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vlc_common.h
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1 /*****************************************************************************
2  * vlc_common.h: common definitions
3  * Collection of useful common types and macros definitions
4  *****************************************************************************
5  * Copyright (C) 1998-2011 VLC authors and VideoLAN
6  *
7  * Authors: Samuel Hocevar <sam@via.ecp.fr>
8  * Vincent Seguin <seguin@via.ecp.fr>
9  * Gildas Bazin <gbazin@videolan.org>
10  * RĂ©mi Denis-Courmont
11  *
12  * This program is free software; you can redistribute it and/or modify it
13  * under the terms of the GNU Lesser General Public License as published by
14  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public License
23  * along with this program; if not, write to the Free Software Foundation,
24  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
25  *****************************************************************************/
26 
32 #ifndef VLC_COMMON_H
33 # define VLC_COMMON_H 1
34 
35 /*****************************************************************************
36  * Required vlc headers
37  *****************************************************************************/
38 #include "vlc_config.h"
39 
40 /*****************************************************************************
41  * Required system headers
42  *****************************************************************************/
43 #include <stdlib.h>
44 #include <stdarg.h>
45 
46 #include <string.h>
47 #include <stdio.h>
48 #include <inttypes.h>
49 #include <stddef.h>
50 
51 #ifndef __cplusplus
52 # include <stdbool.h>
53 #endif
54 
55 /*****************************************************************************
56  * Compilers definitions
57  *****************************************************************************/
58 /* Helper for GCC version checks */
59 #ifdef __GNUC__
60 # define VLC_GCC_VERSION(maj,min) \
61  ((__GNUC__ > (maj)) || (__GNUC__ == (maj) && __GNUC_MINOR__ >= (min)))
62 #else
63 # define VLC_GCC_VERSION(maj,min) (0)
64 #endif
65 
66 /* Try to fix format strings for all versions of mingw and mingw64 */
67 #if defined( _WIN32 ) && defined( __USE_MINGW_ANSI_STDIO )
68  #undef PRId64
69  #define PRId64 "lld"
70  #undef PRIi64
71  #define PRIi64 "lli"
72  #undef PRIu64
73  #define PRIu64 "llu"
74  #undef PRIo64
75  #define PRIo64 "llo"
76  #undef PRIx64
77  #define PRIx64 "llx"
78  #define snprintf __mingw_snprintf
79  #define vsnprintf __mingw_vsnprintf
80  #define swprintf _snwprintf
81 #endif
82 
83 /* Function attributes for compiler warnings */
84 #ifdef __GNUC__
85 # define VLC_DEPRECATED __attribute__((deprecated))
86 
87 # if defined( _WIN32 ) && VLC_GCC_VERSION(4,4)
88 # define VLC_FORMAT(x,y) __attribute__ ((format(gnu_printf,x,y)))
89 # else
90 # define VLC_FORMAT(x,y) __attribute__ ((format(printf,x,y)))
91 # endif
92 # define VLC_FORMAT_ARG(x) __attribute__ ((format_arg(x)))
93 
94 # define VLC_MALLOC __attribute__ ((malloc))
95 # define VLC_NORETURN __attribute__ ((noreturn))
96 
97 # if VLC_GCC_VERSION(3,4)
98 # define VLC_USED __attribute__ ((warn_unused_result))
99 # else
100 # define VLC_USED
101 # endif
102 
103 #else
104 # define VLC_DEPRECATED
105 # define VLC_FORMAT(x,y)
106 # define VLC_FORMAT_ARG(x)
107 # define VLC_MALLOC
108 # define VLC_NORETURN
109 # define VLC_USED
110 #endif
111 
112 
113 /* Branch prediction */
114 #ifdef __GNUC__
115 # define likely(p) __builtin_expect(!!(p), 1)
116 # define unlikely(p) __builtin_expect(!!(p), 0)
117 #else
118 # define likely(p) (!!(p))
119 # define unlikely(p) (!!(p))
120 #endif
121 
122 /* Linkage */
123 #ifdef __cplusplus
124 # define VLC_EXTERN extern "C"
125 #else
126 # define VLC_EXTERN
127 #endif
128 
129 #if defined (_WIN32) && defined (DLL_EXPORT)
130 # define VLC_EXPORT __declspec(dllexport)
131 #elif VLC_GCC_VERSION(4,0)
132 # define VLC_EXPORT __attribute__((visibility("default")))
133 #else
134 # define VLC_EXPORT
135 #endif
136 
137 #define VLC_API VLC_EXTERN VLC_EXPORT
138 
139 
140 /*****************************************************************************
141  * Basic types definitions
142  *****************************************************************************/
153 typedef int64_t mtime_t;
154 
160 typedef uint32_t vlc_fourcc_t;
161 
162 #ifdef WORDS_BIGENDIAN
163 # define VLC_FOURCC( a, b, c, d ) \
164  ( ((uint32_t)d) | ( ((uint32_t)c) << 8 ) \
165  | ( ((uint32_t)b) << 16 ) | ( ((uint32_t)a) << 24 ) )
166 # define VLC_TWOCC( a, b ) \
167  ( (uint16_t)(b) | ( (uint16_t)(a) << 8 ) )
168 
169 #else
170 # define VLC_FOURCC( a, b, c, d ) \
171  ( ((uint32_t)a) | ( ((uint32_t)b) << 8 ) \
172  | ( ((uint32_t)c) << 16 ) | ( ((uint32_t)d) << 24 ) )
173 # define VLC_TWOCC( a, b ) \
174  ( (uint16_t)(a) | ( (uint16_t)(b) << 8 ) )
175 
176 #endif
177 
185 static inline void vlc_fourcc_to_char( vlc_fourcc_t fcc, char *psz_fourcc )
186 {
187  memcpy( psz_fourcc, &fcc, 4 );
188 }
189 
190 #define vlc_fourcc_to_char( a, b ) \
191  vlc_fourcc_to_char( (vlc_fourcc_t)(a), (char *)(b) )
192 
193 /*****************************************************************************
194  * Classes declaration
195  *****************************************************************************/
196 
197 /* Internal types */
198 typedef struct vlc_list_t vlc_list_t;
199 typedef struct vlc_object_t vlc_object_t;
200 typedef struct libvlc_int_t libvlc_int_t;
201 typedef struct date_t date_t;
202 
203 /* Playlist */
204 
205 /* FIXME */
209 typedef enum {
217 
218 
219 typedef struct playlist_t playlist_t;
220 typedef struct playlist_item_t playlist_item_t;
222 typedef struct services_discovery_sys_t services_discovery_sys_t;
223 typedef struct playlist_add_t playlist_add_t;
224 
225 /* Modules */
226 typedef struct module_t module_t;
227 typedef struct module_config_t module_config_t;
228 
229 typedef struct config_category_t config_category_t;
230 
231 /* Input */
232 typedef struct input_thread_t input_thread_t;
233 typedef struct input_item_t input_item_t;
234 typedef struct input_item_node_t input_item_node_t;
235 typedef struct access_t access_t;
236 typedef struct access_sys_t access_sys_t;
237 typedef struct stream_t stream_t;
238 typedef struct stream_sys_t stream_sys_t;
239 typedef struct demux_t demux_t;
240 typedef struct demux_sys_t demux_sys_t;
241 typedef struct es_out_t es_out_t;
242 typedef struct es_out_id_t es_out_id_t;
243 typedef struct es_out_sys_t es_out_sys_t;
244 typedef struct seekpoint_t seekpoint_t;
245 typedef struct info_t info_t;
246 typedef struct info_category_t info_category_t;
248 
249 /* Format */
250 typedef struct audio_format_t audio_format_t;
251 typedef struct video_format_t video_format_t;
252 typedef struct subs_format_t subs_format_t;
253 typedef struct es_format_t es_format_t;
254 typedef struct video_palette_t video_palette_t;
255 
256 /* Audio */
257 typedef struct audio_output audio_output_t;
258 typedef struct aout_sys_t aout_sys_t;
260 
261 /* Video */
262 typedef struct vout_thread_t vout_thread_t;
263 
265 typedef struct picture_t picture_t;
266 typedef struct picture_sys_t picture_sys_t;
267 
268 /* Subpictures */
269 typedef struct spu_t spu_t;
270 typedef struct subpicture_t subpicture_t;
272 
273 typedef struct image_handler_t image_handler_t;
274 
275 /* Stream output */
276 typedef struct sout_instance_t sout_instance_t;
277 
278 typedef struct sout_input_t sout_input_t;
279 typedef struct sout_packetizer_input_t sout_packetizer_input_t;
280 
281 typedef struct sout_access_out_t sout_access_out_t;
282 typedef struct sout_access_out_sys_t sout_access_out_sys_t;
283 
284 typedef struct sout_mux_t sout_mux_t;
285 typedef struct sout_mux_sys_t sout_mux_sys_t;
286 
287 typedef struct sout_stream_t sout_stream_t;
288 typedef struct sout_stream_sys_t sout_stream_sys_t;
289 
290 typedef struct config_chain_t config_chain_t;
291 typedef struct session_descriptor_t session_descriptor_t;
292 
293 /* Decoders */
294 typedef struct decoder_t decoder_t;
295 typedef struct decoder_sys_t decoder_sys_t;
296 typedef struct decoder_synchro_t decoder_synchro_t;
297 
298 /* Encoders */
299 typedef struct encoder_t encoder_t;
300 typedef struct encoder_sys_t encoder_sys_t;
301 
302 /* Filters */
303 typedef struct filter_t filter_t;
304 typedef struct filter_sys_t filter_sys_t;
305 
306 /* Network */
307 typedef struct virtual_socket_t v_socket_t;
308 typedef struct vlc_url_t vlc_url_t;
309 
310 /* Misc */
311 typedef struct iso639_lang_t iso639_lang_t;
312 
313 /* block */
314 typedef struct block_t block_t;
315 typedef struct block_fifo_t block_fifo_t;
316 
317 /* Hashing */
318 typedef struct md5_s md5_t;
319 
320 /* XML */
321 typedef struct xml_t xml_t;
322 typedef struct xml_sys_t xml_sys_t;
323 typedef struct xml_reader_t xml_reader_t;
324 typedef struct xml_reader_sys_t xml_reader_sys_t;
325 
326 /* vod server */
327 typedef struct vod_t vod_t;
328 typedef struct vod_sys_t vod_sys_t;
329 typedef struct vod_media_t vod_media_t;
330 
331 /* VLM */
332 typedef struct vlm_t vlm_t;
333 typedef struct vlm_message_t vlm_message_t;
334 
335 /* misc */
336 typedef struct vlc_meta_t vlc_meta_t;
337 typedef struct input_stats_t input_stats_t;
338 
339 /* Update */
340 typedef struct update_t update_t;
341 
345 typedef union
346 {
347  int64_t i_int;
348  bool b_bool;
349  float f_float;
350  char * psz_string;
351  void * p_address;
352  vlc_object_t * p_object;
353  vlc_list_t * p_list;
354  mtime_t i_time;
355  struct { int32_t x; int32_t y; } coords;
356 
357 } vlc_value_t;
358 
363 {
364  int i_count;
365  vlc_value_t * p_values;
366  int * pi_types;
367 
368 };
369 
370 /*****************************************************************************
371  * Error values (shouldn't be exposed)
372  *****************************************************************************/
373 #define VLC_SUCCESS (-0)
374 #define VLC_EGENERIC (-1)
375 #define VLC_ENOMEM (-2)
376 #define VLC_ETIMEOUT (-3)
377 #define VLC_ENOMOD (-4)
378 #define VLC_ENOOBJ (-5)
379 #define VLC_ENOVAR (-6)
380 #define VLC_EBADVAR (-7)
381 #define VLC_ENOITEM (-8)
383 /*****************************************************************************
384  * Variable callbacks
385  *****************************************************************************/
386 typedef int ( * vlc_callback_t ) ( vlc_object_t *, /* variable's object */
387  char const *, /* variable name */
388  vlc_value_t, /* old value */
389  vlc_value_t, /* new value */
390  void * ); /* callback data */
391 
392 /*****************************************************************************
393  * OS-specific headers and thread types
394  *****************************************************************************/
395 #if defined( _WIN32 )
396 # include <malloc.h>
397 # ifndef PATH_MAX
398 # define PATH_MAX MAX_PATH
399 # endif
400 # include <windows.h>
401 #endif
402 
403 #ifdef __SYMBIAN32__
404  #include <sys/syslimits.h>
405 #endif
406 
407 #ifdef __OS2__
408 # define OS2EMX_PLAIN_CHAR
409 # define INCL_BASE
410 # define INCL_PM
411 # include <os2safe.h>
412 # include <os2.h>
413 #endif
414 
415 #include "vlc_mtime.h"
416 #include "vlc_threads.h"
417 
418 /*****************************************************************************
419  * Common structure members
420  *****************************************************************************/
421 
422 /* VLC_COMMON_MEMBERS : members common to all basic vlc objects */
423 #define VLC_COMMON_MEMBERS \
424  \
427  \
428  const char *psz_object_type; \
429  \
430  /* Messages header */ \
431  char *psz_header; \
432  int i_flags; \
433  \
434  /* Object properties */ \
435  bool b_force; \
436  \
437  /* Stuff related to the libvlc structure */ \
438  libvlc_int_t *p_libvlc; \
439  \
440  vlc_object_t * p_parent; \
441  \
442  \
443 
444 /* VLC_OBJECT: attempt at doing a clever cast */
445 #if VLC_GCC_VERSION(4,0)
446 # ifndef __cplusplus
447 # define VLC_OBJECT( x ) \
448  __builtin_choose_expr( \
449  __builtin_offsetof(__typeof__(*(x)), psz_object_type), \
450  (void)0 /* screw you */, \
451  (vlc_object_t *)(x))
452 # else
453 # define VLC_OBJECT( x ) \
454  ((vlc_object_t *)(x) \
455  + 0 * __builtin_offsetof(__typeof__(*(x)), psz_object_type))
456 # endif
457 #else
458 # define VLC_OBJECT( x ) ((vlc_object_t *)(x))
459 #endif
460 
461 /*****************************************************************************
462  * Macros and inline functions
463  *****************************************************************************/
464 
465 /* CEIL: division with round to nearest greater integer */
466 #define CEIL(n, d) ( ((n) / (d)) + ( ((n) % (d)) ? 1 : 0) )
467 
468 /* PAD: PAD(n, d) = CEIL(n ,d) * d */
469 #define PAD(n, d) ( ((n) % (d)) ? ((((n) / (d)) + 1) * (d)) : (n) )
470 
471 /* __MAX and __MIN: self explanatory */
472 #ifndef __MAX
473 # define __MAX(a, b) ( ((a) > (b)) ? (a) : (b) )
474 #endif
475 #ifndef __MIN
476 # define __MIN(a, b) ( ((a) < (b)) ? (a) : (b) )
477 #endif
478 
479 /* clip v in [min, max] */
480 #define VLC_CLIP(v, min, max) __MIN(__MAX((v), (min)), (max))
481 
482 VLC_USED
483 static inline int64_t GCD ( int64_t a, int64_t b )
484 {
485  while( b )
486  {
487  int64_t c = a % b;
488  a = b;
489  b = c;
490  }
491  return a;
492 }
493 
494 /* function imported from libavutil/common.h */
495 VLC_USED
496 static inline uint8_t clip_uint8_vlc( int32_t a )
497 {
498  if( a&(~255) ) return (-a)>>31;
499  else return a;
500 }
501 
503 VLC_USED
504 static inline unsigned clz (unsigned x)
505 {
506 #if VLC_GCC_VERSION(3,4)
507  return __builtin_clz (x);
508 #else
509  unsigned i = sizeof (x) * 8;
510 
511  while (x)
512  {
513  x >>= 1;
514  i--;
515  }
516  return i;
517 #endif
518 }
519 
520 #define clz8( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint8_t)) * 8))
521 #define clz16( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint16_t)) * 8))
522 /* XXX: this assumes that int is 32-bits or more */
523 #define clz32( x ) (clz(x) - ((sizeof(unsigned) - sizeof (uint32_t)) * 8))
524 
526 VLC_USED
527 static inline unsigned ctz (unsigned x)
528 {
529 #if VLC_GCC_VERSION(3,4)
530  return __builtin_ctz (x);
531 #else
532  unsigned i = sizeof (x) * 8;
533 
534  while (x)
535  {
536  x <<= 1;
537  i--;
538  }
539  return i;
540 #endif
541 }
542 
544 VLC_USED
545 static inline unsigned popcount (unsigned x)
546 {
547 #if VLC_GCC_VERSION(3,4)
548  return __builtin_popcount (x);
549 #else
550  unsigned count = 0;
551  while (x)
552  {
553  count += x & 1;
554  x = x >> 1;
555  }
556  return count;
557 #endif
558 }
559 
560 VLC_USED
561 static inline unsigned parity (unsigned x)
562 {
563 #if VLC_GCC_VERSION(3,4)
564  return __builtin_parity (x);
565 #else
566  for (unsigned i = 4 * sizeof (x); i > 0; i /= 2)
567  x ^= x >> i;
568  return x & 1;
569 #endif
570 }
571 
572 #ifdef __OS2__
573 # undef bswap16
574 # undef bswap32
575 # undef bswap64
576 #endif
577 
579 VLC_USED
580 static inline uint16_t bswap16 (uint16_t x)
581 {
582  return (x << 8) | (x >> 8);
583 }
584 
586 VLC_USED
587 static inline uint32_t bswap32 (uint32_t x)
588 {
589 #if VLC_GCC_VERSION(4,3) || defined(__clang__)
590  return __builtin_bswap32 (x);
591 #else
592  return ((x & 0x000000FF) << 24)
593  | ((x & 0x0000FF00) << 8)
594  | ((x & 0x00FF0000) >> 8)
595  | ((x & 0xFF000000) >> 24);
596 #endif
597 }
598 
600 VLC_USED
601 static inline uint64_t bswap64 (uint64_t x)
602 {
603 #if VLC_GCC_VERSION(4,3) || defined(__clang__)
604  return __builtin_bswap64 (x);
605 #elif !defined (__cplusplus)
606  return ((x & 0x00000000000000FF) << 56)
607  | ((x & 0x000000000000FF00) << 40)
608  | ((x & 0x0000000000FF0000) << 24)
609  | ((x & 0x00000000FF000000) << 8)
610  | ((x & 0x000000FF00000000) >> 8)
611  | ((x & 0x0000FF0000000000) >> 24)
612  | ((x & 0x00FF000000000000) >> 40)
613  | ((x & 0xFF00000000000000) >> 56);
614 #else
615  return ((x & 0x00000000000000FFULL) << 56)
616  | ((x & 0x000000000000FF00ULL) << 40)
617  | ((x & 0x0000000000FF0000ULL) << 24)
618  | ((x & 0x00000000FF000000ULL) << 8)
619  | ((x & 0x000000FF00000000ULL) >> 8)
620  | ((x & 0x0000FF0000000000ULL) >> 24)
621  | ((x & 0x00FF000000000000ULL) >> 40)
622  | ((x & 0xFF00000000000000ULL) >> 56);
623 #endif
624 }
625 
626 
627 /* Free and set set the variable to NULL */
628 #define FREENULL(a) do { free( a ); a = NULL; } while(0)
629 
630 #define EMPTY_STR(str) (!str || !*str)
631 
632 VLC_API char const * vlc_error( int ) VLC_USED;
633 
634 #include <vlc_arrays.h>
635 
636 /* MSB (big endian)/LSB (little endian) conversions - network order is always
637  * MSB, and should be used for both network communications and files. */
638 
639 #ifdef WORDS_BIGENDIAN
640 # define hton16(i) ((uint16_t)(i))
641 # define hton32(i) ((uint32_t)(i))
642 # define hton64(i) ((uint64_t)(i))
643 #else
644 # define hton16(i) bswap16(i)
645 # define hton32(i) bswap32(i)
646 # define hton64(i) bswap64(i)
647 #endif
648 #define ntoh16(i) hton16(i)
649 #define ntoh32(i) hton32(i)
650 #define ntoh64(i) hton64(i)
651 
653 VLC_USED
654 static inline uint16_t U16_AT (const void *p)
655 {
656  uint16_t x;
657 
658  memcpy (&x, p, sizeof (x));
659  return ntoh16 (x);
660 }
661 
663 VLC_USED
664 static inline uint32_t U32_AT (const void *p)
665 {
666  uint32_t x;
667 
668  memcpy (&x, p, sizeof (x));
669  return ntoh32 (x);
670 }
671 
673 VLC_USED
674 static inline uint64_t U64_AT (const void *p)
675 {
676  uint64_t x;
677 
678  memcpy (&x, p, sizeof (x));
679  return ntoh64 (x);
680 }
681 
682 #define GetWBE(p) U16_AT(p)
683 #define GetDWBE(p) U32_AT(p)
684 #define GetQWBE(p) U64_AT(p)
685 
687 VLC_USED
688 static inline uint16_t GetWLE (const void *p)
689 {
690  uint16_t x;
691 
692  memcpy (&x, p, sizeof (x));
693 #ifdef WORDS_BIGENDIAN
694  x = bswap16 (x);
695 #endif
696  return x;
697 }
698 
700 VLC_USED
701 static inline uint32_t GetDWLE (const void *p)
702 {
703  uint32_t x;
704 
705  memcpy (&x, p, sizeof (x));
706 #ifdef WORDS_BIGENDIAN
707  x = bswap32 (x);
708 #endif
709  return x;
710 }
711 
713 VLC_USED
714 static inline uint64_t GetQWLE (const void *p)
715 {
716  uint64_t x;
717 
718  memcpy (&x, p, sizeof (x));
719 #ifdef WORDS_BIGENDIAN
720  x = bswap64 (x);
721 #endif
722  return x;
723 }
724 
726 static inline void SetWBE (void *p, uint16_t w)
727 {
728  w = hton16 (w);
729  memcpy (p, &w, sizeof (w));
730 }
731 
733 static inline void SetDWBE (void *p, uint32_t dw)
734 {
735  dw = hton32 (dw);
736  memcpy (p, &dw, sizeof (dw));
737 }
738 
740 static inline void SetQWBE (void *p, uint64_t qw)
741 {
742  qw = hton64 (qw);
743  memcpy (p, &qw, sizeof (qw));
744 }
745 
747 static inline void SetWLE (void *p, uint16_t w)
748 {
749 #ifdef WORDS_BIGENDIAN
750  w = bswap16 (w);
751 #endif
752  memcpy (p, &w, sizeof (w));
753 }
754 
756 static inline void SetDWLE (void *p, uint32_t dw)
757 {
758 #ifdef WORDS_BIGENDIAN
759  dw = bswap32 (dw);
760 #endif
761  memcpy (p, &dw, sizeof (dw));
762 }
763 
765 static inline void SetQWLE (void *p, uint64_t qw)
766 {
767 #ifdef WORDS_BIGENDIAN
768  qw = bswap64 (qw);
769 #endif
770  memcpy (p, &qw, sizeof (qw));
771 }
772 
773 /* */
774 #define VLC_UNUSED(x) (void)(x)
775 
776 /* Stuff defined in src/extras/libc.c */
777 
778 #if defined(_WIN32)
779 /* several type definitions */
780 # if defined( __MINGW32__ )
781 # if !defined( _OFF_T_ )
782  typedef long long _off_t;
783  typedef _off_t off_t;
784 # define _OFF_T_
785 # else
786 # ifdef off_t
787 # undef off_t
788 # endif
789 # define off_t long long
790 # endif
791 # endif
792 
793 # ifndef O_NONBLOCK
794 # define O_NONBLOCK 0
795 # endif
796 
797 # include <tchar.h>
798 #endif /* _WIN32 */
799 
800 VLC_API bool vlc_ureduce( unsigned *, unsigned *, uint64_t, uint64_t, uint64_t );
801 
802 /* Aligned memory allocator */
803 #ifdef __APPLE__
804 #include <AvailabilityMacros.h>
805 #endif
806 
807 #ifdef _WIN32
808 # define vlc_memalign(align, size) (__mingw_aligned_malloc(size, align))
809 # define vlc_free(base) (__mingw_aligned_free(base))
810 #elif defined(__APPLE__) && !defined(MAC_OS_X_VERSION_10_6)
811 static inline void *vlc_memalign(size_t align, size_t size)
812 {
813  long diff;
814  void *ptr;
815 
816  ptr = malloc(size+align);
817  if(!ptr)
818  return ptr;
819  diff = ((-(long)ptr - 1)&(align-1)) + 1;
820  ptr = (char*)ptr + diff;
821  ((char*)ptr)[-1]= diff;
822  return ptr;
823 }
824 
825 static void vlc_free(void *ptr)
826 {
827  if (ptr)
828  free((char*)ptr - ((char*)ptr)[-1]);
829 }
830 #else
831 static inline void *vlc_memalign(size_t align, size_t size)
832 {
833  void *base;
834  if (unlikely(posix_memalign(&base, align, size)))
835  base = NULL;
836  return base;
837 }
838 # define vlc_free(base) free(base)
839 #endif
840 
841 VLC_API void vlc_tdestroy( void *, void (*)(void *) );
842 
843 /*****************************************************************************
844  * I18n stuff
845  *****************************************************************************/
846 VLC_API char *vlc_gettext( const char *msgid ) VLC_FORMAT_ARG(1);
847 VLC_API char *vlc_ngettext( const char *s, const char *p, unsigned long n ) VLC_FORMAT_ARG(1) VLC_FORMAT_ARG(2);
848 
849 #define vlc_pgettext( ctx, id ) \
850  vlc_pgettext_aux( ctx "\004" id, id )
851 
852 VLC_FORMAT_ARG(2)
853 static inline const char *vlc_pgettext_aux( const char *ctx, const char *id )
854 {
855  const char *tr = vlc_gettext( ctx );
856  return (tr == ctx) ? id : tr;
857 }
858 
859 /*****************************************************************************
860  * Loosy memory allocation functions. Do not use in new code.
861  *****************************************************************************/
862 static inline void *xmalloc (size_t len)
863 {
864  void *ptr = malloc (len);
865  if (unlikely (ptr == NULL))
866  abort ();
867  return ptr;
868 }
869 
870 static inline void *xrealloc (void *ptr, size_t len)
871 {
872  void *nptr = realloc (ptr, len);
873  if (unlikely (nptr == NULL))
874  abort ();
875  return nptr;
876 }
877 
878 static inline void *xcalloc (size_t n, size_t size)
879 {
880  void *ptr = calloc (n, size);
881  if (unlikely (ptr == NULL))
882  abort ();
883  return ptr;
884 }
885 
886 static inline char *xstrdup (const char *str)
887 {
888  char *ptr = strdup (str);
889  if (unlikely(ptr == NULL))
890  abort ();
891  return ptr;
892 }
893 
894 /*****************************************************************************
895  * libvlc features
896  *****************************************************************************/
897 VLC_API const char * VLC_CompileBy( void ) VLC_USED;
898 VLC_API const char * VLC_CompileHost( void ) VLC_USED;
899 VLC_API const char * VLC_Compiler( void ) VLC_USED;
900 
901 /*****************************************************************************
902  * Additional vlc stuff
903  *****************************************************************************/
904 #include "vlc_messages.h"
905 #include "vlc_objects.h"
906 #include "vlc_variables.h"
907 #include "vlc_main.h"
908 #include "vlc_configuration.h"
909 
910 #if defined( _WIN32 ) || defined( __SYMBIAN32__ ) || defined( __OS2__ )
911 # define DIR_SEP_CHAR '\\'
912 # define DIR_SEP "\\"
913 # define PATH_SEP_CHAR ';'
914 # define PATH_SEP ";"
915 #else
916 # define DIR_SEP_CHAR '/'
917 # define DIR_SEP "/"
918 # define PATH_SEP_CHAR ':'
919 # define PATH_SEP ":"
920 #endif
921 
922 #define LICENSE_MSG \
923  _("This program comes with NO WARRANTY, to the extent permitted by " \
924  "law.\nYou may redistribute it under the terms of the GNU General " \
925  "Public License;\nsee the file named COPYING for details.\n" \
926  "Written by the VideoLAN team; see the AUTHORS file.\n")
927 
928 #endif /* !VLC_COMMON_H */
Definition: vlc_input.h:152
Definition: vlc_picture.h:69
Definition: vlc_vlm.h:173
Definition: vlc_demux.h:41
Definition: vlc_input_item.h:55
Definition: vlc_subpicture.h:57
Definition: vlc_configuration.h:41
Definition: vlc_input_item.h:109
Definition: vlc_configuration.h:60
Definition: vlc_common.h:213
Definition: vlc_subpicture.h:136
Definition: vlc_common.h:211
Definition: vlc_main.h:38
Definition: vlc_services_discovery.h:47
Definition: vlc_sout.h:146
Definition: vlc_image.h:38
Definition: vlc_common.h:345
Definition: vlc_md5.h:32
Definition: vlc_mtime.h:63
Definition: vlc_es.h:67
Definition: vlc_network.h:140
Definition: vlc_es.h:39
Definition: vlc_input.h:45
Definition: vlc_configuration.h:156
Definition: vlc_es_out.h:96
Definition: vlc_sout.h:64
Definition: vlc_url.h:35
Definition: vlc_playlist.h:133
Definition: vlc_es.h:279
Definition: vlc_es.h:323
Definition: vlc_common.h:210
Definition: vlc_vout.h:73
Definition: vlc_input_item.h:48
Definition: vlc_es.h:180
Definition: vlc_common.h:215
Definition: vlc_access.h:74
Definition: vlc_sout.h:176
Definition: vlc_input_item.h:42
Definition: vlc_aout.h:101
Definition: vlc_input.h:227
Definition: vlc_stream.h:52
Definition: vlc_sout.h:104
Definition: vlc_spu.h:54
Definition: vlc_codec.h:52
int64_t mtime_t
Definition: vlc_common.h:153
Definition: vlc_filter.h:45
uint32_t vlc_fourcc_t
Definition: vlc_common.h:160
Definition: vlc_playlist.h:187
Definition: vlc_xml.h:36
Definition: vlc_sout.h:45
Definition: vlc_block.h:102
Definition: vlc_xml.h:65
Definition: vlc_input_item.h:283
Definition: vlc_common.h:362
Definition: vlc_common.h:214
Definition: vlc_objects.h:42
Definition: vlc_codec.h:150
Definition: vlc_playlist.h:162
playlist_command_t
Definition: vlc_common.h:209