mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
151 lines
4.1 KiB
151 lines
4.1 KiB
/* |
|
* 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" |
|
#include "dict.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 |
|
|
|
#if defined(_MSC_VER) && CONFIG_SHARED |
|
# define av_export __declspec(dllimport) |
|
#else |
|
# define av_export |
|
#endif |
|
|
|
#ifndef INT_BIT |
|
# define INT_BIT (CHAR_BIT * sizeof(int)) |
|
#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 |
|
|
|
/** |
|
* 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 |
|
|
|
#if HAVE_MMX_INLINE |
|
/** |
|
* 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) |
|
{ |
|
__asm__ volatile ("emms" ::: "memory"); |
|
} |
|
#elif HAVE_MMX && HAVE_MM_EMPTY |
|
# include <mmintrin.h> |
|
# define emms_c _mm_empty |
|
#elif HAVE_MMX && HAVE_YASM |
|
# include "libavutil/x86/emms.h" |
|
# define emms_c avpriv_emms_yasm |
|
#else |
|
# define emms_c() |
|
#endif /* HAVE_MMX_INLINE */ |
|
|
|
#endif /* AVUTIL_INTERNAL_H */
|
|
|