Replace SYS_DARWIN by the more correct __APPLE_CC__, these preprocessor
[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
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21/**
22 * @file internal.h
23 * common internal api header.
24 */
25
26#ifndef INTERNAL_H
27#define INTERNAL_H
28
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29#if !defined(DEBUG) && !defined(NDEBUG)
30# define NDEBUG
31#endif
32
99545457 33#include <stdint.h>
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34#include <stddef.h>
35#include <assert.h>
99545457 36
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37#ifndef attribute_align_arg
38#if defined(__GNUC__) && (__GNUC__ > 4 || __GNUC__ == 4 && __GNUC_MINOR__>1)
39# define attribute_align_arg __attribute__((force_align_arg_pointer))
40#else
41# define attribute_align_arg
42#endif
43#endif
44
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45#ifndef attribute_used
46#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
47# define attribute_used __attribute__((used))
48#else
49# define attribute_used
50#endif
51#endif
52
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53#ifndef M_PI
54#define M_PI 3.14159265358979323846
55#endif
56
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57#ifndef INT16_MIN
58#define INT16_MIN (-0x7fff-1)
59#endif
60
61#ifndef INT16_MAX
62#define INT16_MAX 0x7fff
63#endif
64
65#ifndef INT32_MIN
66#define INT32_MIN (-0x7fffffff-1)
67#endif
68
69#ifndef INT32_MAX
70#define INT32_MAX 0x7fffffff
71#endif
72
73#ifndef UINT32_MAX
74#define UINT32_MAX 0xffffffff
75#endif
76
77#ifndef INT64_MIN
78#define INT64_MIN (-0x7fffffffffffffffLL-1)
79#endif
80
81#ifndef INT64_MAX
8da9266c 82#define INT64_MAX INT64_C(9223372036854775807)
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83#endif
84
85#ifndef UINT64_MAX
8da9266c 86#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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87#endif
88
89#ifndef INT_BIT
90# if INT_MAX != 2147483647
91# define INT_BIT 64
92# else
93# define INT_BIT 32
94# endif
95#endif
96
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97#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
98# define PIC
99#endif
100
cf1e119b 101#include "intreadwrite.h"
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102#include "bswap.h"
103
05020c89 104#ifndef offsetof
635eb0cc 105# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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106#endif
107
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108#ifdef USE_FASTMEMCPY
109# include "libvo/fastmemcpy.h"
6f74b71e 110# define memcpy(a,b,c) fast_memcpy(a,b,c)
635eb0cc 111#endif
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112
113// Use rip-relative addressing if compiling PIC code on x86-64.
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114#if defined(__MINGW32__) || defined(__CYGWIN__) || \
115 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
116# if defined(ARCH_X86_64) && defined(PIC)
117# define MANGLE(a) "_" #a"(%%rip)"
05020c89 118# else
635eb0cc 119# define MANGLE(a) "_" #a
05020c89 120# endif
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121#else
122# if defined(ARCH_X86_64) && defined(PIC)
123# define MANGLE(a) #a"(%%rip)"
9d16f87f 124# elif defined(SYS_DARWIN)
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125# define MANGLE(a) "_" #a
126# else
127# define MANGLE(a) #a
128# endif
129#endif
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130
131/* debug stuff */
132
05020c89 133/* dprintf macros */
635eb0cc 134#ifdef DEBUG
318c5e05 135# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
635eb0cc 136#else
318c5e05 137# define dprintf(pctx, ...)
635eb0cc 138#endif
05020c89 139
635eb0cc 140#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 141
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142/* math */
143
36cd3069 144extern const uint32_t ff_inverse[256];
05020c89 145
3cd52279 146#if defined(ARCH_X86)
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147# define FASTDIV(a,b) \
148 ({\
149 int ret,dmy;\
150 asm volatile(\
151 "mull %3"\
152 :"=d"(ret),"=a"(dmy)\
36cd3069 153 :"1"(a),"g"(ff_inverse[b])\
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154 );\
155 ret;\
156 })
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157#elif defined(ARCH_ARMV4L)
158# define FASTDIV(a,b) \
159 ({\
160 int ret,dmy;\
161 asm volatile(\
162 "umull %1, %0, %2, %3"\
163 :"=&r"(ret),"=&r"(dmy)\
36cd3069 164 :"r"(a),"r"(ff_inverse[b])\
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165 );\
166 ret;\
167 })
05020c89 168#elif defined(CONFIG_FASTDIV)
36cd3069 169# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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170#else
171# define FASTDIV(a,b) ((a)/(b))
172#endif
173
a77caa4d 174extern const uint8_t ff_sqrt_tab[128];
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175
176static inline int ff_sqrt(int a)
177{
178 int ret=0;
45221f7f 179 int s, b;
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180
181 if(a<128) return ff_sqrt_tab[a];
182
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183 for(s=30; s>=0; s-=2){
184 ret+=ret;
185 b= (1+2*ret)<<s;
05020c89 186 if(b<=a){
fd735e4b 187 a-=b;
45221f7f 188 ret++;
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189 }
190 }
191 return ret;
192}
193
3cd52279 194#if defined(ARCH_X86)
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195#define MASK_ABS(mask, level)\
196 asm volatile(\
197 "cdq \n\t"\
198 "xorl %1, %0 \n\t"\
199 "subl %1, %0 \n\t"\
200 : "+a" (level), "=&d" (mask)\
201 );
202#else
203#define MASK_ABS(mask, level)\
204 mask= level>>31;\
205 level= (level^mask)-mask;
206#endif
207
94e4c3a3 208#ifdef HAVE_CMOV
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209#define COPY3_IF_LT(x,y,a,b,c,d)\
210asm volatile (\
211 "cmpl %0, %3 \n\t"\
212 "cmovl %3, %0 \n\t"\
213 "cmovl %4, %1 \n\t"\
214 "cmovl %5, %2 \n\t"\
8c2e2040 215 : "+&r" (x), "+&r" (a), "+r" (c)\
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216 : "r" (y), "r" (b), "r" (d)\
217);
218#else
219#define COPY3_IF_LT(x,y,a,b,c,d)\
220if((y)<(x)){\
221 (x)=(y);\
222 (a)=(b);\
223 (c)=(d);\
224}
225#endif
226
227/* avoid usage of various functions */
84662c01 228#undef malloc
05020c89 229#define malloc please_use_av_malloc
84662c01 230#undef free
05020c89 231#define free please_use_av_free
84662c01 232#undef realloc
05020c89 233#define realloc please_use_av_realloc
84662c01 234#undef time
05020c89 235#define time time_is_forbidden_due_to_security_issues
84662c01 236#undef rand
3299fb45 237#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
84662c01 238#undef srand
3299fb45 239#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
84662c01 240#undef random
3299fb45 241#define random random_is_forbidden_due_to_state_trashing_use_av_random
84662c01 242#undef sprintf
05020c89 243#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
84662c01 244#undef strcat
272605c7 245#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
84662c01 246#undef exit
c367d067 247#define exit exit_is_forbidden
22490641 248#if !(defined(LIBAVFORMAT_BUILD) || defined(FRAMEHOOK_H))
84662c01 249#undef printf
05020c89 250#define printf please_use_av_log
84662c01 251#undef fprintf
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252#define fprintf please_use_av_log
253#endif
254
255#define CHECKED_ALLOCZ(p, size)\
256{\
257 p= av_mallocz(size);\
258 if(p==NULL && (size)!=0){\
259 perror("malloc");\
260 goto fail;\
261 }\
262}
263
264#ifndef HAVE_LRINTF
265/* XXX: add ISOC specific test to avoid specific BSD testing. */
266/* better than nothing implementation. */
267/* btw, rintf() is existing on fbsd too -- alex */
849f1035 268static av_always_inline long int lrintf(float x)
05020c89 269{
05020c89 270 return (int)(rint(x));
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271}
272#endif /* HAVE_LRINTF */
273
274#endif /* INTERNAL_H */