Move BeOS-specific code into os_support.c.
[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
29#if ( defined(__PIC__) || defined(__pic__) ) && ! defined(PIC)
30# define PIC
31#endif
32
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33#ifndef ENODATA
34# define ENODATA 61
35#endif
05020c89 36
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37#include "bswap.h"
38
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39#include <stddef.h>
40#ifndef offsetof
635eb0cc 41# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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42#endif
43
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44#ifdef __MINGW32__
45# ifdef _DEBUG
46# define DEBUG
47# endif
48
49# define snprintf _snprintf
50# define vsnprintf _vsnprintf
51
52# ifdef CONFIG_WINCE
53# define perror(a)
f940f7c9 54# define abort()
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55# endif
56
57/* __MINGW32__ end */
58#elif defined (CONFIG_OS2)
59/* OS/2 EMX */
60
635eb0cc 61# include <float.h>
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62
63#endif /* !__MINGW32__ && CONFIG_OS2 */
64
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65#ifdef USE_FASTMEMCPY
66# include "libvo/fastmemcpy.h"
67#endif
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68
69// Use rip-relative addressing if compiling PIC code on x86-64.
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70#if defined(__MINGW32__) || defined(__CYGWIN__) || \
71 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
72# if defined(ARCH_X86_64) && defined(PIC)
73# define MANGLE(a) "_" #a"(%%rip)"
05020c89 74# else
635eb0cc 75# define MANGLE(a) "_" #a
05020c89 76# endif
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77#else
78# if defined(ARCH_X86_64) && defined(PIC)
79# define MANGLE(a) #a"(%%rip)"
80# elif defined(CONFIG_DARWIN)
81# define MANGLE(a) "_" #a
82# else
83# define MANGLE(a) #a
84# endif
85#endif
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86
87/* debug stuff */
88
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89#if !defined(DEBUG) && !defined(NDEBUG)
90# define NDEBUG
91#endif
92#include <assert.h>
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93
94/* dprintf macros */
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95#ifdef DEBUG
96# define dprintf(fmt,...) av_log(NULL, AV_LOG_DEBUG, fmt, __VA_ARGS__)
97#else
98# define dprintf(fmt,...)
99#endif
05020c89 100
635eb0cc 101#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 102
36cd3069 103extern const uint32_t ff_inverse[256];
05020c89 104
3cd52279 105#if defined(ARCH_X86)
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106# define FASTDIV(a,b) \
107 ({\
108 int ret,dmy;\
109 asm volatile(\
110 "mull %3"\
111 :"=d"(ret),"=a"(dmy)\
36cd3069 112 :"1"(a),"g"(ff_inverse[b])\
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113 );\
114 ret;\
115 })
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116#elif defined(ARCH_ARMV4L)
117# define FASTDIV(a,b) \
118 ({\
119 int ret,dmy;\
120 asm volatile(\
121 "umull %1, %0, %2, %3"\
122 :"=&r"(ret),"=&r"(dmy)\
36cd3069 123 :"r"(a),"r"(ff_inverse[b])\
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124 );\
125 ret;\
126 })
05020c89 127#elif defined(CONFIG_FASTDIV)
36cd3069 128# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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129#else
130# define FASTDIV(a,b) ((a)/(b))
131#endif
132
133/* math */
134extern FF_IMPORT_ATTR const uint8_t ff_sqrt_tab[128];
135
136static inline int ff_sqrt(int a)
137{
138 int ret=0;
139 int s;
140 int ret_sq=0;
141
142 if(a<128) return ff_sqrt_tab[a];
143
144 for(s=15; s>=0; s--){
145 int b= ret_sq + (1<<(s*2)) + (ret<<s)*2;
146 if(b<=a){
147 ret_sq=b;
148 ret+= 1<<s;
149 }
150 }
151 return ret;
152}
153
3cd52279 154#if defined(ARCH_X86)
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155#define MASK_ABS(mask, level)\
156 asm volatile(\
157 "cdq \n\t"\
158 "xorl %1, %0 \n\t"\
159 "subl %1, %0 \n\t"\
160 : "+a" (level), "=&d" (mask)\
161 );
162#else
163#define MASK_ABS(mask, level)\
164 mask= level>>31;\
165 level= (level^mask)-mask;
166#endif
167
94e4c3a3 168#ifdef HAVE_CMOV
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169#define COPY3_IF_LT(x,y,a,b,c,d)\
170asm volatile (\
171 "cmpl %0, %3 \n\t"\
172 "cmovl %3, %0 \n\t"\
173 "cmovl %4, %1 \n\t"\
174 "cmovl %5, %2 \n\t"\
175 : "+r" (x), "+r" (a), "+r" (c)\
176 : "r" (y), "r" (b), "r" (d)\
177);
178#else
179#define COPY3_IF_LT(x,y,a,b,c,d)\
180if((y)<(x)){\
181 (x)=(y);\
182 (a)=(b);\
183 (c)=(d);\
184}
185#endif
186
187/* avoid usage of various functions */
188#define malloc please_use_av_malloc
189#define free please_use_av_free
190#define realloc please_use_av_realloc
191#define time time_is_forbidden_due_to_security_issues
192#define rand rand_is_forbidden_due_to_state_trashing
193#define srand srand_is_forbidden_due_to_state_trashing
194#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
195#define strcat strcat_is_forbidden_due_to_security_issues_use_pstrcat
196#if !(defined(LIBAVFORMAT_BUILD) || defined(_FRAMEHOOK_H))
197#define printf please_use_av_log
198#define fprintf please_use_av_log
199#endif
200
201#define CHECKED_ALLOCZ(p, size)\
202{\
203 p= av_mallocz(size);\
204 if(p==NULL && (size)!=0){\
205 perror("malloc");\
206 goto fail;\
207 }\
208}
209
210#ifndef HAVE_LRINTF
211/* XXX: add ISOC specific test to avoid specific BSD testing. */
212/* better than nothing implementation. */
213/* btw, rintf() is existing on fbsd too -- alex */
214static always_inline long int lrintf(float x)
215{
216#ifdef __MINGW32__
419b8784 217# ifdef ARCH_X86_32
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218 int32_t i;
219 asm volatile(
220 "fistpl %0\n\t"
221 : "=m" (i) : "t" (x) : "st"
222 );
223 return i;
224# else
225 /* XXX: incorrect, but make it compile */
226 return (int)(x + (x < 0 ? -0.5 : 0.5));
419b8784 227# endif /* ARCH_X86_32 */
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228#else
229 return (int)(rint(x));
230#endif /* __MINGW32__ */
231}
232#endif /* HAVE_LRINTF */
233
234#endif /* INTERNAL_H */