/*
  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
  *

  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or

  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either

  * version 2.1 of the License, or (at your option) any later version.

  *

  * FFmpeg is distributed in the hope that it will be useful,

  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public

  * License along with FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 /**

  * @file

  * common internal API header

  */
 

 #ifndef AVUTIL_INTERNAL_H
 #define AVUTIL_INTERNAL_H

 #if !defined(DEBUG) && !defined(NDEBUG)
 #    define NDEBUG
 #endif
 

 #include <limits.h>

 #include <stdint.h>

 #include <stddef.h>
 #include <assert.h>

 #include "config.h"

 #include "attributes.h"

 #include "timer.h"

 #include "cpu.h"

 #include "dict.h"
 
 struct AVDictionary {
     int count;
     AVDictionaryEntry *elems;
 };

 #ifndef attribute_align_arg

 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)

 #    define attribute_align_arg __attribute__((force_align_arg_pointer))
 #else
 #    define attribute_align_arg
 #endif
 #endif
 

 #ifndef INT16_MIN

 #define INT16_MIN       (-0x7fff - 1)

 #endif
 
 #ifndef INT16_MAX
 #define INT16_MAX       0x7fff
 #endif
 
 #ifndef INT32_MIN

 #define INT32_MIN       (-0x7fffffff - 1)

 #endif
 
 #ifndef INT32_MAX
 #define INT32_MAX       0x7fffffff
 #endif
 
 #ifndef UINT32_MAX
 #define UINT32_MAX      0xffffffff
 #endif
 
 #ifndef INT64_MIN

 #define INT64_MIN       (-0x7fffffffffffffffLL - 1)

 #endif
 
 #ifndef INT64_MAX

 #define INT64_MAX INT64_C(9223372036854775807)

 #endif
 
 #ifndef UINT64_MAX

 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)

 #endif
 
 #ifndef INT_BIT

 #    define INT_BIT (CHAR_BIT * sizeof(int))

 #endif
 

 #ifndef offsetof

 #    define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))

 #endif
 

 /* Use to export labels from asm. */
 #define LABEL_MANGLE(a) EXTERN_PREFIX #a
 

 // Use rip-relative addressing if compiling PIC code on x86-64.

 #if ARCH_X86_64 && defined(PIC)

 #    define LOCAL_MANGLE(a) #a "(%%rip)"

 #else

 #    define LOCAL_MANGLE(a) #a

 #endif

 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
 

 /* debug stuff */
 

 #define av_abort()      do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)

 /* math */
 

 #if ARCH_X86

 #define MASK_ABS(mask, level)\

             __asm__ volatile(\

                 "cltd                   \n\t"\

                 "xorl %1, %0            \n\t"\
                 "subl %1, %0            \n\t"\
                 : "+a" (level), "=&d" (mask)\
             );
 #else
 #define MASK_ABS(mask, level)\

             mask  = level >> 31;\
             level = (level ^ mask) - mask;

 #endif
 

 /* avoid usage of dangerous/inappropriate system functions */

 #undef  malloc

 #define malloc please_use_av_malloc

 #undef  free

 #define free please_use_av_free

 #undef  realloc

 #define realloc please_use_av_realloc

 #undef  time

 #define time time_is_forbidden_due_to_security_issues

 #undef  rand

 #define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get

 #undef  srand

 #define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init

 #undef  random

 #define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get

 #undef  sprintf

 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf

 #undef  strcat

 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat

 #undef  strncpy
 #define strncpy strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy

 #undef  exit

 #define exit exit_is_forbidden

 #undef  printf

 #define printf please_use_av_log_instead_of_printf

 #undef  fprintf

 #define fprintf please_use_av_log_instead_of_fprintf

 #undef  puts

 #define puts please_use_av_log_instead_of_puts

 #undef  perror
 #define perror please_use_av_log_instead_of_perror

 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\

 {\

     p = av_malloc(size);\
     if (p == NULL && (size) != 0) {\

         av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
         goto label;\

     }\
 }
 

 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\

 {\

     p = av_mallocz(size);\
     if (p == NULL && (size) != 0) {\

         av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
         goto label;\

     }\
 }
 

 #include "libm.h"

 /**

  * Return NULL if CONFIG_SMALL is true, otherwise the argument

  * without modification. Used to disable the definition of strings

  * (for example AVCodec long_names).
  */
 #if CONFIG_SMALL
 #   define NULL_IF_CONFIG_SMALL(x) NULL
 #else
 #   define NULL_IF_CONFIG_SMALL(x) x
 #endif
 

 /**

  * Define a function with only the non-default version specified.
  *
  * On systems with ELF shared libraries, all symbols exported from
  * FFmpeg libraries are tagged with the name and major version of the
  * library to which they belong.  If a function is moved from one
  * library to another, a wrapper must be retained in the original
  * location to preserve binary compatibility.
  *
  * Functions defined with this macro will never be used to resolve
  * symbols by the build-time linker.
  *
  * @param type return type of function
  * @param name name of function
  * @param args argument list of function
  * @param ver  version tag to assign function

  */

 #if HAVE_SYMVER_ASM_LABEL

 #   define FF_SYMVER(type, name, args, ver)                     \
     type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver);  \

     type ff_##name args
 #elif HAVE_SYMVER_GNU_ASM

 #   define FF_SYMVER(type, name, args, ver)                             \
     __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver);      \
     type ff_##name args;                                                \

     type ff_##name args
 #endif
 

 /**
  * Returns NULL if a threading library has not been enabled.
  * Used to disable threading functions in AVCodec definitions
  * when not needed.
  */
 #if HAVE_THREADS
 #   define ONLY_IF_THREADS_ENABLED(x) x
 #else
 #   define ONLY_IF_THREADS_ENABLED(x) NULL
 #endif
 

 #if HAVE_MMX
 /**
  * Empty mmx state.
  * this must be called between any dsp function and float/double code.
  * for example sin(); dsp->idct_put(); emms_c(); cos()
  */
 static av_always_inline void emms_c(void)
 {

     if(av_get_cpu_flags() & AV_CPU_FLAG_MMX)
         __asm__ volatile ("emms" ::: "memory");

 }
 #else /* HAVE_MMX */
 #define emms_c()
 #endif /* HAVE_MMX */
 

 #endif /* AVUTIL_INTERNAL_H */