variables.h
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上传日期:2020-07-06
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文件大小:3k
源码类别:
midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * variables.h: object variables typedefs
- *****************************************************************************
- * Copyright (C) 2002-2006 the VideoLAN team
- * $Id: dde10ae654e2ecba9b70755df9b5f8d77170aafc $
- *
- * 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.
- *****************************************************************************/
- #if defined(__PLUGIN__) || defined(__BUILTIN__) || !defined(__LIBVLC__)
- # error This header file can only be included from LibVLC.
- #endif
- #ifndef __LIBVLC_VARIABLES_H
- # define __LIBVLC_VARIABLES_H 1
- typedef struct callback_entry_t callback_entry_t;
- typedef struct variable_ops_t
- {
- int (*pf_cmp) ( vlc_value_t, vlc_value_t );
- void (*pf_dup) ( vlc_value_t * );
- void (*pf_free) ( vlc_value_t * );
- } variable_ops_t;
- /**
- * The structure describing a variable.
- * note vlc_value_t is the common union for variable values
- */
- struct variable_t
- {
- /** The variable's exported value */
- vlc_value_t val;
- char * psz_name; /**< The variable unique name */
- uint32_t i_hash; /**< (almost) unique hashed value */
- int i_type; /**< The type of the variable */
- /** The variable display name, mainly for use by the interfaces */
- char * psz_text;
- const variable_ops_t *ops;
- /** Creation count: we only destroy the variable if it reaches 0 */
- int i_usage;
- /** If the variable has min/max/step values */
- vlc_value_t min, max, step;
- /** Index of the default choice, if the variable is to be chosen in
- * a list */
- int i_default;
- /** List of choices */
- vlc_list_t choices;
- /** List of friendly names for the choices */
- vlc_list_t choices_text;
- /** Set to TRUE if the variable is in a callback */
- bool b_incallback;
- /** Number of registered callbacks */
- int i_entries;
- /** Array of registered callbacks */
- callback_entry_t * p_entries;
- };
- #endif