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 #include "macros.h"
41 #include "pixfmt.h"
42 
43 #if ARCH_X86
44 # include "x86/emms.h"
45 #endif
46 
47 #ifndef emms_c
48 # define emms_c()
49 #endif
50 
51 #ifndef attribute_align_arg
52 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
53 # define attribute_align_arg __attribute__((force_align_arg_pointer))
54 #else
55 # define attribute_align_arg
56 #endif
57 #endif
58 
59 #if defined(_MSC_VER) && CONFIG_SHARED
60 # define av_export __declspec(dllimport)
61 #else
62 # define av_export
63 #endif
64 
65 #if HAVE_PRAGMA_DEPRECATED
66 # if defined(__ICL)
67 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))
68 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
69 # elif defined(_MSC_VER)
70 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996))
71 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
72 # else
73 # define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
74 # define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
75 # endif
76 #else
77 # define FF_DISABLE_DEPRECATION_WARNINGS
78 # define FF_ENABLE_DEPRECATION_WARNINGS
79 #endif
80 
81 // Some broken preprocessors need a second expansion
82 // to be forced to tokenize __VA_ARGS__
83 #define E1(x) x
84 
85 /* Check if the hard coded offset of a struct member still matches reality.
86  * Induce a compilation failure if not.
87  */
88 #define AV_CHECK_OFFSET(s, m, o) struct check_##o { \
89  int x_##o[offsetof(s, m) == o? 1: -1]; \
90  }
91 
92 #define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
93  uint8_t la_##v[sizeof(t s o) + (a)]; \
94  t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
95 
96 #define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
97  DECLARE_ALIGNED(a, t, la_##v) s o; \
98  t (*v) o = la_##v
99 
100 #define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
101 
102 #if HAVE_LOCAL_ALIGNED_8
103 # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
104 #else
105 # define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
106 #endif
107 
108 #if HAVE_LOCAL_ALIGNED_16
109 # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
110 #else
111 # define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
112 #endif
113 
114 #if HAVE_LOCAL_ALIGNED_32
115 # define LOCAL_ALIGNED_32(t, v, ...) E1(LOCAL_ALIGNED_D(32, t, v, __VA_ARGS__,,))
116 #else
117 # define LOCAL_ALIGNED_32(t, v, ...) LOCAL_ALIGNED(32, t, v, __VA_ARGS__)
118 #endif
119 
120 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
121 {\
122  p = av_malloc(size);\
123  if (!(p) && (size) != 0) {\
124  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
125  goto label;\
126  }\
127 }
128 
129 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
130 {\
131  p = av_mallocz(size);\
132  if (!(p) && (size) != 0) {\
133  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
134  goto label;\
135  }\
136 }
137 
138 #include "libm.h"
139 
145 #if CONFIG_SMALL
146 # define NULL_IF_CONFIG_SMALL(x) NULL
147 #else
148 # define NULL_IF_CONFIG_SMALL(x) x
149 #endif
150 
151 
169 #if HAVE_SYMVER_ASM_LABEL
170 # define FF_SYMVER(type, name, args, ver) \
171  type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
172  type ff_##name args
173 #elif HAVE_SYMVER_GNU_ASM
174 # define FF_SYMVER(type, name, args, ver) \
175  __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
176  type ff_##name args; \
177  type ff_##name args
178 #endif
179 
185 #if HAVE_THREADS
186 # define ONLY_IF_THREADS_ENABLED(x) x
187 #else
188 # define ONLY_IF_THREADS_ENABLED(x) NULL
189 #endif
190 
198 void avpriv_report_missing_feature(void *avc,
199  const char *msg, ...) av_printf_format(2, 3);
200 
209 void avpriv_request_sample(void *avc,
210  const char *msg, ...) av_printf_format(2, 3);
211 
212 #if HAVE_LIBC_MSVCRT
213 #include <crtversion.h>
214 #if defined(_VC_CRT_MAJOR_VERSION) && _VC_CRT_MAJOR_VERSION < 14
215 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
216 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
217 #endif
218 
219 #define avpriv_open ff_open
220 #endif
221 
225 int avpriv_open(const char *filename, int flags, ...);
226 
227 int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
228 
229 #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:50
Utility Preprocessor macros.
#define av_printf_format(fmtpos, attrpos)
Definition: attributes.h:117
enum AVPixelFormat pix_fmt
Definition: movenc.c:853
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:66
pixel format definitions
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:142
AVPixelFormat
Pixel format.
Definition: pixfmt.h:57