src/modules/modules.h

   1 /*****************************************************************************
   2  * modules.h : Module management functions.
   3  *****************************************************************************
   4  * Copyright (C) 2001 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef LIBVLC_MODULES_H
  25 # define LIBVLC_MODULES_H 1
  26
  27 typedef struct module_cache_t module_cache_t;
  28
  29 /*****************************************************************************
  30  * Module cache description structure
  31  *****************************************************************************/
  32 struct module_cache_t
  33 {
  34     /* Mandatory cache entry header */
  35     char  *path;
  36     time_t mtime;
  37     off_t  size;
  38
  39     /* Optional extra data */
  40     module_t *p_module;
  41 };
  42
  43
  44 #define MODULE_SHORTCUT_MAX 20
  45
  46 /** The module handle type */
  47 typedef void *module_handle_t;
  48
  49 /** Plugin entry point prototype */
  50 typedef int (*vlc_plugin_cb) (int (*)(void *, void *, int, ...), void *);
  51
  52 /** Core module */
  53 int vlc_entry__core (int (*)(void *, void *, int, ...), void *);
  54
  55 /**
  56  * Internal module descriptor
  57  */
  58 struct module_t
  59 {
  60     module_t   *next;
  61     module_t   *parent;
  62     module_t   *submodule;
  63     unsigned    submodule_count;
  64
  65     /** Shortcuts to the module */
  66     unsigned    i_shortcuts;
  67     char        **pp_shortcuts;
  68
  69     /*
  70      * Variables set by the module to identify itself
  71      */
  72     char *psz_shortname;                              /**< Module name */
  73     char *psz_longname;                   /**< Module descriptive name */
  74     char *psz_help;        /**< Long help string for "special" modules */
  75
  76     char    *psz_capability;                                 /**< Capability */
  77     int      i_score;                          /**< Score for the capability */
  78
  79     bool          b_loaded;        /* Set to true if the dll is loaded */
  80     bool b_unloadable;                        /**< Can we be dlclosed? */
  81
  82     /* Callbacks */
  83     void *pf_activate;
  84     void *pf_deactivate;
  85
  86     /*
  87      * Variables set by the module to store its config options
  88      */
  89     module_config_t *p_config;             /* Module configuration structure */
  90     size_t           confsize;            /* Number of module_config_t items */
  91     unsigned int     i_config_items;        /* number of configuration items */
  92     unsigned int     i_bool_items;            /* number of bool config items */
  93
  94     /*
  95      * Variables used internally by the module manager
  96      */
  97     /* Plugin-specific stuff */
  98     module_handle_t     handle;                             /* Unique handle */
  99     char *              psz_filename;                     /* Module filename */
 100     char *              domain;                            /* gettext domain */
 101 };
 102
 103 module_t *vlc_plugin_describe (vlc_plugin_cb);
 104 module_t *vlc_module_create (module_t *);
 105 void vlc_module_destroy (module_t *);
 106
 107 void module_InitBank (void);
 108 size_t module_LoadPlugins( vlc_object_t * );
 109 #define module_LoadPlugins(a) module_LoadPlugins(VLC_OBJECT(a))
 110 void module_EndBank (bool);
 111 int module_Map (vlc_object_t *, module_t *);
 112
 113 ssize_t module_list_cap (module_t ***, const char *);
 114
 115 int vlc_bindtextdomain (const char *);
 116
 117 /* Low-level OS-dependent handler */
 118 int module_Load (vlc_object_t *, const char *, module_handle_t *, bool);
 119 void *module_Lookup (module_handle_t, const char *);
 120 void module_Unload (module_handle_t);
 121
 122 /* Plugins cache */
 123 void   CacheMerge (vlc_object_t *, module_t *, module_t *);
 124 void   CacheDelete(vlc_object_t *, const char *);
 125 size_t CacheLoad  (vlc_object_t *, const char *, module_cache_t **);
 126
 127 struct stat;
 128
 129 int CacheAdd (module_cache_t **, size_t *,
 130               const char *, const struct stat *, module_t *);
 131 void CacheSave  (vlc_object_t *, const char *, module_cache_t *, size_t);
 132 module_t *CacheFind (module_cache_t *, size_t,
 133                      const char *, const struct stat *);
 134
 135 #endif /* !LIBVLC_MODULES_H */