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1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
4 * This file is part of FFmpeg.
5 *
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.
10 *
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.
15 *
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
19 */
20
21/**
22 * @file libavutil/internal.h
23 * common internal API header
24 */
25
26#ifndef AVUTIL_INTERNAL_H
27#define AVUTIL_INTERNAL_H
28
29#if !defined(DEBUG) && !defined(NDEBUG)
30# define NDEBUG
31#endif
32
33#include <limits.h>
34#include <stdint.h>
35#include <stddef.h>
36#include <assert.h>
37//#include "config.h"
38#include "attributes.h"
39//#include "timer.h"
40
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))
44#else
45# define attribute_align_arg
46#endif
47#endif
48
49#ifndef attribute_used
50#if AV_GCC_VERSION_AT_LEAST(3,1)
51# define attribute_used __attribute__((used))
52#else
53# define attribute_used
54#endif
55#endif
56
57#ifndef av_alias
58#if HAVE_ATTRIBUTE_MAY_ALIAS && (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(3,3)
59# define av_alias __attribute__((may_alias))
60#else
61# define av_alias
62#endif
63#endif
64
65#ifndef INT16_MIN
66#define INT16_MIN (-0x7fff - 1)
67#endif
68
69#ifndef INT16_MAX
70#define INT16_MAX 0x7fff
71#endif
72
73#ifndef INT32_MIN
74#define INT32_MIN (-0x7fffffff - 1)
75#endif
76
77#ifndef INT32_MAX
78#define INT32_MAX 0x7fffffff
79#endif
80
81#ifndef UINT32_MAX
82#define UINT32_MAX 0xffffffff
83#endif
84
85#ifndef INT64_MIN
86#define INT64_MIN (-0x7fffffffffffffffLL - 1)
87#endif
88
89#ifndef INT64_MAX
90#define INT64_MAX INT64_C(9223372036854775807)
91#endif
92
93#ifndef UINT64_MAX
94#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
95#endif
96
97#ifndef INT_BIT
98# define INT_BIT (CHAR_BIT * sizeof(int))
99#endif
100
101#ifndef offsetof
102# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
103#endif
104
105/* Use to export labels from asm. */
106#define LABEL_MANGLE(a) EXTERN_PREFIX #a
107
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)"
111#else
112# define LOCAL_MANGLE(a) #a
113#endif
114
115#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
116
117/* debug stuff */
118
119/* dprintf macros */
120#ifdef DEBUG
121# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
122#else
123# define dprintf(pctx, ...)
124#endif
125
126#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
127
128/* math */
129
130#if ARCH_X86
131#define MASK_ABS(mask, level)\
132 __asm__ volatile(\
133 "cltd \n\t"\
134 "xorl %1, %0 \n\t"\
135 "subl %1, %0 \n\t"\
136 : "+a" (level), "=&d" (mask)\
137 );
138#else
139#define MASK_ABS(mask, level)\
140 mask = level >> 31;\
141 level = (level ^ mask) - mask;
142#endif
143
144/* avoid usage of dangerous/inappropriate system functions */
145#undef malloc
146#define malloc please_use_av_malloc
147#undef free
148#define free please_use_av_free
149#undef realloc
150#define realloc please_use_av_realloc
151#undef time
152#define time time_is_forbidden_due_to_security_issues
153#undef rand
154#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
155#undef srand
156#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
157#undef random
158#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
159#undef sprintf
160#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
161#undef strcat
162#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
163#undef exit
164#define exit exit_is_forbidden
165#ifndef LIBAVFORMAT_BUILD
166#undef printf
167#define printf please_use_av_log_instead_of_printf
168#undef fprintf
169#define fprintf please_use_av_log_instead_of_fprintf
170#undef puts
171#define puts please_use_av_log_instead_of_puts
172#undef perror
173#define perror please_use_av_log_instead_of_perror
174#endif
175
176#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
177{\
178 p = av_malloc(size);\
179 if (p == NULL && (size) != 0) {\
180 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
181 goto label;\
182 }\
183}
184
185#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
186{\
187 p = av_mallocz(size);\
188 if (p == NULL && (size) != 0) {\
189 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
190 goto label;\
191 }\
192}
193
194//#include "libm.h"
195
196/**
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).
200 */
201#if CONFIG_SMALL
202# define NULL_IF_CONFIG_SMALL(x) NULL
203#else
204# define NULL_IF_CONFIG_SMALL(x) x
205#endif
206
207#endif /* AVUTIL_INTERNAL_H */