git.sesse.net Git - vlc/blob - include/vlc_common.h

   1 /*****************************************************************************
   2  * common.h: common definitions
   3  * Collection of useful common types and macros definitions
   4  *****************************************************************************
   5  * Copyright (C) 1998, 1999, 2000 VideoLAN
   6  * $Id: vlc_common.h,v 1.87 2003/11/21 00:38:01 gbazin Exp $
   7  *
   8  * Authors: Samuel Hocevar <sam@via.ecp.fr>
   9  *          Vincent Seguin <seguin@via.ecp.fr>
  10  *          Gildas Bazin <gbazin@netcourrier.com>
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; either version 2 of the License, or
  15  * (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  25  *****************************************************************************/
  26
  27 /**
  28  * \file
  29  * This file is a collection of common definitions and types
  30  */
  31
  32 /*****************************************************************************
  33  * Required vlc headers
  34  *****************************************************************************/
  35 #if defined( __BORLANDC__ )
  36 #   undef PACKAGE
  37 #endif
  38
  39 #include "config.h"
  40
  41 #if defined( __BORLANDC__ )
  42 #   undef HAVE_VARIADIC_MACROS
  43 #   undef HAVE_STDINT_H
  44 #   undef HAVE_INTTYPES_H
  45 #   undef off_t
  46 #endif
  47
  48 #include "vlc_config.h"
  49 #include "modules_inner.h"
  50
  51 /*****************************************************************************
  52  * Required system headers
  53  *****************************************************************************/
  54 #include <stdlib.h>
  55 #include <stdarg.h>
  56
  57 #ifdef HAVE_STRING_H
  58 #   include <string.h>                                         /* strerror() */
  59 #endif
  60
  61 #ifdef HAVE_SYS_TYPES_H
  62 #   include <sys/types.h>
  63 #endif
  64
  65 /*****************************************************************************
  66  * Basic types definitions
  67  *****************************************************************************/
  68 #if defined( HAVE_STDINT_H )
  69 #   include <stdint.h>
  70 #elif defined( HAVE_INTTYPES_H )
  71 #   include <inttypes.h>
  72 #elif defined( SYS_CYGWIN )
  73 #   include <sys/types.h>
  74     /* Cygwin only defines half of these... */
  75     typedef u_int8_t            uint8_t;
  76     typedef u_int16_t           uint16_t;
  77     typedef u_int32_t           uint32_t;
  78     typedef u_int64_t           uint64_t;
  79 #else
  80     /* Fallback types (very x86-centric, sorry) */
  81     typedef unsigned char       uint8_t;
  82     typedef signed char         int8_t;
  83     typedef unsigned short      uint16_t;
  84     typedef signed short        int16_t;
  85     typedef unsigned int        uint32_t;
  86     typedef signed int          int32_t;
  87 #   if defined( _MSC_VER ) \
  88       || defined( UNDER_CE ) \
  89       || ( defined( WIN32 ) && !defined( __MINGW32__ ) )
  90     typedef unsigned __int64    uint64_t;
  91     typedef signed __int64      int64_t;
  92 #   else
  93     typedef unsigned long long  uint64_t;
  94     typedef signed long long    int64_t;
  95 #   endif
  96 #endif
  97
  98 typedef uint8_t                 byte_t;
  99
 100 /* ptrdiff_t definition */
 101 #ifdef HAVE_STDDEF_H
 102 #   include <stddef.h>
 103 #else
 104 #   include <malloc.h>
 105 #   ifndef _PTRDIFF_T
 106 #       define _PTRDIFF_T
 107 /* Not portable in a 64-bit environment. */
 108 typedef int                 ptrdiff_t;
 109 #   endif
 110 #endif
 111
 112 #if defined( WIN32 )
 113 #   include <malloc.h>
 114 #define PATH_MAX MAX_PATH
 115 #endif
 116
 117 #if (defined( WIN32 ) || defined( UNDER_CE )) && !defined( _SSIZE_T_ )
 118 typedef int                 ssize_t;
 119 #endif
 120
 121 /* Counter for statistics and profiling */
 122 typedef unsigned long       count_t;
 123
 124 /* DCT elements types */
 125 typedef int16_t             dctelem_t;
 126
 127 /* Video buffer types */
 128 typedef uint8_t             yuv_data_t;
 129
 130 /* Audio volume */
 131 typedef uint16_t            audio_volume_t;
 132
 133 #ifndef HAVE_SOCKLEN_T
 134 typedef int                 socklen_t;
 135 #endif
 136
 137 /*****************************************************************************
 138  * mtime_t: high precision date or time interval
 139  *****************************************************************************
 140  * Store a high precision date or time interval. The maximum precision is the
 141  * microsecond, and a 64 bits integer is used to avoid overflows (maximum
 142  * time interval is then 292271 years, which should be long enough for any
 143  * video). Dates are stored as microseconds since a common date (usually the
 144  * epoch). Note that date and time intervals can be manipulated using regular
 145  * arithmetic operators, and that no special functions are required.
 146  *****************************************************************************/
 147 typedef int64_t mtime_t;
 148
 149 /*****************************************************************************
 150  * The vlc_fourcc_t type.
 151  *****************************************************************************
 152  * See http://www.webartz.com/fourcc/ for a very detailed list.
 153  *****************************************************************************/
 154 typedef uint32_t vlc_fourcc_t;
 155
 156 #ifdef WORDS_BIGENDIAN
 157 #   define VLC_FOURCC( a, b, c, d ) \
 158         ( ((uint32_t)d) | ( ((uint32_t)c) << 8 ) \
 159            | ( ((uint32_t)b) << 16 ) | ( ((uint32_t)a) << 24 ) )
 160 #   define VLC_TWOCC( a, b ) \
 161         ( (uint16_t)(b) | ( (uint16_t)(a) << 8 ) )
 162
 163 #else
 164 #   define VLC_FOURCC( a, b, c, d ) \
 165         ( ((uint32_t)a) | ( ((uint32_t)b) << 8 ) \
 166            | ( ((uint32_t)c) << 16 ) | ( ((uint32_t)d) << 24 ) )
 167 #   define VLC_TWOCC( a, b ) \
 168         ( (uint16_t)(a) | ( (uint16_t)(b) << 8 ) )
 169
 170 #endif
 171
 172 /*****************************************************************************
 173  * Classes declaration
 174  *****************************************************************************/
 175
 176 /* Internal types */
 177 typedef struct libvlc_t libvlc_t;
 178 typedef struct vlc_t vlc_t;
 179 typedef struct variable_t variable_t;
 180
 181 /* Messages */
 182 typedef struct msg_bank_t msg_bank_t;
 183 typedef struct msg_subscription_t msg_subscription_t;
 184
 185 /* Playlist */
 186 typedef struct playlist_t playlist_t;
 187 typedef struct playlist_item_t playlist_item_t;
 188 typedef struct playlist_group_t playlist_group_t;
 189
 190 /* Modules */
 191 typedef struct module_bank_t module_bank_t;
 192 typedef struct module_t module_t;
 193 typedef struct module_config_t module_config_t;
 194 typedef struct module_symbols_t module_symbols_t;
 195
 196 /* Interface */
 197 typedef struct intf_thread_t intf_thread_t;
 198 typedef struct intf_sys_t intf_sys_t;
 199 typedef struct intf_console_t intf_console_t;
 200 typedef struct intf_msg_t intf_msg_t;
 201 typedef struct intf_channel_t intf_channel_t;
 202
 203 /* Input */
 204 typedef struct input_thread_t input_thread_t;
 205 typedef struct input_thread_sys_t input_thread_sys_t;
 206 typedef struct input_area_t input_area_t;
 207 typedef struct input_buffers_t input_buffers_t;
 208 typedef struct input_socket_t input_socket_t;
 209 typedef struct input_info_t input_info_t;
 210 typedef struct input_info_category_t input_info_category_t;
 211 typedef struct access_sys_t access_sys_t;
 212 typedef struct demux_sys_t demux_sys_t;
 213 typedef struct es_descriptor_t es_descriptor_t;
 214 typedef struct es_sys_t es_sys_t;
 215 typedef struct pgrm_descriptor_t pgrm_descriptor_t;
 216 typedef struct pgrm_sys_t pgrm_sys_t;
 217 typedef struct stream_descriptor_t stream_descriptor_t;
 218 typedef struct stream_sys_t stream_sys_t;
 219
 220 /* NInput */
 221 typedef struct stream_t stream_t;
 222 typedef struct es_out_t     es_out_t;
 223 typedef struct es_out_id_t  es_out_id_t;
 224 typedef struct es_out_sys_t es_out_sys_t;
 225
 226
 227 /* Audio */
 228 typedef struct aout_instance_t aout_instance_t;
 229 typedef struct aout_sys_t aout_sys_t;
 230 typedef struct aout_fifo_t aout_fifo_t;
 231 typedef struct aout_input_t aout_input_t;
 232 typedef struct aout_buffer_t aout_buffer_t;
 233 typedef struct audio_format_t audio_format_t;
 234 typedef audio_format_t audio_sample_format_t;
 235 typedef struct audio_date_t audio_date_t;
 236 typedef struct aout_filter_t aout_filter_t;
 237
 238 /* Video */
 239 typedef struct vout_thread_t vout_thread_t;
 240 typedef struct vout_sys_t vout_sys_t;
 241 typedef struct chroma_sys_t chroma_sys_t;
 242 typedef struct video_format_t video_format_t;
 243 typedef video_format_t video_frame_format_t;
 244 typedef struct picture_t picture_t;
 245 typedef struct picture_sys_t picture_sys_t;
 246 typedef struct picture_heap_t picture_heap_t;
 247 typedef struct subpicture_t subpicture_t;
 248 typedef struct subpicture_sys_t subpicture_sys_t;
 249 typedef struct vout_synchro_t vout_synchro_t;
 250 typedef struct text_renderer_sys_t text_renderer_sys_t;
 251 typedef struct text_style_t text_style_t;
 252
 253 /* Stream output */
 254 typedef struct sout_instance_t sout_instance_t;
 255 typedef struct sout_fifo_t sout_fifo_t;
 256 typedef struct sout_input_t sout_input_t;
 257 typedef struct sout_packetizer_input_t sout_packetizer_input_t;
 258 typedef struct sout_buffer_t sout_buffer_t;
 259 typedef struct sout_access_out_t sout_access_out_t;
 260 typedef struct sout_mux_t sout_mux_t;
 261 typedef struct sout_stream_t    sout_stream_t;
 262 typedef struct sout_cfg_t       sout_cfg_t;
 263 typedef struct sout_format_t    sout_format_t;
 264 /*typedef struct sap_session_t    sap_session_t;
 265 typedef struct slp_session_t    slp_session_t;*/
 266
 267 /* Decoders */
 268 typedef struct decoder_fifo_t decoder_fifo_t;
 269 typedef struct decoder_t      decoder_t;
 270 typedef struct decoder_sys_t  decoder_sys_t;
 271
 272 /* Encoders */
 273 typedef struct encoder_t      encoder_t;
 274 typedef struct encoder_sys_t  encoder_sys_t;
 275
 276 /* Misc */
 277 typedef struct data_packet_t data_packet_t;
 278 typedef struct data_buffer_t data_buffer_t;
 279 typedef struct stream_position_t stream_position_t;
 280 typedef struct stream_ctrl_t stream_ctrl_t;
 281 typedef struct pes_packet_t pes_packet_t;
 282 typedef struct bit_stream_t bit_stream_t;
 283 typedef struct network_socket_t network_socket_t;
 284 typedef struct iso639_lang_t iso639_lang_t;
 285
 286 /* block */
 287 typedef struct block_t      block_t;
 288 typedef struct block_fifo_t block_fifo_t;
 289
 290 /*****************************************************************************
 291  * Variable callbacks
 292  *****************************************************************************/
 293 typedef int ( * vlc_callback_t ) ( vlc_object_t *,      /* variable's object */
 294                                    char const *,            /* variable name */
 295                                    vlc_value_t,                 /* old value */
 296                                    vlc_value_t,                 /* new value */
 297                                    void * );                /* callback data */
 298
 299 /*****************************************************************************
 300  * Plug-in stuff
 301  *****************************************************************************/
 302 #ifndef __PLUGIN__
 303 #   define VLC_EXPORT( type, name, args ) type name args
 304 #else
 305 #   define VLC_EXPORT( type, name, args ) struct _u_n_u_s_e_d_
 306     extern module_symbols_t* p_symbols;
 307 #endif
 308
 309 /*****************************************************************************
 310  * OS-specific headers and thread types
 311  *****************************************************************************/
 312 #if defined( WIN32 ) || defined( UNDER_CE )
 313 #   define WIN32_LEAN_AND_MEAN
 314 #   include <windows.h>
 315 #   define IS_WINNT ( GetVersion() < 0x80000000 )
 316 #endif
 317
 318 #include "vlc_threads.h"
 319
 320 /*****************************************************************************
 321  * Common structure members
 322  *****************************************************************************/
 323
 324 /* VLC_COMMON_MEMBERS : members common to all basic vlc objects */
 325 #define VLC_COMMON_MEMBERS                                                  \
 326 /** \name VLC_COMMON_MEMBERS                                                \
 327  * these members are common for all vlc objects                             \
 328  */                                                                         \
 329 /**@{*/                                                                     \
 330     int   i_object_id;                                                      \
 331     int   i_object_type;                                                    \
 332     char *psz_object_type;                                                  \
 333     char *psz_object_name;                                                  \
 334                                                                             \
 335     /* Thread properties, if any */                                         \
 336     vlc_bool_t   b_thread;                                                  \
 337     vlc_thread_t thread_id;                                                 \
 338                                                                             \
 339     /* Object access lock */                                                \
 340     vlc_mutex_t  object_lock;                                               \
 341     vlc_cond_t   object_wait;                                               \
 342                                                                             \
 343     /* Object properties */                                                 \
 344     volatile vlc_bool_t b_error;                  /**< set by the object */ \
 345     volatile vlc_bool_t b_die;                   /**< set by the outside */ \
 346     volatile vlc_bool_t b_dead;                   /**< set by the object */ \
 347     volatile vlc_bool_t b_attached;               /**< set by the object */ \
 348                                                                             \
 349     /* Object variables */                                                  \
 350     vlc_mutex_t     var_lock;                                               \
 351     int             i_vars;                                                 \
 352     variable_t *    p_vars;                                                 \
 353                                                                             \
 354     /* Stuff related to the libvlc structure */                             \
 355     libvlc_t *      p_libvlc;                      /**< root of all evil */ \
 356     vlc_t *         p_vlc;                   /**< (root of all evil) - 1 */ \
 357                                                                             \
 358     volatile int    i_refcount;                         /**< usage count */ \
 359     vlc_object_t *  p_parent;                            /**< our parent */ \
 360     vlc_object_t ** pp_children;                       /**< our children */ \
 361     volatile int    i_children;                                             \
 362                                                                             \
 363     /* Private data */                                                      \
 364     void *          p_private;                                              \
 365                                                                             \
 366     /** Just a reminder so that people don't cast garbage */                \
 367     int be_sure_to_add_VLC_COMMON_MEMBERS_to_struct;                        \
 368 /**@}*/                                                                     \
 369
 370 /* VLC_OBJECT: attempt at doing a clever cast */
 371 #define VLC_OBJECT( x ) \
 372     ((vlc_object_t *)(x))+0*(x)->be_sure_to_add_VLC_COMMON_MEMBERS_to_struct
 373
 374 /*****************************************************************************
 375  * Macros and inline functions
 376  *****************************************************************************/
 377 #ifdef NTOHL_IN_SYS_PARAM_H
 378 #   include <sys/param.h>
 379
 380 #elif !defined(WIN32) && !defined( UNDER_CE )
 381 #   include <netinet/in.h>
 382
 383 #endif /* NTOHL_IN_SYS_PARAM_H || WIN32 */
 384
 385 /* CEIL: division with round to nearest greater integer */
 386 #define CEIL(n, d)  ( ((n) / (d)) + ( ((n) % (d)) ? 1 : 0) )
 387
 388 /* PAD: PAD(n, d) = CEIL(n ,d) * d */
 389 #define PAD(n, d)   ( ((n) % (d)) ? ((((n) / (d)) + 1) * (d)) : (n) )
 390
 391 /* __MAX and __MIN: self explanatory */
 392 #ifndef __MAX
 393 #   define __MAX(a, b)   ( ((a) > (b)) ? (a) : (b) )
 394 #endif
 395 #ifndef __MIN
 396 #   define __MIN(a, b)   ( ((a) < (b)) ? (a) : (b) )
 397 #endif
 398
 399 /* Dynamic array handling: realloc array, move data, increment position */
 400 #define INSERT_ELEM( p_ar, i_oldsize, i_pos, elem )                           \
 401     do                                                                        \
 402     {                                                                         \
 403         if( i_oldsize )                                                       \
 404         {                                                                     \
 405             (p_ar) = realloc( p_ar, ((i_oldsize) + 1) * sizeof( *(p_ar) ) );  \
 406         }                                                                     \
 407         else                                                                  \
 408         {                                                                     \
 409             (p_ar) = malloc( ((i_oldsize) + 1) * sizeof( *(p_ar) ) );         \
 410         }                                                                     \
 411         if( (i_oldsize) - (i_pos) )                                           \
 412         {                                                                     \
 413             memmove( (p_ar) + (i_pos) + 1,                                    \
 414                      (p_ar) + (i_pos),                                        \
 415                      ((i_oldsize) - (i_pos)) * sizeof( *(p_ar) ) );           \
 416         }                                                                     \
 417         (p_ar)[i_pos] = elem;                                                 \
 418         (i_oldsize)++;                                                        \
 419     }                                                                         \
 420     while( 0 )
 421
 422 #define REMOVE_ELEM( p_ar, i_oldsize, i_pos )                                 \
 423     do                                                                        \
 424     {                                                                         \
 425         if( (i_oldsize) - (i_pos) - 1 )                                       \
 426         {                                                                     \
 427             memmove( (p_ar) + (i_pos),                                        \
 428                      (p_ar) + (i_pos) + 1,                                    \
 429                      ((i_oldsize) - (i_pos) - 1) * sizeof( *(p_ar) ) );       \
 430         }                                                                     \
 431         if( i_oldsize > 1 )                                                   \
 432         {                                                                     \
 433             (p_ar) = realloc( p_ar, ((i_oldsize) - 1) * sizeof( *(p_ar) ) );  \
 434         }                                                                     \
 435         else                                                                  \
 436         {                                                                     \
 437             free( p_ar );                                                     \
 438             (p_ar) = NULL;                                                    \
 439         }                                                                     \
 440         (i_oldsize)--;                                                        \
 441     }                                                                         \
 442     while( 0 )
 443
 444
 445 #define TAB_APPEND( count, tab, p )             \
 446     if( (count) > 0 )                           \
 447     {                                           \
 448         (tab) = realloc( (tab), sizeof( void ** ) * ( (count) + 1 ) ); \
 449     }                                           \
 450     else                                        \
 451     {                                           \
 452         (tab) = malloc( sizeof( void ** ) );    \
 453     }                                           \
 454     (void**)(tab)[(count)] = (void*)(p);        \
 455     (count)++
 456
 457 #define TAB_FIND( count, tab, p, index )        \
 458     {                                           \
 459         int _i_;                                \
 460         (index) = -1;                           \
 461         for( _i_ = 0; _i_ < (count); _i_++ )    \
 462         {                                       \
 463             if((void**)(tab)[_i_]==(void*)(p))  \
 464             {                                   \
 465                 (index) = _i_;                  \
 466                 break;                          \
 467             }                                   \
 468         }                                       \
 469     }
 470
 471 #define TAB_REMOVE( count, tab, p )             \
 472     {                                           \
 473         int _i_index_;                          \
 474         TAB_FIND( count, tab, p, _i_index_ );   \
 475         if( _i_index_ >= 0 )                    \
 476         {                                       \
 477             if( (count) > 1 )                     \
 478             {                                   \
 479                 memmove( ((void**)(tab) + _i_index_),    \
 480                          ((void**)(tab) + _i_index_+1),  \
 481                          ( (count) - _i_index_ - 1 ) * sizeof( void* ) );\
 482             }                                   \
 483             else                                \
 484             {                                   \
 485                 free( tab );                    \
 486                 (tab) = NULL;                   \
 487             }                                   \
 488             (count)--;                          \
 489         }                                       \
 490     }
 491
 492 /* MSB (big endian)/LSB (little endian) conversions - network order is always
 493  * MSB, and should be used for both network communications and files. Note that
 494  * byte orders other than little and big endians are not supported, but only
 495  * the VAX seems to have such exotic properties. */
 496 static inline uint16_t U16_AT( void * _p )
 497 {
 498     uint8_t * p = (uint8_t *)_p;
 499     return ( ((uint16_t)p[0] << 8) | p[1] );
 500 }
 501 static inline uint32_t U32_AT( void * _p )
 502 {
 503     uint8_t * p = (uint8_t *)_p;
 504     return ( ((uint32_t)p[0] << 24) | ((uint32_t)p[1] << 16)
 505               | ((uint32_t)p[2] << 8) | p[3] );
 506 }
 507 static inline uint64_t U64_AT( void * _p )
 508 {
 509     uint8_t * p = (uint8_t *)_p;
 510     return ( ((uint64_t)p[0] << 56) | ((uint64_t)p[1] << 48)
 511               | ((uint64_t)p[2] << 40) | ((uint64_t)p[3] << 32)
 512               | ((uint64_t)p[4] << 24) | ((uint64_t)p[5] << 16)
 513               | ((uint64_t)p[6] << 8) | p[7] );
 514 }
 515
 516 static inline uint16_t GetWLE( void * _p )
 517 {
 518     uint8_t * p = (uint8_t *)_p;
 519     return ( ((uint16_t)p[1] << 8) | p[0] );
 520 }
 521 static inline uint32_t GetDWLE( void * _p )
 522 {
 523     uint8_t * p = (uint8_t *)_p;
 524     return ( ((uint32_t)p[3] << 24) | ((uint32_t)p[2] << 16)
 525               | ((uint32_t)p[1] << 8) | p[0] );
 526 }
 527 static inline uint64_t GetQWLE( void * _p )
 528 {
 529     uint8_t * p = (uint8_t *)_p;
 530     return ( ((uint64_t)p[7] << 56) | ((uint64_t)p[6] << 48)
 531               | ((uint64_t)p[5] << 40) | ((uint64_t)p[4] << 32)
 532               | ((uint64_t)p[3] << 24) | ((uint64_t)p[2] << 16)
 533               | ((uint64_t)p[1] << 8) | p[0] );
 534 }
 535
 536 #define GetWBE( p )     U16_AT( p )
 537 #define GetDWBE( p )    U32_AT( p )
 538 #define GetQWBE( p )    U64_AT( p )
 539
 540
 541 #if WORDS_BIGENDIAN
 542 #   define hton16(i)   ( i )
 543 #   define hton32(i)   ( i )
 544 #   define hton64(i)   ( i )
 545 #   define ntoh16(i)   ( i )
 546 #   define ntoh32(i)   ( i )
 547 #   define ntoh64(i)   ( i )
 548 #else
 549 #   define hton16(i)   U16_AT(&i)
 550 #   define hton32(i)   U32_AT(&i)
 551 #   define hton64(i)   U64_AT(&i)
 552 #   define ntoh16(i)   U16_AT(&i)
 553 #   define ntoh32(i)   U32_AT(&i)
 554 #   define ntoh64(i)   U64_AT(&i)
 555 #endif
 556
 557 /* Format string sanity checks */
 558 #ifdef HAVE_ATTRIBUTE_FORMAT
 559 #   define ATTRIBUTE_FORMAT(x,y) __attribute__ ((format(printf,x,y)))
 560 #else
 561 #   define ATTRIBUTE_FORMAT(x,y)
 562 #endif
 563
 564 /* Alignment of critical static data structures */
 565 #ifdef ATTRIBUTE_ALIGNED_MAX
 566 #   define ATTR_ALIGN(align) __attribute__ ((__aligned__ ((ATTRIBUTE_ALIGNED_MAX < align) ? ATTRIBUTE_ALIGNED_MAX : align)))
 567 #else
 568 #   define ATTR_ALIGN(align)
 569 #endif
 570
 571 /* Alignment of critical dynamic data structure
 572  *
 573  * Not all platforms support memalign so we provide a vlc_memalign wrapper
 574  * void *vlc_memalign( size_t align, size_t size, void **pp_orig )
 575  * *pp_orig is the pointer that has to be freed afterwards.
 576  */
 577 #if 0
 578 #ifdef HAVE_POSIX_MEMALIGN
 579 #   define vlc_memalign(align,size,pp_orig) \
 580     ( !posix_memalign( pp_orig, align, size ) ? *(pp_orig) : NULL )
 581 #endif
 582 #endif
 583 #ifdef HAVE_MEMALIGN
 584     /* Some systems have memalign() but no declaration for it */
 585     void * memalign( size_t align, size_t size );
 586
 587 #   define vlc_memalign(pp_orig,align,size) \
 588     ( *(pp_orig) = memalign( align, size ) )
 589
 590 #else /* We don't have any choice but to align manually */
 591 #   define vlc_memalign(pp_orig,align,size) \
 592     (( *(pp_orig) = malloc( size + align - 1 )) \
 593         ? (void *)( (((unsigned long)*(pp_orig)) + (unsigned long)(align-1) ) \
 594                        & (~(unsigned long)(align-1)) ) \
 595         : NULL )
 596
 597 #endif
 598
 599 /* Stuff defined in src/extras/libc.c */
 600 #ifndef HAVE_STRDUP
 601 #   define strdup vlc_strdup
 602     VLC_EXPORT( char *, vlc_strdup, ( const char *s ) );
 603 #elif !defined(__PLUGIN__)
 604 #   define vlc_strdup NULL
 605 #endif
 606
 607 #ifndef HAVE_STRNDUP
 608 #   if defined(STRNDUP_IN_GNOME_H) && \
 609         (defined(MODULE_NAME_IS_gnome)||defined(MODULE_NAME_IS_gnome_main)||\
 610          defined(MODULE_NAME_IS_gnome2)||defined(MODULE_NAME_IS_gnome2_main))
 611         /* Do nothing: gnome.h defines strndup for us */
 612 #   else
 613 #       define strndup vlc_strndup
 614         VLC_EXPORT( char *, vlc_strndup, ( const char *s, size_t n ) );
 615 #   endif
 616 #elif !defined(__PLUGIN__)
 617 #   define vlc_strndup NULL
 618 #endif
 619
 620 #ifndef HAVE_ATOF
 621 #   define atof vlc_atof
 622     VLC_EXPORT( double, vlc_atof, ( const char *nptr ) );
 623 #elif !defined(__PLUGIN__)
 624 #   define vlc_atof NULL
 625 #endif
 626
 627 #ifndef HAVE_ATOLL
 628 #   define atoll vlc_atoll
 629     VLC_EXPORT( int64_t, vlc_atoll, ( const char *nptr ) );
 630 #elif !defined(__PLUGIN__)
 631 #   define vlc_atoll NULL
 632 #endif
 633
 634 #ifndef HAVE_GETENV
 635 #   define getenv vlc_getenv
 636     VLC_EXPORT( char *, vlc_getenv, ( const char *name ) );
 637 #elif !defined(__PLUGIN__)
 638 #   define vlc_getenv NULL
 639 #endif
 640
 641 #ifndef HAVE_STRCASECMP
 642 #   ifdef HAVE_STRICMP
 643 #       define strcasecmp stricmp
 644 #       if !defined(__PLUGIN__)
 645 #           define vlc_strcasecmp NULL
 646 #       endif
 647 #   elif !defined(__PLUGIN__)
 648 #       define strcasecmp vlc_strcasecmp
 649         VLC_EXPORT( int, vlc_strcasecmp, ( const char *s1, const char *s2 ) );
 650 #   endif
 651 #elif !defined(__PLUGIN__)
 652 #   define vlc_strcasecmp NULL
 653 #endif
 654
 655 #ifndef HAVE_STRNCASECMP
 656 #   ifdef HAVE_STRNICMP
 657 #       define strncasecmp strnicmp
 658 #       if !defined(__PLUGIN__)
 659 #           define vlc_strncasecmp NULL
 660 #       endif
 661 #   elif !defined(__PLUGIN__)
 662 #       define strncasecmp vlc_strncasecmp
 663         VLC_EXPORT( int, vlc_strncasecmp, ( const char *s1, const char *s2, size_t n ) );
 664 #   endif
 665 #elif !defined(__PLUGIN__)
 666 #   define vlc_strncasecmp NULL
 667 #endif
 668
 669 /* Format type specifiers for 64 bits numbers */
 670 #if !defined(WIN32) && !defined(UNDER_CE)
 671 #   define I64Fd "%lld"
 672 #   define I64Fi "%lli"
 673 #   define I64Fo "%llo"
 674 #   define I64Fu "%llu"
 675 #   define I64Fx "%llx"
 676 #   define I64FX "%llX"
 677 #else
 678 #   define I64Fd "%I64d"
 679 #   define I64Fi "%I64i"
 680 #   define I64Fo "%I64o"
 681 #   define I64Fu "%I64u"
 682 #   define I64Fx "%I64x"
 683 #   define I64FX "%I64X"
 684 #endif /* defined(WIN32)||defined(UNDER_CE) */
 685
 686 /* 64 bits integer constant suffix */
 687 #if defined( __MINGW32__ ) || (!defined(WIN32) && !defined(UNDER_CE))
 688 #   define I64C(x)         x##LL
 689 #else
 690 #   define I64C(x)         x##i64
 691 #endif /* defined(WIN32)||defined(UNDER_CE) */
 692
 693 #if defined(WIN32) || defined(UNDER_CE)
 694 /* win32, cl and icl support */
 695 #   if defined( _MSC_VER ) || !defined( __MINGW32__ )
 696 #       define __attribute__(x)
 697 #       define __inline__      __inline
 698 #       define S_IFBLK         0x3000  /* Block */
 699 #       define S_ISBLK(m)      (0)
 700 #       define S_ISCHR(m)      (0)
 701 #       define S_ISFIFO(m)     (((m)&_S_IFMT) == _S_IFIFO)
 702 #       define S_ISREG(m)      (((m)&_S_IFMT) == _S_IFREG)
 703 #   endif
 704
 705 /* several type definitions */
 706 #   if defined( __MINGW32__ )
 707 #       if !defined( _OFF_T_ )
 708 typedef long long _off_t;
 709 typedef _off_t off_t;
 710 #           define _OFF_T_
 711 #       else
 712 #           ifdef off_t
 713 #               undef off_t
 714 #           endif
 715 #           define off_t long long
 716 #       endif
 717 #   endif
 718
 719 #   if defined( _MSC_VER )
 720 #       if !defined( _OFF_T_DEFINED )
 721 typedef __int64 off_t;
 722 #           define _OFF_T_DEFINED
 723 #       else
 724 #           define off_t __int64
 725 #       endif
 726 #   endif
 727
 728 #   if defined( __BORLANDC__ )
 729 #       undef off_t
 730 #       define off_t unsigned __int64
 731 #   endif
 732
 733 #   ifndef O_NONBLOCK
 734 #       define O_NONBLOCK 0
 735 #   endif
 736
 737 #   ifndef alloca
 738 #       define alloca _alloca
 739 #   endif
 740
 741     /* These two are not defined in mingw32 (bug?) */
 742 #   ifndef snprintf
 743 #       define snprintf _snprintf
 744 #   endif
 745 #   ifndef vsnprintf
 746 #       define vsnprintf _vsnprintf
 747 #   endif
 748
 749 #endif
 750
 751 /* lseek (defined in src/extras/libc.c) */
 752 #ifndef HAVE_LSEEK
 753 #   define lseek vlc_lseek
 754     VLC_EXPORT( off_t, vlc_lseek, ( int fildes, off_t offset, int whence ) );
 755 #elif !defined(__PLUGIN__)
 756 #   define vlc_lseek NULL
 757 #endif
 758
 759 /* vlc_wraptext (defined in src/extras/libc.c) */
 760 #define wraptext vlc_wraptext
 761 VLC_EXPORT( char *, vlc_wraptext, ( const char *, int, vlc_bool_t ) );
 762
 763 /*****************************************************************************
 764  * CPU capabilities
 765  *****************************************************************************/
 766 #define CPU_CAPABILITY_NONE    0
 767 #define CPU_CAPABILITY_486     (1<<0)
 768 #define CPU_CAPABILITY_586     (1<<1)
 769 #define CPU_CAPABILITY_PPRO    (1<<2)
 770 #define CPU_CAPABILITY_MMX     (1<<3)
 771 #define CPU_CAPABILITY_3DNOW   (1<<4)
 772 #define CPU_CAPABILITY_MMXEXT  (1<<5)
 773 #define CPU_CAPABILITY_SSE     (1<<6)
 774 #define CPU_CAPABILITY_ALTIVEC (1<<16)
 775 #define CPU_CAPABILITY_FPU     (1<<31)
 776
 777 /*****************************************************************************
 778  * I18n stuff
 779  *****************************************************************************/
 780 VLC_EXPORT( char *, vlc_dgettext, ( const char *package, const char *msgid ) );
 781
 782 #if defined( ENABLE_NLS ) && \
 783      (defined(MODULE_NAME_IS_gnome)||defined(MODULE_NAME_IS_gnome_main)||\
 784       defined(MODULE_NAME_IS_gnome2)||defined(MODULE_NAME_IS_gnome2_main))
 785     /* Declare nothing: gnome.h will do it for us */
 786 #elif defined( ENABLE_NLS )
 787 #if defined( HAVE_INCLUDED_GETTEXT )
 788 #   include "libintl.h"
 789 #else
 790 #   include <libintl.h>
 791 #endif
 792 #   undef _
 793 #if defined( __BORLANDC__ )
 794 #define _(String) vlc_dgettext (PACKAGE_TARNAME, String)
 795 #else
 796 #   define _(String) vlc_dgettext (PACKAGE, String)
 797 #endif
 798 #   define N_(String) ((char*)(String))
 799 #else
 800 #   define _(String) ((char*)(String))
 801 #   define N_(String) ((char*)(String))
 802 #endif
 803
 804 /*****************************************************************************
 805  * Additional vlc stuff
 806  *****************************************************************************/
 807 #include "vlc_symbols.h"
 808 #include "os_specific.h"
 809 #include "vlc_messages.h"
 810 #include "variables.h"
 811 #include "vlc_objects.h"
 812 #include "vlc_threads_funcs.h"
 813 #include "mtime.h"
 814 #include "modules.h"
 815 #include "main.h"
 816 #include "configuration.h"
 817
 818 #if defined( __BORLANDC__ )
 819 #   undef PACKAGE
 820 #   define PACKAGE
 821 #endif
 822