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 FFMPEG_INTERNAL_H
  27 #define FFMPEG_INTERNAL_H
  28
  29 #if !defined(DEBUG) && !defined(NDEBUG)
  30 #    define NDEBUG
  31 #endif
  32
  33 #include <stdint.h>
  34 #include <stddef.h>
  35 #include <assert.h>
  36
  37 #ifndef attribute_align_arg
  38 #if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__>1)
  39 #    define attribute_align_arg __attribute__((force_align_arg_pointer))
  40 #else
  41 #    define attribute_align_arg
  42 #endif
  43 #endif
  44
  45 #ifndef attribute_used
  46 #if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
  47 #    define attribute_used __attribute__((used))
  48 #else
  49 #    define attribute_used
  50 #endif
  51 #endif
  52
  53 #ifdef HAVE_ALTIVEC_VECTOR_BRACES
  54 #define AVV(x...) {x}
  55 #else
  56 #define AVV(x...) (x)
  57 #endif
  58
  59 #ifndef M_PI
  60 #define M_PI    3.14159265358979323846
  61 #endif
  62
  63 #ifndef INT16_MIN
  64 #define INT16_MIN       (-0x7fff-1)
  65 #endif
  66
  67 #ifndef INT16_MAX
  68 #define INT16_MAX       0x7fff
  69 #endif
  70
  71 #ifndef INT32_MIN
  72 #define INT32_MIN       (-0x7fffffff-1)
  73 #endif
  74
  75 #ifndef INT32_MAX
  76 #define INT32_MAX       0x7fffffff
  77 #endif
  78
  79 #ifndef UINT32_MAX
  80 #define UINT32_MAX      0xffffffff
  81 #endif
  82
  83 #ifndef INT64_MIN
  84 #define INT64_MIN       (-0x7fffffffffffffffLL-1)
  85 #endif
  86
  87 #ifndef INT64_MAX
  88 #define INT64_MAX INT64_C(9223372036854775807)
  89 #endif
  90
  91 #ifndef UINT64_MAX
  92 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
  93 #endif
  94
  95 #ifndef INT_BIT
  96 #    if INT_MAX != 2147483647
  97 #        define INT_BIT 64
  98 #    else
  99 #        define INT_BIT 32
 100 #    endif
 101 #endif
 102
 103 #if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
 104 #    define PIC
 105 #endif
 106
 107 #include "config.h"
 108 #include "intreadwrite.h"
 109 #include "bswap.h"
 110
 111 #ifndef offsetof
 112 #    define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
 113 #endif
 114
 115 #ifdef USE_FASTMEMCPY
 116 #    include "libvo/fastmemcpy.h"
 117 #    define memcpy(a,b,c) fast_memcpy(a,b,c)
 118 #endif
 119
 120 // Use rip-relative addressing if compiling PIC code on x86-64.
 121 #if defined(ARCH_X86_64) && defined(PIC)
 122 #    define LOCAL_MANGLE(a) #a "(%%rip)"
 123 #else
 124 #    define LOCAL_MANGLE(a) #a
 125 #endif
 126
 127 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
 128
 129 /* debug stuff */
 130
 131 /* dprintf macros */
 132 #ifdef DEBUG
 133 #    define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
 134 #else
 135 #    define dprintf(pctx, ...)
 136 #endif
 137
 138 #define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
 139
 140 /* math */
 141
 142 extern const uint32_t ff_inverse[256];
 143
 144 #if defined(ARCH_X86)
 145 #    define FASTDIV(a,b) \
 146     ({\
 147         int ret,dmy;\
 148         asm volatile(\
 149             "mull %3"\
 150             :"=d"(ret),"=a"(dmy)\
 151             :"1"(a),"g"(ff_inverse[b])\
 152             );\
 153         ret;\
 154     })
 155 #elif defined(ARCH_ARMV4L)
 156 #    define FASTDIV(a,b) \
 157     ({\
 158         int ret,dmy;\
 159         asm volatile(\
 160             "umull %1, %0, %2, %3"\
 161             :"=&r"(ret),"=&r"(dmy)\
 162             :"r"(a),"r"(ff_inverse[b])\
 163             );\
 164         ret;\
 165     })
 166 #elif defined(CONFIG_FASTDIV)
 167 #    define FASTDIV(a,b)   ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
 168 #else
 169 #    define FASTDIV(a,b)   ((a)/(b))
 170 #endif
 171
 172 extern const uint8_t ff_sqrt_tab[256];
 173
 174 static inline int av_log2_16bit(unsigned int v);
 175
 176 static inline av_const unsigned int ff_sqrt(unsigned int a)
 177 {
 178     unsigned int b;
 179
 180     if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
 181     else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
 182 #ifndef CONFIG_SMALL
 183     else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
 184     else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ]   ;
 185 #endif
 186     else{
 187         int s= av_log2_16bit(a>>16)>>1;
 188         unsigned int c= a>>(s+2);
 189         b= ff_sqrt_tab[c>>(s+8)];
 190         b= FASTDIV(c,b) + (b<<s);
 191     }
 192
 193     return b - (a<b*b);
 194 }
 195
 196 #if defined(ARCH_X86)
 197 #define MASK_ABS(mask, level)\
 198             asm volatile(\
 199                 "cltd                   \n\t"\
 200                 "xorl %1, %0            \n\t"\
 201                 "subl %1, %0            \n\t"\
 202                 : "+a" (level), "=&d" (mask)\
 203             );
 204 #else
 205 #define MASK_ABS(mask, level)\
 206             mask= level>>31;\
 207             level= (level^mask)-mask;
 208 #endif
 209
 210 #ifdef HAVE_CMOV
 211 #define COPY3_IF_LT(x,y,a,b,c,d)\
 212 asm volatile (\
 213     "cmpl %0, %3        \n\t"\
 214     "cmovl %3, %0       \n\t"\
 215     "cmovl %4, %1       \n\t"\
 216     "cmovl %5, %2       \n\t"\
 217     : "+&r" (x), "+&r" (a), "+r" (c)\
 218     : "r" (y), "r" (b), "r" (d)\
 219 );
 220 #else
 221 #define COPY3_IF_LT(x,y,a,b,c,d)\
 222 if((y)<(x)){\
 223      (x)=(y);\
 224      (a)=(b);\
 225      (c)=(d);\
 226 }
 227 #endif
 228
 229 /* avoid usage of various functions */
 230 #undef  malloc
 231 #define malloc please_use_av_malloc
 232 #undef  free
 233 #define free please_use_av_free
 234 #undef  realloc
 235 #define realloc please_use_av_realloc
 236 #undef  time
 237 #define time time_is_forbidden_due_to_security_issues
 238 #undef  rand
 239 #define rand rand_is_forbidden_due_to_state_trashing_use_av_random
 240 #undef  srand
 241 #define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
 242 #undef  random
 243 #define random random_is_forbidden_due_to_state_trashing_use_av_random
 244 #undef  sprintf
 245 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
 246 #undef  strcat
 247 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
 248 #undef  exit
 249 #define exit exit_is_forbidden
 250 #if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
 251 #undef  printf
 252 #define printf please_use_av_log
 253 #undef  fprintf
 254 #define fprintf please_use_av_log
 255 #undef  puts
 256 #define puts please_use_av_log
 257 #undef  perror
 258 #define perror please_use_av_log_instead_of_perror
 259 #endif
 260
 261 #define CHECKED_ALLOCZ(p, size)\
 262 {\
 263     p= av_mallocz(size);\
 264     if(p==NULL && (size)!=0){\
 265         av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
 266         goto fail;\
 267     }\
 268 }
 269
 270 #ifndef HAVE_LLRINT
 271 static av_always_inline av_const long long llrint(double x)
 272 {
 273     return rint(x);
 274 }
 275 #endif /* HAVE_LLRINT */
 276
 277 #ifndef HAVE_LRINT
 278 static av_always_inline av_const long int lrint(double x)
 279 {
 280     return rint(x);
 281 }
 282 #endif /* HAVE_LRINT */
 283
 284 #ifndef HAVE_LRINTF
 285 static av_always_inline av_const long int lrintf(float x)
 286 {
 287     return (int)(rint(x));
 288 }
 289 #endif /* HAVE_LRINTF */
 290
 291 #ifndef HAVE_ROUND
 292 static av_always_inline av_const double round(double x)
 293 {
 294     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
 295 }
 296 #endif /* HAVE_ROUND */
 297
 298 #ifndef HAVE_ROUNDF
 299 static av_always_inline av_const float roundf(float x)
 300 {
 301     return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
 302 }
 303 #endif /* HAVE_ROUNDF */
 304
 305 #endif /* FFMPEG_INTERNAL_H */