mpegvideo_enc: drop outdated copy_picture_attributes() in favour of a modern av_frame...
[libav.git] / libavutil / internal.h
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1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
b78e7197 9 * version 2.1 of the License, or (at your option) any later version.
04d7f601 10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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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
2912e87a 17 * License along with Libav; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
05020c89 21/**
ba87f080 22 * @file
89c9ff50 23 * common internal API header
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24 */
25
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26#ifndef AVUTIL_INTERNAL_H
27#define AVUTIL_INTERNAL_H
05020c89 28
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29#if !defined(DEBUG) && !defined(NDEBUG)
30# define NDEBUG
31#endif
32
ed0fd852 33#include <limits.h>
99545457 34#include <stdint.h>
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35#include <stddef.h>
36#include <assert.h>
dbef3f46 37#include "config.h"
2ed6f399 38#include "attributes.h"
2f5421d5 39#include "timer.h"
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40#include "dict.h"
41
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42#if ARCH_X86
43# include "x86/emms.h"
44#endif
45
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46#ifndef emms_c
47# define emms_c()
48#endif
49
5e4c7ca2 50#ifndef attribute_align_arg
820818a3 51#if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
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52# define attribute_align_arg __attribute__((force_align_arg_pointer))
53#else
54# define attribute_align_arg
55#endif
56#endif
57
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58#if defined(_MSC_VER) && CONFIG_SHARED
59# define av_export __declspec(dllimport)
60#else
61# define av_export
62#endif
63
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64#if HAVE_PRAGMA_DEPRECATED
65# define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
66# define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
67#else
68# define FF_DISABLE_DEPRECATION_WARNINGS
69# define FF_ENABLE_DEPRECATION_WARNINGS
70#endif
71
cd107896 72#ifndef INT_BIT
28499cc8 73# define INT_BIT (CHAR_BIT * sizeof(int))
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74#endif
75
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76// Some broken preprocessors need a second expansion
77// to be forced to tokenize __VA_ARGS__
fd1abf42 78#define E1(x) x
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79
80#define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
81 uint8_t la_##v[sizeof(t s o) + (a)]; \
82 t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
83
84#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
85 DECLARE_ALIGNED(a, t, la_##v) s o; \
86 t (*v) o = la_##v
87
fd1abf42 88#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
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89
90#if HAVE_LOCAL_ALIGNED_8
fd1abf42 91# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
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92#else
93# define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
94#endif
95
96#if HAVE_LOCAL_ALIGNED_16
fd1abf42 97# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
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98#else
99# define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
100#endif
101
d31dbec3 102#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
e48a0966 103{\
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104 p = av_malloc(size);\
105 if (p == NULL && (size) != 0) {\
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106 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
107 goto label;\
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108 }\
109}
110
d31dbec3 111#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
05020c89 112{\
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113 p = av_mallocz(size);\
114 if (p == NULL && (size) != 0) {\
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115 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
116 goto label;\
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117 }\
118}
119
335ee1aa 120#include "libm.h"
7b04b8a0 121
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122#if defined(_MSC_VER) && !CONFIG_SHARED
123#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
124#pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
125#endif
126
d80a7fe5 127/**
49bd8e4b 128 * Return NULL if CONFIG_SMALL is true, otherwise the argument
bfe3676f 129 * without modification. Used to disable the definition of strings
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130 * (for example AVCodec long_names).
131 */
132#if CONFIG_SMALL
133# define NULL_IF_CONFIG_SMALL(x) NULL
134#else
135# define NULL_IF_CONFIG_SMALL(x) x
136#endif
137
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138
139/**
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140 * Define a function with only the non-default version specified.
141 *
142 * On systems with ELF shared libraries, all symbols exported from
2912e87a 143 * Libav libraries are tagged with the name and major version of the
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144 * library to which they belong. If a function is moved from one
145 * library to another, a wrapper must be retained in the original
146 * location to preserve binary compatibility.
147 *
148 * Functions defined with this macro will never be used to resolve
149 * symbols by the build-time linker.
150 *
151 * @param type return type of function
152 * @param name name of function
153 * @param args argument list of function
154 * @param ver version tag to assign function
33586ee7 155 */
b462d132 156#if HAVE_SYMVER_ASM_LABEL
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157# define FF_SYMVER(type, name, args, ver) \
158 type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
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159 type ff_##name args
160#elif HAVE_SYMVER_GNU_ASM
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161# define FF_SYMVER(type, name, args, ver) \
162 __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
163 type ff_##name args; \
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164 type ff_##name args
165#endif
166
37b00b47 167/**
58c42af7 168 * Return NULL if a threading library has not been enabled.
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169 * Used to disable threading functions in AVCodec definitions
170 * when not needed.
171 */
172#if HAVE_THREADS
173# define ONLY_IF_THREADS_ENABLED(x) x
174#else
175# define ONLY_IF_THREADS_ENABLED(x) NULL
176#endif
177
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178/**
179 * Log a generic warning message about a missing feature.
180 *
181 * @param[in] avc a pointer to an arbitrary struct of which the first
182 * field is a pointer to an AVClass struct
183 * @param[in] msg string containing the name of the missing feature
184 */
185void avpriv_report_missing_feature(void *avc,
186 const char *msg, ...) av_printf_format(2, 3);
187
188/**
189 * Log a generic warning message about a missing feature.
190 * Additionally request that a sample showcasing the feature be uploaded.
191 *
192 * @param[in] avc a pointer to an arbitrary struct of which the first field is
193 * a pointer to an AVClass struct
194 * @param[in] msg string containing the name of the missing feature
195 */
196void avpriv_request_sample(void *avc,
197 const char *msg, ...) av_printf_format(2, 3);
198
98790382 199#endif /* AVUTIL_INTERNAL_H */