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 "pixfmt.h"
41 
42 #if ARCH_X86
43 # include "x86/emms.h"
44 #endif
45 
46 #ifndef emms_c
47 # define emms_c()
48 #endif
49 
50 #ifndef attribute_align_arg
51 #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2)
52 # define attribute_align_arg __attribute__((force_align_arg_pointer))
53 #else
54 # define attribute_align_arg
55 #endif
56 #endif
57 
58 #if defined(_MSC_VER) && CONFIG_SHARED
59 # define av_export __declspec(dllimport)
60 #else
61 # define av_export
62 #endif
63 
64 #if HAVE_PRAGMA_DEPRECATED
65 # if defined(__ICL)
66 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478))
67 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
68 # elif defined(_MSC_VER)
69 # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996))
70 # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop))
71 # else
72 # define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"")
73 # define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic warning \"-Wdeprecated-declarations\"")
74 # endif
75 #else
76 # define FF_DISABLE_DEPRECATION_WARNINGS
77 # define FF_ENABLE_DEPRECATION_WARNINGS
78 #endif
79 
80 #ifndef INT_BIT
81 # define INT_BIT (CHAR_BIT * sizeof(int))
82 #endif
83 
84 // Some broken preprocessors need a second expansion
85 // to be forced to tokenize __VA_ARGS__
86 #define E1(x) x
87 
88 /* Check if the hard coded offset of a struct member still matches reality.
89  * Induce a compilation failure if not.
90  */
91 #define AV_CHECK_OFFSET(s, m, o) struct check_##o { \
92  int x_##o[offsetof(s, m) == o? 1: -1]; \
93  }
94 
95 #define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
96  uint8_t la_##v[sizeof(t s o) + (a)]; \
97  t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
98 
99 #define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
100  DECLARE_ALIGNED(a, t, la_##v) s o; \
101  t (*v) o = la_##v
102 
103 #define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
104 
105 #if HAVE_LOCAL_ALIGNED_8
106 # define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
107 #else
108 # define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
109 #endif
110 
111 #if HAVE_LOCAL_ALIGNED_16
112 # define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
113 #else
114 # define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
115 #endif
116 
117 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
118 {\
119  p = av_malloc(size);\
120  if (!(p) && (size) != 0) {\
121  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
122  goto label;\
123  }\
124 }
125 
126 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
127 {\
128  p = av_mallocz(size);\
129  if (!(p) && (size) != 0) {\
130  av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
131  goto label;\
132  }\
133 }
134 
135 #include "libm.h"
136 
137 #if defined(_MSC_VER)
138 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_strtod")
139 #pragma comment(linker, "/include:"EXTERN_PREFIX"avpriv_snprintf")
140 #endif
141 
147 #if CONFIG_SMALL
148 # define NULL_IF_CONFIG_SMALL(x) NULL
149 #else
150 # define NULL_IF_CONFIG_SMALL(x) x
151 #endif
152 
153 
171 #if HAVE_SYMVER_ASM_LABEL
172 # define FF_SYMVER(type, name, args, ver) \
173  type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
174  type ff_##name args
175 #elif HAVE_SYMVER_GNU_ASM
176 # define FF_SYMVER(type, name, args, ver) \
177  __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
178  type ff_##name args; \
179  type ff_##name args
180 #endif
181 
187 #if HAVE_THREADS
188 # define ONLY_IF_THREADS_ENABLED(x) x
189 #else
190 # define ONLY_IF_THREADS_ENABLED(x) NULL
191 #endif
192 
200 void avpriv_report_missing_feature(void *avc,
201  const char *msg, ...) av_printf_format(2, 3);
202 
211 void avpriv_request_sample(void *avc,
212  const char *msg, ...) av_printf_format(2, 3);
213 
214 #if HAVE_LIBC_MSVCRT
215 #define avpriv_open ff_open
216 #endif
217 
221 int avpriv_open(const char *filename, int flags, ...);
222 
223 int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt);
224 
225 #endif /* AVUTIL_INTERNAL_H */
void void avpriv_request_sample(void *avc, const char *msg,...) av_printf_format(2
Log a generic warning message about a missing feature.
pixel format definitions
static int flags
Definition: log.c:44
Public dictionary API.
AVPixelFormat
Pixel format.
Definition: pixfmt.h:63
#define av_printf_format(fmtpos, attrpos)
Definition: attributes.h:117
enum AVPixelFormat pix_fmt
Definition: movenc.c:843
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.
Macro definitions for various function/variable attributes.
void void int avpriv_open(const char *filename, int flags,...)
A wrapper for open() setting O_CLOEXEC.
Definition: file_open.c:71
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
Definition: imgutils.c:141