simplify ALIGN_MASK definition
[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
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53/* Use Apple-specific AltiVec syntax for vector declarations when necessary. */
54#ifdef __APPLE_CC__
55#define AVV(x...) (x)
56#else
57#define AVV(x...) {x}
58#endif
59
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60#ifndef M_PI
61#define M_PI 3.14159265358979323846
62#endif
63
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64#ifndef INT16_MIN
65#define INT16_MIN (-0x7fff-1)
66#endif
67
68#ifndef INT16_MAX
69#define INT16_MAX 0x7fff
70#endif
71
72#ifndef INT32_MIN
73#define INT32_MIN (-0x7fffffff-1)
74#endif
75
76#ifndef INT32_MAX
77#define INT32_MAX 0x7fffffff
78#endif
79
80#ifndef UINT32_MAX
81#define UINT32_MAX 0xffffffff
82#endif
83
84#ifndef INT64_MIN
85#define INT64_MIN (-0x7fffffffffffffffLL-1)
86#endif
87
88#ifndef INT64_MAX
8da9266c 89#define INT64_MAX INT64_C(9223372036854775807)
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90#endif
91
92#ifndef UINT64_MAX
8da9266c 93#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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94#endif
95
96#ifndef INT_BIT
97# if INT_MAX != 2147483647
98# define INT_BIT 64
99# else
100# define INT_BIT 32
101# endif
102#endif
103
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104#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
105# define PIC
106#endif
107
a087028a 108#include "config.h"
cf1e119b 109#include "intreadwrite.h"
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110#include "bswap.h"
111
05020c89 112#ifndef offsetof
635eb0cc 113# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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114#endif
115
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116#ifdef USE_FASTMEMCPY
117# include "libvo/fastmemcpy.h"
6f74b71e 118# define memcpy(a,b,c) fast_memcpy(a,b,c)
635eb0cc 119#endif
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120
121// Use rip-relative addressing if compiling PIC code on x86-64.
4f365f37 122#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__DJGPP__) || \
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123 defined(__OS2__) || defined(__APPLE__) || \
124 (defined (__OpenBSD__) && !defined(__ELF__))
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125# if defined(ARCH_X86_64) && defined(PIC)
126# define MANGLE(a) "_" #a"(%%rip)"
05020c89 127# else
635eb0cc 128# define MANGLE(a) "_" #a
05020c89 129# endif
edfd6975 130#elif defined(ARCH_X86_64) && defined(PIC)
08e89160 131# define MANGLE(a) #a"(%%rip)"
edfd6975 132#else
08e89160 133# define MANGLE(a) #a
635eb0cc 134#endif
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135
136/* debug stuff */
137
05020c89 138/* dprintf macros */
635eb0cc 139#ifdef DEBUG
318c5e05 140# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
635eb0cc 141#else
318c5e05 142# define dprintf(pctx, ...)
635eb0cc 143#endif
05020c89 144
635eb0cc 145#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 146
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147/* math */
148
36cd3069 149extern const uint32_t ff_inverse[256];
05020c89 150
3cd52279 151#if defined(ARCH_X86)
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152# define FASTDIV(a,b) \
153 ({\
154 int ret,dmy;\
155 asm volatile(\
156 "mull %3"\
157 :"=d"(ret),"=a"(dmy)\
36cd3069 158 :"1"(a),"g"(ff_inverse[b])\
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159 );\
160 ret;\
161 })
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162#elif defined(ARCH_ARMV4L)
163# define FASTDIV(a,b) \
164 ({\
165 int ret,dmy;\
166 asm volatile(\
167 "umull %1, %0, %2, %3"\
168 :"=&r"(ret),"=&r"(dmy)\
36cd3069 169 :"r"(a),"r"(ff_inverse[b])\
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170 );\
171 ret;\
172 })
05020c89 173#elif defined(CONFIG_FASTDIV)
36cd3069 174# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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175#else
176# define FASTDIV(a,b) ((a)/(b))
177#endif
178
c448a096 179extern const uint8_t ff_sqrt_tab[256];
05020c89 180
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181static inline int av_log2_16bit(unsigned int v);
182
183static inline unsigned int ff_sqrt(unsigned int a)
05020c89 184{
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185 unsigned int b;
186
187 if(a<255) return (ff_sqrt_tab[a+1]-1)>>4;
188 else if(a<(1<<12)) b= ff_sqrt_tab[a>>4 ]>>2;
189#ifndef CONFIG_SMALL
190 else if(a<(1<<14)) b= ff_sqrt_tab[a>>6 ]>>1;
191 else if(a<(1<<16)) b= ff_sqrt_tab[a>>8 ] ;
192#endif
193 else{
194 int s= av_log2_16bit(a>>16)>>1;
195 unsigned int c= a>>(s+2);
196 b= ff_sqrt_tab[c>>(s+8)];
197 b= FASTDIV(c,b) + (b<<s);
05020c89 198 }
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199
200 return b - (a<b*b);
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201}
202
3cd52279 203#if defined(ARCH_X86)
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204#define MASK_ABS(mask, level)\
205 asm volatile(\
7e14b808 206 "cltd \n\t"\
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207 "xorl %1, %0 \n\t"\
208 "subl %1, %0 \n\t"\
209 : "+a" (level), "=&d" (mask)\
210 );
211#else
212#define MASK_ABS(mask, level)\
213 mask= level>>31;\
214 level= (level^mask)-mask;
215#endif
216
94e4c3a3 217#ifdef HAVE_CMOV
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218#define COPY3_IF_LT(x,y,a,b,c,d)\
219asm volatile (\
220 "cmpl %0, %3 \n\t"\
221 "cmovl %3, %0 \n\t"\
222 "cmovl %4, %1 \n\t"\
223 "cmovl %5, %2 \n\t"\
8c2e2040 224 : "+&r" (x), "+&r" (a), "+r" (c)\
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225 : "r" (y), "r" (b), "r" (d)\
226);
227#else
228#define COPY3_IF_LT(x,y,a,b,c,d)\
229if((y)<(x)){\
230 (x)=(y);\
231 (a)=(b);\
232 (c)=(d);\
233}
234#endif
235
236/* avoid usage of various functions */
84662c01 237#undef malloc
05020c89 238#define malloc please_use_av_malloc
84662c01 239#undef free
05020c89 240#define free please_use_av_free
84662c01 241#undef realloc
05020c89 242#define realloc please_use_av_realloc
84662c01 243#undef time
05020c89 244#define time time_is_forbidden_due_to_security_issues
84662c01 245#undef rand
3299fb45 246#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
84662c01 247#undef srand
3299fb45 248#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
84662c01 249#undef random
3299fb45 250#define random random_is_forbidden_due_to_state_trashing_use_av_random
84662c01 251#undef sprintf
05020c89 252#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
84662c01 253#undef strcat
272605c7 254#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
84662c01 255#undef exit
c367d067 256#define exit exit_is_forbidden
4f9c008c 257#if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
84662c01 258#undef printf
05020c89 259#define printf please_use_av_log
84662c01 260#undef fprintf
05020c89 261#define fprintf please_use_av_log
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262#undef puts
263#define puts please_use_av_log
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264#undef perror
265#define perror please_use_av_log_instead_of_perror
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266#endif
267
268#define CHECKED_ALLOCZ(p, size)\
269{\
270 p= av_mallocz(size);\
271 if(p==NULL && (size)!=0){\
7f0cd6a5 272 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
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273 goto fail;\
274 }\
275}
276
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277#ifndef HAVE_LLRINT
278static av_always_inline long long llrint(double x)
279{
280 return rint(x);
281}
282#endif /* HAVE_LLRINT */
283
284#ifndef HAVE_LRINT
285static av_always_inline long int lrint(double x)
286{
287 return rint(x);
288}
289#endif /* HAVE_LRINT */
290
05020c89 291#ifndef HAVE_LRINTF
849f1035 292static av_always_inline long int lrintf(float x)
05020c89 293{
05020c89 294 return (int)(rint(x));
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295}
296#endif /* HAVE_LRINTF */
297
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298#ifndef HAVE_ROUND
299static av_always_inline double round(double x)
300{
301 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
302}
303#endif /* HAVE_ROUND */
304
305#ifndef HAVE_ROUNDF
306static av_always_inline float roundf(float x)
307{
308 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
309}
310#endif /* HAVE_ROUNDF */
311
5b21bdab 312#endif /* FFMPEG_INTERNAL_H */