1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
/*
* 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"
#ifndef attribute_align_arg
#if ARCH_X86_32 && (!defined(__INTEL_COMPILER) || __INTEL_COMPILER > 1200) && 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 exit
#define exit exit_is_forbidden
#ifndef LIBAVFORMAT_BUILD
#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
#endif
#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
#endif /* AVUTIL_INTERNAL_H */
|
