X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavutil%2Finternal.h;h=33a52266c5ef715d9c6d07daab97c017f27242e8;hb=5b4797a21db900b7d509660b7a4d49829089b004;hp=748a823ac44117cc1ec544ac607eba53f4b8655d;hpb=dfd2a005eb29e4b9f2fdb97036eb7d5c38ae4bd4;p=ffmpeg diff --git a/libavutil/internal.h b/libavutil/internal.h index 748a823ac44..33a52266c5e 100644 --- a/libavutil/internal.h +++ b/libavutil/internal.h @@ -1,20 +1,20 @@ /* * copyright (c) 2006 Michael Niedermayer * - * This file is part of FFmpeg. + * This file is part of Libav. * - * FFmpeg is free software; you can redistribute it and/or + * 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. * - * FFmpeg is distributed in the hope that it will be useful, + * 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 FFmpeg; if not, write to the Free Software + * License along with Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -37,131 +37,74 @@ #include "config.h" #include "attributes.h" #include "timer.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 && (!defined(__ICC) || __ICC > 1200) && AV_GCC_VERSION_AT_LEAST(4,2) +#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 - -/** - * Mark a variable as used and prevent the compiler from optimizing it away. - * This is useful for asm that accesses varibles in ways that the compiler does not - * understand - */ -#ifndef attribute_used -#if AV_GCC_VERSION_AT_LEAST(3,1) -# define attribute_used __attribute__((used)) +#if defined(_MSC_VER) && CONFIG_SHARED +# define av_export __declspec(dllimport) #else -# define attribute_used -#endif -#endif - -#ifndef INT16_MIN -#define INT16_MIN (-0x7fff - 1) -#endif - -#ifndef INT16_MAX -#define INT16_MAX 0x7fff -#endif - -#ifndef INT32_MIN -#define INT32_MIN (-0x7fffffff - 1) -#endif - -#ifndef INT32_MAX -#define INT32_MAX 0x7fffffff -#endif - -#ifndef UINT32_MAX -#define UINT32_MAX 0xffffffff -#endif - -#ifndef INT64_MIN -#define INT64_MIN (-0x7fffffffffffffffLL - 1) -#endif - -#ifndef INT64_MAX -#define INT64_MAX INT64_C(9223372036854775807) -#endif - -#ifndef UINT64_MAX -#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF) +# define av_export +#endif + +#if HAVE_PRAGMA_DEPRECATED +# if defined(__ICL) +# 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 -#ifndef offsetof -# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F)) -#endif - -/* Use to export labels from asm. */ -#define LABEL_MANGLE(a) EXTERN_PREFIX #a - -// Use rip-relative addressing if compiling PIC code on x86-64. -#if ARCH_X86_64 && defined(PIC) -# define LOCAL_MANGLE(a) #a "(%%rip)" -#else -# define LOCAL_MANGLE(a) #a -#endif +// Some broken preprocessors need a second expansion +// to be forced to tokenize __VA_ARGS__ +#define E1(x) x -#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) +#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) -/* debug stuff */ +#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \ + DECLARE_ALIGNED(a, t, la_##v) s o; \ + t (*v) o = la_##v -#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) +#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,)) -/* math */ - -#if ARCH_X86 -#define MASK_ABS(mask, level)\ - __asm__ volatile(\ - "cltd \n\t"\ - "xorl %1, %0 \n\t"\ - "subl %1, %0 \n\t"\ - : "+a" (level), "=&d" (mask)\ - ); +#if HAVE_LOCAL_ALIGNED_8 +# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,)) #else -#define MASK_ABS(mask, level)\ - mask = level >> 31;\ - level = (level ^ mask) - mask; +# define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__) #endif -/* avoid usage of dangerous/inappropriate system functions */ -#undef malloc -#define malloc please_use_av_malloc -#undef free -#define free please_use_av_free -#undef realloc -#define realloc please_use_av_realloc -#undef time -#define time time_is_forbidden_due_to_security_issues -#undef rand -#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get -#undef srand -#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init -#undef random -#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get -#undef sprintf -#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf -#undef strcat -#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat -#undef exit -#define exit exit_is_forbidden -#ifndef LIBAVFORMAT_BUILD -#undef printf -#define printf please_use_av_log_instead_of_printf -#undef fprintf -#define fprintf please_use_av_log_instead_of_fprintf -#undef puts -#define puts please_use_av_log_instead_of_puts -#undef perror -#define perror please_use_av_log_instead_of_perror +#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)\ @@ -184,6 +127,11 @@ #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 @@ -200,7 +148,7 @@ * 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 + * 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. @@ -224,4 +172,45 @@ 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 +#endif + +/** + * A wrapper for open() setting O_CLOEXEC. + */ +int avpriv_open(const char *filename, int flags, ...); + #endif /* AVUTIL_INTERNAL_H */