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
74 #if defined( __cplusplus )
75 # define EXTERN_SYMBOL extern "C"
77 # define EXTERN_SYMBOL
81 * InitModule: this function is called once and only once, when the module
82 * is looked at for the first time. We get the useful data from it, for
83 * instance the module name, its shortcuts, its capabilities... we also create
84 * a copy of its config because the module can be unloaded at any time.
86 #if defined (__PLUGIN__) || defined (__BUILTIN__)
87 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL
88 E_(vlc_entry) ( module_t *p_module );
91 #define vlc_module_begin( ) \
92 EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
93 __VLC_SYMBOL(vlc_entry) ( module_t *p_module ) \
95 module_config_t *p_config = NULL; \
96 if (vlc_module_set (p_module, VLC_MODULE_NAME, \
97 (const char *)(MODULE_STRING))) \
100 module_t *p_submodule = p_module /* the ; gets added */
102 #define vlc_module_end( ) \
105 return VLC_SUCCESS; \
108 return VLC_EGENERIC; \
110 struct _u_n_u_s_e_d_ /* the ; gets added */
113 #define add_submodule( ) \
114 p_submodule = vlc_submodule_create( p_module )
116 #define add_requirement( cap ) \
117 if (vlc_module_set (p_module, VLC_MODULE_CPU_REQUIREMENT, \
118 (int)(CPU_CAPABILITY_##cap))) \
121 #define add_shortcut( shortcut ) \
122 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTCUT, \
123 (const char *)(shortcut))) \
126 #define set_shortname( shortname ) \
127 if (vlc_module_set (p_submodule, VLC_MODULE_SHORTNAME, \
128 (const char *)(shortname))) \
131 #define set_description( desc ) \
132 if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, \
133 (const char *)(desc))) \
136 #define set_help( help ) \
137 if (vlc_module_set (p_submodule, VLC_MODULE_HELP, (const char *)(help))) \
140 #define set_capability( cap, score ) \
141 if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, \
142 (const char *)(cap)) \
143 || vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
146 #define set_callbacks( activate, deactivate ) \
147 if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
148 || vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
151 #define linked_with_a_crap_library_which_uses_atexit( ) \
152 if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
155 VLC_EXPORT( module_t *, vlc_module_create, ( vlc_object_t * ) );
156 VLC_EXPORT( module_t *, vlc_submodule_create, ( module_t * ) );
157 VLC_EXPORT( int, vlc_module_set, (module_t *module, int propid, ...) );
158 VLC_EXPORT( module_config_t *, vlc_config_create, (module_t *, int type) );
159 VLC_EXPORT( int, vlc_config_set, (module_config_t *, int, ...) );
161 enum vlc_module_properties
163 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
164 * Append new items at the end ONLY. */
165 VLC_MODULE_CPU_REQUIREMENT,
167 VLC_MODULE_SHORTNAME,
168 VLC_MODULE_DESCRIPTION,
170 VLC_MODULE_CAPABILITY,
175 VLC_MODULE_NO_UNLOAD,
179 enum vlc_config_properties
181 /* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
182 * Append new items at the end ONLY. */
185 /* command line name (args=const char *, vlc_callback_t) */
188 /* description (args=const char *, const char *) */
191 /* actual value (args=int/double/const char *) */
194 /* minimum value (args=int/double/const char * twice) */
197 /* enable advanced flag (args=none) */
200 /* don't write variable to storage (args=none) */
202 VLC_CONFIG_PERSISTENT,
203 /* always write variable to storage (args=none) */
206 /* restart required to apply value change (args=none) */
209 /* hide from user (args=none) */
212 /* tag as no longer supported (args=none) */
214 VLC_CONFIG_CAPABILITY,
215 /* capability for a module or list thereof (args=const char*) */
218 /* one-character (short) command line option name (args=char) */
221 /* possible values list
222 * (args=size_t, const <type> *, const char *const *) */
224 VLC_CONFIG_ADD_ACTION,
225 /* add value change callback (args=vlc_callback_t, const char *) */
228 /* former option name (args=const char *) */
231 /* tag as modifiable by untrusted input item "sources" (args=none) */
234 /*****************************************************************************
235 * Macros used to build the configuration structure.
237 * Note that internally we support only 3 types of config data: int, float
239 * The other types declared here just map to one of these 3 basic types but
240 * have the advantage of also providing very good hints to a configuration
241 * interface so as to make it more user friendly.
242 * The configuration structure also includes category hints. These hints can
243 * provide a configuration interface with some very useful data and again
244 * allow for a more user friendly interface.
245 *****************************************************************************/
247 #define add_type_inner( type ) \
248 p_config = vlc_config_create (p_module, type)
250 #define add_typedesc_inner( type, text, longtext ) \
251 add_type_inner( type ); \
252 vlc_config_set (p_config, VLC_CONFIG_DESC, \
253 (const char *)(text), (const char *)(longtext))
255 #define add_typeadv_inner( type, text, longtext, advc ) \
256 add_typedesc_inner( type, text, longtext ); \
257 if (advc) vlc_config_set (p_config, VLC_CONFIG_ADVANCED)
259 #define add_typename_inner( type, name, text, longtext, advc, cb ) \
260 add_typeadv_inner( type, text, longtext, advc ); \
261 vlc_config_set (p_config, VLC_CONFIG_NAME, \
262 (const char *)(name), (vlc_callback_t)(cb))
264 #define add_string_inner( type, name, text, longtext, advc, cb, v ) \
265 add_typename_inner( type, name, text, longtext, advc, cb ); \
266 vlc_config_set (p_config, VLC_CONFIG_VALUE, (const char *)(v))
268 #define add_int_inner( type, name, text, longtext, advc, cb, v ) \
269 add_typename_inner( type, name, text, longtext, advc, cb ); \
270 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(v))
273 #define set_category( i_id ) \
274 add_type_inner( CONFIG_CATEGORY ); \
275 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
277 #define set_subcategory( i_id ) \
278 add_type_inner( CONFIG_SUBCATEGORY ); \
279 vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id))
281 #define set_section( text, longtext ) \
282 add_typedesc_inner( CONFIG_SECTION, text, longtext )
284 #define add_category_hint( text, longtext, advc ) \
285 add_typeadv_inner( CONFIG_HINT_CATEGORY, text, longtext, advc )
287 #define add_subcategory_hint( text, longtext ) \
288 add_typedesc_inner( CONFIG_HINT_SUBCATEGORY, text, longtext )
290 #define end_subcategory_hint \
291 add_type_inner( CONFIG_HINT_SUBCATEGORY_END )
293 #define add_usage_hint( text ) \
294 add_typedesc_inner( CONFIG_HINT_USAGE, text, NULL )
296 #define add_string( name, value, p_callback, text, longtext, advc ) \
297 add_string_inner( CONFIG_ITEM_STRING, name, text, longtext, advc, p_callback, value )
299 #define add_password( name, value, p_callback, text, longtext, advc ) \
300 add_string_inner( CONFIG_ITEM_PASSWORD, name, text, longtext, advc, p_callback, value )
302 #define add_file( name, value, p_callback, text, longtext, advc ) \
303 add_string_inner( CONFIG_ITEM_FILE, name, text, longtext, advc, p_callback, value )
305 #define add_directory( name, value, p_callback, text, longtext, advc ) \
306 add_string_inner( CONFIG_ITEM_DIRECTORY, name, text, longtext, advc, p_callback, value )
308 #define add_module( name, psz_caps, value, p_callback, text, longtext, advc ) \
309 add_string_inner( CONFIG_ITEM_MODULE, name, text, longtext, advc, p_callback, value ); \
310 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
312 #define add_module_list( name, psz_caps, value, p_callback, text, longtext, advc ) \
313 add_string_inner( CONFIG_ITEM_MODULE_LIST, name, text, longtext, advc, p_callback, value ); \
314 vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps))
317 #define add_module_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
318 add_string_inner( CONFIG_ITEM_MODULE_CAT, name, text, longtext, advc, p_callback, value ); \
319 p_config->min.i = i_subcategory /* gruik */
321 #define add_module_list_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
322 add_string_inner( CONFIG_ITEM_MODULE_LIST_CAT, name, text, longtext, advc, p_callback, value ); \
323 p_config->min.i = i_subcategory /* gruik */
326 #define add_integer( name, value, p_callback, text, longtext, advc ) \
327 add_int_inner( CONFIG_ITEM_INTEGER, name, text, longtext, advc, p_callback, value )
329 #define add_key( name, value, p_callback, text, longtext, advc ) \
330 add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, p_callback, value )
332 #define add_integer_with_range( name, value, i_min, i_max, p_callback, text, longtext, advc ) \
333 add_integer( name, value, p_callback, text, longtext, advc ); \
334 change_integer_range( i_min, i_max )
336 #define add_float( name, v, p_callback, text, longtext, advc ) \
337 add_typename_inner( CONFIG_ITEM_FLOAT, name, text, longtext, advc, p_callback ); \
338 vlc_config_set (p_config, VLC_CONFIG_VALUE, (double)(v))
340 #define add_float_with_range( name, value, f_min, f_max, p_callback, text, longtext, advc ) \
341 add_float( name, value, p_callback, text, longtext, advc ); \
342 change_float_range( f_min, f_max )
344 #define add_bool( name, v, p_callback, text, longtext, advc ) \
345 add_typename_inner( CONFIG_ITEM_BOOL, name, text, longtext, advc, p_callback ); \
346 if (v) vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)true)
348 /* For removed option */
349 #define add_obsolete_inner( name, type ) \
350 add_type_inner( type ); \
351 vlc_config_set (p_config, VLC_CONFIG_NAME, \
352 (const char *)(name), (vlc_callback_t)NULL); \
353 vlc_config_set (p_config, VLC_CONFIG_REMOVED)
355 #define add_obsolete_bool( name ) \
356 add_obsolete_inner( name, CONFIG_ITEM_BOOL )
358 #define add_obsolete_integer( name ) \
359 add_obsolete_inner( name, CONFIG_ITEM_INTEGER )
361 #define add_obsolete_float( name ) \
362 add_obsolete_inner( name, CONFIG_ITEM_FLOAT )
364 #define add_obsolete_string( name ) \
365 add_obsolete_inner( name, CONFIG_ITEM_STRING )
367 /* Modifier macros for the config options (used for fine tuning) */
369 #define add_deprecated_alias( name ) \
370 vlc_config_set (p_config, VLC_CONFIG_OLDNAME, (const char *)(name))
372 #define change_short( ch ) \
373 vlc_config_set (p_config, VLC_CONFIG_SHORTCUT, (int)(ch))
375 #define change_string_list( list, list_text, list_update_func ) \
376 vlc_config_set (p_config, VLC_CONFIG_LIST, \
377 (size_t)(sizeof (list) / sizeof (char *)), \
378 (const char *const *)(list), \
379 (const char *const *)(list_text), \
382 #define change_integer_list( list, list_text, list_update_func ) \
383 vlc_config_set (p_config, VLC_CONFIG_LIST, \
384 (size_t)(sizeof (list) / sizeof (int)), \
385 (const int *)(list), \
386 (const char *const *)(list_text), \
389 #define change_float_list( list, list_text, list_update_func ) \
390 vlc_config_set (p_config, VLC_CONFIG_LIST, \
391 (size_t)(sizeof (list) / sizeof (float)), \
392 (const float *)(list), \
393 (const char *const *)(list_text), \
396 #define change_integer_range( minv, maxv ) \
397 vlc_config_set (p_config, VLC_CONFIG_RANGE, (int)(minv), (int)(maxv))
399 #define change_float_range( minv, maxv ) \
400 vlc_config_set (p_config, VLC_CONFIG_RANGE, \
401 (double)(minv), (double)(maxv))
403 #define change_action_add( pf_action, text ) \
404 vlc_config_set (p_config, VLC_CONFIG_ADD_ACTION, \
405 (vlc_callback_t)(pf_action), (const char *)(text))
407 #define change_internal() \
408 vlc_config_set (p_config, VLC_CONFIG_PRIVATE)
410 #define change_need_restart() \
411 vlc_config_set (p_config, VLC_CONFIG_RESTART)
413 #define change_autosave() \
414 vlc_config_set (p_config, VLC_CONFIG_PERSISTENT)
416 #define change_unsaveable() \
417 vlc_config_set (p_config, VLC_CONFIG_VOLATILE)
419 #define change_unsafe() (void)0 /* no-op */
421 #define change_safe() \
422 vlc_config_set (p_config, VLC_CONFIG_SAFE)