Add minimal support for H.264 video in the SDP generator
[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
cf1e119b 108#include "intreadwrite.h"
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109#include "bswap.h"
110
05020c89 111#ifndef offsetof
635eb0cc 112# define offsetof(T,F) ((unsigned int)((char *)&((T *)0)->F))
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113#endif
114
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115#ifdef USE_FASTMEMCPY
116# include "libvo/fastmemcpy.h"
6f74b71e 117# define memcpy(a,b,c) fast_memcpy(a,b,c)
635eb0cc 118#endif
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119
120// Use rip-relative addressing if compiling PIC code on x86-64.
4f365f37 121#if defined(__MINGW32__) || defined(__CYGWIN__) || defined(__DJGPP__) || \
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122 defined(__OS2__) || (defined (__OpenBSD__) && !defined(__ELF__))
123# if defined(ARCH_X86_64) && defined(PIC)
124# define MANGLE(a) "_" #a"(%%rip)"
05020c89 125# else
635eb0cc 126# define MANGLE(a) "_" #a
05020c89 127# endif
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128#else
129# if defined(ARCH_X86_64) && defined(PIC)
130# define MANGLE(a) #a"(%%rip)"
c97f5402 131# elif defined(__APPLE__)
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132# define MANGLE(a) "_" #a
133# else
134# define MANGLE(a) #a
135# endif
136#endif
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137
138/* debug stuff */
139
05020c89 140/* dprintf macros */
635eb0cc 141#ifdef DEBUG
318c5e05 142# define dprintf(pctx, ...) av_log(pctx, AV_LOG_DEBUG, __VA_ARGS__)
635eb0cc 143#else
318c5e05 144# define dprintf(pctx, ...)
635eb0cc 145#endif
05020c89 146
635eb0cc 147#define av_abort() do { av_log(NULL, AV_LOG_ERROR, "Abort at %s:%d\n", __FILE__, __LINE__); abort(); } while (0)
05020c89 148
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149/* math */
150
36cd3069 151extern const uint32_t ff_inverse[256];
05020c89 152
3cd52279 153#if defined(ARCH_X86)
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154# define FASTDIV(a,b) \
155 ({\
156 int ret,dmy;\
157 asm volatile(\
158 "mull %3"\
159 :"=d"(ret),"=a"(dmy)\
36cd3069 160 :"1"(a),"g"(ff_inverse[b])\
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161 );\
162 ret;\
163 })
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164#elif defined(ARCH_ARMV4L)
165# define FASTDIV(a,b) \
166 ({\
167 int ret,dmy;\
168 asm volatile(\
169 "umull %1, %0, %2, %3"\
170 :"=&r"(ret),"=&r"(dmy)\
36cd3069 171 :"r"(a),"r"(ff_inverse[b])\
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172 );\
173 ret;\
174 })
05020c89 175#elif defined(CONFIG_FASTDIV)
36cd3069 176# define FASTDIV(a,b) ((uint32_t)((((uint64_t)a)*ff_inverse[b])>>32))
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177#else
178# define FASTDIV(a,b) ((a)/(b))
179#endif
180
a77caa4d 181extern const uint8_t ff_sqrt_tab[128];
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182
183static inline int ff_sqrt(int a)
184{
185 int ret=0;
45221f7f 186 int s, b;
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187
188 if(a<128) return ff_sqrt_tab[a];
189
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190 for(s=30; s>=0; s-=2){
191 ret+=ret;
192 b= (1+2*ret)<<s;
05020c89 193 if(b<=a){
fd735e4b 194 a-=b;
45221f7f 195 ret++;
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196 }
197 }
198 return ret;
199}
200
3cd52279 201#if defined(ARCH_X86)
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202#define MASK_ABS(mask, level)\
203 asm volatile(\
204 "cdq \n\t"\
205 "xorl %1, %0 \n\t"\
206 "subl %1, %0 \n\t"\
207 : "+a" (level), "=&d" (mask)\
208 );
209#else
210#define MASK_ABS(mask, level)\
211 mask= level>>31;\
212 level= (level^mask)-mask;
213#endif
214
94e4c3a3 215#ifdef HAVE_CMOV
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216#define COPY3_IF_LT(x,y,a,b,c,d)\
217asm volatile (\
218 "cmpl %0, %3 \n\t"\
219 "cmovl %3, %0 \n\t"\
220 "cmovl %4, %1 \n\t"\
221 "cmovl %5, %2 \n\t"\
8c2e2040 222 : "+&r" (x), "+&r" (a), "+r" (c)\
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223 : "r" (y), "r" (b), "r" (d)\
224);
225#else
226#define COPY3_IF_LT(x,y,a,b,c,d)\
227if((y)<(x)){\
228 (x)=(y);\
229 (a)=(b);\
230 (c)=(d);\
231}
232#endif
233
234/* avoid usage of various functions */
84662c01 235#undef malloc
05020c89 236#define malloc please_use_av_malloc
84662c01 237#undef free
05020c89 238#define free please_use_av_free
84662c01 239#undef realloc
05020c89 240#define realloc please_use_av_realloc
84662c01 241#undef time
05020c89 242#define time time_is_forbidden_due_to_security_issues
84662c01 243#undef rand
3299fb45 244#define rand rand_is_forbidden_due_to_state_trashing_use_av_random
84662c01 245#undef srand
3299fb45 246#define srand srand_is_forbidden_due_to_state_trashing_use_av_init_random
84662c01 247#undef random
3299fb45 248#define random random_is_forbidden_due_to_state_trashing_use_av_random
84662c01 249#undef sprintf
05020c89 250#define sprintf sprintf_is_forbidden_due_to_security_issues_use_snprintf
84662c01 251#undef strcat
272605c7 252#define strcat strcat_is_forbidden_due_to_security_issues_use_av_strlcat
84662c01 253#undef exit
c367d067 254#define exit exit_is_forbidden
4f9c008c 255#if !(defined(LIBAVFORMAT_BUILD) || defined(FFMPEG_FRAMEHOOK_H))
84662c01 256#undef printf
05020c89 257#define printf please_use_av_log
84662c01 258#undef fprintf
05020c89 259#define fprintf please_use_av_log
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260#undef puts
261#define puts please_use_av_log
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262#undef perror
263#define perror please_use_av_log_instead_of_perror
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264#endif
265
266#define CHECKED_ALLOCZ(p, size)\
267{\
268 p= av_mallocz(size);\
269 if(p==NULL && (size)!=0){\
7f0cd6a5 270 av_log(NULL, AV_LOG_ERROR, "Cannot allocate memory.");\
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271 goto fail;\
272 }\
273}
274
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275#ifndef HAVE_LLRINT
276static av_always_inline long long llrint(double x)
277{
278 return rint(x);
279}
280#endif /* HAVE_LLRINT */
281
282#ifndef HAVE_LRINT
283static av_always_inline long int lrint(double x)
284{
285 return rint(x);
286}
287#endif /* HAVE_LRINT */
288
05020c89 289#ifndef HAVE_LRINTF
849f1035 290static av_always_inline long int lrintf(float x)
05020c89 291{
05020c89 292 return (int)(rint(x));
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293}
294#endif /* HAVE_LRINTF */
295
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296#ifndef HAVE_ROUND
297static av_always_inline double round(double x)
298{
299 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
300}
301#endif /* HAVE_ROUND */
302
303#ifndef HAVE_ROUNDF
304static av_always_inline float roundf(float x)
305{
306 return (x > 0) ? floor(x + 0.5) : ceil(x - 0.5);
307}
308#endif /* HAVE_ROUNDF */
309
5b21bdab 310#endif /* FFMPEG_INTERNAL_H */