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- /*
- * 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"
- #include "version.h"
- #if ARCH_X86
- # include "x86/emms.h"
- #endif
- #ifndef emms_c
- # define emms_c()
- #endif
- #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
- #if defined(_MSC_VER) && CONFIG_SHARED
- # define av_export __declspec(dllimport)
- #else
- # define av_export
- #endif
- #if HAVE_PRAGMA_DEPRECATED
- # if defined(__ICL) || defined (__INTEL_COMPILER)
- # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))
- # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
- # elif defined(_MSC_VER)
- # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996))
- # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
- # else
- # define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
- # define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
- # endif
- #else
- # define FF_DISABLE_DEPRECATION_WARNINGS
- # define FF_ENABLE_DEPRECATION_WARNINGS
- #endif
- #ifndef INT_BIT
- # define INT_BIT (CHAR_BIT * sizeof(int))
- #endif
- #define FF_MEMORY_POISON 0x2a
- #define MAKE_ACCESSORS(str, name, type, field) \
- type av_##name##_get_##field(const str *s) { return s->field; } \
- void av_##name##_set_##field(str *s, type v) { s->field = v; }
- // Some broken preprocessors need a second expansion
- // to be forced to tokenize __VA_ARGS__
- #define E1(x) x
- /* Check if the hard coded offset of a struct member still matches reality.
- * Induce a compilation failure if not.
- */
- #define AV_CHECK_OFFSET(s, m, o) struct check_##o { \
- int x_##o[offsetof(s, m) == o? 1: -1]; \
- }
- #define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
- uint8_t la_##v[sizeof(t s o) + (a)]; \
- t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
- #define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
- DECLARE_ALIGNED(a, t, la_##v) s o; \
- t (*v) o = la_##v
- #define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
- #if HAVE_LOCAL_ALIGNED_8
- # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
- #else
- # define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
- #endif
- #if HAVE_LOCAL_ALIGNED_16
- # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
- #else
- # define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
- #endif
- #if HAVE_LOCAL_ALIGNED_32
- # define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_D(32, t, v, __VA_ARGS__,,))
- #else
- # define LOCAL_ALIGNED_32(t, v, ...) LOCAL_ALIGNED(32, t, v, __VA_ARGS__)
- #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;\
- }\
- }
- #define FF_ALLOC_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\
- {\
- p = av_malloc_array(nelem, elsize);\
- if (p == NULL) {\
- av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
- goto label;\
- }\
- }
- #define FF_ALLOCZ_ARRAY_OR_GOTO(ctx, p, nelem, elsize, label)\
- {\
- p = av_mallocz_array(nelem, elsize);\
- if (p == NULL) {\
- av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
- goto label;\
- }\
- }
- #include "libm.h"
- #if defined(_MSC_VER)
- #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
- #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
- #endif
- /**
- * 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
- /**
- * Return 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
- /**
- * 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
- */
- void avpriv_report_missing_feature(void *avc,
- const char *msg, ...) av_printf_format(2, 3);
- /**
- * 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
- */
- void avpriv_request_sample(void *avc,
- const char *msg, ...) av_printf_format(2, 3);
- #if HAVE_LIBC_MSVCRT
- #define avpriv_open ff_open
- #define PTRDIFF_SPECIFIER "Id"
- #define SIZE_SPECIFIER "Iu"
- #else
- #define PTRDIFF_SPECIFIER "td"
- #define SIZE_SPECIFIER "zu"
- #endif
- /**
- * A wrapper for open() setting O_CLOEXEC.
- */
- int avpriv_open(const char *filename, int flags, ...);
- #if FF_API_GET_CHANNEL_LAYOUT_COMPAT
- uint64_t ff_get_channel_layout(const char *name, int compat);
- #endif
- #endif /* AVUTIL_INTERNAL_H */
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