| /* |
| * 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" |
| |
| #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 |
| * 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 |
| |
| #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) |
| { |
| if(av_get_cpu_flags() & AV_CPU_FLAG_MMX) |
| __asm__ volatile ("emms" ::: "memory"); |
| } |
| #elif HAVE_MMX && HAVE_MM_EMPTY |
| # include <mmintrin.h> |
| # define emms_c _mm_empty |
| #else |
| # define emms_c() |
| #endif /* HAVE_MMX_INLINE */ |
| |
| #endif /* AVUTIL_INTERNAL_H */ |