2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
4 * This file is part of FFmpeg.
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.
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.
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
22 * @file libavutil/internal.h
23 * common internal API header
26 #ifndef AVUTIL_INTERNAL_H
27 #define AVUTIL_INTERNAL_H
29 #if !defined(DEBUG) && !defined(NDEBUG)
42 #ifndef attribute_align_arg
43 #if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
44 # define attribute_align_arg __attribute__((force_align_arg_pointer))
46 # define attribute_align_arg
50 #ifndef attribute_used
51 #if AV_GCC_VERSION_AT_LEAST(3,1)
52 # define attribute_used __attribute__((used))
54 # define attribute_used
59 #if HAVE_ATTRIBUTE_MAY_ALIAS && (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(3,3)
60 # define av_alias __attribute__((may_alias))
67 #define INT16_MIN (-0x7fff - 1)
71 #define INT16_MAX 0x7fff
75 #define INT32_MIN (-0x7fffffff - 1)
79 #define INT32_MAX 0x7fffffff
83 #define UINT32_MAX 0xffffffff
87 #define INT64_MIN (-0x7fffffffffffffffLL - 1)
91 #define INT64_MAX INT64_C(9223372036854775807)
95 #define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
99 # define INT_BIT (CHAR_BIT * sizeof(int))
103 # define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
106 /* Use to export labels from asm. */
107 #define LABEL_MANGLE(a) EXTERN_PREFIX #a
109 // Use rip-relative addressing if compiling PIC code on x86-64.
110 #if ARCH_X86_64 && defined(PIC)
111 # define LOCAL_MANGLE(a) #a "(%%rip)"
113 # define LOCAL_MANGLE(a) #a
116 #define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
122 # define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
124 # define dprintf(pctx, ...)
127 #define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
132 #define MASK_ABS(mask, level)\
137 : "+a" (level), "=&d" (mask)\
140 #define MASK_ABS(mask, level)\
142 level = (level ^ mask) - mask;
145 /* avoid usage of dangerous/inappropriate system functions */
147 #define malloc please_use_av_malloc
149 #define free please_use_av_free
151 #define realloc please_use_av_realloc
153 #define time time_is_forbidden_due_to_security_issues
155 #define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
157 #define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
159 #define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
161 #define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
163 #define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
165 #define exit exit_is_forbidden
166 #ifndef LIBAVFORMAT_BUILD
168 #define printf please_use_av_log_instead_of_printf
170 #define fprintf please_use_av_log_instead_of_fprintf
172 #define puts please_use_av_log_instead_of_puts
174 #define perror please_use_av_log_instead_of_perror
177 #define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
179 p = av_malloc(size);\
180 if (p == NULL && (size) != 0) {\
181 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
186 #define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
188 p = av_mallocz(size);\
189 if (p == NULL && (size) != 0) {\
190 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
197 #define exp2(x) exp((x) * 0.693147180559945)
198 #endif /* HAVE_EXP2 */
202 #define exp2f(x) ((float)exp2(x))
203 #endif /* HAVE_EXP2F */
207 #define llrint(x) ((long long)rint(x))
208 #endif /* HAVE_LLRINT */
212 #define log2(x) (log(x) * 1.44269504088896340736)
213 #endif /* HAVE_LOG2 */
217 #define log2f(x) ((float)log2(x))
218 #endif /* HAVE_LOG2F */
221 static av_always_inline av_const long int lrint(double x)
225 #endif /* HAVE_LRINT */
228 static av_always_inline av_const long int lrintf(float x)
230 return (int)(rint(x));
232 #endif /* HAVE_LRINTF */
235 static av_always_inline av_const double round(double x)
237 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
239 #endif /* HAVE_ROUND */
242 static av_always_inline av_const float roundf(float x)
244 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
246 #endif /* HAVE_ROUNDF */
249 static av_always_inline av_const float truncf(float x)
251 return (x > 0) ? floor(x) : ceil(x);
253 #endif /* HAVE_TRUNCF */
256 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
257 * without modification. Used to disable the definition of strings
258 * (for example AVCodec long_names).
261 # define NULL_IF_CONFIG_SMALL(x) NULL
263 # define NULL_IF_CONFIG_SMALL(x) x
266 #endif /* AVUTIL_INTERNAL_H */