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234 lines
6.2 KiB
234 lines
6.2 KiB
/* |
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* copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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/** |
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* @file |
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* common internal API header |
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*/ |
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#ifndef AVUTIL_INTERNAL_H |
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#define AVUTIL_INTERNAL_H |
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#if !defined(DEBUG) && !defined(NDEBUG) |
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# define NDEBUG |
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#endif |
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#include <limits.h> |
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#include <stdint.h> |
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#include <stddef.h> |
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#include <assert.h> |
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#include "config.h" |
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#include "attributes.h" |
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#include "timer.h" |
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#ifndef attribute_align_arg |
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#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2) |
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# define attribute_align_arg __attribute__((force_align_arg_pointer)) |
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#else |
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# define attribute_align_arg |
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#endif |
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#endif |
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/** |
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* Mark a variable as used and prevent the compiler from optimizing it away. |
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* This is useful for asm that accesses varibles in ways that the compiler does not |
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* understand |
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*/ |
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#ifndef attribute_used |
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#if AV_GCC_VERSION_AT_LEAST(3,1) |
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# define attribute_used __attribute__((used)) |
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#else |
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# define attribute_used |
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#endif |
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#endif |
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#ifndef INT16_MIN |
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#define INT16_MIN (-0x7fff - 1) |
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#endif |
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#ifndef INT16_MAX |
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#define INT16_MAX 0x7fff |
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#endif |
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#ifndef INT32_MIN |
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#define INT32_MIN (-0x7fffffff - 1) |
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#endif |
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#ifndef INT32_MAX |
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#define INT32_MAX 0x7fffffff |
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#endif |
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#ifndef UINT32_MAX |
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#define UINT32_MAX 0xffffffff |
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#endif |
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#ifndef INT64_MIN |
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#define INT64_MIN (-0x7fffffffffffffffLL - 1) |
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#endif |
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#ifndef INT64_MAX |
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#define INT64_MAX INT64_C(9223372036854775807) |
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#endif |
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#ifndef UINT64_MAX |
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#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF) |
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#endif |
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#ifndef INT_BIT |
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# define INT_BIT (CHAR_BIT * sizeof(int)) |
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#endif |
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#ifndef offsetof |
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# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F)) |
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#endif |
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/* Use to export labels from asm. */ |
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#define LABEL_MANGLE(a) EXTERN_PREFIX #a |
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// Use rip-relative addressing if compiling PIC code on x86-64. |
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#if ARCH_X86_64 && defined(PIC) |
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# define LOCAL_MANGLE(a) #a "(%%rip)" |
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#else |
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# define LOCAL_MANGLE(a) #a |
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#endif |
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#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a) |
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/* debug stuff */ |
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/* dprintf macros */ |
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#ifdef DEBUG |
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# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__) |
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#else |
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# define dprintf(pctx, ...) |
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#endif |
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#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0) |
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/* math */ |
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#if ARCH_X86 |
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#define MASK_ABS(mask, level)\ |
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__asm__ volatile(\ |
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"cltd \n\t"\ |
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"xorl %1, %0 \n\t"\ |
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"subl %1, %0 \n\t"\ |
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: "+a" (level), "=&d" (mask)\ |
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); |
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#else |
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#define MASK_ABS(mask, level)\ |
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mask = level >> 31;\ |
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level = (level ^ mask) - mask; |
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#endif |
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/* avoid usage of dangerous/inappropriate system functions */ |
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#undef malloc |
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#define malloc please_use_av_malloc |
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#undef free |
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#define free please_use_av_free |
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#undef realloc |
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#define realloc please_use_av_realloc |
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#undef time |
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#define time time_is_forbidden_due_to_security_issues |
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#undef rand |
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#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get |
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#undef srand |
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#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init |
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#undef random |
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#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get |
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#undef sprintf |
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#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf |
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#undef strcat |
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#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat |
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#undef exit |
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#define exit exit_is_forbidden |
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#ifndef LIBAVFORMAT_BUILD |
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#undef printf |
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#define printf please_use_av_log_instead_of_printf |
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#undef fprintf |
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#define fprintf please_use_av_log_instead_of_fprintf |
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#undef puts |
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#define puts please_use_av_log_instead_of_puts |
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#undef perror |
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#define perror please_use_av_log_instead_of_perror |
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#endif |
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#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\ |
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{\ |
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p = av_malloc(size);\ |
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if (p == NULL && (size) != 0) {\ |
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av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ |
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goto label;\ |
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}\ |
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} |
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#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\ |
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{\ |
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p = av_mallocz(size);\ |
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if (p == NULL && (size) != 0) {\ |
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av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\ |
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goto label;\ |
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}\ |
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} |
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#include "libm.h" |
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/** |
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* Return NULL if CONFIG_SMALL is true, otherwise the argument |
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* without modification. Used to disable the definition of strings |
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* (for example AVCodec long_names). |
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*/ |
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#if CONFIG_SMALL |
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# define NULL_IF_CONFIG_SMALL(x) NULL |
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#else |
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# define NULL_IF_CONFIG_SMALL(x) x |
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#endif |
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/** |
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* Define a function with only the non-default version specified. |
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* |
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* On systems with ELF shared libraries, all symbols exported from |
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* FFmpeg libraries are tagged with the name and major version of the |
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* library to which they belong. If a function is moved from one |
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* library to another, a wrapper must be retained in the original |
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* location to preserve binary compatibility. |
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* |
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* Functions defined with this macro will never be used to resolve |
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* symbols by the build-time linker. |
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* |
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* @param type return type of function |
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* @param name name of function |
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* @param args argument list of function |
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* @param ver version tag to assign function |
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*/ |
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#if HAVE_SYMVER_ASM_LABEL |
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# define FF_SYMVER(type, name, args, ver) \ |
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type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \ |
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type ff_##name args |
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#elif HAVE_SYMVER_GNU_ASM |
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# define FF_SYMVER(type, name, args, ver) \ |
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__asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \ |
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type ff_##name args; \ |
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type ff_##name args |
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#endif |
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#endif /* AVUTIL_INTERNAL_H */
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