ismindex: Check the return value of allocations
[libav.git] / libavutil / internal.h
CommitLineData
04d7f601
DB
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
04d7f601
DB
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,
04d7f601
DB
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
04d7f601
DB
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
05020c89
RD
24 */
25
98790382
SS
26#ifndef AVUTIL_INTERNAL_H
27#define AVUTIL_INTERNAL_H
05020c89 28
318049b8
MR
29#if !defined(DEBUG) && !defined(NDEBUG)
30# define NDEBUG
31#endif
32
ed0fd852 33#include <limits.h>
99545457 34#include <stdint.h>
318049b8
MR
35#include <stddef.h>
36#include <assert.h>
dbef3f46 37#include "config.h"
2ed6f399 38#include "attributes.h"
2f5421d5 39#include "timer.h"
d9f80ea2
AK
40#include "dict.h"
41
ab441e20
DB
42#if ARCH_X86
43# include "x86/emms.h"
44#endif
45
4db96649
DB
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)
5e4c7ca2
RP
52# define attribute_align_arg __attribute__((force_align_arg_pointer))
53#else
54# define attribute_align_arg
55#endif
56#endif
57
d66c52c2
MS
58#if defined(_MSC_VER) && CONFIG_SHARED
59# define av_export __declspec(dllimport)
60#else
61# define av_export
62#endif
63
cd107896 64#ifndef INT_BIT
28499cc8 65# define INT_BIT (CHAR_BIT * sizeof(int))
cd107896
MR
66#endif
67
218aefce
DB
68// Some broken preprocessors need a second expansion
69// to be forced to tokenize __VA_ARGS__
fd1abf42 70#define E1(x) x
218aefce
DB
71
72#define LOCAL_ALIGNED_A(a, t, v, s, o, ...) \
73 uint8_t la_##v[sizeof(t s o) + (a)]; \
74 t (*v) o = (void *)FFALIGN((uintptr_t)la_##v, a)
75
76#define LOCAL_ALIGNED_D(a, t, v, s, o, ...) \
77 DECLARE_ALIGNED(a, t, la_##v) s o; \
78 t (*v) o = la_##v
79
fd1abf42 80#define LOCAL_ALIGNED(a, t, v, ...) E1(LOCAL_ALIGNED_A(a, t, v, __VA_ARGS__,,))
218aefce
DB
81
82#if HAVE_LOCAL_ALIGNED_8
fd1abf42 83# define LOCAL_ALIGNED_8(t, v, ...) E1(LOCAL_ALIGNED_D(8, t, v, __VA_ARGS__,,))
218aefce
DB
84#else
85# define LOCAL_ALIGNED_8(t, v, ...) LOCAL_ALIGNED(8, t, v, __VA_ARGS__)
86#endif
87
88#if HAVE_LOCAL_ALIGNED_16
fd1abf42 89# define LOCAL_ALIGNED_16(t, v, ...) E1(LOCAL_ALIGNED_D(16, t, v, __VA_ARGS__,,))
218aefce
DB
90#else
91# define LOCAL_ALIGNED_16(t, v, ...) LOCAL_ALIGNED(16, t, v, __VA_ARGS__)
92#endif
93
d31dbec3 94#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
e48a0966 95{\
ee155011
DB
96 p = av_malloc(size);\
97 if (p == NULL && (size) != 0) {\
d31dbec3
RP
98 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
99 goto label;\
e48a0966
RP
100 }\
101}
102
d31dbec3 103#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
05020c89 104{\
ee155011
DB
105 p = av_mallocz(size);\
106 if (p == NULL && (size) != 0) {\
d31dbec3
RP
107 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
108 goto label;\
05020c89
RD
109 }\
110}
111
335ee1aa 112#include "libm.h"
7b04b8a0 113
d80a7fe5 114/**
49bd8e4b 115 * Return NULL if CONFIG_SMALL is true, otherwise the argument
bfe3676f 116 * without modification. Used to disable the definition of strings
d80a7fe5
AJ
117 * (for example AVCodec long_names).
118 */
119#if CONFIG_SMALL
120# define NULL_IF_CONFIG_SMALL(x) NULL
121#else
122# define NULL_IF_CONFIG_SMALL(x) x
123#endif
124
33586ee7
MN
125
126/**
cae70f99
MR
127 * Define a function with only the non-default version specified.
128 *
129 * On systems with ELF shared libraries, all symbols exported from
2912e87a 130 * Libav libraries are tagged with the name and major version of the
cae70f99
MR
131 * library to which they belong. If a function is moved from one
132 * library to another, a wrapper must be retained in the original
133 * location to preserve binary compatibility.
134 *
135 * Functions defined with this macro will never be used to resolve
136 * symbols by the build-time linker.
137 *
138 * @param type return type of function
139 * @param name name of function
140 * @param args argument list of function
141 * @param ver version tag to assign function
33586ee7 142 */
b462d132 143#if HAVE_SYMVER_ASM_LABEL
ccc87908
MR
144# define FF_SYMVER(type, name, args, ver) \
145 type ff_##name args __asm__ (EXTERN_PREFIX #name "@" ver); \
b462d132
MR
146 type ff_##name args
147#elif HAVE_SYMVER_GNU_ASM
ccc87908
MR
148# define FF_SYMVER(type, name, args, ver) \
149 __asm__ (".symver ff_" #name "," EXTERN_PREFIX #name "@" ver); \
150 type ff_##name args; \
b462d132
MR
151 type ff_##name args
152#endif
153
37b00b47 154/**
58c42af7 155 * Return NULL if a threading library has not been enabled.
37b00b47
AS
156 * Used to disable threading functions in AVCodec definitions
157 * when not needed.
158 */
159#if HAVE_THREADS
160# define ONLY_IF_THREADS_ENABLED(x) x
161#else
162# define ONLY_IF_THREADS_ENABLED(x) NULL
163#endif
164
98790382 165#endif /* AVUTIL_INTERNAL_H */