16_t i_score;
- bool b_force;
- } module_list_t;
- static int modulecmp (const void *a, const void *b)
- {
- const module_list_t *la = a, *lb = b;
- /* Note that qsort() uses _ascending_ order,
- * so the smallest module is the one with the biggest score. */
- return lb->i_score - la->i_score;
- }
- /**
- * module Need
- *
- * Return the best module function, given a capability list.
- *
- * If the p_this object doesn't have it's psz_object_name set, then
- * psz_object_name will be set to the module's name, unless the user
- * provided an alias using the "module name@alias" syntax in which case
- * psz_object_name will be set to the alias.
- *
- * param p_this the vlc object
- * param psz_capability list of capabilities needed
- * param psz_name name of the module asked
- * param b_strict TRUE yto use the strict mode
- * return the module or NULL in case of a failure
- */
- module_t * __module_need( vlc_object_t *p_this, const char *psz_capability,
- const char *psz_name, bool b_strict )
- {
- stats_TimerStart( p_this, "module_need()", STATS_TIMER_MODULE_NEED );
- module_list_t *p_list;
- module_t *p_module;
- int i_shortcuts = 0;
- char *psz_shortcuts = NULL, *psz_var = NULL, *psz_alias = NULL;
- bool b_force_backup = p_this->b_force;
- /* Deal with variables */
- if( psz_name && psz_name[0] == '$' )
- {
- psz_name = psz_var = var_CreateGetString( p_this, psz_name + 1 );
- }
- /* Count how many different shortcuts were asked for */
- if( psz_name && *psz_name )
- {
- char *psz_parser, *psz_last_shortcut;
- /* If the user wants none, give him none. */
- if( !strcmp( psz_name, "none" ) )
- {
- free( psz_var );
- stats_TimerStop( p_this, STATS_TIMER_MODULE_NEED );
- stats_TimerDump( p_this, STATS_TIMER_MODULE_NEED );
- stats_TimerClean( p_this, STATS_TIMER_MODULE_NEED );
- return NULL;
- }
- i_shortcuts++;
- psz_shortcuts = psz_last_shortcut = strdup( psz_name );
- for( psz_parser = psz_shortcuts; *psz_parser; psz_parser++ )
- {
- if( *psz_parser == ',' )
- {
- *psz_parser = ' ';
- i_shortcuts++;
- psz_last_shortcut = psz_parser + 1;
- }
- }
- /* Check if the user wants to override the "strict" mode */
- if( psz_last_shortcut )
- {
- if( !strcmp(psz_last_shortcut, "none") )
- {
- b_strict = true;
- i_shortcuts--;
- }
- else if( !strcmp(psz_last_shortcut, "any") )
- {
- b_strict = false;
- i_shortcuts--;
- }
- }
- }
- /* Sort the modules and test them */
- size_t count;
- module_t **p_all = module_list_get (&count);
- p_list = malloc( count * sizeof( module_list_t ) );
- unsigned i_cpu = vlc_CPU();
- /* Parse the module list for capabilities and probe each of them */
- count = 0;
- for (size_t i = 0; (p_module = p_all[i]) != NULL; i++)
- {
- bool b_shortcut_bonus = false;
- /* Test that this module can do what we need */
- if( !module_provides( p_module, psz_capability ) )
- continue;
- /* Test if we have the required CPU */
- if( (p_module->i_cpu & i_cpu) != p_module->i_cpu )
- continue;
- /* If we required a shortcut, check this plugin provides it. */
- if( i_shortcuts > 0 )
- {
- const char *psz_name = psz_shortcuts;
- for( unsigned i_short = i_shortcuts; i_short > 0; i_short-- )
- {
- for( unsigned i = 0; p_module->pp_shortcuts[i]; i++ )
- {
- char *c;
- if( ( c = strchr( psz_name, '@' ) )
- ? !strncasecmp( psz_name, p_module->pp_shortcuts[i],
- c-psz_name )
- : !strcasecmp( psz_name, p_module->pp_shortcuts[i] ) )
- {
- /* Found it */
- if( c && c[1] )
- psz_alias = c+1;
- b_shortcut_bonus = true;
- goto found_shortcut;
- }
- }
- /* Go to the next shortcut... This is so lame! */
- psz_name += strlen( psz_name ) + 1;
- }
- /* If we are in "strict" mode and we couldn't
- * find the module in the list of provided shortcuts,
- * then kick the bastard out of here!!! */
- if( b_strict )
- continue;
- }
- /* Trash <= 0 scored plugins (they can only be selected by shortcut) */
- if( p_module->i_score <= 0 )
- continue;
- found_shortcut:
- /* Store this new module */
- p_list[count].p_module = module_hold (p_module);
- p_list[count].i_score = p_module->i_score;
- if( b_shortcut_bonus )
- p_list[count].i_score += 10000;
- p_list[count].b_force = b_shortcut_bonus && b_strict;
- count++;
- }
- /* We can release the list, interesting modules are held */
- module_list_free (p_all);
- /* Sort candidates by descending score */
- qsort (p_list, count, sizeof (p_list[0]), modulecmp);
- msg_Dbg( p_this, "looking for %s module: %zu candidate%s", psz_capability,
- count, count == 1 ? "" : "s" );
- /* Parse the linked list and use the first successful module */
- p_module = NULL;
- for (size_t i = 0; (i < count) && (p_module == NULL); i++)
- {
- module_t *p_cand = p_list[i].p_module;
- #ifdef HAVE_DYNAMIC_PLUGINS
- /* Make sure the module is loaded in mem */
- module_t *p_real = p_cand->b_submodule ? p_cand->parent : p_cand;
- if( !p_real->b_builtin && !p_real->b_loaded )
- {
- module_t *p_new_module =
- AllocatePlugin( p_this, p_real->psz_filename );
- if( p_new_module == NULL )
- { /* Corrupted module */
- msg_Err( p_this, "possibly corrupt module cache" );
- module_release( p_cand );
- continue;
- }
- CacheMerge( p_this, p_real, p_new_module );
- DeleteModule( p_module_bank, p_new_module );
- }
- #endif
- p_this->b_force = p_list[i].b_force;
- if( p_cand->pf_activate
- && p_cand->pf_activate( p_this ) == VLC_SUCCESS )
- {
- p_module = p_cand;
- /* Release the remaining modules */
- while (++i < count)
- module_release (p_list[i].p_module);
- }
- else
- module_release( p_cand );
- }
- free( p_list );
- p_this->b_force = b_force_backup;
- if( p_module != NULL )
- {
- msg_Dbg( p_this, "using %s module "%s"",
- psz_capability, p_module->psz_object_name );
- if( !p_this->psz_object_name )
- {
- /* This assumes that p_this is the object which will be using the
- * module. That's not always the case ... but it is in most cases.
- */
- if( psz_alias )
- p_this->psz_object_name = strdup( psz_alias );
- else
- p_this->psz_object_name = strdup( p_module->psz_object_name );
- }
- }
- else if( count == 0 )
- {
- if( !strcmp( psz_capability, "access_demux" )
- || !strcmp( psz_capability, "stream_filter" )
- || !strcmp( psz_capability, "vout_window" ) )
- {
- msg_Dbg( p_this, "no %s module matched "%s"",
- psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
- }
- else
- {
- msg_Err( p_this, "no %s module matched "%s"",
- psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
- msg_StackSet( VLC_EGENERIC, "no %s module matched "%s"",
- psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
- }
- }
- else if( psz_name != NULL && *psz_name )
- {
- msg_Warn( p_this, "no %s module matching "%s" could be loaded",
- psz_capability, (psz_name && *psz_name) ? psz_name : "any" );
- }
- else
- msg_StackSet( VLC_EGENERIC, "no suitable %s module", psz_capability );
- free( psz_shortcuts );
- free( psz_var );
- stats_TimerStop( p_this, STATS_TIMER_MODULE_NEED );
- stats_TimerDump( p_this, STATS_TIMER_MODULE_NEED );
- stats_TimerClean( p_this, STATS_TIMER_MODULE_NEED );
- /* Don't forget that the module is still locked */
- return p_module;
- }
- /**
- * Module unneed
- *
- * This function must be called by the thread that called module_need, to
- * decrease the reference count and allow for hiding of modules.
- * param p_this vlc object structure
- * param p_module the module structure
- * return nothing
- */
- void __module_unneed( vlc_object_t * p_this, module_t * p_module )
- {
- /* Use the close method */
- if( p_module->pf_deactivate )
- {
- p_module->pf_deactivate( p_this );
- }
- msg_Dbg( p_this, "removing module "%s"", p_module->psz_object_name );
- module_release( p_module );
- }
- /**
- * Get a pointer to a module_t given it's name.
- *
- * param psz_name the name of the module
- * return a pointer to the module or NULL in case of a failure
- */
- module_t *module_find( const char * psz_name )
- {
- module_t **list, *module;
- list = module_list_get (NULL);
- if (!list)
- return NULL;
- for (size_t i = 0; (module = list[i]) != NULL; i++)
- {
- const char *psz_module_name = module->psz_object_name;
- if( psz_module_name && !strcmp( psz_module_name, psz_name ) )
- {
- module_hold (module);
- break;
- }
- }
- module_list_free (list);
- return module;
- }
- /**
- * Tell if a module exists and release it in thic case
- *
- * param psz_name th name of the module
- * return TRUE if the module exists
- */
- bool module_exists (const char * psz_name)
- {
- module_t *p_module = module_find (psz_name);
- if( p_module )
- module_release (p_module);
- return p_module != NULL;
- }
- /**
- * Get a pointer to a module_t that matches a shortcut.
- * This is a temporary hack for SD. Do not re-use (generally multiple modules
- * can have the same shortcut, so this is *broken* - use module_need()!).
- *
- * param psz_shortcut shortcut of the module
- * param psz_cap capability of the module
- * return a pointer to the module or NULL in case of a failure
- */
- module_t *module_find_by_shortcut (const char *psz_shortcut)
- {
- module_t **list, *module;
- list = module_list_get (NULL);
- if (!list)
- return NULL;
- for (size_t i = 0; (module = list[i]) != NULL; i++)
- {
- for (size_t j = 0;
- (module->pp_shortcuts[j] != NULL) && (j < MODULE_SHORTCUT_MAX);
- j++)
- {
- if (!strcmp (module->pp_shortcuts[j], psz_shortcut))
- {
- module_hold (module);
- goto out;
- }
- }
- }
- out:
- module_list_free (list);
- return module;
- }
- /**
- * GetModuleNamesForCapability
- *
- * Return a NULL terminated array with the names of the modules
- * that have a certain capability.
- * Free after uses both the string and the table.
- * param psz_capability the capability asked
- * param pppsz_longname an pointer to an array of string to contain
- the long names of the modules. If set to NULL the function don't use it.
- * return the NULL terminated array
- */
- char ** module_GetModulesNamesForCapability( const char *psz_capability,
- char ***pppsz_longname )
- {
- size_t count = 0;
- char **psz_ret;
- module_t **list = module_list_get (NULL);
- /* Proceed in two passes: count the number of modules first */
- for (size_t i = 0; list[i]; i++)
- {
- module_t *p_module = list[i];
- const char *psz_module_capability = p_module->psz_capability;
- if( psz_module_capability
- && !strcmp( psz_module_capability, psz_capability ) )
- count++;
- }
- /* Then get the names */
- psz_ret = malloc( sizeof(char*) * (count+1) );
- if( pppsz_longname )
- *pppsz_longname = malloc( sizeof(char*) * (count+1) );
- if( !psz_ret || ( pppsz_longname && *pppsz_longname == NULL ) )
- {
- free( psz_ret );
- if( pppsz_longname )
- {
- free( *pppsz_longname );
- *pppsz_longname = NULL;
- }
- module_list_free (list);
- return NULL;
- }
- for (size_t i = 0, j = 0; list[i]; i++)
- {
- module_t *p_module = list[i];
- const char *psz_module_capability = p_module->psz_capability;
- if( psz_module_capability
- && !strcmp( psz_module_capability, psz_capability ) )
- {
- /* Explicit hack: Use the last shortcut. It _should_ be
- * different from the object name, at least if the object
- * contains multiple submodules with the same capability. */
- unsigned k = 0;
- while( p_module->pp_shortcuts[k] != NULL )
- k++;
- assert( k > 0); /* pp_shortcuts[0] is always set */
- psz_ret[j] = strdup( p_module->pp_shortcuts[k - 1] );
- if( pppsz_longname )
- (*pppsz_longname)[j] = strdup( module_get_name( p_module, true ) );
- j++;
- }
- }
- psz_ret[count] = NULL;
- module_list_free (list);
- return psz_ret;
- }
- /**
- * Get the configuration of a module
- *
- * param module the module
- * param psize the size of the configuration returned
- * return the configuration as an array
- */
- module_config_t *module_config_get( const module_t *module, unsigned *restrict psize )
- {
- unsigned i,j;
- unsigned size = module->confsize;
- module_config_t *config = malloc( size * sizeof( *config ) );
- assert( psize != NULL );
- *psize = 0;
- if( !config )
- return NULL;
- for( i = 0, j = 0; i < size; i++ )
- {
- const module_config_t *item = module->p_config + i;
- if( item->b_internal /* internal option */
- || item->b_unsaveable /* non-modifiable option */
- || item->b_removed /* removed option */ )
- continue;
- memcpy( config + j, item, sizeof( *config ) );
- j++;
- }
- *psize = j;
- return config;
- }
- /**
- * Release the configuration
- *
- * param the configuration
- * return nothing
- */
- void module_config_free( module_config_t *config )
- {
- free( config );
- }
- /*****************************************************************************
- * Following functions are local.
- *****************************************************************************/
- /*****************************************************************************
- * copy_next_paths_token: from a PATH_SEP_CHAR (a ':' or a ';') separated paths
- * return first path.
- *****************************************************************************/
- static char * copy_next_paths_token( char * paths, char ** remaining_paths )
- {
- char * path;
- int i, done;
- bool escaped = false;
- assert( paths );
- /* Alloc a buffer to store the path */
- path = malloc( strlen( paths ) + 1 );
- if( !path ) return NULL;
- /* Look for PATH_SEP_CHAR (a ':' or a ';') */
- for( i = 0, done = 0 ; paths[i]; i++ )
- {
- /* Take care of \ and : or ; escapement */
- if( escaped )
- {
- escaped = false;
- path[done++] = paths[i];
- }
- #ifdef WIN32
- else if( paths[i] == '/' )
- escaped = true;
- #else
- else if( paths[i] == '\' )
- escaped = true;
- #endif
- else if( paths[i] == PATH_SEP_CHAR )
- break;
- else
- path[done++] = paths[i];
- }
- path[done++] = 0;
- /* Return the remaining paths */
- if( remaining_paths ) {
- *remaining_paths = paths[i] ? &paths[i]+1 : NULL;
- }
- return path;
- }
- char *psz_vlcpath = NULL;
- /*****************************************************************************
- * AllocateAllPlugins: load all plugin modules we can find.
- *****************************************************************************/
- #ifdef HAVE_DYNAMIC_PLUGINS
- static void AllocateAllPlugins( vlc_object_t *p_this, module_bank_t *p_bank )
- {
- const char *vlcpath = psz_vlcpath;
- int count,i;
- char * path;
- vlc_array_t *arraypaths = vlc_array_new();
- /* Contruct the special search path for system that have a relocatable
- * executable. Set it to <vlc path>/modules and <vlc path>/plugins. */
- if( vlcpath && asprintf( &path, "%s" DIR_SEP "modules", vlcpath ) != -1 )
- vlc_array_append( arraypaths, path );
- if( vlcpath && asprintf( &path, "%s" DIR_SEP "plugins", vlcpath ) != -1 )
- vlc_array_append( arraypaths, path );
- #ifndef WIN32
- vlc_array_append( arraypaths, strdup( PLUGIN_PATH ) );
- #endif
- /* If the user provided a plugin path, we add it to the list */
- char *userpaths = config_GetPsz( p_this, "plugin-path" );
- char *paths_iter;
- for( paths_iter = userpaths; paths_iter; )
- {
- path = copy_next_paths_token( paths_iter, &paths_iter );
- if( path )
- vlc_array_append( arraypaths, path );
- }
- count = vlc_array_count( arraypaths );
- for( i = 0 ; i < count ; i++ )
- {
- path = vlc_array_item_at_index( arraypaths, i );
- if( !path )
- continue;
- msg_Dbg( p_this, "recursively browsing `%s'", path );
- /* Don't go deeper than 5 subdirectories */
- AllocatePluginDir( p_this, p_bank, path, 5 );
- free( path );
- }
- vlc_array_destroy( arraypaths );
- free( userpaths );
- }
- /*****************************************************************************
- * AllocatePluginDir: recursively parse a directory to look for plugins
- *****************************************************************************/
- static void AllocatePluginDir( vlc_object_t *p_this, module_bank_t *p_bank,
- const char *psz_dir, unsigned i_maxdepth )
- {
- /* FIXME: Needs to be ported to wide char on ALL Windows builds */
- #ifdef WIN32
- # undef opendir
- # undef closedir
- # undef readdir
- #endif
- #if defined( UNDER_CE ) || defined( _MSC_VER )
- #ifdef UNDER_CE
- wchar_t psz_wpath[MAX_PATH + 256];
- wchar_t psz_wdir[MAX_PATH];
- #endif
- char psz_path[MAX_PATH + 256];
- WIN32_FIND_DATA finddata;
- HANDLE handle;
- int rc;
- #else
- int i_dirlen;
- DIR * dir;
- struct dirent * file;
- #endif
- char * psz_file;
- if( i_maxdepth == 0 )
- return;
- #if defined( UNDER_CE ) || defined( _MSC_VER )
- #ifdef UNDER_CE
- MultiByteToWideChar( CP_ACP, 0, psz_dir, -1, psz_wdir, MAX_PATH );
- rc = GetFileAttributes( psz_wdir );
- if( rc<0 || !(rc&FILE_ATTRIBUTE_DIRECTORY) ) return; /* Not a directory */
- /* Parse all files in the directory */
- swprintf( psz_wpath, L"%ls\*", psz_wdir );
- #else
- rc = GetFileAttributes( psz_dir );
- if( rc<0 || !(rc&FILE_ATTRIBUTE_DIRECTORY) ) return; /* Not a directory */
- #endif
- /* Parse all files in the directory */
- sprintf( psz_path, "%s\*", psz_dir );
- #ifdef UNDER_CE
- handle = FindFirstFile( psz_wpath, &finddata );
- #else
- handle = FindFirstFile( psz_path, &finddata );
- #endif
- if( handle == INVALID_HANDLE_VALUE )
- {
- /* Empty directory */
- return;
- }
- /* Parse the directory and try to load all files it contains. */
- do
- {
- #ifdef UNDER_CE
- unsigned int i_len = wcslen( finddata.cFileName );
- swprintf( psz_wpath, L"%ls\%ls", psz_wdir, finddata.cFileName );
- sprintf( psz_path, "%s\%ls", psz_dir, finddata.cFileName );
- #else
- unsigned int i_len = strlen( finddata.cFileName );
- sprintf( psz_path, "%s\%s", psz_dir, finddata.cFileName );
- #endif
- /* Skip ".", ".." */
- if( !*finddata.cFileName || !strcmp( finddata.cFileName, "." )
- || !strcmp( finddata.cFileName, ".." ) )
- {
- if( !FindNextFile( handle, &finddata ) ) break;
- continue;
- }
- #ifdef UNDER_CE
- if( GetFileAttributes( psz_wpath ) & FILE_ATTRIBUTE_DIRECTORY )
- #else
- if( GetFileAttributes( psz_path ) & FILE_ATTRIBUTE_DIRECTORY )
- #endif
- {
- AllocatePluginDir( p_this, p_bank, psz_path, i_maxdepth - 1 );
- }
- else if( i_len > strlen( LIBEXT )
- /* We only load files ending with LIBEXT */
- && !strncasecmp( psz_path + strlen( psz_path)
- - strlen( LIBEXT ),
- LIBEXT, strlen( LIBEXT ) ) )
- {
- WIN32_FILE_ATTRIBUTE_DATA attrbuf;
- int64_t i_time = 0, i_size = 0;
- #ifdef UNDER_CE
- if( GetFileAttributesEx( psz_wpath, GetFileExInfoStandard,
- &attrbuf ) )
- #else
- if( GetFileAttributesEx( psz_path, GetFileExInfoStandard,
- &attrbuf ) )
- #endif
- {
- i_time = attrbuf.ftLastWriteTime.dwHighDateTime;
- i_time <<= 32;
- i_time |= attrbuf.ftLastWriteTime.dwLowDateTime;
- i_size = attrbuf.nFileSizeHigh;
- i_size <<= 32;
- i_size |= attrbuf.nFileSizeLow;
- }
- psz_file = psz_path;
- AllocatePluginFile( p_this, p_bank, psz_file, i_time, i_size );
- }
- }
- while( !p_this->p_libvlc->b_die && FindNextFile( handle, &finddata ) );
- /* Close the directory */
- FindClose( handle );
- #else
- dir = opendir( psz_dir );
- if( !dir )
- {
- return;
- }
- i_dirlen = strlen( psz_dir );
- /* Parse the directory and try to load all files it contains. */
- while( !p_this->p_libvlc->b_die && ( file = readdir( dir ) ) )
- {
- struct stat statbuf;
- unsigned int i_len;
- int i_stat;
- /* Skip ".", ".." */
- if( !*file->d_name || !strcmp( file->d_name, "." )
- || !strcmp( file->d_name, ".." ) )
- {
- continue;
- }
- i_len = strlen( file->d_name );
- psz_file = malloc( i_dirlen + 1 + i_len + 1 );
- sprintf( psz_file, "%s"DIR_SEP"%s", psz_dir, file->d_name );
- i_stat = stat( psz_file, &statbuf );
- if( !i_stat && statbuf.st_mode & S_IFDIR )
- {
- AllocatePluginDir( p_this, p_bank, psz_file, i_maxdepth - 1 );
- }
- else if( i_len > strlen( LIBEXT )
- /* We only load files ending with LIBEXT */
- && !strncasecmp( file->d_name + i_len - strlen( LIBEXT ),
- LIBEXT, strlen( LIBEXT ) ) )
- {
- int64_t i_time = 0, i_size = 0;
- if( !i_stat )
- {
- i_time = statbuf.st_mtime;
- i_size = statbuf.st_size;
- }
- AllocatePluginFile( p_this, p_bank, psz_file, i_time, i_size );
- }
- free( psz_file );
- }
- /* Close the directory */
- closedir( dir );
- #endif
- }
- /*****************************************************************************
- * AllocatePluginFile: load a module into memory and initialize it.
- *****************************************************************************
- * This function loads a dynamically loadable module and allocates a structure
- * for its information data. The module can then be handled by module_need
- * and module_unneed. It can be removed by DeleteModule.
- *****************************************************************************/
- static int AllocatePluginFile( vlc_object_t * p_this, module_bank_t *p_bank,
- const char *psz_file,
- int64_t i_file_time, int64_t i_file_size )
- {
- module_t * p_module = NULL;
- module_cache_t *p_cache_entry = NULL;
- /*
- * Check our plugins cache first then load plugin if needed
- */
- p_cache_entry = CacheFind( p_bank, psz_file, i_file_time, i_file_size );
- if( !p_cache_entry )
- {
- p_module = AllocatePlugin( p_this, psz_file );
- }
- else
- {
- /* If junk dll, don't try to load it */
- if( p_cache_entry->b_junk )
- {
- p_module = NULL;
- }
- else
- {
- module_config_t *p_item = NULL, *p_end = NULL;
- p_module = p_cache_entry->p_module;
- p_module->b_loaded = false;
- /* For now we force loading if the module's config contains
- * callbacks or actions.
- * Could be optimized by adding an API call.*/
- for( p_item = p_module->p_config, p_end = p_item + p_module->confsize;
- p_item < p_end; p_item++ )
- {
- if( p_item->pf_callback || p_item->i_action )
- {
- p_module = AllocatePlugin( p_this, psz_file );
- break;
- }
- }
- if( p_module == p_cache_entry->p_module )
- p_cache_entry->b_used = true;
- }
- }
- if( p_module )
- {
- /* Everything worked fine !
- * The module is ready to be added to the list. */
- p_module->b_builtin = false;
- /* msg_Dbg( p_this, "plugin "%s", %s",
- p_module->psz_object_name, p_module->psz_longname ); */
- p_module->next = p_bank->head;
- p_bank->head = p_module;
- if( !p_module_bank->b_cache )
- return 0;
- /* Add entry to cache */
- p_bank->pp_cache =
- realloc( p_bank->pp_cache, (p_bank->i_cache + 1) * sizeof(void *) );
- p_bank->pp_cache[p_bank->i_cache] = malloc( sizeof(module_cache_t) );
- if( !p_bank->pp_cache[p_bank->i_cache] )
- return -1;
- p_bank->pp_cache[p_bank->i_cache]->psz_file = strdup( psz_file );
- p_bank->pp_cache[p_bank->i_cache]->i_time = i_file_time;
- p_bank->pp_cache[p_bank->i_cache]->i_size = i_file_size;
- p_bank->pp_cache[p_bank->i_cache]->b_junk = p_module ? 0 : 1;
- p_bank->pp_cache[p_bank->i_cache]->b_used = true;
- p_bank->pp_cache[p_bank->i_cache]->p_module = p_module;
- p_bank->i_cache++;
- }
- return p_module ? 0 : -1;
- }
- /*****************************************************************************
- * AllocatePlugin: load a module into memory and initialize it.
- *****************************************************************************
- * This function loads a dynamically loadable module and allocates a structure
- * for its information data. The module can then be handled by module_need
- * and module_unneed. It can be removed by DeleteModule.
- *****************************************************************************/
- static module_t * AllocatePlugin( vlc_object_t * p_this, const char *psz_file )
- {
- module_t * p_module = NULL;
- module_handle_t handle;
- if( module_Load( p_this, psz_file, &handle ) )
- return NULL;
- /* Now that we have successfully loaded the module, we can
- * allocate a structure for it */
- p_module = vlc_module_create( p_this );
- if( p_module == NULL )
- {
- module_Unload( handle );
- return NULL;
- }
- p_module->psz_filename = strdup( psz_file );
- p_module->handle = handle;
- p_module->b_loaded = true;
- /* Initialize the module: fill p_module, default config */
- if( module_Call( p_this, p_module ) != 0 )
- {
- /* We couldn't call module_init() */
- free( p_module->psz_filename );
- module_release( p_module );
- module_Unload( handle );
- return NULL;
- }
- DupModule( p_module );
- /* Everything worked fine ! The module is ready to be added to the list. */
- p_module->b_builtin = false;
- return p_module;
- }
- /*****************************************************************************
- * DupModule: make a plugin module standalone.
- *****************************************************************************
- * This function duplicates all strings in the module, so that the dynamic
- * object can be unloaded. It acts recursively on submodules.
- *****************************************************************************/
- static void DupModule( module_t *p_module )
- {
- char **pp_shortcut;
- for( pp_shortcut = p_module->pp_shortcuts ; *pp_shortcut ; pp_shortcut++ )
- {
- *pp_shortcut = strdup( *pp_shortcut );
- }
- /* We strdup() these entries so that they are still valid when the
- * module is unloaded. */
- p_module->psz_capability = strdup( p_module->psz_capability );
- p_module->psz_shortname = p_module->psz_shortname ?
- strdup( p_module->psz_shortname ) : NULL;
- p_module->psz_longname = strdup( p_module->psz_longname );
- p_module->psz_help = p_module->psz_help ? strdup( p_module->psz_help )
- : NULL;
- for (module_t *subm = p_module->submodule; subm; subm = subm->next)
- DupModule (subm);
- }
- /*****************************************************************************
- * UndupModule: free a duplicated module.
- *****************************************************************************
- * This function frees the allocations done in DupModule().
- *****************************************************************************/
- static void UndupModule( module_t *p_module )
- {
- char **pp_shortcut;
- for (module_t *subm = p_module->submodule; subm; subm = subm->next)
- UndupModule (subm);
- for( pp_shortcut = p_module->pp_shortcuts ; *pp_shortcut ; pp_shortcut++ )
- {
- free( *pp_shortcut );
- }
- free( p_module->psz_capability );
- FREENULL( p_module->psz_shortname );
- free( p_module->psz_longname );
- FREENULL( p_module->psz_help );
- }
- #endif /* HAVE_DYNAMIC_PLUGINS */
- /*****************************************************************************
- * AllocateBuiltinModule: initialize a builtin module.
- *****************************************************************************
- * This function registers a builtin module and allocates a structure
- * for its information data. The module can then be handled by module_need
- * and module_unneed. It can be removed by DeleteModule.
- *****************************************************************************/
- static int AllocateBuiltinModule( vlc_object_t * p_this,
- int ( *pf_entry ) ( module_t * ) )
- {
- module_t * p_module;
- /* Now that we have successfully loaded the module, we can
- * allocate a structure for it */
- p_module = vlc_module_create( p_this );
- if( p_module == NULL )
- return -1;
- /* Initialize the module : fill p_module->psz_object_name, etc. */
- if( pf_entry( p_module ) != 0 )
- {
- /* With a well-written module we shouldn't have to print an
- * additional error message here, but just make sure. */
- msg_Err( p_this, "failed calling entry point in builtin module" );
- module_release( p_module );
- return -1;
- }
- /* Everything worked fine ! The module is ready to be added to the list. */
- p_module->b_builtin = true;
- /* LOCK */
- p_module->next = p_module_bank->head;
- p_module_bank->head = p_module;
- /* UNLOCK */
- /* msg_Dbg( p_this, "builtin "%s", %s",
- p_module->psz_object_name, p_module->psz_longname ); */
- return 0;
- }
- /*****************************************************************************
- * DeleteModule: delete a module and its structure.
- *****************************************************************************
- * This function can only be called if the module isn't being used.
- *****************************************************************************/
- static void DeleteModule( module_bank_t *p_bank, module_t * p_module )
- {
- assert( p_module );
- /* Unlist the module (if it is in the list) */
- module_t **pp_self = &p_bank->head;
- while (*pp_self != NULL && *pp_self != p_module)
- pp_self = &((*pp_self)->next);
- if (*pp_self)
- *pp_self = p_module->next;
- /* We free the structures that we strdup()ed in Allocate*Module(). */
- #ifdef HAVE_DYNAMIC_PLUGINS
- if( !p_module->b_builtin )
- {
- if( p_module->b_loaded && p_module->b_unloadable )
- {
- module_Unload( p_module->handle );
- }
- UndupModule( p_module );
- free( p_module->psz_filename );
- }
- #endif
- /* Free and detach the object's children */
- while (p_module->submodule)
- {
- module_t *submodule = p_module->submodule;
- p_module->submodule = submodule->next;
- module_release (submodule);
- }
- config_Free( p_module );
- module_release( p_module );
- }