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 HAVE_DYNAMIC_PLUGINS is NOT set, we will need:
47 * #define MODULE_FUNC( zog ) module_foo_zog
49 * this can't easily be done with the C preprocessor, thus a few ugly hacks.
52 /* I need to do _this_ to change « foo bar » to « module_foo_bar » ! */
53 #define CONCATENATE( y, z ) CRUDE_HACK( y, z )
54 #define CRUDE_HACK( y, z ) y##__##z
56 /* If the module is built-in, then we need to define foo_InitModule instead
57 * of InitModule. Same for Activate- and DeactivateModule. */
59 # define E_( function ) CONCATENATE( function, MODULE_SYMBOL )
60 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_SYMBOL )
62 # define E_( function ) CONCATENATE( function, MODULE_NAME )
63 # define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_NAME )
66 #if defined( __PLUGIN__ ) && ( defined( WIN32 ) || defined( UNDER_CE ) )
67 # define DLL_SYMBOL __declspec(dllexport)
68 # define CDECL_SYMBOL __cdecl
69 #elif defined (HAVE_ATTRIBUTE_VISIBILITY)
70 # define DLL_SYMBOL __attribute__((visibility("default")))
77 #if defined( __cplusplus )
78 # define EXTERN_SYMBOL extern "C"
80 # define EXTERN_SYMBOL
84 * InitModule: this function is called once and only once, when the module
85 * is looked at for the first time. We get the useful data from it, for
86 * instance the module name, its shortcuts, its capabilities... we also create
87 * a copy of its config because the module can be unloaded at any time.
89 #if defined (__PLUGIN__) || defined (__BUILTIN__)
90 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL
91 E_(vlc_entry) ( module_t *p_module );
94 #define vlc_module_begin( ) \
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 if (vlc_module_set (p_module, VLC_MODULE_NAME, \
100 (const char *)(MODULE_STRING))) \
103 module_t *p_submodule = p_module /* the ; gets added */
105 #define vlc_module_end( ) \
108 return VLC_SUCCESS; \
111 return VLC_EGENERIC; \
113 struct _u_n_u_s_e_d_ /* the ; gets added */
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, \
131 (const char *)(shortname))) \
134 #define set_description( desc ) \
135 if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, \
136 (const char *)(desc))) \
139 #define set_help( help ) \
140 if (vlc_module_set (p_submodule, VLC_MODULE_HELP, (const char *)(help))) \
143 #define set_capability( cap, score ) \
144 if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, \
145 (const char *)(cap)) \
146 || vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
149 #define set_callbacks( activate, deactivate ) \
150 if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
151 || vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
154 #define linked_with_a_crap_library_which_uses_atexit( ) \
155 if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
158 VLC_EXPORT( module_t *, vlc_module_create, ( vlc_object_t * ) );
159 VLC_EXPORT( module_t *, vlc_submodule_create, ( module_t * ) );
160 VLC_EXPORT( int, vlc_module_set, (module_t *module, int propid, ...) );
161 VLC_EXPORT( module_config_t *, vlc_config_create, (module_t *, int type) );
162 VLC_EXPORT( int, vlc_config_set, (module_config_t *, int, ...) );
164 enum vlc_module_properties
166 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
167 * Append new items at the end ONLY. */
168 VLC_MODULE_CPU_REQUIREMENT,
170 VLC_MODULE_SHORTNAME,
171 VLC_MODULE_DESCRIPTION,
173 VLC_MODULE_CAPABILITY,
178 VLC_MODULE_NO_UNLOAD,
182 enum vlc_config_properties
184 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
185 * Append new items at the end ONLY. */
188 /* command line name (args=const char *, vlc_callback_t) */
191 /* description (args=const char *, const char *) */
194 /* actual value (args=int/double/const char *) */
197 /* minimum value (args=int/double/const char * twice) */
200 /* enable advanced flag (args=none) */
203 /* don't write variable to storage (args=none) */
205 VLC_CONFIG_PERSISTENT,
206 /* always write variable to storage (args=none) */
209 /* restart required to apply value change (args=none) */
212 /* hide from user (args=none) */
215 /* tag as no longer supported (args=none) */
217 VLC_CONFIG_CAPABILITY,
218 /* capability for a module or list thereof (args=const char*) */
221 /* one-character (short) command line option name (args=char) */
224 /* possible values list
225 * (args=size_t, const <type> *, const char *const *) */
227 VLC_CONFIG_ADD_ACTION,
228 /* add value change callback (args=vlc_callback_t, const char *) */
231 /* former option name (args=const char *) */
234 /* tag as modifiable by untrusted input item "sources" (args=none) */
237 /*****************************************************************************
238 * Macros used to build the configuration structure.
240 * Note that internally we support only 3 types of config data: int, float
242 * The other types declared here just map to one of these 3 basic types but
243 * have the advantage of also providing very good hints to a configuration
244 * interface so as to make it more user friendly.
245 * The configuration structure also includes category hints. These hints can
246 * provide a configuration interface with some very useful data and again
247 * allow for a more user friendly interface.
248 *****************************************************************************/
250 #define add_type_inner( type ) \
251 p_config = vlc_config_create (p_module, type)
253 #define add_typedesc_inner( type, text, longtext ) \
254 add_type_inner( type ); \
255 vlc_config_set (p_config, VLC_CONFIG_DESC, \
256 (const char *)(text), (const char *)(longtext))
258 #define add_typeadv_inner( type, text, longtext, advc ) \
259 add_typedesc_inner( type, text, longtext ); \
260 if (advc) vlc_config_set (p_config, VLC_CONFIG_ADVANCED)
262 #define add_typename_inner( type, name, text, longtext, advc, cb ) \
263 add_typeadv_inner( type, text, longtext, advc ); \
264 vlc_config_set (p_config, VLC_CONFIG_NAME, \
265 (const char *)(name), (vlc_callback_t)(cb))
267 #define add_string_inner( type, name, text, longtext, advc, cb, v ) \
268 add_typename_inner( type, name, text, longtext, advc, cb ); \
269 vlc_config_set (p_config, VLC_CONFIG_VALUE, (const char *)(v))
271 #define add_int_inner( type, name, text, longtext, advc, cb, v ) \
272 add_typename_inner( type, name, text, longtext, advc, cb ); \
273 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(v))
276 #define set_category( i_id ) \
277 add_type_inner( CONFIG_CATEGORY ); \
278 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
280 #define set_subcategory( i_id ) \
281 add_type_inner( CONFIG_SUBCATEGORY ); \
282 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
284 #define set_section( text, longtext ) \
285 add_typedesc_inner( CONFIG_SECTION, text, longtext )
287 #define add_category_hint( text, longtext, advc ) \
288 add_typeadv_inner( CONFIG_HINT_CATEGORY, text, longtext, advc )
290 #define add_subcategory_hint( text, longtext ) \
291 add_typedesc_inner( CONFIG_HINT_SUBCATEGORY, text, longtext )
293 #define end_subcategory_hint \
294 add_type_inner( CONFIG_HINT_SUBCATEGORY_END )
296 #define add_usage_hint( text ) \
297 add_typedesc_inner( CONFIG_HINT_USAGE, text, NULL )
299 #define add_string( name, value, p_callback, text, longtext, advc ) \
300 add_string_inner( CONFIG_ITEM_STRING, name, text, longtext, advc, p_callback, value )
302 #define add_password( name, value, p_callback, text, longtext, advc ) \
303 add_string_inner( CONFIG_ITEM_PASSWORD, name, text, longtext, advc, p_callback, value )
305 #define add_file( name, value, p_callback, text, longtext, advc ) \
306 add_string_inner( CONFIG_ITEM_FILE, name, text, longtext, advc, p_callback, value )
308 #define add_directory( name, value, p_callback, text, longtext, advc ) \
309 add_string_inner( CONFIG_ITEM_DIRECTORY, name, text, longtext, advc, p_callback, value )
311 #define add_module( name, psz_caps, value, p_callback, text, longtext, advc ) \
312 add_string_inner( CONFIG_ITEM_MODULE, name, text, longtext, advc, p_callback, value ); \
313 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
315 #define add_module_list( name, psz_caps, value, p_callback, text, longtext, advc ) \
316 add_string_inner( CONFIG_ITEM_MODULE_LIST, name, text, longtext, advc, p_callback, value ); \
317 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
320 #define add_module_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
321 add_string_inner( CONFIG_ITEM_MODULE_CAT, name, text, longtext, advc, p_callback, value ); \
322 p_config->min.i = i_subcategory /* gruik */
324 #define add_module_list_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
325 add_string_inner( CONFIG_ITEM_MODULE_LIST_CAT, name, text, longtext, advc, p_callback, value ); \
326 p_config->min.i = i_subcategory /* gruik */
329 #define add_integer( name, value, p_callback, text, longtext, advc ) \
330 add_int_inner( CONFIG_ITEM_INTEGER, name, text, longtext, advc, p_callback, value )
332 #define add_key( name, value, p_callback, text, longtext, advc ) \
333 add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, p_callback, value )
335 #define add_integer_with_range( name, value, i_min, i_max, p_callback, text, longtext, advc ) \
336 add_integer( name, value, p_callback, text, longtext, advc ); \
337 change_integer_range( i_min, i_max )
339 #define add_float( name, v, p_callback, text, longtext, advc ) \
340 add_typename_inner( CONFIG_ITEM_FLOAT, name, text, longtext, advc, p_callback ); \
341 vlc_config_set (p_config, VLC_CONFIG_VALUE, (double)(v))
343 #define add_float_with_range( name, value, f_min, f_max, p_callback, text, longtext, advc ) \
344 add_float( name, value, p_callback, text, longtext, advc ); \
345 change_float_range( f_min, f_max )
347 #define add_bool( name, v, p_callback, text, longtext, advc ) \
348 add_typename_inner( CONFIG_ITEM_BOOL, name, text, longtext, advc, p_callback ); \
349 if (v) vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)true)
351 /* For removed option */
352 #define add_obsolete_inner( name, type ) \
353 add_type_inner( type ); \
354 vlc_config_set (p_config, VLC_CONFIG_NAME, \
355 (const char *)(name), (vlc_callback_t)NULL); \
356 vlc_config_set (p_config, VLC_CONFIG_REMOVED)
358 #define add_obsolete_bool( name ) \
359 add_obsolete_inner( name, CONFIG_ITEM_BOOL )
361 #define add_obsolete_integer( name ) \
362 add_obsolete_inner( name, CONFIG_ITEM_INTEGER )
364 #define add_obsolete_float( name ) \
365 add_obsolete_inner( name, CONFIG_ITEM_FLOAT )
367 #define add_obsolete_string( name ) \
368 add_obsolete_inner( name, CONFIG_ITEM_STRING )
370 /* Modifier macros for the config options (used for fine tuning) */
372 #define add_deprecated_alias( name ) \
373 vlc_config_set (p_config, VLC_CONFIG_OLDNAME, (const char *)(name))
375 #define change_short( ch ) \
376 vlc_config_set (p_config, VLC_CONFIG_SHORTCUT, (int)(ch))
378 #define change_string_list( list, list_text, list_update_func ) \
379 vlc_config_set (p_config, VLC_CONFIG_LIST, \
380 (size_t)(sizeof (list) / sizeof (char *)), \
381 (const char *const *)(list), \
382 (const char *const *)(list_text), \
385 #define change_integer_list( list, list_text, list_update_func ) \
386 vlc_config_set (p_config, VLC_CONFIG_LIST, \
387 (size_t)(sizeof (list) / sizeof (int)), \
388 (const int *)(list), \
389 (const char *const *)(list_text), \
392 #define change_float_list( list, list_text, list_update_func ) \
393 vlc_config_set (p_config, VLC_CONFIG_LIST, \
394 (size_t)(sizeof (list) / sizeof (float)), \
395 (const float *)(list), \
396 (const char *const *)(list_text), \
399 #define change_integer_range( minv, maxv ) \
400 vlc_config_set (p_config, VLC_CONFIG_RANGE, (int)(minv), (int)(maxv))
402 #define change_float_range( minv, maxv ) \
403 vlc_config_set (p_config, VLC_CONFIG_RANGE, \
404 (double)(minv), (double)(maxv))
406 #define change_action_add( pf_action, text ) \
407 vlc_config_set (p_config, VLC_CONFIG_ADD_ACTION, \
408 (vlc_callback_t)(pf_action), (const char *)(text))
410 #define change_internal() \
411 vlc_config_set (p_config, VLC_CONFIG_PRIVATE)
413 #define change_need_restart() \
414 vlc_config_set (p_config, VLC_CONFIG_RESTART)
416 #define change_autosave() \
417 vlc_config_set (p_config, VLC_CONFIG_PERSISTENT)
419 #define change_unsaveable() \
420 vlc_config_set (p_config, VLC_CONFIG_VOLATILE)
422 #define change_unsafe() (void)0 /* no-op */
424 #define change_safe() \
425 vlc_config_set (p_config, VLC_CONFIG_SAFE)