chromium/third_party/ffmpeg/libavutil/internal.h

/*
 * copyright (c) 2006 Michael Niedermayer <[email protected]>
 *
 * 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

// This can be enabled to allow detection of additional integer overflows with ubsan
//#define CHECKED

#include <limits.h>
#include <stdint.h>
#include <stddef.h>
#include <assert.h>
#include <stdio.h>
#include "config.h"
#include "attributes.h"
#include "libm.h"
#include "macros.h"

#ifndef attribute_align_arg
#if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
#define attribute_align_arg …
#else
#define attribute_align_arg
#endif
#endif

#if defined(_WIN32) && CONFIG_SHARED && !defined(BUILDING_avutil)
#define av_export_avutil …
#else
#define av_export_avutil
#endif

#if HAVE_PRAGMA_DEPRECATED
#    if defined(__ICL) || defined (__INTEL_COMPILER)
#define FF_DISABLE_DEPRECATION_WARNINGS …
#define FF_ENABLE_DEPRECATION_WARNINGS …
#    elif defined(_MSC_VER)
#define FF_DISABLE_DEPRECATION_WARNINGS …
#define FF_ENABLE_DEPRECATION_WARNINGS …
#    else
#define FF_DISABLE_DEPRECATION_WARNINGS …
#define FF_ENABLE_DEPRECATION_WARNINGS …
#    endif
#else
#define FF_DISABLE_DEPRECATION_WARNINGS
#define FF_ENABLE_DEPRECATION_WARNINGS
#endif


#define FF_ALLOC_TYPED_ARRAY(p, nelem) …
#define FF_ALLOCZ_TYPED_ARRAY(p, nelem) …

#define FF_PTR_ADD(ptr, off) …

/**
 * Access a field in a structure by its offset.
 */
#define FF_FIELD_AT(type, off, obj) …

/**
 * Return NULL if CONFIG_SMALL is true, otherwise the argument
 * without modification. Used to disable the definition of strings.
 */
#if CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL …
#else
#define NULL_IF_CONFIG_SMALL(x) …
#endif

/**
 * Log a generic warning message about a missing feature.
 *
 * @param[in] avc a pointer to an arbitrary struct of which the first
 *                field is a pointer to an AVClass struct
 * @param[in] msg string containing the name of the missing feature
 */
#if defined(CHROMIUM_NO_LOGGING)
#define avpriv_report_missing_feature …
#else
void avpriv_report_missing_feature(void *avc,
                                   const char *msg, ...) av_printf_format(2, 3);
#endif

/**
 * Log a generic warning message about a missing feature.
 * Additionally request that a sample showcasing the feature be uploaded.
 *
 * @param[in] avc a pointer to an arbitrary struct of which the first field is
 *                a pointer to an AVClass struct
 * @param[in] msg string containing the name of the missing feature
 */
#if defined(CHROMIUM_NO_LOGGING)
#define avpriv_request_sample …
#else
void avpriv_request_sample(void *avc,
                           const char *msg, ...) av_printf_format(2, 3);
#endif

#if HAVE_LIBC_MSVCRT
#include <crtversion.h>
#if defined(_VC_CRT_MAJOR_VERSION) && _VC_CRT_MAJOR_VERSION < 14
#pragma comment(linker, "/include:" EXTERN_PREFIX "avpriv_strtod")
#pragma comment(linker, "/include:" EXTERN_PREFIX "avpriv_snprintf")
#endif

#define PTRDIFF_SPECIFIER …
#define SIZE_SPECIFIER …
#else
#define PTRDIFF_SPECIFIER …
#define SIZE_SPECIFIER …
#endif

#ifdef DEBUG
#define ff_dlog …
#elif defined(CHROMIUM_NO_LOGGING)
#define ff_dlog …
#else
#define ff_dlog(ctx, ...) …
#endif

#ifdef TRACE
#define ff_tlog …
#else
#define ff_tlog(ctx, ...) …
#endif

// For debuging we use signed operations so overflows can be detected (by ubsan)
// For production we use unsigned so there are no undefined operations
#ifdef CHECKED
#define SUINT …
#define SUINT32 …
#else
#define SUINT …
#define SUINT32 …
#endif

static av_always_inline av_const int avpriv_mirror(int x, int w)
{ … }

#endif /* AVUTIL_INTERNAL_H */