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https://git.ffmpeg.org/ffmpeg.git
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335ee1aadd
ffmpeg.c uses lrintf(), which is missing on some systems. Previously it picked up the replacement via libavutil/internal.h due to HAVE_AV_CONFIG_H being erroneously defined. Moving these replacements to a separate header enables ffmpeg.c to use them without being exposed to internal interfaces. This use of a non-public header is justified by the header in question not being part of the internal interface either. It should rather be considered as part of the build system, which is shared between the libraries and the applications. This header cannot be installed since the tested conditions depend on the compiler. Originally committed as revision 22399 to svn://svn.ffmpeg.org/ffmpeg/trunk
209 lines
5.1 KiB
C
209 lines
5.1 KiB
C
/*
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file libavutil/internal.h
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* common internal API header
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*/
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#ifndef AVUTIL_INTERNAL_H
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#define AVUTIL_INTERNAL_H
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#if !defined(DEBUG) && !defined(NDEBUG)
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# define NDEBUG
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#endif
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#include <limits.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <assert.h>
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#include "config.h"
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#include "common.h"
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#include "mem.h"
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#include "timer.h"
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#ifndef attribute_align_arg
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#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
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# define attribute_align_arg __attribute__((force_align_arg_pointer))
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#else
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# define attribute_align_arg
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#endif
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#endif
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#ifndef attribute_used
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#if AV_GCC_VERSION_AT_LEAST(3,1)
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# define attribute_used __attribute__((used))
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#else
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# define attribute_used
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#endif
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#endif
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#ifndef av_alias
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#if HAVE_ATTRIBUTE_MAY_ALIAS && (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(3,3)
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# define av_alias __attribute__((may_alias))
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#else
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# define av_alias
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#endif
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#endif
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#ifndef INT16_MIN
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#define INT16_MIN (-0x7fff - 1)
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#endif
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#ifndef INT16_MAX
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#define INT16_MAX 0x7fff
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#endif
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#ifndef INT32_MIN
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#define INT32_MIN (-0x7fffffff - 1)
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#endif
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#ifndef INT32_MAX
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#define INT32_MAX 0x7fffffff
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#endif
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#ifndef UINT32_MAX
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#define UINT32_MAX 0xffffffff
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#endif
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#ifndef INT64_MIN
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#define INT64_MIN (-0x7fffffffffffffffLL - 1)
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#endif
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#ifndef INT64_MAX
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#define INT64_MAX INT64_C(9223372036854775807)
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#endif
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#ifndef UINT64_MAX
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#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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#endif
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#ifndef INT_BIT
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# define INT_BIT (CHAR_BIT * sizeof(int))
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#endif
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#ifndef offsetof
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# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
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#endif
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/* Use to export labels from asm. */
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#define LABEL_MANGLE(a) EXTERN_PREFIX #a
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// Use rip-relative addressing if compiling PIC code on x86-64.
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#if ARCH_X86_64 && defined(PIC)
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# define LOCAL_MANGLE(a) #a "(%%rip)"
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#else
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# define LOCAL_MANGLE(a) #a
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#endif
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#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
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/* debug stuff */
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/* dprintf macros */
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#ifdef DEBUG
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# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
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#else
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# define dprintf(pctx, ...)
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#endif
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#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
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/* math */
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#if ARCH_X86
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#define MASK_ABS(mask, level)\
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__asm__ volatile(\
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"cltd \n\t"\
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"xorl %1, %0 \n\t"\
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"subl %1, %0 \n\t"\
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: "+a" (level), "=&d" (mask)\
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);
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#else
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#define MASK_ABS(mask, level)\
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mask = level >> 31;\
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level = (level ^ mask) - mask;
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#endif
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/* avoid usage of dangerous/inappropriate system functions */
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#undef malloc
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#define malloc please_use_av_malloc
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#undef free
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#define free please_use_av_free
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#undef realloc
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#define realloc please_use_av_realloc
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#undef time
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#define time time_is_forbidden_due_to_security_issues
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#undef rand
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#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
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#undef srand
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#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
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#undef random
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#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
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#undef sprintf
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#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
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#undef strcat
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#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
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#undef exit
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#define exit exit_is_forbidden
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#ifndef LIBAVFORMAT_BUILD
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#undef printf
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#define printf please_use_av_log_instead_of_printf
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#undef fprintf
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#define fprintf please_use_av_log_instead_of_fprintf
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#undef puts
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#define puts please_use_av_log_instead_of_puts
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#undef perror
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#define perror please_use_av_log_instead_of_perror
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#endif
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#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
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{\
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p = av_malloc(size);\
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if (p == NULL && (size) != 0) {\
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av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
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goto label;\
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}\
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}
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#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
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{\
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p = av_mallocz(size);\
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if (p == NULL && (size) != 0) {\
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av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
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goto label;\
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}\
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}
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#include "libm.h"
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/**
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* Returns NULL if CONFIG_SMALL is true, otherwise the argument
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* without modification. Used to disable the definition of strings
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* (for example AVCodec long_names).
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*/
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#if CONFIG_SMALL
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# define NULL_IF_CONFIG_SMALL(x) NULL
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#else
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# define NULL_IF_CONFIG_SMALL(x) x
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#endif
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#endif /* AVUTIL_INTERNAL_H */
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