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 libavutil/internal.h 23 * common internal API header 24 */ 25 26#ifndef AVUTIL_INTERNAL_H 27#define AVUTIL_INTERNAL_H 28 29#if !defined(DEBUG) && !defined(NDEBUG) 30# define NDEBUG 31#endif 32 33#include <limits.h> 34#include <stdint.h> 35#include <stddef.h> 36#include <assert.h> 37#include "config.h" 38#include "common.h" 39#include "mem.h" 40#include "timer.h" 41 42#ifndef attribute_align_arg 43#if (!defined(__ICC) || __ICC > 1100) && AV_GCC_VERSION_AT_LEAST(4,2) 44# define attribute_align_arg __attribute__((force_align_arg_pointer)) 45#else 46# define attribute_align_arg 47#endif 48#endif 49 50#ifndef attribute_used 51#if AV_GCC_VERSION_AT_LEAST(3,1) 52# define attribute_used __attribute__((used)) 53#else 54# define attribute_used 55#endif 56#endif 57 58#ifndef INT16_MIN 59#define INT16_MIN (-0x7fff-1) 60#endif 61 62#ifndef INT16_MAX 63#define INT16_MAX 0x7fff 64#endif 65 66#ifndef INT32_MIN 67#define INT32_MIN (-0x7fffffff-1) 68#endif 69 70#ifndef INT32_MAX 71#define INT32_MAX 0x7fffffff 72#endif 73 74#ifndef UINT32_MAX 75#define UINT32_MAX 0xffffffff 76#endif 77 78#ifndef INT64_MIN 79#define INT64_MIN (-0x7fffffffffffffffLL-1) 80#endif 81 82#ifndef INT64_MAX 83#define INT64_MAX INT64_C(9223372036854775807) 84#endif 85 86#ifndef UINT64_MAX 87#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF) 88#endif 89 90#ifndef INT_BIT 91# define INT_BIT (CHAR_BIT * sizeof(int)) 92#endif 93 94#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC) 95# define PIC 96#endif 97 98#ifndef offsetof 99# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F)) 100#endif 101 102// Use rip-relative addressing if compiling PIC code on x86-64. 103#if ARCH_X86_64 && defined(PIC) 104# define LOCAL_MANGLE(a) #a "(%%rip)" 105#else 106# define LOCAL_MANGLE(a) #a 107#endif 108 109#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) 110 111/* debug stuff */ 112 113/* dprintf macros */ 114#ifdef DEBUG 115# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__) 116#else 117# define dprintf(pctx, ...) 118#endif 119 120#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) 121 122/* math */ 123 124extern const uint32_t ff_inverse[256]; 125 126#if ARCH_X86 127# define FASTDIV(a,b) \ 128 ({\ 129 int ret,dmy;\ 130 __asm__ volatile(\ 131 "mull %3"\ 132 :"=d"(ret),"=a"(dmy)\ 133 :"1"(a),"g"(ff_inverse[b])\ 134 );\ 135 ret;\ 136 }) 137#elif HAVE_ARMV6 138static inline av_const int FASTDIV(int a, int b) 139{ 140 int r, t; 141 __asm__ volatile("cmp %3, #2 \n\t" 142 "ldr %1, [%4, %3, lsl #2] \n\t" 143 "lsrle %0, %2, #1 \n\t" 144 "smmulgt %0, %1, %2 \n\t" 145 : "=&r"(r), "=&r"(t) : "r"(a), "r"(b), "r"(ff_inverse)); 146 return r; 147} 148#elif ARCH_ARM 149static inline av_const int FASTDIV(int a, int b) 150{ 151 int r, t; 152 __asm__ volatile ("umull %1, %0, %2, %3" 153 : "=&r"(r), "=&r"(t) : "r"(a), "r"(ff_inverse[b])); 154 return r; 155} 156#elif CONFIG_FASTDIV 157# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32)) 158#else 159# define FASTDIV(a,b) ((a)/(b)) 160#endif 161 162extern const uint8_t ff_sqrt_tab[256]; 163 164static inline av_const unsigned int ff_sqrt(unsigned int a) 165{ 166 unsigned int b; 167 168 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4; 169 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2; 170#if !CONFIG_SMALL 171 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1; 172 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ; 173#endif 174 else{ 175 int s= av_log2_16bit(a>>16)>>1; 176 unsigned int c= a>>(s+2); 177 b= ff_sqrt_tab[c>>(s+8)]; 178 b= FASTDIV(c,b) + (b<<s); 179 } 180 181 return b - (a<b*b); 182} 183 184#if ARCH_X86 185#define MASK_ABS(mask, level)\ 186 __asm__ volatile(\ 187 "cltd \n\t"\ 188 "xorl %1, %0 \n\t"\ 189 "subl %1, %0 \n\t"\ 190 : "+a" (level), "=&d" (mask)\ 191 ); 192#else 193#define MASK_ABS(mask, level)\ 194 mask= level>>31;\ 195 level= (level^mask)-mask; 196#endif 197 198#if HAVE_CMOV 199#define COPY3_IF_LT(x,y,a,b,c,d)\ 200__asm__ volatile (\ 201 "cmpl %0, %3 \n\t"\ 202 "cmovl %3, %0 \n\t"\ 203 "cmovl %4, %1 \n\t"\ 204 "cmovl %5, %2 \n\t"\ 205 : "+&r" (x), "+&r" (a), "+r" (c)\ 206 : "r" (y), "r" (b), "r" (d)\ 207); 208#else 209#define COPY3_IF_LT(x,y,a,b,c,d)\ 210if((y)<(x)){\ 211 (x)=(y);\ 212 (a)=(b);\ 213 (c)=(d);\ 214} 215#endif 216 217/* avoid usage of dangerous/inappropriate system functions */ 218#undef malloc 219#define malloc please_use_av_malloc 220#undef free 221#define free please_use_av_free 222#undef realloc 223#define realloc please_use_av_realloc 224#undef time 225#define time time_is_forbidden_due_to_security_issues 226#undef rand 227#define rand rand_is_forbidden_due_to_state_trashing_use_av_random 228#undef srand 229#define srand srand_is_forbidden_due_to_state_trashing_use_av_random_init 230#undef random 231#define random random_is_forbidden_due_to_state_trashing_use_av_random 232#undef sprintf 233#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf 234#undef strcat 235#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat 236#undef exit 237#define exit exit_is_forbidden 238#ifndef LIBAVFORMAT_BUILD 239#undef printf 240#define printf please_use_av_log_instead_of_printf 241#undef fprintf 242#define fprintf please_use_av_log_instead_of_fprintf 243#undef puts 244#define puts please_use_av_log_instead_of_puts 245#undef perror 246#define perror please_use_av_log_instead_of_perror 247#endif 248 249#define CHECKED_ALLOCZ(p, size)\ 250{\ 251 p= av_mallocz(size);\ 252 if(p==NULL && (size)!=0){\ 253 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\ 254 goto fail;\ 255 }\ 256} 257 258#if defined(__ICC) || defined(__SUNPRO_C) 259 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n))) 260 #define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v 261#elif defined(__GNUC__) 262 #define DECLARE_ALIGNED(n,t,v) t v __attribute__ ((aligned (n))) 263 #define DECLARE_ASM_CONST(n,t,v) static const t v attribute_used __attribute__ ((aligned (n))) 264#elif defined(_MSC_VER) 265 #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v 266 #define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v 267#elif HAVE_INLINE_ASM 268 #error The asm code needs alignment, but we do not know how to do it for this compiler. 269#else 270 #define DECLARE_ALIGNED(n,t,v) t v 271 #define DECLARE_ASM_CONST(n,t,v) static const t v 272#endif 273 274 275#if !HAVE_LLRINT 276static av_always_inline av_const long long llrint(double x) 277{ 278 return rint(x); 279} 280#endif /* HAVE_LLRINT */ 281 282#if !HAVE_LRINT 283static av_always_inline av_const long int lrint(double x) 284{ 285 return rint(x); 286} 287#endif /* HAVE_LRINT */ 288 289#if !HAVE_LRINTF 290static av_always_inline av_const long int lrintf(float x) 291{ 292 return (int)(rint(x)); 293} 294#endif /* HAVE_LRINTF */ 295 296#if !HAVE_ROUND 297static av_always_inline av_const double round(double x) 298{ 299 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); 300} 301#endif /* HAVE_ROUND */ 302 303#if !HAVE_ROUNDF 304static av_always_inline av_const float roundf(float x) 305{ 306 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5); 307} 308#endif /* HAVE_ROUNDF */ 309 310#if !HAVE_TRUNCF 311static av_always_inline av_const float truncf(float x) 312{ 313 return (x > 0) ? floor(x) : ceil(x); 314} 315#endif /* HAVE_TRUNCF */ 316 317/** 318 * Returns NULL if CONFIG_SMALL is true, otherwise the argument 319 * without modification. Used to disable the definition of strings 320 * (for example AVCodec long_names). 321 */ 322#if CONFIG_SMALL 323# define NULL_IF_CONFIG_SMALL(x) NULL 324#else 325# define NULL_IF_CONFIG_SMALL(x) x 326#endif 327 328#endif /* AVUTIL_INTERNAL_H */ 329