1 /*****************************************************************************
2 * vlc_plugin.h : Macros used from within a module.
3 *****************************************************************************
4 * Copyright (C) 2001-2006 the VideoLAN team
5 * Copyright © 2007-2008 Rémi Denis-Courmont
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., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 #ifndef LIBVLC_MODULES_MACROS_H
25 # define LIBVLC_MODULES_MACROS_H 1
27 /*****************************************************************************
28 * If we are not within a module, assume we're in the vlc core.
29 *****************************************************************************/
30 #if !defined( __PLUGIN__ ) && !defined( __BUILTIN__ )
31 # define MODULE_NAME main
35 * Current plugin ABI version
37 # define MODULE_SYMBOL 0_9_0k
38 # define MODULE_SUFFIX "__0_9_0k"
40 /*****************************************************************************
41 * Add a few defines. You do not want to read this section. Really.
42 *****************************************************************************/
46 * if user has #defined MODULE_NAME foo, then we will need:
47 * #define MODULE_STRING "foo"
49 * and, if HAVE_DYNAMIC_PLUGINS is NOT set, we will also need:
50 * #define MODULE_FUNC( zog ) module_foo_zog
52 * this can't easily be done with the C preprocessor, thus a few ugly hacks.
55 /* I can't believe I need to do this to change « foo » to « "foo" » */
56 #define STRINGIFY( z ) UGLY_KLUDGE( z )
57 #define UGLY_KLUDGE( z ) #z
58 /* And I need to do _this_ to change « foo bar » to « module_foo_bar » ! */
59 #define CONCATENATE( y, z ) CRUDE_HACK( y, z )
60 #define CRUDE_HACK( y, z ) y##__##z
62 /* If the module is built-in, then we need to define foo_InitModule instead
63 * of InitModule. Same for Activate- and DeactivateModule. */
65 # define E_( function ) CONCATENATE( function, MODULE_SYMBOL )
66 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_SYMBOL )
68 # define E_( function ) CONCATENATE( function, MODULE_NAME )
69 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_NAME )
72 #if defined( __PLUGIN__ ) && ( defined( WIN32 ) || defined( UNDER_CE ) )
73 # define DLL_SYMBOL __declspec(dllexport)
74 # define CDECL_SYMBOL __cdecl
75 #elif defined (HAVE_ATTRIBUTE_VISIBILITY)
76 # define DLL_SYMBOL __attribute__((visibility("default")))
83 #if defined( __cplusplus )
84 # define EXTERN_SYMBOL extern "C"
86 # define EXTERN_SYMBOL
89 #define MODULE_STRING STRINGIFY( MODULE_NAME )
92 * InitModule: this function is called once and only once, when the module
93 * is looked at for the first time. We get the useful data from it, for
94 * instance the module name, its shortcuts, its capabilities... we also create
95 * a copy of its config because the module can be unloaded at any time.
97 #if defined (__PLUGIN__) || defined (__BUILTIN__)
98 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL
99 E_(vlc_entry) ( module_t *p_module );
102 #define vlc_module_begin( ) \
103 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
104 __VLC_SYMBOL(vlc_entry) ( module_t *p_module ) \
106 module_config_t *p_config = NULL; \
107 if (vlc_module_set (p_module, VLC_MODULE_NAME, \
108 (const char *)(MODULE_STRING))) \
111 module_t *p_submodule = p_module /* the ; gets added */
113 #define vlc_module_end( ) \
116 return VLC_SUCCESS; \
119 return VLC_EGENERIC; \
121 struct _u_n_u_s_e_d_ /* the ; gets added */
124 #define add_submodule( ) \
125 p_submodule = vlc_submodule_create( p_module )
127 #define add_requirement( cap ) \
128 if (vlc_module_set (p_module, VLC_MODULE_CPU_REQUIREMENT, \
129 (int)(CPU_CAPABILITY_##cap))) \
132 #define add_shortcut( shortcut ) \
133 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTCUT, (int)(shortcut))) \
136 #define set_shortname( shortname ) \
137 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTNAME, \
138 (const char *)(shortname))) \
141 #define set_description( desc ) \
142 if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, \
143 (const char *)(desc))) \
146 #define set_help( help ) \
147 if (vlc_module_set (p_submodule, VLC_MODULE_HELP, (const char *)(help))) \
150 #define set_capability( cap, score ) \
151 if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, (int)(cap)) \
152 || vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
155 #define set_callbacks( activate, deactivate ) \
156 if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
157 || vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
160 #define linked_with_a_crap_library_which_uses_atexit( ) \
161 if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
164 VLC_EXPORT( module_t *, vlc_module_create, ( vlc_object_t * ) );
165 VLC_EXPORT( module_t *, vlc_submodule_create, ( module_t * ) );
166 VLC_EXPORT( int, vlc_module_set, (module_t *module, int propid, ...) );
167 VLC_EXPORT( module_config_t *, vlc_config_create, (module_t *, int type) );
168 VLC_EXPORT( int, vlc_config_set, (module_config_t *, int, ...) );
170 enum vlc_module_properties
172 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
173 * Append new items at the end ONLY. */
174 VLC_MODULE_CPU_REQUIREMENT,
176 VLC_MODULE_SHORTNAME,
177 VLC_MODULE_DESCRIPTION,
179 VLC_MODULE_CAPABILITY,
184 VLC_MODULE_NO_UNLOAD,
188 enum vlc_config_properties
190 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
191 * Append new items at the end ONLY. */
194 /* command line name (args=const char *, vlc_callback_t) */
197 /* description (args=const char *, const char *) */
200 /* actual value (args=int/double/const char *) */
203 /* minimum value (args=int/double/const char * twice) */
206 /* enable advanced flag (args=none) */
209 /* don't write variable to storage (args=none) */
211 VLC_CONFIG_PERSISTENT,
212 /* always write variable to storage (args=none) */
215 /* restart required to apply value change (args=none) */
218 /* hide from user (args=none) */
221 /* tag as no longer supported (args=none) */
223 VLC_CONFIG_CAPABILITY,
224 /* capability for a module or list thereof (args=const char*) */
227 /* one-character (short) command line option name (args=char) */
230 /* possible values list
231 * (args=size_t, const <type> *, const char *const *) */
233 VLC_CONFIG_ADD_ACTION,
234 /* add value change callback (args=vlc_callback_t, const char *) */
237 /* former option name (args=const char *) */
240 /* tag as modifiable by untrusted input item "sources" (args=none) */
243 /*****************************************************************************
244 * Macros used to build the configuration structure.
246 * Note that internally we support only 3 types of config data: int, float
248 * The other types declared here just map to one of these 3 basic types but
249 * have the advantage of also providing very good hints to a configuration
250 * interface so as to make it more user friendly.
251 * The configuration structure also includes category hints. These hints can
252 * provide a configuration interface with some very useful data and again
253 * allow for a more user friendly interface.
254 *****************************************************************************/
256 #define add_type_inner( type ) \
257 p_config = vlc_config_create (p_module, type)
259 #define add_typedesc_inner( type, text, longtext ) \
260 add_type_inner( type ); \
261 vlc_config_set (p_config, VLC_CONFIG_DESC, \
262 (const char *)(text), (const char *)(longtext))
264 #define add_typeadv_inner( type, text, longtext, advc ) \
265 add_typedesc_inner( type, text, longtext ); \
266 if (advc) vlc_config_set (p_config, VLC_CONFIG_ADVANCED)
268 #define add_typename_inner( type, name, text, longtext, advc, cb ) \
269 add_typeadv_inner( type, text, longtext, advc ); \
270 vlc_config_set (p_config, VLC_CONFIG_NAME, \
271 (const char *)(name), (vlc_callback_t)(cb))
273 #define add_string_inner( type, name, text, longtext, advc, cb, v ) \
274 add_typename_inner( type, name, text, longtext, advc, cb ); \
275 vlc_config_set (p_config, VLC_CONFIG_VALUE, (const char *)(v))
277 #define add_int_inner( type, name, text, longtext, advc, cb, v ) \
278 add_typename_inner( type, name, text, longtext, advc, cb ); \
279 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(v))
282 #define set_category( i_id ) \
283 add_type_inner( CONFIG_CATEGORY ); \
284 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
286 #define set_subcategory( i_id ) \
287 add_type_inner( CONFIG_SUBCATEGORY ); \
288 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
290 #define set_section( text, longtext ) \
291 add_typedesc_inner( CONFIG_SECTION, text, longtext )
293 #define add_category_hint( text, longtext, advc ) \
294 add_typeadv_inner( CONFIG_HINT_CATEGORY, text, longtext, advc )
296 #define add_subcategory_hint( text, longtext ) \
297 add_typedesc_inner( CONFIG_HINT_SUBCATEGORY, text, longtext )
299 #define end_subcategory_hint \
300 add_type_inner( CONFIG_HINT_SUBCATEGORY_END )
302 #define add_usage_hint( text ) \
303 add_typedesc_inner( CONFIG_HINT_USAGE, text, NULL )
305 #define add_string( name, value, p_callback, text, longtext, advc ) \
306 add_string_inner( CONFIG_ITEM_STRING, name, text, longtext, advc, p_callback, value )
308 #define add_password( name, value, p_callback, text, longtext, advc ) \
309 add_string_inner( CONFIG_ITEM_PASSWORD, name, text, longtext, advc, p_callback, value )
311 #define add_file( name, value, p_callback, text, longtext, advc ) \
312 add_string_inner( CONFIG_ITEM_FILE, name, text, longtext, advc, p_callback, value )
314 #define add_directory( name, value, p_callback, text, longtext, advc ) \
315 add_string_inner( CONFIG_ITEM_DIRECTORY, name, text, longtext, advc, p_callback, value )
317 #define add_module( name, psz_caps, value, p_callback, text, longtext, advc ) \
318 add_string_inner( CONFIG_ITEM_MODULE, name, text, longtext, advc, p_callback, value ); \
319 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
321 #define add_module_list( name, psz_caps, value, p_callback, text, longtext, advc ) \
322 add_string_inner( CONFIG_ITEM_MODULE_LIST, name, text, longtext, advc, p_callback, value ); \
323 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
326 #define add_module_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
327 add_string_inner( CONFIG_ITEM_MODULE_CAT, name, text, longtext, advc, p_callback, value ); \
328 p_config->min.i = i_subcategory /* gruik */
330 #define add_module_list_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
331 add_string_inner( CONFIG_ITEM_MODULE_LIST_CAT, name, text, longtext, advc, p_callback, value ); \
332 p_config->min.i = i_subcategory /* gruik */
335 #define add_integer( name, value, p_callback, text, longtext, advc ) \
336 add_int_inner( CONFIG_ITEM_INTEGER, name, text, longtext, advc, p_callback, value )
338 #define add_key( name, value, p_callback, text, longtext, advc ) \
339 add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, p_callback, value )
341 #define add_integer_with_range( name, value, i_min, i_max, p_callback, text, longtext, advc ) \
342 add_integer( name, value, p_callback, text, longtext, advc ); \
343 change_integer_range( i_min, i_max )
345 #define add_float( name, v, p_callback, text, longtext, advc ) \
346 add_typename_inner( CONFIG_ITEM_FLOAT, name, text, longtext, advc, p_callback ); \
347 vlc_config_set (p_config, VLC_CONFIG_VALUE, (double)(v))
349 #define add_float_with_range( name, value, f_min, f_max, p_callback, text, longtext, advc ) \
350 add_float( name, value, p_callback, text, longtext, advc ); \
351 change_float_range( f_min, f_max )
353 #define add_bool( name, v, p_callback, text, longtext, advc ) \
354 add_typename_inner( CONFIG_ITEM_BOOL, name, text, longtext, advc, p_callback ); \
355 if (v) vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)true)
357 /* For removed option */
358 #define add_obsolete_inner( name, type ) \
359 add_type_inner( type ); \
360 vlc_config_set (p_config, VLC_CONFIG_NAME, \
361 (const char *)(name), (vlc_callback_t)NULL); \
362 vlc_config_set (p_config, VLC_CONFIG_REMOVED)
364 #define add_obsolete_bool( name ) \
365 add_obsolete_inner( name, CONFIG_ITEM_BOOL )
367 #define add_obsolete_integer( name ) \
368 add_obsolete_inner( name, CONFIG_ITEM_INTEGER )
370 #define add_obsolete_float( name ) \
371 add_obsolete_inner( name, CONFIG_ITEM_FLOAT )
373 #define add_obsolete_string( name ) \
374 add_obsolete_inner( name, CONFIG_ITEM_STRING )
376 /* Modifier macros for the config options (used for fine tuning) */
378 #define add_deprecated_alias( name ) \
379 vlc_config_set (p_config, VLC_CONFIG_OLDNAME, (const char *)(name))
381 #define change_short( ch ) \
382 vlc_config_set (p_config, VLC_CONFIG_SHORTCUT, (int)(ch))
384 #define change_string_list( list, list_text, list_update_func ) \
385 vlc_config_set (p_config, VLC_CONFIG_LIST, \
386 (size_t)(sizeof (list) / sizeof (char *)), \
387 (const char *const *)(list), \
388 (const char *const *)(list_text), \
391 #define change_integer_list( list, list_text, list_update_func ) \
392 vlc_config_set (p_config, VLC_CONFIG_LIST, \
393 (size_t)(sizeof (list) / sizeof (int)), \
394 (const int *)(list), \
395 (const char *const *)(list_text), \
398 #define change_float_list( list, list_text, list_update_func ) \
399 vlc_config_set (p_config, VLC_CONFIG_LIST, \
400 (size_t)(sizeof (list) / sizeof (float)), \
401 (const float *)(list), \
402 (const char *const *)(list_text), \
405 #define change_integer_range( minv, maxv ) \
406 vlc_config_set (p_config, VLC_CONFIG_RANGE, (int)(minv), (int)(maxv))
408 #define change_float_range( minv, maxv ) \
409 vlc_config_set (p_config, VLC_CONFIG_RANGE, \
410 (double)(minv), (double)(maxv))
412 #define change_action_add( pf_action, text ) \
413 vlc_config_set (p_config, VLC_CONFIG_ADD_ACTION, \
414 (vlc_callback_t)(pf_action), (const char *)(text))
416 #define change_internal() \
417 vlc_config_set (p_config, VLC_CONFIG_PRIVATE)
419 #define change_need_restart() \
420 vlc_config_set (p_config, VLC_CONFIG_RESTART)
422 #define change_autosave() \
423 vlc_config_set (p_config, VLC_CONFIG_PERSISTENT)
425 #define change_unsaveable() \
426 vlc_config_set (p_config, VLC_CONFIG_VOLATILE)
428 #define change_unsafe() (void)0 /* no-op */
430 #define change_safe() \
431 vlc_config_set (p_config, VLC_CONFIG_SAFE)