| /* |
| * 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" |
| |
| struct AVDictionary { |
| int count; |
| AVDictionaryEntry *elems; |
| }; |
| |
| #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 |
| |
| #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) |
| #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 |
| |
| #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) |
| |
| /* debug stuff */ |
| |
| #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) |
| |
| /* 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)\ |
| ); |
| #else |
| #define MASK_ABS(mask, level)\ |
| mask = level >> 31;\ |
| level = (level ^ mask) - mask; |
| #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 strncpy |
| #define strncpy strncpy_is_forbidden_due_to_security_issues_use_av_strlcpy |
| #undef exit |
| #define exit exit_is_forbidden |
| #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 |
| #undef strcasecmp |
| #define strcasecmp please_use_av_strcasecmp |
| #undef strncasecmp |
| #define strncasecmp please_use_av_strncasecmp |
| |
| #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 |
| /** |
| * 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"); |
| } |
| #else /* HAVE_MMX */ |
| #define emms_c() |
| #endif /* HAVE_MMX */ |
| |
| #endif /* AVUTIL_INTERNAL_H */ |