Add casts to correct return type in macros for missing libm funcs
[libav.git] / libavutil / internal.h
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1/*
2 * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at>
3 *
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4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
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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 *
b78e7197 11 * FFmpeg is distributed in the hope that it will be useful,
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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
b78e7197 17 * License along with FFmpeg; if not, write to the Free Software
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18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
05020c89 21/**
bad5537e 22 * @file libavutil/internal.h
89c9ff50 23 * common internal API header
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24 */
25
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26#ifndef AVUTIL_INTERNAL_H
27#define AVUTIL_INTERNAL_H
05020c89 28
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29#if !defined(DEBUG) && !defined(NDEBUG)
30# define NDEBUG
31#endif
32
ed0fd852 33#include <limits.h>
99545457 34#include <stdint.h>
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35#include <stddef.h>
36#include <assert.h>
dbef3f46 37#include "config.h"
52476c1b 38#include "common.h"
9d52d54d 39#include "mem.h"
2f5421d5 40#include "timer.h"
99545457 41
5e4c7ca2 42#ifndef attribute_align_arg
06be9d9d 43#if (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(4,2)
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44# define attribute_align_arg __attribute__((force_align_arg_pointer))
45#else
46# define attribute_align_arg
47#endif
48#endif
49
5403f857 50#ifndef attribute_used
52476c1b 51#if AV_GCC_VERSION_AT_LEAST(3,1)
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52# define attribute_used __attribute__((used))
53#else
54# define attribute_used
55#endif
56#endif
57
788627de 58#ifndef av_alias
8e339d4a 59#if HAVE_ATTRIBUTE_MAY_ALIAS && (!defined(__ICC) || __ICC > 1110) && AV_GCC_VERSION_AT_LEAST(3,3)
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60# define av_alias __attribute__((may_alias))
61#else
62# define av_alias
63#endif
64#endif
65
cd107896 66#ifndef INT16_MIN
ee155011 67#define INT16_MIN (-0x7fff - 1)
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68#endif
69
70#ifndef INT16_MAX
71#define INT16_MAX 0x7fff
72#endif
73
74#ifndef INT32_MIN
ee155011 75#define INT32_MIN (-0x7fffffff - 1)
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76#endif
77
78#ifndef INT32_MAX
79#define INT32_MAX 0x7fffffff
80#endif
81
82#ifndef UINT32_MAX
83#define UINT32_MAX 0xffffffff
84#endif
85
86#ifndef INT64_MIN
ee155011 87#define INT64_MIN (-0x7fffffffffffffffLL - 1)
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88#endif
89
90#ifndef INT64_MAX
8da9266c 91#define INT64_MAX INT64_C(9223372036854775807)
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92#endif
93
94#ifndef UINT64_MAX
8da9266c 95#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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96#endif
97
98#ifndef INT_BIT
28499cc8 99# define INT_BIT (CHAR_BIT * sizeof(int))
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100#endif
101
05020c89 102#ifndef offsetof
ee155011 103# define offsetof(T, F) ((unsigned int)((char *)&((T *)0)->F))
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104#endif
105
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106/* Use to export labels from asm. */
107#define LABEL_MANGLE(a) EXTERN_PREFIX #a
108
05020c89 109// Use rip-relative addressing if compiling PIC code on x86-64.
b250f9c6 110#if ARCH_X86_64 && defined(PIC)
df22c35d 111# define LOCAL_MANGLE(a) #a "(%%rip)"
edfd6975 112#else
df22c35d 113# define LOCAL_MANGLE(a) #a
635eb0cc 114#endif
05020c89 115
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116#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
117
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118/* debug stuff */
119
05020c89 120/* dprintf macros */
635eb0cc 121#ifdef DEBUG
318c5e05 122# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
635eb0cc 123#else
318c5e05 124# define dprintf(pctx, ...)
635eb0cc 125#endif
05020c89 126
635eb0cc 127#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 128
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129/* math */
130
c448a096 131extern const uint8_t ff_sqrt_tab[256];
05020c89 132
85074d3c 133static inline av_const unsigned int ff_sqrt(unsigned int a)
05020c89 134{
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135 unsigned int b;
136
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137 if (a < 255) return (ff_sqrt_tab[a + 1] - 1) >> 4;
138 else if (a < (1 << 12)) b = ff_sqrt_tab[a >> 4] >> 2;
b250f9c6 139#if !CONFIG_SMALL
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140 else if (a < (1 << 14)) b = ff_sqrt_tab[a >> 6] >> 1;
141 else if (a < (1 << 16)) b = ff_sqrt_tab[a >> 8] ;
c448a096 142#endif
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143 else {
144 int s = av_log2_16bit(a >> 16) >> 1;
145 unsigned int c = a >> (s + 2);
146 b = ff_sqrt_tab[c >> (s + 8)];
147 b = FASTDIV(c,b) + (b << s);
05020c89 148 }
c448a096 149
ee155011 150 return b - (a < b * b);
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151}
152
b250f9c6 153#if ARCH_X86
05020c89 154#define MASK_ABS(mask, level)\
be449fca 155 __asm__ volatile(\
7e14b808 156 "cltd \n\t"\
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157 "xorl %1, %0 \n\t"\
158 "subl %1, %0 \n\t"\
159 : "+a" (level), "=&d" (mask)\
160 );
161#else
162#define MASK_ABS(mask, level)\
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163 mask = level >> 31;\
164 level = (level ^ mask) - mask;
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165#endif
166
7d685b48 167/* avoid usage of dangerous/inappropriate system functions */
84662c01 168#undef malloc
05020c89 169#define malloc please_use_av_malloc
84662c01 170#undef free
05020c89 171#define free please_use_av_free
84662c01 172#undef realloc
05020c89 173#define realloc please_use_av_realloc
84662c01 174#undef time
05020c89 175#define time time_is_forbidden_due_to_security_issues
84662c01 176#undef rand
9f5da4d1 177#define rand rand_is_forbidden_due_to_state_trashing_use_av_lfg_get
84662c01 178#undef srand
9f5da4d1 179#define srand srand_is_forbidden_due_to_state_trashing_use_av_lfg_init
84662c01 180#undef random
9f5da4d1 181#define random random_is_forbidden_due_to_state_trashing_use_av_lfg_get
84662c01 182#undef sprintf
05020c89 183#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
84662c01 184#undef strcat
272605c7 185#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
84662c01 186#undef exit
c367d067 187#define exit exit_is_forbidden
6123abad 188#ifndef LIBAVFORMAT_BUILD
84662c01 189#undef printf
b58f29a1 190#define printf please_use_av_log_instead_of_printf
84662c01 191#undef fprintf
b58f29a1 192#define fprintf please_use_av_log_instead_of_fprintf
59ec6991 193#undef puts
b58f29a1 194#define puts please_use_av_log_instead_of_puts
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195#undef perror
196#define perror please_use_av_log_instead_of_perror
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197#endif
198
d31dbec3 199#define FF_ALLOC_OR_GOTO(ctx, p, size, label)\
e48a0966 200{\
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201 p = av_malloc(size);\
202 if (p == NULL && (size) != 0) {\
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203 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
204 goto label;\
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205 }\
206}
207
d31dbec3 208#define FF_ALLOCZ_OR_GOTO(ctx, p, size, label)\
05020c89 209{\
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210 p = av_mallocz(size);\
211 if (p == NULL && (size) != 0) {\
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212 av_log(ctx, AV_LOG_ERROR, "Cannot allocate memory.\n");\
213 goto label;\
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214 }\
215}
216
6b7c7703 217#if !HAVE_EXP2
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218#undef exp2
219#define exp2(x) exp((x) * 0.693147180559945)
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220#endif /* HAVE_EXP2 */
221
222#if !HAVE_EXP2F
06cb7a1c 223#undef exp2f
7ed63ca2 224#define exp2f(x) ((float)exp2(x))
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225#endif /* HAVE_EXP2F */
226
b250f9c6 227#if !HAVE_LLRINT
8e05f069 228#undef llrint
7ed63ca2 229#define llrint(x) ((long long)rint(x))
a33cab3a 230#endif /* HAVE_LLRINT */
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231
232#if !HAVE_LOG2
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233#undef log2
234#define log2(x) (log(x) * 1.44269504088896340736)
291fd18a 235#endif /* HAVE_LOG2 */
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236
237#if !HAVE_LOG2F
06cb7a1c 238#undef log2f
7ed63ca2 239#define log2f(x) ((float)log2(x))
6b7c7703 240#endif /* HAVE_LOG2F */
a33cab3a 241
b250f9c6 242#if !HAVE_LRINT
85074d3c 243static av_always_inline av_const long int lrint(double x)
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244{
245 return rint(x);
246}
247#endif /* HAVE_LRINT */
248
b250f9c6 249#if !HAVE_LRINTF
85074d3c 250static av_always_inline av_const long int lrintf(float x)
05020c89 251{
05020c89 252 return (int)(rint(x));
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253}
254#endif /* HAVE_LRINTF */
255
b250f9c6 256#if !HAVE_ROUND
85074d3c 257static av_always_inline av_const double round(double x)
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258{
259 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
260}
261#endif /* HAVE_ROUND */
262
b250f9c6 263#if !HAVE_ROUNDF
85074d3c 264static av_always_inline av_const float roundf(float x)
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265{
266 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
267}
268#endif /* HAVE_ROUNDF */
269
b250f9c6 270#if !HAVE_TRUNCF
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271static av_always_inline av_const float truncf(float x)
272{
273 return (x > 0) ? floor(x) : ceil(x);
274}
275#endif /* HAVE_TRUNCF */
276
d80a7fe5 277/**
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278 * Returns NULL if CONFIG_SMALL is true, otherwise the argument
279 * without modification. Used to disable the definition of strings
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280 * (for example AVCodec long_names).
281 */
282#if CONFIG_SMALL
283# define NULL_IF_CONFIG_SMALL(x) NULL
284#else
285# define NULL_IF_CONFIG_SMALL(x) x
286#endif
287
98790382 288#endif /* AVUTIL_INTERNAL_H */