2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * @file libavutil/internal.h
23 * common internal API header
26 #ifndef AVUTIL_INTERNAL_H
27 #define AVUTIL_INTERNAL_H
29 #if !defined(DEBUG) && !defined(NDEBUG)
38 #include "attributes.h"
41 #ifndef attribute_align_arg
42 #if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
43 # define attribute_align_arg __attribute__((force_align_arg_pointer))
45 # define attribute_align_arg
49 #ifndef attribute_used
50 #if AV_GCC_VERSION_AT_LEAST(3,1)
51 # define attribute_used __attribute__((used))
53 # define attribute_used
58 #if HAVE_ATTRIBUTE_MAY_ALIAS && (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(3,3)
59 # define av_alias __attribute__((may_alias))
66 #define INT16_MIN (-0x7fff - 1)
70 #define INT16_MAX 0x7fff
74 #define INT32_MIN (-0x7fffffff - 1)
78 #define INT32_MAX 0x7fffffff
82 #define UINT32_MAX 0xffffffff
86 #define INT64_MIN (-0x7fffffffffffffffLL - 1)
90 #define INT64_MAX INT64_C(9223372036854775807)
94 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
98 # define INT_BIT (CHAR_BIT * sizeof(int))
102 # define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
105 /* Use to export labels from asm. */
106 #define LABEL_MANGLE(a) EXTERN_PREFIX #a
108 // Use rip-relative addressing if compiling PIC code on x86-64.
109 #if ARCH_X86_64 && defined(PIC)
110 # define LOCAL_MANGLE(a) #a "(%%rip)"
112 # define LOCAL_MANGLE(a) #a
115 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
121 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
123 # define dprintf(pctx, ...)
126 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
131 #define MASK_ABS(mask, level)\
136 : "+a" (level), "=&d" (mask)\
139 #define MASK_ABS(mask, level)\
141 level = (level ^ mask) - mask;
144 /* avoid usage of dangerous/inappropriate system functions */
146 #define malloc please_use_av_malloc
148 #define free please_use_av_free
150 #define realloc please_use_av_realloc
152 #define time time_is_forbidden_due_to_security_issues
154 #define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
156 #define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
158 #define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
160 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
162 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
164 #define exit exit_is_forbidden
165 #ifndef LIBAVFORMAT_BUILD
167 #define printf please_use_av_log_instead_of_printf
169 #define fprintf please_use_av_log_instead_of_fprintf
171 #define puts please_use_av_log_instead_of_puts
173 #define perror please_use_av_log_instead_of_perror
176 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
178 p = av_malloc(size);\
179 if (p == NULL && (size) != 0) {\
180 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
185 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
187 p = av_mallocz(size);\
188 if (p == NULL && (size) != 0) {\
189 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
197 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
198 * without modification. Used to disable the definition of strings
199 * (for example AVCodec long_names).
202 # define NULL_IF_CONFIG_SMALL(x) NULL
204 # define NULL_IF_CONFIG_SMALL(x) x
207 #endif /* AVUTIL_INTERNAL_H */