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vlc/include/vlc_plugin.h

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/*****************************************************************************
* vlc_plugin.h : Macros used from within a module.
*****************************************************************************
* Copyright (C) 2001-2006 the VideoLAN team
* Copyright © 2007-2009 Rémi Denis-Courmont
*
* Authors: Samuel Hocevar <sam@zoy.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifndef LIBVLC_MODULES_MACROS_H
# define LIBVLC_MODULES_MACROS_H 1
/**
* \file
* This file implements plugin (module) macros used to define a vlc module.
*/
VLC_EXPORT( int, vlc_plugin_set, (module_t *, module_config_t *, int, ...) );
#define vlc_module_set( mod, ... ) vlc_plugin_set ((mod), NULL, __VA_ARGS__)
#define vlc_config_set( cfg, ... ) vlc_plugin_set (NULL, (cfg), __VA_ARGS__)
enum vlc_module_properties
{
VLC_SUBMODULE_CREATE,
VLC_CONFIG_CREATE,
/* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
* Append new items at the end ONLY. */
VLC_MODULE_CPU_REQUIREMENT=0x100,
VLC_MODULE_SHORTCUT,
VLC_MODULE_CAPABILITY,
VLC_MODULE_SCORE,
VLC_MODULE_CB_OPEN,
VLC_MODULE_CB_CLOSE,
VLC_MODULE_NO_UNLOAD,
VLC_MODULE_NAME,
VLC_MODULE_SHORTNAME,
VLC_MODULE_DESCRIPTION,
VLC_MODULE_HELP,
/* Insert new VLC_MODULE_* here */
/* DO NOT EVER REMOVE, INSERT OR REPLACE ANY ITEM! It would break the ABI!
* Append new items at the end ONLY. */
VLC_CONFIG_NAME=0x1000,
/* command line name (args=const char *, vlc_callback_t) */
VLC_CONFIG_VALUE,
/* actual value (args=int/double/const char *) */
VLC_CONFIG_RANGE,
/* minimum value (args=int/double/const char * twice) */
VLC_CONFIG_ADVANCED,
/* enable advanced flag (args=none) */
VLC_CONFIG_VOLATILE,
/* don't write variable to storage (args=none) */
VLC_CONFIG_PERSISTENT,
/* always write variable to storage (args=none) */
VLC_CONFIG_RESTART,
/* restart required to apply value change (args=none) */
VLC_CONFIG_PRIVATE,
/* hide from user (args=none) */
VLC_CONFIG_REMOVED,
/* tag as no longer supported (args=none) */
VLC_CONFIG_CAPABILITY,
/* capability for a module or list thereof (args=const char*) */
VLC_CONFIG_SHORTCUT,
/* one-character (short) command line option name (args=char) */
VLC_CONFIG_OLDNAME,
/* former option name (args=const char *) */
VLC_CONFIG_SAFE,
/* tag as modifiable by untrusted input item "sources" (args=none) */
VLC_CONFIG_DESC,
/* description (args=const char *, const char *, const char *) */
VLC_CONFIG_LIST,
/* possible values list
* (args=const char *, size_t, const <type> *, const char *const *) */
VLC_CONFIG_ADD_ACTION,
/* add value change callback
* (args=const char *, vlc_callback_t, const char *) */
/* Insert new VLC_CONFIG_* here */
};
/*****************************************************************************
* If we are not within a module, assume we're in the vlc core.
*****************************************************************************/
#if !defined( __PLUGIN__ ) && !defined( __BUILTIN__ )
# define MODULE_NAME main
#endif
/**
* Current plugin ABI version
*/
# define MODULE_SYMBOL 1_1_0a
# define MODULE_SUFFIX "__1_1_0a"
/*****************************************************************************
* Add a few defines. You do not want to read this section. Really.
*****************************************************************************/
/* Explanation:
*
* if linking a module statically, we will need:
* #define MODULE_FUNC( zog ) module_foo_zog
*
* this can't easily be done with the C preprocessor, thus a few ugly hacks.
*/
/* I need to do _this_ to change « foo bar » to « module_foo_bar » ! */
#define CONCATENATE( y, z ) CRUDE_HACK( y, z )
#define CRUDE_HACK( y, z ) y##__##z
/* If the module is built-in, then we need to define foo_InitModule instead
* of InitModule. Same for Activate- and DeactivateModule. */
#ifdef __PLUGIN__
# define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_SYMBOL )
#else
# define __VLC_SYMBOL( symbol ) CONCATENATE( symbol, MODULE_NAME )
#endif
#if defined( __PLUGIN__ ) && ( defined( WIN32 ) || defined( UNDER_CE ) )
# define DLL_SYMBOL __declspec(dllexport)
# define CDECL_SYMBOL __cdecl
#else
# define DLL_SYMBOL
# define CDECL_SYMBOL
#endif
#if defined( __cplusplus )
# define EXTERN_SYMBOL extern "C"
#else
# define EXTERN_SYMBOL
#endif
/*
* InitModule: this function is called once and only once, when the module
* is looked at for the first time. We get the useful data from it, for
* instance the module name, its shortcuts, its capabilities... we also create
* a copy of its config because the module can be unloaded at any time.
*/
#define vlc_module_begin( ) \
EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
__VLC_SYMBOL(vlc_entry) ( module_t *p_module ); \
\
EXTERN_SYMBOL DLL_SYMBOL int CDECL_SYMBOL \
__VLC_SYMBOL(vlc_entry) ( module_t *p_module ) \
{ \
module_config_t *p_config = NULL; \
const char *domain = NULL; \
if (vlc_module_set (p_module, VLC_MODULE_NAME, \
(const char *)(MODULE_STRING))) \
goto error; \
{ \
module_t *p_submodule = p_module;
#define vlc_module_end( ) \
} \
(void)p_config; \
return VLC_SUCCESS; \
\
error: \
return VLC_EGENERIC; \
} \
VLC_METADATA_EXPORTS
#define add_submodule( ) \
if (vlc_plugin_set (p_module, NULL, VLC_SUBMODULE_CREATE, &p_submodule)) \
goto error;
#define add_requirement( cap ) \
if (vlc_module_set (p_module, VLC_MODULE_CPU_REQUIREMENT, \
(int)(CPU_CAPABILITY_##cap))) \
goto error;
#define add_shortcut( shortcut ) \
if (vlc_module_set (p_submodule, VLC_MODULE_SHORTCUT, \
(const char *)(shortcut))) \
goto error;
#define set_shortname( shortname ) \
if (vlc_module_set (p_submodule, VLC_MODULE_SHORTNAME, domain, \
(const char *)(shortname))) \
goto error;
#define set_description( desc ) \
if (vlc_module_set (p_submodule, VLC_MODULE_DESCRIPTION, domain, \
(const char *)(desc))) \
goto error;
#define set_help( help ) \
if (vlc_module_set (p_submodule, VLC_MODULE_HELP, domain, \
(const char *)(help))) \
goto error;
#define set_capability( cap, score ) \
if (vlc_module_set (p_submodule, VLC_MODULE_CAPABILITY, \
(const char *)(cap)) \
|| vlc_module_set (p_submodule, VLC_MODULE_SCORE, (int)(score))) \
goto error;
#define set_callbacks( activate, deactivate ) \
if (vlc_module_set (p_submodule, VLC_MODULE_CB_OPEN, activate) \
|| vlc_module_set (p_submodule, VLC_MODULE_CB_CLOSE, deactivate)) \
goto error;
#define linked_with_a_crap_library_which_uses_atexit( ) \
if (vlc_module_set (p_submodule, VLC_MODULE_NO_UNLOAD)) \
goto error;
#define set_text_domain( dom ) domain = (dom);
/*****************************************************************************
* Macros used to build the configuration structure.
*
* Note that internally we support only 3 types of config data: int, float
* and string.
* The other types declared here just map to one of these 3 basic types but
* have the advantage of also providing very good hints to a configuration
* interface so as to make it more user friendly.
* The configuration structure also includes category hints. These hints can
* provide a configuration interface with some very useful data and again
* allow for a more user friendly interface.
*****************************************************************************/
#define add_type_inner( type ) \
vlc_plugin_set (p_module, NULL, VLC_CONFIG_CREATE, (type), &p_config);
#define add_typedesc_inner( type, text, longtext ) \
add_type_inner( type ) \
vlc_config_set (p_config, VLC_CONFIG_DESC, domain, \
(const char *)(text), (const char *)(longtext));
#define add_typeadv_inner( type, text, longtext, advc ) \
add_typedesc_inner( type, text, longtext ) \
if (advc) vlc_config_set (p_config, VLC_CONFIG_ADVANCED);
#define add_typename_inner( type, name, text, longtext, advc, cb ) \
add_typeadv_inner( type, text, longtext, advc ) \
vlc_config_set (p_config, VLC_CONFIG_NAME, \
(const char *)(name), (vlc_callback_t)(cb));
#define add_string_inner( type, name, text, longtext, advc, cb, v ) \
add_typename_inner( type, name, text, longtext, advc, cb ) \
vlc_config_set (p_config, VLC_CONFIG_VALUE, (const char *)(v));
#define add_int_inner( type, name, text, longtext, advc, cb, v ) \
add_typename_inner( type, name, text, longtext, advc, cb ) \
vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(v));
#define set_category( i_id ) \
add_type_inner( CONFIG_CATEGORY ) \
vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id));
#define set_subcategory( i_id ) \
add_type_inner( CONFIG_SUBCATEGORY ) \
vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)(i_id));
#define set_section( text, longtext ) \
add_typedesc_inner( CONFIG_SECTION, text, longtext )
#define add_category_hint( text, longtext, advc ) \
add_typeadv_inner( CONFIG_HINT_CATEGORY, text, longtext, advc )
#define add_subcategory_hint( text, longtext ) \
add_typedesc_inner( CONFIG_HINT_SUBCATEGORY, text, longtext )
#define end_subcategory_hint \
add_type_inner( CONFIG_HINT_SUBCATEGORY_END )
#define add_usage_hint( text ) \
add_typedesc_inner( CONFIG_HINT_USAGE, text, NULL )
#define add_string( name, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_STRING, name, text, longtext, advc, \
p_callback, value )
#define add_password( name, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_PASSWORD, name, text, longtext, advc, \
p_callback, value )
#define add_file( name, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_FILE, name, text, longtext, advc, \
p_callback, value )
#define add_directory( name, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_DIRECTORY, name, text, longtext, advc, \
p_callback, value )
#define add_font( name, value, p_callback, text, longtext, advc )\
add_string_inner( CONFIG_ITEM_FONT, name, text, longtext, advc, \
p_callback, value )
#define add_module( name, psz_caps, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_MODULE, name, text, longtext, advc, \
p_callback, value ) \
vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps));
#define add_module_list( name, psz_caps, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_MODULE_LIST, name, text, longtext, advc, \
p_callback, value ) \
vlc_config_set (p_config, VLC_CONFIG_CAPABILITY, (const char *)(psz_caps));
#ifndef __PLUGIN__
#define add_module_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_MODULE_CAT, name, text, longtext, advc, \
p_callback, value ) \
change_integer_range (i_subcategory /* gruik */, 0);
#define add_module_list_cat( name, i_subcategory, value, p_callback, text, longtext, advc ) \
add_string_inner( CONFIG_ITEM_MODULE_LIST_CAT, name, text, longtext, \
advc, p_callback, value ) \
change_integer_range (i_subcategory /* gruik */, 0);
#endif
#define add_integer( name, value, p_callback, text, longtext, advc ) \
add_int_inner( CONFIG_ITEM_INTEGER, name, text, longtext, advc, \
p_callback, value )
#if !defined(WIN32) && !defined(SYS_LINUX)
#define add_key( name, value, p_callback, text, longtext, advc ) \
add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, p_callback, \
value )
#else
#define add_key( name, value, p_callback, text, longtext, advc ) \
add_int_inner( CONFIG_ITEM_KEY, name, text, longtext, advc, \
p_callback, value ) \
add_int_inner( CONFIG_ITEM_KEY, "global-" name, text, longtext, advc, \
p_callback, KEY_UNSET )
#endif
#define add_integer_with_range( name, value, i_min, i_max, p_callback, text, longtext, advc ) \
add_integer( name, value, p_callback, text, longtext, advc ) \
change_integer_range( i_min, i_max )
#define add_float( name, v, p_callback, text, longtext, advc ) \
add_typename_inner( CONFIG_ITEM_FLOAT, name, text, longtext, advc, p_callback ) \
vlc_config_set (p_config, VLC_CONFIG_VALUE, (double)(v));
#define add_float_with_range( name, value, f_min, f_max, p_callback, text, longtext, advc ) \
add_float( name, value, p_callback, text, longtext, advc ) \
change_float_range( f_min, f_max )
#define add_bool( name, v, p_callback, text, longtext, advc ) \
add_typename_inner( CONFIG_ITEM_BOOL, name, text, longtext, advc, \
p_callback ) \
if (v) vlc_config_set (p_config, VLC_CONFIG_VALUE, (int)true);
/* For removed option */
#define add_obsolete_inner( name, type ) \
add_type_inner( type ) \
vlc_config_set (p_config, VLC_CONFIG_NAME, \
(const char *)(name), (vlc_callback_t)NULL); \
vlc_config_set (p_config, VLC_CONFIG_REMOVED);
#define add_obsolete_bool( name ) \
add_obsolete_inner( name, CONFIG_ITEM_BOOL )
#define add_obsolete_integer( name ) \
add_obsolete_inner( name, CONFIG_ITEM_INTEGER )
#define add_obsolete_float( name ) \
add_obsolete_inner( name, CONFIG_ITEM_FLOAT )
#define add_obsolete_string( name ) \
add_obsolete_inner( name, CONFIG_ITEM_STRING )
/* Modifier macros for the config options (used for fine tuning) */
#define add_deprecated_alias( name ) \
vlc_config_set (p_config, VLC_CONFIG_OLDNAME, (const char *)(name));
#define change_short( ch ) \
vlc_config_set (p_config, VLC_CONFIG_SHORTCUT, (int)(ch));
#define change_string_list( list, list_text, list_update_func ) \
vlc_config_set (p_config, VLC_CONFIG_LIST, domain, \
(size_t)(sizeof (list) / sizeof (char *)), \
(const char *const *)(list), \
(const char *const *)(list_text), \
(vlc_callback_t)(list_update_func));
#define change_integer_list( list, list_text, list_update_func ) \
vlc_config_set (p_config, VLC_CONFIG_LIST, domain, \
(size_t)(sizeof (list) / sizeof (int)), \
(const int *)(list), \
(const char *const *)(list_text), \
(vlc_callback_t)(list_update_func));
#define change_integer_range( minv, maxv ) \
vlc_config_set (p_config, VLC_CONFIG_RANGE, (int)(minv), (int)(maxv));
#define change_float_range( minv, maxv ) \
vlc_config_set (p_config, VLC_CONFIG_RANGE, \
(double)(minv), (double)(maxv));
#define change_action_add( pf_action, text ) \
vlc_config_set (p_config, VLC_CONFIG_ADD_ACTION, domain, \
(vlc_callback_t)(pf_action), (const char *)(text));
#define change_internal() \
vlc_config_set (p_config, VLC_CONFIG_PRIVATE);
#define change_need_restart() \
vlc_config_set (p_config, VLC_CONFIG_RESTART);
#define change_autosave() \
vlc_config_set (p_config, VLC_CONFIG_PERSISTENT);
#define change_unsaveable() \
vlc_config_set (p_config, VLC_CONFIG_VOLATILE);
#define change_safe() \
vlc_config_set (p_config, VLC_CONFIG_SAFE);
/* Meta data plugin exports */
#define VLC_META_EXPORT( name, value ) \
EXTERN_SYMBOL DLL_SYMBOL const char * CDECL_SYMBOL \
__VLC_SYMBOL(vlc_entry_ ## name) (void); \
EXTERN_SYMBOL DLL_SYMBOL const char * CDECL_SYMBOL \
__VLC_SYMBOL(vlc_entry_ ## name) (void) \
{ \
return value; \
}
#if defined (__LIBVLC__)
# define VLC_COPYRIGHT_EXPORT VLC_META_EXPORT (copyright, \
"\x43\x6f\x70\x79\x72\x69\x67\x68\x74\x20\x28\x43\x29\x20\x74\x68" \
"\x65\x20\x56\x69\x64\x65\x6f\x4c\x41\x4e\x20\x56\x4c\x43\x20\x6d" \
"\x65\x64\x69\x61\x20\x70\x6c\x61\x79\x65\x72\x20\x64\x65\x76\x65" \
"\x6c\x6f\x70\x65\x72\x73" )
#elif !defined (VLC_COPYRIGHT_EXPORT)
# define VLC_COPYRIGHT_EXPORT
#endif
#define VLC_LICENSE_EXPORT VLC_META_EXPORT (license, \
"\x4c\x69\x63\x65\x6e\x73\x65\x64\x20\x75\x6e\x64\x65\x72\x20\x74" \
"\x68\x65\x20\x74\x65\x72\x6d\x73\x20\x6f\x66\x20\x74\x68\x65\x20" \
"\x47\x4e\x55\x20\x47\x65\x6e\x65\x72\x61\x6c\x20\x50\x75\x62\x6c" \
"\x69\x63\x20\x4c\x69\x63\x65\x6e\x73\x65\x2c\x20\x76\x65\x72\x73" \
"\x69\x6f\x6e\x20\x32\x20\x6f\x72\x20\x6c\x61\x74\x65\x72\x2e" )
#define VLC_METADATA_EXPORTS \
VLC_COPYRIGHT_EXPORT \
VLC_LICENSE_EXPORT
#endif
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