Libav
internal.h
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1 /*
2  * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3  *
4  * This file is part of Libav.
5  *
6  * Libav 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  * Libav 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 Libav; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
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 "dict.h"
40 
41 #if ARCH_X86
42 # include "x86/emms.h"
43 #endif
44 
45 #ifndef emms_c
46 # define emms_c()
47 #endif
48 
49 #ifndef attribute_align_arg
50 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
51 # define attribute_align_arg __attribute__((force_align_arg_pointer))
52 #else
53 # define attribute_align_arg
54 #endif
55 #endif
56 
57 #if defined(_MSC_VER) && CONFIG_SHARED
58 # define av_export __declspec(dllimport)
59 #else
60 # define av_export
61 #endif
62 
63 #if HAVE_PRAGMA_DEPRECATED
64 # if defined(__ICL)
65 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))
66 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
67 # elif defined(_MSC_VER)
68 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996))
69 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
70 # else
71 # define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
72 # define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
73 # endif
74 #else
75 # define FF_DISABLE_DEPRECATION_WARNINGS
76 # define FF_ENABLE_DEPRECATION_WARNINGS
77 #endif
78 
79 #ifndef INT_BIT
80 # define INT_BIT (CHAR_BIT * sizeof(int))
81 #endif
82 
83 // Some broken preprocessors need a second expansion
84 // to be forced to tokenize __VA_ARGS__
85 #define E1(x) x
86 
87 #define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
88  uint8_t la_##v[sizeof(t s o) + (a)]; \
89  t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
90 
91 #define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
92  DECLARE_ALIGNED(a, t, la_##v) s o; \
93  t (*v) o = la_##v
94 
95 #define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
96 
97 #if HAVE_LOCAL_ALIGNED_8
98 # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
99 #else
100 # define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
101 #endif
102 
103 #if HAVE_LOCAL_ALIGNED_16
104 # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
105 #else
106 # define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
107 #endif
108 
109 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
110 {\
111  p = av_malloc(size);\
112  if (p == NULL && (size) != 0) {\
113  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
114  goto label;\
115  }\
116 }
117 
118 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
119 {\
120  p = av_mallocz(size);\
121  if (p == NULL && (size) != 0) {\
122  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
123  goto label;\
124  }\
125 }
126 
127 #include "libm.h"
128 
129 #if defined(_MSC_VER)
130 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
131 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
132 #endif
133 
139 #if CONFIG_SMALL
140 # define NULL_IF_CONFIG_SMALL(x) NULL
141 #else
142 # define NULL_IF_CONFIG_SMALL(x) x
143 #endif
144 
145 
163 #if HAVE_SYMVER_ASM_LABEL
164 # define FF_SYMVER(type, name, args, ver) \
165  type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
166  type ff_##name args
167 #elif HAVE_SYMVER_GNU_ASM
168 # define FF_SYMVER(type, name, args, ver) \
169  __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
170  type ff_##name args; \
171  type ff_##name args
172 #endif
173 
179 #if HAVE_THREADS
180 # define ONLY_IF_THREADS_ENABLED(x) x
181 #else
182 # define ONLY_IF_THREADS_ENABLED(x) NULL
183 #endif
184 
192 void avpriv_report_missing_feature(void *avc,
193  const char *msg, ...) av_printf_format(2, 3);
194 
203 void avpriv_request_sample(void *avc,
204  const char *msg, ...) av_printf_format(2, 3);
205 
206 #if HAVE_LIBC_MSVCRT
207 #define avpriv_open ff_open
208 #endif
209 
213 int avpriv_open(const char *filename, int flags, ...);
214 
215 #endif /* AVUTIL_INTERNAL_H */
Macro definitions for various function/variable attributes.
Public dictionary API.
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
static int flags
Definition: log.c:44
#define av_printf_format(fmtpos, attrpos)
Definition: attributes.h:117
Replacements for frequently missing libm functions.
void avpriv_report_missing_feature(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
void void int avpriv_open(const char *filename, int flags,...)
A wrapper for open() setting O_CLOEXEC.
Definition: file_open.c:71