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Diffstat (limited to 'ffmpeg1/libavutil/internal.h')
| -rw-r--r-- | ffmpeg1/libavutil/internal.h | 186 |
1 files changed, 186 insertions, 0 deletions
diff --git a/ffmpeg1/libavutil/internal.h b/ffmpeg1/libavutil/internal.h new file mode 100644 index 0000000..6ff14fa --- /dev/null +++ b/ffmpeg1/libavutil/internal.h @@ -0,0 +1,186 @@ +/* + * 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" + +#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 + +#ifndef INT_BIT +# define INT_BIT (CHAR_BIT * sizeof(int)) +#endif + +// Some broken preprocessors need a second expansion +// to be forced to tokenize __VA_ARGS__ +#define E1(x) x + +#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 + +#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 + +/** + * 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); + +#endif /* AVUTIL_INTERNAL_H */ |