libavutil/internal.h

   1 /*
   2  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 /**
  22  * @file internal.h
  23  * common internal api header.
  24  */
  25
  26 #ifndef INTERNAL_H
  27 #define INTERNAL_H
  28
  29 #ifndef attribute_used
  30 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
  31 #    define attribute_used __attribute__((used))
  32 #else
  33 #    define attribute_used
  34 #endif
  35 #endif
  36
  37 #ifndef attribute_unused
  38 #if defined(__GNUC__)
  39 #    define attribute_unused __attribute__((unused))
  40 #else
  41 #    define attribute_unused
  42 #endif
  43 #endif
  44
  45 #ifndef M_PI
  46 #define M_PI    3.14159265358979323846
  47 #endif
  48
  49 #ifndef PRId64
  50 #define PRId64 "lld"
  51 #endif
  52
  53 #ifndef PRIu64
  54 #define PRIu64 "llu"
  55 #endif
  56
  57 #ifndef PRIx64
  58 #define PRIx64 "llx"
  59 #endif
  60
  61 #ifndef PRIX64
  62 #define PRIX64 "llX"
  63 #endif
  64
  65 #ifndef PRId32
  66 #define PRId32 "d"
  67 #endif
  68
  69 #ifndef PRIdFAST16
  70 #define PRIdFAST16 PRId32
  71 #endif
  72
  73 #ifndef PRIdFAST32
  74 #define PRIdFAST32 PRId32
  75 #endif
  76
  77 #ifndef INT16_MIN
  78 #define INT16_MIN       (-0x7fff-1)
  79 #endif
  80
  81 #ifndef INT16_MAX
  82 #define INT16_MAX       0x7fff
  83 #endif
  84
  85 #ifndef INT32_MIN
  86 #define INT32_MIN       (-0x7fffffff-1)
  87 #endif
  88
  89 #ifndef INT32_MAX
  90 #define INT32_MAX       0x7fffffff
  91 #endif
  92
  93 #ifndef UINT32_MAX
  94 #define UINT32_MAX      0xffffffff
  95 #endif
  96
  97 #ifndef INT64_MIN
  98 #define INT64_MIN       (-0x7fffffffffffffffLL-1)
  99 #endif
 100
 101 #ifndef INT64_MAX
 102 #define INT64_MAX INT64_C(9223372036854775807)
 103 #endif
 104
 105 #ifndef UINT64_MAX
 106 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
 107 #endif
 108
 109 #ifndef INT_BIT
 110 #    if INT_MAX != 2147483647
 111 #        define INT_BIT 64
 112 #    else
 113 #        define INT_BIT 32
 114 #    endif
 115 #endif
 116
 117 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
 118 #    define PIC
 119 #endif
 120
 121 #include "intreadwrite.h"
 122 #include "bswap.h"
 123
 124 #include <stddef.h>
 125 #ifndef offsetof
 126 #    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
 127 #endif
 128
 129 #ifdef __MINGW32__
 130 #    ifdef _DEBUG
 131 #        define DEBUG
 132 #    endif
 133
 134 #    define snprintf _snprintf
 135 #    define vsnprintf _vsnprintf
 136
 137 #    ifdef CONFIG_WINCE
 138 #        define perror(a)
 139 #        define abort()
 140 #    endif
 141
 142 /* __MINGW32__ end */
 143 #elif defined (CONFIG_OS2)
 144 /* OS/2 EMX */
 145
 146 #    include <float.h>
 147
 148 #endif /* !__MINGW32__ && CONFIG_OS2 */
 149
 150 #ifdef USE_FASTMEMCPY
 151 #    include "libvo/fastmemcpy.h"
 152 #endif
 153
 154 // Use rip-relative addressing if compiling PIC code on x86-64.
 155 #if defined(__MINGW32__) || defined(__CYGWIN__) || \
 156     defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
 157 #    if defined(ARCH_X86_64) && defined(PIC)
 158 #        define MANGLE(a) "_" #a"(%%rip)"
 159 #    else
 160 #        define MANGLE(a) "_" #a
 161 #    endif
 162 #else
 163 #    if defined(ARCH_X86_64) && defined(PIC)
 164 #        define MANGLE(a) #a"(%%rip)"
 165 #    elif defined(CONFIG_DARWIN)
 166 #        define MANGLE(a) "_" #a
 167 #    else
 168 #        define MANGLE(a) #a
 169 #    endif
 170 #endif
 171
 172 /* debug stuff */
 173
 174 #if !defined(DEBUG) && !defined(NDEBUG)
 175 #    define NDEBUG
 176 #endif
 177 #include <assert.h>
 178
 179 /* dprintf macros */
 180 #ifdef DEBUG
 181 #    define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
 182 #else
 183 #    define dprintf(fmt,...)
 184 #endif
 185
 186 #define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
 187
 188 /* math */
 189
 190 extern const uint32_t ff_inverse[256];
 191
 192 #if defined(ARCH_X86)
 193 #    define FASTDIV(a,b) \
 194     ({\
 195         int ret,dmy;\
 196         asm volatile(\
 197             "mull %3"\
 198             :"=d"(ret),"=a"(dmy)\
 199             :"1"(a),"g"(ff_inverse[b])\
 200             );\
 201         ret;\
 202     })
 203 #elif defined(ARCH_ARMV4L)
 204 #    define FASTDIV(a,b) \
 205     ({\
 206         int ret,dmy;\
 207         asm volatile(\
 208             "umull %1, %0, %2, %3"\
 209             :"=&r"(ret),"=&r"(dmy)\
 210             :"r"(a),"r"(ff_inverse[b])\
 211             );\
 212         ret;\
 213     })
 214 #elif defined(CONFIG_FASTDIV)
 215 #    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
 216 #else
 217 #    define FASTDIV(a,b)   ((a)/(b))
 218 #endif
 219
 220 extern const uint8_t ff_sqrt_tab[128];
 221
 222 static inline int ff_sqrt(int a)
 223 {
 224     int ret=0;
 225     int s;
 226     int ret_sq=0;
 227
 228     if(a<128) return ff_sqrt_tab[a];
 229
 230     for(s=15; s>=0; s--){
 231         int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
 232         if(b<=a){
 233             ret_sq=b;
 234             ret+= 1<<s;
 235         }
 236     }
 237     return ret;
 238 }
 239
 240 #if defined(ARCH_X86)
 241 #define MASK_ABS(mask, level)\
 242             asm volatile(\
 243                 "cdq                    \n\t"\
 244                 "xorl %1, %0            \n\t"\
 245                 "subl %1, %0            \n\t"\
 246                 : "+a" (level), "=&d" (mask)\
 247             );
 248 #else
 249 #define MASK_ABS(mask, level)\
 250             mask= level>>31;\
 251             level= (level^mask)-mask;
 252 #endif
 253
 254 #ifdef HAVE_CMOV
 255 #define COPY3_IF_LT(x,y,a,b,c,d)\
 256 asm volatile (\
 257     "cmpl %0, %3        \n\t"\
 258     "cmovl %3, %0       \n\t"\
 259     "cmovl %4, %1       \n\t"\
 260     "cmovl %5, %2       \n\t"\
 261     : "+r" (x), "+r" (a), "+r" (c)\
 262     : "r" (y), "r" (b), "r" (d)\
 263 );
 264 #else
 265 #define COPY3_IF_LT(x,y,a,b,c,d)\
 266 if((y)<(x)){\
 267      (x)=(y);\
 268      (a)=(b);\
 269      (c)=(d);\
 270 }
 271 #endif
 272
 273 /* avoid usage of various functions */
 274 #define malloc please_use_av_malloc
 275 #define free please_use_av_free
 276 #define realloc please_use_av_realloc
 277 #define time time_is_forbidden_due_to_security_issues
 278 #define rand rand_is_forbidden_due_to_state_trashing
 279 #define srand srand_is_forbidden_due_to_state_trashing
 280 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
 281 #define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
 282 #if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
 283 #define printf please_use_av_log
 284 #define fprintf please_use_av_log
 285 #endif
 286
 287 #define CHECKED_ALLOCZ(p, size)\
 288 {\
 289     p= av_mallocz(size);\
 290     if(p==NULL && (size)!=0){\
 291         perror("malloc");\
 292         goto fail;\
 293     }\
 294 }
 295
 296 #ifndef HAVE_LRINTF
 297 /* XXX: add ISOC specific test to avoid specific BSD testing. */
 298 /* better than nothing implementation. */
 299 /* btw, rintf() is existing on fbsd too -- alex */
 300 static av_always_inline long int lrintf(float x)
 301 {
 302 #ifdef __MINGW32__
 303 #  ifdef ARCH_X86_32
 304     int32_t i;
 305     asm volatile(
 306         "fistpl %0\n\t"
 307         : "=m" (i) : "t" (x) : "st"
 308     );
 309     return i;
 310 #  else
 311     /* XXX: incorrect, but make it compile */
 312     return (int)(x + (x < 0 ? -0.5 : 0.5));
 313 #  endif /* ARCH_X86_32 */
 314 #else
 315     return (int)(rint(x));
 316 #endif /* __MINGW32__ */
 317 }
 318 #endif /* HAVE_LRINTF */
 319
 320 #endif /* INTERNAL_H */