| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | ||
| 3 | * | ||
| 4 | * This file is part of FFmpeg. | ||
| 5 | * | ||
| 6 | * FFmpeg 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 | * FFmpeg 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 FFmpeg; if not, write to the Free Software | ||
| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
| 19 | */ | ||
| 20 | |||
| 21 | /** | ||
| 22 | * @file | ||
| 23 | * common internal API header | ||
| 24 | */ | ||
| 25 | |||
| 26 | #ifndef AVUTIL_INTERNAL_H | ||
| 27 | #define AVUTIL_INTERNAL_H | ||
| 28 | |||
| 29 | #if !defined(DEBUG) && !defined(NDEBUG) | ||
| 30 | # define NDEBUG | ||
| 31 | #endif | ||
| 32 | |||
| 33 | // This can be enabled to allow detection of additional integer overflows with ubsan | ||
| 34 | //#define CHECKED | ||
| 35 | |||
| 36 | #include <limits.h> | ||
| 37 | #include <stdint.h> | ||
| 38 | #include <stddef.h> | ||
| 39 | #include <assert.h> | ||
| 40 | #include <stdio.h> | ||
| 41 | #include "config.h" | ||
| 42 | #include "attributes.h" | ||
| 43 | #include "libm.h" | ||
| 44 | #include "macros.h" | ||
| 45 | |||
| 46 | #ifndef attribute_align_arg | ||
| 47 | #if ARCH_X86_32 && AV_GCC_VERSION_AT_LEAST(4,2) | ||
| 48 | # define attribute_align_arg __attribute__((force_align_arg_pointer)) | ||
| 49 | #else | ||
| 50 | # define attribute_align_arg | ||
| 51 | #endif | ||
| 52 | #endif | ||
| 53 | |||
| 54 | #if HAVE_PRAGMA_DEPRECATED | ||
| 55 | # if defined(__ICL) || defined (__INTEL_COMPILER) | ||
| 56 | # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:1478)) | ||
| 57 | # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop)) | ||
| 58 | # elif defined(_MSC_VER) | ||
| 59 | # define FF_DISABLE_DEPRECATION_WARNINGS __pragma(warning(push)) __pragma(warning(disable:4996)) | ||
| 60 | # define FF_ENABLE_DEPRECATION_WARNINGS __pragma(warning(pop)) | ||
| 61 | # else | ||
| 62 | # define FF_DISABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic push") _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") | ||
| 63 | # define FF_ENABLE_DEPRECATION_WARNINGS _Pragma("GCC diagnostic pop") | ||
| 64 | # endif | ||
| 65 | #else | ||
| 66 | # define FF_DISABLE_DEPRECATION_WARNINGS | ||
| 67 | # define FF_ENABLE_DEPRECATION_WARNINGS | ||
| 68 | #endif | ||
| 69 | |||
| 70 | |||
| 71 | #define FF_ALLOC_TYPED_ARRAY(p, nelem) (p = av_malloc_array(nelem, sizeof(*p))) | ||
| 72 | #define FF_ALLOCZ_TYPED_ARRAY(p, nelem) (p = av_calloc(nelem, sizeof(*p))) | ||
| 73 | |||
| 74 | #define FF_PTR_ADD(ptr, off) ((off) ? (ptr) + (off) : (ptr)) | ||
| 75 | |||
| 76 | /** | ||
| 77 | * Access a field in a structure by its offset. | ||
| 78 | */ | ||
| 79 | #define FF_FIELD_AT(type, off, obj) (*(type *)((char *)&(obj) + (off))) | ||
| 80 | |||
| 81 | /** | ||
| 82 | * Return NULL if CONFIG_SMALL is true, otherwise the argument | ||
| 83 | * without modification. Used to disable the definition of strings. | ||
| 84 | */ | ||
| 85 | #if CONFIG_SMALL | ||
| 86 | # define NULL_IF_CONFIG_SMALL(x) NULL | ||
| 87 | #else | ||
| 88 | # define NULL_IF_CONFIG_SMALL(x) x | ||
| 89 | #endif | ||
| 90 | |||
| 91 | /** | ||
| 92 | * Log a generic warning message about a missing feature. | ||
| 93 | * | ||
| 94 | * @param[in] avc a pointer to an arbitrary struct of which the first | ||
| 95 | * field is a pointer to an AVClass struct | ||
| 96 | * @param[in] msg string containing the name of the missing feature | ||
| 97 | */ | ||
| 98 | void avpriv_report_missing_feature(void *avc, | ||
| 99 | const char *msg, ...) av_printf_format(2, 3); | ||
| 100 | |||
| 101 | /** | ||
| 102 | * Log a generic warning message about a missing feature. | ||
| 103 | * Additionally request that a sample showcasing the feature be uploaded. | ||
| 104 | * | ||
| 105 | * @param[in] avc a pointer to an arbitrary struct of which the first field is | ||
| 106 | * a pointer to an AVClass struct | ||
| 107 | * @param[in] msg string containing the name of the missing feature | ||
| 108 | */ | ||
| 109 | void avpriv_request_sample(void *avc, | ||
| 110 | const char *msg, ...) av_printf_format(2, 3); | ||
| 111 | |||
| 112 | #ifdef DEBUG | ||
| 113 | # define ff_dlog(ctx, ...) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__) | ||
| 114 | #else | ||
| 115 | # define ff_dlog(ctx, ...) do { if (0) av_log(ctx, AV_LOG_DEBUG, __VA_ARGS__); } while (0) | ||
| 116 | #endif | ||
| 117 | |||
| 118 | #ifdef TRACE | ||
| 119 | # define ff_tlog(ctx, ...) av_log(ctx, AV_LOG_TRACE, __VA_ARGS__) | ||
| 120 | #else | ||
| 121 | # define ff_tlog(ctx, ...) do { } while(0) | ||
| 122 | #endif | ||
| 123 | |||
| 124 | // For debugging we use signed operations so overflows can be detected (by ubsan) | ||
| 125 | // For production we use unsigned so there are no undefined operations | ||
| 126 | #ifdef CHECKED | ||
| 127 | #define SUINT int | ||
| 128 | #define SUINT32 int32_t | ||
| 129 | #else | ||
| 130 | #define SUINT unsigned | ||
| 131 | #define SUINT32 uint32_t | ||
| 132 | #endif | ||
| 133 | |||
| 134 | 113853554 | static av_always_inline av_const int avpriv_mirror(int x, int w) | |
| 135 | { | ||
| 136 |
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113853554 | if (!w) |
| 137 | ✗ | return 0; | |
| 138 | |||
| 139 |
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260366399 | while ((unsigned)x > (unsigned)w) { |
| 140 | 32659291 | x = -x; | |
| 141 |
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32659291 | if (x < 0) |
| 142 | 14979534 | x += 2 * w; | |
| 143 | } | ||
| 144 | 113853554 | return x; | |
| 145 | } | ||
| 146 | |||
| 147 | #endif /* AVUTIL_INTERNAL_H */ | ||
| 148 |