include/vlc_variables.h

   1 /*****************************************************************************
   2  * variables.h: variables handling
   3  *****************************************************************************
   4  * Copyright (C) 2002-2004 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Samuel Hocevar <sam@zoy.org>
   8  *          Gildas Bazin <gbazin@netcourrier.com>
   9  *
  10  * This program is free software; you can redistribute it and/or modify it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18  * GNU Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifndef VLC_VARIABLES_H
  26 #define VLC_VARIABLES_H 1
  27
  28 /**
  29  * \file
  30  * This file defines functions and structures for dynamic variables in vlc
  31  */
  32
  33 /**
  34  * \defgroup variables Variables
  35  *
  36  * Functions for using the object variables in vlc.
  37  *
  38  * Vlc have a very powerful "object variable" infrastructure useful
  39  * for many things.
  40  *
  41  * @{
  42  */
  43
  44 #define VLC_VAR_TYPE      0x00ff
  45 #define VLC_VAR_CLASS     0x00f0
  46 #define VLC_VAR_FLAGS     0xff00
  47
  48 /**
  49  * \defgroup var_type Variable types
  50  * These are the different types a vlc variable can have.
  51  * @{
  52  */
  53 #define VLC_VAR_VOID      0x0010
  54 #define VLC_VAR_BOOL      0x0020
  55 #define VLC_VAR_INTEGER   0x0030
  56 #define VLC_VAR_HOTKEY    0x0031
  57 #define VLC_VAR_STRING    0x0040
  58 #define VLC_VAR_VARIABLE  0x0044
  59 #define VLC_VAR_FLOAT     0x0050
  60 #define VLC_VAR_TIME      0x0060
  61 #define VLC_VAR_ADDRESS   0x0070
  62 #define VLC_VAR_COORDS    0x00A0
  63 /**@}*/
  64
  65 /** \defgroup var_flags Additive flags
  66  * These flags are added to the type field of the variable. Most as a result of
  67  * a var_Change() call, but some may be added at creation time
  68  * @{
  69  */
  70 #define VLC_VAR_HASCHOICE 0x0100
  71 #define VLC_VAR_HASMIN    0x0200
  72 #define VLC_VAR_HASMAX    0x0400
  73 #define VLC_VAR_HASSTEP   0x0800
  74
  75 #define VLC_VAR_ISCOMMAND 0x2000
  76
  77 /** Creation flag */
  78 /* If the variable is not found on the current module
  79    search all parents and finally module config until found */
  80 #define VLC_VAR_DOINHERIT 0x8000
  81 /**@}*/
  82
  83 /**
  84  * \defgroup var_action Variable actions
  85  * These are the different actions that can be used with var_Change().
  86  * The parameters given are the meaning of the two last parameters of
  87  * var_Change() when this action is being used.
  88  * @{
  89  */
  90
  91 /**
  92  * Set the minimum value of this variable
  93  * \param p_val The new minimum value
  94  * \param p_val2 Unused
  95  */
  96 #define VLC_VAR_SETMIN              0x0010
  97 /**
  98  * Set the maximum value of this variable
  99  * \param p_val The new maximum value
 100  * \param p_val2 Unused
 101  */
 102 #define VLC_VAR_SETMAX              0x0011
 103 #define VLC_VAR_SETSTEP             0x0012
 104
 105 /**
 106  * Set the value of this variable without triggering any callbacks
 107  * \param p_val The new value
 108  * \param p_val2 Unused
 109  */
 110 #define VLC_VAR_SETVALUE            0x0013
 111
 112 #define VLC_VAR_SETTEXT             0x0014
 113 #define VLC_VAR_GETTEXT             0x0015
 114
 115 #define VLC_VAR_GETMIN              0x0016
 116 #define VLC_VAR_GETMAX              0x0017
 117 #define VLC_VAR_GETSTEP             0x0018
 118
 119 #define VLC_VAR_ADDCHOICE           0x0020
 120 #define VLC_VAR_DELCHOICE           0x0021
 121 #define VLC_VAR_CLEARCHOICES        0x0022
 122 #define VLC_VAR_SETDEFAULT          0x0023
 123 #define VLC_VAR_GETCHOICES          0x0024
 124 #define VLC_VAR_GETLIST             0x0025
 125 #define VLC_VAR_CHOICESCOUNT        0x0026
 126
 127 #define VLC_VAR_SETISCOMMAND        0x0040
 128 /**@}*/
 129
 130 /** \defgroup var_GetAndSet Variable actions
 131  * These are the different actions that can be used with var_GetAndSet()
 132  * @{
 133  */
 134 enum {
 135     VLC_VAR_BOOL_TOGGLE, /**< Invert a boolean value (param ignored) */
 136     VLC_VAR_INTEGER_ADD, /**< Add parameter to an integer value */
 137     VLC_VAR_INTEGER_OR,  /**< Binary OR over an integer bits field */
 138     VLC_VAR_INTEGER_NAND,/**< Binary NAND over an integer bits field */
 139 };
 140 /**@}*/
 141
 142 /*****************************************************************************
 143  * Prototypes
 144  *****************************************************************************/
 145 VLC_API int var_Create( vlc_object_t *, const char *, int );
 146 #define var_Create(a,b,c) var_Create( VLC_OBJECT(a), b, c )
 147
 148 VLC_API int var_Destroy( vlc_object_t *, const char * );
 149 #define var_Destroy(a,b) var_Destroy( VLC_OBJECT(a), b )
 150
 151 VLC_API int var_Change( vlc_object_t *, const char *, int, vlc_value_t *, vlc_value_t * );
 152 #define var_Change(a,b,c,d,e) var_Change( VLC_OBJECT(a), b, c, d, e )
 153
 154 VLC_API int var_Type( vlc_object_t *, const char * ) VLC_USED;
 155 #define var_Type(a,b) var_Type( VLC_OBJECT(a), b )
 156
 157 VLC_API int var_Set( vlc_object_t *, const char *, vlc_value_t );
 158 #define var_Set(a,b,c) var_Set( VLC_OBJECT(a), b, c )
 159
 160 VLC_API int var_Get( vlc_object_t *, const char *, vlc_value_t * );
 161 #define var_Get(a,b,c) var_Get( VLC_OBJECT(a), b, c )
 162
 163 VLC_API int var_SetChecked( vlc_object_t *, const char *, int, vlc_value_t );
 164 #define var_SetChecked(o,n,t,v) var_SetChecked(VLC_OBJECT(o),n,t,v)
 165 VLC_API int var_GetChecked( vlc_object_t *, const char *, int, vlc_value_t * );
 166 #define var_GetChecked(o,n,t,v) var_GetChecked(VLC_OBJECT(o),n,t,v)
 167 VLC_API int var_GetAndSet( vlc_object_t *, const char *, int, vlc_value_t * );
 168
 169 VLC_API int var_Inherit( vlc_object_t *, const char *, int, vlc_value_t * );
 170
 171 VLC_API int var_Command( vlc_object_t *, const char *, const char *, const char *, char ** );
 172 #define var_Command(a,b,c,d,e) var_Command( VLC_OBJECT( a ), b, c, d, e )
 173
 174 VLC_API void var_FreeList( vlc_value_t *, vlc_value_t * );
 175
 176
 177 /*****************************************************************************
 178  * Variable callbacks
 179  *****************************************************************************
 180  * int MyCallback( vlc_object_t *p_this,
 181  *                 char const *psz_variable,
 182  *                 vlc_value_t oldvalue,
 183  *                 vlc_value_t newvalue,
 184  *                 void *p_data);
 185  *****************************************************************************/
 186 VLC_API int var_AddCallback( vlc_object_t *, const char *, vlc_callback_t, void * );
 187 VLC_API int var_DelCallback( vlc_object_t *, const char *, vlc_callback_t, void * );
 188 VLC_API int var_TriggerCallback( vlc_object_t *, const char * );
 189
 190 #define var_AddCallback(a,b,c,d) var_AddCallback( VLC_OBJECT(a), b, c, d )
 191 #define var_DelCallback(a,b,c,d) var_DelCallback( VLC_OBJECT(a), b, c, d )
 192 #define var_TriggerCallback(a,b) var_TriggerCallback( VLC_OBJECT(a), b )
 193
 194 /*****************************************************************************
 195  * helpers functions
 196  *****************************************************************************/
 197
 198 /**
 199  * Set the value of an integer variable
 200  *
 201  * \param p_obj The object that holds the variable
 202  * \param psz_name The name of the variable
 203  * \param i The new integer value of this variable
 204  */
 205 static inline int var_SetInteger( vlc_object_t *p_obj, const char *psz_name,
 206                                   int64_t i )
 207 {
 208     vlc_value_t val;
 209     val.i_int = i;
 210     return var_SetChecked( p_obj, psz_name, VLC_VAR_INTEGER, val );
 211 }
 212
 213 /**
 214  * Set the value of an boolean variable
 215  *
 216  * \param p_obj The object that holds the variable
 217  * \param psz_name The name of the variable
 218  * \param b The new boolean value of this variable
 219  */
 220 static inline int var_SetBool( vlc_object_t *p_obj, const char *psz_name, bool b )
 221 {
 222     vlc_value_t val;
 223     val.b_bool = b;
 224     return var_SetChecked( p_obj, psz_name, VLC_VAR_BOOL, val );
 225 }
 226
 227 /**
 228  * Set the value of a time variable
 229  *
 230  * \param p_obj The object that holds the variable
 231  * \param psz_name The name of the variable
 232  * \param i The new time value of this variable
 233  */
 234 static inline int var_SetTime( vlc_object_t *p_obj, const char *psz_name, int64_t i )
 235 {
 236     vlc_value_t val;
 237     val.i_time = i;
 238     return var_SetChecked( p_obj, psz_name, VLC_VAR_TIME, val );
 239 }
 240
 241 static inline int var_SetCoords( vlc_object_t *obj, const char *name,
 242                                  int32_t x, int32_t y )
 243 {
 244     vlc_value_t val;
 245     val.coords.x = x;
 246     val.coords.y = y;
 247     return var_SetChecked (obj, name, VLC_VAR_COORDS, val);
 248 }
 249 #define var_SetCoords(o,n,x,y) var_SetCoords(VLC_OBJECT(o),n,x,y)
 250
 251 /**
 252  * Set the value of a float variable
 253  *
 254  * \param p_obj The object that holds the variable
 255  * \param psz_name The name of the variable
 256  * \param f The new float value of this variable
 257  */
 258 static inline int var_SetFloat( vlc_object_t *p_obj, const char *psz_name, float f )
 259 {
 260     vlc_value_t val;
 261     val.f_float = f;
 262     return var_SetChecked( p_obj, psz_name, VLC_VAR_FLOAT, val );
 263 }
 264
 265 /**
 266  * Set the value of a string variable
 267  *
 268  * \param p_obj The object that holds the variable
 269  * \param psz_name The name of the variable
 270  * \param psz_string The new string value of this variable
 271  */
 272 static inline int var_SetString( vlc_object_t *p_obj, const char *psz_name, const char *psz_string )
 273 {
 274     vlc_value_t val;
 275     val.psz_string = (char *)psz_string;
 276     return var_SetChecked( p_obj, psz_name, VLC_VAR_STRING, val );
 277 }
 278
 279 /**
 280  * Set the value of a pointer variable
 281  *
 282  * \param p_obj The object that holds the variable
 283  * \param psz_name The name of the variable
 284  * \param ptr The new pointer value of this variable
 285  */
 286 static inline
 287 int var_SetAddress( vlc_object_t *p_obj, const char *psz_name, void *ptr )
 288 {
 289     vlc_value_t val;
 290     val.p_address = ptr;
 291     return var_SetChecked( p_obj, psz_name, VLC_VAR_ADDRESS, val );
 292 }
 293
 294 #define var_SetInteger(a,b,c)   var_SetInteger( VLC_OBJECT(a),b,c)
 295 #define var_SetBool(a,b,c)      var_SetBool( VLC_OBJECT(a),b,c)
 296 #define var_SetTime(a,b,c)      var_SetTime( VLC_OBJECT(a),b,c)
 297 #define var_SetFloat(a,b,c)     var_SetFloat( VLC_OBJECT(a),b,c)
 298 #define var_SetString(a,b,c)    var_SetString( VLC_OBJECT(a),b,c)
 299 #define var_SetAddress(o, n, p) var_SetAddress(VLC_OBJECT(o), n, p)
 300
 301
 302 /**
 303  * Get an integer value
 304 *
 305  * \param p_obj The object that holds the variable
 306  * \param psz_name The name of the variable
 307  */
 308 VLC_USED
 309 static inline int64_t var_GetInteger( vlc_object_t *p_obj, const char *psz_name )
 310 {
 311     vlc_value_t val;
 312     if( !var_GetChecked( p_obj, psz_name, VLC_VAR_INTEGER, &val ) )
 313         return val.i_int;
 314     else
 315         return 0;
 316 }
 317
 318 /**
 319  * Get a boolean value
 320  *
 321  * \param p_obj The object that holds the variable
 322  * \param psz_name The name of the variable
 323  */
 324 VLC_USED
 325 static inline bool var_GetBool( vlc_object_t *p_obj, const char *psz_name )
 326 {
 327     vlc_value_t val; val.b_bool = false;
 328
 329     if( !var_GetChecked( p_obj, psz_name, VLC_VAR_BOOL, &val ) )
 330         return val.b_bool;
 331     else
 332         return false;
 333 }
 334
 335 /**
 336  * Get a time value
 337  *
 338  * \param p_obj The object that holds the variable
 339  * \param psz_name The name of the variable
 340  */
 341 VLC_USED
 342 static inline int64_t var_GetTime( vlc_object_t *p_obj, const char *psz_name )
 343 {
 344     vlc_value_t val; val.i_time = 0L;
 345     if( !var_GetChecked( p_obj, psz_name, VLC_VAR_TIME, &val ) )
 346         return val.i_time;
 347     else
 348         return 0;
 349 }
 350
 351 static inline void var_GetCoords( vlc_object_t *obj, const char *name,
 352                                   int32_t *px, int32_t *py )
 353 {
 354     vlc_value_t val;
 355
 356     if (likely(!var_GetChecked (obj, name, VLC_VAR_COORDS, &val)))
 357     {
 358         *px = val.coords.x;
 359         *py = val.coords.y;
 360     }
 361     else
 362         *px = *py = 0;
 363 }
 364 #define var_GetCoords(o,n,x,y) var_GetCoords(VLC_OBJECT(o),n,x,y)
 365
 366 /**
 367  * Get a float value
 368  *
 369  * \param p_obj The object that holds the variable
 370  * \param psz_name The name of the variable
 371  */
 372 VLC_USED
 373 static inline float var_GetFloat( vlc_object_t *p_obj, const char *psz_name )
 374 {
 375     vlc_value_t val; val.f_float = 0.0;
 376     if( !var_GetChecked( p_obj, psz_name, VLC_VAR_FLOAT, &val ) )
 377         return val.f_float;
 378     else
 379         return 0.0;
 380 }
 381
 382 /**
 383  * Get a string value
 384  *
 385  * \param p_obj The object that holds the variable
 386  * \param psz_name The name of the variable
 387  */
 388 VLC_USED VLC_MALLOC
 389 static inline char *var_GetString( vlc_object_t *p_obj, const char *psz_name )
 390 {
 391     vlc_value_t val; val.psz_string = NULL;
 392     if( var_GetChecked( p_obj, psz_name, VLC_VAR_STRING, &val ) )
 393         return NULL;
 394     else
 395         return val.psz_string;
 396 }
 397
 398 VLC_USED VLC_MALLOC
 399 static inline char *var_GetNonEmptyString( vlc_object_t *p_obj, const char *psz_name )
 400 {
 401     vlc_value_t val;
 402     if( var_GetChecked( p_obj, psz_name, VLC_VAR_STRING, &val ) )
 403         return NULL;
 404     if( val.psz_string && *val.psz_string )
 405         return val.psz_string;
 406     free( val.psz_string );
 407     return NULL;
 408 }
 409
 410 VLC_USED
 411 static inline void *var_GetAddress( vlc_object_t *p_obj, const char *psz_name )
 412 {
 413     vlc_value_t val;
 414     if( var_GetChecked( p_obj, psz_name, VLC_VAR_ADDRESS, &val ) )
 415         return NULL;
 416     else
 417         return val.p_address;
 418 }
 419
 420 /**
 421  * Increment an integer variable
 422  * \param p_obj the object that holds the variable
 423  * \param psz_name the name of the variable
 424  */
 425 static inline int64_t var_IncInteger( vlc_object_t *p_obj, const char *psz_name )
 426 {
 427     vlc_value_t val;
 428     val.i_int = 1;
 429     var_GetAndSet( p_obj, psz_name, VLC_VAR_INTEGER_ADD, &val );
 430     return val.i_int;
 431 }
 432 #define var_IncInteger(a,b) var_IncInteger( VLC_OBJECT(a), b )
 433
 434 /**
 435  * Decrement an integer variable
 436  * \param p_obj the object that holds the variable
 437  * \param psz_name the name of the variable
 438  */
 439 static inline int64_t var_DecInteger( vlc_object_t *p_obj, const char *psz_name )
 440 {
 441     vlc_value_t val;
 442     val.i_int = -1;
 443     var_GetAndSet( p_obj, psz_name, VLC_VAR_INTEGER_ADD, &val );
 444     return val.i_int;
 445 }
 446 #define var_DecInteger(a,b) var_DecInteger( VLC_OBJECT(a), b )
 447
 448 static inline uint64_t var_OrInteger( vlc_object_t *obj, const char *name,
 449                                       unsigned v )
 450 {
 451     vlc_value_t val;
 452     val.i_int = v;
 453     var_GetAndSet( obj, name, VLC_VAR_INTEGER_OR, &val );
 454     return val.i_int;
 455 }
 456 #define var_OrInteger(a,b,c) var_OrInteger(VLC_OBJECT(a),b,c)
 457
 458 static inline uint64_t var_NAndInteger( vlc_object_t *obj, const char *name,
 459                                         unsigned v )
 460 {
 461     vlc_value_t val;
 462     val.i_int = v;
 463     var_GetAndSet( obj, name, VLC_VAR_INTEGER_NAND, &val );
 464     return val.i_int;
 465 }
 466 #define var_NAndInteger(a,b,c) var_NAndInteger(VLC_OBJECT(a),b,c)
 467
 468 /**
 469  * Create a integer variable with inherit and get its value.
 470  *
 471  * \param p_obj The object that holds the variable
 472  * \param psz_name The name of the variable
 473  */
 474 VLC_USED
 475 static inline int64_t var_CreateGetInteger( vlc_object_t *p_obj, const char *psz_name )
 476 {
 477     var_Create( p_obj, psz_name, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT );
 478     return var_GetInteger( p_obj, psz_name );
 479 }
 480
 481 /**
 482  * Create a boolean variable with inherit and get its value.
 483  *
 484  * \param p_obj The object that holds the variable
 485  * \param psz_name The name of the variable
 486  */
 487 VLC_USED
 488 static inline bool var_CreateGetBool( vlc_object_t *p_obj, const char *psz_name )
 489 {
 490     var_Create( p_obj, psz_name, VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
 491     return var_GetBool( p_obj, psz_name );
 492 }
 493
 494 /**
 495  * Create a time variable with inherit and get its value.
 496  *
 497  * \param p_obj The object that holds the variable
 498  * \param psz_name The name of the variable
 499  */
 500 VLC_USED
 501 static inline int64_t var_CreateGetTime( vlc_object_t *p_obj, const char *psz_name )
 502 {
 503     var_Create( p_obj, psz_name, VLC_VAR_TIME | VLC_VAR_DOINHERIT );
 504     return var_GetTime( p_obj, psz_name );
 505 }
 506
 507 /**
 508  * Create a float variable with inherit and get its value.
 509  *
 510  * \param p_obj The object that holds the variable
 511  * \param psz_name The name of the variable
 512  */
 513 VLC_USED
 514 static inline float var_CreateGetFloat( vlc_object_t *p_obj, const char *psz_name )
 515 {
 516     var_Create( p_obj, psz_name, VLC_VAR_FLOAT | VLC_VAR_DOINHERIT );
 517     return var_GetFloat( p_obj, psz_name );
 518 }
 519
 520 /**
 521  * Create a string variable with inherit and get its value.
 522  *
 523  * \param p_obj The object that holds the variable
 524  * \param psz_name The name of the variable
 525  */
 526 VLC_USED VLC_MALLOC
 527 static inline char *var_CreateGetString( vlc_object_t *p_obj,
 528                                            const char *psz_name )
 529 {
 530     var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 531     return var_GetString( p_obj, psz_name );
 532 }
 533
 534 VLC_USED VLC_MALLOC
 535 static inline char *var_CreateGetNonEmptyString( vlc_object_t *p_obj,
 536                                                    const char *psz_name )
 537 {
 538     var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT );
 539     return var_GetNonEmptyString( p_obj, psz_name );
 540 }
 541
 542 /**
 543  * Create an address variable with inherit and get its value.
 544  *
 545  * \param p_obj The object that holds the variable
 546  * \param psz_name The name of the variable
 547  */
 548 VLC_USED
 549 static inline void *var_CreateGetAddress( vlc_object_t *p_obj,
 550                                            const char *psz_name )
 551 {
 552     var_Create( p_obj, psz_name, VLC_VAR_ADDRESS | VLC_VAR_DOINHERIT );
 553     return var_GetAddress( p_obj, psz_name );
 554 }
 555
 556 #define var_CreateGetInteger(a,b)   var_CreateGetInteger( VLC_OBJECT(a),b)
 557 #define var_CreateGetBool(a,b)   var_CreateGetBool( VLC_OBJECT(a),b)
 558 #define var_CreateGetTime(a,b)   var_CreateGetTime( VLC_OBJECT(a),b)
 559 #define var_CreateGetFloat(a,b)   var_CreateGetFloat( VLC_OBJECT(a),b)
 560 #define var_CreateGetString(a,b)   var_CreateGetString( VLC_OBJECT(a),b)
 561 #define var_CreateGetNonEmptyString(a,b)   var_CreateGetNonEmptyString( VLC_OBJECT(a),b)
 562 #define var_CreateGetAddress(a,b)  var_CreateGetAddress( VLC_OBJECT(a),b)
 563
 564 /**
 565  * Create a integer command variable with inherit and get its value.
 566  *
 567  * \param p_obj The object that holds the variable
 568  * \param psz_name The name of the variable
 569  */
 570 VLC_USED
 571 static inline int64_t var_CreateGetIntegerCommand( vlc_object_t *p_obj, const char *psz_name )
 572 {
 573     var_Create( p_obj, psz_name, VLC_VAR_INTEGER | VLC_VAR_DOINHERIT
 574                                    | VLC_VAR_ISCOMMAND );
 575     return var_GetInteger( p_obj, psz_name );
 576 }
 577
 578 /**
 579  * Create a boolean command variable with inherit and get its value.
 580  *
 581  * \param p_obj The object that holds the variable
 582  * \param psz_name The name of the variable
 583  */
 584 VLC_USED
 585 static inline bool var_CreateGetBoolCommand( vlc_object_t *p_obj, const char *psz_name )
 586 {
 587     var_Create( p_obj, psz_name, VLC_VAR_BOOL | VLC_VAR_DOINHERIT
 588                                    | VLC_VAR_ISCOMMAND );
 589     return var_GetBool( p_obj, psz_name );
 590 }
 591
 592 /**
 593  * Create a time command variable with inherit and get its value.
 594  *
 595  * \param p_obj The object that holds the variable
 596  * \param psz_name The name of the variable
 597  */
 598 VLC_USED
 599 static inline int64_t var_CreateGetTimeCommand( vlc_object_t *p_obj, const char *psz_name )
 600 {
 601     var_Create( p_obj, psz_name, VLC_VAR_TIME | VLC_VAR_DOINHERIT
 602                                    | VLC_VAR_ISCOMMAND );
 603     return var_GetTime( p_obj, psz_name );
 604 }
 605
 606 /**
 607  * Create a float command variable with inherit and get its value.
 608  *
 609  * \param p_obj The object that holds the variable
 610  * \param psz_name The name of the variable
 611  */
 612 VLC_USED
 613 static inline float var_CreateGetFloatCommand( vlc_object_t *p_obj, const char *psz_name )
 614 {
 615     var_Create( p_obj, psz_name, VLC_VAR_FLOAT | VLC_VAR_DOINHERIT
 616                                    | VLC_VAR_ISCOMMAND );
 617     return var_GetFloat( p_obj, psz_name );
 618 }
 619
 620 /**
 621  * Create a string command variable with inherit and get its value.
 622  *
 623  * \param p_obj The object that holds the variable
 624  * \param psz_name The name of the variable
 625  */
 626 VLC_USED VLC_MALLOC
 627 static inline char *var_CreateGetStringCommand( vlc_object_t *p_obj,
 628                                            const char *psz_name )
 629 {
 630     var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT
 631                                    | VLC_VAR_ISCOMMAND );
 632     return var_GetString( p_obj, psz_name );
 633 }
 634
 635 VLC_USED VLC_MALLOC
 636 static inline char *var_CreateGetNonEmptyStringCommand( vlc_object_t *p_obj,
 637                                                    const char *psz_name )
 638 {
 639     var_Create( p_obj, psz_name, VLC_VAR_STRING | VLC_VAR_DOINHERIT
 640                                    | VLC_VAR_ISCOMMAND );
 641     return var_GetNonEmptyString( p_obj, psz_name );
 642 }
 643
 644 #define var_CreateGetIntegerCommand(a,b)   var_CreateGetIntegerCommand( VLC_OBJECT(a),b)
 645 #define var_CreateGetBoolCommand(a,b)   var_CreateGetBoolCommand( VLC_OBJECT(a),b)
 646 #define var_CreateGetTimeCommand(a,b)   var_CreateGetTimeCommand( VLC_OBJECT(a),b)
 647 #define var_CreateGetFloatCommand(a,b)   var_CreateGetFloatCommand( VLC_OBJECT(a),b)
 648 #define var_CreateGetStringCommand(a,b)   var_CreateGetStringCommand( VLC_OBJECT(a),b)
 649 #define var_CreateGetNonEmptyStringCommand(a,b)   var_CreateGetNonEmptyStringCommand( VLC_OBJECT(a),b)
 650
 651 VLC_USED
 652 static inline int var_CountChoices( vlc_object_t *p_obj, const char *psz_name )
 653 {
 654     vlc_value_t count;
 655     if( var_Change( p_obj, psz_name, VLC_VAR_CHOICESCOUNT, &count, NULL ) )
 656         return 0;
 657     return count.i_int;
 658 }
 659 #define var_CountChoices(a,b) var_CountChoices( VLC_OBJECT(a),b)
 660
 661
 662 static inline bool var_ToggleBool( vlc_object_t *p_obj, const char *psz_name )
 663 {
 664     vlc_value_t val;
 665     var_GetAndSet( p_obj, psz_name, VLC_VAR_BOOL_TOGGLE, &val );
 666     return val.b_bool;
 667 }
 668 #define var_ToggleBool(a,b) var_ToggleBool( VLC_OBJECT(a),b )
 669
 670
 671 VLC_USED
 672 static inline bool var_InheritBool( vlc_object_t *obj, const char *name )
 673 {
 674     vlc_value_t val;
 675
 676     if( var_Inherit( obj, name, VLC_VAR_BOOL, &val ) )
 677         val.b_bool = false;
 678     return val.b_bool;
 679 }
 680 #define var_InheritBool(o, n) var_InheritBool(VLC_OBJECT(o), n)
 681
 682 VLC_USED
 683 static inline int64_t var_InheritInteger( vlc_object_t *obj, const char *name )
 684 {
 685     vlc_value_t val;
 686
 687     if( var_Inherit( obj, name, VLC_VAR_INTEGER, &val ) )
 688         val.i_int = 0;
 689     return val.i_int;
 690 }
 691 #define var_InheritInteger(o, n) var_InheritInteger(VLC_OBJECT(o), n)
 692
 693 VLC_USED
 694 static inline float var_InheritFloat( vlc_object_t *obj, const char *name )
 695 {
 696     vlc_value_t val;
 697
 698     if( var_Inherit( obj, name, VLC_VAR_FLOAT, &val ) )
 699         val.f_float = 0.;
 700     return val.f_float;
 701 }
 702 #define var_InheritFloat(o, n) var_InheritFloat(VLC_OBJECT(o), n)
 703
 704 VLC_USED VLC_MALLOC
 705 static inline char *var_InheritString( vlc_object_t *obj, const char *name )
 706 {
 707     vlc_value_t val;
 708
 709     if( var_Inherit( obj, name, VLC_VAR_STRING, &val ) )
 710         val.psz_string = NULL;
 711     else if( val.psz_string && !*val.psz_string )
 712     {
 713         free( val.psz_string );
 714         val.psz_string = NULL;
 715     }
 716     return val.psz_string;
 717 }
 718 #define var_InheritString(o, n) var_InheritString(VLC_OBJECT(o), n)
 719
 720 VLC_USED
 721 static inline mtime_t var_InheritTime( vlc_object_t *obj, const char *name )
 722 {
 723     vlc_value_t val;
 724
 725     if( var_Inherit( obj, name, VLC_VAR_TIME, &val ) )
 726         val.i_time = 0;
 727     return val.i_time;
 728 }
 729 #define var_InheritTime(o, n) var_InheritTime(VLC_OBJECT(o), n)
 730
 731 VLC_USED
 732 static inline void *var_InheritAddress( vlc_object_t *obj, const char *name )
 733 {
 734     vlc_value_t val;
 735
 736     if( var_Inherit( obj, name, VLC_VAR_ADDRESS, &val ) )
 737         val.p_address = NULL;
 738     return val.p_address;
 739 }
 740 #define var_InheritAddress(o, n) var_InheritAddress(VLC_OBJECT(o), n)
 741
 742 VLC_API int var_InheritURational( vlc_object_t *, unsigned *num, unsigned *den, const char *var );
 743 #define var_InheritURational(a,b,c,d) var_InheritURational(VLC_OBJECT(a), b, c, d)
 744
 745 #define var_GetInteger(a,b)   var_GetInteger( VLC_OBJECT(a),b)
 746 #define var_GetBool(a,b)   var_GetBool( VLC_OBJECT(a),b)
 747 #define var_GetTime(a,b)   var_GetTime( VLC_OBJECT(a),b)
 748 #define var_GetFloat(a,b)   var_GetFloat( VLC_OBJECT(a),b)
 749 #define var_GetString(a,b)   var_GetString( VLC_OBJECT(a),b)
 750 #define var_GetNonEmptyString(a,b)   var_GetNonEmptyString( VLC_OBJECT(a),b)
 751 #define var_GetAddress(a,b)  var_GetAddress( VLC_OBJECT(a),b)
 752
 753 VLC_API int var_LocationParse(vlc_object_t *, const char *mrl, const char *prefix);
 754 #define var_LocationParse(o, m, p) var_LocationParse(VLC_OBJECT(o), m, p)
 755
 756 /**
 757  * @}
 758  */
 759 #endif /*  _VLC_VARIABLES_H */