/*****************************************************************************
* variables.h: variables handling
*****************************************************************************
- * Copyright (C) 2002 VideoLAN
- * $Id: variables.h,v 1.1 2002/10/11 11:05:52 sam Exp $
+ * Copyright (C) 2002-2004 VideoLAN
+ * $Id: variables.h,v 1.21 2004/01/09 22:11:04 hartman Exp $
*
* Authors: Samuel Hocevar <sam@zoy.org>
+ * Gildas Bazin <gbazin@netcourrier.com>
*
* 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
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
*****************************************************************************/
-/* Variable types - probably very incomplete */
-#define VLC_VAR_BOOL 0x0100
-#define VLC_VAR_INTEGER 0x0200
-#define VLC_VAR_STRING 0x0300
-#define VLC_VAR_MODULE 0x0301
-#define VLC_VAR_FILE 0x0302
-#define VLC_VAR_FLOAT 0x0400
-#define VLC_VAR_TIME 0x0500
-#define VLC_VAR_ADDRESS 0x0600
+/**
+ * \defgroup variables Variables
+ *
+ * Functions for using the object variables in vlc.
+ *
+ * Vlc have a very powerful "object variable" infrastructure useful
+ * for many things.
+ *
+ * @{
+ */
-/*****************************************************************************
- * vlc_value_t is the common union for variable values; variable_t is the
- * structure describing a variable.
- *****************************************************************************/
+typedef struct callback_entry_t callback_entry_t;
+
+/**
+ * The structure describing a variable.
+ * \note vlc_value_t is the common union for variable values
+ */
struct variable_t
{
- u32 i_hash;
- char * psz_name;
-
- int i_type;
+ /** The variable's exported value */
vlc_value_t val;
- /* Lots of other things that can be added */
- vlc_bool_t b_set;
- vlc_bool_t b_active;
+ 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;
+
+ /** A pointer to a comparison function */
+ int ( * pf_cmp ) ( vlc_value_t, vlc_value_t );
+ /** A pointer to a duplication function */
+ void ( * pf_dup ) ( vlc_value_t * );
+ /** A pointer to a deallocation function */
+ void ( * pf_free ) ( vlc_value_t * );
+
+ /** 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 */
+ vlc_bool_t b_incallback;
+
+ /** Number of registered callbacks */
+ int i_entries;
+ /** Array of registered callbacks */
+ callback_entry_t * p_entries;
};
+/*****************************************************************************
+ * Variable types - probably very incomplete
+ *****************************************************************************/
+#define VLC_VAR_TYPE 0x00ff
+#define VLC_VAR_FLAGS 0xff00
+
+/**
+ * \defgroup var_type Variable types
+ * These are the different types a vlc variable can have.
+ * @{
+ */
+#define VLC_VAR_VOID 0x0010
+#define VLC_VAR_BOOL 0x0020
+#define VLC_VAR_INTEGER 0x0030
+#define VLC_VAR_HOTKEY 0x0031
+#define VLC_VAR_STRING 0x0040
+#define VLC_VAR_MODULE 0x0041
+#define VLC_VAR_FILE 0x0042
+#define VLC_VAR_DIRECTORY 0x0043
+#define VLC_VAR_VARIABLE 0x0044
+#define VLC_VAR_FLOAT 0x0050
+#define VLC_VAR_TIME 0x0060
+#define VLC_VAR_ADDRESS 0x0070
+#define VLC_VAR_MUTEX 0x0080
+#define VLC_VAR_LIST 0x0090
+/**@}*/
+/** \defgroup var_flags Additive flags
+ * These flags are added to the type field of the variable. Most as a result of
+ * a __var_Change() call, but some may be added at creation time
+ * @{
+ */
+#define VLC_VAR_HASCHOICE 0x0100
+#define VLC_VAR_HASMIN 0x0200
+#define VLC_VAR_HASMAX 0x0400
+#define VLC_VAR_HASSTEP 0x0800
+
+#define VLC_VAR_ISLIST 0x1000
+#define VLC_VAR_ISCOMMAND 0x2000
+#define VLC_VAR_ISCONFIG 0x2000
+
+/** Creation flag */
+#define VLC_VAR_DOINHERIT 0x8000
+/**@}*/
+
+/**
+ * \defgroup var_action Variable actions
+ * These are the different actions that can be used with __var_Change().
+ * The parameters given are the meaning of the two last parameters of
+ * __var_Change() when this action is being used.
+ * @{
+ */
+
+/**
+ * Set the minimum value of this variable
+ * \param p_val The new minimum value
+ * \param p_val2 Unused
+ */
+#define VLC_VAR_SETMIN 0x0010
+/**
+ * Set the maximum value of this variable
+ * \param p_val The new maximum value
+ * \param p_val2 Unused
+ */
+#define VLC_VAR_SETMAX 0x0011
+#define VLC_VAR_SETSTEP 0x0012
+
+/**
+ * Set the value of this variable without triggering any callbacks
+ * \param p_val The new value
+ * \param p_val2 Unused
+ */
+#define VLC_VAR_SETVALUE 0x0013
+
+#define VLC_VAR_SETTEXT 0x0014
+#define VLC_VAR_GETTEXT 0x0015
+
+#define VLC_VAR_ADDCHOICE 0x0020
+#define VLC_VAR_DELCHOICE 0x0021
+#define VLC_VAR_CLEARCHOICES 0x0022
+#define VLC_VAR_SETDEFAULT 0x0023
+#define VLC_VAR_GETCHOICES 0x0024
+#define VLC_VAR_FREECHOICES 0x0025
+#define VLC_VAR_GETLIST 0x0026
+#define VLC_VAR_FREELIST 0x0027
+#define VLC_VAR_CHOICESCOUNT 0x0028
+
+#define VLC_VAR_INHERITVALUE 0x0030
+#define VLC_VAR_TRIGGER_CALLBACKS 0x0035
+/**@}*/
+
/*****************************************************************************
* Prototypes
*****************************************************************************/
-VLC_EXPORT( void, __var_Create, ( vlc_object_t *, const char *, int ) );
-VLC_EXPORT( void, __var_Destroy, ( vlc_object_t *, const char * ) );
+VLC_EXPORT( int, __var_Create, ( vlc_object_t *, const char *, int ) );
+VLC_EXPORT( int, __var_Destroy, ( vlc_object_t *, const char * ) );
+
+VLC_EXPORT( int, __var_Change, ( vlc_object_t *, const char *, int, vlc_value_t *, vlc_value_t * ) );
+VLC_EXPORT( int, __var_Type, ( vlc_object_t *, const char * ) );
VLC_EXPORT( int, __var_Set, ( vlc_object_t *, const char *, vlc_value_t ) );
VLC_EXPORT( int, __var_Get, ( vlc_object_t *, const char *, vlc_value_t * ) );
-#define var_Create(a,b,c) \
- __var_Create( VLC_OBJECT(a), b, c )
+/**
+ * __var_Create() with automatic casting.
+ */
+#define var_Create(a,b,c) __var_Create( VLC_OBJECT(a), b, c )
+/**
+ * __var_Destroy() with automatic casting
+ */
+#define var_Destroy(a,b) __var_Destroy( VLC_OBJECT(a), b )
+
+/**
+ * __var_Change() with automatic casting
+ */
+#define var_Change(a,b,c,d,e) __var_Change( VLC_OBJECT(a), b, c, d, e )
+
+/**
+ * __var_Type() with automatic casting
+ */
+#define var_Type(a,b) __var_Type( VLC_OBJECT(a), b )
+/**
+ * __var_Set() with automatic casting
+ */
+#define var_Set(a,b,c) __var_Set( VLC_OBJECT(a), b, c )
+/**
+ * __var_Get() with automatic casting
+ */
+#define var_Get(a,b,c) __var_Get( VLC_OBJECT(a), b, c )
+
+/*****************************************************************************
+ * Variable callbacks
+ *****************************************************************************
+ * int MyCallback( vlc_object_t *p_this,
+ * char const *psz_variable,
+ * vlc_value_t oldvalue,
+ * vlc_value_t newvalue,
+ * void *p_data);
+ *****************************************************************************/
+VLC_EXPORT( int, __var_AddCallback, ( vlc_object_t *, const char *, vlc_callback_t, void * ) );
+VLC_EXPORT( int, __var_DelCallback, ( vlc_object_t *, const char *, vlc_callback_t, void * ) );
+
+/**
+ * __var_AddCallback() with automatic casting
+ */
+#define var_AddCallback(a,b,c,d) __var_AddCallback( VLC_OBJECT(a), b, c, d )
+
+/**
+ * __var_DelCallback() with automatic casting
+ */
+#define var_DelCallback(a,b,c,d) __var_DelCallback( VLC_OBJECT(a), b, c, d )
+
+/*****************************************************************************
+ * helpers functions
+ *****************************************************************************/
+
+/**
+ * Set the value of an integer variable
+ *
+ * \param p_obj The object that holds the variable
+ * \param psz_name The name of the variable
+ * \param i The new integer value of this variable
+ */
+static inline int __var_SetInteger( vlc_object_t *p_obj, const char *psz_name, int i )
+{
+ vlc_value_t val;
+ val.i_int = i;
+ return __var_Set( p_obj, psz_name, val );
+}
+
+/**
+ * Set the value of a time variable
+ *
+ * \param p_obj The object that holds the variable
+ * \param psz_name The name of the variable
+ * \param i The new time value of this variable
+ */
+static inline int __var_SetTime( vlc_object_t *p_obj, const char *psz_name, int64_t i )
+{
+ vlc_value_t val;
+ val.i_time = i;
+ return __var_Set( p_obj, psz_name, val );
+}
+
+/**
+ * Set the value of a float variable
+ *
+ * \param p_obj The object that holds the variable
+ * \param psz_name The name of the variable
+ * \param f The new float value of this variable
+ */
+static inline int __var_SetFloat( vlc_object_t *p_obj, const char *psz_name, float f )
+{
+ vlc_value_t val;
+ val.f_float = f;
+ return __var_Set( p_obj, psz_name, val );
+}
-#define var_Destroy(a,b) \
- __var_Destroy( VLC_OBJECT(a), b )
+/**
+ * Trigger the callbacks on a void variable
+ *
+ * \param p_obj The object that holds the variable
+ * \param psz_name The name of the variable
+ */
+static inline int __var_SetVoid( vlc_object_t *p_obj, const char *psz_name )
+{
+ vlc_value_t val;
+ val.b_bool = VLC_TRUE;
+ return __var_Set( p_obj, psz_name, val );
+}
-#define var_Set(a,b,c) \
- __var_Set( VLC_OBJECT(a), b, c )
+/**
+ * __var_SetInteger() with automatic casting
+ */
+#define var_SetInteger(a,b,c) __var_SetInteger( VLC_OBJECT(a),b,c)
+/**
+ * __var_SetTime() with automatic casting
+ */
+#define var_SetTime(a,b,c) __var_SetTime( VLC_OBJECT(a),b,c)
+/**
+ * __var_SetFloat() with automatic casting
+ */
+#define var_SetFloat(a,b,c) __var_SetFloat( VLC_OBJECT(a),b,c)
+/**
+ * __var_SetVoid() with automatic casting
+ */
+#define var_SetVoid(a,b) __var_SetVoid( VLC_OBJECT(a),b)
-#define var_Get(a,b,c) \
- __var_Get( VLC_OBJECT(a), b, c )
+/**
+ * @}
+ */
projects / vlc / blobdiff