/* * 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 #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 /** * Returns 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 */