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 1.5 2002/06/02 15:51:30 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  * Required system headers
  29  *****************************************************************************/
  30 #ifdef HAVE_STRING_H
  31 #   include <string.h>                                         /* strerror() */
  32 #endif
  33
  34 #ifdef HAVE_SYS_TYPES_H
  35 #   include <sys/types.h>
  36 #endif
  37
  38 /*****************************************************************************
  39  * Basic types definitions
  40  *****************************************************************************/
  41 #ifdef HAVE_STDINT_H
  42 #   include <stdint.h>
  43     typedef uint8_t             u8;
  44     typedef int8_t              s8;
  45
  46     typedef uint16_t            u16;
  47     typedef int16_t             s16;
  48
  49     typedef uint32_t            u32;
  50     typedef int32_t             s32;
  51
  52     typedef uint64_t            u64;
  53     typedef int64_t             s64;
  54 #else
  55     typedef unsigned char       u8;
  56     typedef signed char         s8;
  57
  58     typedef unsigned short      u16;
  59     typedef signed short        s16;
  60
  61     typedef unsigned int        u32;
  62     typedef signed int          s32;
  63
  64 #   if defined( _MSC_VER ) || ( defined( WIN32 ) && !defined( __MINGW32__ ) )
  65     typedef unsigned __int64    u64;
  66     typedef signed __int64      s64;
  67 #   else
  68     typedef unsigned long long  u64;
  69     typedef signed long long    s64;
  70 #   endif
  71 #endif
  72
  73 typedef u8                      byte_t;
  74
  75 /* ptrdiff_t definition */
  76 #ifdef HAVE_STDDEF_H
  77 #   include <stddef.h>
  78 #else
  79 #   include <malloc.h>
  80 #   ifndef _PTRDIFF_T
  81 #       define _PTRDIFF_T
  82 /* Not portable in a 64-bit environment. */
  83 typedef int                 ptrdiff_t;
  84 #   endif
  85 #endif
  86
  87 #if defined( WIN32 )
  88 typedef int                 ssize_t;
  89 #endif
  90
  91 /* Counter for statistics and profiling */
  92 typedef unsigned long       count_t;
  93
  94 /* DCT elements types */
  95 typedef s16                 dctelem_t;
  96
  97 /* Video buffer types */
  98 typedef u8                  yuv_data_t;
  99
 100 /*****************************************************************************
 101  * mtime_t: high precision date or time interval
 102  *****************************************************************************
 103  * Store an high precision date or time interval. The maximum precision is the
 104  * micro-second, and a 64 bits integer is used to avoid any overflow (maximum
 105  * time interval is then 292271 years, which should be long enough for any
 106  * video). Date are stored as a time interval since a common date.
 107  * Note that date and time intervals can be manipulated using regular
 108  * arithmetic operators, and that no special functions are required.
 109  *****************************************************************************/
 110 typedef s64 mtime_t;
 111
 112 /*****************************************************************************
 113  * Classes declaration
 114  *****************************************************************************/
 115
 116 /* Messages */
 117 VLC_DECLARE_STRUCT(msg_bank)
 118 VLC_DECLARE_STRUCT(msg_subscription)
 119
 120 /* Playlist */
 121 VLC_DECLARE_STRUCT(playlist)
 122 VLC_DECLARE_STRUCT(playlist_item)
 123
 124 /* Modules */
 125 VLC_DECLARE_STRUCT(module_bank)
 126 VLC_DECLARE_STRUCT(module)
 127 VLC_DECLARE_STRUCT(module_config)
 128 VLC_DECLARE_STRUCT(module_symbols)
 129 VLC_DECLARE_STRUCT(module_functions)
 130
 131 /* Interface */
 132 VLC_DECLARE_STRUCT(intf_thread)
 133 VLC_DECLARE_STRUCT(intf_sys)
 134 VLC_DECLARE_STRUCT(intf_console)
 135 VLC_DECLARE_STRUCT(intf_msg)
 136 VLC_DECLARE_STRUCT(intf_channel)
 137
 138 /* Input */
 139 VLC_DECLARE_STRUCT(input_thread)
 140 VLC_DECLARE_STRUCT(input_channel)
 141 VLC_DECLARE_STRUCT(input_cfg)
 142 VLC_DECLARE_STRUCT(input_area)
 143 VLC_DECLARE_STRUCT(input_buffers)
 144 VLC_DECLARE_STRUCT(input_socket)
 145
 146 /* Audio */
 147 VLC_DECLARE_STRUCT(aout_thread)
 148 VLC_DECLARE_STRUCT(aout_sys)
 149 VLC_DECLARE_STRUCT(aout_fifo)
 150
 151 /* Video */
 152 VLC_DECLARE_STRUCT(vout_thread)
 153 VLC_DECLARE_STRUCT(vout_font)
 154 VLC_DECLARE_STRUCT(vout_sys)
 155 VLC_DECLARE_STRUCT(chroma_sys)
 156 VLC_DECLARE_STRUCT(picture)
 157 VLC_DECLARE_STRUCT(picture_sys)
 158 VLC_DECLARE_STRUCT(picture_heap)
 159 VLC_DECLARE_STRUCT(subpicture)
 160 VLC_DECLARE_STRUCT(subpicture_sys)
 161
 162 /* Decoders */
 163 VLC_DECLARE_STRUCT(decoder_fifo)
 164
 165 /* Misc */
 166 VLC_DECLARE_STRUCT(macroblock)
 167 VLC_DECLARE_STRUCT(data_packet)
 168 VLC_DECLARE_STRUCT(data_buffer)
 169 VLC_DECLARE_STRUCT(downmix)
 170 VLC_DECLARE_STRUCT(imdct)
 171 VLC_DECLARE_STRUCT(complex)
 172 VLC_DECLARE_STRUCT(dm_par)
 173 VLC_DECLARE_STRUCT(es_descriptor)
 174 VLC_DECLARE_STRUCT(pgrm_descriptor)
 175 VLC_DECLARE_STRUCT(stream_descriptor)
 176 VLC_DECLARE_STRUCT(stream_position)
 177 VLC_DECLARE_STRUCT(stream_ctrl)
 178 VLC_DECLARE_STRUCT(pes_packet)
 179 VLC_DECLARE_STRUCT(bit_stream)
 180 VLC_DECLARE_STRUCT(network_socket)
 181 VLC_DECLARE_STRUCT(iso639_lang)
 182
 183 /*****************************************************************************
 184  * Plug-in stuff
 185  *****************************************************************************/
 186 #ifndef __PLUGIN__
 187 #   define VLC_EXPORT( type, name, args ) type name args;
 188 #else
 189 #   define VLC_EXPORT( type, name, args ) ;
 190     extern module_symbols_t* p_symbols;
 191 #endif
 192
 193 /*****************************************************************************
 194  * OS-specific headers and thread types
 195  *****************************************************************************/
 196 #if defined( WIN32 )
 197 #   define WIN32_LEAN_AND_MEAN
 198 #   include <windows.h>
 199 #endif
 200
 201 #include "vlc_threads.h"
 202
 203 /*****************************************************************************
 204  * Compiler-specific workarounds
 205  *****************************************************************************/
 206 #if defined( __BORLANDC__ )
 207 #   undef HAVE_VARIADIC_MACROS
 208 #endif
 209
 210 /*****************************************************************************
 211  * Common structure members
 212  *****************************************************************************/
 213
 214 /* VLC_COMMON_MEMBERS : members common to all basic vlc objects */
 215 #define VLC_COMMON_MEMBERS                                                  \
 216     int   i_object_id;                                                      \
 217     int   i_object_type;                                                    \
 218     char *psz_object_type;                                                  \
 219     char *psz_object_name;                                                  \
 220                                                                             \
 221     /* Thread properties, if any */                                         \
 222     vlc_bool_t   b_thread;                                                  \
 223     vlc_thread_t thread_id;                                                 \
 224     vlc_mutex_t  thread_lock;                                               \
 225     vlc_cond_t   thread_wait;                                               \
 226                                                                             \
 227     volatile vlc_bool_t b_error;                    /* set by the object */ \
 228     volatile vlc_bool_t b_die;                     /* set by the outside */ \
 229     volatile vlc_bool_t b_dead;                     /* set by the object */ \
 230                                                                             \
 231     vlc_t *         p_vlc;                           /* root of all evil */ \
 232                                                                             \
 233     volatile int    i_refcount;                                             \
 234     vlc_object_t ** pp_parents;                           /* our parents */ \
 235     volatile int    i_parents;                                              \
 236     vlc_object_t ** pp_children;                         /* our children */ \
 237     volatile int    i_children;                                             \
 238                                                                             \
 239     /* Just a reminder so that people don't cast garbage */                 \
 240     int be_sure_to_add_VLC_COMMON_MEMBERS_to_struct;                        \
 241
 242 /* The real vlc_object_t type. Yes, it's that simple :-) */
 243 struct vlc_object_s
 244 {
 245     VLC_COMMON_MEMBERS
 246 };
 247
 248 /* CAST_TO_VLC_OBJECT: attempt at doing a clever cast */
 249 #define CAST_TO_VLC_OBJECT( x ) \
 250     ((vlc_object_t *)(x))+0*(x)->be_sure_to_add_VLC_COMMON_MEMBERS_to_struct
 251
 252 /*****************************************************************************
 253  * Macros and inline functions
 254  *****************************************************************************/
 255 #ifdef NTOHL_IN_SYS_PARAM_H
 256 #   include <sys/param.h>
 257
 258 #elif defined(WIN32)
 259 /* Swap bytes in 16 bit value.  */
 260 #   define __bswap_constant_16(x) \
 261      ((((x) >> 8) & 0xff) | (((x) & 0xff) << 8))
 262
 263 #   if defined __GNUC__ && __GNUC__ >= 2
 264 #       define __bswap_16(x) \
 265             (__extension__                                                    \
 266              ({ register unsigned short int __v;                              \
 267                 if (__builtin_constant_p (x))                                 \
 268                   __v = __bswap_constant_16 (x);                              \
 269                 else                                                          \
 270                   __asm__ __volatile__ ("rorw $8, %w0"                        \
 271                                         : "=r" (__v)                          \
 272                                         : "0" ((unsigned short int) (x))      \
 273                                         : "cc");                              \
 274                 __v; }))
 275 #   else
 276 /* This is better than nothing.  */
 277 #       define __bswap_16(x) __bswap_constant_16 (x)
 278 #   endif
 279
 280 /* Swap bytes in 32 bit value.  */
 281 #   define __bswap_constant_32(x) \
 282         ((((x) & 0xff000000) >> 24) | (((x) & 0x00ff0000) >>  8) |            \
 283          (((x) & 0x0000ff00) <<  8) | (((x) & 0x000000ff) << 24))
 284
 285 #   if defined __GNUC__ && __GNUC__ >= 2
 286 /* To swap the bytes in a word the i486 processors and up provide the
 287    `bswap' opcode.  On i386 we have to use three instructions.  */
 288 #       if !defined __i486__ && !defined __pentium__ && !defined __pentiumpro__
 289 #           define __bswap_32(x) \
 290                 (__extension__                                                \
 291                  ({ register unsigned int __v;                                \
 292                     if (__builtin_constant_p (x))                             \
 293                       __v = __bswap_constant_32 (x);                          \
 294                     else                                                      \
 295                       __asm__ __volatile__ ("rorw $8, %w0;"                   \
 296                                             "rorl $16, %0;"                   \
 297                                             "rorw $8, %w0"                    \
 298                                             : "=r" (__v)                      \
 299                                             : "0" ((unsigned int) (x))        \
 300                                             : "cc");                          \
 301                     __v; }))
 302 #       else
 303 #           define __bswap_32(x) \
 304                 (__extension__                                                \
 305                  ({ register unsigned int __v;                                \
 306                     if (__builtin_constant_p (x))                             \
 307                       __v = __bswap_constant_32 (x);                          \
 308                     else                                                      \
 309                       __asm__ __volatile__ ("bswap %0"                        \
 310                                             : "=r" (__v)                      \
 311                                             : "0" ((unsigned int) (x)));      \
 312                     __v; }))
 313 #       endif
 314 #   else
 315 #       define __bswap_32(x) __bswap_constant_32 (x)
 316 #   endif
 317
 318 #   if defined __GNUC__ && __GNUC__ >= 2
 319 /* Swap bytes in 64 bit value.  */
 320 #       define __bswap_constant_64(x) \
 321             ((((x) & 0xff00000000000000ull) >> 56)                            \
 322              | (((x) & 0x00ff000000000000ull) >> 40)                          \
 323              | (((x) & 0x0000ff0000000000ull) >> 24)                          \
 324              | (((x) & 0x000000ff00000000ull) >> 8)                           \
 325              | (((x) & 0x00000000ff000000ull) << 8)                           \
 326              | (((x) & 0x0000000000ff0000ull) << 24)                          \
 327              | (((x) & 0x000000000000ff00ull) << 40)                          \
 328              | (((x) & 0x00000000000000ffull) << 56))
 329
 330 #       define __bswap_64(x) \
 331             (__extension__                                                    \
 332              ({ union { __extension__ unsigned long long int __ll;            \
 333                         unsigned long int __l[2]; } __w, __r;                 \
 334                 if (__builtin_constant_p (x))                                 \
 335                   __r.__ll = __bswap_constant_64 (x);                         \
 336                 else                                                          \
 337                   {                                                           \
 338                     __w.__ll = (x);                                           \
 339                     __r.__l[0] = __bswap_32 (__w.__l[1]);                     \
 340                     __r.__l[1] = __bswap_32 (__w.__l[0]);                     \
 341                   }                                                           \
 342                 __r.__ll; }))
 343 #   else
 344 #       define __bswap_64(i) \
 345             (u64)((__bswap_32((i) & 0xffffffff) << 32) |                      \
 346             __bswap_32(((i) >> 32) & 0xffffffff ))
 347 #   endif
 348
 349 #else /* NTOHL_IN_SYS_PARAM_H || WIN32 */
 350 #   include <netinet/in.h>
 351
 352 #endif /* NTOHL_IN_SYS_PARAM_H || WIN32 */
 353
 354 /* CEIL: division with round to nearest greater integer */
 355 #define CEIL(n, d)  ( ((n) / (d)) + ( ((n) % (d)) ? 1 : 0) )
 356
 357 /* PAD: PAD(n, d) = CEIL(n ,d) * d */
 358 #define PAD(n, d)   ( ((n) % (d)) ? ((((n) / (d)) + 1) * (d)) : (n) )
 359
 360 /* __MAX and __MIN: self explanatory */
 361 #ifndef __MAX
 362 #   define __MAX(a, b)   ( ((a) > (b)) ? (a) : (b) )
 363 #endif
 364 #ifndef __MIN
 365 #   define __MIN(a, b)   ( ((a) < (b)) ? (a) : (b) )
 366 #endif
 367
 368 /* MSB (big endian)/LSB (little endian) conversions - network order is always
 369  * MSB, and should be used for both network communications and files. Note that
 370  * byte orders other than little and big endians are not supported, but only
 371  * the VAX seems to have such exotic properties - note that these 'functions'
 372  * needs <netinet/in.h> or the local equivalent. */
 373 #if !defined( WIN32 )
 374 #if WORDS_BIGENDIAN
 375 #   define hton16      htons
 376 #   define hton32      htonl
 377 #   define hton64(i)   ( i )
 378 #   define ntoh16      ntohs
 379 #   define ntoh32      ntohl
 380 #   define ntoh64(i)   ( i )
 381 #else
 382 #   define hton16      htons
 383 #   define hton32      htonl
 384     static inline u64 __hton64( u64 i )
 385     {
 386         return ((u64)(htonl((i) & 0xffffffff)) << 32)
 387                 | htonl(((i) >> 32) & 0xffffffff );
 388     }
 389 #   define hton64(i)   __hton64( i )
 390 #   define ntoh16      ntohs
 391 #   define ntoh32      ntohl
 392 #   define ntoh64      hton64
 393 #endif
 394 #endif /* !defined( WIN32 ) */
 395
 396 /* Macros with automatic casts */
 397 #define U64_AT(p)   ( ntoh64 ( *( (u64 *)(p) ) ) )
 398 #define U32_AT(p)   ( ntoh32 ( *( (u32 *)(p) ) ) )
 399 #define U16_AT(p)   ( ntoh16 ( *( (u16 *)(p) ) ) )
 400
 401 /* Alignment of critical static data structures */
 402 #ifdef ATTRIBUTE_ALIGNED_MAX
 403 #   define ATTR_ALIGN(align) __attribute__ ((__aligned__ ((ATTRIBUTE_ALIGNED_MAX < align) ? ATTRIBUTE_ALIGNED_MAX : align)))
 404 #else
 405 #   define ATTR_ALIGN(align)
 406 #endif
 407
 408 /* Alignment of critical dynamic data structure
 409  *
 410  * Not all platforms support memalign so we provide a vlc_memalign wrapper
 411  * void *vlc_memalign( size_t align, size_t size, void **pp_orig )
 412  * *pp_orig is the pointer that has to be freed afterwards.
 413  */
 414 #if 0
 415 #ifdef HAVE_POSIX_MEMALIGN
 416 #   define vlc_memalign(align,size,pp_orig) \
 417     ( !posix_memalign( pp_orig, align, size ) ? *(pp_orig) : NULL )
 418 #endif
 419 #endif
 420 #ifdef HAVE_MEMALIGN
 421     /* Some systems have memalign() but no declaration for it */
 422     void * memalign( size_t align, size_t size );
 423
 424 #   define vlc_memalign(pp_orig,align,size) \
 425     ( *(pp_orig) = memalign( align, size ) )
 426
 427 #else /* We don't have any choice but to align manually */
 428 #   define vlc_memalign(pp_orig,align,size) \
 429     (( *(pp_orig) = malloc( size + align - 1 )) \
 430         ? (void *)( (((unsigned long)*(pp_orig)) + (unsigned long)(align-1) ) \
 431                        & (~(unsigned long)(align-1)) ) \
 432         : NULL )
 433
 434 #endif
 435
 436
 437 #define I64C(x)         x##LL
 438
 439
 440 #if defined( WIN32 )
 441 /* The ntoh* and hton* bytes swapping functions are provided by winsock
 442  * but for conveniency and speed reasons it is better to implement them
 443  * ourselves. ( several plugins use them and it is too much hassle to link
 444  * winsock with each of them ;-)
 445  */
 446 #   ifdef WORDS_BIGENDIAN
 447 #       define ntoh32(x)       (x)
 448 #       define ntoh16(x)       (x)
 449 #       define ntoh64(x)       (x)
 450 #       define hton32(x)       (x)
 451 #       define hton16(x)       (x)
 452 #       define hton64(x)       (x)
 453 #   else
 454 #       define ntoh32(x)     __bswap_32 (x)
 455 #       define ntoh16(x)     __bswap_16 (x)
 456 #       define ntoh64(x)     __bswap_32 (x)
 457 #       define hton32(x)     __bswap_32 (x)
 458 #       define hton16(x)     __bswap_16 (x)
 459 #       define hton64(x)     __bswap_64 (x)
 460 #   endif
 461
 462 /* win32, cl and icl support */
 463 #   if defined( _MSC_VER ) || !defined( __MINGW32__ )
 464 #       define __attribute__(x)
 465 #       define __inline__      __inline
 466 #       define strncasecmp     strnicmp
 467 #       define strcasecmp      stricmp
 468 #       define S_IFBLK         0x3000  /* Block */
 469 #       define S_ISBLK(m)      (0)
 470 #       define S_ISCHR(m)      (0)
 471 #       define S_ISFIFO(m)     (((m)&_S_IFMT) == _S_IFIFO)
 472 #       define S_ISREG(m)      (((m)&_S_IFMT) == _S_IFREG)
 473 #       undef I64C
 474 #       define I64C(x)         x##i64
 475 #   endif
 476
 477 /* several type definitions */
 478 #   if defined( __MINGW32__ )
 479 #       if !defined( _OFF_T_ )
 480 typedef long long _off_t;
 481 typedef _off_t off_t;
 482 #           define _OFF_T_
 483 #       else
 484 #           define off_t long long
 485 #       endif
 486 #   endif
 487
 488 #   if defined( _MSC_VER )
 489 #       if !defined( _OFF_T_DEFINED )
 490 typedef __int64 off_t;
 491 #           define _OFF_T_DEFINED
 492 #       else
 493 #           define off_t __int64
 494 #       endif
 495 #   endif
 496
 497 #   if defined( __BORLANDC__ )
 498 #       undef off_t
 499 #       define off_t unsigned __int64
 500 #   endif
 501
 502 #   ifndef O_NONBLOCK
 503 #       define O_NONBLOCK 0
 504 #   endif
 505
 506 #   ifndef snprintf
 507 #       define snprintf _snprintf  /* snprintf not defined in mingw32 (bug?) */
 508 #   endif
 509
 510 #endif
 511
 512 /*****************************************************************************
 513  * CPU capabilities
 514  *****************************************************************************/
 515 #define CPU_CAPABILITY_NONE    0
 516 #define CPU_CAPABILITY_486     (1<<0)
 517 #define CPU_CAPABILITY_586     (1<<1)
 518 #define CPU_CAPABILITY_PPRO    (1<<2)
 519 #define CPU_CAPABILITY_MMX     (1<<3)
 520 #define CPU_CAPABILITY_3DNOW   (1<<4)
 521 #define CPU_CAPABILITY_MMXEXT  (1<<5)
 522 #define CPU_CAPABILITY_SSE     (1<<6)
 523 #define CPU_CAPABILITY_ALTIVEC (1<<16)
 524 #define CPU_CAPABILITY_FPU     (1<<31)
 525
 526 /*****************************************************************************
 527  * I18n stuff
 528  *****************************************************************************/
 529 #ifndef PACKAGE /* Borland C++ uses this ! */
 530 #define PACKAGE VLC_PACKAGE
 531 #endif
 532 #define VERSION VLC_VERSION
 533
 534 #if defined( ENABLE_NLS ) && defined ( HAVE_GETTEXT ) && !defined( __BORLANDC__ ) && !defined( MODULE_NAME_IS_gnome )
 535 #   include <libintl.h>
 536 #   undef _
 537 #   define _(String) dgettext (PACKAGE, String)
 538 #   ifdef gettext_noop
 539 #       define N_(String) gettext_noop (String)
 540 #   else
 541 #       define N_(String) (String)
 542 #   endif
 543 #elif !defined( MODULE_NAME_IS_gnome )
 544 #   define _(String) (String)
 545 #   define N_(String) (String)
 546 #endif
 547
 548 /*****************************************************************************
 549  * Plug-in stuff
 550  *****************************************************************************/
 551 #include "vlc_symbols.h"