ARM: disable use of system byteswap.h
[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
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26#ifndef FFMPEG_INTERNAL_H
27#define FFMPEG_INTERNAL_H
05020c89 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
d7bd0b3d 53#ifdef HAVE_ALTIVEC
b006b26c 54#ifdef HAVE_ALTIVEC_VECTOR_BRACES
8008a043 55#define AVV(x...) {x}
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56#else
57#define AVV(x...) (x)
8008a043 58#endif
d7bd0b3d 59#endif
8008a043 60
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61#ifndef M_PI
62#define M_PI 3.14159265358979323846
63#endif
64
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65#ifndef INT16_MIN
66#define INT16_MIN (-0x7fff-1)
67#endif
68
69#ifndef INT16_MAX
70#define INT16_MAX 0x7fff
71#endif
72
73#ifndef INT32_MIN
74#define INT32_MIN (-0x7fffffff-1)
75#endif
76
77#ifndef INT32_MAX
78#define INT32_MAX 0x7fffffff
79#endif
80
81#ifndef UINT32_MAX
82#define UINT32_MAX 0xffffffff
83#endif
84
85#ifndef INT64_MIN
86#define INT64_MIN (-0x7fffffffffffffffLL-1)
87#endif
88
89#ifndef INT64_MAX
8da9266c 90#define INT64_MAX INT64_C(9223372036854775807)
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91#endif
92
93#ifndef UINT64_MAX
8da9266c 94#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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95#endif
96
97#ifndef INT_BIT
98# if INT_MAX != 2147483647
99# define INT_BIT 64
100# else
101# define INT_BIT 32
102# endif
103#endif
104
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105#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
106# define PIC
107#endif
108
a087028a 109#include "config.h"
cf1e119b 110#include "intreadwrite.h"
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111#include "bswap.h"
112
05020c89 113#ifndef offsetof
635eb0cc 114# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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115#endif
116
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117#ifdef USE_FASTMEMCPY
118# include "libvo/fastmemcpy.h"
6f74b71e 119# define memcpy(a,b,c) fast_memcpy(a,b,c)
635eb0cc 120#endif
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121
122// Use rip-relative addressing if compiling PIC code on x86-64.
b4d96ba2 123#if defined(ARCH_X86_64) && defined(PIC)
df22c35d 124# define LOCAL_MANGLE(a) #a "(%%rip)"
edfd6975 125#else
df22c35d 126# define LOCAL_MANGLE(a) #a
635eb0cc 127#endif
05020c89 128
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129#define MANGLE(a) EXTERN_PREFIX LOCAL_MANGLE(a)
130
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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
c448a096 174extern const uint8_t ff_sqrt_tab[256];
05020c89 175
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176static inline int av_log2_16bit(unsigned int v);
177
85074d3c 178static inline av_const unsigned int ff_sqrt(unsigned int a)
05020c89 179{
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180 unsigned int b;
181
182 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
183 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
184#ifndef CONFIG_SMALL
185 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
186 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
187#endif
188 else{
189 int s= av_log2_16bit(a>>16)>>1;
190 unsigned int c= a>>(s+2);
191 b= ff_sqrt_tab[c>>(s+8)];
192 b= FASTDIV(c,b) + (b<<s);
05020c89 193 }
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194
195 return b - (a<b*b);
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196}
197
3cd52279 198#if defined(ARCH_X86)
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199#define MASK_ABS(mask, level)\
200 asm volatile(\
7e14b808 201 "cltd \n\t"\
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202 "xorl %1, %0 \n\t"\
203 "subl %1, %0 \n\t"\
204 : "+a" (level), "=&d" (mask)\
205 );
206#else
207#define MASK_ABS(mask, level)\
208 mask= level>>31;\
209 level= (level^mask)-mask;
210#endif
211
94e4c3a3 212#ifdef HAVE_CMOV
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213#define COPY3_IF_LT(x,y,a,b,c,d)\
214asm volatile (\
215 "cmpl %0, %3 \n\t"\
216 "cmovl %3, %0 \n\t"\
217 "cmovl %4, %1 \n\t"\
218 "cmovl %5, %2 \n\t"\
8c2e2040 219 : "+&r" (x), "+&r" (a), "+r" (c)\
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220 : "r" (y), "r" (b), "r" (d)\
221);
222#else
223#define COPY3_IF_LT(x,y,a,b,c,d)\
224if((y)<(x)){\
225 (x)=(y);\
226 (a)=(b);\
227 (c)=(d);\
228}
229#endif
230
231/* avoid usage of various functions */
84662c01 232#undef malloc
05020c89 233#define malloc please_use_av_malloc
84662c01 234#undef free
05020c89 235#define free please_use_av_free
84662c01 236#undef realloc
05020c89 237#define realloc please_use_av_realloc
84662c01 238#undef time
05020c89 239#define time time_is_forbidden_due_to_security_issues
84662c01 240#undef rand
3299fb45 241#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
84662c01 242#undef srand
3299fb45 243#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
84662c01 244#undef random
3299fb45 245#define random random_is_forbidden_due_to_state_trashing_use_av_random
84662c01 246#undef sprintf
05020c89 247#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
84662c01 248#undef strcat
272605c7 249#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
84662c01 250#undef exit
c367d067 251#define exit exit_is_forbidden
4f9c008c 252#if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
84662c01 253#undef printf
05020c89 254#define printf please_use_av_log
84662c01 255#undef fprintf
05020c89 256#define fprintf please_use_av_log
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257#undef puts
258#define puts please_use_av_log
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259#undef perror
260#define perror please_use_av_log_instead_of_perror
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261#endif
262
263#define CHECKED_ALLOCZ(p, size)\
264{\
265 p= av_mallocz(size);\
266 if(p==NULL && (size)!=0){\
7f0cd6a5 267 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
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268 goto fail;\
269 }\
270}
271
a33cab3a 272#ifndef HAVE_LLRINT
85074d3c 273static av_always_inline av_const long long llrint(double x)
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274{
275 return rint(x);
276}
277#endif /* HAVE_LLRINT */
278
279#ifndef HAVE_LRINT
85074d3c 280static av_always_inline av_const long int lrint(double x)
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281{
282 return rint(x);
283}
284#endif /* HAVE_LRINT */
285
05020c89 286#ifndef HAVE_LRINTF
85074d3c 287static av_always_inline av_const long int lrintf(float x)
05020c89 288{
05020c89 289 return (int)(rint(x));
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290}
291#endif /* HAVE_LRINTF */
292
a33cab3a 293#ifndef HAVE_ROUND
85074d3c 294static av_always_inline av_const double round(double x)
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295{
296 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
297}
298#endif /* HAVE_ROUND */
299
300#ifndef HAVE_ROUNDF
85074d3c 301static av_always_inline av_const float roundf(float x)
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302{
303 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
304}
305#endif /* HAVE_ROUNDF */
306
5b21bdab 307#endif /* FFMPEG_INTERNAL_H */