mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
820818a330
With unknown attribute warnings disabled, these checks are no longer needed. Removing them improves readability while having no effect on generated code. Signed-off-by: Mans Rullgard <mans@mansr.com>
225 lines
5.9 KiB
C
225 lines
5.9 KiB
C
/*
|
|
* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; 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"
|
|
|
|
#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 exit
|
|
#define exit exit_is_forbidden
|
|
#ifndef LIBAVFORMAT_BUILD
|
|
#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
|
|
#endif
|
|
|
|
#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
|
|
* Libav 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
|
|
|
|
#endif /* AVUTIL_INTERNAL_H */
|