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
29 * This file implements plugin (module) macros used to define a vlc module.
32 /*****************************************************************************
33 * If we are not within a module, assume we're in the vlc core.
34 *****************************************************************************/
35 #if !defined( __PLUGIN__ ) && !defined( __BUILTIN__ )
36 # define MODULE_NAME main
40 * Current plugin ABI version
42 # define MODULE_SYMBOL 1_0_0b
43 # define MODULE_SUFFIX "__1_0_0b"
45 /*****************************************************************************
46 * Add a few defines. You do not want to read this section. Really.
47 *****************************************************************************/
51 * if linking a module statically, we will need:
52 * #define MODULE_FUNC( zog ) module_foo_zog
54 * this can't easily be done with the C preprocessor, thus a few ugly hacks.
57 /* I need to do _this_ to change « foo bar » to « module_foo_bar » ! */
58 #define CONCATENATE( y, z ) CRUDE_HACK( y, z )
59 #define CRUDE_HACK( y, z ) y##__##z
61 /* If the module is built-in, then we need to define foo_InitModule instead
62 * of InitModule. Same for Activate- and DeactivateModule. */
64 # define E_( function ) CONCATENATE( function, MODULE_SYMBOL )
65 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_SYMBOL )
67 # define E_( function ) CONCATENATE( function, MODULE_NAME )
68 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_NAME )
71 #if defined( __PLUGIN__ ) && ( defined( WIN32 ) || defined( UNDER_CE ) )
72 # define DLL_SYMBOL __declspec(dllexport)
73 # define CDECL_SYMBOL __cdecl
79 #if defined( __cplusplus )
80 # define EXTERN_SYMBOL extern "C"
82 # define EXTERN_SYMBOL
86 * InitModule: this function is called once and only once, when the module
87 * is looked at for the first time. We get the useful data from it, for
88 * instance the module name, its shortcuts, its capabilities... we also create
89 * a copy of its config because the module can be unloaded at any time.
91 #define vlc_module_begin( ) \
92 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
93 E_(vlc_entry) ( module_t *p_module ); \
95 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
96 __VLC_SYMBOL(vlc_entry) ( module_t *p_module ) \
98 module_config_t *p_config = NULL; \
99 const char *domain = NULL; \
100 if (vlc_module_set (p_module, VLC_MODULE_NAME, \
101 (const char *)(MODULE_STRING))) \
104 module_t *p_submodule = p_module;
106 #define vlc_module_end( ) \
109 return VLC_SUCCESS; \
112 return VLC_EGENERIC; \
116 #define add_submodule( ) \
117 p_submodule = vlc_submodule_create( p_module );
119 #define add_requirement( cap ) \
120 if (vlc_module_set (p_module, VLC_MODULE_CPU_REQUIREMENT, \
121 (int)(CPU_CAPABILITY_##cap))) \
124 #define add_shortcut( shortcut ) \
125 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTCUT, \
126 (const char *)(shortcut))) \
129 #define set_shortname( shortname ) \
130 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTNAME, domain, \
131 (const char *)(shortname))) \
134 #define set_description( desc ) \
135 if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, domain, \
136 (const char *)(desc))) \
139 #define set_help( help ) \
140 if (vlc_module_set (p_submodule, VLC_MODULE_HELP, domain, \
141 (const char *)(help))) \
144 #define set_capability( cap, score ) \
145 if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, \
146 (const char *)(cap)) \
147 || vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
150 #define set_callbacks( activate, deactivate ) \
151 if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
152 || vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
155 #define linked_with_a_crap_library_which_uses_atexit( ) \
156 if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
159 #define set_text_domain( dom ) domain = (dom);
161 VLC_EXPORT( module_t *, vlc_module_create, ( vlc_object_t * ) );
162 VLC_EXPORT( module_t *, vlc_submodule_create, ( module_t * ) );
163 VLC_EXPORT( int, vlc_module_set, (module_t *module, int propid, ...) );
164 VLC_EXPORT( module_config_t *, vlc_config_create, (module_t *, int type) );
165 VLC_EXPORT( int, vlc_config_set, (module_config_t *, int, ...) );
167 enum vlc_module_properties
169 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
170 * Append new items at the end ONLY. */
171 VLC_MODULE_CPU_REQUIREMENT,
173 VLC_MODULE_SHORTNAME_NODOMAIN,
174 VLC_MODULE_DESCRIPTION_NODOMAIN,
175 VLC_MODULE_HELP_NODOMAIN,
176 VLC_MODULE_CAPABILITY,
178 VLC_MODULE_PROGRAM, /* obsoleted */
181 VLC_MODULE_NO_UNLOAD,
183 VLC_MODULE_SHORTNAME,
184 VLC_MODULE_DESCRIPTION,
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) */
196 VLC_CONFIG_DESC_NODOMAIN,
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) */
229 VLC_CONFIG_LIST_NODOMAIN,
230 /* possible values list
231 * (args=size_t, const <type> *, const char *const *) */
233 VLC_CONFIG_ADD_ACTION_NODOMAIN,
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 /* description (args=const char *, const char *, const char *) */
246 /* possible values list
247 * (args=const char *, size_t, const <type> *, const char *const *) */
249 VLC_CONFIG_ADD_ACTION,
250 /* add value change callback
251 * (args=const char *, vlc_callback_t, const char *) */
254 /*****************************************************************************
255 * Macros used to build the configuration structure.
257 * Note that internally we support only 3 types of config data: int, float
259 * The other types declared here just map to one of these 3 basic types but
260 * have the advantage of also providing very good hints to a configuration
261 * interface so as to make it more user friendly.
262 * The configuration structure also includes category hints. These hints can
263 * provide a configuration interface with some very useful data and again
264 * allow for a more user friendly interface.
265 *****************************************************************************/
267 #define add_type_inner( type ) \
268 p_config = vlc_config_create (p_module, type);
270 #define add_typedesc_inner( type, text, longtext ) \
271 add_type_inner( type ) \
272 vlc_config_set (p_config, VLC_CONFIG_DESC, domain, \
273 (const char *)(text), (const char *)(longtext));
275 #define add_typeadv_inner( type, text, longtext, advc ) \
276 add_typedesc_inner( type, text, longtext ) \
277 if (advc) vlc_config_set (p_config, VLC_CONFIG_ADVANCED);
279 #define add_typename_inner( type, name, text, longtext, advc, cb ) \
280 add_typeadv_inner( type, text, longtext, advc ) \
281 vlc_config_set (p_config, VLC_CONFIG_NAME, \
282 (const char *)(name), (vlc_callback_t)(cb));
284 #define add_string_inner( type, name, text, longtext, advc, cb, v ) \
285 add_typename_inner( type, name, text, longtext, advc, cb ) \
286 vlc_config_set (p_config, VLC_CONFIG_VALUE, (const char *)(v));
288 #define add_int_inner( type, name, text, longtext, advc, cb, v ) \
289 add_typename_inner( type, name, text, longtext, advc, cb ) \
290 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(v));
293 #define set_category( i_id ) \
294 add_type_inner( CONFIG_CATEGORY ) \
295 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id));
297 #define set_subcategory( i_id ) \
298 add_type_inner( CONFIG_SUBCATEGORY ) \
299 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id));
301 #define set_section( text, longtext ) \
302 add_typedesc_inner( CONFIG_SECTION, text, longtext )
304 #define add_category_hint( text, longtext, advc ) \
305 add_typeadv_inner( CONFIG_HINT_CATEGORY, text, longtext, advc )
307 #define add_subcategory_hint( text, longtext ) \
308 add_typedesc_inner( CONFIG_HINT_SUBCATEGORY, text, longtext )
310 #define end_subcategory_hint \
311 add_type_inner( CONFIG_HINT_SUBCATEGORY_END )
313 #define add_usage_hint( text ) \
314 add_typedesc_inner( CONFIG_HINT_USAGE, text, NULL )
316 #define add_string( name, value, p_callback, text, longtext, advc ) \
317 add_string_inner( CONFIG_ITEM_STRING, name, text, longtext, advc, \
320 #define add_password( name, value, p_callback, text, longtext, advc ) \
321 add_string_inner( CONFIG_ITEM_PASSWORD, name, text, longtext, advc, \
324 #define add_file( name, value, p_callback, text, longtext, advc ) \
325 add_string_inner( CONFIG_ITEM_FILE, name, text, longtext, advc, \
328 #define add_directory( name, value, p_callback, text, longtext, advc ) \
329 add_string_inner( CONFIG_ITEM_DIRECTORY, name, text, longtext, advc, \
332 #define add_module( name, psz_caps, value, p_callback, text, longtext, advc ) \
333 add_string_inner( CONFIG_ITEM_MODULE, name, text, longtext, advc, \
334 p_callback, value ) \
335 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps));
337 #define add_module_list( name, psz_caps, value, p_callback, text, longtext, advc ) \
338 add_string_inner( CONFIG_ITEM_MODULE_LIST, name, text, longtext, advc, \
339 p_callback, value ) \
340 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps));
343 #define add_module_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
344 add_string_inner( CONFIG_ITEM_MODULE_CAT, name, text, longtext, advc, \
345 p_callback, value ) \
346 p_config->min.i = i_subcategory /* gruik */;
348 #define add_module_list_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
349 add_string_inner( CONFIG_ITEM_MODULE_LIST_CAT, name, text, longtext, \
350 advc, p_callback, value ) \
351 p_config->min.i = i_subcategory /* gruik */;
354 #define add_integer( name, value, p_callback, text, longtext, advc ) \
355 add_int_inner( CONFIG_ITEM_INTEGER, name, text, longtext, advc, \
358 #define add_key( name, value, p_callback, text, longtext, advc ) \
359 add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, p_callback, \
362 #define add_integer_with_range( name, value, i_min, i_max, p_callback, text, longtext, advc ) \
363 add_integer( name, value, p_callback, text, longtext, advc ) \
364 change_integer_range( i_min, i_max )
366 #define add_float( name, v, p_callback, text, longtext, advc ) \
367 add_typename_inner( CONFIG_ITEM_FLOAT, name, text, longtext, advc, p_callback ) \
368 vlc_config_set (p_config, VLC_CONFIG_VALUE, (double)(v));
370 #define add_float_with_range( name, value, f_min, f_max, p_callback, text, longtext, advc ) \
371 add_float( name, value, p_callback, text, longtext, advc ) \
372 change_float_range( f_min, f_max )
374 #define add_bool( name, v, p_callback, text, longtext, advc ) \
375 add_typename_inner( CONFIG_ITEM_BOOL, name, text, longtext, advc, \
377 if (v) vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)true);
379 /* For removed option */
380 #define add_obsolete_inner( name, type ) \
381 add_type_inner( type ) \
382 vlc_config_set (p_config, VLC_CONFIG_NAME, \
383 (const char *)(name), (vlc_callback_t)NULL); \
384 vlc_config_set (p_config, VLC_CONFIG_REMOVED);
386 #define add_obsolete_bool( name ) \
387 add_obsolete_inner( name, CONFIG_ITEM_BOOL )
389 #define add_obsolete_integer( name ) \
390 add_obsolete_inner( name, CONFIG_ITEM_INTEGER )
392 #define add_obsolete_float( name ) \
393 add_obsolete_inner( name, CONFIG_ITEM_FLOAT )
395 #define add_obsolete_string( name ) \
396 add_obsolete_inner( name, CONFIG_ITEM_STRING )
398 /* Modifier macros for the config options (used for fine tuning) */
400 #define add_deprecated_alias( name ) \
401 vlc_config_set (p_config, VLC_CONFIG_OLDNAME, (const char *)(name))
403 #define change_short( ch ) \
404 vlc_config_set (p_config, VLC_CONFIG_SHORTCUT, (int)(ch));
406 #define change_string_list( list, list_text, list_update_func ) \
407 vlc_config_set (p_config, VLC_CONFIG_LIST, domain, \
408 (size_t)(sizeof (list) / sizeof (char *)), \
409 (const char *const *)(list), \
410 (const char *const *)(list_text), \
411 (vlc_callback_t)(list_update_func));
413 #define change_integer_list( list, list_text, list_update_func ) \
414 vlc_config_set (p_config, VLC_CONFIG_LIST, domain, \
415 (size_t)(sizeof (list) / sizeof (int)), \
416 (const int *)(list), \
417 (const char *const *)(list_text), \
418 (vlc_callback_t)(list_update_func));
420 #define change_float_list( list, list_text, list_update_func ) \
421 vlc_config_set (p_config, VLC_CONFIG_LIST, domain, \
422 (size_t)(sizeof (list) / sizeof (float)), \
423 (const float *)(list), \
424 (const char *const *)(list_text), \
425 (vlc_callback_t)(list_update_func));
427 #define change_integer_range( minv, maxv ) \
428 vlc_config_set (p_config, VLC_CONFIG_RANGE, (int)(minv), (int)(maxv));
430 #define change_float_range( minv, maxv ) \
431 vlc_config_set (p_config, VLC_CONFIG_RANGE, \
432 (double)(minv), (double)(maxv));
434 #define change_action_add( pf_action, text ) \
435 vlc_config_set (p_config, VLC_CONFIG_ADD_ACTION, domain, \
436 (vlc_callback_t)(pf_action), (const char *)(text));
438 #define change_internal() \
439 vlc_config_set (p_config, VLC_CONFIG_PRIVATE);
441 #define change_need_restart() \
442 vlc_config_set (p_config, VLC_CONFIG_RESTART);
444 #define change_autosave() \
445 vlc_config_set (p_config, VLC_CONFIG_PERSISTENT);
447 #define change_unsaveable() \
448 vlc_config_set (p_config, VLC_CONFIG_VOLATILE);
450 #define change_unsafe() (void)0; /* no-op */
452 #define change_safe() \
453 vlc_config_set (p_config, VLC_CONFIG_SAFE);
455 /* Meta data plugin exports */
456 #define VLC_META_EXPORT( name, value ) \
457 EXTERN_SYMBOL DLL_SYMBOL const char * CDECL_SYMBOL \
458 E_(vlc_entry_ ## name) (void); \
459 EXTERN_SYMBOL DLL_SYMBOL const char * CDECL_SYMBOL \
460 __VLC_SYMBOL(vlc_entry_ ## name) (void) \
465 #if defined (__LIBVLC__)
466 # define VLC_COPYRIGHT_EXPORT VLC_META_EXPORT (copyright, \
467 "\x43\x6f\x70\x79\x72\x69\x67\x68\x74\x20\x28\x43\x29\x20\x74\x68" \
468 "\x65\x20\x56\x69\x64\x65\x6f\x4c\x41\x4e\x20\x56\x4c\x43\x20\x6d" \
469 "\x65\x64\x69\x61\x20\x70\x6c\x61\x79\x65\x72\x20\x64\x65\x76\x65" \
470 "\x6c\x6f\x70\x70\x65\x72\x73" )
471 #elif !defined (VLC_COPYRIGHT_EXPORT)
472 # define VLC_COPYRIGHT_EXPORT
474 #define VLC_LICENSE_EXPORT VLC_META_EXPORT (license, \
475 "\x4c\x69\x63\x65\x6e\x73\x65\x64\x20\x75\x6e\x64\x65\x72\x20\x74" \
476 "\x68\x65\x20\x74\x65\x72\x6d\x73\x20\x6f\x66\x20\x74\x68\x65\x20" \
477 "\x47\x4e\x55\x20\x47\x65\x6e\x65\x72\x61\x6c\x20\x50\x75\x62\x6c" \
478 "\x69\x63\x20\x4c\x69\x63\x65\x6e\x73\x65\x2c\x20\x76\x65\x72\x73" \
479 "\x69\x6f\x6e\x20\x32\x20\x6f\x72\x20\x6c\x61\x74\x65\x72\x2e" )
481 #define VLC_METADATA_EXPORTS \
482 VLC_COPYRIGHT_EXPORT \