Part of MPlayer patch:
[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#ifndef attribute_used
30#if defined(__GNUC__) && (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
31# define attribute_used __attribute__((used))
32#else
33# define attribute_used
34#endif
35#endif
36
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37#ifndef M_PI
38#define M_PI 3.14159265358979323846
39#endif
40
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41#ifndef INT16_MIN
42#define INT16_MIN (-0x7fff-1)
43#endif
44
45#ifndef INT16_MAX
46#define INT16_MAX 0x7fff
47#endif
48
49#ifndef INT32_MIN
50#define INT32_MIN (-0x7fffffff-1)
51#endif
52
53#ifndef INT32_MAX
54#define INT32_MAX 0x7fffffff
55#endif
56
57#ifndef UINT32_MAX
58#define UINT32_MAX 0xffffffff
59#endif
60
61#ifndef INT64_MIN
62#define INT64_MIN (-0x7fffffffffffffffLL-1)
63#endif
64
65#ifndef INT64_MAX
8da9266c 66#define INT64_MAX INT64_C(9223372036854775807)
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67#endif
68
69#ifndef UINT64_MAX
8da9266c 70#define UINT64_MAX UINT64_C(0xFFFFFFFFFFFFFFFF)
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71#endif
72
73#ifndef INT_BIT
74# if INT_MAX != 2147483647
75# define INT_BIT 64
76# else
77# define INT_BIT 32
78# endif
79#endif
80
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81#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
82# define PIC
83#endif
84
cf1e119b 85#include "intreadwrite.h"
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86#include "bswap.h"
87
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88#include <stddef.h>
89#ifndef offsetof
635eb0cc 90# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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91#endif
92
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93#ifdef __MINGW32__
94# ifdef _DEBUG
95# define DEBUG
96# endif
97
98# define snprintf _snprintf
99# define vsnprintf _vsnprintf
100
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101/* __MINGW32__ end */
102#elif defined (CONFIG_OS2)
103/* OS/2 EMX */
104
635eb0cc 105# include <float.h>
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106
107#endif /* !__MINGW32__ && CONFIG_OS2 */
108
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109#ifdef USE_FASTMEMCPY
110# include "libvo/fastmemcpy.h"
6f74b71e 111# define memcpy(a,b,c) fast_memcpy(a,b,c)
635eb0cc 112#endif
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113
114// Use rip-relative addressing if compiling PIC code on x86-64.
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115#if defined(__MINGW32__) || defined(__CYGWIN__) || \
116 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
117# if defined(ARCH_X86_64) && defined(PIC)
118# define MANGLE(a) "_" #a"(%%rip)"
05020c89 119# else
635eb0cc 120# define MANGLE(a) "_" #a
05020c89 121# endif
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122#else
123# if defined(ARCH_X86_64) && defined(PIC)
124# define MANGLE(a) #a"(%%rip)"
125# elif defined(CONFIG_DARWIN)
126# define MANGLE(a) "_" #a
127# else
128# define MANGLE(a) #a
129# endif
130#endif
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131
132/* debug stuff */
133
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134#if !defined(DEBUG) && !defined(NDEBUG)
135# define NDEBUG
136#endif
137#include <assert.h>
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138
139/* dprintf macros */
635eb0cc 140#ifdef DEBUG
318c5e05 141# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
635eb0cc 142#else
318c5e05 143# define dprintf(pctx, ...)
635eb0cc 144#endif
05020c89 145
635eb0cc 146#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 147
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148/* math */
149
36cd3069 150extern const uint32_t ff_inverse[256];
05020c89 151
3cd52279 152#if defined(ARCH_X86)
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153# define FASTDIV(a,b) \
154 ({\
155 int ret,dmy;\
156 asm volatile(\
157 "mull %3"\
158 :"=d"(ret),"=a"(dmy)\
36cd3069 159 :"1"(a),"g"(ff_inverse[b])\
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160 );\
161 ret;\
162 })
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163#elif defined(ARCH_ARMV4L)
164# define FASTDIV(a,b) \
165 ({\
166 int ret,dmy;\
167 asm volatile(\
168 "umull %1, %0, %2, %3"\
169 :"=&r"(ret),"=&r"(dmy)\
36cd3069 170 :"r"(a),"r"(ff_inverse[b])\
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171 );\
172 ret;\
173 })
05020c89 174#elif defined(CONFIG_FASTDIV)
36cd3069 175# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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176#else
177# define FASTDIV(a,b) ((a)/(b))
178#endif
179
a77caa4d 180extern const uint8_t ff_sqrt_tab[128];
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181
182static inline int ff_sqrt(int a)
183{
184 int ret=0;
45221f7f 185 int s, b;
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186
187 if(a<128) return ff_sqrt_tab[a];
188
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189 for(s=30; s>=0; s-=2){
190 ret+=ret;
191 b= (1+2*ret)<<s;
05020c89 192 if(b<=a){
fd735e4b 193 a-=b;
45221f7f 194 ret++;
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195 }
196 }
197 return ret;
198}
199
3cd52279 200#if defined(ARCH_X86)
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201#define MASK_ABS(mask, level)\
202 asm volatile(\
203 "cdq \n\t"\
204 "xorl %1, %0 \n\t"\
205 "subl %1, %0 \n\t"\
206 : "+a" (level), "=&d" (mask)\
207 );
208#else
209#define MASK_ABS(mask, level)\
210 mask= level>>31;\
211 level= (level^mask)-mask;
212#endif
213
94e4c3a3 214#ifdef HAVE_CMOV
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215#define COPY3_IF_LT(x,y,a,b,c,d)\
216asm volatile (\
217 "cmpl %0, %3 \n\t"\
218 "cmovl %3, %0 \n\t"\
219 "cmovl %4, %1 \n\t"\
220 "cmovl %5, %2 \n\t"\
8c2e2040 221 : "+&r" (x), "+&r" (a), "+r" (c)\
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222 : "r" (y), "r" (b), "r" (d)\
223);
224#else
225#define COPY3_IF_LT(x,y,a,b,c,d)\
226if((y)<(x)){\
227 (x)=(y);\
228 (a)=(b);\
229 (c)=(d);\
230}
231#endif
232
233/* avoid usage of various functions */
234#define malloc please_use_av_malloc
235#define free please_use_av_free
236#define realloc please_use_av_realloc
237#define time time_is_forbidden_due_to_security_issues
238#define rand rand_is_forbidden_due_to_state_trashing
239#define srand srand_is_forbidden_due_to_state_trashing
240#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
241#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
c367d067 242#define exit exit_is_forbidden
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243#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
244#define printf please_use_av_log
245#define fprintf please_use_av_log
246#endif
247
248#define CHECKED_ALLOCZ(p, size)\
249{\
250 p= av_mallocz(size);\
251 if(p==NULL && (size)!=0){\
252 perror("malloc");\
253 goto fail;\
254 }\
255}
256
257#ifndef HAVE_LRINTF
258/* XXX: add ISOC specific test to avoid specific BSD testing. */
259/* better than nothing implementation. */
260/* btw, rintf() is existing on fbsd too -- alex */
849f1035 261static av_always_inline long int lrintf(float x)
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262{
263#ifdef __MINGW32__
419b8784 264# ifdef ARCH_X86_32
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265 int32_t i;
266 asm volatile(
267 "fistpl %0\n\t"
268 : "=m" (i) : "t" (x) : "st"
269 );
270 return i;
271# else
272 /* XXX: incorrect, but make it compile */
273 return (int)(x + (x < 0 ? -0.5 : 0.5));
419b8784 274# endif /* ARCH_X86_32 */
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275#else
276 return (int)(rint(x));
277#endif /* __MINGW32__ */
278}
279#endif /* HAVE_LRINTF */
280
281#endif /* INTERNAL_H */